CN105823074A - Oxygen-enriched and energy-saving combustion system capable of achieving zero emission of nitrogen oxides - Google Patents
Oxygen-enriched and energy-saving combustion system capable of achieving zero emission of nitrogen oxides Download PDFInfo
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- CN105823074A CN105823074A CN201610299367.7A CN201610299367A CN105823074A CN 105823074 A CN105823074 A CN 105823074A CN 201610299367 A CN201610299367 A CN 201610299367A CN 105823074 A CN105823074 A CN 105823074A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/007—Supplying oxygen or oxygen-enriched air
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
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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
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—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
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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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
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
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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
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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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
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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
- C10J2300/0903—Feed preparation
- C10J2300/0906—Physical processes, e.g. shredding, comminuting, chopping, sorting
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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
- C10J2300/0903—Feed preparation
- C10J2300/0909—Drying
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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
- C10J2300/0913—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
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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
- C10J2300/0973—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
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1625—Integration of gasification processes with another plant or parts within the plant with solids treatment
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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
- F23C2202/00—Fluegas recirculation
- F23C2202/50—Control of recirculation rate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/07005—Injecting pure oxygen or oxygen enriched air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—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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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
Abstract
The invention discloses an oxygen-enriched and energy-saving combustion system capable of achieving zero emission of nitrogen oxides. The system is composed of an oxygen supply unit, a fuel supply unit, an oxygen-enriched combustor, a heating device with a hearth combustion space, a single-tower desulfuration dust remover, a flue gas flow recirculation device, a flue gas pipeline, a process pipeline and the like. According to the system, an oxygen-enriched gas obtained from air through separation is used as oxygen for combustion, and replaces oxygen needed for conveying air into a hearth for combustion; generation of the nitrogen oxides is avoided by preventing nitrogen gas from entering the hearth to participate in a combustion reaction; and because the redundant nitrogen gas is prevented from participating in a combustion process, a total amount of the generated flue gas after the combustion is greatly reduced compared with the traditional air combustion manner, so that heat loss brought by the heating device is also reduced, and then fuel is saved and energy consumption is reduced. The single-tower desulfuration dust remover is arranged on an exhaust section for the flue gas of the heating device, and capable of eliminating harmful substances such as sulfides and dust in the flue gas.
Description
Technical field
The present invention relates to fossil energy combustion field, in particular to a kind of oxygen-enriched energy-saving combustion system of nitrogen oxides zero-emission.
Background technology
The survival and development of the mankind be unable to do without the energy.The life style of modern humans, not only a large amount of consumption resources and energy, and also discharge substantial amounts of pollutant every day, earth environment is caused serious impact.Energy and environment are the two large problems of society.The energy demand of 87% derives from Fossil fuel in the world, during these fuel combustions, can be to the substantial amounts of carbon dioxide of airborne release, and wherein coal is the abundantest fossil fuel resource, accounts for more than the 70% of world's fossil fuel reserves.Burning of coal and utilize the resource and environmental problem caused, causes the extensive attention of international community further.
China is one of a few country with coal as main energy sources in the world, and according to statistics, China 90% sulfur dioxide, 67% nitrogen oxides, 70% smoke discharge amount come from the burning of coal.Wherein, the smoke emissioning pollution problem such as coal fired power plant, coal-burned industrial boiler, coal-fired furnace kiln is the most prominent.
Implementing GB13223-2011 from 1 day January in 2012, the soot emissions to coal-burning boiler are limited to≤30mg/Nm3Higher to territorial development density, environmental bearing capacity starts to weaken, or atmospheric environment capacity is less, ecological environment frailty, and being susceptible to serious atmospheric problem of environmental pollution and needing strictly to control the emission limit of the regional coal-burning boiler flue dust of Air Pollutant Emission is 20mg/Nm3, improve by about one time than the discharge index performed by GB13223-2003.Zhujiang River triangle, the Yangtze River Delta, Beijing-tianjin-tangshan Area are as key area, and the environmental protection pressure faced also can be bigger than general area.
