CN104048307B - 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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- CN104048307B CN104048307B CN201410235718.9A CN201410235718A CN104048307B CN 104048307 B CN104048307 B CN 104048307B CN 201410235718 A CN201410235718 A CN 201410235718A CN 104048307 B CN104048307 B CN 104048307B
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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 invention relates to the device that a kind of fume afterheat comprehensively utilizes.This device includes: 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 outlet of gas cooler is connected by the first pipeline with the water inlet of flue gas heater, and the outlet of flue gas heater is connected by second pipe with the water inlet of gas cooler, constitutes closed cycle water main road；Closed cycle pump is arranged on described closed cycle water main road.The present invention heats the neat stress of wet desulfuration tower exhanst gas outlet mainly by the waste heat of the boiler exhaust gas of thermal power generation unit as thermal source, and its use operates steadily, safe and environment-friendly, has good effects of energy conservation and environmental protection.
Description
Technical field
The invention belongs to electric power energy-saving, field of Environment Protection, particularly relate to the device of a kind of fume afterheat comprehensive utilization.
Background technology
Along with society's pay attention to day by day to environmental conservation, in order to protect air quality, thermal power plant the most all have employed flue gas
Desulfurization technology.Wherein Wet Limestone Desulfurization is because possessing the advantages such as technology maturation, efficiency are high, reliable, is obtained extensively fortune
With.At present, wet desulfurization system is essentially all employing " wet flue gas discharge " scheme, will flow through the neat stress after desulfuration absorbing tower
Directly by chimney to airborne release.Neat stress owing to discharging from desulfuration absorbing tower is saturated wet flue gas, through downstream cigarette
When road and chimney, condensation can be met and bear water and dissolve multiple acidic materials, downstream flue and chimney are caused cold end corrosion.Separately
Outward, at the wet flue gas of chimney breast, temperature decrease during owing to discharging chimney, a large amount of liquid can be condensed out near chimney breast rapidly
Dripping, and settle around chimney, owing to containing the product Gypsum Fibrosum of wet desulphurization in this drop, the most this sedimentation is commonly called as " stone
Cream rain ", this wet flue gas directly discharges " gypsum rain " of generation by chimney can cause the pollution of surrounding.
At present, on the one hand, the exhaust gas temperature of the boiler air preheater of thermal power plant typically at 120 DEG C to 150 DEG C, still has
Certain waste heat recovery is had to be worth.On the other hand, modal smoke dust-removing equipment during electric cleaner is thermal power plant.Removed by electricity
The restriction of dirt device working mechanism, electric cleaner is difficult to all remove totally the dust in flue gas.Substantial amounts of research and put into practice table
Bright, when the flue-gas temperature of entrance electric cleaner is relatively low, the efficiency of dust collection of electric cleaner can be improved, reduce flying dust, the discharge of dust
Concentration.
If it is possible to the smoke discharging residual heat of boiler air preheater is reclaimed, and utilize boiler air preheater
Smoke discharging residual heat improve the temperature of the neat stress after desulfurizing tower, make neat stress enter superheat state, it will effectively to eliminate
Neat stress is to the cold end corrosion of downstream flue and chimney and " gypsum rain " phenomenon, protection equipment and surrounding, and saves the energy.
And if in reducing the temperature of flue gas before electric cleaner, it is also possible to improve the efficiency of dust collection of electric cleaner.If it addition, will be many
Remaining heat is used for heating unit and condenses water (or other medium), then can also obtain economic benefit.
Summary of the invention
In view of this, it is an object of the invention to, it is provided that the device of a kind of new fume afterheat comprehensive utilization, solve
Technical problem is that and make it utilize the smoke discharging residual heat of boiler air preheater to improve the temperature of neat stress after desulfurization, eliminate clean cigarette
Gas, to the cold end corrosion of downstream flue and chimney and " gypsum rain " phenomenon, protection equipment and surrounding, reduces anticorrosion investment, reaches
Purpose to energy-saving and environmental protection.
