CN107354005B

CN107354005B - Grease deodorization system

Info

Publication number: CN107354005B
Application number: CN201710721318.2A
Authority: CN
Inventors: 杭明; 周二晓; 徐静; 孙化荣
Original assignee: Myande Group Co Ltd
Current assignee: Myande Group Co Ltd
Priority date: 2017-08-22
Filing date: 2017-08-22
Publication date: 2023-05-30
Anticipated expiration: 2037-08-22
Also published as: CN107354005A

Abstract

The invention relates to a grease deodorization system, which comprises a combined deodorization tower and a re-gas stripping energy-saving tower, wherein the upper part of a deodorization tower cylinder is connected with a distillate trapping tower communicated with the deodorization tower cylinder, and the top of the distillate trapping tower is provided with a trapping tower vacuumizing port; an oil heating pool is arranged at the upper part of the inner cavity of the deodorizing tower barrel, an air flow channel is arranged at the periphery of the oil heating pool, an oil inlet pipe and an oil outlet pipe of the oil heating pool are connected to the upper part of the oil heating pool, a plate tower gas stripping section is arranged below the oil heating pool, the plate tower gas stripping section comprises a multi-layer plate tower section tray device, the plate tower section tray device positioned at the top layer is connected with a plate tower section oil inlet pipe, and the plate tower section tray device positioned at the bottom layer is connected with a plate tower section oil outlet pipe; the lower part of the plate tower stripping section is provided with a filling gas stripping section, the upper part of the filling gas stripping section is provided with a filling gas inlet pipe, and the bottom of the deodorizing tower barrel is connected with a filling gas outlet pipe. The packing layer is arranged in the center of the lower part of the plate tower section. The grease deodorization system has high vacuum degree, good steam stripping effect and less grease hydrolysis loss.

Description

Grease deodorization system

Technical Field

The invention relates to an oil deodorization system which can be used for deodorization operation in vegetable oil refining and belongs to the technical field of vegetable oil refining complete equipment.

Background

In the vegetable oil refining process, the vegetable oil is required to be processed into a deodorizing finished oil through a deodorizing process, and the deodorizing process is usually completed in a deodorizing tower and is used for volatilizing or evaporating and removing odor substances in the vegetable oil.

The deodorization of vegetable oil is a high-temperature and high-vacuum steam distillation process, which not only needs to remove free fatty acid, aldehyde, ketone, unsaturated hydrocarbon compounds and other odor substances in grease, but also can remove decomposition products, small molecular ring aromatic hydrocarbon and pesticide residues generated by improper mildew of peroxide, oil growth, transportation and storage, and simultaneously damages part of pigments in the high-temperature process to decompose and remove the pigments. Therefore, deodorization of the grease is the most critical step of removing odor, improving smoke point, improving flavor and improving quality of edible oil.

Most of the prior deodorizing systems are packed towers and combined towers, the upper part is a packed tower, the lower part is a plate tower, when stripping steam and stripping distillate on each layer of the plate tower flow through the packing layer above after being collected, vapor resistance is generated to cause vacuum deterioration of the plate tower section, which is not beneficial to removing low-component odor substances in oil, and simultaneously, polymerization reaction is easy to occur, so that the quality of vegetable oil is influenced. The prior deodorizing system has the defects of poor deodorizing and stripping effects, so the aim of removing the odor substances to the greatest extent is fulfilled by long-time high-temperature stay, but the content of trans-fatty acid is increased, and the trans-fatty acid has great harm to human health and is more and more valued by people. On the other hand, the beneficial component VE in the vegetable oil is also carried out along with the deodorizing distillate while the deodorizing substances are removed, and the VE cannot be effectively recovered and comprehensively utilized by a subsequent deodorizing distillate collecting device, namely a fatty acid collector. In addition, the existing deodorization system adopts a single combined mode of a packed tower and a plate tower, the whole deodorization process of the vegetable oil is finished according to a set flow, and aiming at the characteristics of different oils, the adaptability and the adjustability in production are greatly reduced, so that the same index of the finished oil is achieved, and the input cost is increased.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provide the grease deodorization system which has high overall vacuum degree, good stripping effect and less grease hydrolysis loss.

In order to solve the technical problems, the grease deodorization system comprises a combined deodorization tower and a re-gas stripping energy-saving tower, wherein the combined deodorization tower comprises a cylindrical deodorization tower cylinder, the upper part of the deodorization tower cylinder is connected with a distillate trapping tower communicated with the deodorization tower cylinder, the top of the distillate trapping tower is provided with a trapping tower vacuumizing port, and the trapping tower vacuumizing port is connected with a vacuumizing system through a deodorization tower vacuumizing pipe; the upper part of the inner cavity of the deodorizing tower cylinder is provided with an oil heating pool, the oil heating pool and the deodorizing tower cylinder are coaxial, an air flow channel is arranged between the oil heating pool and the inner wall of the deodorizing tower cylinder, the upper part of the oil heating pool is connected with an oil outlet pipe of the oil heating pool, the upper part of the oil heating pool is provided with an oil inlet pipe of the oil heating pool, and the tail end of the oil inlet pipe of the oil heating pool is inserted below the oil level line of the oil heating pool; a plate tower gas stripping section is arranged below the oil heating pool and comprises a multi-layer plate tower section tray device, the plate tower section tray device positioned at the top layer is connected with a plate tower section oil inlet pipe, and the plate tower section tray device positioned at the bottom layer is connected with a plate tower section oil outlet pipe; the lower part of the plate tower stripping section is provided with a filling gas stripping section, the upper part of the filling gas stripping section is provided with a filling gas inlet pipe, and the bottom of the deodorizing tower barrel is connected with a filling gas outlet pipe.

Compared with the prior art, the invention has the following beneficial effects: the vegetable oil is heated to high temperature by an oil heating pool, and is subjected to two-stage multistage gas stripping by a plate tower gas stripping section and a filler gas stripping section to remove free fatty acid, aldehyde, ketone, unsaturated hydrocarbon carbon compounds and other odor substances in grease, and also to remove decomposition products, small molecular ring aromatic hydrocarbon and pesticide residues generated by improper mildew of peroxide, oil transportation and storage, and meanwhile, partial pigment can be destroyed in the high temperature process to decompose and remove the pigment; the stripped fraction is captured by the distillate capturing tower and output. The vacuum degree in the combined deodorizing tower is maintained by the vacuumizing pipe of the deodorizing tower, the two-section parallel steam extraction is realized by the plate tower gas extraction section and the filler gas extraction section, the deodorizing whole process is always in a high vacuum environment, odor substances are removed, the smoke point and the stability of an oil product are improved, and the polymerization reaction of small molecules in the oil at high temperature is avoided, so that the oil quality is influenced.

