CN108278594B - The method that the overcritical lignite direct current cooker of 600MW mixes fired biomass gasification burning - Google Patents
The method that the overcritical lignite direct current cooker of 600MW mixes fired biomass gasification burning Download PDFInfo
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- CN108278594B CN108278594B CN201711416073.9A CN201711416073A CN108278594B CN 108278594 B CN108278594 B CN 108278594B CN 201711416073 A CN201711416073 A CN 201711416073A CN 108278594 B CN108278594 B CN 108278594B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
- F23C1/12—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air gaseous and pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
- F23C5/28—Disposition of burners to obtain flames in opposing directions, e.g. impacting flames
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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Abstract
A kind of method that overcritical lignite direct current cooker of 600MW mixes fired biomass gasification burning, combustion system is made of the overcritical lignite direct current cooker of two 600MW and two biomass gasifying furnaces, set five gas burners between after-flame wind combustor and third layer coal burner respectively on the rear wall of two boilers, the public a set of combustion gas main pipe of two gasification furnaces is divided into ten branches and connects respectively with ten gas burners of two boilers, air needed for fuel gas buring is connected to boiler secondary air duct, and combustion system is monitored on-line and controlled by Distributed Control System；" one-to-one " or " a pair two respectively " or " two pair one " method of operation can be chosen according to the different online loads that grid dispatching center provides, biomass gasifying furnace is set, with different running method coupled electricity-generation, to improve the economy and security reliability of unit operation according to operating condition and peak regulation mission requirements.
Description
Technical field
The present invention relates to coal-fired and gasification of biomass coupled electricity-generation technology, especially a kind of overcritical lignite direct currents of 600MW
The method of Boiler Mixed Burning biomass gasification burning.
Background technique
It is coal-fired to refer to that biomass is converted into gaseous fuel in gasification furnace with gasification of biomass coupled electricity-generation technology, it is purified
After be directly entered coal-burning boiler and coal and be mixed and burned and generate electricity.
Biomass power generation originates from 1970s, and after worldwide financial crisis, the country such as America and Europe has carried out life in succession
The exploration of substance power generation aspect.According to statistics, in the 1980s, the U.S. has 19 companies and research institution to be engaged in gasification of biomass
The research and development of technology.The research of biomass thermal-cracking gasification integration technology of the labs of Canadian 12 universities.
China's biomass power generation also has nearly 30 years history, has developed a collection of stalk direct combustion power plant in recent years, has achieved good
Good social benefit and environmental benefit.Gasification of biomass coupled electricity-generation is a kind of new technology using renewable energy, is suitble to China
The national conditions that agricultural production is had a large population and a few land, stock dispersion degree is high.The country has developed the small evaporator furnace of kinds of processes, and MW class is raw
Gasification substance electricity generation system has promoted and applied more than 20 and has covered.
It is coal-fired with gasification of biomass coupled electricity-generation in terms of, domestic at present existing Hubei Jingmen source Guo electricity Chang steam power plant 1 ×
10.8MW demonstration project (2 × 200MW coal unit) takes a gasification furnace to match two coal-burning boiler methods of operation (i.e. " one
To two " modes), it puts into operation within 2012 stable so far.
At this stage, domestic existing 10MW~20MW gasification substance furnace matching 300MW grade coal unit operation hair below
The demonstration project of electricity.Including demonstration project, domestic gasification coupling power generation combustion system refers to design abroad scheme, is
One coal-burning boiler is matched with a biomass gasifying furnace, and 4 gas burners are arranged in a biomass gasifying furnace, is arranged symmetrically
In the left and right wall two sides of coal-burning boiler, biomass gasification burning is connect with 4 gas burners respectively by main pipe.Because of coal-fired pot
Furnace installed capacity is smaller, and it is few to be passed through gas quantity, and operating normally on boiler influences smaller, which answers demonstration project is practical
With good, stable and reliable operation.
With science and technology develop by leaps and bounds and great attention of the people to ecological environment, energy resource supply structure is towards clear
Clean, intelligence and market-oriented direction are changed.New energy substitution traditional energy, non-fossil energy substitution fossil energy are in current
The mainstream that state or even world energy sources are changed.Since this century, China's economic development enters new normality, and electricity needs slows down, coal electricity
Declined year by year using hourage, (estimation unit annual is negative for operation in low- load conditions for a long time for 600MW grade coal unit
About 70%), coal-burning power plant's efficiency power generation platform has a large amount of remaining generation loads to lotus rate, provides item for biomass coupled electricity-generation
Part makes 600MW large capacity grade coal unit implement the important subject that gasification of biomass coupled electricity-generation becomes current.
