CN219764989U - Wet flue gas desulfurization thick liquid waste heat utilization system - Google Patents
Wet flue gas desulfurization thick liquid waste heat utilization system Download PDFInfo
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- CN219764989U CN219764989U CN202321045997.3U CN202321045997U CN219764989U CN 219764989 U CN219764989 U CN 219764989U CN 202321045997 U CN202321045997 U CN 202321045997U CN 219764989 U CN219764989 U CN 219764989U
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- thick liquid
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 112
- 230000023556 desulfurization Effects 0.000 title claims abstract description 112
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000003546 flue gas Substances 0.000 title claims abstract description 33
- 239000010808 liquid waste Substances 0.000 title claims description 4
- 239000002002 slurry Substances 0.000 claims abstract description 151
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 22
- 239000002918 waste heat Substances 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000007921 spray Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 abstract description 32
- 239000007787 solid Substances 0.000 abstract description 23
- 238000000151 deposition Methods 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 description 21
- 239000000779 smoke Substances 0.000 description 20
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 230000008021 deposition Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000003116 impacting effect Effects 0.000 description 3
- 150000003568 thioethers Chemical class 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a wet desulfurization slurry waste heat utilization system, and mainly relates to the technical fields of flue gas waste heat utilization and flue gas treatment. Including the desulfurizing tower, the bottom of desulfurizing tower is equipped with the inlet flue, the top of desulfurizing tower is equipped with the exhaust port, be equipped with a plurality of spray set between inlet flue and the exhaust port, all be equipped with thick liquid pipeline between spray set and the desulfurizing tower bottom, the thick liquid pipeline is including the main loop of intercommunication spray set and desulfurizing tower, be equipped with the tubing pump on the main loop, it has a return circuit to connect in parallel on the main loop, be equipped with the thick liquid cooler on the return circuit, the thick liquid cooler is equipped with water inlet and delivery port, be equipped with total valve and first valve on the main loop, all be equipped with the coarse strainer between desulfurizing tower and spray set and the thick liquid cooler, the intercommunication has the blow off pipe on the return circuit, be equipped with the blow off valve on the blow off pipe. The utility model has the beneficial effects that: solid particles contained in the desulfurization slurry are prevented from depositing, blocking and scaling on the slurry cooler, and the heat exchange efficiency of the slurry cooler is improved.
Description
Technical Field
The utility model relates to the technical field of flue gas waste heat utilization and flue gas treatment, in particular to a wet desulfurization slurry waste heat utilization system.
Background
For conventional coal-fired thermal power plants, the loss of flue gas from the boiler is a major part of the heat loss from the boiler. The exhaust loss is mainly reflected in the exhaust temperature of the outlet of the air preheater of the boiler, the exhaust temperature of a conventional domestic coal-fired boiler is generally designed to be 120-130 ℃, the exhaust loss accounts for about 70% of the heat loss of the boiler, and meanwhile, the directly discharged flue gas contains a large amount of sulfides which are directly discharged to the outside and influence the environment of the outside, so that the waste heat of the exhaust of the boiler needs to be reasonably utilized, and the sulfides in the flue gas are treated.
At present, the boiler flue gas waste heat utilization and flue gas treatment are more in transformation schemes, the more common desulfurization method is wet desulfurization, and contact absorption of flue gas and desulfurization liquid is realized under the liquid state, so that absorption of sulfides in the flue gas is realized by utilizing the liquid desulfurization liquid. Specifically, firstly, desulfurization slurry (lime water) is prepared, flue gas to be discharged is introduced from an air inlet at the bottom of a desulfurization tower, the desulfurization slurry is sprayed out through a plurality of spraying devices arranged at the middle upper part of the desulfurization tower, so that the desulfurization slurry is reversely contacted with the flue gas in the desulfurization tower, sulfide in the flue gas is absorbed, meanwhile, part of heat of high-temperature flue gas is transferred to low-temperature desulfurization slurry, then the high-temperature desulfurization slurry flows back to the bottom of the desulfurization tower, a plurality of slurry pipelines are communicated with the bottom of the desulfurization tower, the desulfurization slurry is pumped to the spraying position by a pipeline pump, one-time flue gas desulfurization circulation is realized, in addition, a slurry cooler is arranged on the slurry pipeline, water inlet and outlet are arranged on the slurry cooler, low-temperature water enters the slurry cooler through the water inlet, and exchanges heat with the high-temperature desulfurization slurry in the slurry pipeline, thereby realizing high-temperature desulfurization slurry cooling, heating low-temperature water at the same time, and supplying heat to users, and achieving the purpose of reasonably utilizing waste heat of boiler exhaust gas.
