CN108659887A - A kind of system and method for the low-quality coal plasma gasification combustion gas of blended burning of coal fired boiler - Google Patents
A kind of system and method for the low-quality coal plasma gasification combustion gas of blended burning of coal fired boiler Download PDFInfo
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- CN108659887A CN108659887A CN201810596817.8A CN201810596817A CN108659887A CN 108659887 A CN108659887 A CN 108659887A CN 201810596817 A CN201810596817 A CN 201810596817A CN 108659887 A CN108659887 A CN 108659887A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/723—Controlling or regulating the gasification process
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0956—Air or oxygen enriched air
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0959—Oxygen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
- C10J2300/0976—Water as steam
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/12—Heating the gasifier
- C10J2300/123—Heating the gasifier by electromagnetic waves, e.g. microwaves
- C10J2300/1238—Heating the gasifier by electromagnetic waves, e.g. microwaves by plasma
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
- C10J2300/1606—Combustion processes
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
本发明公开了一种燃煤锅炉掺烧低品质煤等离子气化燃气的系统，气动上料装置入口为低品质煤输入口，出口与等离子气化反应炉上部连，等离子气化反应炉上部与气源、布袋除尘器气体入口连，布袋除尘器气体出口与储气柜入口连，布袋除尘器积灰出口接至气动上料装置入口，等离子气化反应炉下部出口为熔渣排出口，储气柜出口、二次风源接至二次风箱；中部筒体上均布多个水蒸气入口和多个等离子点火炬。本发明还公开了一种燃煤锅炉掺烧低品质煤等离子气化燃气的方法。本发明的有益效果：充分利用低品质煤及气化燃气燃烧性能，提高锅炉热效率与负荷调整能力，气化后的可燃气体更为洁净，降低燃煤锅炉下游环保设施运行能耗。
The invention discloses a system for burning low-quality coal plasma gasification gas in a coal-fired boiler. The gas source is connected to the gas inlet of the bag filter, the gas outlet of the bag filter is connected to the inlet of the gas storage cabinet, the dust accumulation outlet of the bag filter is connected to the inlet of the pneumatic feeding device, and the outlet of the lower part of the plasma gasification reactor is the slag outlet, and the storage The outlet of the gas cabinet and the secondary air source are connected to the secondary air box; multiple water vapor inlets and multiple plasma ignition torches are evenly distributed on the middle cylinder. The invention also discloses a method for burning low-quality coal plasma gasification gas in a coal-fired boiler. Beneficial effects of the present invention: make full use of the combustion performance of low-quality coal and gasified gas, improve boiler thermal efficiency and load adjustment capability, make the gasified combustible gas cleaner, and reduce the energy consumption of environmental protection facilities downstream of the coal-fired boiler.
Description
Technical field
The present invention relates to coal technical field of power generation, in particular to low-quality coal of a kind of blended burning of coal fired boiler etc. from
The system and method for sub- gasification burning.
Background technology
Supply of electric power is the important leverage of national security and people's lives production, according to the primary of China's few gas rich in coal and poor in oil
Energy resource structure so that coal occupies main positions in energy-consuming, also determines that China's power industry is considerably long from now on
It will be based on thermal power generation in time.Large coal-fired boiler uses the high-quality thermal coals such as bituminous coal, anthracite mostly at present, and
Although the waste reserves generated in the coal productions such as the low-quality coal resources of such as lignite or gangue, coal slime processing are considerable,
The 45.68% of the total coal resources reserves in China is accounted for, but due to the impurity contents such as its mineral, moisture, sulphur content height, leads to calorific value
It is low, it is larger using difficulty directly as coal-burning boiler raw material.The utilization side of being mainly the following of current low-quality coal resources
Formula：
1, lignite is the minimum pit coal of degree of coalification, has the characteristics that high volatile, high ash content, ash fusion point are low, in sky
It is easy weathering in gas, be not easy to store and transports, when burning is serious to air pollution.