Another object of the present invention is to, it is provided that the device of a kind of new fume afterheat comprehensive utilization, skill to be solved
Art problem is through reducing the flue-gas temperature of electric cleaner entrance, improves the efficiency of dust collection of electric cleaner, reduces flying dust row
High-volume, reduce the evaporation capacity of desulfurizing tower, reach the purpose of energy-saving and environmental protection.
It is a further object of the present invention to provide the device of a kind of new fume afterheat comprehensive utilization, skill to be solved
Art problem is to make 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 object of the invention to solve the technical problems realizes by the following technical solutions.Propose according to the present invention
The device of a kind of fume afterheat comprehensive utilization, comprising: 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 at desulfurizing tower
On the flue of exhanst gas outlet；The outlet of described gas cooler is connected by the first pipeline with the water inlet of described flue gas heater
Connecing, the outlet of described flue gas heater is connected by second pipe with the water inlet of described gas cooler, constitutes enclosed and follows
Ring water main road；Described closed cycle pump is arranged on described closed cycle water main road.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The device of aforesaid fume afterheat comprehensive utilization, also includes: condense water-to-water heat exchanger, closed cycle water main road flow is adjusted
Joint valve, condensation water-to-water heat exchanger bypass flow regulation valve, condensation water-to-water heat exchanger bypass valve, condensation water-to-water heat exchanger closed cycle water water inlet
Valve, condensation water-to-water heat exchanger closed cycle water back-water valve (BWV), condensation water water intaking valve and coagulation hydroenergy backwater valve；Wherein, manage described first
Road is provided with the first outlet, is provided with the first water return outlet on described second pipe；The closed cycle of described condensation water-to-water heat exchanger
Water water inlet is connected with described first outlet by the 3rd pipeline, and the closed cycle water outlet of described condensation water-to-water heat exchanger leads to
Cross the 4th pipeline to be connected with described first water return outlet, constitute and condense water-to-water heat exchanger branch road；Described closed cycle water main road flow is adjusted
Joint valve is arranged on described closed cycle water main road, and between described first outlet and described flue gas heater or described
Between first water return outlet and described flue gas heater；Described 3rd pipeline directly connects also by the 5th pipeline with described 4th pipeline
Connecing, constitute and condense water-to-water heat exchanger bypass, described condensation water-to-water heat exchanger bypass valve is arranged in the bypass of described condensation water-to-water heat exchanger；Institute
State condensation water-to-water heat exchanger closed cycle water water intaking valve to be arranged on described 3rd pipeline, and be positioned at the bypass of described condensation water-to-water heat exchanger
And between described condensation water-to-water heat exchanger；Described condensation water-to-water heat exchanger closed cycle water back-water valve (BWV) is arranged on described 4th pipeline,
And between the bypass of described condensation water-to-water heat exchanger and described condensation water-to-water heat exchanger；Described condensation water-to-water heat exchanger bypass flow regulates
Valve is arranged on described condensation water-to-water heat exchanger branch road, and between described first outlet and described condensation water-to-water heat exchanger bypass
Or between described first water return outlet and the bypass of described condensation water-to-water heat exchanger；The condensation water water inlet of described condensation water-to-water heat exchanger and solidifying
Bearing water outlet to be connected with condensing water conduit by the 6th pipeline and the 7th pipeline respectively, described condensation water water intaking valve is arranged at institute
Stating on the 6th pipeline, described coagulation hydroenergy backwater valve is arranged on described 7th pipeline.