The sulfur dioxide SO2 emission limit of coal-burning boiler is controlled at 100mg/m by GB13223-20113, the boiler that was constructed and put into operation before 31 days except December in 2003, W type flame hearth boiler, existing CFBB take 200mg/m3Emission limit outside, the thermal power generation boiler sulfur dioxide SO2 emission limit of key area is controlled at 50mg/m3。
The GB13223-2011 nitrogen oxides NO to coal-burning boilerXEmission limit controls at 100mg/m3, the boiler that was constructed and put into operation before 31 days except December in 2003, dimorphism flame hearth boiler, existing CFBB take 200mg/m3Emission limit outside, the thermal power generation boiler nitrogen oxides NO to key areaXEmission limit controls at 100mg/m3, this standard reaches the discharge standard of even better than developed country.
In addition GB13223-2011 also increases the heavy metal contaminants emission limit of mercury and mercuric compounds newly.Mercury and mercuric compounds discharge to coal-burning boiler is limited to 0.03mg/m3。
At present China greatly develops using fuel oil and combustion gas as the oil-gas two-way boiler of fuel, and the potential making every effort to play to greatest extent the energy utilizes, and realizes again minimum pollutant emission simultaneously, makes fossil fuel resource reach efficiently, the purpose of clean utilization.
If not taking to reduce sulfur dioxide, the measure of discharged nitrous oxides for fuel boiler in correlation technique, sulfur dioxide, discharged nitrous oxides concentration will be unable to problem up to standard, the most not yet proposes effective solution.
Summary of the invention
Embodiments provide a kind of oxygen-enriched energy-saving combustion system of nitrogen oxides zero-emission, if not taking to reduce sulfur dioxide, the measure of discharged nitrous oxides at least to solve fuel boiler in correlation technique, sulfur dioxide, discharged nitrous oxides concentration will be unable to technical problem up to standard.
An aspect according to embodiments of the present invention, provide a kind of oxygen-enriched energy-saving combustion system of nitrogen oxides zero-emission, including: oxygen feed unit, fuel supply unit, oxygen-enriched burner, the heater in band hearth combustion space, single column desulfurizing dust-collector, smoke reflux device and flue, wherein, oxygen feed unit is connected with oxygen-enriched burner pipeline respectively with fuel supply unit；Oxygen-enriched burner is connected with heater；Heater is connected with single column desulfurizing dust-collector pipeline；Single column desulfurizing dust-collector is connected with flue；Smoke reflux device is connected with oxygen-enriched burner and flue respectively.
Further, oxygen-enriched burner is connected with the supply side of oxygen feed unit, wherein, needed for oxygen-enriched burner, oxygen from liquid oxygen tank or oxygen pipeline or is provided by oxygen feed unit, and oxygen feed unit includes: aerator or air compressor, air purifier and air cushioning tank pipeline are sequentially connected and connect；Air cushioning tank is connected with absorption A tower and absorption B tower inlet pipeline respectively；Absorption A tower and absorption B tower inlet pipeline are sequentially connected connect with vacuum pumps and denitrogen deafener pipeline；Absorption A tower and absorption B tower outlet conduit are sequentially connected with oxygen surge tank and oxygen compressor and connect, or aerator or air compressor, air cushioning tank, air purifier and electric heater pipeline are sequentially connected and connect；Electric heater is connected with membrane separator inlet pipeline；The primary outlet of membrane separator is sequentially connected connects with vacuum pump, oxygen surge tank and oxygen compressor pipeline, second outlet of membrane separator is sequentially connected connects with control valve and denitrogen deafener pipeline, or air compressor, Precooling unit, molecular sieve-4 A tower, molecular sieve B tower and cold box unit pipeline are sequentially connected and connect；Main heat exchanger within cold box unit and decompressor respectively and between fractionating column pipeline be connected；First outlet of fractionating column is sequentially connected connects with nitrogen buffer tank, nitrogen compressor pipeline, and the second outlet of fractionating column is sequentially connected connects with oxygen surge tank, oxygen compressor pipeline.
