CN106090985A - A kind of heat the method that NOx water filling improves combined-cycle power plant performance - Google Patents
A kind of heat the method that NOx water filling improves combined-cycle power plant performance Download PDFInfo
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- CN106090985A CN106090985A CN201610418094.3A CN201610418094A CN106090985A CN 106090985 A CN106090985 A CN 106090985A CN 201610418094 A CN201610418094 A CN 201610418094A CN 106090985 A CN106090985 A CN 106090985A
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- water
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- nox
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- auxiliary equipment
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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]
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The present invention relates to a kind of method improving combined-cycle power plant's performance, particularly a kind of heating NOXWater filling improves the method for combined-cycle power plant's performance, and it is characterized by, and waste heat boiler auxiliary equipment part in typical combined cycle power plant closed cooling water system is stood alone as open cooling water system, and remaining closed cooling water system adjusts accordingly according to the circulating cooling water yield；Demineralized water is provided to carry out heat exchange, cool down auxiliary equipment thermal component as cooling water, the cooler being equipped with waste heat boiler auxiliary equipment, tentatively heated simultaneously by independent pipeline to waste heat boiler auxiliary equipment；Demineralized water leads in the chimney heater being arranged in waste heat boiler back-end ductwork the most nearby, is heated to combustion engine NO by tail flue gasXThe maximum operating temperature that water injection module allows；Final demineralisation water is delivered to combustion engine NO through pipelineXWater injection module, sprays into combustion engine combustor, participates in fuel oil burning.On the premise of meeting DS NOx Est requirement, simultaneously work as absorbing auxiliary equipment heat radiation, reducing fuel consumption and reduce the effect of heat consumption rate, thus improve the performance of fuel oil combined-cycle power plant.
Description
Technical field
The present invention relates to a kind of method improving combined-cycle power plant's performance, particularly a kind of heating NOx water filling improves connection
The method 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
With the countries and regions that liquid fuel is master such as heavy oil, combustion engine NO to be madeXDischarge meets environmental requirement, and combustion engine is commonly provided with NOX
Water injection module, participates in burning in order to demineralized water qualified for water quality to spray into combustor.In addition combined-cycle power plant is commonly provided with closing
Formula recirculating cooling water system, in order to constantly to absorb the heat radiation of auxiliary equipment, cooling auxiliary 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 filling flow process are referring to the drawings 1:
Closed-type circulating cooling water system mainly include enclosed expansion tank 1, closed cycle water pump 2, closed circulating water heat exchanger 3,
Steam turbine building auxiliary equipment 4, combustion engine room auxiliary equipment 5, waste heat boiler auxiliary equipment 6 and other auxiliary equipments 7.Closed cycle water leads to
Cross closed cycle water pump 2 through closed circulating water heat exchanger 3 cool down after, be delivered to steam turbine building auxiliary equipment through enclosed circulating water pipeline
4, combustion engine room auxiliary equipment 5, waste heat boiler auxiliary equipment 6 and other auxiliary equipments 7 etc. these auxiliary equipments are cooled down,
Gradually rise along journey closed cycle coolant-temperature gage, pressure head is gradually lowered.Closed cycle water after intensification returns through enclosed water circulating pump 2
After boosting, then through closed circulating water heat exchanger 3 by carrying out heat exchange cooling with opened water, so complete circulating cooling process.Open
Formula water is heated after intensification and is back to circulation or aerating and cooling tower dispels the heat, in heat total loss to natural environment；
Simultaneously because there is closed cycle water loss during circulating cooling, it is therefore desirable to by demineralized water pipeline to enclosed expansion tank 1
Moisturizing, and then enclosed expansion tank 1 carries out moisturizing to closed-type circulating cooling water system.
The flow process of combustion engine NOx water filling is then particularly as follows: NOx water filling (i.e. demineralized water) is delivered to combustion engine NOx through demineralized water pipeline
Water injection module 8, sprays into combustion engine combustor 9 further and participates in combustion process, finally enters waste heat boiler 10 with combustion engine flue gas, and then
Enter air.During Gai, if NOx water filling is the most heated or underheat and after spraying into combustion engine combustor, can substantially drop
Low combustion engine is exerted oneself, combustion engine efficiency and improve heat consumption rate, largely affect the overall performance of combined-cycle power plant.