As an improvement of the invention, each plate tower Duan Dapan device comprises a tray which cuts off the cross section of a cylinder body and is opened upwards, an oil level with a certain height is kept in each tray, stripping steam annular pipes are respectively distributed at the bottom of each tray, each stripping steam annular pipe is respectively connected with a direct steam pipe, a plurality of stripping pumps are respectively and uniformly arranged on each stripping steam annular pipe, the upper end of each direct steam pipe is respectively higher than the oil level line of the tray on which the corresponding stripping steam annular pipe is positioned and extends out of the cylinder body of the deodorizing tower, each tray on the upper layer is respectively provided with a liquid seal overflow pipe, the upper port of each liquid seal overflow pipe is lower than the oil level line of the tray on the lower layer, and the lower end of each liquid seal overflow pipe extends to below the oil level line of the tray on the lower layer; the gas phase spaces among the tray devices of each laminate tower section are respectively communicated with each other through tray center gas permeability pipes, each tray center gas permeability pipe is positioned right below the oil heating pool, the upper end of the gas permeability pipe is higher than the oil level line of the tray where the gas permeability pipe is positioned, and the lower end of the gas permeability pipe is leveled with the bottom of the corresponding tray. The high-temperature vegetable oil flows into a tray of the top plate tower section tray device from the plate tower section oil inlet pipe, the direct steam pipe provides high-temperature steam for each stripping pump through the stripping steam ring pipe, and each stripping pump carries out stripping removal on odor substances in the vegetable oil in the process of flowing the vegetable oil on the tray; vegetable oil on the tray at the upper layer flows into the next layer from the liquid seal overflow pipe in sequence to continue gas stripping, fractions at each layer flow into the distillate capturing tower from the central vent pipe of the tray, each gas stripping pump plays the best stripping effect, and the retention time is controllable; because the retention time of the high-temperature vegetable oil on each layer of tray is longer, the pigment is decomposed and removed, and the decoloring effect is achieved.

As a further improvement of the invention, the filler gas stripping section comprises a filler layer cylinder coaxial with the deodorizing tower cylinder, wherein deodorizing filler is arranged in the inner cavity of the filler layer cylinder, a gas stripping section oil distributor for uniformly distributing oil to the deodorizing filler is arranged at the upper part of the inner cavity of the filler layer cylinder, and the total inlet of the gas stripping section oil distributor is connected with the inner end head of the filler section oil inlet pipe; the packing layer cylinder body is embedded in the center of the lower part of the plate tower gas stripping section, and the tray device of the two-layer plate tower section at the lowest part surrounds the periphery of the packing layer cylinder body; and a multi-layer filler section tray device is arranged below the deodorizing filler. The high-temperature vegetable oil enters from the oil inlet pipe of the filler section, is distributed by the oil distributor of the gas stripping section, and is uniformly scattered into the deodorizing filler, so that odorous substances such as free fatty acid and the like can be stripped rapidly due to the very large specific surface area of the vegetable oil in the deodorizing filler; the packing layer cylinder is wrapped in the plate tower, so that the deodorizing packing does not have heat loss in the shell area, and the distilled substances such as the free fatty acid and the like which are extracted by gas cannot be condensed in the tower, thereby achieving the best integral stripping effect and reducing the grease hydrolysis loss; and the plant oil after the rapid gas stripping sequentially flows through the gas stripping of the tray device with the lower multilayer filling section. Because the resistance of the airflow channel above the deodorizing filler is very small, the top of the filler stripping section is directly subjected to vacuum suction at the top of the tower, and the phenomenon that the vacuum degree of the plate tower section is insufficient due to the fact that the filler layer is arranged on the upper part of the cylinder body is avoided. The deodorizing tower has the advantages of compact structure, no excessive gas phase pipelines, incapability of condensing distillate, higher capturing component of the subsequent distillate VE, low air extraction resistance, good system tightness and better vacuum in the tower.

As a further improvement of the invention, an auxiliary gas phase channel is arranged at the upper layer of the two-layer plate tower section tower tray device positioned at the periphery of the packing layer cylinder body, the auxiliary gas phase channel is formed by encircling the deodorizing tower cylinder body and the arc-shaped baffle plate, the upper end of the arc-shaped baffle plate is higher than the liquid level of the layer, the lower end of the arc-shaped baffle plate is connected to the tower tray of the layer, and the auxiliary gas phase channel penetrates through the tower tray of the layer. Because the packing layer cylinder is embedded in the tray of the two layers at the lowest part of the plate tower stripping section, an auxiliary gas phase channel is separated in the tray of the upper layer of the embedded two layers by the arc-shaped baffle plate, and the fraction stripped by the tray device of the layer at the lowest part of the plate tower stripping section can be timely extracted, thereby improving the integral stripping effect.

As a further improvement of the invention, two stripping steam annular pipes are arranged in the tray, a plurality of stripping pumps are respectively arranged on the two stripping steam annular pipes, an annular partition plate is arranged between the two stripping steam annular pipes, a radial partition plate is arranged between a central ventilation pipe of the tray and the deodorizing tower cylinder, and an overflow gap is reserved on one side of the intersection part of the annular partition plate and the radial partition plate, so that grease flows in series along the inner side and the outer side of the annular partition plate; the bottom of the tray is also provided with annular steam jet pipes, and a plurality of downward-inclined jet holes are respectively arranged along the annular steam jet pipes. The gas stripping pumps are distributed with the gas stripping steam ring pipe in the tray, so that on one hand, the gas stripping strength is improved, on the other hand, in each layer of tray, due to the separation of the annular partition plate and the radial partition plate, vegetable oil flows through the whole circumference of the inner periphery of the tray, then flows into the outer periphery of the tray from the flow gap of the annular partition plate and flows through the whole circumference of the outer periphery, and thus the vegetable oil sequentially flows through each gas stripping pump on the inner ring and then sequentially flows through each gas stripping pump on the outer ring; the next layer sequentially flows through each stripping pump on the outer ring and then sequentially flows through each stripping pump on the inner ring, so that the flowing distance of vegetable oil on each tray is prolonged, and the stripping strength of each layer is greatly improved. In addition, the jet hole of the annular steam jet pipe jets steam to stir and stripping the vegetable oil.