Further, oxygen-enriched burner is connected with the supply side of fuel supply unit, wherein, fuel oil or fuel gas that needed for oxygen-enriched burner, fuel source connects in pipeline or provided by fuel supply unit, fuel supply unit includes: pulverizing drying unit is connected with fine coal pressurized delivered unit pipe；(or aerator, fine coal pressurized delivered unit and steam suppling tube road are connected burner with air compressor respectively；Burner is connected with slagging-off pond, cooler pipeline respectively by gasification furnace；Cooler is connected with dry method dust, wet scrubbing pipeline.
Further, oxygen feed unit is connected with oxygen regulating valve, and oxygen regulating valve is connected with oxygen-enriched burner；Fuel supply unit is connected with fuel control valve, and fuel control valve is connected with oxygen-enriched burner；Oxygen-enriched burner is connected with heater；Wherein, the oxygen that the fuel that fuel supply unit provides and oxygen feed unit provide is sufficiently mixed in oxygen-enriched burner, is lighted by auto lighting switch, and is popped one's head in by ion probe or ultraviolet and flame-observing hole detection combustion position.
Further, the hearth combustion space entry of heater is connected with oxygen-enriched burner, the offgas outlet pipeline of heater is connected with single column desulfurizing dust-collector, wherein, the rotating jet flow district of side towards the fire and the convection current heat absorption district of non-side towards the fire it is provided with in heater, wherein, closed cavity is made by metal tube or metallic plate by heat absorption district, is flowable absorber in cavity.
Further, single column desulfurizing dust-collector includes: calper calcium peroxide allotter or sulfur dioxide treatment module are connected with dedusting and desulfurization chamber import；Clean air chamber is connected with dedusting and desulfurization chamber；Dedusting and desulfurization chamber is connected with taper hopper；Taper hopper is connected with ash bucket or ash bin.
Further, smoke reflux device includes: air-introduced machine is connected with the joint portion of the burner hearth of heater with single column desulfurizing dust-collector outlet conduit and oxygen-enriched burner respectively, wherein, the partial fume of single column desulfurizing dust-collector outlet drain is back to the joint portion of oxygen-enriched burner and the burner hearth of heater by air-introduced machine, air-introduced machine entrance is connected with regulation single plate valve, and regulation single plate valve is used for regulating smoke backflow amount.
Further, system also includes: temperature controller, being connected with oxygen regulating valve, fuel control valve, wherein, temperature controller regulates the uninterrupted of oxygen and fuel entrance oxygen-enriched burner to realize heat energy conveying balance respectively by controlling oxygen regulating valve and fuel control valve.
In embodiments of the present invention, air is passed through the oxygen rich gas oxygen as burning of isolated by the oxygen-enriched energy-saving combustion system of nitrogen oxides zero-emission, substitute traditional feeding by air in burner hearth as the oxygen needed for burning, the generation of nitrogen oxides is got rid of by stoping nitrogen to enter burner hearth participation combustion reaction, simultaneously because do not have unnecessary nitrogen to participate in combustion process, the total amount that after greatly reducing burning compared with traditional air burning mode, flue gas produces, therefore the heat loss that heater smoke evacuation is taken away also is reduced, save fuel, reduce energy consumption.Single column desulfurizing dust-collector is placed in the discharge section of heater flue gas, removes the harmful substances such as the sulfide in flue gas, dust.This system can stop the generation of nitrogen oxides in heater combustion process effectively, reduces after heater burning sulfur dioxide, the content of dust in smoke evacuation, reduces the total amount of heater combustion exhaust gas and the heat loss taken away, has reached the effect of energy-saving and emission-reduction.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the total technological process schematic diagram of the oxygen-enriched energy-saving combustion system of nitrogen oxides zero-emission according to embodiments of the present invention；
Fig. 2 is the process flow diagram of a kind of optional oxygen feed unit according to embodiments of the present invention；
Fig. 3 is the process flow diagram of another kind of optional oxygen feed unit according to embodiments of the present invention；
Fig. 4 is the process flow diagram of according to embodiments of the present invention another optional oxygen feed unit；
Fig. 5 is the process flow diagram of a kind of optional fuel supply unit according to embodiments of the present invention；And
Fig. 6 is the schematic diagram of the internal structure of single column desulfurizing dust-collector according to embodiments of the present invention.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a present invention part rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all should belong to the scope of protection of the invention.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, " second " etc. are for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that the data of so use can be exchanged in the appropriate case, in order to embodiments of the invention described herein can be implemented with the order in addition to those here illustrating or describing.In addition, term " includes " and " having " and their any deformation, it is intended to cover non-exclusive comprising, such as, contain those unit that the process of a series of unit, system, product or equipment are not necessarily limited to clearly list, but can include the most clearly listing or for intrinsic other unit of these processes, product or equipment.
