CN204026714U - A kind of device of fume afterheat comprehensive utilization - Google Patents
A kind of device of fume afterheat comprehensive utilization Download PDFInfo
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- CN204026714U CN204026714U CN201420283255.9U CN201420283255U CN204026714U CN 204026714 U CN204026714 U CN 204026714U CN 201420283255 U CN201420283255 U CN 201420283255U CN 204026714 U CN204026714 U CN 204026714U
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- Y—GENERAL 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model relates to the device of a kind of fume afterheat comprehensive utilization.This device comprises gas cooler, flue gas heater and closed cycle pump; Wherein, gas cooler is arranged on the flue of boiler air preheater exhanst gas outlet, and flue gas heater is arranged on the flue of desulfurizing tower exhanst gas outlet; The delivery port of gas cooler is connected by the first pipeline with the water inlet of flue gas heater, and the delivery port of flue gas heater is connected by second pipe with the water inlet of gas cooler, forms closed cycle water main road; Closed cycle pump is arranged on described closed cycle water main road.The utility model mainly utilizes the waste heat of the boiler exhaust gas of thermal power generation unit as thermal source to heat the neat stress of wet desulfuration tower exhanst gas outlet, its use operates steadily, safety, environmental protection, there is good effects of energy conservation and environmental protection.
Description
Technical field
The utility model belongs to electric power energy-saving, field of Environment Protection, particularly relates to the device of a kind of fume afterheat comprehensive utilization.
Background technology
Along with society is to the pay attention to day by day of environmental protection, in order to protect air quality, thermal power plant substantially all have employed flue gas desulfurization technique.Wherein Wet Limestone Desulfurization is because possessing the advantages such as technology maturation, efficiency is high, reliable, is obtained extensive utilization.At present, wet desulfurization system be substantially all adopt " wet flue gas discharge " scheme, by flow through the neat stress after desulfuration absorbing tower directly by chimney to airborne release.Because the neat stress of discharging from desulfuration absorbing tower is saturated wet flue gas, through downstream flue and chimney, condensation can be met and bear water and dissolve multiple acidic materials, cold end corrosion is caused to downstream flue and chimney.In addition, at the wet flue gas of chimney breast, due to temperature decrease during discharge chimney, a large amount of drop can be condensed out rapidly near chimney breast, and sedimentation around chimney, due in this drop containing the product gypsum of wet desulphurization, therefore this sedimentation is commonly called as " gypsum rain ", and this wet flue gas can cause the pollution of surrounding environment by " gypsum rain " that chimney directly discharges generation.
At present, on the one hand, the exhaust gas temperature of the boiler air preheater of thermal power plant, generally at 120 DEG C to 150 DEG C, still has certain waste heat recovery and is worth.On the other hand, electric cleaner is modal smoke dust-removing equipment in thermal power plant.Be subject to the restriction of electric cleaner working mechanism, electric cleaner is difficult to the dust in flue gas all to remove totally.A large amount of research and practices shows, enter the flue-gas temperature of electric cleaner lower time, the efficiency of dust collection of electric cleaner can be improved, reduce the concentration of emission of flying dust, dust.
Therefore; if can reclaim the smoke discharging residual heat of boiler air preheater; and utilize the smoke discharging residual heat of boiler air preheater to improve the temperature of the neat stress after desulfurizing tower; neat stress is made to enter superheat state; effectively will eliminate neat stress to the cold end corrosion of downstream flue and chimney and " gypsum rain " phenomenon; proterctive equipment and surrounding environment, and economize energy.And if reduce the temperature of flue gas before electric cleaner, the efficiency of dust collection of electric cleaner can also be improved.In addition, if be used for by unnecessary heat heating unit condensate water (or other medium), then economic benefit can also be obtained.
Summary of the invention
In view of this; the purpose of this utility model is; the device that a kind of new fume afterheat fully utilizes is provided; technical problem to be solved makes it utilize the smoke discharging residual heat of boiler air preheater to improve the temperature of neat stress after desulfurization; eliminate neat stress to the cold end corrosion of downstream flue and chimney and " gypsum rain " phenomenon; proterctive equipment and surrounding environment, reduce anticorrosion investment, reaches the object of energy-saving and environmental protection.
