CN106402928B - Coal gas electricity generation boiler oxygen-enriched combustion system - Google Patents
Coal gas electricity generation boiler oxygen-enriched combustion system Download PDFInfo
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- CN106402928B CN106402928B CN201610417767.3A CN201610417767A CN106402928B CN 106402928 B CN106402928 B CN 106402928B CN 201610417767 A CN201610417767 A CN 201610417767A CN 106402928 B CN106402928 B CN 106402928B
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- boiler
- oxygen
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- during shutdown
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/025—Regulating fuel supply conjointly with air supply using electrical or electromechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
- F23N5/006—Systems for controlling combustion using detectors sensitive to combustion gas properties the detector being sensitive to oxygen
-
- 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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses coal gas electricity generation boiler oxygen-enriched combustion systems,Including boiler urgency protection of boiler during shutdown period system,The oxygen pipeline being connected simultaneously with boiler furnace,Air pipe line,Smoke-exhaust pipeline,Gaspipe line equipped with coal gas fast cut valve,Oxygen conten analyser and air-introduced machine are successively arranged on smoke-exhaust pipeline,Pressure fan and air control valve are disposed on air pipe line,Oxygen regulating valve and oxygen fast cut valve are disposed on oxygen pipeline,The boiler urgency protection of boiler during shutdown period system simultaneously with coal gas fast cut valve,Oxygen fast cut valve,Pressure fan,Air-introduced machine and oxygen conten analyser electrical connection,The oxygen content of boiler exhaust gas in smoke-exhaust pipeline can be sent to boiler urgency protection of boiler during shutdown period system in real time by the oxygen conten analyser,When the oxygen content that boiler urgency protection of boiler during shutdown period system receives to obtain boiler exhaust gas is greater than oxygen content secure setting,Boiler urgency protection of boiler during shutdown period system, which can control, closes oxygen fast cut valve.The advantages of present invention has energy conservation and environmental protection and can improve the boiler furnace thermal efficiency.
Description
Technical field
The present invention relates to coal gas electricity generation boilers, and in particular to coal gas electricity generation boiler oxygen-enriched combustion system.
Background technique
In power plant's coal gas electricity generation boiler, used coal gas electricity generation boiler combustion system, including while and boiler at present
Air pipe line that burner hearth is connected, smoke-exhaust pipeline, the gaspipe line equipped with coal gas fast cut valve, the folding of coal gas fast cut valve is by boiler
Anxious protection of boiler during shutdown period system is controlled, and air-introduced machine is provided on smoke-exhaust pipeline, pressure fan is provided on air pipe line.It is above-mentioned
The shortcomings that coal gas electricity generation boiler combustion system is：It, will be as the air of combustion-supporting gas and as fuel in gas fired-boiler work
Coal gas be passed through boiler furnace simultaneously and burn, so that boiler is generated steam supply steam turbine generator and use, due to as combustion-supporting
Oxygen content in air only accounts for 21%, and nitrogen accounts for 79%, on the one hand, nitrogen is not involved in burning in combustion, nitrogen with
The tail gas that boiler combustion generates can take away amount of heat in boiler furnace when boiler being discharged together, reduce boiler furnace thermal effect
Rate, and in boiler furnace high-temperature region, nitrogen reacts with oxygen, can generate a large amount of oxynitrides, these nitrogen oxidations are closed
The tail gas that object is generated with boiler combustion will pollute environment when boiler being discharged together；While air-introduced machine and pressure fan are in the process of running
The nitrogen work done in air is driven, a large amount of electric energy will be wasted, enterprise is improved and produces and uses cost.
Summary of the invention
The object of the present invention is to provide a kind of energy conservation and environmental protection and coal gas electricity generation boiler that the boiler furnace thermal efficiency can be improved it is rich
Oxygen combustion system.
To achieve the above object, present invention employs following technical solutions：The coal gas electricity generation boiler oxygen-enriched combusting system
System, the oxygen pipeline being connected including boiler urgency protection of boiler during shutdown period system, simultaneously with boiler furnace, smoke-exhaust pipeline, are set air pipe line
There is the gaspipe line of coal gas fast cut valve, is disposed with oxygen conten analyser along boiler exhaust gas outgassing direction on smoke-exhaust pipeline
And air-introduced machine, it is disposed with pressure fan and air control valve along air inlet direction on air pipe line, in oxygen pipeline
On along oxygen airintake direction be disposed with oxygen regulating valve and oxygen fast cut valve, the boiler urgency protection of boiler during shutdown period system is simultaneously
It is electrically connected with coal gas fast cut valve, oxygen fast cut valve, pressure fan, air-introduced machine and oxygen conten analyser, the oxygen conten analyser energy
The oxygen content of boiler exhaust gas in smoke-exhaust pipeline is sent to boiler urgency protection of boiler during shutdown period system in real time, when boiler urgency protection of boiler during shutdown period system
When system receives the oxygen content for obtaining boiler exhaust gas greater than oxygen content secure setting, boiler urgency protection of boiler during shutdown period system can control closing
Oxygen fast cut valve.