According to embodiments of the present invention, provide the embodiment of a kind of oxygen-enriched energy-saving combustion system of nitrogen oxides zero-emission, this system can stop NO_x formation in heater combustion process effectively, reduce after heater burning sulfur dioxide, the content of dust in smoke evacuation, reduce the total amount of heater combustion exhaust gas and the problems such as the heat loss taken away.This system can be made up of oxygen feed unit, fuel supply unit, oxygen-enriched burner, the heater in band hearth combustion space, single column desulfurizing dust-collector, smoke reflux device, flue gas pipeline, process pipeline etc..This system described can apply to the fields such as oil, chemical industry, thermal power plant, city thermal, metallurgy, coking.
Fig. 1 is the total technological process schematic diagram of the oxygen-enriched energy-saving combustion system of nitrogen oxides zero-emission according to embodiments of the present invention, as described in Figure 1, this system may include that oxygen feed unit 1, oxygen regulating valve 2, fuel supply unit 3, fuel control valve 4, oxygen-enriched burner 5, the heater 6 in band hearth combustion space, single column desulfurizing dust-collector 7, chimney 8, regulation single plate valve 9, air-introduced machine 10, temperature controller 11, specifically:
As it is shown in figure 1, oxygen feed unit 1 is connected with oxygen regulating valve 2 pipeline, oxygen regulating valve 2 is connected with oxygen-enriched burner 5 pipeline；Fuel supply unit 3 is connected with fuel control valve 4 pipeline, and fuel control valve 4 is connected with oxygen-enriched burner 5 pipeline；Oxygen-enriched burner 5 is connected with the heater 6 in band hearth combustion space, and the heater 6 in band hearth combustion space is connected with single column desulfurizing dust-collector 7 pipeline, and single column desulfurizing dust-collector 7 is connected with chimney 8 pipeline；Oxygen-enriched burner 5 is sequentially connected connects with air-introduced machine 10, regulation single plate valve 9, chimney 8 (import) pipeline；Temperature controller 11 is connected with oxygen regulating valve 2, fuel control valve 4.
It should be noted that the technological process of this system can be followed successively by: work process such as fuel supply unit 1 and oxygen feed unit 3-----oxygen-enriched burner 5-----heater 6------desulfurizing dust-collector 7-----smoke backflow 9 and 10-----chimneys 8.Air is passed through the oxygen rich gas oxygen as burning of isolated by this system, substitute traditional feeding by air in heating furnace as the oxygen needed for burning, the generation of nitrogen oxides is got rid of by stoping nitrogen to enter burner hearth participation combustion reaction, simultaneously because do not have unnecessary nitrogen to participate in combustion process, the total amount that after greatly reducing burning compared with traditional air burning mode, flue gas produces, therefore the heat loss that heater smoke evacuation is taken away also is reduced, save fuel, reduce energy consumption.Meanwhile, single column desulfurizing dust-collector is placed in the discharge section of heater flue gas, removes the harmful substances such as the sulfide in flue gas, dust.