Another object of the present utility model is, the device that a kind of new fume afterheat fully utilizes is provided, technical problem to be solved makes its flue-gas temperature passing through to reduce electric cleaner entrance, improve the efficiency of dust collection of electric cleaner, reduce fly ash emission amount, reduce the evaporation capacity of desulfurizing tower, reach the object of energy-saving and environmental protection.
An object more of the present utility model is, the device that a kind of new fume afterheat fully utilizes is provided, technical problem to be solved makes it utilize the smoke discharging residual heat of boiler air preheater to carry out heat-setting water (or other medium), energy-saving and environmental protection, and produce economic benefit.
The purpose of this utility model and solve its technical problem and realize by the following technical solutions.According to the device of a kind of fume afterheat comprehensive utilization that the utility model proposes, it comprises: gas cooler, flue gas heater and closed cycle pump; Wherein, described gas cooler is arranged on the flue of boiler air preheater exhanst gas outlet, and described flue gas heater is arranged on the flue of desulfurizing tower exhanst gas outlet; The delivery port of described gas cooler is connected by the first pipeline with the water inlet of described flue gas heater, and the delivery port of described flue gas heater is connected by second pipe with the water inlet of described gas cooler, forms closed cycle water main road; Described closed cycle pump is arranged on described closed cycle water main road.
The purpose of this utility model and solve its technical problem and also can be applied to the following technical measures to achieve further.
The device of aforesaid fume afterheat comprehensive utilization, also comprises: condensate water heat exchanger, closed cycle water main road flow control valve, condensate water heat exchanger bypass flow control valve, condensate water recuperator bypass valve, condensate water heat exchanger closed cycle water water intaking valve, condensate water heat exchanger closed cycle water back-water valve (BWV), condensate water water intaking valve and coagulation hydroenergy backwater valve; Wherein, described first pipeline is provided with the first delivery port, described second pipe is provided with the first water return outlet; The closed cycle water water inlet of described condensate water heat exchanger is connected with described first delivery port by the 3rd pipeline, and the closed cycle water delivery port of described condensate water heat exchanger is connected with described first water return outlet by the 4th pipeline, forms condensate water heat exchanger branch road; Described closed cycle water main road flow control valve is arranged on described closed cycle water main road, and between described first delivery port and described flue gas heater or between described first water return outlet and described flue gas heater; Described 3rd pipeline is also directly connected by the 5th pipeline with described 4th pipeline, and form condensate water recuperator bypass, described condensate water recuperator bypass valve is arranged on described condensate water recuperator bypass; Described condensate water heat exchanger closed cycle water water intaking valve is arranged on described 3rd pipeline, and between described condensate water recuperator bypass and described condensate water heat exchanger; Described condensate water heat exchanger closed cycle water back-water valve (BWV) is arranged on described 4th pipeline, and between described condensate water recuperator bypass and described condensate water heat exchanger; Described condensate water heat exchanger bypass flow control valve is arranged on described condensate water heat exchanger branch road, and between described first delivery port and described condensate water recuperator bypass or between described first water return outlet and described condensate water recuperator bypass; The condensate water water inlet of described condensate water heat exchanger and condensate water delivery port are connected with condensing water conduit respectively by the 6th pipeline and the 7th pipeline, described condensate water water intaking valve is arranged on described 6th pipeline, and described coagulation hydroenergy backwater valve is arranged on described 7th pipeline.
The device of aforesaid fume afterheat comprehensive utilization, also comprises: auxiliary steam heater, auxiliary steam heater by-pass valve, auxiliary steam heater closed-up water water intaking valve, auxiliary steam heater closed-up water back-water valve (BWV), auxiliary steam drain tank, auxiliary steam flow control valve and Automatic steam trap Trap; Wherein, described first pipeline is provided with the second delivery port and the second water return outlet successively; The closed cycle water water inlet of described auxiliary steam heater is connected with described second delivery port by the 8th pipeline, the closed cycle water delivery port of described auxiliary steam heater is connected with described second water return outlet by the 9th pipeline, forms auxiliary steam heater branch road; Described auxiliary steam heater by-pass valve is arranged on described first pipeline, and between described second delivery port and described second water return outlet; Described auxiliary steam heater closed-up water water intaking valve is arranged on described 8th pipeline, and described auxiliary steam heater closed-up water back-water valve (BWV) is arranged on described 9th pipeline; The auxiliary steam entrance of described auxiliary steam heater is connected with auxiliary steam pipeline; The condensation-water drain of described auxiliary steam heater is connected with the water inlet of described auxiliary steam drain tank, and the delivery port of described auxiliary steam drain tank is connected with steam drainage recovery channel; Described auxiliary steam flow control valve is arranged on described auxiliary steam pipeline, and described Automatic steam trap Trap is arranged on described steam drainage recovery channel.
