CN115234911B - Rotary heat exchange non-reversing type heat storage combustion system applied to rectifying tower - Google Patents
Rotary heat exchange non-reversing type heat storage combustion system applied to rectifying tower Download PDFInfo
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- CN115234911B CN115234911B CN202210716523.0A CN202210716523A CN115234911B CN 115234911 B CN115234911 B CN 115234911B CN 202210716523 A CN202210716523 A CN 202210716523A CN 115234911 B CN115234911 B CN 115234911B
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 27
- 238000005338 heat storage Methods 0.000 title abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 137
- 239000003546 flue gas Substances 0.000 claims abstract description 137
- 239000007789 gas Substances 0.000 claims abstract description 69
- 239000007921 spray Substances 0.000 claims abstract description 24
- 239000002737 fuel gas Substances 0.000 claims abstract description 19
- 239000000779 smoke Substances 0.000 claims description 40
- 238000005192 partition Methods 0.000 claims description 20
- 238000009825 accumulation Methods 0.000 claims description 7
- 230000001172 regenerating effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000003763 carbonization Methods 0.000 abstract description 5
- 238000000354 decomposition reaction Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000000428 dust Substances 0.000 description 17
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 7
- 229910052725 zinc Inorganic materials 0.000 description 7
- 239000011701 zinc Substances 0.000 description 7
- 239000011449 brick Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/72—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with backwash arms, shoes or nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a rotary heat exchange non-reversing heat storage combustion system applied to a rectifying tower, which comprises a fuel gas supply system, an air supply system, a flue gas discharge system and a heat exchanger, wherein the fuel gas supply system is connected with the air supply system; the gas supply system comprises a gas pipeline, a gas filter, a gas pressure reducing valve and a spray gun, the spray gun is connected with the gas pipeline, the spray gun is arranged in the rectifying tower in a row, the air supply system comprises an air pipeline and a blower, and the air pipeline is communicated to the rectifying tower; the flue gas discharge system comprises a flue gas pipeline and a flue gas induced draft fan, and the flue gas pipeline is communicated to the rectifying tower; the air pipeline and the flue gas pipeline are both connected with the heat exchanger; the heat accumulating combustion system improves a fuel gas supply system, realizes multi-stage supply of fuel gas, fully mixes and burns the fuel gas of each stage with air of a corresponding level, avoids the decomposition and carbonization phenomena of the fuel gas in a high-temperature environment, improves the combustion efficiency and reduces the energy consumption.
Description
Technical Field
The invention relates to the field of pyrometallurgy zinc, in particular to a rotary heat exchange non-reversing heat storage combustion system applied to a rectifying tower.
Background
In the fire zinc smelting process, a rectifying tower is required to carry out fire purification on crude zinc, lead, cadmium, iron and other impurities in the crude zinc are removed to obtain rectified zinc (pure zinc), the rectifying tower generally uses gas and other fuel gases to carry out flame-proof heating on crude zinc liquid in an internal silicon carbide tray, and an air supply system is arranged in the rectifying tower to support combustion by the fuel gases; in order to save energy, high-temperature flue gas exhausted from the rectifying tower exchanges heat with combustion air through a heat exchanger, so that the combustion air enters the rectifying tower at a higher temperature. The supporting system of prior art rectifying column's defect lies in: 1. the gas inlet mode is unreasonable, the current gas is only input from the upper part of a primary air channel of the rectifying tower, the gas is firstly mixed and combusted with the primary air, and the unburned gas is mixed and combusted with secondary air and tertiary air sequentially along the descending direction of a hearth under the action of the negative pressure of the hearth; in the process, the fuel gas is not fully combusted, so that a carbonization phenomenon is easily generated by fission and decomposition in a high-temperature environment, the carbonization not only causes fuel waste, but also forms a carbon layer on the surface of a tray or a refractory material to prevent heat conduction, further increase the energy consumption of equipment and reduce the heat utilization efficiency; 2. the sleeve brick heat exchange chamber is adopted as a heat exchanger, the sealing performance of the sleeve brick is poor, air is easy to leak into smoke, the overall heat exchange efficiency is poor, the temperature of the preheated air in the sleeve brick heat exchange chamber is about 550, the smoke discharging temperature is 500-600 ℃, and the heat utilization rate is only about 25-30%.
Disclosure of Invention
The invention aims to solve the technical problems that the gas inlet mode of a matched system of a rectifying tower in the prior art is unreasonable and the heat utilization rate of a sleeve brick heat exchange chamber is low.