Separately below to the subsystems in this oxygen-enriched energy-saving combustion system of nitrogen oxides zero-emission, may include that oxygen feed unit, fuel supply unit, oxygen-enriched combustion system, heater, single column desulfurizing dust-collector and smoke reflux device describe in detail, specifically:
Alternatively, the oxygen of oxygen-enriched burner is connected with the supply side of oxygen feed unit, the generation of oxygen can use spatial division technology, it is possible to use the method such as " air pressure swing absorption process ", " method that air film filters ", " method of air deep-cooling processing ", " coming to liquid oxygen tank or oxygen pipeline " obtains oxygen.Introduce the technological process of the oxygen feed unit of above-mentioned oxygen acquisition methods and correspondence thereof separately below:
Air pressure swing absorption process
Fig. 2 is the process flow diagram of a kind of optional oxygen feed unit according to embodiments of the present invention, as in figure 2 it is shown, the implication that the label in Fig. 2 represents is respectively as follows: 1-aerator or air compressor, 2-air cleaning, 3-air cushioning tank, 4-adsorbs A tower, 5-adsorbs B tower, 6-oxygen surge tank, 7-vacuum pump, 8-denitrogen deafener, 9-oxygen compressor.
As in figure 2 it is shown, the technological process utilizing air pressure swing absorption process to obtain oxygen can be described as: aerator 1 (or air compressor machine air compressor) is sequentially connected connects with air purifier 2 and air cushioning tank 3 pipeline；May be used for utilizing aerator 1 (or air compressor machine air compressor) to carry out air compression, the humid air after compression goes oil removing and water through air purifier 2, and satisfactory air enters air cushioning tank 3.Air cushioning tank 3 is connected with absorption A tower 4 and absorption B tower 5 inlet pipeline respectively, absorption A tower 4 and absorption B tower 5 inlet pipeline are sequentially connected connect with vacuum pumps 7 and denitrogen deafener 8 pipeline, and absorption A tower 4 and absorption B tower 5 outlet conduit are sequentially connected connect with oxygen surge tank 6 and oxygen compressor 9；May be used for utilizing absorption A tower 4 and absorption molecular sieve within B tower 5 to carry out the nitrogen in air and oxygen separating, nitrogen after separation is discharged in air through vacuum pump 7 and denitrogen deafener 8, the heater that the oxygen of acquisition is delivered in present system through oxygen surge tank 6 and oxygen compressor 9.
The method that air film filters
Fig. 3 is the process flow diagram of another kind of optional oxygen feed unit according to embodiments of the present invention, as it is shown on figure 3, the implication that the label in Fig. 3 represents is respectively as follows: 1-aerator or air compressor, 2-air cushioning tank, 3-air purifier, 4-electric heater, 5-membrane separator, 6-vacuum pump, 7-oxygen surge tank, 8-oxygen compressor, 9-denitrogen deafener.
As it is shown on figure 3, the technological process that the method utilizing air film to filter obtains oxygen can be described as: aerator 1 (or air compressor machine air compressor) is sequentially connected connects with air cushioning tank 2, air purifier 3 and electric heater 4 pipeline；May be used for utilizing aerator 1 (or air compressor machine air compressor) to carry out air compression, the humid air after compression enters air cushioning tank 2, then goes oil removing and water through air purifier 3, and satisfactory air enters electric heater 4, carries out air heating.Electric heater 4 is connected with membrane separator 5 inlet pipeline, the primary outlet of membrane separator 5 is sequentially connected connects with vacuum pump 6, oxygen surge tank 7 and oxygen compressor 8 pipeline, and second outlet of membrane separator 5 is sequentially connected connects with control valve and denitrogen deafener 9 pipeline；The air that may be used for utilizing heating enters membrane separator 5, polymer compound film in membrane separator 5, the nitrogen in air and oxygen separating is carried out under certain infiltration motive force effect, nitrogen after separation is discharged in air through controlling valve and denitrogen deafener 9, the heater that the oxygen of acquisition is delivered in present system through oxygen surge tank 7 and oxygen compressor 8.