Further, coal gas electricity generation boiler oxygen-enriched combustion system above-mentioned, wherein：When the described oxygen content secure setting
3~4%.
Further, coal gas electricity generation boiler oxygen-enriched combustion system above-mentioned, wherein：It is provided on air pipe line and boiler
The first pressure transmitter of anxious protection of boiler during shutdown period system electrical connection, first pressure transmitter can be in real time by the outlet wind pressure of pressure fan
It is sent to boiler urgency protection of boiler during shutdown period system, when the outlet wind pressure that boiler urgency protection of boiler during shutdown period system receives to obtain pressure fan is less than
When 2.5KPa, boiler urgency protection of boiler during shutdown period system, which can control, closes oxygen fast cut valve.
Further, coal gas electricity generation boiler oxygen-enriched combustion system above-mentioned, wherein：In oxygen regulating valve and oxygen fast cut valve
Between oxygen pipeline on be provided with second pressure transmitter, second pressure transmitter can be in real time by the pipeline pressure of oxygen pipeline
Power is sent to boiler urgency protection of boiler during shutdown period system, when the loine pressure that boiler urgency protection of boiler during shutdown period system receives to obtain oxygen pipeline is less than
When 0.25MPa, boiler urgency protection of boiler during shutdown period system, which can control, closes oxygen fast cut valve.
Further, coal gas electricity generation boiler oxygen-enriched combustion system above-mentioned, wherein：Oxygen hose after oxygen fast cut valve valve
Road is provided with the flowmeter being electrically connected with boiler urgency protection of boiler during shutdown period system, and flowmeter can in real time will be oxygen-enriched on oxygen pipeline
Flow is sent to boiler urgency protection of boiler during shutdown period system, when the oxygen-enriched flow that boiler urgency protection of boiler during shutdown period system receives to obtain oxygen pipeline is big
In 3500m3When/h, boiler urgency protection of boiler during shutdown period system, which can control, closes oxygen fast cut valve.
Further, coal gas electricity generation boiler oxygen-enriched combustion system above-mentioned, wherein：Oxygen hose before oxygen regulating valve valve
Road is provided with self-pressing type regulating valve, and the upstream pressure of self-pressing type regulating valve is not less than 0.7MPa, after the valve of self-pressing type regulating valve
Pressure is not less than 0.35MPa.
Further, coal gas electricity generation boiler oxygen-enriched combustion system above-mentioned, wherein：It is adjusted in self-pressing type regulating valve and oxygen
Hand stop valve is provided on oxygen pipeline between valve.
Further, coal gas electricity generation boiler oxygen-enriched combustion system above-mentioned, wherein：Oxygen pipeline and oxygen Oxygen venting processed system
System is connected.
Through the implementation of the above technical solution, the beneficial effects of the invention are as follows：（1）Extraneous wave should be discharged into originally by being utilized
The release oxygen taken, greatly reduces enterprise's production cost；And being mixed with the air after release oxygen has than normal air
Burning velocity is faster, the flame temperature that generates is higher and advantage that radianting capacity is stronger, and then substantially increases boiler furnace
Fuel is greatly saved in the thermal efficiency, while also greatly reducing the generation of oxynitrides, protects environment；（2）Utilize release oxygen
After gas, the usage amount of air is greatly reduced, to reduce air-introduced machine and pressure fan drives nitrogen to do work in the process of running, greatly
Electric energy has been saved greatly, enterprise has been reduced and produces and uses cost.