However, the wet desulfurization slurry is a solid-liquid mixture, and after the desulfurization slurry flows into the slurry cooler, solid particles contained in the desulfurization slurry are easy to deposit, block and scale on the slurry cooler, so that the heat exchange efficiency of the slurry cooler is affected.
Disclosure of Invention
The utility model aims to provide a wet desulfurization slurry waste heat utilization system, which can avoid deposition, blockage and scaling of solid particles contained in desulfurization slurry on a slurry cooler and improve the heat exchange efficiency of the slurry cooler.
The utility model aims to achieve the aim, and the utility model is realized by the following technical scheme:
the utility model provides a wet flue gas desulfurization thick liquid waste heat utilization system, includes the desulfurizing tower, the bottom of desulfurizing tower is equipped with the inlet flue, and the top of desulfurizing tower is equipped with the exhaust port, be equipped with many spray set between inlet flue and the exhaust port, be equipped with the thick liquid pipeline between spray set and the desulfurizing tower bottom, the thick liquid pipeline is including the main return circuit of intercommunication spray set and desulfurizing tower, be equipped with the pipeline pump on the main return circuit, it has a return circuit to connect in parallel on the main return circuit, be equipped with the thick liquid cooler on the return circuit, the thick liquid cooler is equipped with water inlet and delivery port, be equipped with master valve and first valve on the main return circuit, all be equipped with the coarse strainer between desulfurizing tower and spray set and the thick liquid cooler, the intercommunication has the blow off pipe on the return circuit, be equipped with the blowoff valve on the blow off pipe.
Further, a fixed filter screen is arranged between the coarse filter screen and the slurry cooler on the branch loop, a movable filter screen is connected between the fixed filter screen and the coarse filter screen in a sliding manner, and the movable filter screen is in contact with the fixed filter screen.
Further, the coarse filter screen is connected with a screw rod arranged at the end part of the movable filter screen in a sliding manner.
Further, a plurality of limiting blocks are arranged at the end part of the spiral rod, and two sides of the rough filter screen are respectively contacted with the limiting blocks.
Further, the branch loop is provided with a detachable short pipe, and the fixed filter screen, the movable filter screen and the coarse filter screen are all arranged in the short pipe.
Further, a second valve and a third valve are arranged on the branch loop.