Different from the following coal unit of 300MW grade, the overcritical lignite direct current cooker of 600MW mixes fired biomass gasification burning
Ratio it is higher, be affected to parameters such as set steady burning, boiler efficiency, exhaust gas temperatures.The overcritical lignite of 600MW
If direct current cooker takes a coal-burning boiler of above-mentioned 200MW coal unit demonstration project to match a biomass gasifying furnace
There are following technical problems for combustion method:
1, a biomass gasifying furnace is passed through 600MW coal-burning boiler, and biomass fermentation electricity is on the low side, is unable to satisfy 600MW etc.
The coal-fired requirement with gasification of biomass coupled electricity-generation process program under grade coal unit underload flexibility operating condition, unit coupling hair
Electricity is less economical.
2, gasification furnace installs four gas burners, and quantity is on the low side, and asymmetric with coal burner installation site, is mentioning
Under the premise of high gasification furnace design capacity, gas flow that single gas burner is passed through increases, and it is uneven to will lead to Flow Field Distribution,
It is larger that combustion effects are stablized to boiler at low load.
3, low capacity grade coal unit is smaller because load range fluctuates, and is passed through the position adjustable range of boiler flue gas not
Greatly, boiler or so wall is taken to fix the concept feasible of four gas burners；And overcritical 600MW unit is directly by grid company
Scheduling, unit load fluctuate between 30%~100%, and the position for being passed through boiler flue gas needs larger adjustment range, and use is small
The burner arrangement scheme of capacitance grade coal unit is larger to hearth combustion tissue effect.
Because there are above-mentioned technical problem, the overcritical lignite direct current cooker of 600MW such as takes 200MW coal unit demonstration project
Combustion method (coal-burning boiler match a biomass gasifying furnace) be easy to happen low load combustion tissue and be destroyed drawn game
Phenomena such as portion's overtemperature, there are security risks for operation.
Summary of the invention
The object of the present invention is to provide the sides that a kind of overcritical lignite direct current cooker of 600MW mixes fired biomass gasification burning
Method mixes burning to solve 600MW grade supercritical lignite direct current cooker using coal-burning boiler one biomass gasifying furnace of matching
Above-mentioned technical problem existing for biomass gasification burning.
The method that the overcritical lignite direct current cooker of 600MW provided by the invention mixes fired biomass gasification burning is:
1) combustion system and control system are formed first
Wherein combustion system: using the overcritical lignite direct current cooker A of two 600MW and B and two biomass gasifying furnace A and
B sets five gas burners, five fuel gas burings respectively after the boiler of the overcritical lignite direct current cooker of two 600MW on wall
Device is located between the after-flame wind combustor and third layer coal burner after boiler on wall, on absolute altitude and spacing and boiler front wall
4th layer of five coal burners are identical；The public a set of combustion gas main pipe of two biomass gasifying furnaces, is then divided into ten branches
Connect respectively with ten gas burners on wall after the boiler, each gas burner can be controlled separately and adjustable；Combustion gas
Air needed for burning is connected to the secondary air duct of the overcritical lignite direct current cooker of 600MW；
Wherein control system: Distributed Control System (DCS) is 1. set, centralized control is carried out (including to system to combustion system
Unified monitoring, control, alarm and interlock protection)；2. the emergency episode operating system independently of Distributed Control System is arranged, wrap
The tripping of biomass total raw material, the tripping of combustion gas blower and gas emergency partition and emptier are included, by being arranged on console and pot
In Distributed Control System of overall importance or part weight occurs for the chain emergency stop push button control of furnace main fuel trip (MFT) signal
(such as Distributed Control System power supply disappearance, communicating interrupt, all operationss person station loses function and important control station loses when major break down
Control and defencive function) by operator be manually operated emergency stop push button ensure system safety；
2) the overcritical lignite direct current cooker of 600MW is then carried out by the following method using above-mentioned combustion system and control system
Mix fired biomass gasification burning:
1. taking the overcritical lignite direct current of two 600MW when the online load that grid dispatching center provides is more than 600MW
Boiler two-shipper puts into operation, also two-shipper puts into operation two biomass gasifying furnaces, two biomass gasifying furnaces respectively correspond that a 600MW is super to be faced
The method of operation (i.e. " one-to-one ") of boundary's lignite direct current cooker gas supply；Its operating method is:
