CN211011412U - Waste heat furnace tail flue gas waste heat utilization system - Google Patents

Waste heat furnace tail flue gas waste heat utilization system Download PDF

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Publication number
CN211011412U
CN211011412U CN201921438823.7U CN201921438823U CN211011412U CN 211011412 U CN211011412 U CN 211011412U CN 201921438823 U CN201921438823 U CN 201921438823U CN 211011412 U CN211011412 U CN 211011412U
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China
Prior art keywords
flue gas
waste heat
utilization system
air preheater
overgrate air
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CN201921438823.7U
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Chinese (zh)
Inventor
董博
柴建伟
谢嘉瑞
胡泊
刘晓彤
周林
张将军
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Cecep Beijing Energy Saving Environmental Protection Engineering Co ltd
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Cecep Beijing Energy Saving Environmental Protection Engineering Co ltd
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Priority to CN201921438823.7U priority Critical patent/CN211011412U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model provides a waste heat stove afterbody flue gas waste heat utilization system, this system connect after waste heat stove export flue, include flue gas draught fan (1), overgrate air preheater (4) and flue gas forced draught blower (7) in proper order, the pipeline exit of flue gas draught fan (1) sets up first temperature pressure measurement component (2) to set up flue gas inlet valve (3), flue gas inlet valve rear end is connected overgrate air preheater (4), the pipeline exit of overgrate air preheater set up flue gas outlet valve (5) and second temperature pressure measurement component (6), are connected with the deacidification reaction tower of msw incineration system through flue gas forced draught blower (7) at last. The utility model discloses a waste heat of afterbody flue gas is recycled among the waste incineration process waste heat stove, utilizes the waste heat of afterbody flue gas to heat the overgrate air for the boiler, reduces the steam turbine and takes out the vapour, improves the generated energy, avoids heat waste, energy saving, reduces the influence of flue gas to the environment again when increasing the thermal efficiency.

