CN202361350U - Low-temperature fume excess heat recycling system used for heat supply networks of power plants - Google Patents

Low-temperature fume excess heat recycling system used for heat supply networks of power plants Download PDF

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Publication number
CN202361350U
CN202361350U CN2011205008092U CN201120500809U CN202361350U CN 202361350 U CN202361350 U CN 202361350U CN 2011205008092 U CN2011205008092 U CN 2011205008092U CN 201120500809 U CN201120500809 U CN 201120500809U CN 202361350 U CN202361350 U CN 202361350U
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China
Prior art keywords
low
communicated
gas
economizer
temperature
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Expired - Fee Related
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CN2011205008092U
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Chinese (zh)
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马文军
赵旭东
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Beijing Longteng Huachuang Environmental Energy & Technology Co Ltd
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Beijing Longteng Huachuang Environmental Energy & Technology Co Ltd
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Abstract

The utility model discloses a low-temperature fume excess heat recycling system used for heat supply networks of power plants, which comprises a dust catcher, low-temperature economizer, a heating plant and a heat exchanger unit. A first fume inlet which is in communication with a boiler flue is arranged on one side of the dust catcher, a second fume inlet of the low-temperature economizer is in communication with a first fume outlet on the other side of the dust catcher through a first flue, an induced draught fan is arranged on a second flue which is in communication with a second fume outlet of the low-temperature economizer, a third water outlet of the heating plant is in communication with a first water inlet of the low-temperature economizer through a first water inlet pipe, a second water inlet of the heat exchanger unit is in communication with a first water outlet of the low-temperature economizer through a first water outlet pipe, and a second water outlet of the heat exchanger unit is in communication with a third water inlet of the heating plant through a second water outlet pipe. The low-temperature fume excess heat recycling system used for heat supply networks of power plants can absorb completely low-temperature fume excess heat, installation space is flexible, fume discharging temperature and coal consumption in generation are reduced greatly, and energy-saving effect is outstanding.