The device of aforesaid fume afterheat comprehensive utilization, also includes: 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 sequentially provided with the second outlet and the second backwater
Mouthful；The closed cycle water water inlet of described auxiliary steam heater is connected with described second outlet by the 8th pipeline, described
The closed cycle water outlet of auxiliary steam heater is connected with described second water return outlet by the 9th pipeline, constitutes auxiliary steam
Heater branch road；Described auxiliary steam heater by-pass valve is arranged on described first pipeline, and is positioned at described second outlet
And between described second water return outlet；Described auxiliary steam heater closed-up water water intaking valve is arranged on described 8th pipeline, described
Auxiliary steam heater closed-up water back-water valve (BWV) is arranged on described 9th pipeline；The auxiliary steam of described auxiliary steam heater enters
Mouth is connected with auxiliary steam pipeline；The condensation-water drain of described auxiliary steam heater and the water inlet of described auxiliary steam drain tank
Mouth connects, and the outlet of described auxiliary steam drain tank is connected with steam drainage recovery channel；Described auxiliary steam Flow-rate adjustment
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 includes: water supply tank and water compensating valve；Described second pipe sets
Having water inlet, the outlet of described water supply tank is connected with described water inlet by the tenth pipeline, constitutes moisturizing branch road；Described moisturizing
Valve is arranged on described moisturizing branch road.
The device of aforesaid fume afterheat comprehensive utilization, it is pre-that wherein said gas cooler is disposed on described boiler air
Between hot device exhanst gas outlet and electric cleaner.
The device of aforesaid fume afterheat comprehensive utilization, wherein said gas cooler is disposed on electric cleaner with described
Between desulfurizing tower.
Being heated of the device of aforesaid fume afterheat comprehensive utilization, wherein said gas cooler and described flue gas heater
Face uses spiral fin coil, H type extended surface tube, the finned tube of other form or light pipe.
The object of the invention to solve the technical problems realizes the most by the following technical solutions.Propose according to the present invention
The method of a kind of fume afterheat comprehensive utilization, is the neat stress after utilizing the smoke discharging residual heat of boiler air preheater to add thermally desulfurizing.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The method of aforesaid fume afterheat comprehensive utilization, wherein utilizes the smoke discharging residual heat of boiler air preheater to add thermally desulfurizing
After neat stress after obtain cooling boiler exhaust gas enter electric cleaner, carry out dust removal process.
The method of aforesaid fume afterheat comprehensive utilization, after wherein the smoke discharging residual heat at boiler air preheater adds thermally desulfurizing
Neat stress while, also utilize the smoke discharging residual heat heat-setting water of boiler air preheater.
The present invention compared with prior art has clear advantage and beneficial effect.By technique scheme, the present invention
The device of a kind of fume afterheat comprehensive utilization at least has following advantages and a beneficial effect:
One, the present invention is by reclaiming the smoke discharging residual heat of boiler air preheater, and is used for carrying by the waste heat of recovery
The temperature of neat stress after high desulfurization, makes neat stress enter superheat state, it is to avoid wet flue gas is to downstream flue and the low temperature of chimney
Corrosion, protects electric power factory equipment, significantly reduces the anticorrosion investment of downstream flue and chimney.
Two, the present invention is by reclaiming the smoke discharging residual heat of boiler air preheater, and is used for carrying by the waste heat of recovery
The temperature of neat stress after high desulfurization, improves the chimney rising height to flue gas, eliminates chimney breast and emits " white cigarette " (water steaming
Vapour) phenomenon, it is to avoid the sedimentation of " gypsum rain " around chimney, protect the environment around power plant.
Three, the present invention is by reducing the flue-gas temperature of electric cleaner entrance, improves the efficiency of dust collection of electric cleaner, reduces
The discharge capacity of flying dust, protects environment.
Four, the present invention 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, has saved water for industrial use.
Five, the present invention by the smoke discharging residual heat of partially recycled boiler air preheater is used for heat-setting water (or its
Its medium), certain economic benefit can be produced.
Six, present configuration is simple, operates steadily, safe and reliable.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, and in order to allow the above and other objects, features and advantages of the present invention can
Become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, describe 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 of present invention comprehensive utilization.