Start the overcritical lignite direct current cooker operation of two 600MW, two biomass of igniting starting after unit load is stablized
Two combustion gas blower A and B are respectively started in gasifier operation after two biomass gasifying furnaces are stable, then sequence opens two
The gas burner of regulating valve, the overcritical lignite direct current cooker of two 600MW before the public combustion gas main pipe of platform biomass gasifying furnace
Wall after preceding gas header pipe valve (public combustion gas main pipe communication valve is normally closed at this time), the overcritical lignite direct current cooker of two 600MW
On gas burner branch pipe, the regulating valve on Secondary Air general pipeline and branch pipe, realize that two biomass gasifying furnaces respectively correspond one
The overcritical lignite direct current cooker gas supply of platform 600MW；
2. under the conditions of meeting online load 1., can only put into operation a biomass gasifying furnace when (biomass gasifying furnace A/B
Any maintenance down), take the overcritical lignite direct current cooker two-shipper of two 600MW to put into operation, biomass gasifying furnace A/B single machine is thrown
Fortune, the operation that any in the overcritical lignite direct current cooker of two 600MW is supplied by the separate unit biomass gasifying furnace to put into operation
Mode (i.e. " a pair two respectively "), operating method is:
Gas header pipe valve before switching public combustion gas main pipe and gas burner starts two overcritical lignite of 600MW
Direct current cooker operation, igniting starting A/B biomass gasifying furnace operation after unit load is stablized, the operation of A/B biomass gasifying furnace are steady
Start combustion gas blower A/B after fixed, then the regulating valve before the sequence unlatching public combustion gas main pipe of A/B biomass gasifying furnace, Liang Tai
Gas header pipe valve, the overcritical lignite direct current pot of two 600MW before the gas burner of the overcritical lignite direct current cooker of 600MW
Gas burner branch pipe, Secondary Air general pipeline after furnace on wall and the regulating valve on branch pipe are realized by A/B separate unit biomass gasifying furnace
The corresponding overcritical lignite direct current cooker gas supply of two 600MW；
3. taking the overcritical lignite direct current of two 600MW when the online load that grid dispatching center provides is lower than 600MW
Any, boiler put into operation, two biomass gasifying furnace two-shippers put into operation, two biomass gasifying furnaces are overcritical to the 600MW to put into operation brown
The method of operation (i.e. " two pair one ") that coal direct current cooker supplies jointly；Its operating method is:
Gas header pipe valve before switching public combustion gas main pipe and gas burner starts the overcritical lignite of 600MW
Direct current cooker operation, igniting starts two biomass gasifying furnace operations, two biomass gasifying furnace operations after unit load is stablized
Two combustion gas blower A and B are respectively started after stabilization, then sequence opens the tune before the public combustion gas main pipe of two biomass gasifying furnaces
Gas header pipe valve, this 600MW before saving the gas burner of valve, the overcritical lignite direct current cooker of this 600MW is overcritical
Gas burner branch pipe, Secondary Air general pipeline after lignite direct current cooker on wall and the regulating valve on branch pipe realize two biomass
The overcritical lignite direct current cooker gas supply of the corresponding 600MW of gasification furnace；
4. in system operation, Distributed Control System is to fuel gas temperature after combustion gas blower, gas flow, secondary distinguished and admirable
Amount, boiler front water wall wall surface temperature and boiler rear water wall wall surface temperature running technology parameter are monitored on-line, with
Track on-line checking instrument real time data adjusts condensation by manipulating conduction oil-condensed water heat-exchange system pipeline flow control valve
Water flow makes fuel gas temperature after combustion gas blower be kept for 400 DEG C；Make separate unit biomass gasification furnace gas stream by regulating gas blower
Amount keeps 45800Nm3/h；Keep the burning of separate unit biomass gasification furnace gas required secondary by adjusting the valve on Secondary Air branch pipe
Wind flow keeps 0.838Nm3/kg；Such as occur burning (boiler front wall or rear water wall wall surface temperature overtemperature or local overheating) partially,
It is then manually operated by operations staff, using the left and right wall of boiler as basis of reference, according to positional symmetry and the direction principle of correspondence, is passed through
The flow for adjusting the input quantity of gas burner, combustion gas and Secondary Air is corrected；
If online fire inspection detection temperature fluctuation is larger, can determine that combustion instability, by manual hand manipulation, turn down or
The combustion gas of respective side and secondary air flow at temperature fluctuation are closed in boiler furnace, burning is made to restore normal.