Compared with the prior art, the utility model has the beneficial effects that:
1. when the desulfurization tower works normally, the first valve is closed, the main valve is opened, the pipeline pump is matched, so that desulfurization slurry flows out from the bottom of the desulfurization tower, flows to the coarse filter screen, the slurry cooler, the main valve and the spraying device in sequence through the slurry pipeline, and meanwhile, low-temperature water enters the slurry cooler from the water inlet, so that the low-temperature water exchanges heat with high-temperature desulfurization slurry in the slurry pipeline, the high-temperature desulfurization slurry is cooled, and meanwhile, the low-temperature water is heated to supply heat for a user; then, the low-temperature desulfurization slurry is sprayed out from a plurality of spraying devices arranged at the middle upper part of the desulfurization tower, so that the desulfurization slurry is reversely contacted with flue gas in the desulfurization tower, sulfide contained in the flue gas is absorbed, and part of heat contained in the flue gas is transferred to the desulfurization slurry, so that the waste heat of the boiler flue gas is reasonably utilized, and the purpose of reasonably utilizing the waste heat of the boiler flue gas is achieved; in addition, larger fixed particles contained in the desulfurization slurry are filtered through a coarse filter screen, so that solid particles are prevented from being deposited and blocked on the slurry cooler, and the heat exchange efficiency of the slurry cooler is prevented from being influenced by scaling;
2. when the slurry cooler is required to be backwashed, when the first valve is opened and the main valve is closed, desulfurization slurry flows out from the bottom of the desulfurization tower and flows to the coarse screen, the first valve, the slurry cooler, the coarse screen and the blow-down valve in sequence through the slurry pipeline, so that the coarse screen arranged on the slurry cooler and the branch loop is backwashed, solid particles are prevented from being deposited and blocked on the slurry cooler, scaling is avoided, the heat exchange efficiency of the slurry cooler is improved, in addition, desulfurization slurry can be directly discharged from the blow-down pipe through the main loop and the branch loop, larger solid particles intercepted by the coarse screen are taken away, and the coarse screen is prevented from being blocked by the larger solid particles.
Drawings
Fig. 1 is a schematic diagram of the structure of the present utility model.
Fig. 2 is a schematic view of the structure of the screw of the present utility model.
FIG. 3 is a schematic view of the structure of the fixed filter screen and the movable filter screen of the present utility model.
The reference numbers shown in the drawings:
1. a desulfurizing tower; 2. a smoke inlet; 3. a smoke outlet; 4. a spraying device; 5. a main loop; 6. a pipeline pump; 7. a branch loop; 8. a slurry cooler; 9. a water inlet; 10. a water outlet; 11. a main valve; 12. a first valve; 13. a coarse filter screen; 14. a blow-down pipe; 15. a blow-down valve; 16. fixing a filter screen; 17. a movable filter screen; 18. a screw rod; 19. a limiting block; 20. a second valve; 21. and a third valve.
Detailed Description
The utility model will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it will be understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the utility model, and equivalents thereof fall within the scope of the utility model as defined by the claims.
The utility model provides a wet desulfurization slurry waste heat utilization system, as shown in figures 1-3, which comprises a desulfurization tower 1, wherein the bottom of the desulfurization tower 1 is provided with a smoke inlet 2, and the top of the desulfurization tower 1 is provided with a smoke outlet 3 for the entry and exit of smoke; a plurality of spraying devices 4 are arranged between the smoke inlet 2 and the smoke outlet 3 and are used for spraying desulfurization slurry to enable the desulfurization slurry to reversely contact with smoke in the desulfurization tower 1, so that sulfide contained in the smoke is absorbed, and meanwhile, part of heat contained in the smoke is transferred to the desulfurization slurry, so that waste heat of boiler smoke is reasonably utilized; a slurry pipeline is arranged between the spraying device 4 and the bottom of the desulfurizing tower 1, the slurry pipeline comprises a main loop 5 which is communicated with the spraying device 4 and the desulfurizing tower 1, a pipeline pump is arranged on the main loop 5, a branch loop 7 is connected in parallel on the main loop 5, a slurry cooler 8 is arranged on the branch loop 7, the slurry cooler 8 is provided with a water inlet 9 and a water outlet 10, a main valve 11 and a first valve 12 are arranged on the main loop 5, a coarse screen 13 is arranged between the desulfurizing tower 1 and the spraying device 4 and the slurry cooler 8, a blow-down pipe 14 is communicated on the branch loop 7, and a blow-down valve 15 is arranged on the blow-down pipe 14;
