CN210532420U - Flue gas waste heat and moisture recovery system based on clean flue supports - Google Patents
Flue gas waste heat and moisture recovery system based on clean flue supports Download PDFInfo
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- CN210532420U CN210532420U CN201921294198.3U CN201921294198U CN210532420U CN 210532420 U CN210532420 U CN 210532420U CN 201921294198 U CN201921294198 U CN 201921294198U CN 210532420 U CN210532420 U CN 210532420U
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- clean flue
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- desulfurizing tower
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model belongs to the technical field of flue gas waste heat recovery utilizes technique and specifically relates to a flue gas waste heat and moisture recovery system based on clean flue supports. The utility model discloses a flue gas waste heat and moisture recovery system based on clean flue support, flue gas passes through former flue and gets into the desulfurizing tower, and flue gas gets into the clean flue of desulfurizing tower after the desulfurizing tower purifies; clean flue gas supports the heat exchanger with clean flue in the clean flue of desulfurizing tower and carries out heat convection, clean flue gas cooling, appear moisture, the moisture that appears collects to the hydrophobic groove of clean flue bottom along the wallboard of the clean flue of desulfurizing tower, the hydrophobic groove draws the moisturizing mouth of a river of delivering to the desulfurizing tower with the moisture that collects, carry out the moisturizing to the desulfurizing tower, demineralized water supports the cold source of heat exchanger as clean flue, introduce to clean flue by the demineralized water case in supporting the heat exchanger, cool down clean flue, demineralized water heats up through clean flue support heat exchanger after, get into buffer tank buffering steady voltage, carry to in the oxygen-eliminating device.
Description
Technical Field
The utility model belongs to the technical field of flue gas waste heat recovery utilizes technique and specifically relates to a flue gas waste heat and moisture recovery system based on clean flue supports.
Background
The development of the industrialized process of China enters the motorway, and the number of various power plants is increasing day by day. Along with the increasing strictness of national environmental protection policies, the flue gas discharged by boilers of various power plants needs to be purified by a desulfurizing tower; however, the resulting clean flue gas is accompanied by a large amount of water vapor which enters the atmosphere through the chimney, which results in waste of water resources. The flue gas purified by the desulfurizing tower is still at a higher temperature, and if the flue gas is preheated for recycling, the coal consumption of boiler combustion can be reduced, and the coal resources can be saved. The existing preheating recovery system generally occupies a large area, is troublesome to operate and is inconvenient to use.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flue gas waste heat and moisture recovery system based on clean flue supports retrieves the waste heat of clean flue gas to with the moisture recycle in the clean flue gas, this system area is little, utilizes the inside current space of clean flue to carry out the heat transfer.
The utility model provides a technical scheme that its technical problem adopted is:
a flue gas waste heat and moisture recovery system based on clean flue support comprises an original flue, a desulfurizing tower, a clean flue of the desulfurizing tower, a clean flue support heat exchanger arranged in the clean flue of the desulfurizing tower, a demineralized water tank for providing a cold source for the clean flue support heat exchanger, a buffer tank for collecting demineralized water subjected to heat exchange with clean flue gas and a deaerator communicated with a water outlet of the buffer tank, wherein the clean flue of the desulfurizing tower is in a rectangular pipeline structure with a downward inclination from a starting end to a tail end; the clean flue supporting heat exchanger comprises a transverse supporting rod, vertical supporting tubes, a lower collecting box, an upper collecting box and a drain tank, wherein the vertical supporting tubes are of a continuously bent S-shaped structure, the vertical supporting tubes are arranged in multiple rows in parallel, the upper ends and the lower ends of the vertical supporting tubes extend out of a wall plate of a clean flue of the desulfurization tower, the initial ends of the vertical supporting tubes are communicated with a water outlet at the top of the lower collecting box arranged at the lower end of the clean flue of the desulfurization tower, and the tail ends of the vertical supporting tubes are communicated with a water inlet of the upper collecting box arranged at the upper end of the clean flue of the desulfurization; the transverse support rods fix the adjacent vertical support tubes and fix the vertical support tube positioned at the foremost row and the vertical support tube positioned at the rearmost row on the clean flue wall plate of the desulfurization tower; the lower header is arranged at one end far away from the desulfurizing tower, the upper header is arranged at one end close to the desulfurizing tower, and the drain tank is arranged on a lower side wall plate of a clean flue of the desulfurizing tower far away from one side of the vertical supporting tube.