As a further improvement of the invention, the top of the distillate collecting tower is provided with a silk screen collector, a two-stage distillate collecting device is arranged below the silk screen collector, each distillate collecting device comprises a fraction distributor, and the inlet of each fraction distributor is connected with a fraction inlet pipe; the lower part of each fraction distributor is provided with a trapping tower filler, the lower center of each trapping tower filler is provided with a liquid blocking cover, the lower part of each liquid blocking cover is provided with a liquid receiving disc, the periphery of each liquid receiving disc is respectively connected to the inner wall of the slip trapping tower, the center of each liquid receiving disc is respectively provided with a liquid receiving disc center vent pipe penetrating upwards, and each liquid blocking cover is respectively covered above the liquid receiving disc center vent pipe; the bottom of each liquid receiving disc is respectively connected with a deodorizing fraction outlet pipe; the outlet pipe of each deodorizing fraction is respectively connected with the inlet of a circulating pump, the outlet of the circulating pump is respectively connected with the inlet of a fraction cooler, and the outlet of the fraction cooler is respectively connected with the fraction inlet pipe of the stage; the outlets of the fraction coolers are also respectively connected with a deodorizing fraction output pipe. When the gas stripping distillate upwards flows through the first-stage distillate collecting device, VE is collected in the first-stage collecting tower filler, the condensed VE falls into the first-stage liquid receiving disc, is pumped out by the first-stage circulating pump, is cooled by the first-stage fraction cooler, returns to the first-stage fraction inlet pipe, is distributed by the first-stage fraction distributor and then circularly sprays to the first-stage collecting tower filler, and the redundant VE is output from the VE output pipe. When the gas stripping distillate upwards flows through the secondary distillate collecting device again, fatty acid is collected in the secondary collecting tower filler, condensed fatty acid falls into the secondary liquid receiving disc, is pumped out by the secondary circulating pump, is cooled by the secondary fraction cooler, returns to the secondary fraction inlet pipe, is distributed by the secondary fraction distributor and circularly sprays to the secondary collecting tower filler, and redundant fatty acid is output from the fatty acid output pipe. Thus, the VE and fatty acid are independently recovered, the purity is high, and the subsequent comprehensive utilization is convenient.

As a further improvement of the invention, the inner cavity of the oil heating pool is divided into a plurality of oil pool heating cavities by the oil heating pool partition plate extending along the radial direction, U-shaped heating tube bundles are respectively inserted into the oil pool heating cavities, the inlets of the U-shaped heating tube bundles are respectively connected with a high-pressure steam inlet main pipe, and the outlets of the U-shaped heating tube bundles are respectively connected with a high-pressure steam outlet main pipe; the inlet of the high-pressure heating boiler of the high-pressure steam outlet main pipe is connected, and the outlet of the high-pressure heating boiler is connected with the high-pressure steam inlet main pipe; one end of each oil heating pool partition board is connected with the cylinder wall of the oil heating pool, an overflow gap is reserved between the other end of each oil heating pool partition board and the cylinder wall, and the overflow gaps of the adjacent oil heating pool partition boards are sequentially staggered to enable the heating cavities of the adjacent oil heating pools to be sequentially connected in series; the bottom of each oil pool heating cavity is provided with a stirring steam pipe respectively; a plurality of tube bundle baffles which extend vertically are arranged along the length direction of each U-shaped heating tube bundle, and adjacent tube bundle baffles are staggered in sequence in the height direction. Heating vegetable oil to high temperature by utilizing heat energy of high-pressure steam, wherein the vegetable oil is repeatedly folded and flowed in the up-down direction under the separation and the guide of a tube bundle partition board in each oil pool heating cavity; then under the separation and the direction of oil heating pond baffle, adjacent oil pond heating chamber establishes ties in proper order for vegetable oil turns back the flow many times in the fore-and-aft direction again, has prolonged the quilt of vegetable oil time so greatly, makes U-shaped heating tube bank and vegetable oil's heat exchange efficiency high. And meanwhile, the oil heating tank is convenient for modularization and standardized manufacturing.

As a further improvement of the invention, the bottoms of the oil heating pool and the trays are respectively connected with an emptying pipe, and each emptying pipe is respectively communicated with the oil storage space of the lower tray through an emptying valve. By opening the drain valve of one layer, the oil of the tray of the layer can directly flow into the next layer, so that the number of layers of the tray deodorization device which is actually put into use can be adjusted according to the requirement.

As a further improvement of the invention, an energy-saving tower vacuumizing port is arranged at the top of the re-gas stripping energy-saving tower, an energy-saving tower oil inlet pipe is arranged at the upper part of an inner cavity of the re-gas stripping energy-saving tower, an energy-saving tower oil distributor is arranged below the energy-saving tower oil inlet pipe, an energy-saving tower filler is arranged below the energy-saving tower oil distributor, an energy-saving tower heat exchanger is arranged below the energy-saving tower filler, an oil inlet to be deodorized is arranged at the lower part of a shell side of the energy-saving tower heat exchanger, an oil outlet to be deodorized is arranged at the upper part of the shell side of the energy-saving tower heat exchanger, a deodorization product oil tank is connected below a lower tube plate of the energy-saving tower heat exchanger, a re-gas stripping pump is arranged in the inner cavity of the deodorization product oil tank and is connected with a direct steam pipe, an antioxidant adding port is arranged on the side wall of the deodorization product oil tank, and a deodorization product oil outlet is arranged at the bottom of the deodorization product oil tank.

The tail end of the deodorization system is provided with a re-gas stripping energy-saving tower, high-temperature vegetable oil flowing out from a plate tower section oil outlet pipe or a filler section oil outlet pipe of the combined deodorization tower enters an energy-saving tower oil inlet pipe, is uniformly distributed by an energy-saving tower oil distributor, enters an energy-saving tower filler for re-gas stripping, improves the stability of the finished oil, improves the flavor and improves the quality, then enters an energy-saving tower heat exchanger for preheating fresh oil to be deodorized, fully recovers heat, and finally the finished oil is discharged from a deodorization finished oil outlet at the bottom of a deodorization finished oil tank. Depending on the oil product, the re-stripping pump may be started or an antioxidant may be added to the finished oil through an antioxidant addition port.

