CN216976798U - Air draft system for preventing odor from overflowing during start-stop of waste incineration power plant - Google Patents
Air draft system for preventing odor from overflowing during start-stop of waste incineration power plant Download PDFInfo
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- CN216976798U CN216976798U CN202123315049.0U CN202123315049U CN216976798U CN 216976798 U CN216976798 U CN 216976798U CN 202123315049 U CN202123315049 U CN 202123315049U CN 216976798 U CN216976798 U CN 216976798U
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- air
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- 238000004056 waste incineration Methods 0.000 title claims abstract description 18
- 230000002265 prevention Effects 0.000 claims abstract description 6
- 239000010813 municipal solid waste Substances 0.000 claims description 30
- 230000003584 silencer Effects 0.000 claims description 19
- 238000000605 extraction Methods 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 13
- 239000000779 smoke Substances 0.000 abstract description 12
- 239000002699 waste material Substances 0.000 abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003546 flue gas Substances 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model provides a prevent that waste incineration power plant from opening and stopping excessive exhaust system of foul smell during stove, includes primary air exhaust system and overgrate air exhaust system, owing to still set up primary air furnace roof exhaust duct and overgrate air furnace roof exhaust duct, when burning furnace and be in the off-state or be in the state of just starting the burning, because the furnace temperature is lower, close primary air exhaust system and overgrate air exhaust system's pneumatic fire prevention valve, then open primary air furnace roof exhaust duct and overgrate air furnace roof exhaust duct, primary air exhaust system and overgrate air system are followed the furnace roof air draft respectively. Because the wind above the furnace top is clean, the surrounding environment is not influenced when the smoke is discharged into the air through the chimney. Avoid because the furnace temperature is lower when waste incinerator opens and stops the stove, the flue gas of discharging to the sky through the chimney contains obvious stink, solve prior art problem effectively.
Description
Technical Field
The utility model relates to an exhaust system of an incinerator of a waste incineration power plant, in particular to an exhaust system for preventing odor from overflowing during the start and stop of the incinerator of the waste incineration power plant.
Background
At present, in order to maintain the negative pressure of a garbage pool and prevent odor from overflowing, primary air and secondary air are extracted from the garbage pool in a garbage incineration power plant. When the incinerator normally operates, because the odor extracted from the garbage pool at a high furnace temperature (above 850 ℃) is subjected to high-temperature decomposition and is treated by a subsequent flue gas treatment system, the odor cannot be smelled in the flue gas discharged from the chimney, and only light smoke smell exists. However, if the primary air and the secondary air are still extracted from the garbage pool in the starting and stopping processes of the incinerator, at the moment, because the incinerator temperature is low, the odor extracted from the garbage pool cannot be fully decomposed in the incinerator, even if the odor passes through a subsequent smoke treatment system, the smoke flying out of a chimney can still smell obvious odor of the garbage pool, because the chimney is high in influence range and wide in influence range, the odor often flies out of the range of 3-5 kilometers and even farther, the life of surrounding residents is influenced, and complaints are suffered.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the prior art, the utility model provides an air draft system for preventing odor from overflowing during the start-stop of a waste incineration power plant, wherein a primary air draft system and a secondary air draft system are respectively added with an air draft pipeline capable of extracting air from a boiler room (over the top of a furnace) while primary air and secondary air are exhausted from a waste pool, during the start-stop process of the incinerator, the primary air draft system and the secondary air draft system are respectively switched to extract odorless air from the boiler room, and after the incinerator is normally combusted and the temperature of the incinerator reaches above 850 ℃, the primary air draft system and the secondary air draft system are switched to extract air from the waste pool. The problem of current waste incinerator open the stove in-process discharge the foul smell to the sky through the chimney is solved.
