CN106051805A - Waste heat recovery system and method with discharged smoke waste heat as heat source of air heater - Google Patents
Waste heat recovery system and method with discharged smoke waste heat as heat source of air heater Download PDFInfo
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- CN106051805A CN106051805A CN201610474366.1A CN201610474366A CN106051805A CN 106051805 A CN106051805 A CN 106051805A CN 201610474366 A CN201610474366 A CN 201610474366A CN 106051805 A CN106051805 A CN 106051805A
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- air heater
- heat
- steam air
- heater
- low
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
- F23J2900/15081—Reheating of flue gases
Abstract
The invention discloses a waste heat recovery system and method with discharged smoke waste heat as a heat source of an air heater. According to the waste heat recovery system and method with the discharged smoke waste heat as the heat source of the air heater, a low-temperature economizer and the air heater are connected through a pipeline to form a first circulation loop, a circulating pump is arranged on an inlet pipeline of the low-temperature economizer, and an air heater intake water regulating valve is arranged on an inlet pipeline of the air heater; and the low-temperature economizer is connected with the circulating water side of a condensed water heater through a pipeline to form a second circulation loop, the condensed water side of the condensed water heater is connected with a low-pressure heater in parallel through a pipeline, and a booster pump is arranged on a condensed water connecting pipeline between the condensed water side of the condensed water heater and the low-pressure heater. The system and method have the advantages that the air heater is reserved, low-temperature corrosion of an air preheater is relieved, the low-temperature economizer recovers discharged smoke waste heat of a boiler, and power generation coal consumption of a steam turbine is reduced; and meanwhile, the defects that since the air heater consumes low-pressure suction steam of the steam turbine, the heat consumption of the steam turbine is increased, the temperature of discharged smoke is increased, and the heat efficiency of the boiler is reduced are overcome, and the problems that a low-temperature economizer pipeline system is high in cost and operating reliability requirement are solved.
Description
Technical field
The present invention relates to relate to a kind of steam air heater heating system, be specifically related to a kind of warm using smoke discharging residual heat as station boiler
The residual neat recovering system of wind device thermal source and method, belong to coal-burning power plant's field of waste heat utilization.
Background technology
In thermal power plant, affecting in every loss of boiler efficiency, the heat loss due to exhaust gas proportion of boiler is maximum.One
In the case of as, exhaust gas temperature often increases by 10 DEG C, and heat loss due to exhaust gas increases by 0.5%～0.8%, much more corresponding consumption coals 1.2%～
2.4%.
Current China many coal-fired plant boiler exhaust gas temperatures are generally higher than design load, cause unit generation efficiency to decline,
Dust collection efficiency declines, coal consumption increases.For this overheating problem, domestic unit generally uses and installs low-level (stack-gas) economizer mode additional and return
Receive smoke discharging residual heat, and in order to realize reducing the effect of coal consumption, Qi Shui side is generally connected in the low-pressure heating of Steam Turbine Regenerative System
Device part, smoke discharging residual heat is recycled to the low adding system of steam turbine by pipe-line system, increases steam turbine acting, and then reduces gross coal consumption rate.
And for being in the thermal power plant having low temperature season area, for preventing boiler tail to be heated generation cold end corrosion, boiler
Pressure fan, primary air fan major part can improve the temperature of air preheater entrance cold air by the way of arranging steam air heater, make
Obtain cold section of wall temperature of heated surface of air preheater and be higher than flue gas acid dew point temperature, alleviate cold end corrosion.Conventional coal-fired plant boiler warms up
The thermal source of wind device is that steam turbine low-pressure draws gas, and steam air heater is a tubing heat exchanger, and the outer cold medium of pipe is air, and pipe interior-heat is situated between
Matter is steam, and in steam air heater, cold and hot medium carries out heat exchange, and by steam, heat is passed to air, reaches to improve air themperature
Purpose.Steam air heater is typically drawn a part from steam turbine and is drawn gas the thermal source as steam air heater, to steam by adding steam pipework
Vapour is always the Normal practice of fired power generating unit in industry as the thermal source of steam air heater, because technology relative maturity does not has innovation always.