As a further improvement of the invention, the outlet of the oil to be deodorized is connected with the inlet of the oil inlet pipe of the oil heating tank, the outlet of the oil outlet pipe of the oil heating tank is connected with a valve I and a valve II in parallel, the outlet of the valve I is connected with the oil inlet pipe of the plate tower section, and the outlet of the valve II is connected with the oil inlet pipe of the filler section; the oil outlet pipe of the plate tower section is connected with the inlet of the first conveying pump, the outlet of the first conveying pump is connected with a valve III and a valve IV in parallel, the outlet of the valve III is connected with the oil inlet pipe of the filling section, and the outlet of the valve IV is connected with the inlet of the oil inlet pipe of the energy-saving tower; the oil outlet pipe of the filling section is connected with the inlet of the second conveying pump, the outlet of the second conveying pump is connected with a valve five and a valve six in parallel, the outlet of the valve five is connected with the inlet of the oil inlet pipe of the energy-saving tower, and the outlet of the valve six is connected with the oil inlet pipe of the plate tower section; the energy-saving tower vacuumizing port is connected with the vacuumizing system through an energy-saving tower vacuumizing pipe. The plant oil way runoff Cheng Linghuo in the deodorization process is adjustable, and has strong adaptability and adjustability aiming at the characteristics of different oils; the vegetable oil with high unsaturated fatty acid content is easy to hydrolyze in the deodorization process, the valve I, the valve III and the valve V are opened, the valve II, the valve IV and the valve VI are closed, the vegetable oil firstly enters the gas stripping section of the plate tower, the high-temperature process is longer, the pigment is completely decomposed, the decolorization effect of the vegetable oil is ensured, and the odor substances are removed to the greatest extent; then enters a filling gas stripping section, so that hydrolytic substances generated in the plate tower gas stripping section can be stripped rapidly, and the integral decolorization and deodorization effects are ensured. For the vegetable oil with high acid value and high free fatty acid content, the valve II, the valve IV and the valve VI are opened, and the valve I, the valve III and the valve V are closed, so that the vegetable oil is firstly subjected to gas stripping by the filling material, the free fatty acid can be rapidly stripped, the steam consumption per unit yield is low, and then the vegetable oil enters the gas stripping section of the plate tower, so that the integral decolorization and deodorization effects are ensured.

Drawings

The invention will now be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration only and are not intended to limit the invention.

FIG. 1 is a flow chart of the grease deodorization system of the present invention.

Fig. 2 is a schematic structural view of the combined deodorizing tower shown in fig. 1.

Fig. 3 is a schematic cross-sectional view of the second layer tray arrangement of fig. 2.

Fig. 4 is a schematic cross-sectional view of the upper tray assembly of the outer periphery of the packing layer cartridge of fig. 2.

Fig. 5 is a top view of the oil heating tank of fig. 2.

Fig. 6 is a perspective view of the U-shaped heating tube bundle of fig. 2.

Fig. 7 is a schematic structural view of the re-stripping energy-saving tower in fig. 1.

In the figure: 1. a combined deodorizing tower; 1a, a vacuum pumping port of a trapping tower; 1b, a silk screen catcher; 1c, a fraction inlet pipe; 1d, a fraction distributor; 1e, collecting tower filler; 1f, a liquid blocking cover; 1g, a liquid receiving disc; 1h, deodorizing a distillate outlet pipe; 1j, an oil heating pool; 1j1, an oil inlet pipe of an oil heating tank; 1j2, an oil outlet pipe of an oil heating tank; 1j3, an oil heating tank baffle plate; a 1j4. U-shaped heating tube bundle; 1j5, a tube bundle baffle; 1j6, stirring a steam pipe; 1m, a plate tower stripping section; 1m1, an oil inlet pipe of a plate tower section; 1m2, an oil outlet pipe of the plate tower section; 1m3. Trays; 1m4. Stripping steam loop; 1m5, a gas stripping pump; 1m6, a vent pipe at the center of the tray; 1m7, annular separator; 1m8 radial separator; 1m9, an annular steam jet pipe; 1n, a filler stripping section; 1n1, a filler section oil inlet pipe; 1n2, stripping section oil distributor; 1n3. Deodorizing filler; 1n4. Auxiliary gas phase channels; 1n5, arc baffle; 1n6, a filler section oil outlet pipe; 1p, a liquid seal overflow pipe; 1q, emptying the pipe; 2. a high pressure heating boiler; 3a, a first-stage distillate cooler; 3b, a secondary fraction cooler; 4. a vacuum pumping system; 5. then stripping the energy-saving tower; 5a, a vacuumizing port of the energy-saving tower; 5b, an oil inlet pipe of the energy-saving tower; 5c, an energy-saving tower oil distributor; 5d, energy-saving tower packing; 5e, an energy-saving tower heat exchanger; 5e1, an oil inlet to be deodorized; 5e2, an oil outlet to be deodorized; 5f, deodorizing the product oil; 5g, an antioxidant adding port; 5h, stripping the pump again; p1, a first conveying pump; p2, a second conveying pump; p3. a primary circulation pump; p4. a secondary circulation pump; F1. a valve I; F2. a second valve; F3. a third valve; F4. a valve IV; F5. a fifth valve; F6. a valve six; g1.ve output tube; G2. fatty acid output tube; G3. vacuumizing a deodorizing tower; G4. a high pressure steam inlet manifold; G5. a high pressure steam outlet header; G6. a direct steam pipe; G7. and vacuumizing the energy-saving tower.

Detailed Description

As shown in fig. 1 and 2, the grease deodorization system comprises a combined deodorization tower 1 and a re-gas stripping energy-saving tower 5, wherein the combined deodorization tower 1 comprises a cylindrical deodorization tower barrel, the upper part of the deodorization tower barrel is connected with a distillate collection tower communicated with the deodorization tower barrel, the top of the distillate collection tower is provided with a collection tower vacuumizing port 1a, and the collection tower vacuumizing port 1a is connected with a vacuumizing system 4 through a deodorization tower vacuumizing pipe G3; an oil heating pool 1j is arranged at the upper part of the inner cavity of the deodorizing tower cylinder, the oil heating pool 1j is coaxial with the deodorizing tower cylinder, an air flow channel is arranged between the inner wall of the deodorizing tower cylinder and the deodorizing tower cylinder, an oil heating pool oil outlet pipe 1j2 is connected to the upper part of the oil heating pool 1j, an oil heating pool oil inlet pipe 1j1 is arranged above the oil heating pool 1j, and the tail end of the oil heating pool oil inlet pipe 1j1 is inserted below an oil level line of the oil heating pool 1 j; a plate tower gas stripping section 1m is arranged below the oil heating pool 1j, the plate tower gas stripping section 1m comprises a multi-layer plate tower section tray device, the plate tower section tray device positioned at the top layer is connected with a plate tower section oil inlet pipe 1m1, and the plate tower section tray device positioned at the bottom layer is connected with a plate tower section oil outlet pipe 1m2; a packing gas stripping section 1n is arranged below the plate tower gas stripping section 1m, a packing section oil inlet pipe 1n1 is arranged above the packing gas stripping section 1n, and a packing section oil outlet pipe 1n6 is connected to the bottom of the deodorizing tower barrel.