when the desulfurization tower works normally, the first valve 12 is closed, the main valve 11 is opened, a pipeline pump is matched, so that desulfurization slurry flows out from the bottom of the desulfurization tower 1, flows to the coarse filter screen 13, the slurry cooler 8, the main valve 11 and the spraying device 4 in sequence through the slurry pipeline, meanwhile, low-temperature water enters the slurry cooler 8 from the water inlet 9, so that the low-temperature water exchanges heat with high-temperature desulfurization slurry in the slurry pipeline, high-temperature desulfurization slurry cooling is realized, and meanwhile, the low-temperature water is heated to supply heat for a user; then, the low-temperature desulfurization slurry is sprayed out from a plurality of spraying devices 4 arranged at the middle upper part of the desulfurization tower 1, so that the desulfurization slurry is reversely contacted with the flue gas in the desulfurization tower 1, sulfide contained in the flue gas is absorbed, and part of heat contained in the flue gas is transferred to the desulfurization slurry, so that the waste heat of the boiler exhaust gas is reasonably utilized; in addition, larger fixed particles contained in the desulfurization slurry are filtered through the coarse screen 13, so that the deposition and blockage of solid particles on the slurry cooler are avoided, and the heat exchange efficiency of the slurry cooler 8 is influenced by scaling;
when the slurry cooler is required to be backwashed, when the first valve 12 is opened and the main valve 11 is closed, desulfurization slurry flows out from the bottom of the desulfurization tower 1 and flows to the coarse filter screen 13, the first valve 12, the slurry cooler 8, the coarse filter screen 13 and the blow-down valve 15 in sequence through slurry pipelines, so that the coarse filter screen 13 arranged on the slurry cooler 8 and the branch loop 7 is backwashed, solid particles are prevented from depositing and blocking the slurry cooler, scaling is avoided, the heat exchange efficiency of the slurry cooler 8 is improved, in addition, desulfurization slurry can be directly discharged from the blow-down pipe 14 through the main loop 5 and the branch loop 7, larger solid particles intercepted by the coarse screen on the main loop 5 are taken away, and the coarse filter screen 13 is prevented from being blocked by the larger solid particles.
Preferably, a fixed filter screen 16 is arranged between the coarse filter screen 13 and the slurry cooler 8 on the branch loop 7, a movable filter screen 17 is connected between the fixed filter screen 16 and the coarse filter screen 13 in a sliding manner, the movable filter screen 17 is contacted with the fixed filter screen 16, and the coarse filter screen 13, the movable filter screen 17 and the fixed filter screen 16 are provided with coarse filter holes with larger holes, so that larger fixed particles can be sieved, and meanwhile, the coarse filter holes arranged on the movable filter screen 17 and the fixed filter screen 16 are staggered with each other, and during back washing, too small particles contained in the desulfurization slurry can pass through the movable filter screen 17 and the fixed filter screen 16, so that the small solid particles are prevented from being intercepted and stopped in the slurry cooler by the movable filter screen 17 and the fixed filter screen 16, and the heat exchange efficiency of the slurry cooler is improved; during normal heat exchange, the movable filter screen 17 is slid on the branch loop 7 to be contacted with the fixed filter screen 16, and the coarse sieve holes arranged on the movable filter screen 17 and the fixed filter screen form smaller fine sieve holes, so that smaller particles contained in the slurry desulfurization slurry are filtered, the smaller solid particles are prevented from entering the slurry cooler, and the heat exchange efficiency of the slurry cooler is improved.
Preferably, the coarse filter screen 13 is slidably connected with a screw rod 18 arranged at the end part of the movable filter screen 17, and during normal heat exchange, the movable filter screen 17 is driven to slide on the branch loop 7 by acting force generated by the impact of the desulfurization slurry on the screw rod 18, so that the movable filter screen is contacted with the fixed filter screen 16, smaller solid particles contained in the desulfurization slurry are filtered, the smaller solid particles are prevented from entering the slurry cooler, and the heat exchange efficiency of the slurry cooler is improved; during back cleaning, the acting force generated by the desulfurization slurry impacting the screw rod 18 drives the movable filter screen 17 to slide on the branch loop 7, so that the contact relation between the movable filter screen 17 and the fixed filter screen 16 is released, the too small particles contained in the sulfur slurry can pass through the movable filter screen 17 and the fixed filter screen 16, the small solid particles are prevented from being intercepted and stopped in the slurry cooler by the movable filter screen 17 and the fixed filter screen 16, the heat exchange efficiency of the slurry cooler is improved, in addition, the desulfurization slurry forms rotational flow through the screw rod 18, dirt on the pipe wall is washed, and the heat exchange efficiency of the slurry cooler is improved.
