CN203927883U - A kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system - Google Patents
A kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system Download PDFInfo
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- CN203927883U CN203927883U CN201420244176.7U CN201420244176U CN203927883U CN 203927883 U CN203927883 U CN 203927883U CN 201420244176 U CN201420244176 U CN 201420244176U CN 203927883 U CN203927883 U CN 203927883U
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- 239000007789 gas Substances 0.000 title claims abstract description 101
- 239000000779 smoke Substances 0.000 title claims abstract description 14
- 239000002918 waste heat Substances 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 230000015572 biosynthetic process Effects 0.000 claims abstract 2
- 239000012716 precipitator Substances 0.000 claims description 19
- 230000008676 import Effects 0.000 claims description 11
- 239000003245 coal Substances 0.000 claims description 8
- 230000003009 desulfurizing effect Effects 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 14
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 238000009998 heat setting Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 230000036651 mood Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Abstract
The utility model relates to a kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system, has compared with prior art solved the defect that energy-saving efficiency is low, gas energy utilizes rate variance.In the utility model the delivery port of low low-level (stack-gas) economizer (9) successively through starting drain tank (11), start the be linked back water inlet formation pipeline loop of low low-level (stack-gas) economizer (9) of drainage pump group (12) and Secondary Air heater (14), overfire air fan (13) is connected on the air channel entrance of Secondary Air heater (14), and the ducting outlet of Secondary Air heater (14) accesses burner hearth air channel entrance (15) after air preheater (1).The utility model utilizes high-temperature flue gas heat-setting water, and low-temperature flue gas heating cold wind, by changing the energy proportioning indirect of air preheater and obtaining more high-grade condensate water.
Description
Technical field
The utility model relates to 600MW and above fired power generating unit technical field, is a kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system specifically.
Background technology
Boiler exhaust gas heat loss is one of heat loss main in thermal power plant, by adopting smoke discharging residual heat to utilize system to reduce exhaust gas temperature, can significantly improve the economy of power plant, is one of important channel of improving generatine set heat efficiency.At present, domestic had a lot of power plant to adopt low-level (stack-gas) economizer scheme to reduce exhaust gas temperature, improve economy of power plant, but only adopt low-level (stack-gas) economizer scheme can not well realize gas energy maximum using, the particularly air and gas system of 600MW and above fired power generating unit, embody especially energy-saving efficiency low, the problem that economic worth is little.How to develop a kind of energy-saving efficiency bootstrap system high, that can realize the comprehensive utilization of boiler smoke energy maximization and become the technical problem of being badly in need of solution.
Utility model content
The purpose of this utility model is in order to solve the defect that in prior art, energy-saving efficiency is low, gas energy utilizes rate variance, provides a kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system to solve the problems referred to above.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system, comprise air preheater and condensate water import, the flue outlet of air preheater leads to respectively low-level (stack-gas) economizer group A and low-level (stack-gas) economizer group B, condensate water import is introduced into respectively the water inlet of low-level (stack-gas) economizer group A and low-level (stack-gas) economizer group B, the flue outlet of low-level (stack-gas) economizer group A leads to cold precipitator A, the flue outlet of low-level (stack-gas) economizer group B leads to cold precipitator B, cold precipitator A leads to air-introduced machine A, cold precipitator B leads to air-introduced machine B, the flue outlet of air-introduced machine A and air-introduced machine B converges the low low-level (stack-gas) economizer of rear access, the delivery port of low low-level (stack-gas) economizer is successively through starting drain tank, start the be linked back water inlet of low low-level (stack-gas) economizer of drainage pump group and Secondary Air heater and form pipeline loop, overfire air fan is connected on the air channel entrance of Secondary Air heater, the ducting outlet of Secondary Air heater accesses burner hearth air channel entrance after air preheater.
Also comprise primary air fan, described primary air fan accesses the air channel entrance of a wind heater after air preheater, described low-level (stack-gas) economizer group A delivery port and the delivery port of low-level (stack-gas) economizer group B converge the water inlet of rear access wind heater, the delivery port of wind heater connects condensate water outlet, and the ducting outlet of wind heater connects coal pulverizer air channel entrance.
Also comprise desulfurizing tower, the flue outlet access desulfurizing tower of described low low-level (stack-gas) economizer.