The device of aforesaid fume afterheat comprehensive utilization, also comprises: water supply tank and water compensating valve; Described second pipe is provided with water inlet, and the delivery port of described water supply tank is connected with described water inlet by the tenth pipeline, forms moisturizing branch road; Described water compensating valve is arranged on described moisturizing branch road.
The device of aforesaid fume afterheat comprehensive utilization, wherein said gas cooler is arranged between described boiler air preheater exhanst gas outlet and electric cleaner.
The device of aforesaid fume afterheat comprehensive utilization, wherein said gas cooler is arranged between electric cleaner and described desulfurizing tower.
The device of aforesaid fume afterheat comprehensive utilization, the heating surface of wherein said gas cooler and described flue gas heater adopts finned tube or the light pipe of spiral fin coil, H type extended surface tube, other form.
The utility model compared with prior art has obvious advantage and beneficial effect.By technique scheme, the device of a kind of fume afterheat comprehensive utilization of the utility model at least has following advantages and beneficial effect:
One, the utility model is by reclaiming the smoke discharging residual heat of boiler air preheater; and be used for the waste heat of recovery improving the temperature of neat stress after desulfurization; neat stress is made to enter superheat state; avoid the cold end corrosion of wet flue gas to downstream flue and chimney; protect electric power factory equipment, significantly reduce the anticorrosion investment of downstream flue and chimney.
Two, the utility model is by reclaiming the smoke discharging residual heat of boiler air preheater; and be used for the waste heat of recovery improving the temperature of neat stress after desulfurization; improve the rising height of chimney to flue gas; eliminate the phenomenon that chimney breast emits " white cigarette " (water vapour); avoid the sedimentation of " gypsum rain " around chimney, protect the environment around power plant.
Three, the utility model is by reducing the flue-gas temperature of electric cleaner entrance, improves the efficiency of dust collection of electric cleaner, decreases the discharge capacity of flying dust, protect environment.
Four, the utility model is by reducing the flue-gas temperature of electric cleaner entrance, improves the efficiency of dust collection of electric cleaner, reduces the evaporation capacity of desulfurizing tower, saved water for industrial use.
Five, the utility model is by being used for heat-setting water (or other medium) by the smoke discharging residual heat of partially recycled boiler air preheater, can produce certain economic benefit.
Six, the utility model structure is simple, operates steadily, safe and reliable.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to technological means of the present utility model can be better understood, and can be implemented according to the content of description, and can become apparent to allow above and other object of the present utility model, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a preferred embodiment of the device of a kind of fume afterheat comprehensive utilization of the utility model.
1: gas cooler 2: flue gas heater
3: condensate water heat exchanger 4: auxiliary steam heater
5: closed cycle pump 6: closed cycle water main road flow control valve
7: condensate water heat exchanger bypass flow control valve 8: water supply tank;
9: auxiliary steam drain tank 10: condensate water recuperator bypass valve
11: condensate water heat exchanger closed-up water water intaking valve 12: condensate water heat exchanger closed-up water back-water valve (BWV)
13: condensate water water intaking valve 14: coagulation hydroenergy backwater valve
15: auxiliary steam heater by-pass valve 16: auxiliary steam heater closed-up water water intaking valve
17: auxiliary steam heater closed-up water back-water valve (BWV) 18: auxiliary steam flow control valve
19: Automatic steam trap Trap 20: water compensating valve
A, b, c, d, e, f, g, h, i, j: pipeline k: condensing water conduit
L: auxiliary steam pipeline m: steam drainage recovery channel
A: the first water outlet B: the first water return outlet
C: the second delivery port D: the second water return outlet
E: water inlet
Detailed description of the invention
For further setting forth the utility model for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to its detailed description of the invention of device, structure, method, step, feature and effect thereof of fully utilizing according to a kind of fume afterheat that the utility model proposes, be described in detail as follows.