Furthermore, the water outlet of the demineralized water tank is communicated with the water inlet of the demineralized water pump, the water outlet of the demineralized water pump is communicated with the water inlet of the first valve, and the water outlet of the first valve is communicated with the water inlet at the lower end of the lower header.
Furthermore, the water outlet of the upper header is communicated with the water inlet of the second valve, the water outlet of the second valve is communicated with the water inlet of the buffer tank, the top of the upper header is also provided with an exhaust port, the exhaust port of the upper header is communicated with the inlet of the third valve, and the outlet of the third valve is communicated with the exhaust pipe.
Furthermore, a water outlet is arranged on the side surface of the water drainage groove, the water outlet of the water drainage groove is communicated with a water inlet of a fourth valve, and a water outlet of the fourth valve is communicated with a water replenishing port of the desulfurizing tower.
Furthermore, fins are welded on two sides of each row of vertical supporting tubes, and the fins are welded and fixed with the connecting parts of the transverse supporting rods and the desulfurization tower clean flue wall plates.
Furthermore, the inner wall of the clean flue of the desulfurizing tower, the outer surface of the vertical supporting tube positioned inside the clean flue of the desulfurizing tower, the outer surface of the fins and the transverse supporting rods are all provided with glass flake anticorrosive coatings.
Furthermore, the outer wall of the clean flue of the desulfurizing tower, the outer surface of the vertical supporting tube extending out of the outer wall of the clean flue of the desulfurizing tower, the outer wall of the lower header and the outer wall of the upper header are all provided with heat preservation layers.
Furthermore, the second valve, the buffer tank, the deaerator and connecting pipelines among the second valve, the buffer tank, the deaerator and the third valve are all provided with external heat-insulating layers.
The utility model has the advantages that: compared with the prior art, the flue gas waste heat and moisture recovery system based on the clean flue support of the utility model has the advantages that the flue gas enters the desulfurizing tower through the original flue, and the flue gas enters the clean flue of the desulfurizing tower after being purified by the desulfurizing tower; the method comprises the following steps that the purified flue gas carries out convective heat exchange with a purified flue supporting heat exchanger in a purified flue of a desulfurizing tower, the purified flue gas is cooled to separate out moisture, the separated moisture is collected to a drainage tank at the bottom of the purified flue along a wall plate of the purified flue of the desulfurizing tower, the drainage tank guides the collected moisture to a water replenishing port of the desulfurizing tower to replenish water to the desulfurizing tower, desalted water is used as a cold source of the purified flue supporting heat exchanger and is guided into the purified flue supporting heat exchanger by a desalted water tank to cool the purified flue gas, and the desalted water enters a buffer tank to be buffered and stabilized in pressure after being heated by the purified flue supporting heat exchanger and is conveyed into a deaerator; the system can reduce the moisture entrainment in the flue gas, plays a role of 'white elimination', can also utilize the flue support in the clean flue to heat up the demineralized water as a heat exchanger, reduces the amount of steam required by the deaerator, and further reduces the coal burning amount of the boiler.
Drawings
FIG. 1 is a system flow diagram of the present invention;
fig. 2 is a schematic structural view of the clean flue supported heat exchanger in area a of fig. 1 according to the present invention (fins not shown);
FIG. 3 is a schematic structural view of a section B-B' of FIG. 2 according to the present invention;
FIG. 4 is a schematic cross-sectional view of the section C-C' of FIG. 2 according to the present invention;
wherein, 1 former flue, 2 desulfurizing towers, 3 clean flues of desulfurizing tower, 4 clean flue support heat exchangers, 5 demineralized water tanks, 6 buffer tanks, 7 deaerators, 8 horizontal bracing pieces, 9 vertical supporting tubes, 10 lower headers, 11 upper headers, 12 drain tanks, 13 demineralized water pumps, 14 first valves, 15 second valves, 16 third valves, 17 fourth valves, 18 fins.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.