Description

The low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network
Technical field
The utility model relates to low-temperature flue gas reclaimer technical field, particularly relates to a kind of low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network.
Background technology
The high-temperature flue gas that general power plant soot produces is through behind the boiler economizer, and flue-gas temperature is reduced to about 120~160 ℃, and the flue-gas temperature of this part is lower; Just do not utilized, present national power plant is energy-conservation more and more to be paid attention to, and burned coal price rises steadily; Cost of electricity-generating is higher; Therefore be necessary,, exhaust gas temperature be reduced to 90~110 ℃ even lower power plant's low-temperature flue gas heat recovery.Under the prerequisite of assurance device safe and reliable operation, the degree of depth reduces exhaust gas temperature, realizes flue gas waste heat recovery, reaches energy saving purposes.
Existing economizer generally is arranged in before the air preheater in power plant, can only be used for the flue gas waste heat recovery of higher temperature, can't reclaim the waste heat of low-temperature flue gas.
The utility model content
For solving the problems of the technologies described above, the utility model provides a kind of can fully reclaim the low-temperature flue gas waste heat, easy for installation, and the little low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network takes up room.
The low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network of the utility model; Comprise deduster, low-level (stack-gas) economizer, heating plant and heat exchange unit; One side of said deduster is provided with first smoke inlet that is communicated with boiler flue; Second smoke inlet of said low-level (stack-gas) economizer is communicated with first exhanst gas outlet of deduster opposite side through first flue; Second flue that is communicated with second exhanst gas outlet of low-level (stack-gas) economizer is provided with air-introduced machine; The 3rd delivery port of said heating plant is communicated with first water inlet of low-level (stack-gas) economizer through first water inlet pipe, and second water inlet of said heat exchange unit is communicated with first delivery port of low-level (stack-gas) economizer through first outlet pipe, and second delivery port of heat exchange unit is communicated with the 3rd water inlet of heating plant through second outlet pipe.
Further, also comprise desulfurizing tower, second exhanst gas outlet of said low-level (stack-gas) economizer is communicated with the 3rd smoke inlet of said desulfurizing tower through second flue.
Further, said desulfurizing tower is provided with the 3rd exhanst gas outlet that is communicated with the chimney flue.
Further, be provided with spiral helicine water service pipe in the said low-level (stack-gas) economizer, an end of water service pipe is communicated with first water inlet, and the other end of water service pipe is communicated with first delivery port.
Further, be provided with flow control valve and booster pump successively on said first water inlet pipe.
Further, be provided with flow control valve and booster pump successively on said first outlet pipe.
Further, be provided with flow control valve and booster pump successively on said second outlet pipe.
Further, said deduster is a sack cleaner.
Compared with prior art the beneficial effect of the utility model is:
The low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network of the utility model; Can fully absorb the low-temperature flue gas waste heat; Exhaust gas temperature is reduced to 90~110 ℃ even lower; Heat transfer temperature difference is big, installing space flexible, advantages such as independent operating and excision that boiler combustion is not exerted an influence but have, and can reduce exhaust gas temperature and gross coal consumption rate significantly, and energy-saving effect is remarkable; The utility model is imported water at low temperature through heating plant in low-level (stack-gas) economizer, after the flue gas heating in low-level (stack-gas) economizer, the water after heating gets in the heat exchange unit, and the waste heat in the low-temperature flue gas is fully absorbed.
Description of drawings
Fig. 1 is the flow chart of the utility model.
Fig. 2 is the user mode figure of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail.Following examples are used to explain the utility model, but are not used for limiting the scope of the utility model.
As shown in Figure 1; A kind of low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network; Comprise sack cleaner 1, low-level (stack-gas) economizer 2, heating plant 3, heat exchange unit 4 and desulfurizing tower 5; One side of sack cleaner 1 is provided with first smoke inlet 6 that is communicated with boiler flue; Second smoke inlet 7 of low-level (stack-gas) economizer 2 is communicated with first exhanst gas outlet 9 of sack cleaner 1 opposite side through first flue 8, and second exhanst gas outlet 10 of low-level (stack-gas) economizer 2 is communicated with the 3rd smoke inlet 33 of desulfurizing tower 5 through second flue 11, and second flue 11 is provided with air-introduced machine 12; Air-introduced machine 12 is used to control the flue gas flow direction in the boiler; Desulfurizing tower 5 is provided with the 3rd exhanst gas outlet 13 that is communicated with the chimney flue, and the 3rd delivery port 14 of heating plant 3 is communicated with first water inlet 16 of low-level (stack-gas) economizer 2 through first water inlet pipe 15, is provided with flow control valve 17 and booster pump 18 on first water inlet pipe 15 successively; Second water inlet 19 of heat exchange unit 4 is communicated with first delivery port 21 of low-level (stack-gas) economizer 2 through first outlet pipe 20; Be provided with flow control valve 22 and booster pump 23 on first outlet pipe 20 successively, second delivery port 24 of heat exchange unit 4 is communicated with the 3rd water inlet 26 of heating plant 3 through second outlet pipe 25, is provided with flow control valve 27 and booster pump 28 on second outlet pipe 25 successively.
The low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network of the utility model is provided with spiral helicine water service pipe 29 in its low-level (stack-gas) economizer 2, an end of water service pipe 29 is communicated with first water inlet 16, and the other end of water service pipe is communicated with first delivery port 21.
The effect of control valve is through regulating the flow of condensate, to realize the control to the water yield, the variation of assurance boiler load.
The effect of booster pump is the water-flowing amount that assurance needs, the cascade utilization of realization smoke discharging residual heat.
The low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network of the utility model; During use; First smoke inlet 6 of sack cleaner 1 is communicated with boiler 31 through boiler flue 30, the 3rd exhanst gas outlet 13 of desulfurizing tower 5 is passed through chimney flue 34 be communicated with chimney 32; During work; Under the effect of air-introduced machine 12; Flue gas in the boiler 31 gets in the low-level (stack-gas) economizer 2 through boiler flue 30, and heating plant 3 is imported the water at low temperature in the heating plant in the spiral helicine water service pipe 29 in the low-level (stack-gas) economizer 2 under the effect of booster pump 18 simultaneously, after the water at low temperature in the water service pipe 29 absorb the heat of flue gas; Under the effect of booster pump 23, get in the heat exchange unit 4 and carry out heat exchange; In the entering heating plant 3, the flue gas in the low-level (stack-gas) economizer 2 after the cooling gets into desulfurization in the desulfurizing tower 5 through second flue 11 to water after the heat exchange under the effect of booster pump 28, and the flue gas after desulfurizing tower 5 desulfurization gets into chimney through chimney flue 34;, use with this repetitive cycling after chimney 32 is discharged.
The low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network of the utility model; Can fully absorb the low-temperature flue gas waste heat; Exhaust gas temperature is reduced to 90~110 ℃ even lower; Heat transfer temperature difference is big, installing space flexible, advantages such as independent operating and excision that boiler combustion is not exerted an influence but have, and can reduce exhaust gas temperature and gross coal consumption rate significantly, and energy-saving effect is remarkable.
The above only is the preferred implementation of the utility model; Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model know-why, can also make some improvement and modification, these improvement and modification also should be regarded as the protection domain of the utility model.