1: gas cooler 2: flue gas heater
3: condensation water-to-water heat exchanger 4: auxiliary steam heater
5: closed cycle pump 6: closed cycle water main road flow control valve
7: condensation water-to-water heat exchanger bypass flow regulation valve 8: water supply tank；
9: auxiliary steam drain tank 10: condense water-to-water heat exchanger bypass valve
11: condense water-to-water heat exchanger closed-up water water intaking valve 12: condense water-to-water heat exchanger closed-up water back-water valve (BWV)
13: condensation 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 outlet the D: the second water return outlet
E: water inlet
Detailed description of the invention
By further illustrating the technological means and effect that the present invention taked by reaching predetermined goal of the invention, below in conjunction with
Accompanying drawing and preferred embodiment, its detailed description of the invention of device that a kind of fume afterheat proposed according to the present invention is comprehensively utilized,
Structure, method, step, feature and effect thereof, after describing in detail such as.
Refer to shown in Fig. 1, be the signal of a preferred embodiment of the device of a kind of fume afterheat of present invention comprehensive utilization
Figure.The device of a kind of fume afterheat of present invention comprehensive utilization is mainly by gas cooler 1, flue gas heater 2 and closed cycle pump 5
Composition.Wherein, gas cooler 1 is arranged on the flue of boiler air preheater exhanst gas outlet, and flue gas heater 2 is arranged at de-
On the flue of sulfur tower flue gas outlet.The outlet of gas cooler 1 is connected by pipeline a with the water inlet of flue gas heater 2, cigarette
The outlet of hot-air heater 2 is connected by pipeline b with the water inlet of gas cooler 1, constitutes closed cycle water main road.Enclosed is followed
Ring pump 5 is arranged on closed cycle water main road.As it is shown in figure 1, in the present embodiment, closed cycle pump 5 is disposed on pipeline a
On.
The present invention is by arranging gas cooler 1 on the flue of boiler air preheater exhanst gas outlet, at desulfurizing tower cigarette
Gas exports to arrange on the flue between chimney flue gas heater 2, and by water lateral line and gas cooler 1 and flue gas
Device 2 connects formation water side closed cycle, it is achieved the recovery to the smoke discharging residual heat of boiler air preheater, and utilizes boiler air pre-
The smoke discharging residual heat of hot device adds the neat stress after thermally desulfurizing.Wherein, the 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 discharged from boiler air preheater exhanst gas outlet, reduces cigarette
The temperature of gas, and heat closed cycle water, make closed cycle water be heated to be hot water in gas cooler 1, hot water is in enclosed
Enter flue gas heater 2 by water lateral line under the promotion of circulating pump 5, enter the hot water heating of flue gas heater 2 from desulfurizing tower
The neat stress discharged of exhanst gas outlet, and in flue gas heater 2, be cooled to cold water, cold water is in the promotion of closed cycle pump 5
Under be again admitted to gas cooler 1 further through water lateral line, recycle.
The present invention can make the temperature of the saturated wet flue gas from the discharge of desulfurizing tower exhanst gas outlet rise to 80 DEG C of left sides from 50 DEG C
The right side, enters superheat state, it is to avoid downstream flue and the cold end corrosion of chimney, the anticorrosion significantly reducing chimney are thrown by wet flue gas
Money；Improve the chimney rising height to flue gas simultaneously, improve chimney and emit the phenomenon of white steam, eliminate certain limit around chimney
The phenomenon that interior " gypsum rain " settles, reduces pollutant flooring concentration, protects environment.
In one embodiment of this invention, the gas cooler 1 of the present invention is disposed on boiler air preheater flue gas and goes out
Between mouth and electric cleaner.The temperature being made the flue gas of entrance electric cleaner by gas cooler 1 is reduced, volume contraction, volume
Flow reduces, and makes flue gas flow velocity in electric precipitation reduce, thus improves the efficiency of dust collection of electric cleaner, reduces fly ash emission.
Further, since most flying dusts, at this temperature section, along with temperature reduces, fly ash resistivity also decreases, and flying dust is easier to
Being caught by electric cleaner, therefore the efficiency of dust collection of electric cleaner can be further improved.Simultaneously as flue-gas temperature reduces,
The evaporation capacity in desulfurizing tower can also be reduced, save water for industrial use.
