CN113483321A - Flue gas temperature control system for superheater of garbage furnace - Google Patents
Flue gas temperature control system for superheater of garbage furnace Download PDFInfo
- Publication number
- CN113483321A CN113483321A CN202110613294.5A CN202110613294A CN113483321A CN 113483321 A CN113483321 A CN 113483321A CN 202110613294 A CN202110613294 A CN 202110613294A CN 113483321 A CN113483321 A CN 113483321A
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- China
- Prior art keywords
- flue gas
- superheater
- recirculation
- boiler
- temperature
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- 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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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 239000003546 flue gas Substances 0.000 title claims abstract description 65
- 239000010813 municipal solid waste Substances 0.000 title description 3
- 239000000779 smoke Substances 0.000 claims abstract description 17
- 239000002699 waste material Substances 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000004056 waste incineration Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/06—Controlling superheat temperature by recirculating flue gases
- F22G5/08—Controlling superheat temperature by recirculating flue gases preventing furnace gas backflow through recirculating fan
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses a waste furnace superheater smoke temperature control system which comprises an incinerator, wherein an evaporator system, a superheater system and an economizer system are sequentially arranged at the rear half section of a boiler flue of the incinerator, the input end of a recirculation pipeline is connected between a tail smoke treatment system and a chimney, and the output end of the recirculation pipeline is connected with recirculation smoke nozzles uniformly distributed on the boiler flue in front of the superheater system; and the recirculation fan is connected in series on the recirculation pipeline and controls the flow of the flue gas in the recirculation pipeline through the control module. The smoke temperature control system can adjust the smoke temperature of the front inlet of the superheater in real time, so that the inlet smoke temperature is controlled in a reasonable range, the high-temperature corrosion of the superheater is reduced, and the service life of the superheater is prolonged; meanwhile, the flue gas temperature at the front opening of the superheater is controllable, so that the boiler shutdown and ash removal period of the boiler can be shortened, and the boiler operation time is prolonged.
Description
Technical Field
The invention belongs to the technical field of waste incineration power generation boilers, and particularly relates to a smoke temperature control system for a waste furnace superheater.
Background
The waste incineration waste heat boiler has the problem of high-temperature corrosion, wherein the high-temperature corrosion of the superheater is the most difficult to control; at present, for delaying over heater high temperature corrosion, one of them mode is exactly to reduce over heater import smoke temperature, and during the real-time operation, msw incineration exhaust-heat boiler rubbish composition is changeable, and the load fluctuation is great, leads to over heater to advance a mouthful smoke temperature and hardly control, and easy overtemperature to aggravate over heater high temperature corrosion.
Disclosure of Invention
The invention aims to solve the problems and provides a waste furnace superheater flue gas temperature control system which is used for controlling the temperature of flue gas at the front inlet of a superheater and has obvious advantages in the aspects of reducing the high-temperature corrosion of the superheater, prolonging the service life of the superheater and the like.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows.
The utility model provides a waste incinerator over heater gas temperature control system, is including burning furnace, boiler flue, evaporimeter system, over heater system, economizer system, afterbody flue gas processing system and chimney, and the boiler flue back half section that burns burning furnace sets gradually evaporimeter system, over heater system, economizer system, its characterized in that: the input end of the recirculation pipeline is connected between the tail flue gas treatment system and the chimney, and the output end of the recirculation pipeline is connected with recirculation flue gas nozzles uniformly distributed on a boiler flue in front of the superheater system; and the recirculation fan is connected in series on the recirculation pipeline and controls the flow of the flue gas in the recirculation pipeline through the control module. The flue gas treated by the tail flue gas treatment system is introduced to the front of the boiler through a recirculation fan and a recirculation pipeline, and is sprayed into a boiler flue through a recirculation flue gas nozzle to be mixed with high-temperature flue gas, so that the temperature of the inlet flue gas of the superheater system is stabilized within a design range; the amount of the smoke extracted by the recirculation fan is calculated by the control module through data of each measuring point of the boiler.
Furthermore, the amount of the circulating flue gas extracted by the recirculation fan is calculated by the control module through monitoring parameters such as the temperature of the hearth, the primary air amount and the secondary air amount during combustion, so that the mixed flue gas is maintained in a reasonable temperature range when reaching the superheater.
Further, the recirculated flue gas nozzle is arranged on the boiler flue before the evaporator system.