The method of air deep-cooling processing
Fig. 4 is the process flow diagram of according to embodiments of the present invention another optional oxygen feed unit, as shown in Figure 4, the implication that the label in Fig. 4 represents is respectively as follows: 1-air compressor, 2-Precooling unit, 3-molecular sieve-4 A tower, 4-molecular sieve B tower, 5-cold box unit, 6-oxygen surge tank, 7-oxygen compressor, 8-nitrogen buffer tank, 9-nitrogen compressor, 10-main heat exchanger, 11-decompressor, 12-fractionating column.
As shown in Figure 4, the technological process utilizing air deep-cooling processing method to obtain oxygen can be described as: air compressor 1 is sequentially connected connects with Precooling unit 2, molecular sieve-4 A tower 3, molecular sieve B tower 4 and cold box unit 5 pipeline；May be used for utilizing air compressor 1 and carrying out air compression, humid air after compression enters Precooling unit 2 and carries out air cooling, cooling air respectively enters molecular sieve-4 A tower 3 and molecular sieve B tower 4, and the moisture in air and carbon dioxide are removed clean, and satisfactory air enters cold box unit 5.Main heat exchanger 10 within cold box unit 5 is connected with pipeline between decompressor 11 and fractionating column 12, fractionating column 12 first outlet is sequentially connected connects with nitrogen buffer tank 8, nitrogen compressor 9 pipeline, and fractionating column 12 second outlet is sequentially connected connects with oxygen surge tank 6, oxygen compressor 7 pipeline；May be used for utilizing air to enter in cold box unit 5, do work through main heat exchanger 10 and decompressor 11 and air is converted into liquid air by gaseous state, enter fractionating column 12, utilize the boiling point difference of oxygen, nitrogen component, so that oxygen and nitrogen separate in fractionating column 12, liquid nitrogen after separation sends into nitrogen buffer tank 8 by fractionating column 12 first outlet, bottles or the most defeated after nitrogen compressor 9 supercharging.Liquid oxygen after separation sends into oxygen surge tank 6, the heater being delivered in present system after oxygen compressor 7 supercharging by fractionating column 12 second outlet.
Alternatively, in fuel supply unit, the fuel of oxygen burner 5 supplies with it and is connected, source or the generation of fuel can be " fuel oil of pipeline connection or fuel gas ", " combustible gas that coal gasifier gasification produces ", it should be noted that coal can be lump coal, broken coal, fine coal, water-coal-slurry etc..The technical process of fuel supply unit is as shown in Figure 5, wherein, the implication that the label in Fig. 5 represents is respectively as follows: 1-air compressor (or aerator), 2-pulverizing drying unit, 3-fine coal pressurized delivered unit, 4-burner, 5-gasification furnace, 6-cooler, 7-dry method dust, 8-wet scrubbing, 9-remove the gred pond.
As it is shown in figure 5, the technological process of the combustible gas of coal gasifier gasification generation can be described as: pulverizing drying unit 2 is connected with fine coal pressurized delivered unit 3 pipeline；Burner 4 is connected with air compressor 1 (or aerator), fine coal pressurized delivered unit 3 and steam suppling tube road respectively；Burner 4 is connected with slagging-off pond 9, cooler 6 pipeline；Cooler 6 is connected with dry method dust 7, wet scrubbing 8 pipeline.May be used for utilizing feed coal to enter pulverizing drying unit 2, after precrushing, enter the drying system of coal, make the moisture in coal less than 2%, be milled into coal dust subsequently in coal pulverizer.Mixed in burner 4 with air and steam by the coal dust gas after the pressurization of fine coal pressurized delivered unit 3, through the coal burner feeding gasification furnace of burner 4；Rapid generating gasification reaction in gasification furnace 5, the solid slag of the molten state of formation flows into down slagging-off pond 9, bottom；A large amount of synthesis gas that gasification produces carry substantial amounts of ash, upwards go out gasification furnace 5, in cooler 6 after cooled cooling, the raw gas of output enters dry method dust 7 and wet scrubbing 8 carries out udst separation, and the coal gas after purification is delivered to the heater in present system.