In the embodiment shown in fig. 1-4, a flue gas waste heat and moisture recovery system based on clean flue support comprises an original flue 1, a desulfurization tower 2, a desulfurization tower clean flue 3, a clean flue support heat exchanger 4 arranged in the desulfurization tower clean flue, a demineralized water tank 5 providing a cold source for the clean flue support heat exchanger, a buffer tank 6 for collecting demineralized water after heat exchange with clean flue gas, and a deaerator 7 communicated with a water outlet of the buffer tank 6, wherein the desulfurization tower clean flue 3 is in a rectangular pipeline structure with a downward inclination from a starting end to a tail end; the clean flue supporting heat exchanger 4 comprises a transverse supporting rod 8, vertical supporting tubes 9, a lower collecting box 10, an upper collecting box 11 and a drain tank 12, wherein the vertical supporting tubes 9 are of a continuously bent S-shaped structure, the vertical supporting tubes 9 are arranged in multiple rows in parallel, the upper ends and the lower ends of the vertical supporting tubes 9 extend out of the wall plate of the clean flue 3 of the desulfurization tower, the starting ends of the vertical supporting tubes 9 are communicated with a water outlet at the top of the lower collecting box 10 arranged at the lower end of the clean flue 3 of the desulfurization tower, and the tail ends of the vertical supporting tubes are communicated with a water inlet of the upper collecting box 11 arranged at the upper end of the clean flue 3 of the desulfurization; the transverse support rods 8 fix the adjacent vertical support tubes 9, and fix the vertical support tube 9 positioned at the foremost row and the vertical support tube 9 positioned at the rearmost row on the wall plate of the clean flue 3 of the desulfurization tower; lower header 10 sets up in the one end of keeping away from desulfurizing tower 2, go up header 11 and set up in the one end of being close to desulfurizing tower 2, drain trap 12 sets up on lower header 11 keeps away from the lower side wallboard of the clean flue 3 of desulfurizing tower of vertical stay tube 9 one side.
In this embodiment, the water outlet of the demineralized water tank 5 is communicated with the water inlet of the demineralized water pump 13, the water outlet of the demineralized water pump 13 is communicated with the water inlet of the first valve 14, and the water outlet of the first valve 14 is communicated with the water inlet at the lower end of the lower header 10.
In this embodiment, the water outlet of the upper header 11 is communicated with the water inlet of the second valve 15, the water outlet of the second valve 15 is communicated with the water inlet of the buffer tank 6, the top of the upper header 11 is further provided with an exhaust port, the exhaust port of the upper header 11 is communicated with the inlet of the third valve 16, and the outlet of the third valve 16 is communicated with the exhaust pipe.
In this embodiment, a water outlet is disposed on a side surface of the water drainage groove 12, the water outlet of the water drainage groove 12 is communicated with a water inlet of the fourth valve 17, and a water outlet of the fourth valve 17 is communicated with a water replenishing port of the desulfurizing tower 2.
In this embodiment, fins 18 are welded to the front side and the rear side of each row of vertical supporting tubes 9, and the fins 18 are welded and fixed to the joints of the transverse supporting rods 8 and the wall plates of the clean flue 3 of the desulfurization tower.
In this embodiment, the inner wall of the clean flue 3 of desulfurizing tower, the outer surface of the vertical supporting tube 9 located inside the clean flue 3 of desulfurizing tower, the outer surface of the fins 18 and the transverse supporting rod 8 are all provided with glass flake anticorrosive coatings.