The technical principle of the invention is that for the waste incineration waste heat boiler with a superheater system, a flue gas recirculation system is arranged in the flue in front of the superheater system; the flue gas with lower tail temperature enters a front flue of the superheater through a circulating system and is mixed with the high-temperature flue gas; the circulating flue gas amount is calculated by monitoring parameters such as the temperature of a hearth, the primary air amount and the secondary air amount during combustion, so that the mixed flue gas is maintained in a reasonable temperature range when reaching a superheater; the smoke temperature control system can adjust the smoke temperature of the front inlet of the superheater in real time, so that the inlet smoke temperature is controlled in a reasonable range, the high-temperature corrosion of the superheater is reduced, and the service life of the superheater is prolonged; meanwhile, the flue gas temperature at the front opening of the superheater is controllable, so that the boiler shutdown and ash removal period of the boiler can be shortened, and the boiler operation time is prolonged.
The invention has the technical effects that: the smoke temperature control system can adjust the smoke temperature of the front inlet of the superheater in real time, so that the inlet smoke temperature is controlled in a reasonable range, the high-temperature corrosion of the superheater is reduced, and the service life of the superheater is prolonged; meanwhile, the flue gas temperature at the front opening of the superheater is controllable, so that the boiler shutdown and ash removal period of the boiler can be shortened, and the boiler operation time is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a patented system of the present invention.
In the figure, (1) incinerator, (2) boiler flue, (3) evaporator system, (4) superheater system, (5) economizer system, (6) tail flue gas treatment system, (7) chimney, (8) recirculation fan, (9) recirculation pipeline, (10) recirculation flue gas nozzle, (11) control module.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
Example 1: as shown in fig. 1, a waste furnace superheater flue gas temperature control system comprises an incinerator (1), a boiler flue (2), an evaporator system (3), a superheater system (4), an economizer system (5), a tail flue gas treatment system (6) and a chimney (7), wherein the evaporator system (3), the superheater system (4) and the economizer system (5) are sequentially arranged at the rear section of the boiler flue (2) of the incinerator (1), and is characterized in that the input end of a recirculation pipeline (9) is connected between the tail flue gas treatment system (6) and the chimney (7), and the output end of the recirculation pipeline is connected with recirculation flue gas nozzles (10) uniformly arranged on the boiler flue (2) in front of the evaporator system (3); the recirculation pipeline (9) is connected with a recirculation fan (8) in series, and the recirculation fan (8) controls the flow of flue gas in the recirculation pipeline (9) through a control module (11). The flue gas treated by the tail flue gas treatment system (6) is introduced to the front of the furnace through a recirculation fan (8) and a recirculation pipeline (9), and is sprayed into a boiler flue (2) through a recirculation flue gas nozzle (10) to be mixed with high-temperature flue gas, so that the inlet flue gas temperature of the superheater system (4) is stabilized within a design range. The amount of circulating flue gas extracted by the recirculation fan (8) is calculated by monitoring parameters such as the temperature of a hearth, the primary air amount and the secondary air amount during combustion and the like through a control module (11), so that the mixed flue gas is maintained in a reasonable temperature range when reaching the superheater.
Example 2: a waste incinerator flue gas temperature control system comprises an incinerator (1), a boiler flue (2), an evaporator system (3), an overheater system (4), an economizer system (5), a tail flue gas treatment system (6) and a chimney (7), wherein the evaporator system (3), the overheater system (4) and the economizer system (5) are sequentially arranged at the rear section of the boiler flue (2) of the incinerator (1), the input end of a recirculation pipeline (9) is connected between the tail flue gas treatment system (6) and the chimney (7), and the output end of the recirculation pipeline is connected with recirculation flue gas nozzles (10) uniformly distributed on the boiler flue (2) in front of the overheater system (4); the recirculation pipeline (9) is connected with a recirculation fan (8) in series, and the recirculation fan (8) controls the flow of flue gas in the recirculation pipeline (9) through a control module (11). The flue gas treated by the tail flue gas treatment system (6) is introduced to the front of the furnace through a recirculation fan (8) and a recirculation pipeline (9), and is sprayed into a boiler flue (2) through a recirculation flue gas nozzle (10) to be mixed with high-temperature flue gas, so that the inlet flue gas temperature of the superheater system (4) is stabilized within a design range. The amount of circulating flue gas extracted by the recirculation fan (8) is calculated by monitoring parameters such as the temperature of a hearth, the primary air amount and the secondary air amount during combustion and the like through a control module (11), so that the mixed flue gas is maintained in a reasonable temperature range when reaching the superheater.