Referring to shown in Fig. 1, is the schematic diagram of a preferred embodiment of the device of a kind of fume afterheat comprehensive utilization of the utility model.The device of a kind of fume afterheat comprehensive utilization of the utility model forms primarily of gas cooler 1, flue gas heater 2 and closed cycle pump 5.Wherein, gas cooler 1 is arranged on the flue of boiler air preheater exhanst gas outlet, and flue gas heater 2 is arranged on the flue of desulfurizing tower exhanst gas outlet.The delivery port of gas cooler 1 is connected by pipeline a with the water inlet of flue gas heater 2, and the delivery port of flue gas heater 2 is connected by pipeline b with the water inlet of gas cooler 1, forms closed cycle water main road.Closed cycle pump 5 is arranged on closed cycle water main road.As shown in Figure 1, in the present embodiment, closed cycle pump 5 is arranged on pipeline a.
The utility model by arranging gas cooler 1 on the flue of boiler air preheater exhanst gas outlet, flue between desulfurizing tower exhanst gas outlet to chimney is arranged flue gas heater 2, and be connected to form water side closed cycle by water lateral line and gas cooler 1 and flue gas heater 2, realize the recovery to the smoke discharging residual heat of boiler air preheater, and utilize the smoke discharging residual heat of boiler air preheater to add the neat stress after thermally desulfurizing.Wherein, cooling medium in gas cooler 1 is closed cycle water, gas cooler 1 utilizes closed cycle water to absorb the waste heat of the flue gas of discharging from boiler air preheater exhanst gas outlet, reduce the temperature of flue gas, and heat closed cycle water, closed cycle water is made to be heated to be hot water in gas cooler 1, hot water enters flue gas heater 2 by water lateral line under the promotion of closed cycle pump 5, the neat stress that the hot water heating entering flue gas heater 2 is discharged from the exhanst gas outlet of desulfurizing tower, and cold water is cooled in flue gas heater 2, cold water is again admitted to gas cooler 1 by water lateral line again under the promotion of closed cycle pump 5, recycle.
The utility model can make the temperature of saturated wet flue gas of discharging from desulfurizing tower exhanst gas outlet rise to about 80 DEG C from 50 DEG C, enters superheat state, avoids wet flue gas to the cold end corrosion of downstream flue and chimney, significantly reduces the anticorrosion investment of chimney; Improve chimney to the rising height of flue gas simultaneously, improve the phenomenon that chimney emits white steam, eliminate the phenomenon of " gypsum rain " sedimentation around chimney in certain limit, reduce pollutant flooring concentration, protect environment.
In an embodiment of the present utility model, gas cooler 1 of the present utility model is arranged between boiler air preheater exhanst gas outlet and electric cleaner.Made the temperature of the flue gas entering electric cleaner reduce by gas cooler 1, volume contraction, volume flow reduces, and the flow velocity of flue gas in electric precipitation is reduced, thus improves the efficiency of dust collection of electric cleaner, reduce fly ash emission.In addition, due to most flying dust, at this temperature section, along with temperature reduces, fly ash resistivity also decreases, and flying dust is more easily caught by electric cleaner, and therefore the efficiency of dust collection of electric cleaner can be further improved.Meanwhile, because flue-gas temperature reduces, the evaporation capacity in desulfurizing tower can also be reduced, save water for industrial use.
In another embodiment of the present utility model, gas cooler 1 of the present utility model is arranged between electric cleaner and desulfurizing tower cigarette.Now, the setting of gas cooler 1 still can reduce the temperature of the flue gas entering desulfurizing tower, reduces the evaporation capacity in desulfurizing tower, saves water for industrial use, but does not improve the efficiency of dust collection of electric cleaner.
The exhaust gas temperature of a lot of thermal power generation unit is higher (>=140 DEG C), such as when unit is in summer condition or high load capacity operating mode, now the heat of closed cycle Water Sproading is more, such as flue-gas temperature can be reduced to about 90 DEG C by closed cycle water, to improve efficiency of dust collection, hot water by splitter section closed cycle water heats the condensate water of turbine system, obtain economic benefit, the hot water of the part closed cycle water of shunting also may be used for heating other medium, such as: heat supply network water, domestic hot-water, power plant's moisturizing etc., different economic benefits can be obtained, realize comprehensive utilization that is energy-conservation and environmental protection.
