CN106090985B - A kind of method for heating NOx water fillings and improving combined-cycle power plant's performance - Google Patents
A kind of method for heating NOx water fillings and improving combined-cycle power plant's performance Download PDFInfo
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- CN106090985B CN106090985B CN201610418094.3A CN201610418094A CN106090985B CN 106090985 B CN106090985 B CN 106090985B CN 201610418094 A CN201610418094 A CN 201610418094A CN 106090985 B CN106090985 B CN 106090985B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/002—Supplying water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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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
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/07008—Injection of water into the combustion chamber
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The present invention relates to a kind of method for improving combined-cycle power plant's performance, particularly a kind of heating NOXThe method that water filling improves combined-cycle power plant's performance, is characterized by, waste heat boiler ancillary equipment part in typical combined cycle power plant closed cooling water system is stood alone as open cooling water system, remaining closed cooling water system is accordingly adjusted according to circulating cooling water；Demineralized water is provided as cooling water from independent pipeline to waste heat boiler ancillary equipment, is carried out heat exchange with the cooler that waste heat boiler ancillary equipment is equipped with, is cooled down ancillary equipment thermal component, while tentatively heated；Demineralized water further leads to nearby to be arranged in the chimney heater of waste heat boiler back-end ductwork, and combustion engine NO is heated to by tail flue gasXThe maximum operating temperature that water injection module allows；Final demineralisation water is through pipeline to combustion engine NOXWater injection module sprays into combustion engine combustion chamber, participates in fuel oil burning.Under the premise of DS NOx Est requirement is met, while play the role of absorbing ancillary equipment heat dissipation, reduce fuel consumption and reduce heat consumption rate, so as to improve the performance of fuel oil combined-cycle power plant.
Description
Technical field
The present invention relates to a kind of method for improving combined-cycle power plant's performance, particularly a kind of heating NOx water fillings improve connection
The method for closing cycle Power Plant performance.
Background technology
The fuel such as the main natural gas fuel of Gas-steam Combined Cycle power plant, light diesel fuel and heavy oil.To use light diesel fuel
Countries and regions with based on the liquid fuels such as heavy oil, will cause combustion engine NOXDischarge meets environmental requirement, and combustion engine is commonly provided with NOX
Water injection module participates in burning the demineralized water of water quality qualification is sprayed into combustion chamber.In addition combined-cycle power plant is commonly provided with closing
Formula recirculating cooling water system, constantly to absorb the heat dissipation of ancillary equipment, cooling ancillary equipment.Closed-type circulating cooling water water quality
For demineralized water.
Closed-type circulating cooling water system, DW system demineralized water system and combustion engine NOx water fillings flow are with reference to attached drawing 1：
Closed-type circulating cooling water system mainly includes enclosed expansion tank 1, closed cycle water pump 2, the heat exchange of closed cycle water
Device 3, steam turbine building ancillary equipment 4, combustion engine room ancillary equipment 5, waste heat boiler ancillary equipment 6 and other ancillary equipments 7.Closed cycle
After the cooling of closed circulating water heat exchanger 3, steam turbine building auxiliary is delivered to through enclosed circulating water pipeline by closed cycle water pump 2 for water
Equipment 4, combustion engine room ancillary equipment 5, waste heat boiler ancillary equipment 6 and other ancillary equipments 7 etc. simultaneously carry out these ancillary equipments
Cooling, along journey closed cycle coolant-temperature gage gradually rises, pressure head continuously decreases.Closed cycle water after heating is returned through closed cycle
After water pump 2 boosts, then through closed circulating water heat exchanger 3 by carrying out heat exchange cooling with opened water, circulating cooling mistake is so completed
Journey.Opened water is heated after heating and is back to circulation or aerating and cooling tower radiates, heat total loss to natural ring
In border；Simultaneously because during circulating cooling, there are closed cycle water loss, it is therefore desirable to be expanded from desalination waterpipe to enclosed
1 moisturizing of water tank, and then enclosed expansion tank 1 carries out moisturizing to closed-type circulating cooling water system.