Alternatively, as shown in Figure 1, oxygen-enriched combustion system may include that oxygen feed unit 1 is connected with oxygen regulating valve 2, oxygen regulating valve 2 is connected with oxygen-enriched burner 5, fuel supply unit 3 is connected with fuel control valve 4, fuel control valve 4 is connected with oxygen-enriched burner 5, oxygen-enriched burner 5 is connected with the heater 6 of band hearth combustion, fuel is sufficiently mixed in oxygen-enriched burner 5 with oxygen-enriched, can be lighted by its auto lighting switch, and be popped one's head in by ion probe or ultraviolet and flame-observing hole detection combustion position.
Alternatively, as shown in Figure 1, the hearth combustion space entry of the heater 6 with hearth combustion space is connected with oxygen-enriched burner 5, the rotating jet flow district of side towards the fire and the convection current heat absorption district of non-side towards the fire is set in this heater 6, closed cavity can be made by metal tube or plate by heat absorption district, it is flowable absorber in cavity, such as boiler, petrochemical industry tubular heater and other industrial furnaces, the offgas outlet pipeline of this heater 6 is connected with single column desulfurizing dust-collector 7.
Alternatively, as shown in Figure 6, the implication that label represents in figure 6 is respectively as follows: 1-calper calcium peroxide allotter (sulfur dioxide SO to the internal structure of single column desulfurizing dust-collector2Processing module), 2-cleaning air chamber, 3-dedusting and desulfurization chamber, 4-taper hopper, 5-ash bucket (or ash bin).As shown in Figure 6, calper calcium peroxide allotter (sulfur dioxide SO2Processing module) 1 it is connected with dedusting and desulfurization chamber 3 import, clean air chamber 2 is connected with dedusting and desulfurization chamber 3, and dedusting and desulfurization chamber 3 is connected with taper hopper 4, and taper hopper 4 is connected with ash bucket (or ash bin) 5.Dedusting and desulfurization chamber 3 is internal is provided with 24～36 whirly separators, it should be noted that the number of whirly separator can design according to concrete condition.
As shown in figures 1 to 6, the technological process of single column desulfurizing dust-collector can be described as: calper calcium peroxide allotter 1 is connected with single column desulfurizing dust-collector 7 inlet pipeline, and single column desulfurizing dust-collector 7 outlet conduit is connected with chimney 8.May be used for utilizing the flue gas in the heater 6 in band hearth combustion space to enter single column desulfurizing dust-collector 7, according to the content of sulfur in fuel, fine-powdered desulfurizing agent is evenly spread to flue gas from entrance, desulfurizing agent and the sulfur dioxide SO in flue gas2In this single column desulfurizing dust-collector 7 fully reaction formed the reactant of weight granule with flue gas in grit be deposited to the timing of laying dust district, bottom and remove, the flue gas of environment protection standard enters airborne release by chimney.
Alternatively, as shown in Figure 1, environment protection standard flue gas wherein part after smoke reflux device may include that single column desulfurizing dust-collector 7 process passes through the joint portion that air-introduced machine 10 is back to the burner hearth of oxygen-enriched burner 2 and heater 6, smoke backflow amount is adjusted by air-introduced machine 10 entrance regulation single plate valve 9, its purpose is used for slowing down oxygen-enriched vigorous combustion response speed, avoids heater 6 hot-spot.Smoke reflux device especially set out carries out ultralow nitrogen oxide NOx discharge, technique suitability after oxygen-enriched power-saving technology upgrading for existing heater 6, it is provided that optimum solution.
Alternatively, the high temperature endothermic body (such as steam, conduction oil, water, other working medium) that heater 6 fuel displaces in combustion can be delivered to the heat supply users such as factory, power plant, city thermal.