Preferably, a plurality of limiting blocks 19 are arranged at the end part of the screw rod 18, two sides of the coarse filter screen 13 are respectively contacted with the limiting blocks 19, and two sides of the coarse filter screen 13 are respectively contacted with the limiting blocks 19, so that the threaded rod slides in a certain section on the coarse filter screen 13, and the movable screen is prevented from being separated from the track to affect normal filtration.
Preferably, the branch loop 7 is provided with a detachable short pipe, the fixed filter screen 16, the movable filter screen 17 and the coarse filter screen 13 are arranged in the short pipe, two ends of the specific short pipe are in flange connection with the branch loop 7, and all filter screens arranged in the short pipe can be quickly cleaned by disassembling the short pipe, so that the maintenance efficiency of the filter screens is improved.
Preferably, the branch loop 7 is provided with a second valve 20 and a third valve 21, when the heat exchange system is required to be maintained, the first valve 12 and the main valve 11 are opened, and when the second valve 20 and the third valve 21 are closed, normal maintenance of the heat exchange system is realized, and meanwhile, desulfurization slurry can still flow from the desulfurization tower 1 to the spraying device 4 through a slurry pipeline, so that the flue gas can still be subjected to desulfurization and cooling treatment normally during the maintenance of the heat exchange system.
Example 1
The utility model provides a wet desulfurization slurry waste heat utilization system, as shown in figures 1-3, comprising a desulfurization tower 1, wherein the bottom of the desulfurization tower 1 is provided with a smoke inlet 2, the top of the desulfurization tower 1 is provided with a smoke outlet 3 for the inlet and the outlet of smoke, a plurality of spraying devices 4 are arranged between the smoke inlet 2 and the smoke outlet 3 and are used for spraying desulfurization slurry to enable the desulfurization slurry to reversely contact with the smoke in the desulfurization tower 1, sulfide contained in the smoke is absorbed, part of heat contained in the smoke is transferred to the desulfurization slurry, waste heat of boiler smoke is reasonably utilized, slurry pipelines are arranged between the spraying devices 4 and the bottom of the desulfurization tower 1, each slurry pipeline comprises a main loop 5 which is communicated with the spraying devices 4 and the desulfurization tower 1, each main loop 5 is provided with a pipeline pump, each main loop 5 is connected with a branch loop 7 in parallel, each branch loop 7 is provided with a slurry cooler 8, each slurry cooler 8 is provided with a water inlet 9 and a water outlet 10, each main loop 5 is provided with a main valve 11 and a first valve 12, each branch loop 1 is communicated with the spraying devices 4 and each slurry cooler 8 with a coarse filter screen 13, a drain pipe 14 is communicated with each branch loop 7, and each branch loop 14 is provided with a drain valve 15;
when the desulfurization tower works normally, the first valve 12 is closed, the main valve 11 is opened, a pipeline pump is matched, so that desulfurization slurry flows out from the bottom of the desulfurization tower 1, flows to the coarse filter screen 13, the slurry cooler 8, the main valve 11 and the spraying device 4 in sequence through the slurry pipeline, meanwhile, low-temperature water enters the slurry cooler 8 from the water inlet 9, so that the low-temperature water exchanges heat with high-temperature desulfurization slurry in the slurry pipeline, high-temperature desulfurization slurry cooling is realized, and meanwhile, the low-temperature water is heated to supply heat for a user; then, the low-temperature desulfurization slurry is sprayed out from a plurality of spraying devices 4 arranged at the middle upper part of the desulfurization tower 1, so that the desulfurization slurry is reversely contacted with the flue gas in the desulfurization tower 1, sulfide contained in the flue gas is absorbed, and part of heat contained in the flue gas is transferred to the desulfurization slurry, so that the waste heat of the boiler exhaust gas is reasonably utilized; in addition, larger fixed particles contained in the desulfurization slurry are filtered through the coarse screen 13, so that the deposition and blockage of solid particles on the slurry cooler are avoided, and the heat exchange efficiency of the slurry cooler 8 is influenced by scaling;