Current main Land use systems can be mixed separately as coal-fired boiler fuel, or as auxiliary fuel and bituminous coal
It burns, to save power coal resource, reduces cost of electricity-generating, but due to lignite high-moisture, the characteristic of low heat value, directly enter stove combustion
Burning or mix the mode of burning can lead to problems such as the drying of coal dust and powder manufacturing apparatus block, wear, and influence boiler combustion is steady after entering stove
It is qualitative, situations such as also resulting in heating surface coking, equipment attrition, influence the safe operation of boiler；
Or dehydration upgrading is carried out using heat sources such as steam, flue gases, it is recycled after reducing brown moisture in coal, but this work
Skill changes the chemical constitution of lignite due to not having, and dewatered lignite easily relapses moisture during transport and use, no
Easily outward transport and storage, application range is relatively narrow.
Alternatively, it is also possible to which using the method for pyrolysis upgrading, i.e., heating makes lignite destructive distillation generate in the absence of air conditions
The products such as tar, coal gas and semicoke, product can be used as life fuel, smelting reducing agent, activated carbon raw material etc., this lignite pyrolysis
Process for upgrading system is relative complex, and energy consumption is larger, and volatile matter loss is bigger.
2, gangue is the waste of generation during coal mining and coal washing, has become China's yield and discharge capacity at present
One of maximum industrial solid castoff.Major part gangue is not utilized at present, is directly filled or is abandoned, causes
The significant wastage of China's land resource destroys ecological environment, and generally as the filling of mining collapse area, goaf, small part is made
Be used for circulating fluidized bed boiler fuel, for generating electricity, brickmaking, cement, agricultural application etc., the thermal efficiency is low, be applicable in the type of furnace
It is less, it is overall using horizontal very low.
3, coal slime is the by-product during coal washing, and most of coal slime uses the placement discharged and stacked on the spot, by
In its fine size, retentiveness is strong, ash content is high the features such as, the environmental issue of generation is even more serious than gangue, and small part is through overdrying
For purposes such as boiler combustion, making moulded coal, formed cokes after change, but the mode for mixing burning after desiccation as auxiliary fuel increases construction
And operating cost, economy are poor.
All in all, the low-quality coal utilization mode in China is more extensive, with directly burn, mix burning or abandon based on.It is another
Aspect, since coal resources anxiety and price are surging, power plant combustion or after mixing and burning low-quality coal, combustion stability is deteriorated, simultaneously
State Grid's structural adjustment requires the stable operation of coal burning boiler of power station underload and fast load control, and increases and use poor quality
The difficulty of stable operation of the boiler after coal, quick response.
Invention content
To solve the above problems, the purpose of the present invention is to provide a kind of low-quality coal plasma gasifications of blended burning of coal fired boiler
The system and method for combustion gas, on the one hand, low-quality coal resource can be made full use of, while being better than coal using gasification burning combustibility
The characteristics of powder, improves the coal-burning boiler thermal efficiency and load adjustment ability, on the other hand, uses the fuel gas generated after gasification more
For cleaning, coal-burning boiler downstream environmental protection facility operation energy consumption is reduced.
The present invention provides a kind of systems of the low-quality coal plasma gasification combustion gas of blended burning of coal fired boiler, including：On pneumatic
Expect device, plasma gasification reacting furnace, bag filter, gas storage holder, air or oxygen air source, the Secondary Air from air preheater heat
Source and mating connecting line；
The Pneumatic feeding device entrance is the input port of low-quality coal, Pneumatic feeding device outlet with it is described it is equal from
Sub- gasification reacting furnace top solid inlet is connected, the plasma gasification reacting furnace upper gas entrance and air or oxygen air source
It is connected, the plasma gasification reacting furnace upper gas outlet is connected with the bag filter gas access, and the cloth bag removes
Dirt device gas vent is connected with the gas storage holder entrance, and the bag filter dust stratification outlet is connected to the Pneumatic feeding device and enters
Mouthful, the plasma gasification reacting furnace lower part outlet is slag discharge port, and the gas storage holder outlet is connected to the Secondary Air on boiler
Case, secondary wind regime are connected to the secondary air box；
Wherein, the multiple vapor being evenly equipped with positioned at first level face on the plasma gasification reacting furnace middle cylinder enter
Mouthful and positioned at the second horizontal plane multiple plasma ignition torches.