In this embodiment, the outer wall of the clean flue 3 of desulfurizing tower, the outer surface of the vertical supporting tube 9 extending out of the outer wall of the clean flue 3 of desulfurizing tower, the outer wall of the lower header 10 and the outer wall of the upper header 11 are all provided with heat insulating layers. And the second valve 15, the buffer tank 6, the deaerator 7 and connecting pipelines among the second valve, the buffer tank, the deaerator and the deaerator are all provided with external heat-insulating layers.
The working principle of the embodiment is as follows: the utility model discloses a flue gas waste heat and moisture recovery system based on clean flue support, flue gas passes through former flue 1 and enters desulfurizing tower 2, and flue gas enters desulfurizing tower clean flue 3 after being purified by desulfurizing tower 2; the clean flue gas carries out convective heat exchange with a clean flue supporting heat exchanger 4 in a clean flue 3 of the desulfurizing tower, the clean flue gas is cooled and separates out moisture, the separated moisture is collected to a drain tank 12 at the bottom of the clean flue along a wall plate of the clean flue 3 of the desulfurizing tower, the drain tank 12 guides the collected moisture to a water replenishing port of the desulfurizing tower 2 and replenishes the desulfurizing tower 2, desalted water is used as a cold source of the clean flue supporting heat exchanger 4 and is introduced into the clean flue supporting heat exchanger 4 through a desalted water pump 13 by a desalted water tank 5, in order to improve the heat exchange efficiency, a countercurrent heat exchange mode is adopted between the desalted water and the flue gas, the desalted water enters a heat exchange tube in the clean flue supporting heat exchanger 4 from a lower header 10, the desalted water is heated by the clean flue supporting heat exchanger 4, is led out from an upper header 11, enters a buffer tank 6 for buffering and pressure stabilizing, and is conveyed; the system can reduce the moisture entrainment in the flue gas, plays a role of 'white elimination', can also utilize the flue support in the clean flue to heat up the demineralized water as a heat exchanger, reduces the amount of steam required by the deaerator, and further reduces the coal burning amount of the boiler.
The above embodiments are only specific cases of the present invention, and the protection scope of the present invention includes but is not limited to the forms and styles of the above embodiments, and any suitable changes or modifications made thereto by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.
Claims (8)
1. The utility model provides a flue gas waste heat and moisture recovery system based on clean flue supports which characterized in that: the device comprises an original flue (1), a desulfurizing tower (2), a desulfurizing tower clean flue (3), a clean flue supporting heat exchanger (4) arranged in the clean flue of the desulfurizing tower, a demineralized water tank (5) for providing a cold source for the clean flue supporting heat exchanger, a buffer tank (6) for collecting demineralized water subjected to heat exchange with clean flue gas and a deaerator (7) communicated with a water outlet of the buffer tank (6), wherein the desulfurizing tower clean flue (3) is of a rectangular pipeline structure which is declined from the starting end to the tail end; the clean flue supporting heat exchanger (4) comprises a transverse supporting rod (8), a vertical supporting pipe (9), a lower header (10), an upper header (11) and a drain tank (12), wherein the vertical supporting pipe (9) is of an S-shaped structure which is continuously bent, a plurality of rows of vertical supporting pipes (9) are arranged in parallel, the upper end and the lower end of each vertical supporting pipe (9) extend out of a wallboard of the clean flue (3) of the desulfurization tower, the initial end of each vertical supporting pipe (9) is communicated with a top water outlet of the lower header (10) arranged at the lower end of the clean flue (3) of the desulfurization tower, and the tail end of each vertical supporting pipe is communicated with a water inlet of the upper header (11) arranged at the upper end of the clean flue (3) of the; the transverse supporting rods (8) fix the adjacent vertical supporting tubes (9) and fix the vertical supporting tube (9) positioned at the foremost row and the vertical supporting tube (9) positioned at the rearmost row on the wall plate of the clean flue (3) of the desulfurization tower; lower header (10) set up in the one end of keeping away from desulfurizing tower (2), go up header (11) and set up in the one end that is close to desulfurizing tower (2), drain tank (12) set up under on header (10) keep away from the lower side wallboard of desulfurizing tower clean flue (3) of vertical stay tube (9) one side.