The vegetable oil is heated to high temperature by an oil heating pool 1j, and is subjected to two-stage multistage gas stripping by a plate tower gas stripping section 1m and a filler gas stripping section 1n to remove free fatty acid, aldehyde, ketone, unsaturated hydrocarbon carbon compounds and other odor substances in the oil, and also to remove decomposition products, small molecular ring aromatic hydrocarbon and pesticide residues generated by improper mildew of peroxide and oil transportation and storage, and meanwhile, partial pigment can be destroyed in the high temperature process to decompose and remove the pigment; the stripped fraction is captured by the distillate capturing tower and output. The vacuum degree in the combined deodorizing tower 1 is maintained by the deodorizing tower vacuumizing tube G3, the plate tower gas stripping section 1m and the filler gas stripping section 1n realize double-section parallel steam extraction, the deodorizing whole process is always in a high vacuum environment, odor substances are removed, the smoke point and the stability of an oil product are improved, and the phenomenon that small molecules in the oil are polymerized at a high temperature to influence the quality of the oil is avoided.

Each plate tower Duan Dapan device comprises a tray 1m3 which cuts off the cross section of a cylinder body and is opened upwards, the oil level of a certain height is kept in each tray 1m3, stripping steam annular pipes 1m4 are respectively distributed at the bottom of each tray, each stripping steam annular pipe 1m4 is respectively connected with a direct steam pipe G6, a plurality of stripping pumps 1m5 are respectively and uniformly arranged on each stripping steam annular pipe 1m4, the upper end of each direct steam pipe G6 is respectively higher than the oil level line of the tray where the direct steam pipe G is positioned and extends out of the deodorizing tower cylinder body, the tray positioned at the upper layer is respectively provided with a liquid seal overflow pipe 1p, the upper port of each liquid seal overflow pipe 1p is lower than the oil level line of the tray where the liquid seal overflow pipe 1p is positioned, and the lower end of each liquid seal overflow pipe extends to below the oil level line of the tray positioned at the lower layer; the gas phase spaces among the tray devices of each laminate tower section are respectively communicated with each other through the central ventilation pipe 1m6 of the tray, the central ventilation pipe 1m6 of each tray is positioned right below the oil heating pool 1j, the upper end of the central ventilation pipe is higher than the oil level line of the tray where the central ventilation pipe is positioned, and the lower end of the central ventilation pipe is leveled with the bottom of the corresponding tray.

The high-temperature vegetable oil flows into a tray of a top plate tower section tray device from a plate tower section oil inlet pipe 1m1, a direct steam pipe G6 supplies high-temperature steam to each stripping pump 1m5 through a stripping steam ring pipe 1m4, and each stripping pump 1m5 carries out stripping removal on odor substances in the vegetable oil in the process of flowing the vegetable oil on the tray; vegetable oil on the upper tray flows into the next layer from the liquid seal overflow pipe 1p in sequence to continue gas stripping, fractions of each layer flow into the distillate capturing tower from the central vent pipe 1m6 of the tray, each gas stripping pump 1m5 plays an optimal stripping effect, and the retention time is controllable; because the retention time of the high-temperature vegetable oil on each layer of tray is longer, the pigment is decomposed and removed, and the decoloring effect is achieved.

The filler gas stripping section 1n comprises a filler layer cylinder coaxial with the deodorizing tower cylinder, deodorizing filler 1n3 is arranged in the inner cavity of the filler layer cylinder, a gas stripping section oil distributor 1n2 for uniformly distributing oil to the deodorizing filler 1n3 is arranged at the upper part of the inner cavity of the filler layer cylinder, and the total inlet of the gas stripping section oil distributor 1n2 is connected with the inner end of a filler section oil inlet pipe 1n 1; the packing layer cylinder is embedded in the center of the lower part of the plate tower air stripping section 1m, and the tray device of the two-layer plate tower section at the lowest part surrounds the periphery of the packing layer cylinder; a multi-layer filler section tray device is arranged below the deodorization filler 1n3.

The high-temperature vegetable oil enters from the oil inlet pipe 1n1 of the filler section, is distributed by the oil distributor 1n2 of the gas stripping section, and is uniformly scattered into the deodorizing filler 1n3, and the odorous substances such as free fatty acid and the like can be rapidly stripped due to the very large specific surface area of the vegetable oil in the deodorizing filler 1n 3; the packing layer cylinder is wrapped in the plate tower, so that the deodorizing packing 1n3 has no heat loss in the shell area, and the distilled substances such as the free fatty acid and the like which are extracted by gas cannot be condensed in the tower, thereby achieving the best integral stripping effect and reducing the grease hydrolysis loss; and the plant oil after the rapid gas stripping sequentially flows through the gas stripping of the tray device with the lower multilayer filling section. Because the resistance of the airflow channel above the deodorization filling material 1n3 is very small, the top of the filling material stripping section 1n is directly subjected to vacuum suction at the top of the tower, and the phenomenon that the vacuum degree of the plate tower section is insufficient due to the fact that the filling material layer is arranged on the upper part of the cylinder body is avoided. The deodorizing tower has the advantages of compact structure, no excessive gas phase pipelines, incapability of condensing distillate, higher capturing component of the subsequent distillate VE, low air extraction resistance, good system tightness and better vacuum in the tower.

As shown in fig. 4, an auxiliary gas phase channel 1n4 is arranged on the upper layer in the two-layer plate tower section tray device positioned on the periphery of the packing layer cylinder, the auxiliary gas phase channel 1n4 is formed by encircling the deodorizing tower cylinder and an arc-shaped baffle plate 1n5, the upper end of the arc-shaped baffle plate 1n5 is higher than the liquid level of the layer, the lower end of the arc-shaped baffle plate 1n5 is connected to the tray of the layer, and the auxiliary gas phase channel 1n4 penetrates through the tray of the layer. Because the packing layer cylinder is embedded in the trays of the two layers at the lowest part of the plate tower stripping section 1m, the auxiliary gas phase channel 1n4 is separated in the trays of the upper layers of the nested two layers through the arc-shaped baffle plate 1n5, and the timely extraction of the fraction stripped by the tray device of the layer at the lowest part of the plate tower stripping section 1m can be ensured, thereby improving the integral stripping effect.

As shown in fig. 3, two stripping steam ring pipes 1m4 are arranged in a tray, a plurality of stripping pumps 1m5 are respectively arranged on the two stripping steam ring pipes 1m4, an annular partition plate 1m7 is arranged between the two stripping steam ring pipes 1m4, a radial partition plate 1m8 is arranged between a tray center vent pipe 1m6 and a deodorizing tower cylinder body, and an overflow gap is reserved on one side of the intersection part of the annular partition plate 1m7 and the radial partition plate 1m8, so that grease flows in series along the inner side and the outer side of the annular partition plate 1m 7; the bottom of the tray is also provided with an annular steam jet pipe 1m9, and a plurality of injection holes which are inclined downwards along the annular steam jet pipe 1m9.