Low-level (stack-gas) economizer is added to reclaim smoke discharging residual heat and to have in order to heat the mode of steam turbine condensation water in air preheater outlet
Solve the problem that current domestic boiler of power plant exhaust gas temperature is too high to effect.But, the heat reclaimed at present is general all by condensing
Water is recycled to as thermal medium that steam turbine is low adds heat regenerative system, condenses water system owing to this residual neat recovering system is incorporated to power plant steam turbine
System, system running pressure is higher, and the reliability requirement for equipment is high, and equipment operation maintenance cost is of a relatively high, simultaneously steam turbine
Room and furnace rear distant, the pipe-line system of conveying thermal medium typically has hundreds of rice, and pipeline is relatively costly.
The steam air heater thermal source arranged for alleviating air preheater cold end corrosion draws gas or auxiliary steam typically from steam turbine, logical
Often this type of steam typically has the degree of superheat of about 100 DEG C, and usual steam condensation exothermic coefficient compares superheated steam exothermic coefficient
Many higher, therefore for improving the exchange capability of heat of steam air heater, typically with desuperheating water to steam air heater steam cooling, reduce steam mistake
Temperature, makes steam close temperature close to full.The most both the quality having made steam air heater steam supply is underutilized, again because giving with condensation water
Steam air heater cooling decreases condensing water flow, reduces Turbo-generator Set effectiveness of regenerator.The setting of steam air heater simultaneously consumes again
The steam of certain flow, adds unit heat consumption rate.Although coming into operation of steam air heater alleviates the cold end corrosion of air preheater, but by
Improving in inlet temperature, air preheater heat transfer temperature difference reduces, and exhaust gas temperature rises, and boiler efficiency declines, and in turn results in the generating of full factory
Efficiency declines.
Above-mentioned low-level (stack-gas) economizer and steam air heater both seem incoherent technology and there is respective problem.First, warm
Although the setting of wind device alleviates cold end corrosion, but there is the consuming of heat source stream, exhaust gas temperature rising, heat waste etc. and ask
Topic；Secondly, low-level (stack-gas) economizer can solve the problem that exhaust gas temperature is too high, and its heat reclaimed is delivered to by thermal medium that steam turbine is low to be added
System increases steam turbine acting, but system running pressure is high, equipment dependability requires height, pipeline length, cost are high.
Therefore, how to overcome air preheater cold end corrosion, exhaust gas temperature height, steam air heater steam expends, Conventional cryogenic saves
Coal device pipeline high in cost of production defect, is those skilled in the art's technical issues that need to address.
Summary of the invention
It is an object of the invention to provide a kind of residual neat recovering system using smoke discharging residual heat as steam air heater thermal source.This system is protected
Stay steam air heater to alleviate air preheater cold end corrosion, low-level (stack-gas) economizer recovery boiler smoke discharging residual heat, reduce the excellent of steam turbine power generation coal consumption
Point；Meanwhile, overcome steam air heater expend steam turbine low-pressure draw gas increase turbine heat rate, exhaust gas temperature rise reduce boiler thermal output
Shortcoming, and, solve that low-level (stack-gas) economizer pipeline system cost is high, operational reliability requires high problem.
It is a further object of the present invention to provide a kind of method using above-mentioned residual neat recovering system to carry out waste heat recovery.