Also comprise gate valve A, gate valve B, gate valve C, gate valve D, gate valve A is contained in the flue outlet of air-introduced machine A, and gate valve B is contained in the flue outlet of air-introduced machine B, and gate valve C is contained in the ducting outlet of primary air fan, and gate valve D is contained in the ducting outlet of Secondary Air heater.
beneficial effect
A kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system of the present utility model, compared with prior art utilize high-temperature flue gas heat-setting water, low-temperature flue gas heating cold wind, by changing the energy proportioning indirect of air preheater and obtaining more high-grade condensate water.Start drain tank and start water tank of voltage regulation and the boost in pressure pump of drainage pump group as heat medium water by employing, play the effect of the hydrophobic heat of recovery boiler.Low low-level (stack-gas) economizer, by the effect of heat medium water, has passed to cold Secondary Air by the low-temperature flue gas heat of air-introduced machine outlet, and the heat that Secondary Air absorbs in air preheater is reduced.The heating steam amount that has reduced system higher quality, reaches at utmost energy-conservation object
brief description of the drawings
Fig. 1 is structural representation of the present utility model
Wherein, 1-air preheater, 2-low-level (stack-gas) economizer group A, 3-low-level (stack-gas) economizer group B, 4-cold precipitator A, 5-cold precipitator B, the import of 6-condensate water, 7-air-introduced machine A, 8-air-introduced machine B, the low low-level (stack-gas) economizer of 9-, 10-desulfurizing tower, 11-start drain tank, 12-starts drainage pump group, 13-overfire air fan, 14-Secondary Air heater, 15-burner hearth air channel entrance, 16-primary air fan, wind heater of 17-, the outlet of 18-condensate water, 19-coal pulverizer air channel entrance, 20-gate valve A, 21-gate valve B, 22-gate valve C, 23-gate valve D.
Detailed description of the invention
For making that architectural feature of the present utility model and effect of reaching are had a better understanding and awareness, coordinate detailed explanation in order to preferred embodiment and accompanying drawing, be described as follows:
As shown in Figure 1, a kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system of the present invention, comprises air preheater 1 and condensate water import 6, and air preheater 1 and condensate water import 6 are the equipment using in prior art.The flue outlet of air preheater 1 leads to respectively low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3, economizer and the SCR etc. of the top equipment of air preheater 1 for connecting in prior art, the chimney intake of low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3 is connected with the flue outlet of air preheater 1, low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3 are the combination of two low-level (stack-gas) economizers, thereby coordinate 600MW and above fired power generating unit air and gas system.Condensate water import 6 is introduced into respectively the water inlet of low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3, to coordinate low-level (stack-gas) economizer group to carry out heat exchange.The flue outlet of low-level (stack-gas) economizer group A2 leads to cold precipitator A4, the flue outlet of low-level (stack-gas) economizer group B3 leads to cold precipitator B5, flue outlet at air preheater 1 arranges low-level (stack-gas) economizer to cold precipitator gas approach, carry out heat exchange to realize flue gas and condensate water, air preheater 1 is exported more than cigarette temperature is reduced to acid dew-point temperature.Cold precipitator A4 leads to air-introduced machine A7, and cold precipitator B5 leads to air-introduced machine B8, and the flue outlet of air-introduced machine A7 and air-introduced machine B8 converges the low low-level (stack-gas) economizer 9 of rear access.Air-introduced machine A7 and air-introduced machine B8 cause low low-level (stack-gas) economizer 9 through cold precipitator A4 and cold precipitator B5 respectively by flue gas, more than for the low-level (stack-gas) economizer scheme of only utilizing of using in prior art reduces exhaust gas temperature.
The delivery port of low low-level (stack-gas) economizer 9 successively through starting drain tank 11, start the be linked back water inlet of low low-level (stack-gas) economizer 9 of drainage pump group 12 and Secondary Air heater 14 and form pipeline loop, heat medium water at low low-level (stack-gas) economizer 9, start drain tank 11, start circulation between drainage pump group 12 and Secondary Air heater 14.Overfire air fan 13 is connected on the air channel entrance of Secondary Air heater 14, and low low-level (stack-gas) economizer 9, using water as heating agent, will be heated cold Secondary Air by the water of flue gas, using water as the cold Secondary Air of middle heating medium for heating.For cost-saving, also adopt existing startup drain tank 11 and start water tank of voltage regulation and the boost in pressure pump of drainage pump group 12 as heat medium water simultaneously, also playing the effect of the hydrophobic heat of recovery boiler.The ducting outlet of Secondary Air heater 14 accesses burner hearth air channel entrance 15 after air preheater 1, and air channel and flue are two independently pipelines, enters air preheater 1 and again heat after cold Secondary Air is heated, and access burner hearth air channel entrance 15 is sent into burner hearth.