The flow of combustion engine NOx water fillings is specially then：NOx water fillings（That is demineralized water）Through demineralized water pipeline to combustion engine NOx
Water injection module 8 further sprays into combustion engine combustion chamber 9 and participates in combustion process, is finally discharged into waste heat boiler 10 with combustion engine flue gas, and then
It is discharged into air.Should during, if NOx water fillings are not heated or underheat and after spraying into combustion engine combustion chamber, can significantly drop
Low burn machine output, combustion engine efficiency and raising heat consumption rate largely influence the overall performance of combined-cycle power plant.
Under the premise of NOx emission requirement and power plant's output is met, reduce fuel consumption, reduce heat consumption rate, become combustion
The direction that oily combined-cycle power plant's performance optimization is made great efforts.The solution for meeting above-mentioned requirements is exactly to carry out pre-add to NOx water fillings
Heat.A kind of pre-add hot mode is given in this field, i.e., increases a set of heater 11 on the basis of original, which, which draws, connects
Hot water in waste heat boiler 10 can thus extract a certain amount of feedwater to heat NOx water fillings from waste heat boiler 10, have
For body with reference to attached drawing 2, the feedwater from 10 medium voltage network of waste heat boiler returns to waste heat boiler after heating NOx water fillings in heater 11
10 condensate systems continue to participate in thermodynamic cycle, feed-water heater 11 are again flowed through after heated.
However the problem of this solution, is：Need to add it is a set of in press to water- to-water heat exchanger and pipe-line system, increase just
Investment, moreover, heater 11 is independent equipment, needs to do a series of protective treatment, and be placed outside waste heat boiler nearby
Near, the plant area for increasing ancillary equipment is so just needed to take up an area, the practicability and applicability of scheme be not high.
Invention content
A kind of practicability and applicability height, pre-add are provided it is an object of the invention to shortcoming according to prior art
Thermal effect is good, improves combustion engine contributes and combustion engine efficiency, so as to improve the heating NOx water fillings of unit performance improves combined-cycle power plant
The method of performance.
Purpose of the present invention is realized by following approach：
The method that NOx water fillings improve combined-cycle power plant's performance is heated, combustion engine NOx water fillings heating system is provided and enclosed is followed
Ring cooling water system：Wherein, combustion engine NOx water fillings heating system, including combustion engine NOx water injection modules, combustion engine combustion chamber and waste heat
Boiler, above-mentioned three are sequentially concatenated by pipeline, and it is NOx filling pipes that desalination waterpipe, which sets a two bypass conduits,
Closed-type circulating cooling water system, including enclosed expansion tank, closed cycle water pump, closed circulating water heat exchanger, vapour
Computer room ancillary equipment, combustion engine room ancillary equipment and waste heat boiler ancillary equipment, desalination waterpipe access enclosed expansion tank, enclosed
The output terminal of expansion tank sequentially connects closed cycle water pump, closed circulating water heat exchanger, the heat exchange of closed cycle water by pipeline
The output terminal of device is then connected respectively to each ancillary equipment, and the output terminal of each ancillary equipment is connected to closed cycle water pump
Input terminal；
It is characterized by, and includes the following steps：
High pressure feed pump and condensate circulating pump part in waste heat boiler ancillary equipment is cold by original closed cycle
But it is independent in water system, become open cooling water system, the cooling water sent at this time by closed circulating water heat exchanger
High pressure feed pump and condensate circulating pump part are no longer pass through,
The input port of the NOx filling pipes access open cooling water system, NOx water fillings via desalination waterpipe into
Enter open cooling water system, and heat exchange, the high pressure feed pump and condensate circulating pump are carried out with open cooling water system
Part is cooled, and NOx water fillings are then heated by level-one；
Chimney heater is set in the back-end ductwork of waste heat boiler, the open type cooling water system in waste heat boiler ancillary equipment
System connects the desalination water inlet of chimney heater nearby close to waste heat boiler back-end ductwork arrangement；The demineralized water of chimney heater
Outlet and combustion engine NOx water injection modules are located at the same side of combustion engine-waste heat boiler axis；
The output port of open cooling water system is connected to the desalination water inlet of chimney heater by pipeline, and from chimney
The desalination water out of heater is drawn, and the pipeline drawn is connected further in combustion engine NOx water injection modules；
NOx water fillings after being heated by level-one enter the chimney heater being located in waste heat boiler, by the tail in waste heat boiler
Portion's flue gas provides heat so that the NOx water fillings in chimney heater are heated by two level；
NOx water fillings after two level heating are transmitted to combustion engine NOx water injection modules via pipeline, further spray into combustion engine combustion chamber
Combustion process is participated in, is finally discharged into waste heat boiler with combustion engine flue gas, and then be discharged into air.