As further improvement of the invention, is provided on the pipeline between the gas storage holder outlet and the secondary air box
Regulating valve.
As further improvement of the invention, it is provided with and send on the pipeline between the secondary wind regime and the secondary air box
Wind turbine.
As further improvement of the invention, the pipe between the bag filter gas vent and the gas storage holder entrance
Road is provided with combustion gas booster fan.
As further improvement of the invention, the multiple plasma ignition torch is electrically connected with plasma switch board.
As further improvement of the invention, it is provided with by CO sensors and H on the boiler2The sensing of sensor composition
Device group, the gas storage holder outlet and the secondary wind regime are connected by mixed pipe line with the sensor group.
The present invention also provides a kind of methods of the low-quality coal plasma gasification combustion gas of blended burning of coal fired boiler, including following step
Suddenly：
Step 1, low-quality coal passes through Pneumatic feeding device from described in the entrance of plasma gasification reacting furnace top solid inlet
Plasma gasification reacting furnace top enters the plasma gasification reacting furnace middle cylinder after abundant destructive distillation and prepares to gasify；
Step 2, the multiple plasma ignition torches being arranged on the plasma gasification reacting furnace middle cylinder generate high intensity
Heat source provides energy source for gasification, lights the vaporising fuel that waits in middle cylinder, and make the multiple plasma ignition
The flame of torch amplifies step by step in middle cylinder；
Step 3, anti-by the plasma gasification when plasma gasification reaction in-furnace temperature, which reaches gasification, to be required
It answers the multiple steam entries being arranged on stove middle cylinder to be passed through vapor, and air or oxygen is passed through into the plasma gasification
Reacting furnace upper gas entrance introduces the plasma gasification reacting furnace, under the high energy thermal environment that plasma-arc generates, hair
Raw following reaction：
C+H2O→CO+H2；
2C+O2→2CO；
It is H to generate containing main component2With the fuel gas of CO, inorganic matter then becomes harmless slag from the plasma (orifice) gas
Change the discharge of reacting furnace lower part outlet；
Step 4, fuel gas is completed to purify by bag filter, and dust stratification enters institute after returning to the Pneumatic feeding device
Plasma gasification reacting furnace is stated, waits for gasifying again；
Step 5, purified fuel gas enters gas storage holder by combustion gas booster fan, by regulating valve by the gas storage
Fuel gas in cabinet is sent into secondary air box, and the Secondary Air from air preheater heat is sent into the secondary air box by pressure fan
In, low concentration is mixed and is diluted to fuel gas, and the mixed gas after being diluted by Secondary Air is burnt in the boiler.
As further improvement of the invention, the multiple plasma ignition torch realizes that power supply is cut by electrical power control cabinet
It changes, protect and controls.
As further improvement of the invention, pass through the fuel gas being arranged on boiler in sensor group measurement mixed gas
Concentration, and the control valve opening is controlled, so that fuel gas ratio is maintained at low concentration.
Beneficial effects of the present invention are：
By plasma gasification technology, make low-quality coal resources Efficient Conversion under plasma activated state, is applicable in original
Expect that range is wide, gasification efficiency is high, and equipment investment cost is low, energy consumption is few, can will be difficult to the resources such as the lignite directly utilized, gangue
It is converted into the synthesis combustible gas that purity is high, clean, realizes efficient, the clean utilization of low-quality coal resource.
The mode that boiler replaces air to burn is passed through after gasification burning is diluted, solution, which is directly burnt or mixed, burns low product
Matter coal may caused by the problems such as boiler combustion condition is poor, dust deposition, while after mixing and burning fuel gas, improvement boiler combustion item
Part so that igniting, combustion stability greatly improve, and significantly improve the coal-burning boiler thermal efficiency and load adjustment ability.
Containing dedusting pretreatment unit, generating combustion gas has the advantages that purity is high, cleans, and enters stokehold removing partial contamination
Object reduces dedusting, desulfurization equipment energy consumption.
Description of the drawings
Fig. 1 is a kind of system of the low-quality coal plasma gasification combustion gas of blended burning of coal fired boiler described in the embodiment of the present invention
Schematic diagram.