The stripping pumps 1m5 are distributed with the stripping steam ring pipe 1m4 in the tray, so that on one hand, the stripping strength is improved, on the other hand, in each layer of tray, due to the separation of the annular baffle plate 1m7 and the radial baffle plate 1m8, vegetable oil flows through the whole circumference of the inner circumference of the tray, then flows into the outer circumference of the tray from the overflow notch of the annular baffle plate 1m7 and flows through the whole circumference of the outer circumference, and thus the vegetable oil sequentially flows through each stripping pump on the inner ring and then sequentially flows through each stripping pump on the outer ring; the next layer sequentially flows through each stripping pump on the outer ring and then sequentially flows through each stripping pump on the inner ring, so that the flowing distance of vegetable oil on each tray is prolonged, and the stripping strength of each layer is greatly improved. In addition, the steam is sprayed from the spray holes of the annular steam spray pipe 1m9, and the vegetable oil is stirred and stripped.

The top of the distillate collecting tower is provided with a silk screen collector 1b, a two-stage distillate collecting device is arranged below the silk screen collector 1b, each distillate collecting device comprises a fraction distributor 1d, and the inlet of each fraction distributor 1d is connected with a fraction inlet pipe 1 c; the lower part of each fraction distributor 1d is provided with a trapping tower filler 1e respectively, the lower center of each trapping tower filler 1e is provided with a liquid blocking cover 1f respectively, the lower part of each liquid blocking cover 1f is provided with a liquid receiving disc 1g respectively, the periphery of each liquid receiving disc 1g is connected to the inner wall of the slip trapping tower respectively, the center of each liquid receiving disc 1g is provided with a liquid receiving disc central gas permeability pipe penetrating upwards respectively, and each liquid blocking cover 1f covers the upper part of the liquid receiving disc central gas permeability pipe respectively; the bottom of each liquid receiving disc 1g is respectively connected with a deodorizing fraction outlet pipe 1h; the outlet pipe 1h of each deodorization fraction is respectively connected with the inlet of a circulating pump, the outlet of the circulating pump is respectively connected with the inlet of a fraction cooler, and the outlet of the fraction cooler is respectively connected with the fraction inlet pipe 1c of the stage; the outlets of the fraction coolers are also respectively connected with a deodorizing fraction output pipe.

When the gas stripping distillate upwards flows through the first-stage distillate collecting device, VE is collected in the first-stage collecting tower filler, condensed VE falls into the first-stage liquid receiving disc, is pumped out by the first-stage circulating pump P3, is cooled by the first-stage fraction cooler 3a, returns to the first-stage fraction inlet pipe, is distributed by the first-stage fraction distributor and then circularly sprays to the first-stage collecting tower filler, and redundant VE is output from the VE output pipe G1. When the gas stripping distillate upwards flows through the secondary distillate collecting device again, fatty acid is collected in the secondary collecting tower filler, condensed fatty acid falls into a secondary liquid receiving disc, is pumped out by a secondary circulating pump P4, is cooled by a secondary fraction cooler 3b, returns to a secondary fraction inlet pipe, is distributed by a secondary fraction distributor and is circularly sprayed to the secondary collecting tower filler, and redundant fatty acid is output from a fatty acid output pipe G2. Thus, the VE and fatty acid are independently recovered, the purity is high, and the subsequent comprehensive utilization is convenient.

As shown in fig. 5 and 6, the inner cavity of the oil heating pool 1j is divided into a plurality of oil pool heating cavities by an oil heating pool partition plate 1j3 extending along the radial direction, each oil pool heating cavity is respectively inserted with a U-shaped heating tube bundle 1j4, the inlet of each U-shaped heating tube bundle 1j4 is respectively connected with a high-pressure steam inlet main pipe G4, and the outlet of each U-shaped heating tube bundle 1j4 is respectively connected with a high-pressure steam outlet main pipe G5; the inlet of the high-pressure heating boiler 2 of the high-pressure steam outlet main pipe G5 is connected, and the outlet of the high-pressure heating boiler 2 is connected with the high-pressure steam inlet main pipe G4; one end of each oil heating tank baffle plate 1j3 is connected with the cylinder wall of the oil heating tank, an overflow gap is reserved between the other end of each oil heating tank baffle plate and the cylinder wall, and the overflow gaps of the adjacent oil heating tank baffle plates 1j3 are sequentially staggered to enable the heating cavities of the adjacent oil heating tanks to be sequentially connected in series; the bottom of each oil pool heating cavity is provided with a stirring steam pipe 1j6 respectively; a plurality of tube bundle baffles 1j5 extending vertically are arranged along the length direction of each U-shaped heating tube bundle 1j4, and adjacent tube bundle baffles 1j5 are staggered in sequence in the height direction.

Heating vegetable oil to high temperature by utilizing heat energy of high-pressure steam, wherein the vegetable oil is repeatedly folded and flowed in the up-down direction under the separation and guide of a tube bundle partition board 1j5 in each oil pool heating cavity; then under the separation and the direction of oil heating pond baffle 1j3, adjacent oil pond heating chamber establishes ties in proper order for vegetable oil is turned back and flows many times in the fore-and-aft direction again, has prolonged the heated time of vegetable oil so greatly, makes U-shaped heating tube bank 1j4 and vegetable oil's heat exchange efficiency high, and stirring steam that stirring steam pipe 1j6 released makes the temperature of vegetable oil more even. While making the oil heating tank 1j easy to modular and standardized to manufacture.

The bottom of the oil heating pool 1j and the bottom of the tray are respectively connected with an emptying pipe 1q, and each emptying pipe 1q is respectively communicated with an oil storage space of the lower tray through an emptying valve. By opening the drain valve of one layer, the oil of the tray of the layer can directly flow into the next layer, so that the number of layers of the tray deodorization device which is actually put into use can be adjusted according to the requirement.

As shown in fig. 7, an energy-saving tower vacuumizing port 5a is arranged at the top of the re-stripping energy-saving tower 5, an energy-saving tower oil inlet pipe 5b is arranged at the upper part of the inner cavity of the re-stripping energy-saving tower 5, an energy-saving tower oil distributor 5c is arranged below the energy-saving tower oil inlet pipe 5b, an energy-saving tower filler 5d is arranged below the energy-saving tower oil distributor 5c, an energy-saving tower heat exchanger 5e is arranged below the energy-saving tower filler 5d, an oil inlet 5e1 to be deodorized is arranged at the lower part of the shell side of the energy-saving tower heat exchanger 5e, an oil outlet 5e2 to be deodorized is arranged at the upper part of the shell side of the energy-saving tower heat exchanger 5e, a deodorization product oil tank is connected below the lower tube plate of the energy-saving tower heat exchanger 5e, a re-stripping pump 5h is arranged in the inner cavity of the deodorization product oil tank, the stripping pump is connected with a direct steam pipe G6, an antioxidant adding port 5G is arranged on the side wall of the deodorization product oil tank, and a deodorization product oil outlet 5f is arranged at the bottom of the deodorization product oil tank.