Therefore, in an embodiment of the present utility model, the water lateral line of the device fully utilized at fume afterheat of the present utility model can be provided with a condensate water heat exchanger branch road.As shown in Figure 1, pipeline a of the present utility model is provided with the first water outlet A, pipeline b is provided with the first water return outlet B.The closed cycle water water inlet of condensate water heat exchanger 3 is connected with the first water outlet A by pipeline c, and the closed cycle water delivery port of condensate water heat exchanger 3 is connected with the first water return outlet B by pipeline d, forms condensate water heat exchanger branch road.Meanwhile, on closed cycle water main road, between the first water outlet A and flue gas heater 2 or between the first water return outlet B and flue gas heater 2, be provided with closed cycle water main road flow control valve 6.As shown in Figure 1, in the present embodiment, closed cycle water main road flow control valve 6 is between the first water outlet A and flue gas heater 2.
Wherein, the pipeline c forming condensate water heat exchanger branch road is also directly connected by pipeline e with pipeline d, forms condensate water recuperator bypass.Condensate water recuperator bypass is provided with condensate water recuperator bypass valve 10.On pipeline c, between condensate water recuperator bypass and condensate water heat exchanger 3, be also provided with condensate water heat exchanger closed cycle water water intaking valve 11.On pipeline d, between condensate water recuperator bypass and condensate water heat exchanger 3, be also provided with condensate water heat exchanger closed cycle water back-water valve (BWV) 12.On condensate water heat exchanger branch road, between the first water outlet A and condensate water recuperator bypass or between the first water return outlet B and condensate water recuperator bypass, be provided with condensate water heat exchanger bypass flow control valve 7.As shown in Figure 1, in the present embodiment, condensate water heat exchanger bypass flow control valve 7 is between the first water outlet A and condensate water recuperator bypass.
The condensate water water inlet of condensate water heat exchanger 3 of the present utility model is connected with condensing water conduit k with pipeline g respectively by pipeline f with condensate water delivery port, and is provided with condensate water water intaking valve 13 on pipeline f, and pipeline g is provided with coagulation hydroenergy backwater valve 14.
The utility model is cooperatively interacted by closed cycle water main road flow control valve 6 and condensate water heat exchanger bypass flow control valve (7), the hot water that gas cooler 1 is produced point two-way under the promotion of closed cycle pump 5 enters flue gas heater 2 and condensate water heat exchanger 3 respectively, the hot water entering flue gas heater 2 is cooled to cold water after the neat stress of heating desulfurizing tower exhanst gas outlet, the hot water entering condensate water heat exchanger 3 is also cooled to cold water after adding the condensate water (or other medium) of Hot gas turbine, two-way cold water meets at closed cycle water main road under the promotion of closed cycle pump 5, and again sent into gas cooler 1, recycle.
Closed cycle water main road flow control valve 6 and condensate water heat exchanger bypass flow control valve 7 are for distributing the flow of the hot water entering flue gas heater 2 and condensate water heat exchanger 3, preferentially to ensure that the neat stress of desulfurizing tower exhanst gas outlet is heated to design temperature (being generally 80 DEG C) by flue gas heater 2, putting before this, just unnecessary hot water is assigned to condensate water heat exchanger 3, be used for adding the condensate water (or other medium) of Hot gas turbine, produce economic benefit.
When thermal power generation unit is in start operating performance, winter condition, pole running on the lower load or accident conditions, during the shortage of heat that gas cooler 1 reclaims, the auxiliary steam of power plant can be utilized, further heating closed cycle water, to ensure that neat stress is heated to safe temperature.