In figure,
1, low-quality coal；2, Pneumatic feeding device；3, steam entry；4, plasma ignition torch；5, plasma gasification is anti-
Answer stove；6, bag filter；7, combustion gas booster fan；8, gas storage holder；9, regulating valve；10, pressure fan；11, boiler；12, secondary
Bellows；13, sensor group；14, plasma switch board.
Specific implementation mode
It is described in further detail below by specific embodiment and in conjunction with attached drawing to the present invention.
Embodiment 1, as shown in Figure 1, the low-quality coal plasma (orifice) gas of a kind of blended burning of coal fired boiler described in the embodiment of the present invention
Change the system of combustion gas, including：Pneumatic feeding device 2, plasma gasification reacting furnace 5, bag filter 6, gas storage holder 8, air or
Oxygen source, the secondary wind regime from air preheater heat and mating connecting line.
2 entrance of Pneumatic feeding device is the input port of low-quality coal 1, and the outlet of Pneumatic feeding device 2 is anti-with plasma gasification
Answer 5 top solid inlet of stove be connected, 5 upper gas entrance of plasma gasification reacting furnace is connected with air or oxygen air source, wait from
The outlet of 5 upper gas of sub- gasification reacting furnace is connected with 6 gas access of bag filter, 6 gas vent of bag filter and gas storage
8 entrance of cabinet is connected, and the outlet of 6 dust stratification of bag filter is connect with 2 entrance of Pneumatic feeding device, 5 lower part of plasma gasification reacting furnace
Outlet is slag discharge port, and gas storage holder 8 exports the secondary air box 12 being connected on boiler 11, and secondary wind regime is connected to secondary air box 12.
Wherein, multiple steam entries 3 positioned at first level face are evenly equipped on 5 middle cylinder of plasma gasification reacting furnace
With multiple plasma ignition torches 4 positioned at the second horizontal plane.
Gas storage holder 8 exports and is provided with regulating valve 9 on the pipeline between secondary air box 12, is realized to pot by regulating valve 9
The accurate transporting combustible gases of stove.When needing fuel gas, regulating valve 9 is opened, fuel gas and the heat from air preheater
Secondary Air is mixed in hot secondary air box, and fuel gas enters 11 hearth combustion of boiler with Secondary Air, under high temperature environment can be quick
It catches fire, stablize burning, while improving boiler thermal efficiency, improve in coal-burning boiler underrun or load variations and burn in stove
Condition.When not needing fuel gas or the stoppage in transit of plasma gasification reacting furnace, maintenance, regulating valve 9 is closed, and stops conveying combustible gas
Body does not influence the original air and flue system operation of coal-burning boiler.When in boiler startup or the combustion-supporting Secondary Air pipeline that needs to put into operation of underload
Before the plasma ignition torch 4 of setting, regulating valve 9 is closed, and stops transporting combustible gases, to prevent plasma gasification reacting furnace 5 from returning
Burning or explosion occur in fire or Secondary Air pipeline.
It is provided with pressure fan 10 on pipeline between secondary wind regime and secondary air box 12, is conducive to the conveying of Secondary Air, and protects
Demonstrate,prove the uniformity of Secondary Air.
It is provided with combustion gas booster fan 7 on pipeline between 8 entrance of 6 gas vent of bag filter and gas storage holder, is conducive to
Purified gas conveys, and passes through the inhomogeneities of 8 balanced gas expense of gas storage holder.
Multiple plasma ignition torches 4 are electrically connected with plasma switch board 14, realize power supply switching, protection and control, and real
Now to the control of 4 flame of plasma ignition torch.
It is provided on boiler 11 by CO sensors and H2Sensor composition sensor group 13, gas storage holder 8 outlet and it is secondary
Wind regime is connected by mixed pipe line with sensor group 13, measures gas concentration in mixed gas by sensor group, and control tune
Gasification burning ratio is maintained at low concentration by section valve opening, prevents to explode.