In order to solve the technical problems, the invention adopts the following technical scheme: the rotary heat exchange non-reversing heat accumulation combustion system applied to the rectifying tower comprises a fuel gas supply system, an air supply system, a flue gas discharge system and a heat exchanger;
The gas supply system comprises a gas pipeline, a gas filter, a gas pressure reducing valve and spray guns, wherein the gas filter and the gas pressure reducing valve are both arranged in the gas pipeline, the spray guns are connected with the gas pipeline, the spray guns are arranged in a rectifying tower in rows, a plurality of spray guns in each row of spray guns are aligned up and down and distributed at different heights of the rectifying tower, and generally, the number of the spray guns in each row is consistent with the number of air channels in the rectifying tower, and one spray gun is arranged in a nearby area above or below each air channel;
the air supply system comprises an air pipeline and a blower, the blower is connected with the air pipeline, and the air pipeline is communicated to the rectifying tower;
The flue gas discharge system comprises a flue gas pipeline and a flue gas induced draft fan, the flue gas induced draft fan is connected with the flue gas pipeline, and the flue gas pipeline is communicated to the rectifying tower; the air pipeline and the flue gas pipeline are both connected with the heat exchanger, and air in the air pipeline and flue gas in the flue gas pipeline generate heat exchange in the heat exchanger.
The heat accumulating combustion system improves a fuel gas supply system, realizes multi-stage supply of fuel gas, fully mixes and burns the fuel gas of each stage with air of a corresponding level, avoids the decomposition and carbonization phenomena of the fuel gas in a high-temperature environment, improves the combustion efficiency and reduces the energy consumption.
Further, the heat exchanger comprises an outer cylinder, a rotating shaft, a partition plate and a heat accumulator, wherein the rotating shaft is arranged in the outer cylinder, the partition plate is arranged on the rotating shaft, the inner part of the outer cylinder is partitioned into at least two gas circulation areas by the partition plate, the heat accumulator is positioned on the partition plate, and the air pipeline and the flue gas pipeline are respectively communicated with different gas circulation areas; the rotating shaft drives the partition plate and the heat accumulator to rotate, so that the heat accumulator rotates in different gas circulation areas, and when the heat accumulator is in the gas circulation area where the flue gas pipeline is positioned, the heat accumulator absorbs heat; when the heat accumulator is in the gas circulation area where the air pipeline is positioned, the heat accumulator releases heat and heats air; the heat accumulator is directly contacted with the flue gas and air, so that the heat exchange efficiency can be remarkably improved, the traditional preheated air is improved to be more than 850 ℃, the exhaust temperature is reduced to be about 200 ℃ from the traditional 550 ℃, and the fuel can be saved by 20% -30%.
In order to prevent dust from entering an air pipeline along with a heat accumulator, the partition plate is arranged in a cross shape, and separates four gas circulation areas in the outer cylinder, and the four gas circulation areas are respectively called a first smoke circulation area, a second smoke circulation area, a first air circulation area and a second air circulation area along the rotation direction of a rotating shaft;
The air pipeline comprises a first air inlet pipe, a second air inlet pipe, a third air inlet pipe, a first air outlet pipe and a second air outlet pipe, wherein the first air inlet pipe and the first air outlet pipe are both communicated with a first air circulation area, the second air inlet pipe and the second air outlet pipe are both communicated with a second air circulation area, and the third air inlet pipe is communicated with a second smoke circulation area;
The flue gas pipeline comprises a first flue gas inlet pipe, a second flue gas inlet pipe, a first flue gas outlet pipe, a second flue gas outlet pipe and a flue gas return pipe, wherein the first flue gas inlet pipe and the first flue gas outlet pipe are both communicated to the first flue gas circulation area, and the second flue gas inlet pipe and the second flue gas outlet pipe are both communicated to the second flue gas circulation area; the flue gas return pipe is connected with the first flue gas inlet pipe and the second flue gas inlet pipe, and a return gas valve is arranged in the flue gas return pipe;
In the invention, the heat accumulator is firstly heated in the first smoke circulation area, then enters the second smoke circulation area for secondary heating, and the heat accumulator is inevitably stained with dust at the moment; then, the second flue gas inlet pipe is closed, fresh air is blown into the second flue gas circulation area by the third air inlet pipe, and the fresh air brings dust on the heat accumulator to enter the first flue gas inlet pipe and the first flue gas circulation area through the flue gas return pipe; after the heat accumulator is cleaned, the shaft rotates to bring the heat accumulator into the first air circulation area, and the heat accumulator heats the air.