Therefore, in an embodiment of the present utility model, the water lateral line of the device fully utilized at fume afterheat of the present utility model can be provided with an auxiliary steam heater branch road.As shown in Figure 1, pipeline a of the present utility model is provided with the second delivery port C and the second water return outlet D successively.The closed cycle water water inlet of auxiliary steam heater 4 is connected with the second delivery port C by pipeline h, and the closed cycle water delivery port of auxiliary steam heater 4 is connected with the second water return outlet D by pipeline i, forms auxiliary steam heater branch road.As shown in Figure 1, in the present embodiment, the second delivery port C of the present utility model and the second water return outlet D is the first water outlet A on the first pipeline a and between flue gas heater 2.Meanwhile, on pipeline a of the present utility model, between the second delivery port C and the second water return outlet D, be also provided with auxiliary steam heater by-pass valve 15.Wherein, the pipeline h forming auxiliary steam heater branch road is also provided with auxiliary steam heater closed-up water water intaking valve 16, pipeline i is also provided with auxiliary steam heater closed-up water back-water valve (BWV) 17.
The auxiliary steam entrance of auxiliary steam heater 4 of the present utility model is connected with auxiliary steam pipeline l, the condensation-water drain of auxiliary steam heater 4 is connected with the water inlet of auxiliary steam drain tank 9, the delivery port of auxiliary steam drain tank 9 is connected with steam drainage recovery channel m, and on auxiliary steam pipeline l, be provided with auxiliary steam flow control valve 18, steam drainage recovery channel m is provided with Automatic steam trap Trap 19.
In normal conditions, auxiliary steam heater 4 of the present utility model does not need to come into operation.When thermal power generation unit is in start operating performance, winter condition, pole running on the lower load or accident conditions, during the shortage of heat that gas cooler 1 reclaims, before entering flue gas heater 2, auxiliary steam heater 4 is introduced into by making closed cycle water, utilize the auxiliary steam of power plant to heat closed cycle water further, can ensure that neat stress is heated to safe temperature by flue gas heater 2.Auxiliary steam heater 4 of the present utility model can ensure the continuous safe operation of the device that fume afterheat fully utilizes, and improves system to the adaptability of the various operating mode of unit.The flow of auxiliary steam of the present utility model can be regulated by auxiliary steam flow control valve 18, can recycling after the condensed water produced after auxiliary steam heating closed cycle water enters auxiliary steam drain tank 9.
In an embodiment of the present utility model, the water lateral line of the device fully utilized at fume afterheat of the present utility model also can be provided with a moisturizing branch road, closed cycle water is supplemented, to ensure that the flow loss that closed cycle water is in operation is supplemented in time.As shown in Figure 1, pipeline b of the present utility model is provided with water inlet E, the delivery port of water supply tank 8 is connected with water inlet E by pipeline j, forms moisturizing branch road.Moisturizing branch road is provided with water compensating valve 20.Water supply tank 8 of the present utility model can adopt high-order layout (or by other level pressure measure), to ensure there is certain pressure in closed cycle water main road, avoids recirculated water to vaporize at gas cooler 1, produces cavitation.In addition, also closed cycle water dosing measure can be set in moisturizing branch road, to ensure that the water quality of recirculated water reaches service requirement.
Gas cooler 1 of the present utility model and flue gas heater 2 are a kind of gas-water heat exchangers, and heating surface can adopt finned tube or the light pipe of spiral fin coil, H type extended surface tube, other form, and recirculated water is at Bottomhole pressure, and flue gas is in the flows outside of heat exchanger tube.Adopt the Tube Sheet of Heat Exchanger of the outer watchband extended surface of finned tube or other form, fume side heat exchange can be strengthened, make the compact conformation of gas cooler 1 and flue gas heater 2.
Condensate water heat exchanger 3 of the present utility model and auxiliary steam heater 4 can adopt pipe heat exchanger or plate type heat exchanger.
Under different unit loads, the exhaust gas volumn of unit can change, and now carries out water side Flow-rate adjustment by closed cycle pump 5 frequency conversion, adapts to different load variations with this.
The control system of the device of fume afterheat comprehensive utilization of the present utility model is mainly through completing water side Flow-rate adjustment, and main adjusting device is: closed cycle water main road flow control valve 6, condensate water heat exchanger bypass flow control valve 7, closed cycle pump 5 and auxiliary steam flow control valve 18.