Require and on the premise of power plant exerts oneself meeting NOx emission, reduce fuel consumption, reduce heat consumption rate, become combustion
The direction that the performance optimization of oil combined-cycle power plant is made great efforts.The solution meeting above-mentioned requirements carries out pre-add to NOx water filling exactly
Heat.Giving one in this area and preheat mode, i.e. increase a set of heater 11 on the basis of original, this heater draws and connects
Hot water in waste heat boiler 10, thus can extract a certain amount of feedwater in order to heat NOx water filling from waste heat boiler 10, tool
Body referring to the drawings 2, return waste heat boiler after heat NOx water filling in heater 11 from the feedwater of waste heat boiler 10 medium voltage network
10 condensate systems, continue to participate in thermodynamic cycle, heated after again flow through feed-water heater 11.
But this solution has a problem in that: need to set up a set of middle pressure to water-to-water heat exchanger and tubing, at the beginning of increase
Investment, and, heater 11, as independent equipment, needs to do a series of protective treatment, and is placed on waste heat boiler nearby
Near, the plant area being so accomplished by increasing auxiliary equipment takes up an area, and practicality and the suitability of scheme are the highest.
Summary of the invention
It is an object of the invention to according to providing a kind of practicality and suitability height, pre-add in place of the deficiencies in the prior art
Thermal effect is good, improve combustion engine exert oneself and combustion engine efficiency thus improve the heating NOx water filling of unit performance and improve combined-cycle power plant
The method of performance.
Purpose of the present invention is realized by following approach:
The method that heating NOx water filling improves combined-cycle power plant's performance, it is provided that combustion engine NOx water filling heating system and closed cycle are cold
But water system: wherein, combustion engine NOx water filling heating system, including combustion engine NOx water injection module, combustion engine combustor and waste heat boiler,
Above-mentioned three is sequentially concatenated by pipeline, and it is NOx filling pipe that demineralized water pipeline arranges 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
Auxiliary equipment, combustion engine room auxiliary equipment and waste heat boiler auxiliary equipment, demineralized water pipeline accesses enclosed expansion tank, and enclosed expands
The outfan of water tank sequentially connects closed cycle water pump, closed circulating water heat exchanger by pipeline, closed circulating water heat exchanger
Outfan is then connected respectively to described each auxiliary equipment, and the outfan of each auxiliary equipment is connected to the defeated of closed cycle water pump
Enter end；
It is characterized by, and comprises the steps:
High pressure feed pump in waste heat boiler auxiliary equipment and condensate circulating pump part are by original closed-type circulating cooling water
In system independent, become open cooling water system, the cooling water now sent by closed circulating water heat exchanger is no longer
Through high pressure feed pump and condensate circulating pump part,
The input port of the open cooling water system described in the access of NOx filling pipe, NOx water filling enters via demineralized water pipeline and opens
Formula cooling water system, and carry out heat exchange, described high pressure feed pump and condensate circulating pump part with open cooling water system
Cooled, NOx water filling is then heated by one-level；
Arranging chimney heater in the back-end ductwork of waste heat boiler, the open cooling water system in waste heat boiler auxiliary equipment leans on
Nearly waste heat boiler back-end ductwork is arranged, connects the demineralized water entrance of chimney heater nearby；The demineralized water outlet of chimney heater
With the same side that combustion engine NOx water injection module is positioned at combustion engine-waste heat boiler axis；
The output port of open cooling water system is connected to the demineralized water entrance of chimney heater by pipeline, and heats from chimney
The demineralized water outlet of device is drawn, and the pipeline drawn is connected further in combustion engine NOx water injection module；
NOx water filling after being heated by one-level enters the chimney heater being positioned in waste heat boiler, by the afterbody cigarette in waste heat boiler
Air stripping heating load so that the NOx water filling being positioned in chimney heater is by two grades of heating；
NOx water filling after two grades of heating is sent to combustion engine NOx water injection module via pipeline, sprays into combustion engine combustor further and participates in
Combustion process, finally enters waste heat boiler with combustion engine flue gas, and then enters air.
Owing to the high pressure feed pump in waste heat boiler auxiliary equipment and condensate circulating pump are independent of original enclosed
Outside recirculating cooling water system, the quantity of circulating water in the most amended closed-type circulating cooling water system will reduce, according to new
Quantity of circulating water and design current velocity closed Water System will obtain following optimization, including:
(1) closed cooling water system mother's pipe specification is reduced；(2) reduce closed-up water pump characteristics parameter, reduce enclosed water pump electrical power；
(3) reduce closed-up water heat exchanger heat exchange area, and then reduce equipment size.