When the heat exchanger works, dust is inevitably attached to the first smoke circulation area, the second smoke circulation area, the first smoke inlet pipe and the second smoke inlet pipe, so that the heat exchanger and the smoke pipeline are required to be cleaned regularly by a production unit. Because the flue gas return pipe is arranged, part of dust in the second flue gas circulation area is led into the first flue gas circulation area for a long time, the dust accumulation speed in the first flue gas circulation area is far higher than that in the second flue gas circulation area, and the unbalanced dust accumulation can cause the increase of the cleaning frequency of production units; in order to overcome the problem, the flue gas return pipe is also provided with a flue gas filter and an anti-inflation pipe, wherein the flue gas filter comprises a shell and a filter screen positioned in the shell, the anti-inflation pipe is connected with an external air source, and the anti-inflation pipe is provided with an anti-inflation valve; the smoke filter is positioned between the second smoke inlet pipe and the air return valve, and the anti-inflation pipe is positioned between the smoke filter and the air return valve;
The smoke filter can filter dust, so that dust in the second smoke circulation area is prevented from entering the first smoke circulation area; and in the period that the flue gas return pipe does not work, the return air valve is closed, at the moment, the reverse air charging pipe charges air into the flue gas return pipe, and the air current is utilized to recoil the filter screen, so that dust on the filter screen is recooled into the second flue gas circulation area, and most of the recoiled dust is discharged along with the flue gas.
Further, the heat accumulator is honeycomb ceramics, and the outer surface of the outer cylinder is wrapped with a heat insulation layer.
Further, the gas supply system further comprises a pressure gauge, a gas flowmeter, a pressure switch and a gas electric regulating valve which are arranged on the gas pipeline, the air supply system further comprises a pressure transmitter and an air V-cone flowmeter which are arranged on the air pipeline, and the flue gas discharge system further comprises a thermocouple which is arranged on the flue gas pipeline.
The beneficial effects are that: (1) The rotary heat exchange non-reversing heat accumulation combustion system realizes multi-stage supply of the fuel gas, and the fuel gas of each stage is fully mixed with air of a corresponding level for combustion, so that the decomposition carbonization phenomenon of the fuel gas in a high-temperature environment is avoided, the combustion efficiency is improved, and the energy consumption is reduced. (2) According to the rotary heat exchange non-reversing heat storage combustion system, the third air outlet pipe is used for carrying out air purging on the heat storage body in the second smoke circulation area, dust is prevented from entering the first air circulation area and the second air circulation area, and combustion air entering the rectifying tower is cleaner. (3) According to the rotary heat exchange non-reversing heat storage combustion system, the smoke filter is arranged in the smoke return pipe, so that the dust accumulation speed in the first smoke circulation area is prevented from being too high, and the cleaning frequency required by the system is reduced. (4) The rotary heat exchange non-reversing heat accumulation combustion system is provided with the anti-inflation pipe in the flue gas return pipe, and the filter screen is cleaned by using backflushing airflow, so that the working efficiency of the flue gas filter is ensured.
Drawings
Fig. 1 is a block diagram of a fuel gas supply system in example 1.
Fig. 2 is a block diagram of a flue gas evacuation system and an air supply system in example 1.
Fig. 3 is a cross-sectional view of the heat exchanger of example 1.
Fig. 4 is a cross-sectional view A-A of fig. 3.
Fig. 5 is a B-B cross-sectional view of fig. 4.
Fig. 6 is an enlarged view of fig. 5 a.
Fig. 7 is a C-C cross-sectional view of fig. 4.
FIG. 8 is a schematic view showing the installation of the spray gun in the rectifying column in example 1.
