CN213853843U - Thermal power tail gas treatment equipment - Google Patents
Thermal power tail gas treatment equipment Download PDFInfo
- Publication number
- CN213853843U CN213853843U CN202022698120.7U CN202022698120U CN213853843U CN 213853843 U CN213853843 U CN 213853843U CN 202022698120 U CN202022698120 U CN 202022698120U CN 213853843 U CN213853843 U CN 213853843U
- Authority
- CN
- China
- Prior art keywords
- thermal power
- dust collector
- reaction tower
- tail gas
- pipeline
- 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.)
- Withdrawn - After Issue
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000428 dust Substances 0.000 claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 16
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 16
- 230000023556 desulfurization Effects 0.000 claims abstract description 16
- 239000002002 slurry Substances 0.000 claims description 22
- 238000010248 power generation Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000012717 electrostatic precipitator Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004537 pulping Methods 0.000 abstract description 4
- 239000004744 fabric Substances 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 17
- 239000003546 flue gas Substances 0.000 description 17
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 239000002956 ash Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
A thermal power tail gas treatment device comprises a denitration system connected with a boiler, a desulfurization system connected with the denitration system and an electrostatic dust collector arranged between the denitration system and the desulfurization system, wherein the denitration system comprises a denitration reactor and an ammonia supply system, the ammonia supply system comprises a liquid ammonia tank, an evaporator, a pressure accumulator and a mixer, the desulfurization system comprises a reaction tower and a pulping device, a cyclone separator is arranged at the top of the reaction tower, a cloth bag dust collector is connected with the gas outlet of the cyclone separator, the cloth bag dust collector is connected with a chimney, a dust collecting chamber of the cyclone separator is communicated with the gas inlet end of the reaction tower, the gas inlet end of the electrostatic dust collector is communicated with the top of the denitration reactor, and the gas outlet end of the electrostatic dust collector is communicated with the gas inlet end of the reaction tower, SO the device can effectively treat tail gas generated by a thermal power plant, and greatly reduce the content of SO2 and NOx in the tail gas, the pollution of tail gas of a thermal power plant to the environment is reduced.
Description
Technical Field
The utility model relates to a thermal power tail gas treatment field, especially a thermal power tail gas treatment facility.
Background
Flue gas of a coal-fired boiler of a thermal power plant is the most main pollution source in the power industry. The exhaust gas of coal-fired power plants is mainly derived from flue gas generated by boiler combustion. Wherein, the amount of flue gas generated by boiler combustion and the pollutant discharge amount contained in the flue gas are far greater than those of other waste gases, which is the key point of pollution control. Pollutants in flue gas generated by boiler combustion include fly ash, SO2 and NOx, and photochemical reaction can be caused under the action of sunlight to form photochemical smog, SO that serious atmospheric pollution is caused. The harm to human health, acid rain, photochemical smog, ozone reduction and other problems are related to low concentration of NOX and SO2, the harm is much larger than that originally assumed, the smoke of a thermal power plant contains a large amount of NOX and SO2, and the burned smoke must be treated
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a thermal power tail gas treatment facility to solve the problem that proposes in the above-mentioned technical background.
The purpose of the utility model is realized through the following technical scheme:
a thermal power generation tail gas treatment device comprises a denitration system connected with a boiler, a desulfurization system connected with the denitration system and an electrostatic dust collector arranged between the denitration system and the desulfurization system, wherein the denitration system comprises a denitration reactor and an ammonia supply system, the ammonia supply system comprises a liquid ammonia tank, an evaporator, a pressure accumulator and a mixer, the liquid inlet end of the evaporator is connected with the liquid ammonia tank, the gas outlet end of the evaporator is connected with the gas inlet end of the pressure accumulator, the gas outlet end of the pressure accumulator is connected with the mixer, and the mixer is communicated with the top of the denitration reactor; the desulfurization system comprises a reaction tower and a slurry making device, wherein the slurry making device is connected with the air inlet end of the reaction tower through a slurry pump, a slurry outlet pipeline of the slurry pump is sequentially connected with a water pump and a first air compressor, the top of the reaction tower is provided with a cyclone separator, the air outlet of the cyclone separator is connected with a bag-type dust collector, the bag-type dust collector is connected with a chimney, and a dust collecting chamber of the cyclone separator is communicated with the air inlet end of the reaction tower; and the gas inlet end of the electrostatic dust collector is communicated with the bottom of the denitration reactor, and the gas outlet end of the electrostatic dust collector is communicated with the gas inlet end of the reaction tower.