In another embodiment of the invention, the gas cooler 1 of the present invention is disposed on electric cleaner and desulfurizing tower cigarette
Between.Now, the setting of gas cooler 1 still can be lowered into the temperature of the flue gas of desulfurizing tower, reduces the steaming in desulfurizing tower
Send out amount, save water for industrial use, but the efficiency of dust collection of electric cleaner is not improved.
The exhaust gas temperature higher (>=140 DEG C) of a lot of thermal power generation unit, such as, be in summer condition or high negative when unit
During lotus operating mode, now the heat of closed cycle Water Sproading is more, and flue-gas temperature can be reduced to 90 DEG C of left sides by such as closed cycle water
The right side, to improve efficiency of dust collection, can be heated the condensation water of turbine system, obtain by the hot water of shunting part closed cycle water
Economic benefit, the hot water of the part closed cycle water of shunting can be used for heating other medium, such as: heat supply network water, a life
Hot water, power plant's moisturizing etc. alive, can obtain different economic benefits, it is achieved the energy-conservation comprehensive utilization with environmental protection.
Therefore, in one embodiment of this invention, the water lateral line of the device comprehensively utilized at the fume afterheat of the present invention
On can be provided with a condensation water-to-water heat exchanger branch road.As it is shown in figure 1, be provided with the first water outlet A on the pipeline a of the present invention, at pipeline b
It is provided with the first water return outlet B.The closed cycle water water inlet condensing water-to-water heat exchanger 3 is connected by pipeline c and the first water outlet A,
The closed cycle water outlet condensing water-to-water heat exchanger 3 is connected by pipeline d and the first water return outlet B, constitutes and condenses water-to-water heat exchanger
Branch road.Meanwhile, on closed cycle water main road, between the first water outlet A and flue gas heater 2 or the first water return outlet B and flue gas
Between heater 2, it is provided with closed cycle water main road flow control valve 6.As it is shown in figure 1, in the present embodiment, closed cycle water master
Road flow control valve 6 is between the first water outlet A and flue gas heater 2.
Wherein, the pipeline c constituting condensation water-to-water heat exchanger branch road is directly connected to also by pipeline e with pipeline d, constitutes and condenses water
Recuperator bypass.Condensation water-to-water heat exchanger bypass valve 10 it is provided with in water-to-water heat exchanger bypass condensing.On pipeline c, condense water heat exchange
Between device bypass and condensation water-to-water heat exchanger 3, it is additionally provided with condensation water-to-water heat exchanger closed cycle water water intaking valve 11.On pipeline d, condense
Between water-to-water heat exchanger bypass and condensation water-to-water heat exchanger 3, it is additionally provided with condensation water-to-water heat exchanger closed cycle water back-water valve (BWV) 12.Condensing water
On heat exchanger branch road, the first water outlet A and condense water-to-water heat exchanger bypass between or the first water return outlet B with condense water-to-water heat exchanger bypass
Between, it is provided with condensation water-to-water heat exchanger bypass flow regulation valve 7.As it is shown in figure 1, in the present embodiment, water-to-water heat exchanger branch road is condensed
Flow control valve 7 is in the first water outlet A and condenses between water-to-water heat exchanger bypass.
The condensation water water inlet condensing water-to-water heat exchanger 3 of the present invention and condensation water outlet are respectively by pipeline f and pipe
Road g is connected with condensing water conduit k, and is provided with condensation water water intaking valve 13 on pipeline f, is provided with coagulation hydroenergy backwater on pipeline g
Valve 14.
The present invention is by closed cycle water main road flow control valve 6 and condenses water-to-water heat exchanger bypass flow regulation valve (7) phase
Coordinating mutually, the hot water point two-way under the promotion of closed cycle pump 5 making gas cooler 1 produce respectively enters flue gas heater 2
With condensation water-to-water heat exchanger 3, the hot water entering flue gas heater 2 is cooled to cold after the neat stress of heating desulfurizing tower exhanst gas outlet
Water, enters and condenses the hot water of water-to-water heat exchanger 3 and be also cooled to cold water after adding the condensation water (or other medium) of Hot gas turbine, and two
Road cold water meets at closed cycle water main road under the promotion of closed cycle pump 5, and is re-fed into gas cooler 1, circulation
Use.