Since the high pressure feed pump in waste heat boiler ancillary equipment and condensate circulating pump are independent of original enclosed
Except recirculating cooling water system, therefore the quantity of circulating water in modified closed-type circulating cooling water system will be reduced, according to new
Quantity of circulating water and design current velocity closed water system will obtain following optimization, including：
（1）Reduce closed cooling water system main pipe specification；（2）Reduce enclosed pump characteristics parameter, reduce enclosed water pump electricity
Power；（3）Enclosed water- to-water heat exchanger heat exchange area is reduced, and then reduces equipment size.
By NOx filling pipes to the water that open cooling water system provides to be needed during combined-cycle power plant's fuel oil operating mode
NOx water injection rates, then further according to the cooling requirement of equipment in open cooling water system, adjustment high pressure feed pump and solidifying
Bear water the heat exchange area of the ancillary equipments cooler such as circulating pump.The water provided by NOx filling pipes to open cooling water system
For demineralized water, each equipment in the complete open cooling water system of desalination water cooling（High pressure feed pump and condensate circulating pump）
Become level-one afterwards and heat water, it is converging together through pipeline, the chimney heating for being arranged in waste heat boiler back-end ductwork is entered along homonymy
In device, maximum operating temperature of the two level heating temperature for the permission of combustion engine NOx water injection modules at this time.
The present invention can use to obtain following good effect as a result,：
1st, original system equipment is made full use of to carry out pipeline transformation, avoids increasing equipment, reduces investment cost.
2nd, the relationship of waste heat boiler is closer to using waste heat boiler ancillary equipment, by part in waste heat boiler ancillary equipment
It is open, become open cooling water system, while chimney heater is set in the tail gas flue of waste heat boiler, thus open type cools down
Water system becomes the level-one heating system of NOx water fillings while realization cools down equipment, and chimney heater then adds for two level
Hot systems, two-step heating ensure that NOx water fillings can be sufficiently heated enough temperature, increase and enter combustion chamber NOXWater filling
Sensible heat reduces fuel oil, desalination water consumption, reduces combined cycle heat consumption rate, improves unit performance.
3rd, for same combustion engine NOXWater injection module operating temperature, after demineralized water absorbs the heat dissipation of waste heat boiler ancillary equipment
Preliminary heating, can reduce its heat absorbed from waste heat boiler tail flue gas, contribute to waste heat boiler middle pressure steam yield, into one
Step contributes to the raising that steam turbine is contributed.
4th, the complexity of closed cooling water system is reduced, reduces enclosed cooling water inflow, reduces closed cooling water system main pipe
Specification reduces pipe-line system quantities；Reduce enclosed pump characteristics parameter, reduce enclosed water pump electrical power；Closed-up water is reduced to change
Hot device heat exchange area, and then reduce equipment size；Reduce investment of equipment.