Further, still including supplying ammonia control system, supply ammonia control system including setting up electronic valve, PLC control circuit board and oxynitride sensor on blender outlet pipeline, the oxynitride sensor is located denitration reactor top and is connected with PLC control circuit board electricity, electronic valve is connected with PLC circuit board electricity.
Further, an economizer is arranged between the boiler and the denitration reactor.
Furthermore, a blower is arranged on the air inlet pipeline of the boiler, and an air preheater is arranged between the air inlet pipeline of the boiler and the air outlet pipeline of the denitration reactor.
Furthermore, a draught fan is arranged on a connecting pipeline between the electrostatic dust collector and the reaction tower.
Furthermore, a booster fan is arranged on an exhaust pipeline between the bag-type dust remover and the chimney, and a heat exchanger is arranged between the exhaust pipeline between the bag-type dust remover and the chimney and an air inlet pipeline of the reaction tower.
Further, the mixer is connected with a second air compressor through a pipeline.
Further, the denitration reactor is an SCR denitration reactor.
The utility model has the advantages that: the utility model discloses can carry out effectual processing to the tail gas that thermal power factory produced, great reduction SO2, NOx's in the tail gas content, reduced the pollution of thermal power factory tail gas to the environment.
Drawings
Fig. 1 is a block diagram illustrating the structure of the present invention.
In the figure, 1-boiler, 2-electrostatic precipitator, 3-denitration reactor, 4-liquid ammonia tank, 5-evaporator, 6-pressure accumulator, 7-mixer, 8-reaction tower, 9-pulping device, 10-slurry pump, 11-water pump, 12-first air compressor, 13-cyclone separator, 14-bag dust collector, 15-chimney, 16-electronic valve, 17-PLC control circuit board, 18-nitrogen oxide sensor, 19-economizer, 20-air feeder, 21-air preheater, 22-induced draft fan, 23-booster fan, 24-heat exchanger, 25-second air compressor.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.
Example (b):
a thermal power generation tail gas treatment device, referring to the attached figure 1, comprises a denitration system connected with a boiler 1, a desulphurization system connected with the denitration system and an electrostatic dust collector 2 arranged between the denitration system and the desulphurization system,
the denitration system comprises a denitration reactor 3 and an ammonia supply system, wherein the ammonia supply system comprises a liquid ammonia tank 4, an evaporator 5, a pressure accumulator 6 and a mixer 7, the liquid inlet end of the evaporator 5 is connected with the liquid ammonia tank 4, the gas outlet end of the evaporator 5 is connected with the gas inlet end of the pressure accumulator 6, the gas outlet end of the pressure accumulator 6 is connected with the mixer 7, and the mixer 7 is communicated with the top of the denitration reactor 3;
the desulfurization system comprises a reaction tower 8 and a slurry making device 9, wherein the slurry making device 9 is connected with the air inlet end of the reaction tower 8 through a slurry pump 10, a slurry outlet pipeline of the slurry pump 10 is sequentially connected with a water pump 11 and a first air compressor 12, the top of the reaction tower 8 is provided with a cyclone separator 13, the air outlet of the cyclone separator 13 is connected with a bag-type dust remover 14, the bag-type dust remover 14 is connected with a chimney 15, and a dust collection chamber of the cyclone separator 13 is communicated with the air inlet end of the reaction tower 8; the inlet end of the electrostatic dust collector 2 is communicated with the bottom of the denitration reactor 3, and the outlet end of the electrostatic dust collector 2 is communicated with the inlet end of the reaction tower 8.
The utility model discloses specifically in the course of the work, the waste gas that boiler 1 produced carries out denitration treatment in getting into denitration reactor 3, and specific process is: become the ammonia behind the liquid ammonia jar liquid ammonia process evaporimeter 5, in the rethread accumulator 6 enters into mixing chamber 7, mixes with the air that enters into mixing chamber 7 through second air compressor machine 25 and dilutes, enters into denitration reactor 3 through the pipeline at last and carries out denitration treatment to the flue gas.