Closed cycle water main road flow control valve 6 and condensation water-to-water heat exchanger bypass flow regulation valve 7 are used for distributing into cigarette
With preferential, the flow of the hot water of hot-air heater 2 and condensation water-to-water heat exchanger 3, ensures that flue gas heater 2 is by desulfurizing tower exhanst gas outlet
Neat stress is heated to design temperature (generally 80 DEG C), puts before this, is just assigned to unnecessary hot water condense water-to-water heat exchanger
3, it is used for adding the condensation water (or other medium) of Hot gas turbine, produces economic benefit.
When thermal power generation unit is in start operating performance, winter condition, extremely low load condition or accident conditions, gas cooler
During the shortage of heat that 1 reclaims, the auxiliary steam of available power plant, further heating closed cycle water, to ensure that neat stress is added
Heat is to the temperature of safety.
Therefore, in one embodiment of this invention, the water lateral line of the device comprehensively utilized at the fume afterheat of the present invention
On can be provided with an auxiliary steam heater branch road.As it is shown in figure 1, be sequentially provided with on the pipeline a of the present invention the second outlet C and
Second water return outlet D.The closed cycle water water inlet of auxiliary steam heater 4 is connected by pipeline h and the second outlet C, auxiliary
The closed cycle water outlet helping steam heater 4 is connected by pipeline i and the second water return outlet D, constitutes auxiliary steam heater
Branch road.As it is shown in figure 1, in the present embodiment, the second outlet C and the second water return outlet D of the present invention are on the first pipeline a
The first water outlet A and flue gas heater 2 between.Meanwhile, on the pipeline a of the present invention, the second outlet C and the second water return outlet
Between D, it is additionally provided with auxiliary steam heater by-pass valve 15.Wherein, the pipeline h constituting auxiliary steam heater branch road also sets
There is auxiliary steam heater closed-up water water intaking valve 16, pipeline i is additionally provided with auxiliary steam heater closed-up water back-water valve (BWV) 17.
The auxiliary steam entrance of the auxiliary steam heater 4 of the present invention is connected with auxiliary steam pipeline l, and auxiliary steam heats
The condensation-water drain of device 4 is connected with the water inlet of auxiliary steam drain tank 9, and the outlet of auxiliary steam drain tank 9 is dredged with steam
Water Sproading pipeline m connects, and is provided with auxiliary steam flow control valve 18 on auxiliary steam pipeline l, reclaims at steam drainage
Pipeline m is provided with Automatic steam trap Trap 19.
In normal conditions, the auxiliary steam heater 4 of the present invention need not come into operation.When thermal power generation unit is in
Start operating performance, winter condition, extremely low load condition or accident conditions, during the shortage of heat that gas cooler 1 reclaims, close by making
Formula recirculated water is introduced into auxiliary steam heater 4 before entering flue gas heater 2, utilizes the auxiliary steam of power plant to heat further
Closed cycle water, it is ensured that neat stress is heated to safe temperature by flue gas heater 2.The auxiliary steam of the present invention adds
Hot device 4 can ensure that the continuous safe operation of the device that fume afterheat comprehensively utilizes, and improves system operating mode various to unit and fits
Ying Xing.The flow of the auxiliary steam of the present invention can be adjusted by auxiliary steam flow control valve 18, and auxiliary steam heats
The condensed water produced after closed cycle water can be with recycling after entering auxiliary steam drain tank 9.
In one embodiment of this invention, the water lateral line of the device comprehensively utilized at the fume afterheat of the present invention also may be used
Be provided with a moisturizing branch road, closed cycle water supplemented, with ensure the flow loss that closed cycle water is in operation obtain and
Time supplement.As it is shown in figure 1, be provided with water inlet E on the pipeline b of the present invention, the outlet of water supply tank 8 passes through pipeline j and water inlet
Mouth E connects, and constitutes moisturizing branch road.Moisturizing branch road is provided with water compensating valve 20.The water supply tank 8 of the present invention can use high-order layout
(or by other level pressure measure), to ensure there is certain pressure in closed cycle water main road, it is to avoid recirculated water is cold at flue gas
But device 1 vaporizes, and produces cavitation.It addition, closed cycle water dosing measure also can be arranged in moisturizing branch road, to ensure circulation
The water quality of water reaches service requirement.
