CN114797409A - Slurry spraying system for wet desulphurization and integrative tower of wet desulphurization and chimney - Google Patents
Slurry spraying system for wet desulphurization and integrative tower of wet desulphurization and chimney Download PDFInfo
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- CN114797409A CN114797409A CN202210469554.0A CN202210469554A CN114797409A CN 114797409 A CN114797409 A CN 114797409A CN 202210469554 A CN202210469554 A CN 202210469554A CN 114797409 A CN114797409 A CN 114797409A
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- 238000005507 spraying Methods 0.000 title claims abstract description 90
- 239000002002 slurry Substances 0.000 title claims abstract description 67
- 239000007921 spray Substances 0.000 claims abstract description 59
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 49
- 230000023556 desulfurization Effects 0.000 claims abstract description 49
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003546 flue gas Substances 0.000 claims abstract description 37
- 235000019738 Limestone Nutrition 0.000 claims abstract description 26
- 239000006028 limestone Substances 0.000 claims abstract description 26
- 239000000428 dust Substances 0.000 claims description 16
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 239000012717 electrostatic precipitator Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 claims description 3
- 239000012716 precipitator Substances 0.000 claims description 2
- 230000003009 desulfurizing effect Effects 0.000 abstract description 19
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 31
- 238000000034 method Methods 0.000 description 8
- 238000007791 dehumidification Methods 0.000 description 6
- 239000010440 gypsum Substances 0.000 description 6
- 229910052602 gypsum Inorganic materials 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 4
- 238000006276 transfer reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 229910052815 sulfur oxide Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a slurry spraying system for wet desulphurization and a desulphurization wet chimney integrated tower, wherein the slurry spraying system comprises: the interior of the spraying main pipes is suitable for conveying limestone slurry; one end of the spray branch pipe is connected with the spray main pipe, and the other end of the spray branch pipe is connected with a nozzle; the nozzle is suitable for spraying the limestone slurry downwards; along vertical downward direction, the cross-section that sprays the main pipe is the fusiformis, the major axis of fusiformis is along vertical direction, the minor axis of fusiformis is along horizontal direction. So set up, with the major axis of fusiformis along vertical direction for it is the same with the flue gas flow direction to spray the major axis of being responsible for, and is perpendicular with the minor axis of fusiformis and flue gas velocity of flow simultaneously, under this arrangement, has reduced the resistance that the flue gas flows and has sprayed the wearing and tearing of the windward side of being responsible for, has optimized the flow field of flue gas, has reduced the whole energy consumption of desulfurizing tower, has increased the efficiency of mass transfer, thereby has improved the desulfurization efficiency of desulfurizing tower.
Description
Technical Field
The invention relates to the technical field of desulfurizing towers, in particular to a slurry spraying system for wet desulfurization and a desulfurizing wet chimney-removing integrated tower.
Background
The mainstream desulfurization method of the coal-fired power plant adopts a limestone-gypsum method, and a desulfurization tower is one of main devices for wet desulfurization. The diameter of a desulfurizing tower of a million units can often reach about 19.6m, a spraying layer is usually arranged and sprayed in the desulfurizing tower, a spraying system is arranged in the spraying layer, and the spraying system on each spraying layer sprays limestone slurry into the desulfurizing tower through a slurry spraying main pipe. The limestone slurry sprayed downwards and the flue gas flow discharged upwards carry out mass transfer reaction to generate gypsum, thereby achieving the purpose of removing sulfur oxides from the flue gas.
At present, two slurry spraying main pipes with the diameter of 0.9m are required to be arranged in a spraying system of each spraying layer. The slurry spraying main pipe is generally a pipeline with a circular section, the downward projection area of a single main pipe reaches 17.64 square meters, and the sum of the projection areas of the two main pipes reaches 35.28 square meters in each layer. Therefore, the area of the single-layer slurry spraying main pipe accounts for about 11.7 percent of the total section of the desulfurizing tower.
The large projection area of the pipeline increases the overall operation resistance of the desulfurizing tower, reduces the mass transfer efficiency, reduces the system efficiency and increases the system energy consumption.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is that the projection area of the slurry spraying main pipe is large and the resistance of the whole operation of the desulfurization tower is increased in the prior art, so that a slurry spraying system for wet desulfurization and a desulfurization and moisture removal chimney integrated tower are provided.