By NOx filling pipe to the water yield that open cooling water system provides be combined-cycle power plant's fuel oil operating mode time needs
NOx water injection rate, the most further according to the cooling requirement of equipment in open cooling water system, adjust high pressure feed pump and solidifying
Bear water the heat exchange area of the auxiliary equipment coolers such as circulating pump.The water provided to open cooling water system by NOx filling pipe
For demineralized water, this demineralized water has cooled down each equipment (high pressure feed pump and condensate circulating pump) in open cooling water system
After become one-level and add hot water, converging together through pipeline, enter the chimney heating being arranged in waste heat boiler back-end ductwork along homonymy
In device, two grades of heating-up temperatures now are the maximum operating temperature that combustion engine NOx water injection module allows.
Thus, the present invention desirable following good effect:
1, make full use of original system equipment and carry out pipeline transformation, it is to avoid increase equipment, reduce investment cost.
2, waste heat boiler auxiliary equipment is utilized to be closer to the relation of waste heat boiler, by part in waste heat boiler auxiliary equipment
Open, become open cooling water system, chimney heater is set in the tail gas flue of waste heat boiler simultaneously, thus open type cooling
Water system, while realizing cooling down equipment, becomes the one-level heating system of NOx water filling, and chimney heater is then two grades and adds
Hot systems, two-step heating guarantees that NOx water filling can be sufficiently heated enough temperature, increases and enter combustor NOXWater filling
Sensible heat, reduces fuel oil, demineralized water consumption, reduces combined cycle heat consumption rate, improves unit performance.
3, for same combustion engine NOXWater injection module operating temperature, after demineralized water absorbs the heat radiation of waste heat boiler auxiliary equipment
Preliminary intensification, can reduce its heat absorbed from waste heat boiler tail flue gas, contribute to waste heat boiler middle pressure steam yield, enter one
Step contributes to the raising that steam turbine is exerted oneself.
4, reduce the complexity of closed cooling water system, reduce enclosed cooling water inflow, reduce closed cooling water system mother pipe
Specification, reduces tubing quantities；Reduce closed-up water pump characteristics parameter, reduce enclosed water pump electrical power；Reduce closed-up water to change
Hot device heat exchange area, and then reduce equipment size；Reduce investment of equipment.
Accompanying drawing explanation
Fig. 1 is combustion engine NOx water filling heating system described in background of invention and the system of closed-type circulating cooling water system
Schematic flow sheet；
Fig. 2 is combustion engine NOx water filling heating system improved system flow schematic diagram described in background of invention；
Fig. 3 is the system stream of combustion engine NOx water filling heating system and closed-type circulating cooling water system described in preferred embodiment
Journey schematic diagram；
Fig. 4 is that the system flow of the combustion engine NOx flood pattern that the single level carrying out contrasting with preferred embodiment heats shows
It is intended to.
Below in conjunction with embodiment, the present invention is described further.
Detailed description of the invention
Most preferred embodiment:
Referring to the drawings 3, heat NOXWater filling improves the method for combined-cycle power plant's performance, comprises the steps:
1, first, waste heat boiler auxiliary equipment part in typical combined cycle power plant closed cooling water system is stood alone as open type cold
But water system, described open cooling water system includes the auxiliary equipments such as high pressure feed pump and condensate circulating pump, if being
Having economizer circulating pump in system, the most also list in open cooling water system by this equipment, remaining closed cooling water system is according to following
Ring cooling water inflow adjusts accordingly；
2, secondly, independent pipeline provide demineralized water as cooling water to waste heat boiler auxiliary equipment, assist with waste heat boiler
The cooler that equipment is equipped with carries out heat exchange, cools down auxiliary equipment thermal component, is heated by one-level simultaneously；
3, again, demineralized water leads in the chimney heater being arranged in waste heat boiler back-end ductwork the most nearby, by afterbody cigarette
Gas post bake is to combustion engine NOXThe maximum operating temperature that water injection module allows；
4, last, demineralized water is delivered to combustion engine NO through pipelineXWater injection module, sprays into combustion engine combustor, participates in fuel combustion process.
