CN205137624U - Boiler waste heat heating system economizer - Google Patents

Boiler waste heat heating system economizer Download PDF

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Publication number
CN205137624U
CN205137624U CN201520914007.4U CN201520914007U CN205137624U CN 205137624 U CN205137624 U CN 205137624U CN 201520914007 U CN201520914007 U CN 201520914007U CN 205137624 U CN205137624 U CN 205137624U
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China
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water
heating
flue gas
heat
heat pump
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CN201520914007.4U
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Chinese (zh)
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毛永清
郝丽娜
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Beijing Huifeng Renhe Science & Technology Co Ltd
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Beijing Huifeng Renhe Science & Technology Co Ltd
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Abstract

The utility model discloses a boiler waste heat heating system economizer, including heat pump, water charging system and flue, the flue passes flue gas water heating device, water charging system divide into non - heating season water charging system and heat supply network water charging system, water charging system connected gradually flue gas water heating device and heat pump heating season, stop valve, a filter screen, a water pump, a check valve and a back stop valve before having set gradually one number between water charging system and the flue gas water heating device, the heat pump is connected with heat supply network water charging system through heat supply network moisturizing pipeline, the heat pump is connected with hot user's pipeline through the pipeline. The utility model discloses a structural design has effectively utilized the high temperature flue gas of afterbody flue in the boiler, has reduced the clean flue -gas temperature of coming out from the desulfurizing tower on the one hand, utilizes the heat of flue gas to make the temperature of heat supply network water rise, and on the other hand has also reduced the steam turbine and has been used for drawing gas of heat supply, increases generated power, reduces the coal consumption.