The technical scheme adopted by the utility model for solving the technical problem is as follows: an air draft system for preventing odor from overflowing during the start and stop of a waste incineration power plant comprises a primary air draft system and a secondary air draft system;
the primary air exhaust system comprises a primary air pipeline, and a primary air inlet filter screen, a primary air pneumatic fire valve, a primary air silencer, a first electric shutoff valve, a primary air fan, a second electric shutoff valve, a primary air preheater, a secondary air preheater and a third electric shutoff valve are sequentially arranged on the primary air pipeline according to the air flowing direction, and air in the garbage pool sequentially passes through the primary air inlet filter screen, the primary air pneumatic fire valve, the primary air silencer, the first electric shutoff valve, the primary air fan, the second electric shutoff valve, the primary air preheater, the secondary air preheater and the third electric shutoff valve and finally enters the bottom of the fire grate;
the secondary air draft system comprises a secondary air pipeline, and a secondary air inlet filter screen, a secondary air pneumatic fire valve, a secondary air silencer, an electric shutoff valve and a secondary air fan are sequentially arranged on the secondary air pipeline according to the air flowing direction, and the air in the garbage pool sequentially passes through the secondary air inlet filter screen, the secondary air pneumatic fire valve, the secondary air silencer, the electric shutoff valve and the secondary air fan and finally enters the hearth;
the device is characterized by also comprising a primary air furnace top air draft pipeline, wherein an inlet of the primary air furnace top air draft pipeline is the upper space of the furnace top, an outlet of the primary air furnace top air draft pipeline is connected to the primary air pipeline, an access point is positioned behind the primary air pneumatic fire valve and in front of a primary air silencer, and a primary air pneumatic adjusting valve is also arranged on the primary air furnace top air draft pipeline;
still set up overgrate air furnace roof exhaust duct, the entry of overgrate air furnace roof exhaust duct is the furnace roof and the export inserts overgrate air duct and the access point is located behind the pneumatic fire prevention valve of overgrate air, before the overgrate air muffler still set up overgrate air pneumatic control valve on the overgrate air furnace roof exhaust duct.
Preferably, a slag extractor steam pipeline is further connected to the primary air pipeline between the second pneumatic valve and the secondary air silencer, and steam of the slag extractor is extracted into the primary air pipeline through the slag extractor steam pipeline, so that negative pressure is formed inside the slag extractor, and odor is prevented from overflowing.
Preferably, a primary steam extraction pipeline of a steam turbine is further arranged, and steam flows into the primary air preheater through the primary steam extraction pipeline of the steam turbine to heat primary air.
Preferably, a steam drum extraction pipeline is further arranged, and steam flows into the secondary air preheater through the steam drum extraction pipeline to heat primary air.
Preferably, a primary air preheater bypass is also provided, the primary air preheater bypass having an inlet opening into the primary air duct and an access point located after the primary air blower and before the second electrically-operated shutoff valve.
Preferably, a fourth electric shutoff valve is further arranged on the bypass of the primary air preheater.
When the incinerator is just started to burn or stops burning, the primary air pneumatic fire valve of the primary air draft system is closed due to the lower temperature of the hearth, then the primary air pneumatic regulating valve of the primary air furnace top draft pipeline is opened, and the primary air draft system drafts air from the top of the furnace (odor cannot be cracked due to the lower temperature of the hearth, so that the odor cannot be drafted from a garbage pool); the air above the furnace top is clean, so the air can be discharged through a chimney without influencing the surrounding environment;
when the incinerator enters normal combustion (the incinerator temperature is above 850 ℃), a primary air pneumatic fire valve of the primary air draft system is opened, then a primary air pneumatic regulating valve of a primary air furnace top draft pipeline is closed, the primary air draft system drafts air from the garbage pool, and due to the fact that the hearth temperature is high, odor of the garbage pool is discharged through a chimney after high-temperature cracking and dust removal treatment (the odor is fully cracked at high temperature when the incinerator temperature is above 850 ℃, then does not contain odor, and does not affect the external environment after being discharged).
On the other hand, the primary air is pumped from the garbage pool to form negative pressure in the garbage pool so as to prevent odor from overflowing to the inside and the surrounding environment of the plant area.
The utility model has the beneficial effects that the air draft system for preventing odor from overflowing during the start-up and shut-down of the waste incineration power plant comprises a primary air draft system and a secondary air draft system, and is also provided with a primary air furnace top air draft pipeline and a secondary air furnace top air draft pipeline, when the incinerator is in a closed state or a state of just starting combustion, the pneumatic fire prevention valves of the primary air draft system and the secondary air draft system are closed due to the lower temperature of a hearth, and then the primary air furnace top air draft pipeline and the secondary air furnace top air draft pipeline are opened, and the primary air draft system and the secondary air draft system respectively draft air from the top of the incinerator. Because the air above the furnace top is clean, the surrounding environment is not influenced when the smoke is discharged into the air through the chimney. Avoid because the furnace temperature is lower when the waste incinerator is started and stopped, the flue gas that discharges to the sky through the chimney contains obvious stink, solve prior art problem effectively.