Above-mentioned steps further particularly as follows:
1, combined-cycle power plant's main building routine is arranged, after i.e. waste heat boiler is axially disposed in combustion engine diffuser, and waste heat pot
Stove high pressure feed pump, condensate circulating pump and economizer circulating pump (if any) etc. auxiliary equipment near waste heat boiler back-end ductwork
Chimney is arranged；
2, the closed Water System of waste heat boiler auxiliary equipment part is stood alone as open cooling water system, the most former enclosed cooling water system
System no longer to high pressure feed pump, condensate circulating pump and economizer circulating pump (if any) etc. carry Cooling Water, thus enclosed is cold
But water system quantity of circulating water reduces.According to new quantity of circulating water and recommendation flow velocity, redesign closed cooling water system, including:
(1) closed cooling water system mother's pipe specification is reduced；(2) reduce closed-up water pump characteristics parameter, reduce enclosed water pump electrical power；(3)
Reduce closed-up water heat exchanger heat exchange area, and then reduce equipment size；
3, by independent pipeline to high pressure feed pump, condensate circulating pump and economizer circulating pump (if any) etc. demineralized water is provided
As cooling water, its water yield is to need NO during combined-cycle power plant's fuel oil operating modeXWater injection rate；In proportion water operation is given above-mentioned
Auxiliary equipment.Further according to the cooling requirement of above-mentioned auxiliary equipment, adjust the heat exchange area of auxiliary equipment cooler.
4, after demineralized water has cooled down the intensification of above-mentioned auxiliary equipment, converging together through pipeline, 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 that combustion engine NOx water injection module allows；
5, the outlet of chimney heater demineralized water and combustion engine NOx water injection module are positioned at combustion engine-waste heat boiler axis to the same side.Desalination
Water is delivered to combustion engine NO through pipelineXWater injection module, sprays into combustion engine combustor, participates in fuel oil burning.
Below according to application example, various schemes are carried out comparing, to embody the creativeness of the present invention further:
As a example by certain multiaxis " two drag one " combined cycle oil fired power plant, this power plant is configured with 2 set fuel engine power generation units, 2 waste heats
Boiler and 1 set steam turbine power generation unit.Use the light diesel fuel that certain low heat valve is 42000Kj/kg, light diesel fuel becomes containing sulfur
Point.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；Assuming that steam turbine vapor (steam) temperature,
The steam inlet conditions such as pressure are constant.
In scheme described in accompanying drawing 1, NOx water filling is the most heated, and water temperature is 15 DEG C.Now fuel consumption every combustion engine is
19.17kg/s, NOXWater injection rate is 20.13 kg/s, high pressure feed pump 7A, condensate circulating pump 7B enclosed cooling water demand
Amount is 23.6 kg/s, and enclosed cooling water temperature rise is about 4.5 DEG C；Every combustion engine gross output is 296.916MW, steam turbine exert oneself into
267.251MW, combined cycle net heat consumption is 6910.1kJ/kWh.
NO in scheme described in accompanying drawing 2XWater filling presses feedwater to be heated to from 15 DEG C in feed-water heater 11 in waste heat boiler
NOXWater injection module allows maximum operating temperature to be 130 DEG C.Middle pressure economizer exit is taken from middle pressure feedwater, and feed water parameter: confluent
Be 22.42 kg/s pressure 3.42MPa(a), temperature 236 DEG C, feedwater return condensate system time temperature be about 30 DEG C.Now fire
Oilconsumption every combustion engine is 18.91kg/s, and every combustion engine NOX water injection rate is 19.85 kg/s；Because closed cooling water system sets
Putting constant, enclosed cooling water demand and temperature rise are identical with shown in accompanying drawing 1；Combustion engine gross output is 296.916MW, steam turbine exert oneself into
261.691MW, combined cycle net heat consumption is 6859.9kJ/kWh.
Accompanying drawing 3 is technical scheme of the present invention, wherein, by independent pipeline to high pressure feed pump, condensation water circulation
Pump provides demineralized water as cooling water, and its total Water is to need NO during combined-cycle power plant's fuel oil operating modeXWater injection rate, is about
19.85 kg/s.Above-mentioned auxiliary equipment is given in proportion by water operation.Adjust the heat exchange area of auxiliary equipment cooler, now remove
Saline temperature rise is about 5.4 DEG C, and it is 450kW that demineralized water absorbs heat.Demineralized water has cooled down high pressure feed pump, condensate circulating pump
After heating up etc. auxiliary equipment, converging together through pipeline, the chimney heating being arranged in waste heat boiler back-end ductwork is entered along homonymy
In device, it is heated to NOXWater injection module allows maximum operating temperature 130 DEG C.Now fuel consumption every combustion engine is 18.9kg/
S, combustion engine gross output is 296.916MW, and steam turbine is exerted oneself as 262.176MW, and combined cycle net heat consumption is 6857kJ/kWh.