Wherein: 100. a gas supply system; 110. a gas line; 120. a gas filter; 130. a gas pressure reducing valve; 140. a spray gun; 150. a pressure gauge; 160. a gas flowmeter; 170. a pressure switch; 180. a gas electric regulating valve; 200. an air supply system; 210. an air line; 211. a first air intake duct; 212. a second air intake duct; 213. a third air intake duct; 214. a first air outlet duct; 215. a second air outlet duct; 220. a blower; 230. a pressure transmitter; 240. an air V-cone flowmeter; 300. a flue gas discharge system; 310. a flue gas pipeline; 311. a first flue gas inlet pipe; 312. a second flue gas inlet pipe; 313. a first flue gas outlet pipe; 314. a second flue gas outlet pipe; 315. a flue gas return pipe; 320. a smoke induced draft fan; 330. a thermocouple; 340. an air return valve; 350. a flue gas filter; 351. a housing; 352. a filter screen; 360. an anti-inflation tube; 370. a reverse inflation valve; 400. a heat exchanger; 410. an outer cylinder; 411. a first flue gas recirculation zone; 412. a second flue gas flow-through region; 413. a first air circulation zone; 414. a second air circulation zone; 420. a rotating shaft; 430. a partition plate; 440. a heat storage body; 450. a thermal insulation layer; 500. a rectifying tower; 510. an air channel.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Example 1
As shown in fig. 1 to 7, the rotary heat exchange non-reversing regenerative combustion system applied to the rectifying tower of the present embodiment includes a gas supply system 100, an air supply system 200, a flue gas discharge system 300, and a heat exchanger 400;
The gas supply system 100 includes a gas pipe 110, a gas filter 120, a gas pressure reducing valve 130, a spray gun 140, a pressure gauge 150, a gas flow meter 160, a pressure switch 170 and a gas electric regulating valve 180, wherein the gas filter 120, the gas pressure reducing valve 130, the pressure gauge 150, the gas flow meter 160, the pressure switch 170 and the gas electric regulating valve 180 are all installed in the gas pipe 110, the spray gun 140 is connected with the gas pipe 110, the spray guns 140 are arranged in a column in the rectifying tower 500, a plurality of spray guns 140 in each column of spray guns 140 are aligned up and down and distributed at different heights of the rectifying tower 500, as shown in fig. 8, the number of spray guns 140 in each column is three, and is consistent with the number of air channels 510 in the rectifying tower 500, and one spray gun 140 is arranged in a nearby area above or below each air channel 510;
As shown in fig. 2, the air supply system 200 includes an air pipe 210, a blower 220, a pressure transmitter 230, and an air V-cone flowmeter 240, the blower 220, the pressure transmitter 230, and the air V-cone flowmeter 240 are all connected to the air pipe 210, and the air pipe 210 is connected to the rectifying tower 500;
The flue gas discharge system 300 comprises a flue gas pipeline 310, a flue gas induced draft fan 320 and a thermocouple 330, wherein the flue gas induced draft fan 320 and the thermocouple 330 are connected with the flue gas pipeline 310, and the flue gas pipeline 310 is communicated to the rectifying tower 500; the air pipeline 210 and the flue gas pipeline 310 are both connected with the heat exchanger 400;
As shown in fig. 3 to 7, the heat exchanger 400 includes an outer tub 410, a rotation shaft 420, a partition 430, and a heat accumulator 440, the heat accumulator 440 is a honeycomb ceramic, and an outer surface of the outer tub 410 is wrapped with a heat insulation layer 450; the rotating shaft 420 is arranged in the outer cylinder 410, the partition plate 430 is arranged on the rotating shaft 420, the partition plate 430 is in a cross shape, four gas circulation areas are separated in the outer cylinder 410 by the partition plate 430, and the four gas circulation areas are respectively called a first smoke circulation area 411, a second smoke circulation area 412, a first air circulation area 413 and a second air circulation area 414 along the rotating direction of the rotating shaft 420;
the air pipeline 210 comprises a first air inlet pipe 211, a second air inlet pipe 212, a third air inlet pipe 213, a first air outlet pipe 214 and a second air outlet pipe 215, wherein the first air inlet pipe 211 and the first air outlet pipe 214 are communicated with a first air circulation area 413, the second air inlet pipe 212 and the second air outlet pipe 215 are communicated with a second air circulation area 414, and the third air inlet pipe 213 is communicated with a second smoke circulation area 412;
The flue gas pipeline 310 comprises a first flue gas inlet pipe 311, a second flue gas inlet pipe 312, a first flue gas outlet pipe 313, a second flue gas outlet pipe 314 and a flue gas return pipe 315, wherein the first flue gas inlet pipe 311 and the first flue gas outlet pipe 313 are both communicated to a first flue gas circulation area 411, and the second flue gas inlet pipe 312 and the second flue gas outlet pipe 314 are both communicated to a second flue gas circulation area 412; the flue gas return pipe 315 is connected with the first flue gas inlet pipe 311 and the second flue gas inlet pipe 312, and a return valve 340 is arranged in the flue gas return pipe 315;
a smoke filter 350 and a reverse inflation tube 360 are further arranged in the smoke return tube 315, the smoke filter 350 comprises a shell 351 and a filter screen 352 positioned in the shell 351, the reverse inflation tube 360 is connected with an external air source, and a reverse inflation valve 370 is arranged on the reverse inflation tube 360; the flue gas filter 350 is located between the second flue gas inlet pipe 312 and the return valve 340, and the anti-aeration pipe 360 is located between the flue gas filter 350 and the return valve 340.