Drawings
Fig. 1 and 2 are arrangement diagrams of equipment of an air extraction system of a conventional waste incineration power plant. Wherein, fig. 1 is a primary air draft system, and fig. 2 is a secondary air draft system.
Fig. 3 and 4 are layout views of the apparatus according to the first embodiment of the present invention. Wherein, fig. 3 is a primary air draft system, and fig. 4 is a secondary air draft system.
In the figure:
1. a primary air draft system;
1.1 primary air inlet filter screen, 1.2 primary air pneumatic fire valve, 1.3 primary air silencer, 1.4 first electric shutoff valve, 1.5 primary air fan, 1.6 second electric shutoff valve, 1.71 primary air preheater, 1.72 secondary air preheater, 1.8 third electric shutoff valve;
1A primary air furnace top air suction pipeline, 1A1 primary air pneumatic regulating valve and 1A2 furnace top air;
1B, a slag extractor steam pipeline;
a primary steam extraction pipeline of the 1C steam turbine;
1D, extracting steam from a steam drum to a pipeline;
1E air preheater bypass, 1E1 fourth electrically powered shutoff valve;
2. a secondary air draft system;
2.1 secondary air inlet filter screen, 2.2 secondary air pneumatic fire valve, 2.3 secondary air silencer, 2.4 electric shut-off valve, 2.5 secondary air fan;
2A primary air furnace top air suction pipeline and 2A1 secondary air pneumatic regulating valve;
3, a garbage pool;
4 the top of the furnace is empty.
Detailed Description
Fig. 1 and 2 are arrangement diagrams of an apparatus according to a first embodiment of the present invention. In the present embodiment, the exhaust system for preventing odor from overflowing during the start-up and shut-down of the waste incineration power plant comprises a primary air exhaust system 1 and a secondary air exhaust system 2.
The primary air draft system 1 comprises a primary air pipeline and is in accordance with the air flowing direction, a primary air inlet filter screen 1.1, a primary air pneumatic fire-proof valve 1.2, a primary air silencer 1.3, a first electric shutoff valve 1.4, a primary air fan 1.5, a second electric shutoff valve 1.6, a primary air preheater 1.71, a secondary air preheater 1.72 and a third electric shutoff valve 1.8 are sequentially arranged on the primary air pipeline, and air in the garbage pool sequentially passes through the primary air inlet filter screen 1.1, the primary air pneumatic fire-proof valve 1.2, the primary air silencer 1.3, the first electric shutoff valve 1.4, the primary air fan 1.5, the second electric shutoff valve 1.6, the primary air preheater 1.71, the secondary air preheater 1.72 and the third electric shutoff valve 1.8 and finally enters the bottom of a fire grate.
Overgrate air exhaust system 2 includes the overgrate air pipeline, and is in according to the air flow direction still set gradually overgrate air import filter screen 2.1, the pneumatic fire prevention valve of overgrate air 2.2, overgrate air muffler 2.3, electronic shutoff valve 2.4, overgrate air fan 2.5 on the overgrate air pipeline 2, the air in the rubbish pond passes through in proper order overgrate air import filter screen 2.1, the pneumatic fire prevention valve of overgrate air 2.2, overgrate air muffler 2.3, electronic shutoff valve 2.4, overgrate air fan 2.5 get into furnace at last.
In the daily operation process of a waste incineration power plant, in order to prevent the odor in the waste pool from overflowing, the air negative pressure of the waste pool must be maintained. Therefore, the primary air draft system 1 and the secondary air draft system 2 respectively draw air from the garbage pool and then respectively convey the air to the furnace below the grate and the furnace above the grate of the garbage incinerator. The primary air and the secondary air are used for promoting the garbage combustion. After the primary air and the secondary air are combusted, the primary air and the secondary air are treated by the flue gas treatment system and then discharged into the air through a chimney.
In the daily operation process of a waste incineration power plant, air extracted from a waste pool 3 by a primary air extraction system 1 and a secondary air extraction system 2 is combusted in a hearth, substances in odor are decomposed at high temperature after the temperature of the furnace is high (above 850 ℃), and after the combusted smoke is treated by a subsequent smoke treatment system, the smoke exhausted from a chimney can not smell the odor and has only light smoke smell.