For achieving the above object, the present invention provides a kind of residual neat recovering system using smoke discharging residual heat as steam air heater thermal source,
Including low-level (stack-gas) economizer, steam air heater, condensation water heater and low-pressure heater；Described low-level (stack-gas) economizer and steam air heater pass through pipeline
Connecting and form the first closed circuit, the inlet duct of described low-level (stack-gas) economizer is provided with circulating pump, the inlet tube of described steam air heater
Road is provided with steam air heater inlet regulating valve；Described low-level (stack-gas) economizer is connected shape with the recirculated water side of condensation water heater by pipeline
Becoming the second closed circuit, the recirculated water side of described condensation water heater is provided with bypass valve；Described condensation water heater
Condense water side to be connected in parallel by pipeline with described low-pressure heater, the condensation water connecting tube between itself and described low-pressure heater
Road is provided with booster pump.
Preferably, described condensation water heater is water water-to-water heat exchanger.
For realizing above-mentioned another object, the present invention also provides for a kind of exhaust heat recovering method, uses described in any of the above-described item
Waste heat recovery is carried out using smoke discharging residual heat as the residual neat recovering system of steam air heater thermal source, including: when described steam air heater to heat
Cold air flows or temperature when changing, by regulating the aperture of described steam air heater inlet regulating valve and described circulating pump
Running frequency, makes described steam air heater outlet cigarette temperature reach design temperature.
Further, when the cold air flows that described steam air heater is to be heated increases or temperature declines, strengthen described warm
The aperture of wind device inlet regulating valve or improve the running frequency of described circulating pump.
Further, when the cold air flows that described steam air heater is to be heated reduces or temperature rises, reduce described warm
The aperture of wind device inlet regulating valve or reduce the running frequency of described circulating pump.
For realizing above-mentioned another object, the present invention also provides for another kind of exhaust heat recovering method, uses described in any of the above-described item
The residual neat recovering system using smoke discharging residual heat as steam air heater thermal source carry out waste heat recovery, including: put into operation when described steam air heater and
When demand heat changes, by regulating described steam air heater inlet regulating valve and bypass valve aperture, make described low
Temperature economizer fully recycles smoke discharging residual heat.
Further, when described steam air heater put into operation and demand heat without residue time, increase or standard-sized sheet described in steam air heater water inlet
Regulation valve and the aperture of bypass valve, the smoke discharging residual heat heat making described low-level (stack-gas) economizer reclaim is completely used for described warm braw
Device.
Further, when described steam air heater puts into operation and demand heat has residue, it is decreased or turned off the water inlet of described steam air heater
Regulation valve and the aperture of bypass valve, make described low-level (stack-gas) economizer that the fume afterheat reclaimed is passed through described condensation water heater
It is transmitted back to described low-pressure heater.
For realizing above-mentioned another object, the present invention also provides for another exhaust heat recovering method, uses described in any of the above-described item
The residual neat recovering system using smoke discharging residual heat as steam air heater thermal source carry out waste heat recovery, including: when the heat of described steam air heater
When demand or system spare heat change, by the regulation running frequency of described booster pump and opening of described bypass valve
Degree changes the heat exchange power of described condensation water heater, so that system thermal balance and the outlet cigarette temperature of described low-level (stack-gas) economizer
Reach design temperature.
Further, when the heat demand of described steam air heater becomes big or system spare heat diminishes, described by reducing
The aperture of the running frequency of booster pump and the described bypass valve of increase reduces the heat exchange power of described condensation water heater；Work as institute
State the heat demand of steam air heater to diminish or time system spare heat becomes big, by improving running frequency and the reduction of described booster pump
The aperture of described bypass valve improves the heat exchange power of described condensation water heater.
Residual neat recovering system provided by the present invention and method, by using boiler exhaust gas waste heat as steam air heater of utility boiler
The mode of thermal source, takes full advantage of tradition station boiler low-level (stack-gas) economizer and steam air heater two seems incoherent technological merit,
And overcome respective shortcoming, it is achieved having complementary advantages, wherein, the thermal source of steam air heater comes from smoke discharging residual heat, saves original steaming
The consuming of vapour, alleviates the cold end corrosion of air preheater, arranges the problem bringing exhaust gas temperature to raise by low temperature because of steam air heater simultaneously
Economizer reclaims and overcomes, and it reclaims heat and returns to again steam air heater, and the position of low-level (stack-gas) economizer and steam air heater is relatively
For close, length of pipeline is short, realizes water water heat exchange by condensation water heater, reduces recirculated water side system operating pressure, thus
Holistic cost is made to be effectively controlled.Having transformation simple, the duration is short, and system equipment centralized arrangement, beneficially later maintenance etc. are excellent
Point.
