CN221222740U - Device suitable for boiler flue gas waste heat recovery - Google Patents
Device suitable for boiler flue gas waste heat recovery Download PDFInfo
- Publication number
- CN221222740U CN221222740U CN202323053113.1U CN202323053113U CN221222740U CN 221222740 U CN221222740 U CN 221222740U CN 202323053113 U CN202323053113 U CN 202323053113U CN 221222740 U CN221222740 U CN 221222740U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- heat exchanger
- gas pipeline
- boiler
- waste heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000003546 flue gas Substances 0.000 title claims abstract description 46
- 239000002918 waste heat Substances 0.000 title claims abstract description 18
- 238000011084 recovery Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000000779 smoke Substances 0.000 claims description 11
- 238000004090 dissolution Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 239000007789 gas Substances 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 239000002737 fuel gas Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 238000000605 extraction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
Abstract
The utility model belongs to the technical field of power generation and heat supply of coal-fired boilers, and discloses a device suitable for boiler flue gas waste heat recovery, which comprises a boiler body, wherein one side of the boiler body is connected with a first flue gas pipeline, one side of the first flue gas pipeline, which is far away from the boiler body, is connected with a surface type heat exchanger, the other side of the surface type heat exchanger is connected with a second flue gas pipeline, one side of the second flue gas pipeline, which is far away from the surface type heat exchanger, is provided with a suction fan, a flue gas baffle is arranged on the second flue gas pipeline, one end of the surface type heat exchanger is connected with a denitration process water inlet pipe, and the other end of the surface type heat exchanger is connected with a denitration process water drain pipe=. The utility model utilizes the waste heat of fuel gas to heat raw water, the heated raw water replaces the gas exhaust or heat supply primary hot water of the steam turbine as denitration process water, and the flue gas after the waste heat utilization is recycled for low-nitrogen combustion to reduce the initial emission concentration of pollutants, thereby saving energy and reducing emission and having low use cost.
Description
Technical Field
The utility model relates to the technical field of power generation and heat supply of coal-fired boilers, in particular to a device suitable for boiler flue gas waste heat recovery.
Background
Because the existing denitration process water matched with the coal-fired boiler has higher temperature requirements, a general power plant takes a steam turbine for air extraction and a heating project takes a net of high-temperature hot water. The heat circulation working medium which is subjected to chemical treatment is used as both air extraction and net water, so that the cost is high, and the heat circulation efficiency is affected by mass use. For the related art problems, no solution has been proposed yet.
Disclosure of utility model
Aiming at the problems in the related art, the utility model provides a device suitable for recovering the waste heat of the flue gas of a boiler, so as to overcome the technical problems in the prior related art, and the utility model aims to utilize the waste heat of the flue gas of the coal-fired boiler to heat raw water to replace deoxidized water as process water of a denitration system; the flue gas which utilizes the excess heat is recycled to enter a combustion zone of a hearth of the coal-fired boiler and is mixed with high-temperature flue gas, and a low-nitrogen combustion technology is used for achieving the purposes of controlling, reducing the initial emission concentration of nitrogen oxides of the boiler, saving energy and reducing emission.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a device suitable for boiler flue gas waste heat recovery, includes the boiler body, the inside of boiler body is provided with furnace, one side of boiler body is connected with first flue gas pipeline, one side that the boiler body was kept away from to first flue gas pipeline is connected with surface formula heat exchanger, the opposite side of surface formula heat exchanger is connected with the second flue gas pipeline, one side that surface formula heat exchanger was kept away from to the second flue gas pipeline is provided with the suction fan, install the flue gas baffle on the second flue gas pipeline, the other end of suction fan is connected with the afterbody flue, the one end of surface formula heat exchanger is connected with denitration process water inlet tube, the other end of surface formula heat exchanger is connected with denitration process water drain pipe.
Preferably, one end of the denitration process water drain pipe far away from the surface heat exchanger is connected with a denitration dissolution preparation device.