In order to achieve the above object, an embodiment of the present invention provides a slurry spraying system for wet desulphurization, including: the interior of the spraying main pipes is suitable for conveying limestone slurry; one end of the spray branch pipe is connected with the spray main pipe, and the other end of the spray branch pipe is connected with a nozzle; the nozzle is suitable for downwards spraying the limestone slurry; along vertical downward direction, the cross-section that sprays the main pipe is the fusiformis, the major axis of fusiformis is along vertical direction, the minor axis of fusiformis is along horizontal direction.
Optionally, the ratio of the major axis to the minor axis is between 1.05 and 20.
Optionally, the ratio of the major axis to the minor axis is between 1.5 and 3.
Optionally, a plurality of the spraying main pipes are arranged at intervals.
The embodiment of the invention also provides a desulfurization and dehumidification chimney integrated tower, which comprises: the tower body and spray the layer, spray the layer and set up in the tower body, spray the layer including the thick liquid spraying system of any one of above-mentioned embodiment.
Optionally, the desulfurization and moisture removal chimney integral tower further comprises: the tray is arranged below the spraying layer; and the slurry pool is arranged at the bottom of the tower body.
Optionally, the desulfurization and moisture removal chimney integral tower further comprises: the flue gas inlet is formed in the tower body; the flue gas inlet is positioned between the slurry tank and the spraying layer; the chimney is arranged at the top of the tower body; and a flue gas outlet is formed in the top of the chimney.
Optionally, the desulfurization and moisture removal chimney integral tower further comprises: the wet electric dust collector is arranged in the tower body; the wet-type electrostatic precipitator is located spray the layer with between the exhanst gas outlet.
Optionally, the desulfurization and dehumidification chimney integral tower further comprises: the demister is arranged in the tower body; the demister is arranged between the spraying layer and the flue gas outlet.
Optionally, the desulfurization and moisture removal chimney integral tower further comprises: the lower reducing section is arranged between the demister and the wet electric dust collector; the diameter of the tower body positioned at the lower reducing section is gradually reduced along the vertical downward direction; the air flow uniform distribution plate is arranged on the lower reducing section; and/or the upper reducing section is arranged between the chimney and the wet electric dust collector; the diameter of the tower body positioned at the upper reducing section is gradually increased along the vertical downward direction.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the embodiment of the invention provides a slurry spraying system for wet desulphurization, which comprises: the interior of the spraying main pipes is suitable for conveying limestone slurry; one end of the spray branch pipe is connected with the spray main pipe, and the other end of the spray branch pipe is connected with a nozzle; the nozzle is suitable for spraying the limestone slurry downwards; along vertical downward direction, the cross-section that sprays the main pipe is the fusiformis, the major axis of fusiformis is along vertical direction, the minor axis of fusiformis is along horizontal direction.
So set up, be responsible for through spraying with the fusiformis cross-section and replace circular cross-section spray and be responsible for, under the condition that flow area and wall thickness are equal completely, make the delivery flow of lime stone thick liquid unchangeable, guaranteed the whole spraying effect of desulfurizing tower. Meanwhile, the long axis of the shuttle shape is arranged along the vertical direction, so that the long axis of the spraying main pipe is the same as the flowing direction of the flue gas, and the short axis of the shuttle shape is vertical to the flow velocity of the flue gas. Meanwhile, the resisting moment and the inertia moment of the spraying main pipe on the section are obviously increased, the bending resistance bearing capacity of the spraying main pipe is obviously improved, and the deflection is smaller. And the design of fusiform cross-section can also prevent to spray and have ponding in the outside bottom of being responsible for, has prolonged the life who sprays and be responsible for.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for a worker of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic view of the internal structure of a chimney-integrating tower for removing sulfur and moisture according to an embodiment of the present invention;
FIG. 2 is a schematic view of the internal cross-section of a desulfurization, moisture removal and chimney integrated tower according to an embodiment of the present invention.
Reference numerals:
1. a tower body; 2. a chimney; 3. a demisting layer; 4. a slurry spray system; 41. spraying a main pipe; 42. spraying branch pipes; 43. a nozzle; 5. a tray; 6. a flue gas inlet; 7. a slurry tank; 8. a wet electric precipitator; 9. an upper reducer section; 10. an air flow uniform distribution plate; 11. a lower reducer section.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a worker skilled in the art without creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases by a worker of ordinary skill in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The mainstream desulfurization method of the coal-fired power plant adopts a limestone-gypsum method, and a desulfurization tower is one of main devices for wet desulfurization. The diameter of a desulfurizing tower of a million units can often reach about 19.6m, a spraying layer is usually arranged and sprayed in the desulfurizing tower, a spraying system is arranged in the spraying layer, and the spraying system on each spraying layer sprays limestone slurry into the desulfurizing tower through a slurry spraying main pipe. The limestone slurry sprayed downwards and the flue gas flow discharged upwards carry out mass transfer reaction to generate gypsum, thereby achieving the purpose of removing sulfur oxides from the flue gas.