Accompanying drawing explanation
Fig. 1 is provided by the present invention to be embodied as using smoke discharging residual heat as the one of the residual neat recovering system of steam air heater thermal source
The pipeline of mode and composition schematic diagram.
In figure:
1. low-level (stack-gas) economizer 2. steam air heater 3. condensation water heater 4. circulating pump 5. steam air heater inlet regulating valve
6. bypass valve 7. low-pressure heater 8. booster pump
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawings and detailed description of the invention
The present invention is described in further detail.
Refer to that Fig. 1, Fig. 1 are the residual neat recovering system using smoke discharging residual heat as steam air heater thermal source provided by the present invention one
Plant pipeline and the composition schematic diagram of detailed description of the invention.
In a kind of specific embodiment, residual neat recovering system provided by the present invention warms up using smoke discharging residual heat as station boiler
Wind device thermal source, mainly by low-level (stack-gas) economizer 1, steam air heater 2, condensation water heater 3, circulating pump 4, steam air heater inlet regulating valve 5, side
The compositions such as road regulation valve 6, low-pressure heater 7, booster pump 8, it is possible to resolve air preheater cold end corrosion, exhaust gas temperature height, warm braw
Device steam expends, Conventional cryogenic economizer pipeline high in cost of production problem.
As it can be seen, low-level (stack-gas) economizer 1 is connected formation the first closed circuit, low-level (stack-gas) economizer 1 with steam air heater 2 by pipeline
Inlet duct be provided with circulating pump 4, circulating pump 4 is except regulating quantity of circulating water by converting operation, also main in order to overcome
The resistance of system water side, drives system thermal mediation cycle；The inlet duct of steam air heater 2 is provided with steam air heater inlet regulating valve 5；Low
Temperature economizer 1 is connected formation the second closed circuit, condensation water heater 3 with the recirculated water side of condensation water heater 3 by pipeline
Recirculated water side be provided with bypass valve 6, the first closed circuit forms internal circulation system together with the second closed circuit；Condense
The condensation water side of water heater 3 is connected in parallel by pipeline with low-pressure heater 7, the condensation water between itself and low-pressure heater 7
Connect pipeline and be provided with booster pump 8.
During work, low-level (stack-gas) economizer 1 recovery boiler smoke discharging residual heat is transported to steam air heater 2 by thermal medium system by the road,
In order to heat air preheater entrance cold wind.Specifically, in system, first thermal medium is carried out with boiler discharging flue gas at low-level (stack-gas) economizer 1
Heat exchange, reclaims smoke discharging residual heat, and the thermal medium after heat absorption is transported to steam air heater 2 through pipeline and carries out heat release, heating cold air.Warm
Thermal medium after wind device 2 heat release returns low-level (stack-gas) economizer 1 and continues heat absorption, reduces exhaust gas temperature.