Description

A kind of boiler afterheat energy saving device for heating system
Technical field
The utility model relates to a kind of energy saver, particularly relates to a kind of boiler afterheat energy saving device for heating system.
Background technology
China's energy consumption structure is based on coal, along with the fast development of China's economy, electricity needs increases year by year, increasing large-scale coal-fired thermal power generation unit comes into operation, current China fired power generating unit accounts for 74% of total installation of generating capacity, makes great efforts to improve the efficiency of Thermal generation unit, rationally effectively utilizes limited coal resources to be fundamental state policies of China.
In thermal power plant, coal dust can produce a large amount of flue gases in boiler furnace combustion, usual flue gas is direct after treatment enters air by flue, the fired power generating unit of domestic early stage operation, the design exhaust gas temperature of bituminous coal fired boiler is generally about 140 DEG C, exhaust gas temperature during some boiler actual motion up to 150 DEG C ~ 170 DEG C.Exhaust gas temperature is now very high, and wasted the heat of flue gas, heat loss due to exhaust gas is generally 5% ~ 12%.Therefore, flue gas loss causes a large amount of losses of energy, is one maximum in thermal power plant's station boiler various heat losses.
Utility model content
In order to solve the weak point existing for above-mentioned technology, the utility model provides a kind of boiler afterheat energy saving device for heating system.
In order to solve above technical problem, the technical solution adopted in the utility model is: a kind of boiler afterheat energy saving device for heating system, comprises heat pump, water charging system and flue, and flue is through flue gas water device; Water charging system is divided into non-heating season water charging system and Make-up Water for Heating System; Non-heating season water charging system connects flue gas water device and heat pump successively; Stop valve after stop valve before being disposed with No. between water charging system and flue gas water device, a filter screen, a water pump, a non-return valve and No. one;
The delivery port of water charging system is connected by the water inlet of pipeline with flue gas water device, and the delivery port of flue gas water device is connected with the water inlet of heat pump by pipeline; The delivery port of heat pump is connected with the water inlet of stop valve after No. with flue gas water device by stop valve, filter screen, water pump, a non-return valve.
Heat pump is connected with Make-up Water for Heating System by heat supply network moisturizing pipeline; Stop valve before being connected with No. two between Make-up Water for Heating System and heat pump in turn, angie type spring safety valve, flow sensor, stop valve and No. two filter screens after No. two; Heat pump is connected with heat user pipeline by pipeline.
Make-up Water for Heating System is parallel with condenser; The bypass line that condenser is in parallel with Make-up Water for Heating System is provided with butterfly valve.
Pipeline between non-heating season water charging system and heat pump is connected with vacuum tank and chemicals dosing plant.
Flue and flue gas water device are fixed together by welding.
Structural design of the present utility model effectively make use of the high-temperature flue gas of back-end ductwork in boiler, reduce on the one hand from desulfurizing tower neat stress temperature out, utilize the heat of flue gas that the water temperature of hot net water is raised, decrease steam turbine drawing gas for heat supply on the other hand, increase generated output, reduce coal consumption, greatly reducing the waste of energy.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the overall structure figure that the utility model non-heating season water charging system connects.
Fig. 2 is the structure chart that the utility model Make-up Water for Heating System is connected with heat pump.
In figure, 1, heat pump; 2, flue gas water device; 3, stop valve before No.; 4, a filter screen;
5, a water pump; 6, a non-return valve; 7, stop valve after No.; 8, non-heating season water charging system; 9, vacuum tank; 10, chemicals dosing plant; 11, desulfurization pollution discharge pond; 12, chimney; 13, flue; 14, gate valve; 15, motor; 16, steam turbine; 17, Make-up Water for Heating System; 18, condenser; 19, flow sensor; 20, angie type spring safety valve; 21, butterfly valve; 22, stop valve before No. two; 23, stop valve after No. two; 24, No. two filter screens; 25, heat user pipeline.
Detailed description of the invention
As shown in Figure 1 and Figure 2, the utility model comprises heat pump 1, water charging system and flue 13, and flue 13 is through flue gas water device 2; Water charging system is divided into non-heating season water charging system 8 and Make-up Water for Heating System 17; Non-heating season water charging system 8 connects flue gas water device 2 and heat pump 1 successively; Stop valve 3 after stop valve 6, filter screen 7, water pump 5, non-return valve 4 and No. one before being disposed with No. one between water charging system 8 and flue gas water device 2;
The delivery port of water charging system 8 is connected by the water inlet of pipeline with flue gas water device 2, cold water to flow through cool water heating after flue gas water device 2 by the flue gas in flue through piping, water after heating is connected by the water inlet of pipeline with heat pump 1 through the delivery port of flue gas water device 2, then inside heat pump 1, carries out heat exchange.At non-heating season, flue gas water device is connected with power plant heat regenerative system, utilizes smoke discharging residual heat to heat the low pressure feed water of heat regenerative system, reduces drawing gas of low-pressure heater, increases generated output, reduces coal consumption.Finally, the waste heat of flue gas is discharged through chimney 12 after being utilized.
Because the water in heat pump 1 also exists certain remaining temperature after heat exchange, if discharge the energy dissipation that also can cause to a certain degree at this point, therefore the delivery port of heat pump 1 is passed through a stop valve 6, filter screen 7, water pump 5, non-return valve 4 to be connected with the water inlet of flue gas water device 2 with stop valve 3 after No., like this through heat pump 1 out after still to have a surplus the time shorten that heats again in flue gas water device of water of temperature, effectively prevent the waste of energy, serve the effect of energy recycling.
At Heating Season, heat pump 1 is connected with Make-up Water for Heating System 17 by heat supply network moisturizing pipeline; Stop valve 23 and No. two filter screens 24 after stop valve 22, angie type spring safety valve 20, No. 19, two, flow sensor before being connected with No. two between Make-up Water for Heating System 17 and heat pump 1 in turn; Heat pump 1 is connected with heat user pipeline 25 by pipeline.Utilize the heat of flue gas that the water temperature in Make-up Water for Heating System 17 is raised, the hot water after heating, for heat supply, reduces heat supply and draws gas, reduce coal consumption.
Make-up Water for Heating System 17 is parallel with condenser 18; The bypass line that condenser 18 is in parallel with Make-up Water for Heating System 17 is provided with butterfly valve 21, and butterfly valve 21 can arrange multiple according to actual needs, the unlatching of condenser 18 or size adjustment on branch road.
Pipeline between non-heating season water charging system 8 and heat pump 1 is connected with vacuum tank 9 and chemicals dosing plant 10, vacuum tank 9 can play the effect of stable hydraulic pressure, and chemicals dosing plant 10 can carry out medicine interpolation to recirculated water, removes or regulates the impurity in circulation.
Flue 13 and flue gas water device 2 are fixed together by welding, and this easy to process, economy and practicality have both, and can reequip at existing boiler flue.
The utility model is arranged in the exhaust pass of desulfurizing tower, boiler exhaust gas from air preheater out after, then enter electrostatic precipitator and carry out dedusting, after blower fan supercharging, neat stress after desulfurization enters flue gas water device 2, the temperature of wet saturated flue gas can be reduced to less than 45 DEG C by 50 DEG C, and the heat of recovery is for heating the backwater of heat supply network, and the neat stress after final cooling enters air from chimney.There will be condensate water after saturated flue gas cooling, form moisture film between condensate water and flue tube wall, effectively can adsorb the cloud such as droplet, dust in flue gas, reach the function of demist.Therefore, the utility model has possessed waste heat recovery, has reclaimed the function of condensate water, dedusting, demist.This component cooling water adopts the demineralized water of sweet-water tank, and demineralized water is brought up to about 30 DEG C by 20 DEG C.Heat exchanger shower water adopts site technique water, and the sewage after spray enters in desulfurization pollution discharge pond 11 via blow-off line.(condensed water that flue gas water device 2 reclaims, have certain acidity, and chloride ion content is less, can introduces desulfurizing tower or cooling tower, reduces Water of Power Plant consumption).The backwater of Make-up Water for Heating System 17 absorbs the heat of the circulation of flue gas water device 2 through heat pump 1, higher leveled flue gas water device can be passed to, low-quality converting heat can be made full use of and become high-quality heat, make full use of waste heat, improve power plant efficiency.
Above-mentioned embodiment is not to restriction of the present utility model; the utility model is also not limited in above-mentioned citing; the change that those skilled in the art make within the scope of the technical solution of the utility model, remodeling, interpolation or replacement, also all belong to protection domain of the present utility model.