Detailed description of the invention
Fig. 1 is the operation principle schematic diagram of coal gas electricity generation boiler oxygen-enriched combustion system of the present invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
As shown in Figure 1, the coal gas electricity generation boiler oxygen-enriched combustion system, including boiler urgency protection of boiler during shutdown period system 1, simultaneously
Oxygen pipeline 3, air pipe line 4, smoke-exhaust pipeline 5, the gaspipe line 7 equipped with coal gas fast cut valve 6 being connected with boiler furnace 2,
It is disposed with oxygen conten analyser 8 and air-introduced machine 9 along flue gas outgassing direction on smoke-exhaust pipeline 5, it is suitable on air pipe line 4
Air inlet direction be disposed with pressure fan 10 and air control valve 11, along oxygen airintake direction on oxygen pipeline 3
Be disposed with oxygen regulating valve 12 and oxygen fast cut valve 13, the boiler urgency protection of boiler during shutdown period system 1 simultaneously with coal gas fast cut valve
6, oxygen fast cut valve 13, pressure fan 10, air-introduced machine 9 and oxygen conten analyser 8 are electrically connected, and the oxygen conten analyser 8 can be in real time
The oxygen content of boiler exhaust gas in smoke-exhaust pipeline 5 is sent to boiler urgency protection of boiler during shutdown period system 1 by ground, when boiler urgency protection of boiler during shutdown period system
When the oxygen content that 1 reception obtains boiler exhaust gas is greater than oxygen content secure setting, boiler urgency protection of boiler during shutdown period system 1 can control closing
Oxygen fast cut valve 13 3~4% when the described oxygen content secure setting, can better ensure that pot in the present embodiment in this way
The safe and stable operation of furnace；In the present embodiment, it is provided on air pipe line 4 and is electrically connected with boiler urgency protection of boiler during shutdown period system 1
First pressure transmitter 14, the outlet wind pressure of pressure fan 10 can be sent to boiler emergency stop in real time by first pressure transmitter 14
Furnace protects system 1, when boiler urgency protection of boiler during shutdown period system 1 receives the outlet wind pressure for obtaining pressure fan 10 less than 2.5KPa, boiler
Anxious protection of boiler during shutdown period system 1, which can control, closes oxygen fast cut valve 13, can better ensure that the safe and stable operation of boiler in this way, mention
The operation stability of high boiler；In the present embodiment, on the oxygen pipeline 3 between oxygen regulating valve 12 and oxygen fast cut valve 13
It is provided with second pressure transmitter 15, the loine pressure of oxygen pipeline 3 can be sent to pot in real time by second pressure transmitter 15
Furnace urgency protection of boiler during shutdown period system 1, when boiler urgency protection of boiler during shutdown period system 1 receives the loine pressure for obtaining oxygen pipeline 3 less than 0.25MPa
When, boiler urgency protection of boiler during shutdown period system 1, which can control, closes oxygen fast cut valve 13, can further guarantee that the safety of boiler is steady in this way
Fixed operation, further improves the operation stability of boiler；In the present embodiment, the oxygen pipeline after 13 valve of oxygen fast cut valve
It is provided with the flowmeter 16 being electrically connected with boiler urgency protection of boiler during shutdown period system 1 on 3, flowmeter 16 can in real time will be on oxygen pipeline 3
Oxygen-enriched flow be sent to boiler urgency protection of boiler during shutdown period system 1, when boiler urgency protection of boiler during shutdown period system 1 reception obtain oxygen pipeline 3
Oxygen-enriched flow is greater than 3500m3When/h, boiler urgency protection of boiler during shutdown period system 1, which can control, closes oxygen fast cut valve 13, in this way can be into one
Step ground guarantees the safe and stable operation of boiler, further improves the operation stability of boiler；In the present embodiment, in oxygen tune
It is provided with self-pressing type regulating valve 17 on oxygen pipeline 3 before section 12 valve of valve, the upstream pressure of self-pressing type regulating valve 17 is not less than
The downstream pressure of 0.7MPa, self-pressing type regulating valve 17 are not less than 0.35MPa, can further guarantee that the safety of boiler is steady in this way
Fixed operation, further improves the operation stability of boiler；In the present embodiment, in self-pressing type regulating valve 17 and oxygen regulating valve
It is provided with hand stop valve 18 on oxygen pipeline 3 between 12, can further guarantee the safe and stable operation of boiler in this way,