Preferably, the smoke baffle is an adjustable smoke baffle.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model relates to a device suitable for recovering waste heat of boiler flue gas, which utilizes waste heat of flue gas of a coal-fired boiler to heat raw water to replace deoxidized water as process water of a denitration system; the flue gas which utilizes the excess heat is recycled to enter a combustion zone of a hearth of the coal-fired boiler and is mixed with high-temperature flue gas, and a low-nitrogen combustion technology is used for achieving the purposes of controlling, reducing the initial emission concentration of nitrogen oxides of the boiler, saving energy and reducing emission.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
In the reference numerals: 1. a boiler body; 2. a first flue gas duct; 3. a surface heat exchanger; 4. a second flue gas duct; 5. a suction fan; 6. a smoke baffle; 7. a tail flue; 8. a denitration process water inlet pipe; 9. a denitration process water drain pipe; 10. denitration dissolving preparation facilities.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Examples
Referring to fig. 1, the utility model provides a technical scheme of a device suitable for recovering waste heat of boiler flue gas, which comprises the following steps: the utility model provides a device suitable for boiler flue gas waste heat recovery, including boiler body 1, the inside of boiler body 1 is provided with furnace, one side of boiler body 1 is connected with first flue pipe 2, one side that boiler body 1 was kept away from to first flue pipe 2 is connected with surface formula heat exchanger 3, specifically, surface formula heat exchanger 3 adopts prior art, the opposite side of surface formula heat exchanger 3 is connected with second flue pipe 4, one side that surface formula heat exchanger 3 was kept away from to second flue pipe 4 is provided with suction fan 5, install flue baffle 6 on the second flue pipe 4, the other end of suction fan 5 is connected with afterbody flue 7, the one end of surface formula heat exchanger 3 is connected with denitration process water inlet tube 8, the other end of surface formula heat exchanger 3 is connected with denitration process water drain pipe 9.
In the embodiment, the smoke enters the hearth combustion area of the boiler body 1 after the smoke enters the surface heat exchanger 3 to exchange heat by the smoke baffle 6 and enters the surface heat exchanger 4 to give water; the denitration process water enters a denitration system through a denitration process water drain pipe 9 after raw water source enters a surface heat exchanger 3 through a denitration process water inlet pipe 8 for heating, and a first flue gas pipeline 2, a second flue gas pipeline 4, a denitration process water inlet pipe 8 and a denitration process water drain pipe 9 are components for realizing trend of working media; the surface heat exchanger 3 is a heat exchange member. Referring to fig. 1, a denitration dissolution preparation device 10 is further connected to one end of the denitration process water drain pipe 9 away from the surface heat exchanger 3.
In this embodiment, the denitration dissolution preparing apparatus 10 adopts the prior art.
Referring to fig. 1, further, the smoke baffle 6 is an adjustable smoke baffle.
In the embodiment, the size of the smoke wind is convenient to adjust.
The working principle of the utility model is as follows:
Part of the flue gas is extracted at the outlet of the suction fan 5 along the flow direction of the boiler flue gas, raw water is heated by the surface heat exchanger 3, and the raw water after heating is used as denitration process water to replace the gas extraction of the steam turbine or heat supply primary hot water, so that the use of a water-treated circulating working medium with higher cost is avoided, the flue gas waste heat is utilized, and the circulating heat efficiency is improved; and meanwhile, the flue gas after waste heat enters a hearth combustion zone of the boiler body 1, and the purpose of reducing the initial concentration of nitrogen oxides by low-nitrogen combustion is realized by a flue gas recirculation means.
In the description of the present utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a device suitable for boiler flue gas waste heat recovery, includes boiler body (1), the inside of boiler body (1) is provided with furnace, a serial communication port, one side of boiler body (1) is connected with first flue gas pipeline (2), one side that boiler body (1) was kept away from to first flue gas pipeline (2) is connected with surface heat exchanger (3), the opposite side of surface heat exchanger (3) is connected with second flue gas pipeline (4), one side that surface heat exchanger (3) was kept away from to second flue gas pipeline (4) is provided with suction fan (5), install flue gas baffle (6) on second flue gas pipeline (4), the other end of suction fan (5) is connected with tail flue (7), one end of surface heat exchanger (3) is connected with denitration process water inlet tube (8), the other end of surface heat exchanger (3) is connected with denitration process water drain pipe (9).
2. A device suitable for use in boiler flue gas waste heat recovery as claimed in claim 1, wherein: one end of the denitration process water drain pipe (9) far away from the surface heat exchanger (3) is connected with a denitration dissolution preparation device (10).
3. A device suitable for use in boiler flue gas waste heat recovery as claimed in claim 1, wherein: the smoke baffle (6) is an adjustable smoke baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323053113.1U CN221222740U (en) | 2023-11-13 | 2023-11-13 | Device suitable for boiler flue gas waste heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323053113.1U CN221222740U (en) | 2023-11-13 | 2023-11-13 | Device suitable for boiler flue gas waste heat recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221222740U true CN221222740U (en) | 2024-06-25 |
Family
ID=91542330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323053113.1U Active CN221222740U (en) | 2023-11-13 | 2023-11-13 | Device suitable for boiler flue gas waste heat recovery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221222740U (en) |
-
2023
- 2023-11-13 CN CN202323053113.1U patent/CN221222740U/en active Active
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