The gas cooler 1 of the present invention and flue gas heater 2 are a kind of gas-water heat exchangers, and heating surface can use spiral shell
Rotation finned tube, H type extended surface tube, the finned tube of other form or light pipe, recirculated water is at Bottomhole pressure, and flue gas is in the outside of heat exchanger tube
Flowing.Use 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 cigarette
Gas Cooler 1 and the compact conformation of flue gas heater 2.
Condensation water-to-water heat exchanger 3 and the auxiliary steam heater 4 of the present invention can use pipe heat exchanger or plate type heat exchanger.
Under different unit loads, the exhaust gas volumn of unit can change, and now can be entered by closed cycle pump 5 frequency conversion
Hang Shui side Flow-rate adjustment, adapts to different load variations with this.
The control system of the device of the fume afterheat comprehensive utilization of the present invention is mainly by completing water side Flow-rate adjustment, main
The adjusting means is wanted to be: closed cycle water main road flow control valve 6, to condense water-to-water heat exchanger bypass flow regulation valve 7, closed cycle pump
5 and auxiliary steam flow control valve 18.
Thermal technology's measuring point of the device of the fume afterheat comprehensive utilization of the present invention, such as: thermal resistance, pressure transmitter, differential pressure become
Send device, effusion meter, humidity detector etc., all can be accessed by the DCS system of generating set including supporting regulation equipment, it is achieved automatization
Control.
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any pro forma restriction, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any technology people being familiar with this specialty
Member, in the range of without departing from technical solution of the present invention, when the method for available the disclosure above and technology contents make a little more
Move or be modified to the Equivalent embodiments of equivalent variations, as long as being the content without departing from technical solution of the present invention, according to the present invention's
Any simple modification, equivalent variations and the modification that above example is made by technical spirit, all still falls within technical solution of the present invention
In the range of.
Claims (6)
1. the device of a fume afterheat comprehensive utilization, it is characterised in that comprising: gas cooler (1), flue gas heater
(2), closed cycle pump (5), condensation water-to-water heat exchanger (3), closed cycle water main road flow control valve (6), condensation water-to-water heat exchanger prop up
Road flow control valve (7), condensation water-to-water heat exchanger bypass valve (10), condensation water-to-water heat exchanger closed cycle water water intaking valve (11), condensation
Water-to-water heat exchanger closed cycle water back-water valve (BWV) (12), condensation water water intaking valve (13) and coagulation hydroenergy backwater valve (14)；
Wherein, described gas cooler (1) is arranged on the flue of boiler air preheater exhanst gas outlet, described flue gas heater
(2) it is arranged on the flue of desulfurizing tower exhanst gas outlet；The outlet of described gas cooler (1) and described flue gas heater (2)
Water inlet connected by the first pipeline, the water inlet of the outlet of described flue gas heater (2) and described gas cooler (1)
Connected by second pipe, constitute closed cycle water main road；Described closed cycle pump (5) is arranged at described closed cycle water main road
On；
Described first pipeline is provided with the first outlet, described second pipe is provided with the first water return outlet；
The closed cycle water water inlet of described condensation water-to-water heat exchanger (3) is connected with described first outlet by the 3rd pipeline, institute
State the closed cycle water outlet condensing water-to-water heat exchanger (3) to be connected with described first water return outlet by the 4th pipeline, constitute and condense
Water-to-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 at described first
Between outlet and described flue gas heater (2) or between described first water return outlet and described flue gas heater (2)；
Described 3rd pipeline is directly connected to also by the 5th pipeline with described 4th pipeline, constitutes and condenses water-to-water heat exchanger bypass, institute
State condensation water-to-water heat exchanger bypass valve (10) to be arranged in the bypass of described condensation water-to-water heat exchanger；
Described condensation water-to-water heat exchanger closed cycle water water intaking valve (11) is arranged on described 3rd pipeline, and is positioned at described condensation water