Beneficial effects of the present invention:
1, the present invention is formed using being matched with the overcritical lignite direct current cooker of two 600MW by two biomass gasifying furnaces
Combustion system takes " one-to-one " or " a pair two respectively " or " two according to the different online loads that grid dispatching center provides
To the one " method of operation, biomass gasifying furnace is enable to be carried out according to operating condition and peak regulation mission requirements with different running method
Coupled electricity-generation, biomass coupled electricity-generation realize that maximum output, the economy of unit operation greatly improve.It solves described with one
The overcritical lignite direct current cooker of 600MW matched with a biomass gasifying furnace burnt existing for less economical technology ask
Topic.
2, of the invention by the way that wall paper is set after boiler and one-to-one five combustion gas of the 4th layer of coal burner of front wall are fired
Burner, the combustion gas and pulverized coal flow that can be sparged into boiler form the complementation that preferably liquidates, and jet flow field is uniform, and burning is abundant, stablizes.
It solves the gasification furnace that matched with the overcritical lignite direct current cooker of a 600MW with a biomass gasifying furnace and four combustions is installed
Air burner it is existing because the gas flow that single gas burner is passed through make more greatly Flow Field Distribution it is uneven, to boiler at low load
Stablize the larger technical problem of combustion effects.
3, the present invention arranges five gas burners on the rear wall of 600MW super critical boiler, and combustion gas is made to spray into position tune
Adjusting range becomes larger.Solve the overcritical lignite direct current cooker of a 600MW matched with a biomass gasifying furnace, boiler it is left
It is existing because boiler flue gas position adjustable range is small to hearth combustion tissue effect that right wall fixes four gas burners
Larger technical problem.
4, the present invention breaches original low capacity biomass gasifying furnace matching low parameter coal-burning boiler (such as aforementioned 200MW shows
Model engineering) coupled electricity-generation system design limitation and deficiency, mix fired biomass for the overcritical lignite direct current cooker of 600MW large capacity
Gasification burning provides good economy performance, safe and reliable technological approaches.
Detailed description of the invention
Fig. 1 is combustion system structural schematic diagram of the invention；
Fig. 2 is the overcritical lignite direct current cooker arrangement schematic diagram of 600MW in Fig. 1；
Fig. 3 is Fig. 2 boiler rear wall firing device arrangement schematic diagram；
Fig. 4 is the secondary air duct arrangement schematic diagram of gas burner in Fig. 1；
Fig. 5 is the direct boiler coupled electricity-generation flame temperature field figure of the overcritical lignite of 600MW.
Symbol description in figure: 1- biomass gasifying furnace A, 2- biomass gasifying furnace B, 3- combustion gas main pipe, 4-600MW are overcritical
The secondary air duct of lignite direct current cooker B, the overcritical overcritical lignite direct current cooker of lignite direct current cooker B, 6-600MW of 5-600MW
The secondary air duct of the overcritical lignite direct current cooker A of A, 7-600MW, 8- boiler front wall, 9- coal burner, 10- gas burner,
11- after-flame wind combustor, wall after 12- boiler.
Specific embodiment
Below in conjunction with drawings and examples, the present invention will be further described.
In conjunction with Fig. 1 to Fig. 4, combustion system of the invention includes the overcritical lignite direct current cooker A6 and B5 of two 600MW, two
Platform biomass gasifying furnace A1 and B2 set five combustions respectively after the boiler of the overcritical lignite direct current cooker of two 600MW on wall 12
Air burner 10, five gas burners be located at after-flame wind combustor 11 after boiler on wall and third layer coal burner 9 it
Between, absolute altitude and spacing are identical as the 4th layer on boiler front wall 8 of five coal burners；Two biomass gasifying furnaces public one
Combustion gas main pipe 3 is covered, ten branches is then divided into and connects respectively with ten gas burners on wall after the boiler, each combustion gas
Burner can be controlled separately and adjustable；Air needed for fuel gas buring is connected to the secondary of the overcritical lignite direct current cooker A and B of 600MW
Air duct 4 and 7.