Further improve the operation stability of boiler；In the present embodiment, oxygen pipeline is connected with oxygen Oxygen venting system 19 processed,
The release oxygen that oxygen Oxygen venting system discharge processed can be made full use of in this way, effectively reduces enterprise's production cost；
Working principle of the present invention is as follows：
In use, the purity that oxygen Oxygen venting system 19 processed is discharged is led to up to 99.99% release oxygen through oxygen pipeline 3
Enter boiler furnace 2, while air is passed through boiler furnace 2 through air pipe line 4 using pressure fan 10, and simultaneously by coal gas through coal gas
Pipeline 7 is passed through boiler furnace 2, and oxygen, air and coal gas is made to be sufficiently mixed burning in boiler furnace 2, due to introducing release
Oxygen, on the one hand, the release oxygen that should be discharged into extraneous waste originally is utilized, greatly reduces enterprise's production cost；And
Air after being mixed with release oxygen have than ordinary air combustion speed faster, generate flame temperature is higher and radianting capacity
Stronger advantage, and then the thermal efficiency of boiler furnace is substantially increased, fuel is greatly saved, while also greatly reducing nitrogen oxidation
The generation for closing object, protects environment；On the other hand, after using release oxygen, the usage amount of air is greatly reduced, to reduce
Air-introduced machine 9 and pressure fan 10 drive nitrogen to do work in the process of running, and electric energy is greatly saved, and further reduced enterprise's production
Use cost；In boiler running process, oxygen conten analyser 8 can be in real time by the oxygen content of boiler exhaust gas in smoke-exhaust pipeline 5
It is sent to anxious protection of boiler during shutdown period system 1, when boiler urgency protection of boiler during shutdown period system 1 receives the oxygen content for obtaining boiler exhaust gas greater than 4%,
Boiler urgency protection of boiler during shutdown period system 1, which can control, closes oxygen fast cut valve 13, while first pressure transmitter 14 will can also be sent in real time
The outlet wind pressure of blower 10 is sent to boiler urgency protection of boiler during shutdown period system 1, when the reception of boiler urgency protection of boiler during shutdown period system 1 obtains pressure fan
When 10 outlet wind pressure is less than 2.5KPa, boiler urgency protection of boiler during shutdown period system 1, which can control, closes oxygen fast cut valve 13；Second pressure simultaneously
The loine pressure of oxygen pipeline 3 also can be sent to boiler urgency protection of boiler during shutdown period system 1 in real time by power transmitter 15, when boiler emergency stop
When furnace protection system 1 receives the loine pressure for obtaining oxygen pipeline 3 less than 0.25MPa, boiler urgency protection of boiler during shutdown period system 1 can be controlled
Close oxygen fast cut valve 13；The oxygen-enriched flow on oxygen pipeline 3 also can be sent to boiler emergency stop in real time by flowmeter 16 simultaneously
Furnace protects system 1, when boiler urgency protection of boiler during shutdown period system 1 receives the oxygen-enriched flow for obtaining oxygen pipeline 3 greater than 3500m3When/h, pot
Furnace urgency protection of boiler during shutdown period system 1 can control closing oxygen fast cut valve 13 and further mention to ensure that the safe and stable operation of boiler
The high operation stability of boiler.
It is an advantage of the invention that：（1）The release oxygen that should be discharged into extraneous waste originally, annual recoverable is utilized
The up to release oxygen of 3978717 m3, the annual recycling value for diffusing oxygen greatly reduce enterprise up to 1,670,000 yuan
Production cost；And be mixed with release oxygen after air have than ordinary air combustion speed faster, generate flame temperature
Higher and stronger radianting capacity advantage, and then the thermal efficiency of boiler furnace is substantially increased, due to the raising of the thermal efficiency, every year
The gas volume that up to 33864187 m3 can be saved, has saved about 3,390,000 yuan of coal gas usage charges, while also greatly reducing nitrogen
The generation of oxygen compound, protects environment；（2）After release oxygen, the usage amount of air is greatly reduced, is drawn to reduce
Blower and pressure fan drive nitrogen to do work in the process of running, and electric energy is greatly saved, and can save up to 265247.8 degree every year
Electricity saves about 16.4 ten thousand yuan of the electricity charge, greatly reduces enterprise and produces and uses cost.