Between recuperator bypass and described condensation water-to-water heat exchanger (3)；
Described condensation water-to-water heat exchanger closed cycle water back-water valve (BWV) (12) is arranged on described 4th pipeline, and is positioned at described condensation water
Between recuperator bypass and described condensation water-to-water heat exchanger (3)；
Described condensation water-to-water heat exchanger bypass flow regulation valve (7) is arranged on described condensation water-to-water heat exchanger branch road, and is positioned at described
Between first outlet and the bypass of described condensation water-to-water heat exchanger or described first water return outlet and described condensation water-to-water heat exchanger bypass it
Between；
The condensation water water inlet of described condensation water-to-water heat exchanger (3) and condensation water outlet are respectively by the 6th pipeline and the 7th pipeline
Being connected with condensing water conduit, described condensation water water intaking valve (13) is arranged on described 6th pipeline, described coagulation hydroenergy backwater valve
(14) it is arranged on described 7th pipeline.
The device of fume afterheat the most according to claim 1 comprehensive utilization, it is characterised in that it also includes: auxiliary steam adds
Hot device (4), auxiliary steam heater by-pass valve (15), auxiliary steam heater closed-up water water intaking valve (16), auxiliary steam heat
Device 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 sequentially provided with the second outlet and the second water return outlet；
The closed cycle water water inlet of described auxiliary steam heater (4) is connected with described second outlet by the 8th pipeline,
The closed cycle water outlet of described auxiliary steam heater (4) is connected with described second water return outlet by the 9th pipeline, constitutes
Auxiliary steam heater branch road；
Described auxiliary steam heater by-pass valve (15) is arranged on described first pipeline, and is positioned at described second outlet and institute
State between the second water return outlet；
Described auxiliary steam heater closed-up water water intaking valve (16) is arranged on described 8th pipeline, 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；Described auxiliary steam heater
(4) condensation-water drain is connected with the water inlet of described auxiliary steam drain tank (9), going out of described auxiliary steam drain tank (9)
The mouth of a river 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.
The device of fume afterheat the most according to claim 2 comprehensive utilization, it is characterised in that it also includes: water supply tank (8)
And water compensating valve (20)；Being provided with water inlet on described second pipe, the outlet of described water supply tank (8) passes through the tenth pipeline and institute
State water inlet to connect, constitute moisturizing branch road；Described water compensating valve (20) is arranged on described moisturizing branch road.
4. the device comprehensively utilized according to the fume afterheat described in any claim in claims 1 to 3, it is characterised in that its
Described in gas cooler (1) be disposed between described boiler air preheater exhanst gas outlet and electric cleaner.
5. the device comprehensively utilized according to the fume afterheat described in any claim in claims 1 to 3, it is characterised in that its
Described in gas cooler (1) be disposed between electric cleaner and described desulfurizing tower.
The device of fume afterheat the most according to claim 1 comprehensive utilization, it is characterised in that wherein said gas cooler
And the heating surface of described flue gas heater (2) uses spiral fin coil, H type extended surface tube, the finned tube of other form or light (1)
Pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410235718.9A CN104048307B (en) | 2014-05-29 | 2014-05-29 | A kind of device of fume afterheat comprehensive utilization |
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|---|---|---|---|
| CN201410235718.9A CN104048307B (en) | 2014-05-29 | 2014-05-29 | A kind of device of fume afterheat comprehensive utilization |
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| Publication Number | Publication Date |
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| CN104048307A CN104048307A (en) | 2014-09-17 |
| CN104048307B true CN104048307B (en) | 2016-09-28 |
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| CN201410235718.9A Expired - Fee Related CN104048307B (en) | 2014-05-29 | 2014-05-29 | A kind of device of fume afterheat comprehensive utilization |
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