Control system (not shown) of the invention includes Distributed Control System (DCS) and independently of the tight of Distributed Control System
Urgent thing event operating system.Distributed Control System to combustion system carry out centralized control (including to system unified monitoring, control,
Alarm and interlock protection)；Emergency episode operating system include biomass total raw material tripping, combustion gas blower tripping and gas emergency every
Disconnected and emptier, by being arranged on console, with the chain emergency stop push button control of boiler main fuel trip (MFT) signal
System, when of overall importance or local significant trouble occurs for Distributed Control System (such as the disappearance of Distributed Control System power supply, communicating interrupt,
All operationss person station loses function and important control station is out of hand and defencive function) it is stopped in emergency by operator's manual operation
Button ensures system safety.
With the overcritical lignite direct current cooker of 600MW using above-mentioned combustion system and control system mix burning corn stover/briquetting/
For the online load that particle, grid dispatching center provide is 800MW, take the overcritical lignite direct current cooker of two 600MW double
Machine puts into operation the method for operation (i.e. " one-to-one " method of operation) to put into operation with two biomass gasifying furnace two-shippers；System operation
In, fuel gas temperature is kept for 400 DEG C after automatically adjusting combustion gas blower by DCS Distributed Control System；The combustion of separate unit biomass gasifying furnace
Throughput keeps 45800Nm3/h；Secondary air flow needed for separate unit biomass gasification furnace gas burns keeps 0.838Nm3/kg.It should
Coupled electricity-generation system coal-burning boiler flame temperature field figure is as shown in figure 5, gas burner absolute altitude is located at wall coal dust firing after boiler
Between device and after-flame wind combustor, it is in furnace flame immediate vicinity；Under different load operating condition, fuel gas flow is formed directly into fire
Flame center, the after-flame that catches fire rapidly concentrate on high-temperature area under burnout degree on gas burner；It is passed through after combustion gas to master
The Influence of Temperature Field fired in area is smaller, and Flow Field Distribution is symmetrical.Thus it proves, the overcritical lignite direct current of 600MW proposed by the present invention
The method and technology concept feasible of Boiler Mixed Burning biomass gasification burning, actual motion work well.
Claims (1)
1. a kind of method that overcritical lignite direct current cooker of 600MW mixes fired biomass gasification burning, it is characterised in that:
1) combustion system and control system are formed first
Wherein combustion system: the overcritical lignite direct current cooker A and B of two 600MW (6,5) He Liangtai biomass gasifying furnace A is used
With B (1,2), five gas burners are set on wall (12) respectively after the boiler of the overcritical lignite direct current cooker of two 600MW
(10), five gas burners are located between the after-flame wind combustor (11) and third layer coal burner (9) after boiler on wall,
Its absolute altitude and spacing are identical as the 4th layer on boiler front wall (8) of five coal burners；Two biomass gasifying furnaces public one
It covers combustion gas main pipe (3), is then divided into ten branches and connects respectively with ten gas burners on wall after the boiler, each combustion
Air burner can be controlled separately and adjustable；Air needed for fuel gas buring is connected to the Secondary Air of the overcritical lignite direct current cooker of 600MW
Road (4,7)；
Wherein control system: 1. Distributed Control System is set centralized control is carried out to combustion system；2. being arranged independently of collecting and distributing control
The emergency episode operating system of system processed, including the tripping of biomass total raw material, the tripping of combustion gas blower and gas emergency partition and row
Empty device is controlled by being arranged on console, with the chain emergency stop push button of boiler main fuel trip signal, in collecting and distributing control
Emergency stop push button, which is manually operated, by operator when of overall importance or local significant trouble occurs for system ensures system safety；
2) then carrying out the overcritical lignite direct current cooker of 600MW by the following method using above-mentioned combustion system and control system mixes burning
Biomass gasification burning:
1. taking the overcritical lignite direct current cooker of two 600MW when the online load that grid dispatching center provides is more than 600MW
Two-shipper puts into operation, that also two-shipper puts into operation two biomass gasifying furnaces, two biomass gasifying furnaces respectively correspond a 600MW is overcritical brown