Embodiment 2, a kind of side of the low-quality coal plasma gasification combustion gas of blended burning of coal fired boiler described in the embodiment of the present invention
Method includes the following steps：
Step 1, low-quality coal 1 is broken for the small-sized granular coal cinder that diameter is about 1-2cm by coal pulverizer, on pneumatic
Material device 2 enters 5 top of plasma gasification reacting furnace from 5 top solid inlet of plasma gasification reacting furnace, by abundant destructive distillation
Enter 5 middle cylinder of plasma gasification reacting furnace afterwards and prepares gasification；
Step 2, the multiple plasma ignition torches 4 being arranged on 5 middle cylinder of plasma gasification reacting furnace generate high-strength hot
Source provides energy source for gasification, lights the vaporising fuel that waits in middle cylinder, and makes multiple plasma ignition torches 4
Flame amplifies step by step in middle cylinder；
Step 3, when temperature reaches gasification and requires in plasma gasification reacting furnace 5, by plasma gasification reacting furnace 5
The multiple steam entries 3 being arranged on portion's cylinder are passed through vapor, and air or oxygen is passed through on plasma gasification reacting furnace 5
Portion gas access introduces plasma gasification reacting furnace 5, and under the high energy thermal environment that plasma-arc generates, following reaction occurs：
C+H2O→CO+H2；
2C+O2→2CO；
It is H to generate containing main component2With the fuel gas of CO, it is anti-from plasma gasification that inorganic matter then becomes harmless slag
5 lower part outlet of stove is answered to be discharged；
Step 4, fuel gas by bag filter 6 complete purify, dust stratification return Pneumatic feeding device 2 after enter etc. from
Sub- gasification reacting furnace 5 waits for gasifying again；
Step 5, purified fuel gas enters gas storage holder 8 by combustion gas booster fan 7, by regulating valve 9 by gas storage
Fuel gas in cabinet 8 is sent into secondary air box 12, and the Secondary Air from air preheater heat is sent into Secondary Air by pressure fan 10
In case 12, low concentration is mixed and is diluted to fuel gas, and the mixed gas after being diluted by Secondary Air is fired in boiler 11
It burns.
Wherein, multiple plasma ignition torches 4 realize power supply switching, protection and control by electrical power control cabinet 14, and realize
Control to 4 flame of plasma ignition torch.
By the way that the combustable gas concentration in 13 measurement mixed gas of sensor group is arranged on boiler 11, and control to adjust valve 9
Aperture makes fuel gas ratio be maintained at low concentration, prevents to explode.
The present invention will be such that the low-quality coal such as lignite, gangue is crushed by preliminary, and plasma (orifice) gas is sent by charging gear
Change in reacting furnace 5, is passed through the auxiliary vapour of power plant and starts heat source as gasification furnace.Coal under the high energy thermal environment of plasma gasification furnace,
It interacts with the plasma (orifice) gas agent of addition, under plasma activated state, generation main component is H2, CO combustible gas
Body, is passed through the storage of gas storage holder 8 after the purification of bag filter 6, and gasification fuel gas is mixed with hot Secondary Air and is diluted to relatively low
Boiler is passed through after concentration, the mixed gas after being diluted by Secondary Air is passed through boiler and burns instead of air, realizes low-quality
Coal efficiently, clean utilization.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of system of the low-quality coal plasma gasification combustion gas of blended burning of coal fired boiler, which is characterized in that including：Pneumatic charging fills
It sets (2), plasma gasification reacting furnace (5), bag filter (6), gas storage holder (8), air or oxygen air source, come from air preheater heat
Secondary wind regime and mating connecting line；
Pneumatic feeding device (2) entrance is the input port of low-quality coal (1), Pneumatic feeding device (2) outlet and institute
It states plasma gasification reacting furnace (5) top solid inlet to be connected, plasma gasification reacting furnace (5) the upper gas entrance and sky
Gas or oxygen source are connected, and plasma gasification reacting furnace (5) the upper gas outlet enters with the bag filter (6) gas
Mouth is connected, and bag filter (6) gas vent is connected with the gas storage holder (8) entrance, bag filter (6) dust stratification
Outlet is connected to the Pneumatic feeding device (2) entrance, and plasma gasification reacting furnace (5) lower part outlet is slag discharge port,
Gas storage holder (8) outlet is connected to the secondary air box (12) on boiler (11), and secondary wind regime is connected to the secondary air box (12)；
Wherein, the multiple vapor being evenly equipped with positioned at first level face on plasma gasification reacting furnace (5) middle cylinder enter
Mouth (3) and multiple plasma ignition torches (4) positioned at the second horizontal plane.