Meanwhile, in the operating mode that summer and other steam air heaters 2 need not put into operation, condensation water heater 3 bypass valve can be closed
6, the fume afterheat of recovery is added heat exchanger 3 be transmitted back to that steam turbine is low adds heat regenerative system by condensing water by low-level (stack-gas) economizer 1；When once
When blower fan or pressure fan air quantity (or temperature) change, steam air heater inlet regulating valve 5, bypass valve 6 and circulating pump 4 etc. can be passed through
The quantity of circulating water of comprehensive means regulation system, meets steam air heater outlet cigarette temperature and reaches to design requirement；Become in steam air heater 2 heat demand
Change, i.e. during system spare thermal change, in order to ensure system entirety heat balance and low-level (stack-gas) economizer outlet cigarette temperature drop as little as
Cleaner unit Effec-tive Function temperature, can regulate condensation water heater 3 by regulation booster pump 8 running frequency and condense the stream of water side
Amount, and then the heat exchange power of regulation condensation water heater 3, meet low-level (stack-gas) economizer 1 and export cigarette temperature and reach design load, maintain system
Heat balance.
This system mutually regulates cooperation by each equipment under each operating mode, and no matter whether steam air heater 2 puts into operation, and low temperature saves coal
The heat that device 1 reclaims still can be fully used, and its outlet cigarette temperature i.e. cleaner unit inlet temperature is stable high at cleaner unit
In the range of effect is run, the outlet pathogenic wind-warm of steam air heater reaches design load.
Certainly, above-described embodiment is only the preferred version of the present invention, is specifically not limited thereto, on this basis can basis
It is actually needed to make having and adjusts targetedly, thus obtain different embodiments.Such as, in order to thermal medium and condensation
Water is controlled, and sets up other control valves on pipeline further, etc..Owing to mode in the cards is more, the most not
Another one illustrates.
Except above-mentioned residual neat recovering system, the present invention also provides for a kind of exhaust heat recovering method, and it uses above-mentioned remaining with smoke evacuation
Heat carries out waste heat recovery as the residual neat recovering system of steam air heater thermal source, including:
When primary air fan or pressure fan variable parameter operation, when its conveying cold air flows increases (or temperature decline), strengthen
The aperture of steam air heater inlet regulating valve 5 or the running frequency of raising circulating pump 4；Reduce when blower fan carries cold air flows (or temperature
Degree rises) time, reduce the aperture of steam air heater inlet regulating valve 5 or reduce the running frequency of circulating pump 4.Adjusted by steam air heater water inlet
The regulation of joint valve 5 aperture and circulating pump 4 running frequency meets steam air heater 4 and exports the requirement of cigarette temperature.
In the winter time steam air heater put into operation and demand heat without residue time, low-level (stack-gas) economizer 1 reclaim smoke discharging residual heat heat whole
For steam air heater 2, opening bypass valve 6, thermal medium returns low-level (stack-gas) economizer 1 after steam air heater 2 heat release and continues heat absorption；And it is right
There is remaining operating mode summer and other steam air heaters 2 heat demand, be decreased or turned off steam air heater inlet regulating valve 5 and bypass regulation
The aperture of valve 6, the fume afterheat of recovery is transmitted back to steam turbine low-pressure heater 7 by condensation water heater 3 by low-level (stack-gas) economizer 1,
Ensure the low-level (stack-gas) economizer 1 abundant recycling for smoke discharging residual heat.
Change in steam air heater 2 heat demand, during system spare thermal change, can be by regulating the running frequency of booster pump 8
Aperture with bypass valve 6 regulates the heat exchange power of condensation water heater 3, it is ensured that system thermal balance and low-level (stack-gas) economizer
Outlet cigarette temperature reaches to design requirement.
Specifically, when the heat demand of steam air heater 2 becomes big or system spare heat diminishes, by reducing booster pump 8
The aperture of running frequency and increase bypass valve 6 reduces the heat exchange power of condensation water heater 3；When the heat of steam air heater 2 needs
When changes persuing is little or system spare heat becomes big, by improving the running frequency of booster pump 8 and reducing opening of described bypass valve 6
Degree improves the heat exchange power of condensation water heater 3.