At present, two slurry spraying main pipes with the diameter of 0.9m are required to be arranged in a spraying system of each spraying layer. The slurry spraying main pipe is generally a pipeline with a circular section, the downward projection area of a single main pipe reaches 17.64 square meters, and the sum of the projection areas of the two main pipes reaches 35.28 square meters in each layer. Therefore, the area of the single-layer slurry spraying main pipe accounts for about 11.7 percent of the total section of the desulfurizing tower. The large projection area of the pipeline increases the overall operation resistance of the desulfurizing tower, reduces the mass transfer efficiency, reduces the system efficiency and increases the system energy consumption.
Therefore, the technical problem to be solved by the invention is that the projection area of the slurry spraying main pipe is large and the resistance of the whole operation of the desulfurization tower is increased in the prior art, so that the slurry spraying system for wet desulfurization and the desulfurization and wet-removal chimney integrated tower are provided.
Example 1
As shown in fig. 1 to 2, the embodiment of the present invention provides a slurry spraying system for wet desulfurization and a desulfurization and moisture removal chimney integrated tower, wherein the slurry spraying system 4 includes a plurality of main spray pipes 41 and branch spray pipes 42.
In a wet desulfurization system, a desulfurization tower is a key device. The spraying main pipe 41 is adapted to convey limestone slurry, one end of the spraying branch pipe 42 is connected to the spraying main pipe 41, the other end of the spraying branch pipe 42 is connected to a nozzle 43, and the nozzle 43 is adapted to spray the limestone slurry downwards. In the desulfurization process, the slurry spraying system 4 firstly conveys limestone slurry to each spraying branch pipe 42 through a main desulfurization slurry pipe, then conveys the limestone slurry to the nozzles 43 from the spraying branch pipes 42, sprays the limestone slurry downwards through the nozzles 43, and performs mass transfer reaction on the downwards sprayed limestone slurry and the upwards flue gas flow to generate gypsum, so that the aim of removing sulfur oxides in the flue gas is fulfilled. In the embodiment of the present invention, the cross section of the main spray pipe 41 is in an elliptical shape in a vertically downward direction, the major axis of the elliptical shape is in a vertical direction, and the minor axis of the elliptical shape is in a horizontal direction.
So set up, through being responsible for 41 replacing the spraying of circular cross section with the spraying of oval cross section and being responsible for 41, under the circumstances that flow area and wall thickness are equal completely for the delivery flow of lime stone thick liquid is unchangeable, has guaranteed the whole spraying effect of desulfurizing tower. Meanwhile, the oval long axis is arranged in the vertical direction, so that the long axis of the spraying main pipe 41 is identical to the flowing direction of the flue gas, and the oval short axis is perpendicular to the flow velocity of the flue gas. Meanwhile, the resisting moment and the inertia moment of the spraying main pipe 41 on the cross section are obviously increased, the bending resistance bearing capacity of the spraying main pipe 41 is obviously improved, and the deflection is smaller. Moreover, due to the design of the oval section, water accumulation at the bottom of the outer side of the spraying main pipe 41 can be prevented, and the service life of the spraying main pipe 41 is prolonged.
Further, in an alternative embodiment of the invention, the ratio of the major axis to the minor axis is between 1.05 and 20. The technical scheme of the invention is to change the originally designed pipeline with the circular cross section into the pipeline with the elliptical cross section through equivalent flow area conversion. According to the principle of equal flow area, the ratio of the major axis to the minor axis of the oval pipeline can be adjusted according to the requirements of the process and the structure, and the value range is 1.05-20. Preferably, the ratio of the major axis to the minor axis is between 1.5 and 3. When the ratio of the major axis to the minor axis is between 1.5 and 3, compared with other ratios, the method is convenient for factory processing and manufacturing, and can facilitate technicians to install the main spray pipe 41 in the desulfurization tower.