In order to promote greatly energy-saving effect, also comprise primary air fan 16, primary air fan 16 accesses the air channel entrance of a wind heater 17 after air preheater 1, and primary air fan 16 tentatively heats up a wind by air preheater 1.The delivery port of low-level (stack-gas) economizer group A2 delivery port and low-level (stack-gas) economizer group B3 converges the water inlet of a wind heater 17 of rear access, low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3 water out flow to once in wind heater 17, with the pending cooling for a wind.The delivery port of wind heater 17 connects condensate water outlet 18, for connecing condensate water direction.The ducting outlet of a wind heater 17 connects coal pulverizer air channel entrance 19, for connecing coal pulverizer direction.Primary air fan 16 carries out flue gas-air heat exchange by a wind by air preheater 1, generates a hot blast of high temperature.And then utilize low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3 condensate water out that a hot blast heat exchange of high temperature cooling is adjusted to the required temperature of pulverized coal preparation system drier, thereby connect coal pulverizer direction.Condensate water, through changing after temperature rise temperature, obtains more high-grade condensate water simultaneously.Can also comprise desulfurizing tower 10, the flue outlet access desulfurizing tower 10 of low low-level (stack-gas) economizer 9, now the hot blast of the flue outlet of low low-level (stack-gas) economizer 9 is lowered the temperature, and directly sends into desulfurizing tower 10 and uses.
In order to maintain easily, can also comprise gate valve A20, gate valve B21, gate valve C22, gate valve D23, gate valve A20 is contained in the flue outlet of air-introduced machine A7, gate valve B21 is contained in the flue outlet of air-introduced machine B8, gate valve C22 is contained in the ducting outlet of primary air fan 16, and gate valve D23 is contained in the ducting outlet of Secondary Air heater 14.Gate valve A20 and gate valve B21 control respectively the output of air-introduced machine A7 and air-introduced machine B8, and gate valve C22 and gate valve D23 control respectively the output of primary air fan 16 and Secondary Air heater 14.
In the time that reality is used, the utility model, based on flue gas-air heat exchange principle, reaches the utilization of level Four gradient residual heat integrative, below the temperature mentioned can be slightly unsteady up and down according to the actual conditions of equipment, for better explanation operation principle of the present utility model is introduced.
The first order: air preheater 1 exports flue gas and reaches 127 degree, enters low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3; The water temperature of condensate water import 6 is 82 degree, enters equally low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3.Flue gas and condensate water are carried out heat exchange at low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3, more than flue-gas temperature is dropped to acid dew point, are about 93 degree, and condensing water temperature is promoted to 102 degree.
The second level: low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3 converge out 99 flue gases of spending through cold precipitator A4, cold precipitator B5, air-introduced machine A7 and air-introduced machine B8 respectively and enter low low-level (stack-gas) economizer 9.Low low-level (stack-gas) economizer 9, startup drain tank 11, startup drainage pump group 12 and Secondary Air heater 14 form water channel loop, the water inlet temperature of low low-level (stack-gas) economizer 9 is 70 degree, the flue gas cool-down that low low-level (stack-gas) economizer 9 flue entrances 99 are spent becomes the flue gas of 75 degree, uses for sulphur tower 10.
The third level: the delivery port temperature of low low-level (stack-gas) economizer 9 is 87 degree, under startup drain tank 11,12 effects of startup drainage pump group, enter Secondary Air heater 14 and carry out heat exchange cooling, the delivery port of Secondary Air heater 14 is cooled to 70 degree, and the water inlet that is circulated to low low-level (stack-gas) economizer 9 is also 70 degree.After the flue gas that the water temperature of 70 degree is spent through too low low-level (stack-gas) economizer 9 flue entrances 99, be again promoted to the water temperature of 87 degree, carry out heat exchange again for Secondary Air heater 14.Meanwhile, the Secondary Air that overfire air fan sucks only has 25 degree, after the water inlet 87 of Secondary Air heater 14 is spent water temperature exchange, Secondary Air is upgraded to 68 degree, thereby improve air preheater 1 import Secondary Air temperature, then after air preheater 1 slightly heats up, sent into burner hearth and use.
The fourth stage: the water temperature that condensate water import 6 enters low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3 is 82 degree, is promoted to 102 degree from low-level (stack-gas) economizer group A2 and low-level (stack-gas) economizer group B3 water temperature out, and accesses a wind heater 17 to carry out heat exchange.Primary air fan initial temperature is 25 degree, is upgraded to 300 degree after air preheater 1, and the air channel entrance of a wind heater 17 of access and the condensate water of 102 degree are carried out heat exchange.Condensate water heats up, general mood cooling, and the general mood that the ducting outlet of a wind heater 17 is reduced to 180 degree is for coal pulverizer, and the condensate water that the delivery port of a wind heater 17 is upgraded to 140 degree is continuous for other works.
More than show and described general principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what in above-described embodiment and description, describe is principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall in claimed scope of the present utility model.The protection domain that the utility model requires is defined by appending claims and equivalent thereof.