Residual neat recovering system using smoke discharging residual heat as steam air heater of utility boiler thermal source provided by the present invention and method, phase
Draw gas as the steam air heater of thermal source and heat recovery to the low-level (stack-gas) economizer of steam turbine side using steam turbine than in traditional, have following excellent
Point:
First, remain original steam air heater and alleviate air preheater cold end corrosion, the recovery boiler smoke discharging residual heat of low-level (stack-gas) economizer,
The advantage reducing steam turbine power generation coal consumption.
Secondly, overcome original steam air heater to expend draw gas increase turbine heat rate, exhaust gas temperature of steam turbine low-pressure and reduce boiler
The shortcoming of the thermal efficiency, and solve the problem that original low-level (stack-gas) economizer pipeline system cost is high, operational reliability requirement is high.
Furthermore, also there is transformation simple, the duration is short, system equipment centralized arrangement, beneficially later maintenance.
Above the residual neat recovering system using smoke discharging residual heat as steam air heater thermal source provided by the present invention and method are carried out
It is discussed in detail.Principle and the embodiment of the present invention are set forth by specific case used herein, above example
Explanation be only intended to help to understand the core concept of the present invention.It should be pointed out that, for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out some improvement and modification, these improve and repair
Decorations also fall in the protection domain of the claims in the present invention.
Claims (10)
1. one kind using smoke discharging residual heat as the residual neat recovering system of steam air heater thermal source, it is characterised in that include low-level (stack-gas) economizer
(1), steam air heater (2), condensation water heater (3) and low-pressure heater (7)；Described low-level (stack-gas) economizer (1) passes through with steam air heater (2)
Pipeline connects formation the first closed circuit, and the inlet duct of described low-level (stack-gas) economizer (1) is provided with circulating pump (4), described warm braw
The inlet duct of device (2) is provided with steam air heater inlet regulating valve (5)；Described low-level (stack-gas) economizer (1) and condensation water heater (3)
Recirculated water side connects formation the second closed circuit by pipeline, and the recirculated water side of described condensation water heater (3) is provided with bypass
Regulation valve (6)；The condensation water side of described condensation water heater (3) is connected in parallel by pipeline with described low-pressure heater (7), its
It is connected pipeline with the condensation water between described low-pressure heater (7) and is provided with booster pump (8).
Residual neat recovering system using smoke discharging residual heat as steam air heater thermal source the most according to claim 1, it is characterised in that institute
Stating condensation water heater (3) is water water-to-water heat exchanger.
3. an exhaust heat recovering method, use described in the claims 1 or 2 using smoke discharging residual heat as more than steam air heater thermal source
Heat recovery system carries out waste heat recovery, including: when described steam air heater (2) cold air flows to be heated or temperature change
Time, by regulating aperture and the running frequency of described circulating pump (4) of described steam air heater inlet regulating valve (5), make described warm braw
Device (2) outlet cigarette temperature reaches design temperature.
Exhaust heat recovering method the most according to claim 3, it is characterised in that when to be heated cold of described steam air heater (2)
When air mass flow increases or temperature declines, strengthen the aperture of described steam air heater inlet regulating valve (5) or improve described circulating pump (4)
Running frequency.
Exhaust heat recovering method the most according to claim 3, it is characterised in that when to be heated cold of described steam air heater (2)
When air mass flow reduces or temperature rises, reduce the aperture of described steam air heater inlet regulating valve (5) or reduce described circulating pump (4)
Running frequency.
6. an exhaust heat recovering method, use described in the claims 1 or 2 using smoke discharging residual heat as more than steam air heater thermal source
Heat recovery system carries out waste heat recovery, including: when described steam air heater (2) puts into operation and demand heat changes, by regulation
The aperture with bypass valve (6) of described steam air heater inlet regulating valve (5), makes described low-level (stack-gas) economizer (1) fully reclaim profit
Use smoke discharging residual heat.
Exhaust heat recovering method the most according to claim 6, it is characterised in that when described steam air heater (2) puts into operation and demand heat
When amount is without residue, increases or steam air heater inlet regulating valve (5) and the aperture of bypass valve (6) described in standard-sized sheet, make described low temperature
The smoke discharging residual heat heat that economizer (1) reclaims is completely used for described steam air heater (2).