Description

Waste heat furnace tail flue gas waste heat utilization system
Technical Field
The utility model belongs to the technical field of energy-saving equipment, in particular to waste heat stove afterbody flue gas waste heat utilization system.
Background
With the continuous development of society and the continuous improvement of people's living standard, the treatment of municipal solid waste becomes a big problem in the current society, the current main treatment means in China is waste incineration or waste landfill treatment, but the current land and waste amount make the waste landfill scheme difficult to meet the current requirements, so the waste incineration treatment technology needs to be perfected and more widely applied.
Along with the acceleration of the urbanization process, the domestic garbage treatment demand keeps increasing rapidly, the garbage clearing and transporting quantity continuously increases, and the treatment capacity is relatively insufficient. The urbanization rate of China is increased from 42.99% to 58.52% in 2005-2017, and the rapid development of urbanization and the increasing improvement of the living standard of people enable the cleaning amount of domestic garbage in cities and towns of China to continuously and rapidly increase. According to the novel township program of China, the township rate is improved to about 60% by 2020. Along with the continuous advancement of urbanization and the promotion of the improvement of the living standard of people, the generation and the clearing amount of urban domestic garbage are expected to be continuous.
In terms of the harmless treatment of the household garbage, if a county and a town or a rural area with a lower harmless treatment rate is considered, the number of the historical stockpiling amount of the household garbage in the town is more huge. The pressure of the current refuse surrounding city is relieved, the living environment of urban people is improved, the construction investment of harmless treatment facilities is increased, and the requirement is inevitable, so that a wide space is brought for the development of a refuse treatment market.
Flue gas treatment is a big processing problem always among the msw incineration, and tail gas temperature is generally about 190 ℃ in the waste heat stove, and this part tail gas temperature generally all is difficult to utilize, and it is unsatisfactory to high temperature flue gas treatment effect to follow-up deacidification reaction tower, so the waste heat to the tail gas is being considered and is being utilized, improves heat exchange efficiency, more utilization heat.
Disclosure of Invention
To the current situation that has not carried out the utilization to the afterbody flue gas in the msw incineration production technology that above-mentioned exists, the utility model discloses a waste heat that utilizes the afterbody flue gas carries out the waste heat to the boiler overgrate air, effectively reduces the influence of steam turbine steam extraction to the generated energy, provides a waste heat stove afterbody flue gas waste heat utilization system.
The utility model aims at going on through following technical scheme:
the utility model provides a waste heat stove afterbody flue gas waste heat utilization system, this system connect behind waste heat stove export flue, wherein, the system includes flue gas draught fan, overgrate air preheater and flue gas forced draught blower in proper order, the pipeline exit of flue gas draught fan sets up first temperature pressure measurement component to set up flue gas inlet valve, flue gas inlet valve rear end is connected overgrate air preheater, overgrate air preheater's pipeline exit sets up flue gas outlet valve and second temperature pressure measurement component, is connected with the deacidification reaction tower of msw incineration system through the flue gas forced draught blower at last.
Furthermore, all pipelines, a smoke induced draft fan and a smoke blower in the system are subjected to anticorrosion and explosion-proof treatment.
Furthermore, all pipelines in the system are subjected to external heat insulation treatment by wrapping heat insulation cotton.
Further, the flue gas inlet valve and the flue gas outlet valve are both electrically operated valves.
The utility model discloses compare prior art's beneficial effect does:
1. the waste heat furnace tail flue gas waste heat utilization system realizes the waste heat recycling of tail flue gas in a waste heat furnace in the waste incineration process, utilizes the waste heat of the tail flue gas to heat secondary air for a boiler, reduces the steam extraction of a steam turbine, improves the generated energy, avoids heat waste, saves energy, improves the thermal efficiency, and reduces the influence of the flue gas on the environment;
2. in the waste heat furnace tail flue gas waste heat utilization system, all pipelines and motors are subjected to corrosion-resistant and explosion-proof treatment, so that the corrosive influence of the tail flue gas of the waste heat furnace is avoided, and meanwhile, all pipelines are subjected to external heat preservation treatment, so that maintainers are prevented from being injured due to contact;
3. waste heat stove afterbody flue gas waste heat utilization system, reduced the temperature that gets into deacidification reaction tower flue gas, improved reaction efficiency, reduced the influence of flue gas to the environment.
Drawings
FIG. 1 is the structure schematic diagram of the waste heat utilization system of the tail flue gas of the waste heat furnace.
Detailed Description
As shown in fig. 1, this embodiment provides a waste heat stove afterbody flue gas waste heat utilization system, and this system connects after waste heat stove export flue, wherein, the system includes flue gas draught fan 1, overgrate air preheater 4 and flue gas forced draught blower 7 in proper order, the pipeline exit of flue gas draught fan 1 sets up first temperature pressure measuring element 2 to set up flue gas inlet valve 3, the connection of flue gas inlet valve 3 rear end overgrate air preheater 4, overgrate air preheater 4's pipeline exit sets up flue gas outlet valve 5 and second temperature pressure measuring element 6, is connected with the deacidification reaction tower of msw incineration system through flue gas forced draught blower 7 at last.
All pipelines, a smoke induced draft fan and a smoke blower in the system are subjected to anticorrosion and explosion-proof treatment; all pipelines in the system are subjected to external heat insulation treatment by wrapping heat insulation cotton; the smoke inlet valve and the smoke outlet valve are electrically operated valves.
The application process of the waste heat utilization system for the tail flue gas of the waste heat furnace is as follows:
1) a pipeline is added in an outlet flue of the waste heat furnace, and the flue gas is led out by a flue gas induced draft fan 1;
2) a first temperature and pressure element 2 is arranged at the outlet of a flue gas induced draft fan pipeline for measurement, and a flue gas inlet valve 3 is arranged;
3) the flue gas is led out by a flue gas induced draft fan and then is conveyed to a flue gas inlet of a secondary air preheater 4 through a pipeline, and the flue gas pipeline needs to be subjected to corrosion prevention, explosion prevention and heat preservation treatment;
4) the introduced flue gas is subjected to heat exchange in a secondary air preheater 4, and after secondary air is preheated, the flue gas is led out from an outlet of a secondary air preheater;
5) a second temperature and pressure element 6 is arranged at the outlet of the secondary air preheater 4 for measurement;
6) a flue gas outlet valve 5 is arranged on the flue gas pipeline, and a flue gas blower 7 is arranged on the side close to the hearth;
7) the flue gas is sent back to the deacidification reaction tower by the flue gas blower 7, and is mixed with the unused flue gas and then enters the deacidification reaction tower for treatment.
The flue gas temperature and pressure measuring device is arranged on a pipeline, and data signals are transmitted to a Distributed Control System (DCS) for data monitoring; valves in the system are all electric valves, can also be controlled by a DCS, and are opened and closed according to temperature and pressure data; each smoke fan is controlled by frequency conversion, the smoke amount is controlled according to the secondary air consumption and the temperature, specifically, when the heat value of garbage is low, the smoke extraction amount is adjusted, and other heat sources are used for secondary air preheating; the DCS monitors the equipment, and realizes the start-stop operation and the fault alarm of the process. Automatic, local and remote DCS control interlocking; the electric valves are all integrated valves with electric actuating mechanisms, and the electric actuating mechanisms receive 4-20 mA signals.