Description of the drawings
Fig. 1 is combustion engine NOx water fillings heating system described in background of invention and the system of closed-type circulating cooling water system
Flow diagram；
Fig. 2 is the improved system flow schematic diagram of combustion engine NOx water filling heating systems described in background of invention；
Fig. 3 is that combustion engine NOx water fillings heating system described in preferred embodiment and closed-type circulating cooling water system are
System flow diagram；
Fig. 4 is the system stream of the combustion engine NOx flood patterns of single grade heating compared with preferred embodiment
Journey schematic diagram.
The present invention is described further with reference to embodiment.
Specific embodiment
Most preferred embodiment：
With reference to attached drawing 3, NO is heatedXThe method that water filling improves combined-cycle power plant's performance, includes the following steps：
1st, first, waste heat boiler ancillary equipment part in typical combined cycle power plant closed cooling water system is stood alone as out
Formula cooling water system, the open cooling water system include the ancillary equipments such as high pressure feed pump and condensate circulating pump, such as
There is economizer circulating pump in fruit system, then also the equipment is included in open cooling water system, remaining closed cooling water system root
It is accordingly adjusted according to circulating cooling water；
2nd, secondly, demineralized water is provided as cooling water from independent pipeline to waste heat boiler ancillary equipment, with waste heat boiler
The cooler that ancillary equipment is equipped with carries out heat exchange, cools down ancillary equipment thermal component, while heated by level-one；
3rd, again, demineralized water further leads to and is arranged in the chimney heater of waste heat boiler back-end ductwork nearby, by tail
Portion's smoke secondary is heated to combustion engine NOXThe maximum operating temperature that water injection module allows；
4th, last, demineralized water is through pipeline to combustion engine NOXWater injection module sprays into combustion engine combustion chamber, participates in fuel oil burning
Process.
Above-mentioned steps are specially further：
1st, combined-cycle power plant's main building routinely arranges that is, waste heat boiler is axially disposed in after combustion engine diffuser, remaining
Heat boiler high pressure feed pump, condensate circulating pump and economizer circulating pump（If any）Etc. ancillary equipments close to waste heat boiler tail portion
Flue stack is arranged；
2nd, the closed water system of waste heat boiler ancillary equipment part is stood alone as into open cooling water system, i.e., former enclosed cooling
Water system is no longer to high pressure feed pump, condensate circulating pump and economizer circulating pump（If any）Deng offer cooling water, so as to close
Formula cooling water system quantity of circulating water is reduced.According to new quantity of circulating water and recommend flow velocity, redesign closed cooling water system, packet
It includes：（1）Reduce closed cooling water system main pipe specification；（2）Reduce enclosed pump characteristics parameter, reduce enclosed water pump electrical power；
（3）Enclosed water- to-water heat exchanger heat exchange area is reduced, and then reduces equipment size；
3rd, from independent pipeline to high pressure feed pump, condensate circulating pump and economizer circulating pump（If any）Offers is waited to remove
Brine needs NO as cooling water, water when being combined-cycle power plant's fuel oil operating modeXWater injection rate；Water operation is given in proportion
Above-mentioned ancillary equipment.It is further required according to the cooling of above-mentioned ancillary equipment, adjusts the heat exchange area of ancillary equipment cooler.
4th, it is converging together through pipeline after the complete above-mentioned ancillary equipment heating of desalination water cooling, enter along homonymy more than being arranged in
In the chimney heater of heat boiler back-end ductwork, it is heated to the maximum operating temperature of combustion engine NOx water injection modules permission；
5th, chimney heater desalination water out and combustion engine NOx water injection modules are located at combustion engine-waste heat boiler axis to the same side.
Demineralized water is through pipeline to combustion engine NOXWater injection module sprays into combustion engine combustion chamber, participates in fuel oil burning.