The tail end of the deodorization system is provided with a re-gas stripping energy-saving tower 5, high-temperature vegetable oil flowing out from a plate tower section oil outlet pipe 1m2 or a filler section oil outlet pipe 1n6 of the combined deodorization tower 1 enters an energy-saving tower oil inlet pipe 5b, enters an energy-saving tower oil distributor 5c to uniformly distribute liquid, enters an energy-saving tower filler 5d to carry out re-gas stripping, improves the stability, flavor and quality of the finished oil, then enters an energy-saving tower heat exchanger 5e to preheat fresh oil to be deodorized, fully recovers heat, and finally the finished oil is discharged from a deodorization finished oil outlet 5f at the bottom of a deodorization finished oil tank. Depending on the oil product, the re-stripping pump may be started for 5 hours or an antioxidant may be added to the finished oil through an antioxidant addition port 5g.

The outlet 5e2 of the oil to be deodorized is connected with the inlet of the oil inlet pipe 1j1 of the oil heating tank, the outlet of the oil outlet pipe 1j2 of the oil heating tank is connected with a valve I F1 and a valve II F2 in parallel, the outlet of the valve I F1 is connected with the oil inlet pipe 1m1 of the plate tower section, and the outlet of the valve II F2 is connected with the oil inlet pipe 1n1 of the filler section; the oil outlet pipe 1m2 of the plate tower section is connected with the inlet of the first conveying pump P1, the outlet of the first conveying pump P1 is connected with a valve III F3 and a valve IV F4 in parallel, the outlet of the valve III F3 is connected with the oil inlet pipe 1n1 of the filling section, and the outlet of the valve IV F4 is connected with the inlet of the oil inlet pipe 5b of the energy-saving tower; the oil outlet pipe 1n6 of the filling section is connected with the inlet of the second conveying pump P2, the outlet of the second conveying pump P2 is connected with a valve five F5 and a valve six F6 in parallel, the outlet of the valve five F5 is connected with the inlet of the oil inlet pipe 5b of the energy-saving tower, and the outlet of the valve six F6 is connected with the oil inlet pipe 1m1 of the plate tower section; the energy-saving tower vacuumizing port 5a is connected with the vacuumizing system 4 through an energy-saving tower vacuumizing tube G7.

The plant oil way runoff Cheng Linghuo in the deodorization process is adjustable, and has strong adaptability and adjustability aiming at the characteristics of different oils; the vegetable oil with high unsaturated fatty acid content is easy to hydrolyze in the deodorization process, the valve I F1, the valve III F3 and the valve V F5 are opened, the valve II F2, the valve IV F4 and the valve V F6 are closed, the vegetable oil firstly enters the stripping section of the plate tower for 1m, the time of the high-temperature process is longer, the pigment is completely decomposed, the decolorization effect of the vegetable oil is ensured, and the odor substances are removed to the greatest extent; then enters a packing stripping section 1n, so that hydrolytic substances generated in the plate tower stripping section 1m can be stripped rapidly, and the integral decolorization and deodorization effects are ensured. For the vegetable oil with high acid value and high free fatty acid content, the valve II F2, the valve IV F4 and the valve VI F6 are opened, the valve I F1, the valve III F3 and the valve V F5 are closed, so that the vegetable oil firstly enters the filler stripping section 1n, the free fatty acid can be stripped rapidly, the steam consumption of unit yield is low, and then enters the plate tower stripping section 1m, and the integral decolorization and deodorization effects are ensured.

The foregoing description is only of a preferred embodiment of the invention and is not intended to limit the scope of the invention. In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention. The technical features of the present invention that are not described may be implemented by or using the prior art, and are not described herein.

Claims

1. The utility model provides a grease deodorization system, includes combination formula deodorization tower and gas stripping economizer tower again, combination formula deodorization tower includes cylindric deodorization tower barrel, its characterized in that: the upper part of the deodorizing tower cylinder is connected with a distillate collecting tower communicated with the deodorizing tower cylinder, the top of the distillate collecting tower is provided with a collecting tower vacuumizing port, and the collecting tower vacuumizing port is connected with a vacuumizing system through a deodorizing tower vacuumizing pipe; the upper part of the inner cavity of the deodorizing tower cylinder is provided with an oil heating pool, the oil heating pool and the deodorizing tower cylinder are coaxial, an air flow channel is arranged between the oil heating pool and the inner wall of the deodorizing tower cylinder, the upper part of the oil heating pool is connected with an oil outlet pipe of the oil heating pool, the upper part of the oil heating pool is provided with an oil inlet pipe of the oil heating pool, and the tail end of the oil inlet pipe of the oil heating pool is inserted below the oil level line of the oil heating pool; a plate tower gas stripping section is arranged below the oil heating pool and comprises a multi-layer plate tower section tray device, the plate tower section tray device positioned at the top layer is connected with a plate tower section oil inlet pipe, and the plate tower section tray device positioned at the bottom layer is connected with a plate tower section oil outlet pipe; a packing gas stripping section is arranged below the plate tower gas stripping section, a packing section oil inlet pipe is arranged above the packing gas stripping section, and the bottom of the deodorizing tower barrel body is connected with a packing section oil outlet pipe;

each plate tower Duan Dapan device comprises a tray which cuts off the cross section of a cylinder body and is opened upwards, an oil level with a certain height is kept in each tray, stripping steam annular pipes are respectively distributed at the bottom of each tray, each stripping steam annular pipe is respectively connected with a direct steam pipe, a plurality of stripping pumps are respectively and uniformly arranged on each stripping steam annular pipe, the upper end of each direct steam pipe is respectively higher than the oil level line of the tray on which the corresponding stripping steam pipe is positioned and extends out of the cylinder body of the deodorizing tower, each tray on the upper layer is respectively provided with a liquid seal overflow pipe, the upper port of each liquid seal overflow pipe is lower than the oil level line of the tray on which the corresponding stripping steam annular pipe is positioned, and the lower end of each liquid seal overflow pipe extends below the oil level line of the tray on the lower layer; the gas phase spaces among the tray devices of each laminate tower section are respectively communicated with each other through a tray center vent pipe, the tray center vent pipe is positioned right below the oil heating pool, the upper end of the tray center vent pipe is higher than the oil level line of the tray where the tray is positioned, and the lower end of the tray center vent pipe is leveled with the bottom of the corresponding tray;