The tail gas after denitration is dedusted again through an electrostatic precipitator, and then is desulfurized through a reaction tower 8, specifically, calcium oxide is added into a pulping device 9 for pulping to obtain calcium hydroxide slurry, the prepared calcium hydroxide slurry is pumped out through a slurry pump 10, is diluted by water entering through a water pump 11 and is pressurized by a first air compressor 12 and then is sprayed into the reaction tower 8 in a foggy mode for desulfurization treatment of the flue gas after denitration, the flue gas after desulfurization continuously enters a cyclone separator 13 and a bag-type dust remover 14 upwards to remove most solid particles, the clean flue gas is exhausted into the atmosphere through a chimney 15, and in the process, the solid particles collected by a dust collecting chamber of the cyclone separator 13 are sent into the bottom of the reaction tower 8 again for ash circulation, so that the utilization rate of calcium oxide is reduced.
More specifically, atomized lime slurry is used as an absorbent, a large amount of desulfurization ash is returned to the reaction tower 8, fresh slurry is sprayed from the bottom of the reaction tower 8 through a two-fluid nozzle, collides with circulating ash and is adsorbed on the outer surface of solid materials, and the flow rate of inlet flue gas is adjusted to be stable at a proper value, so that the solid particles can be ensured to be in a suspension state. The flue gas undergoes an absorption reaction with particles suspended in the reaction column 8, the surfaces of which are covered with fresh slurry. In addition, the circulating dry desulfurization product particles can also play a role in scouring the wall surface of the desulfurization tower, so that scaling can be prevented.
Preferably, as shown in fig. 1, the tail gas treatment equipment further includes an ammonia supply control system, the ammonia supply control system includes an electronic valve 16, a PLC control circuit board 17 and an oxynitride sensor 18, the electronic valve 16 is disposed on the outlet pipeline of the mixer 7, the PLC control circuit board 17 is electrically connected to the oxynitride sensor 18, the oxynitride sensor 18 is disposed on the top of the denitration reactor 3 and electrically connected to the PLC control circuit board 17, specifically, the oxynitride sensor 18 can sense the content of oxynitride in flue gas, and the PLC circuit board 17 is further used to control the opening amount of the electronic valve 16, so as to control the amount of ammonia sprayed into the denitration reactor 3.
In the above embodiment, the denitration reactor 3 is preferably an SCR denitration reactor.
In the above embodiment, preferably, an economizer is arranged between the boiler 1 and the denitration reactor 3, so that the utilization rate of the waste heat of the flue gas is improved, the coal is saved, and the emission of the tail gas of the boiler 1 is reduced.
In the above embodiment, preferably, the air supply blower 20 is disposed on the air inlet pipeline of the boiler 1, so that coal in the boiler 1 can be further fully combusted, incomplete combustion products in tail gas are reduced while saving coal, the air preheater 21 is disposed between the air inlet pipeline of the boiler 1 and the air outlet pipeline of the denitration reactor 3, and the air preheater 21 heats air entering the boiler 1 by using heat of flue gas in the air outlet pipeline of the denitration reactor 3, thereby reducing smoke loss, increasing air inlet temperature, increasing combustion efficiency of the boiler, and further reducing emission of tail gas.
In the above embodiment, preferably, the induced draft fan 22 is arranged on the connecting pipeline between the electrostatic dust collector 2 and the reaction tower 8, so as to ensure that the flue gas coming out of the electrostatic dust collector 2 can rapidly enter the reaction tower 8 for desulfurization treatment.