when the slurry cooler is required to be backwashed, when the first valve 12 is opened and the main valve 11 is closed, desulfurization slurry flows out from the bottom of the desulfurization tower 1 and flows to the coarse filter screen 13, the first valve 12, the slurry cooler 8, the coarse filter screen 13 and the blow-down valve 15 in sequence through slurry pipelines, so that the coarse filter screen 13 arranged on the slurry cooler 8 and the branch loop 7 is backwashed, solid particles are prevented from depositing and blocking the slurry cooler, scaling is avoided, the heat exchange efficiency of the slurry cooler 8 is improved, in addition, desulfurization slurry can be directly discharged from the blow-down pipe 14 through the main loop 5 and the branch loop 7, larger solid particles intercepted by the coarse screen on the main loop 5 are taken away, and the coarse filter screen 13 is prevented from being blocked by the larger solid particles.
Example 2
On the basis of embodiment 1, a fixed filter screen 16 is arranged between the coarse filter screen 13 and the slurry cooler 8 on the branch loop 7, a movable filter screen 17 is connected between the fixed filter screen 16 and the coarse filter screen 13 in a sliding way, the movable filter screen 17 is contacted with the fixed filter screen 16, a screw rod 18 arranged at the end part of the movable filter screen 17 is connected on the coarse filter screen 13 in a sliding way, a plurality of limiting blocks 19 are arranged at the end part of the screw rod 18, two sides of the coarse filter screen 13 are respectively contacted with the limiting blocks 19, and particularly, coarse screen holes with larger holes are arranged on the coarse filter screen 13, the movable filter screen 17 and the fixed filter screen 16, larger fixed particles can be screened, and meanwhile, the coarse screen holes arranged on the movable filter screen 17 and the fixed filter screen 16 are mutually staggered;
during normal heat exchange, the acting force generated by the desulfurization slurry impacting the screw rod 18 drives the movable filter screen 17 to slide on the branch loop 7 so as to enable the movable filter screen to be in contact with the fixed filter screen 16, and coarse sieve holes arranged on the movable filter screen and the fixed filter screen form smaller fine sieve holes for filtering smaller solid particles contained in the desulfurization slurry, so that the smaller solid particles are prevented from entering the slurry cooler, and the heat exchange efficiency of the slurry cooler is improved;
during back cleaning, the acting force generated by the desulfurization slurry impacting the screw rod 18 drives the movable filter screen 17 to slide on the branch loop 7, so that the contact relation between the movable filter screen 17 and the fixed filter screen 16 is released, the too small particles contained in the sulfur slurry can pass through the movable filter screen 17 and the fixed filter screen 16, the small solid particles are prevented from being intercepted and stopped in the slurry cooler by the movable filter screen 17 and the fixed filter screen 16, the heat exchange efficiency of the slurry cooler is improved, in addition, the desulfurization slurry forms rotational flow through the screw rod 18, dirt on the pipe wall is washed, and the heat exchange efficiency of the slurry cooler is improved.