However, when the incinerator starts to burn or the incinerator stops running, if the primary air draft system 1 and the secondary air draft system 2 still continue to draw air from the garbage pool 3, odor extracted from the garbage pool cannot be fully decomposed in the incinerator due to low furnace temperature, and even if the smoke is treated by a subsequent smoke treatment system, the smoke flowing out from a chimney can still smell obvious garbage odor. Because the chimney is higher, therefore the influence scope is wider, and the foul smell often can drift to the periphery 3 to 5 kilometers away, seriously influences the air health of surrounding environment.
In order to solve the problems in the prior art, in the embodiment, a primary air furnace roof draft duct 1A is further provided, an inlet of the primary air furnace roof draft duct 1A is connected to the upper space 4 of the incinerator furnace roof, an outlet of the primary air furnace roof draft duct 1A is connected to the primary air duct, an access point is positioned behind a primary air pneumatic fire damper 1.2 and in front of a primary air silencer 1.3, and a primary air pneumatic regulating valve 1A1 is further arranged on the primary air furnace roof draft duct 1A.
And a secondary air furnace top draft pipeline 2A is also arranged, the inlet of the secondary air furnace top draft pipeline 2A is connected to the upper space 4 of the furnace top of the incinerator, the outlet of the secondary air furnace top draft pipeline 2A is connected to the secondary air pipeline, an access point is positioned behind the secondary air pneumatic fire damper 2.2 and in front of a secondary air silencer 2.3, and a secondary air pneumatic adjusting valve 2A1 is also arranged on the secondary air furnace top draft pipeline 2A.
Preferably, a slag tapping machine steam pipeline 1B is connected to the primary air pipeline between the primary air pneumatic fire damper 1.2 and the primary air silencer 1.3, and steam of a slag tapping machine is extracted into the primary air pipeline through the slag tapping machine steam pipeline 1B, so that negative pressure is formed inside the slag tapping machine, and odor is prevented from overflowing.
Preferably, a turbine primary extraction duct 1C is provided, through which steam flows into the primary air preheater 1.71 to heat the primary air.
It is shown that preferably a drum extraction line 1D is also provided, through which steam flows from the line 1D into the secondary air preheater 1.72 for heating the primary air.
It is shown that preferably a primary air preheater bypass 1E is also provided, the inlet of which primary air preheater bypass 1E opens into the primary air duct and the opening is located after the primary air fan 1.5 and before the second electrically actuable shut-off valve 1.6. The primary air preheater bypass 1E is also provided with a fourth electric shutoff valve 1E 1.
In the technical scheme provided by the utility model, when the incinerator is just started to burn, the primary air pneumatic fire valve 1.2 of the primary air exhaust system is closed due to the lower temperature of the hearth, then the primary air pneumatic regulating valve 1A1 of the primary air furnace top exhaust pipeline 1A is opened, and the primary air exhaust system 1 exhausts air from the furnace top (because the temperature of the hearth is lower, odor cannot be cracked, and therefore cannot exhaust air from a garbage pool); because the wind above the furnace top is clean, the wind can be discharged through a chimney without influencing the surrounding environment.
When the incinerator is in normal combustion (the furnace temperature is above 850 ℃), the primary air pneumatic fire valve 1.2 of the primary air draft system 1 is opened, then the primary air pneumatic regulating valve 1A1 of the primary air furnace top draft pipeline 1A is closed, the primary air draft system 1 drafts air from the garbage pool, and due to the fact that the temperature of the hearth is high, odor of the garbage pool is exhausted through a chimney after being subjected to high-temperature cracking and dust removal treatment (the odor is fully cracked by high temperature when the temperature of the incinerator is above 850 ℃, does not contain odor any more, and does not affect the external environment after being exhausted).
Meanwhile, the primary air system 1 can form negative pressure above the garbage pool 3 by pumping air from the garbage pool, so that odor is prevented from overflowing to the inside of a plant area and the surrounding environment.