Comparing is carried out to various schemes below according to application example, further to embody the creativeness of the present invention：
By taking certain multiaxis " two drag one " combined cycle oil fired power plant as an example, the power plant be configured with 2 sets of fuel engine power generation units, 2
Waste heat boiler and 1 set of steam turbine power generation unit.The light diesel fuel that certain low heat valve is 42000Kj/kg is used, contains sulphur in light diesel fuel
Ingredient.According to calculating, combustion engine smoke evacuation acid dew point is 132 DEG C, and remainder heat boiler exhaust gas temperature is 142 DEG C；It is assumed that steam turbine steam temperature
The steam inlet conditions such as degree, pressure are constant.
NOx water fillings are not heated in scheme described in attached drawing 1, and water temperature is 15 DEG C.Every combustion engine of fuel consumption is at this time
19.17kg/s, NOXWater injection rate be 20.13 kg/s, high pressure feed pump 7A, condensate circulating pump 7B enclosed cooling water demands
It measures as 23.6 kg/s, enclosed cooling water temperature rise is about 4.5 DEG C；Every combustion engine gross output is 296.916MW, and steam turbine output is
267.251MW combined cycle net heat consumption is 6910.1kJ/kWh.
NO in scheme described in attached drawing 2XWater filling in feed-water heater 11 through waste heat boiler in pressure feedwater be heated to from 15 DEG C
NOXWater injection module allows maximum operating temperature to be 130 DEG C.Middle pressure feedwater is derived from middle pressure economizer exit, and feed water parameter：Confluent
For 22.42 kg/s pressure 3.42MPa（a）, 236 DEG C of temperature, feedwater return condensate system when temperature be about 30 DEG C.It fires at this time
Every combustion engine of oilconsumption is 18.91kg/s, and every combustion engine NOX water injection rate is 19.85 kg/s；Because closed cooling water system is set
Put it is constant, enclosed cooling water demand and Wen Shengyu attached drawings 1 shown in it is identical；Combustion engine gross output is 296.916MW, and steam turbine output is
261.691MW combined cycle net heat consumption is 6859.9kJ/kWh.
Attached drawing 3 is technical solution of the present invention, wherein, it is recycled from independent pipeline to high pressure feed pump, condensation water
Pump provides demineralized water as cooling water, and total Water needs NO when being combined-cycle power plant's fuel oil operating modeXWater injection rate, about
19.85 kg/s.Give water operation to above-mentioned ancillary equipment in proportion.The heat exchange area of ancillary equipment cooler is adjusted, is removed at this time
Salt water temperature rises about 5.4 DEG C, and it is 450kW that demineralized water, which absorbs heat,.The complete high pressure feed pump of desalination water cooling, condensate circulating pump
Etc. ancillary equipments heating after, it is converging together through pipeline, along homonymy enter be arranged in waste heat boiler back-end ductwork chimney heat
In device, it is heated to NOXWater injection module allows 130 DEG C of maximum operating temperature.Every combustion engine of fuel consumption is 18.9kg/ at this time
S, combustion engine gross output are 296.916MW, and it is 262.176MW that steam turbine, which is contributed, and combined cycle net heat consumption is 6857kJ/kWh.
To embody difference of the NOx water fillings without absorbing high pressure feed pump 7A, condensate circulating pump 7B heat dissipation, desalination is adjusted
Water system flow diagram is as shown in Figure 4.Closed cooling water system setting at this time is consistent with attached drawing 1, attached drawing 2.Demineralized water is straight
It taps into and is arranged in the chimney heater 12 of waste heat boiler back-end ductwork, 130 DEG C are heated to by 15 DEG C.Fuel consumption at this time
Every combustion engine is 18.9kg/s, and combustion engine gross output is 296.916MW, and it is 261.921MW that steam turbine, which is contributed, and combined cycle net heat consumption is
6859.1kJ/kWh。
To sum up the present invention is compared with prior art：
1st, in the case where meeting power plant's output requirement, fuel consumption 0.26kg/s can be reduced, reduces desalination water consumption
0.28kg/s reduces heat consumption 53.1kJ/kWh, hence it is evident that improves the performance of fuel oil combined-cycle power plant.And enclosed cooling water can be reduced
System；
2nd, compared with the scheme described in attached drawing 2, reduce heat consumption 2.9kJ/kWh, steam turbine, which is contributed, improves 557kW；And it can reduce
Closed cooling water system avoids adding a set of external middle pressure to water- to-water heat exchanger and pipe-line system；
3rd, with attached drawing 4 described in NOXWater filling does not absorb subsidiary engine heat sink conception and compares, and heat consumption reduces 2.1kJ/kWh, and steam turbine goes out
Power improves 255kW.Demineralized water absorbs heat for 450kW, then the output that radiates conversion ratio 56.6%.