Claims (1)
1. coal gas electricity generation boiler oxygen-enriched combustion system, it is characterised in that：Including boiler urgency protection of boiler during shutdown period system while and Boiler Furnace
Oxygen pipeline that thorax is connected, air pipe line, smoke-exhaust pipeline, the gaspipe line equipped with coal gas fast cut valve, it is suitable on smoke-exhaust pipeline
Boiler exhaust gas outgassing direction be disposed with oxygen conten analyser and air-introduced machine, along air inlet direction on air pipe line
It is disposed with pressure fan and air control valve, is disposed with oxygen regulating valve along oxygen airintake direction on oxygen pipeline
And oxygen fast cut valve, the boiler urgency protection of boiler during shutdown period system simultaneously with coal gas fast cut valve, oxygen fast cut valve, pressure fan, air-introduced machine
And oxygen conten analyser electrical connection, the oxygen conten analyser can in real time send the oxygen content of boiler exhaust gas in smoke-exhaust pipeline
Boiler urgency protection of boiler during shutdown period system is given, when the oxygen content that boiler urgency protection of boiler during shutdown period system receives to obtain boiler exhaust gas is pacified greater than oxygen content
When full setting value, boiler urgency protection of boiler during shutdown period system, which can control, closes oxygen fast cut valve, 3 when the described oxygen content secure setting~
4%, the first pressure transmitter being electrically connected with boiler urgency protection of boiler during shutdown period system, first pressure pick-up are provided on air pipe line
The outlet wind pressure of pressure fan can be sent to boiler urgency protection of boiler during shutdown period system in real time by device, when boiler urgency protection of boiler during shutdown period system receives
When obtaining the outlet wind pressure of pressure fan less than 2.5KPa, boiler urgency protection of boiler during shutdown period system, which can control, closes oxygen fast cut valve, in oxygen
Second pressure transmitter is provided on oxygen pipeline between gas regulating valve and oxygen fast cut valve, second pressure transmitter can be in real time
The loine pressure of oxygen pipeline is sent to boiler urgency protection of boiler during shutdown period system by ground, when boiler urgency protection of boiler during shutdown period system receives to obtain oxygen
When the loine pressure of air pipe is less than 0.25MPa, boiler urgency protection of boiler during shutdown period system, which can control, closes oxygen fast cut valve, fast in oxygen
Be provided with the flowmeter being electrically connected with boiler urgency protection of boiler during shutdown period system on oxygen pipeline after cutting valve valve, flowmeter can in real time by
Oxygen-enriched flow on oxygen pipeline is sent to boiler urgency protection of boiler during shutdown period system, when boiler urgency protection of boiler during shutdown period system receives to obtain oxygen
The oxygen-enriched flow of pipeline is greater than 3500m3When/h, boiler urgency protection of boiler during shutdown period system, which can control, closes oxygen fast cut valve, in oxygen tune
Self-pressing type regulating valve is provided on oxygen pipeline before section valve valve, the upstream pressure of self-pressing type regulating valve is not less than 0.7MPa, from
The downstream pressure of pressure type regulating valve is not less than 0.35MPa, on the oxygen pipeline between self-pressing type regulating valve and oxygen regulating valve
It is provided with hand stop valve, oxygen pipeline is connected with oxygen Oxygen venting system processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610417767.3A CN106402928B (en) | 2016-06-15 | 2016-06-15 | Coal gas electricity generation boiler oxygen-enriched combustion system |
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| CN201610417767.3A CN106402928B (en) | 2016-06-15 | 2016-06-15 | Coal gas electricity generation boiler oxygen-enriched combustion system |
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| CN106402928A CN106402928A (en) | 2017-02-15 |
| CN106402928B true CN106402928B (en) | 2018-11-30 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109681775A (en) * | 2019-01-28 | 2019-04-26 | 南京科技职业学院 | A kind of system and its technique controlling waste gas spreading |
| CN111219994A (en) * | 2019-10-31 | 2020-06-02 | 鞍钢股份有限公司 | Oxygen-enriched combustion safety protection control method for heating furnace |
| CN111121872B (en) * | 2019-12-27 | 2022-07-15 | 液化空气(中国)投资有限公司 | Device and method capable of monitoring and adjusting combustion condition in furnace in real time |
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| CN206055675U (en) * | 2016-06-15 | 2017-03-29 | 江苏永钢集团有限公司 | Coal gas electricity generation boiler oxygen-enriched combustion system |
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| JP2006504927A (en) * | 2002-10-30 | 2006-02-09 | クレブス アンド シスラー エルピー | Boiler improvements with oxygen-enriched combustion for increased efficiency and reduced emissions |
| CN203112858U (en) * | 2013-03-25 | 2013-08-07 | 华北电力大学（保定） | Bleeding oxygen reutilization device in metallurgical production |
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Effective date of registration: 20190712 Address after: 215600 Yong village, Nanfeng Town, Zhangjiagang, Jiangsu Patentee after: Lian Feng Steel (Zhangjiagang) Co., Ltd. Address before: Nanfeng town Zhangjiagang city Suzhou city Jiangsu province 215628 wing Jiangsu Yonggang Group Co Ltd Patentee before: Jiangsu Yonggang Group Co., Ltd. |