The heat exchanger 400 in this embodiment is mainly used for implementing heat exchange between flue gas from the rectifying tower and combustion air, and the specific heat exchange principle is as follows:
(1) As shown in fig. 4, the heat accumulator 440 is first heated once in the first flue gas flow region 411;
(2) The rotating shaft 420 drives the partition plate 430 and the heat accumulator 440 to rotate, the heat accumulator 440 enters the second smoke circulation area 412 to be secondarily heated, and the heat accumulator 440 is inevitably stained with dust;
(3) After the heat accumulator 440 in the second flue gas flow-through region 412 is heated to a sufficient temperature, the second flue gas inlet tube 312 is closed; the third air inlet pipe 213 blows fresh air into the second smoke circulation area 412, and the fresh air carries dust on the heat accumulator 440 to sequentially pass through the smoke return pipe 315, the smoke filter 350 and the return valve 340 to enter the first smoke inlet pipe 311 and the first smoke circulation area 411;
(4) After the heat accumulator 440 is purged with fresh air, the rotating shaft 420 continues to drive the partition plate 430 and the heat accumulator 440 to rotate, the heat accumulator 440 enters the first air circulation area 413, and the heat accumulator 440 releases heat and heats air;
(5) The rotation shaft 420 continues to drive the partition 430 and the heat accumulator 440 to rotate, the heat accumulator 440 enters the second air circulation area 414, and the heat accumulator 440 releases heat and heats air.
In this embodiment, the hot air in the first air circulation area 413 and the second air circulation area 414 finally merges and enters the rectifying tower 500 to support combustion.
As shown in fig. 6, in the period when the flue gas return pipe 315 is not in operation, the return valve 340 is closed, at this time, the reverse inflation pipe 360 inflates the flue gas return pipe 315, and the air flow is utilized to recoil the filter screen 352, so that the dust on the filter screen 352 is recooled into the second flue gas circulation area 412, and most of the recoiled dust is discharged along with the flue gas.
Although embodiments of the present invention have been described in the specification, these embodiments are presented only, and should not limit the scope of the present invention. Various omissions, substitutions and changes in the form of examples are intended in the scope of the invention.
Claims (5)
1. Be applied to rotatory heat transfer non-reversing formula heat accumulation combustion system of rectifying column, its characterized in that: comprises a fuel gas supply system (100), an air supply system (200), a flue gas discharge system (300) and a heat exchanger (400);
the gas supply system (100) comprises a gas pipeline (110), a gas filter (120), a gas pressure reducing valve (130) and spray guns (140), wherein the gas filter (120) and the gas pressure reducing valve (130) are arranged in the gas pipeline (110), the spray guns (140) are connected with the gas pipeline (110), the spray guns (140) are arranged in a rectifying tower in a row, and a plurality of spray guns (140) in each row of spray guns (140) are aligned up and down and distributed at different heights of the rectifying tower;
the air supply system (200) comprises an air pipeline (210) and a blower (220), wherein the blower (220) is connected with the air pipeline (210), and the air pipeline (210) is communicated with the rectifying tower;
The flue gas discharge system (300) comprises a flue gas pipeline (310) and a flue gas induced draft fan (320), wherein the flue gas induced draft fan (320) is connected with the flue gas pipeline (310), and the flue gas pipeline (310) is communicated to the rectifying tower; the air pipeline (210) and the flue gas pipeline (310) are both connected with the heat exchanger (400), and air in the air pipeline (210) and flue gas in the flue gas pipeline (310) generate heat exchange in the heat exchanger (400);
The heat exchanger (400) comprises an outer cylinder (410), a rotating shaft (420), a partition plate (430) and a heat accumulator (440), wherein the rotating shaft (420) is arranged inside the outer cylinder (410), the partition plate (430) is arranged on the rotating shaft (420), the partition plate (430) divides the inside of the outer cylinder (410) into at least two gas circulation areas, the heat accumulator (440) is arranged on the partition plate (430), and the air pipeline (210) and the flue gas pipeline (310) are respectively communicated with different gas circulation areas;