Claims (4)
1. the smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system, comprise air preheater (1) and condensate water import (6), the flue outlet of air preheater (1) leads to respectively low-level (stack-gas) economizer group A(2) and low-level (stack-gas) economizer group B(3), condensate water import (6) is introduced into respectively low-level (stack-gas) economizer group A(2) and low-level (stack-gas) economizer group B(3) water inlet, low-level (stack-gas) economizer group A(2) flue outlet lead to cold precipitator A(4), low-level (stack-gas) economizer group B(3) flue outlet lead to cold precipitator B(5), cold precipitator A(4) lead to air-introduced machine A(7), cold precipitator B(5) lead to air-introduced machine B(8), air-introduced machine A(7) and air-introduced machine B(8) flue outlet converge the low low-level (stack-gas) economizer of rear access (9), it is characterized in that: the delivery port of low low-level (stack-gas) economizer (9) is successively through starting drain tank (11), start the be linked back water inlet formation pipeline loop of low low-level (stack-gas) economizer (9) of drainage pump group (12) and Secondary Air heater (14), overfire air fan (13) is connected on the air channel entrance of Secondary Air heater (14), the ducting outlet of Secondary Air heater (14) accesses burner hearth air channel entrance (15) after air preheater (1).
2. a kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system according to claim 1, it is characterized in that: also comprise primary air fan (16), described primary air fan (16) accesses the air channel entrance of a wind heater (17) after air preheater (1), described low-level (stack-gas) economizer group A(2) delivery port and low-level (stack-gas) economizer group B(3) delivery port converge the water inlet of rear access wind heater (17), the delivery port of wind heater (17) connects condensate water outlet (18), the ducting outlet of wind heater (17) connects coal pulverizer air channel entrance (19).
3. a kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system according to claim 2, is characterized in that: also comprise desulfurizing tower (10), the flue outlet access desulfurizing tower (10) of described low low-level (stack-gas) economizer (9).
4. a kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system according to claim 3, it is characterized in that: also comprise gate valve A(20), gate valve B(21), gate valve C(22), gate valve D(23), gate valve A(20) be contained in air-introduced machine A(7) flue outlet, gate valve B(21) be contained in air-introduced machine B(8) flue outlet, gate valve C(22) be contained in the ducting outlet of primary air fan (16), gate valve D(23) be contained in the ducting outlet of Secondary Air heater (14).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420244176.7U CN203927883U (en) | 2014-05-14 | 2014-05-14 | A kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420244176.7U CN203927883U (en) | 2014-05-14 | 2014-05-14 | A kind of smoke waste heat utilization system for 600MW and above fired power generating unit air and gas system |
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| CN203927883U true CN203927883U (en) | 2014-11-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896503A (en) * | 2015-06-19 | 2015-09-09 | 东方电气集团东方锅炉股份有限公司 | Boiler smoke waste heat use system |
| CN105757645A (en) * | 2016-03-18 | 2016-07-13 | 中国科学院广州能源研究所 | Efficient low-grade residual heat resource utilization system for coal-fired power plant |
| CN107023818A (en) * | 2017-05-22 | 2017-08-08 | 山西中源科扬节能服务有限公司 | Improved cooling coal economizer for power stations |
| CN108224465A (en) * | 2018-01-23 | 2018-06-29 | 中国能源建设集团西北电力试验研究院有限公司 | It is a kind of by the use of activation system draining as the device and method of steam air heater heating source |
-
2014
- 2014-05-14 CN CN201420244176.7U patent/CN203927883U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896503A (en) * | 2015-06-19 | 2015-09-09 | 东方电气集团东方锅炉股份有限公司 | Boiler smoke waste heat use system |
| CN105757645A (en) * | 2016-03-18 | 2016-07-13 | 中国科学院广州能源研究所 | Efficient low-grade residual heat resource utilization system for coal-fired power plant |
| CN105757645B (en) * | 2016-03-18 | 2018-01-16 | 中国科学院广州能源研究所 | A kind of coal-burning power plant's low grade residual heat resources effective utilization system |
| CN107023818A (en) * | 2017-05-22 | 2017-08-08 | 山西中源科扬节能服务有限公司 | Improved cooling coal economizer for power stations |
| CN108224465A (en) * | 2018-01-23 | 2018-06-29 | 中国能源建设集团西北电力试验研究院有限公司 | It is a kind of by the use of activation system draining as the device and method of steam air heater heating source |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA ENERGY ENGINEERING GROUP ANHUI ELECTRIC POWE Free format text: FORMER NAME: CHINA ENERGY CONSTRUCTION GROUP ANHUI ELECTRIC POWER DESIGN INSTITUTE |
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| CP01 | Change in the name or title of a patent holder |
Address after: 230601 Hefei City, Anhui province Avenue, No. 369 Patentee after: Co., Ltd of China Energy Construction Group Anhui Electric Power Design Institute Address before: 230601 Hefei City, Anhui province Avenue, No. 369 Patentee before: Anhui Electric Power Design Institute, CEEC |