For embodying the NOx water filling difference without absorption high pressure feed pump 7A, condensate circulating pump 7B heat radiation, adjust desalination
Water system schematic flow sheet is as shown in Figure 4.Now closed cooling water system arranges consistent with accompanying drawing 1, accompanying drawing 2.Demineralized water is straight
Tap in the chimney heater 12 being arranged in waste heat boiler back-end ductwork, be heated to 130 DEG C by 15 DEG C.Now fuel consumption
Every combustion engine is 18.9kg/s, and combustion engine gross output is 296.916MW, and steam turbine is exerted oneself as 261.921MW, and combined cycle net heat consumption is
6859.1kJ/kWh。
To sum up the present invention is compared with prior art:
1, meet power plant exert oneself requirement in the case of, it is possible to decrease fuel oil consume 0.26kg/s, reduce demineralized water consume 0.28kg/
S, reduces heat consumption 53.1kJ/kWh, hence it is evident that improve the performance of fuel oil combined-cycle power plant.And closed cooling water system can be reduced；
2, compared with the scheme described in accompanying drawing 2, reducing heat consumption 2.9kJ/kWh, steam turbine is exerted oneself and is improved 557kW；And enclosed can be reduced
Cooling water system, it is to avoid set up a set of external middle pressure to water-to-water heat exchanger and tubing；
3 and accompanying drawing 4 described in NOXWater filling does not absorbs subsidiary engine heat sink conception and compares, and heat consumption reduces 2.1kJ/kWh, and steam turbine is exerted oneself and carried
High 255kW.It is 450kW that demineralized water absorbs heat, then dispel the heat conversion ratio 56.6% of exerting oneself.
The not described part of the present invention is same as the prior art.
Claims (1)
1. the method that heating NOx water filling improves combined-cycle power plant's performance, it is provided that combustion engine NOx water filling heating system and closed cycle
Cooling water system: wherein, combustion engine NOx water filling heating system, including combustion engine NOx water injection module, combustion engine combustor and waste heat pot
Stove, above-mentioned three is sequentially concatenated by pipeline, and it is NOx filling pipe that demineralized water pipeline arranges 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
Auxiliary equipment, combustion engine room auxiliary equipment and waste heat boiler auxiliary equipment, demineralized water pipeline accesses enclosed expansion tank, and enclosed expands
The outfan of water tank sequentially connects closed cycle water pump, closed circulating water heat exchanger by pipeline, closed circulating water heat exchanger
Outfan is then connected respectively to described each auxiliary equipment, and the outfan of each auxiliary equipment is connected to the defeated of closed cycle water pump
Enter end；
It is characterized in that, comprise the steps:
High pressure feed pump and condensate circulating pump in waste heat boiler auxiliary equipment are independent by original closed Water System,
Becoming open cooling water system, the cooling water now sent by closed circulating water heat exchanger is no longer pass through high pressure feed pump
With condensate circulating pump part,
The input port of the open cooling water system described in the access of NOx filling pipe, NOx water filling enters via demineralized water pipeline and opens
Formula cooling water system, and carry out heat exchange, described high pressure feed pump and condensate circulating pump part with open cooling water system
Cooled, NOx water filling is then heated by one-level；
Arranging chimney heater in the back-end ductwork of waste heat boiler, the open cooling water system in waste heat boiler auxiliary equipment leans on
Nearly waste heat boiler back-end ductwork is arranged, connects the demineralized water entrance of chimney heater nearby；The demineralized water outlet of chimney heater
With the same side that combustion engine NOx water injection module is positioned at combustion engine-waste heat boiler axis；
The output port of open cooling water system is connected to the demineralized water entrance of chimney heater by pipeline, and heats from chimney
The demineralized water outlet of device is drawn, and the pipeline drawn is connected further in combustion engine NOx water injection module；
NOx water filling after being heated by one-level enters the chimney heater being positioned in waste heat boiler, by the afterbody cigarette in waste heat boiler
Air stripping heating load so that the NOx water filling being positioned in chimney heater is by two grades of heating；
NOx water filling after two grades of heating is sent to combustion engine NOx water injection module via pipeline, sprays into combustion engine combustor further and participates in
Combustion process, finally enters waste heat boiler with combustion engine flue gas, and then enters air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115127297A (en) * | 2022-04-24 | 2022-09-30 | 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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| CN115127297A (en) * | 2022-04-24 | 2022-09-30 | 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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| CN106090985B (en) | 2018-06-19 |
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