Thermal technology's measuring point of the device of fume afterheat comprehensive utilization of the present utility model, as: thermal resistance, pressure transmitter, differential pressure transmitter, flowmeter, humidity detector etc., comprise the DCS system of all accessible generating set of supporting conditioning equipment, realize Automated condtrol.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, although the utility model discloses as above with preferred embodiment, but and be not used to limit the utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, when the method and technology contents that can utilize above-mentioned announcement are made a little change or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solutions of the utility model, according to any simple modification that technical spirit of the present utility model is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (8)
1. a device for fume afterheat comprehensive utilization, is characterized in that it comprises: gas cooler (1), flue gas heater (2) and closed cycle pump (5); Wherein, described gas cooler (1) is arranged on the flue of boiler air preheater exhanst gas outlet, and described flue gas heater (2) is arranged on the flue of desulfurizing tower exhanst gas outlet; The delivery port of described gas cooler (1) is connected by the first pipeline with the water inlet of described flue gas heater (2), the delivery port of described flue gas heater (2) is connected by second pipe with the water inlet of described gas cooler (1), forms closed cycle water main road; Described closed cycle pump (5) is arranged on described closed cycle water main road.
2. the device of fume afterheat comprehensive utilization according to claim 1, is characterized in that it also comprises: condensate water heat exchanger (3), closed cycle water main road flow control valve (6), condensate water heat exchanger bypass flow control valve (7), condensate water recuperator bypass valve (10), condensate water heat exchanger closed cycle water water intaking valve (11), condensate water heat exchanger closed cycle water back-water valve (BWV) (12), condensate water water intaking valve (13) and coagulation hydroenergy backwater valve (14);
Wherein, described first pipeline is provided with the first delivery port, described second pipe is provided with the first water return outlet;
The closed cycle water water inlet of described condensate water heat exchanger (3) is connected with described first delivery port by the 3rd pipeline, the closed cycle water delivery port of described condensate water heat exchanger (3) is connected with described first water return outlet by the 4th pipeline, forms condensate water heat exchanger branch road;
Described closed cycle water main road flow control valve (6) is arranged on described closed cycle water main road, and is positioned between described first delivery port and described flue gas heater (2) or between described first water return outlet and described flue gas heater (2);
Described 3rd pipeline is also directly connected by the 5th pipeline with described 4th pipeline, and form condensate water recuperator bypass, described condensate water recuperator bypass valve (10) is arranged on described condensate water recuperator bypass;
Described condensate water heat exchanger closed cycle water water intaking valve (11) is arranged on described 3rd pipeline, and is positioned between described condensate water recuperator bypass and described condensate water heat exchanger (3);
Described condensate water heat exchanger closed cycle water back-water valve (BWV) (12) is arranged on described 4th pipeline, and is positioned between described condensate water recuperator bypass and described condensate water heat exchanger (3);
Described condensate water heat exchanger bypass flow control valve (7) is arranged on described condensate water heat exchanger branch road, and between described first delivery port and described condensate water recuperator bypass or between described first water return outlet and described condensate water recuperator bypass;
The condensate water water inlet of described condensate water heat exchanger (3) and condensate water delivery port are connected with condensing water conduit respectively by the 6th pipeline and the 7th pipeline, described condensate water water intaking valve (13) is arranged on described 6th pipeline, and described coagulation hydroenergy backwater valve (14) is arranged on described 7th pipeline.
3. the device of fume afterheat comprehensive utilization according to claim 1 and 2, is characterized in that it also comprises: auxiliary steam heater (4), auxiliary steam heater by-pass valve (15), auxiliary steam heater closed-up water water intaking valve (16), auxiliary steam heater closed-up water back-water valve (BWV) (17), auxiliary steam drain tank (9), auxiliary steam flow control valve (18) and Automatic steam trap Trap (19);
Wherein, described first pipeline is provided with the second delivery port and the second water return outlet successively;
The closed cycle water water inlet of described auxiliary steam heater (4) is connected with described second delivery port by the 8th pipeline, the closed cycle water delivery port of described auxiliary steam heater (4) is connected with described second water return outlet by the 9th pipeline, forms auxiliary steam heater branch road;
Described auxiliary steam heater by-pass valve (15) is arranged on described first pipeline, and between described second delivery port and described second water return outlet;
Described auxiliary steam heater closed-up water water intaking valve (16) is arranged on described 8th pipeline, and described auxiliary steam heater closed-up water back-water valve (BWV) (17) is arranged on described 9th pipeline;
The auxiliary steam entrance of described auxiliary steam heater (4) is connected with auxiliary steam pipeline; The condensation-water drain of described auxiliary steam heater (4) is connected with the water inlet of described auxiliary steam drain tank (9), and the delivery port of described auxiliary steam drain tank (9) is connected with steam drainage recovery channel;
Described auxiliary steam flow control valve (18) is arranged on described auxiliary steam pipeline, and described Automatic steam trap Trap (19) is arranged on described steam drainage recovery channel.