The partition plate (430) is in a cross shape, the partition plate (430) divides four gas circulation areas in the outer cylinder (410), and the four gas circulation areas are respectively called a first smoke circulation area (411), a second smoke circulation area (412), a first air circulation area (413) and a second air circulation area (414) along the rotation direction of the rotating shaft (420);
the air pipeline (210) comprises a first air inlet pipe (211), a second air inlet pipe (212), a third air inlet pipe (213), a first air outlet pipe (214) and a second air outlet pipe (215), wherein the first air inlet pipe (211) and the first air outlet pipe (214) are communicated with a first air circulation area (413), the second air inlet pipe (212) and the second air outlet pipe (215) are communicated with a second air circulation area (414), and the third air inlet pipe (213) is communicated with a second smoke circulation area (412);
The flue gas pipeline (310) comprises a first flue gas inlet pipe (311), a second flue gas inlet pipe (312), a first flue gas outlet pipe (313), a second flue gas outlet pipe (314) and a flue gas return pipe (315), wherein the first flue gas inlet pipe (311) and the first flue gas outlet pipe (313) are both communicated to a first flue gas circulation area (411), and the second flue gas inlet pipe (312) and the second flue gas outlet pipe (314) are both communicated to a second flue gas circulation area (412); the flue gas return pipe (315) is connected with the first flue gas inlet pipe (311) and the second flue gas inlet pipe (312), and a return gas valve (340) is arranged in the flue gas return pipe (315);
a smoke filter (350) is also arranged in the smoke return pipe (315);
The flue gas filter (350) comprises a housing (351) and a filter screen (352) positioned in the housing (351);
The flue gas return pipe (315) is also provided with a reverse inflation pipe (360), the reverse inflation pipe (360) is connected with an external air source, and the reverse inflation pipe (360) is provided with a reverse inflation valve (370); the flue gas filter (350) is positioned between the second flue gas inlet pipe (312) and the air return valve (340), and the anti-inflation pipe (360) is positioned between the flue gas filter (350) and the air return valve (340).
2. The rotary heat exchange non-reversing regenerative combustion system applied to a rectifying tower according to claim 1, wherein: the heat accumulator (440) is made of honeycomb ceramics, and the outer surface of the outer cylinder (410) is wrapped with a heat insulation layer (450).
3. The rotary heat exchange non-reversing regenerative combustion system applied to a rectifying tower according to claim 1, wherein: the gas supply system (100) further comprises a pressure gauge (150), a gas flow meter (160), a pressure switch (170) and a gas electric regulating valve (180) which are arranged on the gas pipeline (110).
4. The rotary heat exchange non-reversing regenerative combustion system applied to a rectifying tower according to claim 1, wherein: the air supply system (200) also includes a pressure transmitter (230) and an air V-cone flow meter (240) mounted on the air line (210).
5. The rotary heat exchange non-reversing regenerative combustion system applied to a rectifying tower according to claim 1, wherein: the flue gas evacuation system (300) further comprises a thermocouple (330) mounted on the flue gas line (310).
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| DE3828347A1 (en) * | 1988-08-20 | 1990-03-01 | Schwaebische Huettenwerke Gmbh | EXHAUST GAS FILTER FOR HEATING OR COMBUSTION PLANTS |
| JP2003075289A (en) * | 2001-08-31 | 2003-03-12 | Mitsubishi Heavy Ind Ltd | Heat storage body heating type wind tunnel system having preheater utilizing exhaust gas and method for controlling burner in wind tunnel system |
| CN201110641Y (en) * | 2007-08-27 | 2008-09-03 | 济南百川同创实业有限公司 | Gas heat supply boiler special for stalk gas |
| JP5765197B2 (en) * | 2011-11-10 | 2015-08-19 | 三浦工業株式会社 | Heating medium boiler |
| JP6400559B2 (en) * | 2015-11-20 | 2018-10-03 | 株式会社マツダ | Regenerative combustion furnace |
| CN110864278A (en) * | 2019-12-04 | 2020-03-06 | 东键飞能源科技(上海)有限公司 | Composite heat recovery combustion system |
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