Claims (5)

1. a boiler afterheat energy saving device for heating system, comprises heat pump (1), water charging system and flue (13), it is characterized in that: described flue (13) is through flue gas water device (2); Described water charging system is divided into non-heating season water charging system (8) and Make-up Water for Heating System (17); Described non-heating season water charging system (8) connects flue gas water device (2) and heat pump (1) successively; Stop valve (3) after stop valve (6) before being disposed with No. between described water charging system (8) and flue gas water device (2), a filter screen (7), a water pump (5), a non-return valve (4) and No. one;
The delivery port of described water charging system (8) is connected by the water inlet of pipeline with flue gas water device (2), and the delivery port of flue gas water device (2) is connected by the water inlet of pipeline with heat pump (1); The delivery port of described heat pump (1) is connected with the water inlet of flue gas water device (2) with stop valve (3) after No. by stop valve (6), filter screen (7), water pump (5), a non-return valve (4).
2. boiler afterheat energy saving device for heating system according to claim 1, is characterized in that: described heat pump (1) is connected with Make-up Water for Heating System (17) by heat supply network moisturizing pipeline; Stop valve (22) before being connected with No. two in turn between described Make-up Water for Heating System (17) and heat pump (1), angie type spring safety valve (20), flow sensor (19), stop valve (23) and No. two filter screens (24) after No. two; Described heat pump (1) is connected with heat user pipeline (25) by pipeline.
3. boiler afterheat energy saving device for heating system according to claim 2, is characterized in that: described Make-up Water for Heating System (17) is parallel with condenser (18); The bypass line that described condenser (18) is in parallel with Make-up Water for Heating System (17) is provided with butterfly valve (21).
4. boiler afterheat energy saving device for heating system according to claim 1, is characterized in that: the pipeline between described non-heating season water charging system (8) and heat pump (1) is connected with vacuum tank (9) and chemicals dosing plant (10).
5. boiler afterheat energy saving device for heating system according to claim 1, is characterized in that: described flue (13) and flue gas water device (2) are fixed together by welding.
CN201520914007.4U 2015-11-17 2015-11-17 Boiler waste heat heating system economizer Active CN205137624U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520914007.4U CN205137624U (en) 2015-11-17 2015-11-17 Boiler waste heat heating system economizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520914007.4U CN205137624U (en) 2015-11-17 2015-11-17 Boiler waste heat heating system economizer

Publications (1)

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CN205137624U true CN205137624U (en) 2016-04-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107120714A (en) * 2017-05-18 2017-09-01 大连理工大学 A kind of thermal power plant boiler fume afterheat is used for the whole yearization comprehensive utilization energy conserving system of central heating or heating boiler feed water
CN107178814A (en) * 2017-05-18 2017-09-19 大连理工大学 A kind of thermal power plant boiler fume afterheat is used for the energy conserving system of central heating

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107120714A (en) * 2017-05-18 2017-09-01 大连理工大学 A kind of thermal power plant boiler fume afterheat is used for the whole yearization comprehensive utilization energy conserving system of central heating or heating boiler feed water
CN107178814A (en) * 2017-05-18 2017-09-19 大连理工大学 A kind of thermal power plant boiler fume afterheat is used for the energy conserving system of central heating
CN107120714B (en) * 2017-05-18 2019-08-09 大连理工大学 A kind of whole yearization comprehensive utilization energy conserving system

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