Claims (8)

1. low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network; It is characterized in that: comprise deduster, low-level (stack-gas) economizer, heating plant and heat exchange unit; One side of said deduster is provided with first smoke inlet that is communicated with boiler flue; Second smoke inlet of said low-level (stack-gas) economizer is communicated with first exhanst gas outlet of deduster opposite side through first flue; Second flue that is communicated with second exhanst gas outlet of low-level (stack-gas) economizer is provided with air-introduced machine; The 3rd delivery port of said heating plant is communicated with first water inlet of low-level (stack-gas) economizer through first water inlet pipe, and second water inlet of said heat exchange unit is communicated with first delivery port of low-level (stack-gas) economizer through first outlet pipe, and second delivery port of heat exchange unit is communicated with the 3rd water inlet of heating plant through second outlet pipe.
2. the low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network as claimed in claim 1 is characterized in that: also comprise desulfurizing tower, second exhanst gas outlet of said low-level (stack-gas) economizer is communicated with the 3rd smoke inlet of said desulfurizing tower through second flue.
3. the low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network as claimed in claim 2 is characterized in that: said desulfurizing tower is provided with the 3rd exhanst gas outlet that is communicated with the chimney flue.
4. the low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network as claimed in claim 3; It is characterized in that: be provided with spiral helicine water service pipe in the said low-level (stack-gas) economizer; One end of said water service pipe is communicated with first water inlet, and the other end of water service pipe is communicated with first delivery port.
5. the low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network as claimed in claim 4 is characterized in that: be provided with flow control valve and booster pump successively on said first water inlet pipe.
6. the low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network as claimed in claim 5 is characterized in that: be provided with flow control valve and booster pump successively on said first outlet pipe.
7. like any described low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network in the claim 6, it is characterized in that: be provided with flow control valve and booster pump successively on said second outlet pipe.
8. like any described low-temperature flue gas residual neat recovering system that is used for power plant's heat supply network among the claim 1-7, it is characterized in that: said deduster is a sack cleaner.
CN2011205008092U 2011-12-06 2011-12-06 Low-temperature fume excess heat recycling system used for heat supply networks of power plants Expired - Fee Related CN202361350U (en)

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Application Number Priority Date Filing Date Title
CN2011205008092U CN202361350U (en) 2011-12-06 2011-12-06 Low-temperature fume excess heat recycling system used for heat supply networks of power plants

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Application Number Priority Date Filing Date Title
CN2011205008092U CN202361350U (en) 2011-12-06 2011-12-06 Low-temperature fume excess heat recycling system used for heat supply networks of power plants

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104732451A (en) * 2015-03-10 2015-06-24 国家电网公司 Low-pressure economizer energy saving assessment method applied to power plant thermal system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104732451A (en) * 2015-03-10 2015-06-24 国家电网公司 Low-pressure economizer energy saving assessment method applied to power plant thermal system
CN104732451B (en) * 2015-03-10 2017-12-12 国家电网公司 Low-pressure coal saver Evaluation on Energy Saving method for power plant therrmodynamic system

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Address after: 100192 D-3-303 room, Dongsheng science and Technology Park, No. 66 Xiao Dong Road, Beijing, Haidian District, Zhongguancun

Patentee after: Beijing Longteng Huachuang Environmental Energy & Technology Co., Ltd.

Address before: 100085, building 7, building 18, Anning Road, Qinghe, Beijing, Haidian District 410

Patentee before: Beijing Longteng Huachuang Environmental Energy & Technology Co., Ltd.

C56 Change in the name or address of the patentee
CP02 Change in the address of a patent holder

Address after: 100192, Haidian District, Beijing, 66 West Wing Road, No. 16, 4, Room 401

Patentee after: Beijing Longteng Huachuang Environmental Energy & Technology Co., Ltd.

Address before: 100192 D-3-303 room, Dongsheng science and Technology Park, No. 66 Xiao Dong Road, Beijing, Haidian District, Zhongguancun

Patentee before: Beijing Longteng Huachuang Environmental Energy & Technology Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120801

Termination date: 20171206