Example 3
On the basis of embodiment 2, through the both sides of coarse strainer 13 respectively with stopper 19 contact for the threaded rod slides in the certain interval on coarse strainer 13, avoids the activity screen cloth to break away from the track and influences normal filtration, has detachable nozzle stub on the branch circuit 7, and fixed filter screen 16, activity filter screen 17, coarse strainer 13 all set up in the nozzle stub, and specific nozzle stub both ends and branch circuit 7 flange joint can wash all filter screens that are equipped with in the nozzle stub fast through dismantling the nozzle stub, improve the efficiency that the filter screen was maintained.
Example 4
On the basis of embodiment 1, when the heat exchange system needs to be maintained, the first valve 12 and the main valve 11 are opened, and the second valve 20 and the third valve 21 are closed, so that normal maintenance of the heat exchange system is realized, and meanwhile, desulfurization slurry can still flow from the desulfurization tower 1 to the spraying device 4 through the slurry pipeline, so that the desulfurization and cooling treatment of flue gas can still be normally performed during the maintenance of the heat exchange system.
Claims (6)
1. The utility model provides a wet flue gas desulfurization thick liquid waste heat utilization system, includes desulfurizing tower (1), the bottom of desulfurizing tower (1) is equipped with into inlet flue (2), and the top of desulfurizing tower (1) is equipped with exhaust port (3), be equipped with many spray set (4) between inlet flue (2) and exhaust port (3), be equipped with thick liquid pipeline between spray set (4) and desulfurizing tower (1) bottom, its characterized in that: the utility model provides a desulfurization tower, including main return circuit (5) of intercommunication spray set (4) and desulfurizing tower (1), be equipped with tubing pump (6) on main return circuit (5), it has branch return circuit (7) to connect in parallel on main return circuit (5), be equipped with thick liquid cooler (8) on branch return circuit (7), thick liquid cooler (8) are equipped with water inlet (9) and delivery port (10), be equipped with total valve (11) and first valve (12) on main return circuit (5), all be equipped with coarse strainer (13) between desulfurizing tower (1) and spray set (4) and thick liquid cooler (8), the intercommunication has blow off pipe (14) on branch return circuit (7), be equipped with blow off valve (15) on blow off pipe (14).
2. The wet desulfurization slurry waste heat utilization system according to claim 1, wherein: a fixed filter screen (16) is arranged between the coarse filter screen (13) and the slurry cooler (8) on the branch loop (7), a movable filter screen (17) is connected between the fixed filter screen (16) and the coarse filter screen (13) in a sliding way, and the movable filter screen (17) is contacted with the fixed filter screen (16).
3. The wet desulfurization slurry waste heat utilization system according to claim 2, wherein: the coarse filter screen (13) is connected with a screw rod (18) arranged at the end part of the movable filter screen (17) in a sliding way.
4. A wet desulfurization slurry waste heat utilization system according to claim 3, wherein: the end part of the screw rod (18) is provided with a plurality of limiting blocks (19), and two sides of the coarse filter screen (13) are respectively contacted with the limiting blocks (19).
5. The wet desulfurization slurry waste heat utilization system according to claim 2, wherein: the branch loop (7) is provided with a detachable short pipe, and the fixed filter screen (16), the movable filter screen (17) and the coarse filter screen (13) are all arranged in the short pipe.
6. The wet desulfurization slurry waste heat utilization system according to claim 1, wherein: the branch loop (7) is provided with a second valve (20) and a third valve (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321045997.3U CN219764989U (en) | 2023-04-28 | 2023-04-28 | Wet flue gas desulfurization thick liquid waste heat utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321045997.3U CN219764989U (en) | 2023-04-28 | 2023-04-28 | Wet flue gas desulfurization thick liquid waste heat utilization system |
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| Publication Number | Publication Date |
|---|---|
| CN219764989U true CN219764989U (en) | 2023-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321045997.3U Active CN219764989U (en) | 2023-04-28 | 2023-04-28 | Wet flue gas desulfurization thick liquid waste heat utilization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219764989U (en) |
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2023
- 2023-04-28 CN CN202321045997.3U patent/CN219764989U/en active Active
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