Claims (5)

1. The utility model provides a waste heat stove afterbody flue gas waste heat utilization system, this system connect after waste heat stove export flue, a serial communication port, the system includes flue gas draught fan (1), overgrate air preheater (4) and flue gas forced draught blower (7) in proper order, the pipeline exit of flue gas draught fan (1) sets up first temperature pressure measurement component (2) to set up flue gas inlet valve (3), flue gas inlet valve rear end is connected overgrate air preheater (4), the pipeline exit of overgrate air preheater set up flue gas outlet valve (5) and second temperature pressure measurement component (6), are connected with the deacidification reaction tower of msw incineration system through flue gas forced draught blower (7) at last.
2. The waste heat furnace tail flue gas waste heat utilization system of claim 1, characterized in that all pipelines in the system are subjected to corrosion and explosion prevention treatment.
3. The waste heat utilization system for the tail flue gas of the waste heat furnace as claimed in claim 1, wherein the flue gas induced draft fan (1) and the flue gas blower (7) are both subjected to corrosion-resistant and explosion-proof treatment.
4. The waste heat furnace tail flue gas waste heat utilization system of claim 1 or 2, characterized in that all pipelines in the system are subjected to external heat preservation treatment by wrapping heat preservation cotton.
5. The waste heat utilization system for the flue gas at the tail part of the waste heat furnace as claimed in claim 1, wherein the flue gas inlet valve (3) and the flue gas outlet valve (5) are both electrically operated valves.
CN201921438823.7U 2019-09-02 2019-09-02 Waste heat furnace tail flue gas waste heat utilization system Active CN211011412U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921438823.7U CN211011412U (en) 2019-09-02 2019-09-02 Waste heat furnace tail flue gas waste heat utilization system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921438823.7U CN211011412U (en) 2019-09-02 2019-09-02 Waste heat furnace tail flue gas waste heat utilization system

Publications (1)

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CN211011412U true CN211011412U (en) 2020-07-14

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CN201921438823.7U Active CN211011412U (en) 2019-09-02 2019-09-02 Waste heat furnace tail flue gas waste heat utilization system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114811619A (en) * 2022-05-04 2022-07-29 江西南方锅炉股份有限公司 Steam boiler system for combusting yellow phosphorus tail gas and control method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114811619A (en) * 2022-05-04 2022-07-29 江西南方锅炉股份有限公司 Steam boiler system for combusting yellow phosphorus tail gas and control method thereof

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