Claims (6)
1. An air draft system for preventing odor from overflowing during the start and stop of a waste incineration power plant comprises a primary air draft system and a secondary air draft system;
the primary air exhaust system comprises a primary air pipeline, and a primary air inlet filter screen, a primary air pneumatic fire valve, a primary air silencer, a first electric shutoff valve, a primary air fan, a second electric shutoff valve, a primary air preheater, a secondary air preheater and a third electric shutoff valve are sequentially arranged on the primary air pipeline according to the air flowing direction, and air in the garbage pool sequentially passes through the primary air inlet filter screen, the primary air pneumatic fire valve, the primary air silencer, the first electric shutoff valve, the primary air fan, the second electric shutoff valve, the primary air preheater, the secondary air preheater and the third electric shutoff valve and finally enters the bottom of the fire grate;
the secondary air draft system comprises a secondary air pipeline, and a secondary air inlet filter screen, a secondary air pneumatic fire valve, a secondary air silencer, an electric shutoff valve and a secondary air fan are sequentially arranged on the secondary air pipeline according to the air flowing direction, and the air in the garbage pool sequentially passes through the secondary air inlet filter screen, the secondary air pneumatic fire valve, the secondary air silencer, the electric shutoff valve and the secondary air fan and finally enters the hearth;
the device is characterized by also comprising a primary air furnace top air draft pipeline, wherein an inlet of the primary air furnace top air draft pipeline is the upper space of the furnace top, an outlet of the primary air furnace top air draft pipeline is connected to the primary air pipeline, an access point is positioned behind the primary air pneumatic fire valve and in front of a primary air silencer, and a primary air pneumatic adjusting valve is also arranged on the primary air furnace top air draft pipeline;
still set up overgrate air furnace roof exhaust duct, the entry of overgrate air furnace roof exhaust duct is the furnace roof and the export inserts overgrate air duct and the access point is located behind the pneumatic fire prevention valve of overgrate air, before the overgrate air muffler still set up overgrate air pneumatic control valve on the overgrate air furnace roof exhaust duct.
2. The air draft system for preventing the odor from overflowing during the start and stop of the waste incineration power plant as claimed in claim 1, wherein a slag extractor steam pipeline is further connected between the second pneumatic valve and the secondary air silencer on the primary air pipeline, and the steam of the slag extractor is extracted into the primary air pipeline through the slag extractor steam pipeline, so that negative pressure is formed inside the slag extractor to prevent the odor from overflowing.
3. The air extraction system for preventing the odor from overflowing during the start-stop of the waste incineration power plant as claimed in claim 1, wherein a primary steam extraction pipeline of a steam turbine is further arranged, and steam flows into the primary air preheater through the primary steam extraction pipeline of the steam turbine to heat primary air.
4. The air draft system for preventing the odor from overflowing during the start-stop of the waste incineration power plant as claimed in claim 1, wherein a drum steam extraction pipeline is further arranged, and steam flows into the secondary air preheater through the drum steam extraction pipeline to heat primary air.
5. The air draft system for preventing the odor from overflowing during the start-stop of the waste incineration power plant as claimed in claim 1, wherein a primary air preheater bypass is further provided, an inlet of the primary air preheater bypass is connected to the primary air pipeline, and an access point is located behind the primary air fan and in front of the second electric shutoff valve.
6. The air draft system for preventing the odor from overflowing during the start and stop of the waste incineration power plant as claimed in claim 5, wherein a fourth electric shutoff valve is further arranged on the side of the primary air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123315049.0U CN216976798U (en) | 2021-12-27 | 2021-12-27 | Air draft system for preventing odor from overflowing during start-stop of waste incineration power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123315049.0U CN216976798U (en) | 2021-12-27 | 2021-12-27 | Air draft system for preventing odor from overflowing during start-stop of waste incineration power plant |
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| Publication Number | Publication Date |
|---|---|
| CN216976798U true CN216976798U (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123315049.0U Active CN216976798U (en) | 2021-12-27 | 2021-12-27 | Air draft system for preventing odor from overflowing during start-stop of waste incineration power plant |
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| CN (1) | CN216976798U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023124588A1 (en) * | 2021-12-27 | 2023-07-06 | 深圳能源环保股份有限公司 | Air draft system for preventing odor from escaping during furnace starting and stopping in waste incineration power plant |
-
2021
- 2021-12-27 CN CN202123315049.0U patent/CN216976798U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023124588A1 (en) * | 2021-12-27 | 2023-07-06 | 深圳能源环保股份有限公司 | Air draft system for preventing odor from escaping during furnace starting and stopping in waste incineration power plant |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Tang Yongquan Inventor before: Song Qi |
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| CB03 | Change of inventor or designer information |