2. The flue gas waste heat and moisture recovery system based on clean flue support of claim 1, wherein: the water outlet of the desalted water tank (5) is communicated with the water inlet of the desalted water pump (13), the water outlet of the desalted water pump (13) is communicated with the water inlet of the first valve (14), and the water outlet of the first valve (14) is communicated with the water inlet at the lower end of the lower header (10).
3. The flue gas waste heat and moisture recovery system based on clean flue support of claim 1, wherein: the water outlet of the upper header (11) is communicated with the water inlet of the second valve (15), the water outlet of the second valve (15) is communicated with the water inlet of the buffer tank (6), the top of the upper header (11) is also provided with an exhaust port, the exhaust port of the upper header (11) is communicated with the inlet of the third valve (16), and the outlet of the third valve (16) is communicated with the exhaust pipe.
4. The flue gas waste heat and moisture recovery system based on clean flue support of claim 1, wherein: a water outlet is arranged on the side surface of the water drainage groove (12), the water outlet of the water drainage groove (12) is communicated with a water inlet of the fourth valve (17), and a water outlet of the fourth valve (17) is communicated with a water replenishing port of the desulfurizing tower (2).
5. The flue gas waste heat and moisture recovery system based on clean flue support of claim 1, wherein: fins (18) are welded on two sides of each row of vertical supporting tubes (9), and the fins (18) are welded and fixed with the connecting parts of the transverse supporting rods (8) and the wall plates of the desulfurizing tower clean flue (3).
6. The clean flue gas duct support based flue gas waste heat and moisture recovery system of claim 5, wherein: the inner wall of the clean flue (3) of the desulfurizing tower, the outer surface of the vertical supporting tube (9) positioned inside the clean flue (3) of the desulfurizing tower, the outer surface of the fins (18) and the transverse supporting rod (8) are all provided with glass flake anticorrosive coatings.
7. The flue gas waste heat and moisture recovery system based on clean flue support of claim 1, wherein: the outer wall of the clean flue (3) of the desulfurizing tower, the outer surface of a vertical supporting pipe (9) extending out of the outer wall of the clean flue (3) of the desulfurizing tower, the outer wall of the lower header (10) and the outer wall of the upper header (11) are all provided with heat insulating layers.
8. The clean flue gas duct support based flue gas waste heat and moisture recovery system of claim 3, wherein: and the second valve (15), the buffer tank (6), the deaerator (7) and connecting pipelines among the second valve, the buffer tank, the deaerator and the deaerator are all provided with external heat-insulating layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921294198.3U CN210532420U (en) | 2019-08-12 | 2019-08-12 | Flue gas waste heat and moisture recovery system based on clean flue supports |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921294198.3U CN210532420U (en) | 2019-08-12 | 2019-08-12 | Flue gas waste heat and moisture recovery system based on clean flue supports |
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| Publication Number | Publication Date |
|---|---|
| CN210532420U true CN210532420U (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921294198.3U Active CN210532420U (en) | 2019-08-12 | 2019-08-12 | Flue gas waste heat and moisture recovery system based on clean flue supports |
Country Status (1)
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|---|---|
| CN (1) | CN210532420U (en) |
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2019
- 2019-08-12 CN CN201921294198.3U patent/CN210532420U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A flue gas waste heat and moisture recovery system based on clean flue support Effective date of registration: 20210621 Granted publication date: 20200515 Pledgee: Dongyinggang sub branch of Dongying Rural Commercial Bank Co.,Ltd. Pledgor: Dongying Gangcheng Thermal Power Co.,Ltd. Registration number: Y2021980004978 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230206 Granted publication date: 20200515 Pledgee: Dongyinggang sub branch of Dongying Rural Commercial Bank Co.,Ltd. Pledgor: Dongying Gangcheng Thermal Power Co.,Ltd. Registration number: Y2021980004978 |