The method of operation of coal direct current cooker gas supply；Its operating method is:
Start the overcritical lignite direct current cooker operation of two 600MW, two gasification of biomass of igniting starting after unit load is stablized
Furnace operation, is respectively started two combustion gas blower A and B after two biomass gasifying furnaces are stable, then sequence opens two lifes
Regulating valve before the public combustion gas main pipe of gasification substance furnace, before the gas burner of the overcritical lignite direct current cooker of two 600MW
Gas burner branch pipe, Secondary Air general pipeline and branch after gas header pipe valve, the overcritical lignite direct current cooker of two 600MW on wall
Regulating valve on pipe realizes that two biomass gasifying furnaces respectively correspond the overcritical lignite direct current cooker gas supply of a 600MW；
2. under the conditions of meeting online load 1., can only put into operation a biomass gasifying furnace when, take two 600MW overcritical
Lignite direct current cooker two-shipper puts into operation, biomass gasifying furnace A/B single machine puts into operation, by the separate unit biomass gasifying furnace that puts into operation to two
The method of operation of any gas supply in the overcritical lignite direct current cooker of 600MW, operating method is:
Gas header pipe valve before switching public combustion gas main pipe and gas burner starts the overcritical lignite direct current of two 600MW
Boiler operatiopn, igniting starting A/B biomass gasifying furnace operation after unit load is stablized, after A/B biomass gasifying furnace is stable
Start combustion gas blower A/B, then the regulating valve before the sequence unlatching public combustion gas main pipe of A/B biomass gasifying furnace, two 600MW are super
Wall after gas header pipe valve, the overcritical lignite direct current cooker of two 600MW before the gas burner of critical lignite direct current cooker
On gas burner branch pipe, the regulating valve on Secondary Air general pipeline and branch pipe, realize by A/B separate unit biomass gasifying furnace corresponding two
The overcritical lignite direct current cooker gas supply of platform 600MW；
3. taking the overcritical lignite direct current cooker of two 600MW when the online load that grid dispatching center provides is lower than 600MW
Any put into operation, two biomass gasifying furnace two-shippers put into operation, two biomass gasifying furnaces are straight to the overcritical lignite of the 600MW to put into operation
The method of operation that stream boiler supplies jointly；Its operating method is:
Gas header pipe valve before switching public combustion gas main pipe and gas burner starts the overcritical lignite direct current of a 600MW
Boiler operatiopn, igniting starts two biomass gasifying furnace operations after unit load is stablized, and two biomass gasifying furnaces are stable
After two combustion gas blower A and B are respectively started, then sequence open the public combustion gas main pipe of two biomass gasifying furnaces before adjusting
Gas header pipe valve, this 600MW before the gas burner of the overcritical lignite direct current cooker of valve, this 600MW is overcritical brown
Gas burner branch pipe, Secondary Air general pipeline after coal direct current cooker on wall and the regulating valve on branch pipe realize two biogas
Change the overcritical lignite direct current cooker gas supply of the corresponding 600MW of furnace；
4. in system operation, Distributed Control System is to fuel gas temperature, gas flow, secondary air flow, pot after combustion gas blower
Furnace front water wall wall surface temperature and boiler rear water wall wall surface temperature running technology parameter are monitored on-line, and tracking is online
Instrument real time data is detected, by manipulating conduction oil-condensed water heat-exchange system pipeline flow control valve, adjusts condensing water flow
Fuel gas temperature after combustion gas blower is set to be kept for 400 DEG C；Separate unit biomass gasification furnace gas flow is kept by regulating gas blower
45800Nm3/h；Make the required secondary air flow of separate unit biomass gasification furnace gas burning by adjusting the valve on Secondary Air branch pipe
Keep 0.838Nm3/kg；Such as occur burning partially, is then manually operated by operations staff, using the left and right wall of boiler as basis of reference, according to
Positional symmetry and the direction principle of correspondence, the flow by adjusting the input quantity of gas burner, combustion gas and Secondary Air are entangled
Just；
If online fire inspection detection temperature fluctuation is larger, it can determine that combustion instability, by manual hand manipulation, turn down or close
The combustion gas of respective side and secondary air flow at temperature fluctuation in boiler furnace make burning restore normal.
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