Further, in an optional embodiment of the present invention, a plurality of the main spray pipes 41 are arranged at intervals. Of course, as a preferred embodiment, a plurality of the main spray pipes 41 may be uniformly arranged at certain intervals.
Taking a million units as an example, the diameter of the desulfurizing tower is 19.6m in the original design, and each layer of slurry spraying system 4 is provided with two spraying main pipes 41 with the diameter of 0.9 m. The main spray pipe 41 is changed into an elliptical main spray pipe 41, and the main spray pipe 41 with the minor axis of 0.6m is selected according to the principle of equal flow area, and the major axis can be calculated according to the equal area. After the oval main spray pipe 41 is changed, the windward area of the main spray pipe 41 of the single-layer slurry spray system 4 is 23.52 square meters, and the windward area accounts for 7.8 percent of the sectional area of the desulfurizing tower, which is reduced by 3.9 percent compared with the original design. The windward area is reduced by 19.5 percent according to the calculation that 5 layers of spraying heartache are usually arranged in the desulfurizing tower. Therefore, it can be considered that the resistance of the desulfurization tower system is reduced by 19.5% in the slurry spray system 4, so that the overall performance of the desulfurization tower is greatly improved.
The invention provides a desulfurization and dehumidification chimney integrated tower which comprises a tower body 1 and a spraying layer, wherein the spraying layer is arranged in the tower body 1, and the spraying layer comprises a slurry spraying system 4 in any embodiment. In embodiments of the invention, the spray level may include a plurality of slurry spray systems 4.
Further, in an optional embodiment of the present invention, the desulfurization and moisture removal chimney integral tower further comprises a tray 5 and a slurry pool 7. The tray 5 is arranged below the spraying layer, and the slurry pool 7 is arranged at the bottom of the tower body 1. The desulfurization and dehumidification chimney integrated tower further comprises a flue gas inlet 6 and a chimney 2. Specifically, flue gas entry 6 is seted up on tower body 1, flue gas entry 6 is located thick liquid pond 7 with spray between the layer, chimney 2 sets up the top of tower body 1, the exhanst gas outlet has been seted up at the top of chimney 2.
Further, in an optional embodiment of the present invention, the desulfurization and moisture removal chimney integrated tower further includes a wet electric dust collector 8 and a demisting layer 3, the wet electric dust collector 8 is disposed in the tower body 1, and the wet electric dust collector 8 is located between the spraying layer and the flue gas outlet. The demisting layer 3 is arranged in the tower body 1, and the demisting layer 3 is arranged between the spraying layer and the smoke outlet. Specifically, a demister is arranged in the demisting layer 3.
In order to meet the requirement of ultralow emission, the flue gas after desulfurization enters a wet electric dust collector 8, and dust in the flue gas is further removed. The wet-type electric dust remover 8 is directly arranged at the top of the integrated tower of the desulfurization and dehumidification chimney, the construction land can be saved, the flue gas directly enters the wet-type electric dust remover 8 after desulfurization, the flow is shorter, the flow resistance of the flue gas in the integrated tower of the desulfurization and dehumidification chimney is smaller, and the desulfurization and dust removal efficiency can be further improved. The wet electric dust collector 8 comprises a power supply system, a cathode system, an anode system and a supporting truss thereof, wherein the cathode system and a water spraying system are arranged above the anode system. Power supply system is arranged at the top of wet-type electrostatic precipitator 8, and power supply system includes insulator, high voltage power supply and overhauls the platform. The flue gas is discharged from the side after passing through the wet electric dust collector 8.
Further, in an optional embodiment of the present invention, the desulfurization and moisture removal chimney integral tower further comprises an upper reducer section 9, a lower reducer section 11 and an air flow distribution plate 10. Specifically, the lower reducing section 11 is arranged between the demister and the wet electric dust collector 8, and the diameter of the tower body 1 located on the lower reducing section 11 is gradually reduced along the vertical downward direction. The air current equipartition board 10 sets up reducing section 11 down can make the air current that gets into wet-type electrostatic precipitator 8 more even. Go up reducing section 9 and set up chimney 2 with between the wet-type electrostatic precipitator 8, along vertical decurrent direction, be located go up reducing section 9 the diameter of tower body 1 grow gradually.
Of course, a person skilled in the art may add or delete the upper variable diameter section 9 and the lower variable diameter section 11 according to actual situations, and this embodiment is merely an example, but not limited thereto, and may achieve the same technical effect.