Without being limited thereto, any changes or substitutions which are not imaginable by the inventive step should be covered by the protection scope of the patent of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (3)
1. The utility model provides a waste incinerator over heater gas temperature control system, is including burning furnace, boiler flue, evaporimeter system, over heater system, economizer system, afterbody flue gas processing system and chimney, and the boiler flue back half section that burns burning furnace sets gradually evaporimeter system, over heater system, economizer system, its characterized in that: the input end of the recirculation pipeline is connected between the tail flue gas treatment system and the chimney, and the output end of the recirculation pipeline is connected with recirculation flue gas nozzles uniformly distributed on a boiler flue in front of the superheater system; a recirculation fan is connected in series on the recirculation pipeline, and the recirculation fan controls the flow of flue gas in the recirculation pipeline through a control module; the flue gas treated by the tail flue gas treatment system is introduced to the front of the boiler through a recirculation fan and a recirculation pipeline, and is sprayed into a boiler flue through a recirculation flue gas nozzle to be mixed with high-temperature flue gas, so that the temperature of the inlet flue gas of the superheater system is stabilized within a design range; the amount of the smoke extracted by the recirculation fan is calculated by the control module through data of each measuring point of the boiler.
2. The waste furnace superheater flue gas temperature control system of claim 1, wherein: the circulating flue gas amount extracted by the recirculation fan is calculated by the control module through monitoring the temperature of the hearth and the parameters of the primary air amount and the secondary air amount during combustion, so that the mixed flue gas is maintained in a reasonable temperature range when reaching the superheater.
3. The waste furnace superheater flue gas temperature control system of claim 1, wherein: the recirculated flue gas nozzle is arranged on the boiler flue before the evaporator system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110613294.5A CN113483321A (en) | 2021-06-02 | 2021-06-02 | Flue gas temperature control system for superheater of garbage furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110613294.5A CN113483321A (en) | 2021-06-02 | 2021-06-02 | Flue gas temperature control system for superheater of garbage furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113483321A true CN113483321A (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110613294.5A Pending CN113483321A (en) | 2021-06-02 | 2021-06-02 | Flue gas temperature control system for superheater of garbage furnace |
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| CN (1) | CN113483321A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016161821A1 (en) * | 2015-04-08 | 2016-10-13 | 东方电气集团东方锅炉股份有限公司 | Circulating fluidized bed oxygen-enriched combustion apparatus and operation method therefor |
| CN208382139U (en) * | 2018-02-07 | 2019-01-15 | 上海华之邦科技股份有限公司 | A kind of flue gas recirculation system of low nitrogen burning |
| CN109611852A (en) * | 2018-12-28 | 2019-04-12 | 上海康恒环境股份有限公司 | A device for adjusting steam temperature of waste incineration boiler reheater through flue gas recirculation |
| CN111486440A (en) * | 2020-05-26 | 2020-08-04 | 西安热工研究院有限公司 | A system and method for adjusting the reheated steam temperature of a W flame boiler by adopting flue gas recirculation |
| CN111981469A (en) * | 2020-08-13 | 2020-11-24 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Flue gas recirculation system for ultra-supercritical secondary reheating boiler |
-
2021
- 2021-06-02 CN CN202110613294.5A patent/CN113483321A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016161821A1 (en) * | 2015-04-08 | 2016-10-13 | 东方电气集团东方锅炉股份有限公司 | Circulating fluidized bed oxygen-enriched combustion apparatus and operation method therefor |
| CN208382139U (en) * | 2018-02-07 | 2019-01-15 | 上海华之邦科技股份有限公司 | A kind of flue gas recirculation system of low nitrogen burning |
| CN109611852A (en) * | 2018-12-28 | 2019-04-12 | 上海康恒环境股份有限公司 | A device for adjusting steam temperature of waste incineration boiler reheater through flue gas recirculation |
| CN111486440A (en) * | 2020-05-26 | 2020-08-04 | 西安热工研究院有限公司 | A system and method for adjusting the reheated steam temperature of a W flame boiler by adopting flue gas recirculation |
| CN111981469A (en) * | 2020-08-13 | 2020-11-24 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Flue gas recirculation system for ultra-supercritical secondary reheating boiler |
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Application publication date: 20211008 |
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