Exhaust heat recovering method the most according to claim 6, it is characterised in that when described steam air heater (2) puts into operation and demand heat
When amount has residue, it is decreased or turned off described steam air heater inlet regulating valve (5) and the aperture of bypass valve (6), makes described low temperature
The fume afterheat reclaimed is transmitted back to described low-pressure heater (7) by described condensation water heater (3) by economizer (1).
9. an exhaust heat recovering method, use described in the claims 1 or 2 using smoke discharging residual heat as more than steam air heater thermal source
Heat recovery system carries out waste heat recovery, including: when heat demand or the system spare heat of described steam air heater (2) change
Time, the aperture of running frequency and described bypass valve (6) by regulating described booster pump (8) changes described condensation water and heats
The heat exchange power of device (3), so that the outlet cigarette temperature of system thermal balance and described low-level (stack-gas) economizer (1) reaches design temperature.
Exhaust heat recovering method the most according to claim 9, it is characterised in that when the heat demand of described steam air heater (2) becomes
Big or time system spare heat diminishes, by reducing the running frequency of described booster pump (8) and increasing described bypass valve (6)
Aperture reduce described condensation water heater (3) heat exchange power；When the heat demand of described steam air heater (2) diminish or system remain
When waste heat quantitative change is big, by improving the running frequency of described booster pump (8) and reducing the aperture raising of described bypass valve (6)
The heat exchange power of described condensation water heater (3).
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| CN201610474366.1A CN106051805B (en) | 2016-06-24 | 2016-06-24 | A kind of residual neat recovering system and method using smoke discharging residual heat as steam air heater heat source |
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| CN108800598A (en) * | 2018-06-22 | 2018-11-13 | 中国电建集团都江电力设备有限公司 | Flue gas heat recovery combines the wide load adjustment method of the double bypasses of steam air heater |
| CN110043918A (en) * | 2019-04-18 | 2019-07-23 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | A kind of adjacent stove heating activation system with steam air heater |
| CN110594769A (en) * | 2019-10-16 | 2019-12-20 | 福建龙净环保股份有限公司 | Flue gas treatment system |
| CN113237075A (en) * | 2021-04-30 | 2021-08-10 | 西安交通大学 | Design optimization and regulation and control method of flue gas waste heat recovery system |
| CN113310042A (en) * | 2021-05-21 | 2021-08-27 | 华能国际电力股份有限公司大连电厂 | Low-temperature coal-saving self-adjusting system for thermal power plant |
| CN113522002A (en) * | 2021-07-30 | 2021-10-22 | 西安热工研究院有限公司 | High-efficient desulfurization absorption tower of recoverable flue gas waste heat |
| CN114459016A (en) * | 2022-02-25 | 2022-05-10 | 西安西热锅炉环保工程有限公司 | Low-temperature economizer combined air heater all-condition adjusting system and method |
| CN114526495A (en) * | 2022-02-25 | 2022-05-24 | 西安西热锅炉环保工程有限公司 | Variable heat source air heater system and control method thereof |
| CN114993091A (en) * | 2022-05-18 | 2022-09-02 | 北京航化节能环保技术有限公司 | Zero-power-consumption self-adaptive distributed waste heat recycling system of ethylene device |
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| CN110594769A (en) * | 2019-10-16 | 2019-12-20 | 福建龙净环保股份有限公司 | Flue gas treatment system |
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| CN114526495A (en) * | 2022-02-25 | 2022-05-24 | 西安西热锅炉环保工程有限公司 | Variable heat source air heater system and control method thereof |
| CN114993091A (en) * | 2022-05-18 | 2022-09-02 | 北京航化节能环保技术有限公司 | Zero-power-consumption self-adaptive distributed waste heat recycling system of ethylene device |
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