2. system according to claim 1, which is characterized in that gas storage holder (8) outlet and the secondary air box (12)
Between pipeline on be provided with regulating valve (9).
3. system according to claim 1, which is characterized in that between the secondary wind regime and the secondary air box (12)
Pressure fan (10) is provided on pipeline.
4. system according to claim 1, which is characterized in that bag filter (6) gas vent and the gas storage
It is provided with combustion gas booster fan (7) on pipeline between cabinet (8) entrance.
5. system according to claim 1, which is characterized in that the multiple plasma ignition torch (4) controls with plasma
Cabinet (14) is electrically connected.
6. system according to claim 1, which is characterized in that be provided with by CO sensors and H on the boiler (11)2It passes
The sensor group (13) of sensor composition, gas storage holder (8) outlet and the secondary wind regime pass through mixed pipe line and the sensing
Device group (13) is connected.
7. a kind of method of the low-quality coal plasma gasification combustion gas of blended burning of coal fired boiler, which is characterized in that include the following steps：
Step 1, low-quality coal (1) enters by Pneumatic feeding device (2) from plasma gasification reacting furnace (5) top solid inlet
Plasma gasification reacting furnace (5) top enters plasma gasification reacting furnace (5) middle cylinder after abundant destructive distillation
Prepare gasification；
Step 2, the multiple plasma ignition torches (4) being arranged on plasma gasification reacting furnace (5) middle cylinder generate high-strength
Heat source is spent, energy source is provided for gasification, lights the vaporising fuel that waits in middle cylinder, and make the multiple plasma point
The flame of torch (4) amplifies step by step in middle cylinder；
Step 3, anti-by the plasma gasification when the interior temperature of the plasma gasification reacting furnace (5), which reaches gasification, to be required
Answer the multiple steam entries (3) being arranged on stove (5) middle cylinder to be passed through vapor, and by air or oxygen by it is described etc. from
Sub- gasification reacting furnace (5) upper gas entrance introduces the plasma gasification reacting furnace (5), in the high energy that plasma-arc generates
Under thermal environment, following reaction occurs：
C+H2O→CO+H2；
2C+O2→2CO；
It is H to generate containing main component2With the fuel gas of CO, it is anti-from the plasma gasification that inorganic matter then becomes harmless slag
Stove (5) lower part outlet is answered to be discharged；
Step 4, fuel gas is completed to purify by bag filter (6), after dust stratification returns to (2) described in the Pneumatic feeding device
Into plasma gasification reacting furnace (5), wait for gasifying again；
Step 5, purified fuel gas enters gas storage holder (8) by combustion gas booster fan (7), by regulating valve (9) by institute
The fuel gas stated in gas storage holder (8) is sent into secondary air box (12), and the Secondary Air from air preheater heat is passed through pressure fan
(10) it is sent into the secondary air box (12), is mixed with fuel gas and fuel gas is diluted to low concentration, by secondary
Mixed gas burning in boiler (11) after wind dilution.
8. the method according to the description of claim 7 is characterized in that the multiple plasma ignition torch (4) is controlled by power supply
Cabinet (14) realizes power supply switching, protection and control.
9. the method according to the description of claim 7 is characterized in that mixed by the way that sensor group (13) measurement is arranged on boiler (11)
The combustable gas concentration in gas is closed, and controls the regulating valve (9) aperture, fuel gas ratio is made to be maintained at low concentration.
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| CN109161402A (en) * | 2018-09-19 | 2019-01-08 | 天津大学 | Solid waste plasma gasification processing unit and method |
| CN114644946A (en) * | 2022-03-01 | 2022-06-21 | 徐州乔氏机械设备有限公司 | Intelligent coal gas making device |
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