In a wet desulphurization system, a desulphurization, wet removal and chimney integrated tower is key equipment. The spraying main pipe 41 is adapted to convey limestone slurry, one end of the spraying branch pipe 42 is connected to the spraying main pipe 41, the other end of the spraying branch pipe 42 is connected to a nozzle 43, and the nozzle 43 is adapted to spray the limestone slurry downwards. In the desulfurization process, the slurry spraying system 4 firstly conveys the limestone slurry to each spraying branch pipe 42 through the main desulfurization slurry pipeline, then conveys the limestone slurry to the spray nozzles 43 from the spraying branch pipes 42, sprays the limestone slurry downwards through the spray nozzles 43, and performs mass transfer reaction on the limestone slurry sprayed downwards and upward flue gas flow to generate gypsum, so that the aim of removing sulfur oxide in the flue gas is fulfilled. The flue gas passes through the demister after being sprayed and desulfurized to remove moisture and then reaches the top, and is discharged from a flue gas outlet on the side surface.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Variations and modifications in other variations may occur to those skilled in the art based upon the foregoing description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A wet flue gas desulfurization slurry spray system, comprising:
a plurality of spraying main pipes (41) the interior of which is suitable for conveying limestone slurry;
one end of the spray branch pipe (42) is connected with the spray main pipe (41), and the other end of the spray branch pipe (42) is connected with a nozzle (43); the nozzle (43) is adapted to eject the limestone slurry downwardly;
along the vertical downward direction, the cross section of the main spraying pipe (41) is in a shuttle shape, the long axis of the shuttle shape is along the vertical direction, and the short axis of the shuttle shape is along the horizontal direction.
2. The slurry spray system of claim 1 wherein the ratio of the major axis to the minor axis is between 1.05 and 20.
3. The slurry spray system of claim 2 wherein the ratio of the major axis to the minor axis is between 1.5 and 3.
4. The slurry spray system according to any one of claims 1 to 3, wherein a plurality of the spray main pipes (41) are arranged at intervals.
5. A desulfurization and moisture removal chimney integrated tower is characterized by comprising: a tower body (1) and a spray level, said spray level being arranged in said tower body (1), said spray level comprising a slurry spray system (4) according to any of claims 1 to 4.
6. The integrated desulfurization and moisture removal chimney tower of claim 5, further comprising:
a tray (5) disposed below the spray layer;
and the slurry pool (7) is arranged at the bottom of the tower body (1).
7. The integrated desulfurization and moisture removal chimney tower of claim 6, further comprising:
the flue gas inlet (6) is formed in the tower body (1); the flue gas inlet (6) is positioned between the slurry tank (7) and the spraying layer;
the chimney (2) is arranged at the top of the tower body (1); and a flue gas outlet is formed in the top of the chimney (2).
8. The integrated desulfurization and moisture removal chimney tower of claim 7, further comprising:
a wet electric precipitator (8) disposed in the tower body (1); wet-type electrostatic precipitator (8) are located spray the layer with between the exhanst gas outlet.
9. The integrated desulfurization and moisture removal chimney tower of claim 8, further comprising:
the demister is arranged in the tower body (1); the demister is arranged between the spraying layer and the flue gas outlet.
10. The integrated desulfurization and moisture removal chimney tower of claim 9, further comprising:
a lower reducer section (11) arranged between the demister and the wet electric dust collector (8); the diameter of the tower body (1) at the lower reducing section (11) is gradually reduced along the vertical downward direction;
the air flow uniform distribution plate (10) is arranged on the lower reducer section (11);
and/or an upper reducer section (9) arranged between the chimney (2) and the wet electric dust collector (8); the diameter of the tower body (1) positioned at the upper reducing section (9) is gradually increased along the vertical downward direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469554.0A CN114797409A (en) | 2022-04-28 | 2022-04-28 | Slurry spraying system for wet desulphurization and integrative tower of wet desulphurization and chimney |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469554.0A CN114797409A (en) | 2022-04-28 | 2022-04-28 | Slurry spraying system for wet desulphurization and integrative tower of wet desulphurization and chimney |
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| CN114797409A true CN114797409A (en) | 2022-07-29 |
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| CN202210469554.0A Pending CN114797409A (en) | 2022-04-28 | 2022-04-28 | Slurry spraying system for wet desulphurization and integrative tower of wet desulphurization and chimney |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Application publication date: 20220729 |