4. the device of fume afterheat comprehensive utilization according to claim 3, is characterized in that it also comprises: water supply tank (8) and water compensating valve (20); Described second pipe is provided with water inlet, and the delivery port of described water supply tank (8) is connected with described water inlet by the tenth pipeline, forms moisturizing branch road; Described water compensating valve (20) is arranged on described moisturizing branch road.
5. the device of fume afterheat comprehensive utilization according to claim 4, is characterized in that wherein said gas cooler (1) is arranged between described boiler air preheater exhanst gas outlet and electric cleaner; Or be arranged between electric cleaner and described desulfurizing tower.
6. the device of fume afterheat comprehensive utilization according to claim 3, is characterized in that wherein said gas cooler (1) is arranged between described boiler air preheater exhanst gas outlet and electric cleaner; Or be arranged between electric cleaner and described desulfurizing tower.
7. the device of fume afterheat comprehensive utilization according to claim 1 and 2, is characterized in that wherein said gas cooler (1) is arranged between described boiler air preheater exhanst gas outlet and electric cleaner; Or be arranged between electric cleaner and described desulfurizing tower.
8. the device of fume afterheat comprehensive utilization according to claim 1, is characterized in that the heating surface of wherein said gas cooler (1) and described flue gas heater (2) adopts finned tube or the light pipe of spiral fin coil, H type extended surface tube, other form.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104048307A (en) * | 2014-05-29 | 2014-09-17 | 舒少辛 | Smoke waste heat comprehensive utilization device and method |
| CN104949100A (en) * | 2015-06-24 | 2015-09-30 | 江苏海德节能科技有限公司 | Energy saving system of thermal power plant |
| CN105180144A (en) * | 2015-08-14 | 2015-12-23 | 中国能源建设集团广东省电力设计研究院有限公司 | Boiler flue gas waste heat recovery system |
| CN105423325A (en) * | 2015-12-24 | 2016-03-23 | 哈尔滨锅炉厂有限责任公司 | Steam cooling system for low-temperature smoke and working method |
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- 2014-05-29 CN CN201420283255.9U patent/CN204026714U/en not_active Withdrawn - After Issue
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|---|---|---|---|---|
| CN104048307A (en) * | 2014-05-29 | 2014-09-17 | 舒少辛 | Smoke waste heat comprehensive utilization device and method |
| CN104048307B (en) * | 2014-05-29 | 2016-09-28 | 舒少辛 | A kind of device of fume afterheat comprehensive utilization |
| CN104949100A (en) * | 2015-06-24 | 2015-09-30 | 江苏海德节能科技有限公司 | Energy saving system of thermal power plant |
| CN105180144A (en) * | 2015-08-14 | 2015-12-23 | 中国能源建设集团广东省电力设计研究院有限公司 | Boiler flue gas waste heat recovery system |
| CN105180144B (en) * | 2015-08-14 | 2018-03-16 | 中国能源建设集团广东省电力设计研究院有限公司 | Residual heat from boiler fume recovery system |
| CN105423325A (en) * | 2015-12-24 | 2016-03-23 | 哈尔滨锅炉厂有限责任公司 | Steam cooling system for low-temperature smoke and working method |
| CN105674315A (en) * | 2016-04-12 | 2016-06-15 | 国电南京自动化股份有限公司 | Double-circuit and double-circulation heat exchanging system |
| CN105674315B (en) * | 2016-04-12 | 2017-11-28 | 国电南京自动化股份有限公司 | A kind of two-way Two-way Cycle heat-exchange system |
| CN106016326A (en) * | 2016-07-11 | 2016-10-12 | 浙江浙能嘉华发电有限公司 | Smoke waste heat recycling device and method of pipe type GGH system of smoke ultra-low emission coal-fired power generation unit |
| CN106016328A (en) * | 2016-07-11 | 2016-10-12 | 浙江浙能嘉华发电有限公司 | Drained water recycling device and method based on heating medium water steam heater |
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