In the above embodiment, preferably, the exhaust pipe between the bag-type dust collector 14 and the chimney 15 is provided with the booster fan 23, so that the flue gas after treatment can be rapidly discharged through the chimney 15, the retention time of the flue gas in the equipment is reduced, and the heat exchanger 24 is arranged between the exhaust pipe between the bag-type dust collector 14 and the chimney 15 and the air inlet pipe of the reaction tower 8, so as to further improve the utilization rate of the coal.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (8)
1. The utility model provides a thermal power tail gas treatment equipment, includes the deNOx systems who is connected with boiler (1), the desulfurization system who is connected with the deNOx systems and sets up electrostatic precipitator (2) between deNOx systems and desulfurization system, its characterized in that:
the denitration system comprises a denitration reactor (3) and an ammonia supply system, wherein the ammonia supply system comprises a liquid ammonia tank (4), an evaporator (5), a pressure accumulator (6) and a mixer (7), the liquid inlet end of the evaporator (5) is connected with the liquid ammonia tank (4), the gas outlet end of the evaporator is connected with the gas inlet end of the pressure accumulator (6), the gas outlet end of the pressure accumulator (6) is connected with the mixer (7), and the mixer (7) is communicated with the top of the denitration reactor (3);
the desulfurization system comprises a reaction tower (8) and a slurry making device (9), wherein the slurry making device (9) is connected with the air inlet end of the reaction tower (8) through a slurry pump (10), a slurry outlet pipeline of the slurry pump (10) is sequentially connected with a water pump (11) and a first air compressor (12), a cyclone separator (13) is arranged at the top of the reaction tower (8), the air outlet of the cyclone separator (13) is connected with a bag-type dust collector (14), the bag-type dust collector (14) is connected with a chimney (15), and a dust collecting chamber of the cyclone separator (13) is communicated with the air inlet end of the reaction tower (8);
the gas inlet end of the electrostatic dust collector (2) is communicated with the bottom of the denitration reactor (3), and the gas outlet end of the electrostatic dust collector (2) is communicated with the gas inlet end of the reaction tower (8).
2. The thermal power generation tail gas treatment equipment according to claim 1, further comprising an ammonia supply control system, wherein the ammonia supply control system comprises an electronic valve (16) arranged on an outlet pipeline of the mixer (7), a PLC (programmable logic controller) control circuit board (17) and an oxynitride sensor (18), the oxynitride sensor (18) is arranged at the top of the denitration reactor (3) and is electrically connected with the PLC control circuit board (17), and the electronic valve (16) is electrically connected with the PLC control circuit board (17).
3. The thermal power generation exhaust gas treatment apparatus according to claim 1, wherein an economizer (19) is provided between the boiler (1) and the denitration reactor (3).
4. The thermal power generation tail gas treatment equipment according to claim 1, wherein a blower (20) is arranged on an air inlet pipeline of the boiler (1), and an air preheater (21) is arranged between the air inlet pipeline of the boiler (1) and an air outlet pipeline of the denitration reactor (3).
5. The thermal power generation tail gas treatment equipment according to claim 1, wherein an induced draft fan (22) is arranged on a connecting pipeline between the electrostatic dust collector (2) and the reaction tower (8).
6. The thermal power generation tail gas treatment equipment according to claim 1, wherein a booster fan (23) is arranged on an exhaust pipeline between the bag-type dust collector (14) and the chimney (15), and a heat exchanger (24) is arranged between the exhaust pipeline between the bag-type dust collector (14) and the chimney (15) and an air inlet pipeline of the reaction tower (8).
7. The thermal power generation tail gas treatment equipment according to claim 1, wherein the mixer (7) is connected with a second air compressor (25) through a pipeline.
8. The thermal power generation exhaust gas treatment apparatus according to claim 1, wherein the denitration reactor (3) is an SCR denitration reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022698120.7U CN213853843U (en) | 2020-11-19 | 2020-11-19 | Thermal power tail gas treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022698120.7U CN213853843U (en) | 2020-11-19 | 2020-11-19 | Thermal power tail gas treatment equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213853843U true CN213853843U (en) | 2021-08-03 |
Family
ID=77035218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022698120.7U Withdrawn - After Issue CN213853843U (en) | 2020-11-19 | 2020-11-19 | Thermal power tail gas treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213853843U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114177751A (en) * | 2021-12-20 | 2022-03-15 | 华能安阳热电有限责任公司 | Thermal power plant is with system of selling off |
-
2020
- 2020-11-19 CN CN202022698120.7U patent/CN213853843U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114177751A (en) * | 2021-12-20 | 2022-03-15 | 华能安阳热电有限责任公司 | Thermal power plant is with system of selling off |
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