the top of the re-gas stripping energy-saving tower is provided with an energy-saving tower vacuumizing port, the upper part of the inner cavity of the re-gas stripping energy-saving tower is provided with an energy-saving tower oil inlet pipe, the lower part of the energy-saving tower oil inlet pipe is provided with an energy-saving tower oil distributor, the lower part of the energy-saving tower oil distributor is provided with an energy-saving tower filler, the lower part of the shell side of the energy-saving tower heat exchanger is provided with an oil inlet to be deodorized, the upper part of the shell side of the energy-saving tower heat exchanger is provided with an oil outlet to be deodorized, the lower part of a lower tube plate of the energy-saving tower heat exchanger is connected with a deodorization product tank, the inner cavity of the deodorization product tank is provided with a re-gas stripping pump, the re-gas stripping pump is connected with a direct steam pipe, the side wall of the deodorization product tank is provided with an antioxidant adding port, and the bottom of the deodorization product tank is provided with a deodorization product oil outlet.

2. The grease deodorization system of claim 1, wherein: the filler gas stripping section comprises a filler layer cylinder coaxial with the deodorizing tower cylinder, deodorizing filler is arranged in the inner cavity of the filler layer cylinder, a gas stripping section oil distributor for uniformly distributing oil to the deodorizing filler is arranged at the upper part of the inner cavity of the filler layer cylinder, and the total inlet of the gas stripping section oil distributor is connected with the inner end head of the filler section oil inlet pipe; the packing layer cylinder body is embedded in the center of the lower part of the plate tower gas stripping section, and the tray device of the two-layer plate tower section at the lowest part surrounds the periphery of the packing layer cylinder body; and a multi-layer filler section tray device is arranged below the deodorizing filler.

3. The grease deodorization system of claim 2, wherein: the upper layer in the two-layer plate tower section tray device positioned at the periphery of the packing layer cylinder body is provided with an auxiliary gas phase channel, the auxiliary gas phase channel is formed by encircling the deodorizing tower cylinder body and the arc-shaped baffle plate, the upper end of the arc-shaped baffle plate is higher than the liquid level of the layer, the lower end of the arc-shaped baffle plate is connected to the tray of the layer, and the auxiliary gas phase channel penetrates through the tray of the layer.

4. The grease deodorization system of claim 2, wherein: the gas stripping steam ring pipes are arranged in the tray, a plurality of gas stripping pumps are respectively arranged on the two gas stripping steam ring pipes, an annular partition plate is arranged between the two gas stripping steam ring pipes, a radial partition plate is arranged between a gas permeability pipe at the center of the tray and the deodorizing tower cylinder, and an overflow gap is reserved on one side of the intersection part of the annular partition plate and the radial partition plate, so that grease flows in series along the inner side and the outer side of the annular partition plate; the bottom of the tray is also provided with an annular steam jet pipe, and a plurality of downward-inclined jet holes are respectively arranged along the annular steam jet pipe.

5. The grease deodorization system of claim 1, wherein: the top of the distillate collecting tower is provided with a silk screen collector, a two-stage distillate collecting device is arranged below the silk screen collector, each distillate collecting device comprises a fraction distributor, and an inlet of each fraction distributor is connected with a fraction inlet pipe; the lower part of each fraction distributor is provided with a trapping tower filler, the lower center of each trapping tower filler is provided with a liquid blocking cover, the lower part of each liquid blocking cover is provided with a liquid receiving disc, the periphery of each liquid receiving disc is respectively connected to the inner wall of the slip trapping tower, the center of each liquid receiving disc is respectively provided with a liquid receiving disc center vent pipe penetrating upwards, and each liquid blocking cover is respectively covered above the liquid receiving disc center vent pipe; the bottom of each liquid receiving disc is respectively connected with a deodorizing fraction outlet pipe; the outlet pipe of each deodorizing fraction is respectively connected with the inlet of a circulating pump, the outlet of the circulating pump is respectively connected with the inlet of a fraction cooler, and the outlet of the fraction cooler is respectively connected with the fraction inlet pipe of the stage; the outlets of the fraction coolers are also respectively connected with a deodorizing fraction output pipe.

6. The grease deodorization system of claim 1, wherein: the inner cavity of the oil heating pool is divided into a plurality of oil pool heating cavities by oil heating pool partition plates extending along the radial direction, U-shaped heating tube bundles are respectively inserted into the oil pool heating cavities, the inlet of each U-shaped heating tube bundle is respectively connected with a high-pressure steam inlet main pipe, and the outlet of each U-shaped heating tube bundle is respectively connected with a high-pressure steam outlet main pipe; the high-pressure steam outlet main pipe is connected with an inlet of a high-pressure heating boiler, and an outlet of the high-pressure heating boiler is connected with the high-pressure steam inlet main pipe; one end of each oil heating pool partition board is connected with the cylinder wall of the oil heating pool, an overflow gap is reserved between the other end of each oil heating pool partition board and the cylinder wall, and the overflow gaps of the adjacent oil heating pool partition boards are sequentially staggered to enable the heating cavities of the adjacent oil heating pools to be sequentially connected in series; the bottom of each oil pool heating cavity is provided with a stirring steam pipe respectively; a plurality of tube bundle baffles which extend vertically are arranged along the length direction of each U-shaped heating tube bundle, and adjacent tube bundle baffles are staggered in sequence in the height direction.

7. The grease deodorization system of claim 2, wherein: the bottom of the oil heating pool and the bottom of the tray are respectively connected with an emptying pipe, and each emptying pipe is respectively communicated with an oil storage space of the lower tray through an emptying valve.

8. The grease deodorization system of claim 1, wherein: the outlet of the valve I is connected with the oil inlet pipe of the plate tower section, and the outlet of the valve II is connected with the oil inlet pipe of the filler section; the oil outlet pipe of the plate tower section is connected with the inlet of the first conveying pump, the outlet of the first conveying pump is connected with a valve III and a valve IV in parallel, the outlet of the valve III is connected with the oil inlet pipe of the filling section, and the outlet of the valve IV is connected with the inlet of the oil inlet pipe of the energy-saving tower; the oil outlet pipe of the filling section is connected with the inlet of the second conveying pump, the outlet of the second conveying pump is connected with a valve five and a valve six in parallel, the outlet of the valve five is connected with the inlet of the oil inlet pipe of the energy-saving tower, and the outlet of the valve six is connected with the oil inlet pipe of the plate tower section; the energy-saving tower vacuumizing port is connected with the vacuumizing system through an energy-saving tower vacuumizing pipe.