The not described part of the present invention is same as the prior art.
Claims (1)
1. heating the method that NOx water fillings improve combined-cycle power plant's performance, combustion engine NOx water fillings heating system and closed cycle are provided
Cooling water system：Wherein, combustion engine NOx water fillings heating system, including combustion engine NOx water injection modules, combustion engine combustion chamber and waste heat pot
Stove, above-mentioned three are sequentially concatenated by pipeline, and it is NOx filling pipes that desalination waterpipe, which sets a two bypass conduits,
Closed-type circulating cooling water system, including enclosed expansion tank, closed cycle water pump, closed circulating water heat exchanger, steam turbine building
Ancillary equipment, combustion engine room ancillary equipment and waste heat boiler ancillary equipment, desalination waterpipe access enclosed expansion tank, enclosed expansion
The output terminal of water tank sequentially connects closed cycle water pump, closed circulating water heat exchanger by pipeline, closed circulating water heat exchanger
Output terminal is then connected respectively to each ancillary equipment, and the output terminal of each ancillary equipment is connected to the defeated of closed cycle water pump
Enter end；
It is characterised in that it includes following steps：
High pressure feed pump and condensate circulating pump in waste heat boiler ancillary equipment is by original closed-type circulating cooling water system
It is independent, become open cooling water system, height is no longer pass through by the cooling water that closed circulating water heat exchanger is sent at this time
Middle pressure feed pump and condensate circulating pump part,
The input port of the NOx filling pipes access open cooling water system, NOx water fillings enter via desalination waterpipe opens
Formula cooling water system, and carry out heat exchange, the high pressure feed pump and condensate circulating pump part with open cooling water system
It is cooled, and NOx water fillings are then heated by level-one；
Chimney heater is set in the back-end ductwork of waste heat boiler, and the open cooling water system in waste heat boiler ancillary equipment leans on
Nearly waste heat boiler back-end ductwork arrangement connects the desalination water inlet of chimney heater nearby；The desalination water out of chimney heater
It is located at the same side of combustion engine-waste heat boiler axis with combustion engine NOx water injection modules；
The output port of open cooling water system is connected to the desalination water inlet of chimney heater by pipeline, and is heated from chimney
The desalination water out of device is drawn, and the pipeline drawn is connected further in combustion engine NOx water injection modules；
NOx water fillings after being heated by level-one enter the chimney heater being located in waste heat boiler, by the tail portion cigarette in waste heat boiler
Air lift heating load so that the NOx water fillings in chimney heater are heated by two level；
NOx water fillings after two level heating are transmitted to combustion engine NOx water injection modules via pipeline, further spray into combustion engine combustion chamber and participate in
Combustion process is finally discharged into waste heat boiler with combustion engine flue gas, and then is discharged into air.
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| CN201610418094.3A CN106090985B (en) | 2016-06-13 | 2016-06-13 | A kind of method for heating NOx water fillings and improving combined-cycle power plant's performance |
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| CN115127297B (en) * | 2022-04-24 | 2024-03-19 | 中国神华能源股份有限公司神朔铁路分公司 | Auxiliary engine cooling water system and factory building |
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| US6644011B2 (en) * | 2000-03-24 | 2003-11-11 | Cheng Power Systems, Inc. | Advanced Cheng Combined Cycle |
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