Alternatively, temperature controller 11 in the oxygen-enriched energy-saving combustion system of nitrogen oxides zero-emission of the embodiment of the present invention can be connected with oxygen regulating valve 2, fuel control valve 4, wherein, temperature controller 11 regulates oxygen and the uninterrupted of fuel entrance oxygen-enriched burner 5, to realize the purpose of heat energy conveying balance respectively by controlling oxygen regulating valve 2 and fuel control valve 4.
The oxygen-enriched energy-saving combustion system of nitrogen oxides zero-emission of the embodiment of the present invention can reduce the burning-point of fuel, accelerate burning velocity, promotion burning completely, improves flame temperature, reduces the exhaust gas volumn after burning, sulfur dioxide SO in discharging fume after improving heat utilization ratio and reducing heater burning2, the content of dust, it is possible to realize energy-saving and emission-reduction.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not has the part described in detail, may refer to the associated description of other embodiments in certain embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, can realize by another way.Wherein, device embodiment described above is only schematically, the division of the most described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, the most multiple unit or assembly can in conjunction with or be desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be the INDIRECT COUPLING by some interfaces, unit or module or communication connection, can be being electrical or other form.
The described unit illustrated as separating component can be or may not be physically separate, and the parts shown as unit can be or may not be physical location, i.e. may be located at a place, or can also be distributed on multiple unit.Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (8)
1. the oxygen-enriched energy-saving combustion system of nitrogen oxides zero-emission, it is characterised in that including:
Oxygen feed unit, fuel supply unit, oxygen-enriched burner, the heater in band hearth combustion space, single column desulfurizing dust-collector, smoke reflux device and flue,
Wherein, described oxygen feed unit is connected with described oxygen-enriched burner pipeline respectively with described fuel supply unit；Described oxygen-enriched burner is connected with described heater；Described heater is connected with described single column desulfurizing dust-collector pipeline；Described single column desulfurizing dust-collector is connected with described flue；Described smoke reflux device is connected with described oxygen-enriched burner and described flue respectively.
System the most according to claim 1, it is characterized in that, described oxygen-enriched burner is connected, wherein with the supply side of described oxygen feed unit, needed for described oxygen-enriched burner, oxygen from liquid oxygen tank or oxygen pipeline or is provided by described oxygen feed unit, and described oxygen feed unit includes:
Aerator or air compressor, air purifier and air cushioning tank pipeline are sequentially connected and connect；Described air cushioning tank is connected with absorption A tower and absorption B tower inlet pipeline respectively；Described absorption A tower and described absorption B tower inlet pipeline are sequentially connected connect with vacuum pumps and denitrogen deafener pipeline；Described absorption A tower and described absorption B tower outlet conduit are sequentially connected with oxygen surge tank and oxygen compressor and connect, or
Described aerator or described air compressor, described air cushioning tank, described air purifier and electric heater pipeline are sequentially connected and connect；Described electric heater is connected with membrane separator inlet pipeline；The primary outlet of described membrane separator is sequentially connected connects with described vacuum pump, described oxygen surge tank and described oxygen compressor pipeline, and second outlet of described membrane separator is sequentially connected connects with control valve and described denitrogen deafener pipeline, or
Described air compressor, Precooling unit, molecular sieve-4 A tower, molecular sieve B tower and cold box unit pipeline are sequentially connected and connect；Main heat exchanger within described cold box unit and decompressor respectively and between fractionating column pipeline be connected；First outlet of described fractionating column is sequentially connected connects with nitrogen buffer tank, nitrogen compressor pipeline, and the second outlet of described fractionating column is sequentially connected connects with described oxygen surge tank, described oxygen compressor pipeline.
System the most according to claim 1, it is characterized in that, described oxygen-enriched burner is connected with the supply side of described fuel supply unit, wherein, fuel oil or fuel gas that needed for described oxygen-enriched burner, fuel source connects in pipeline or provided by described fuel supply unit, described fuel supply unit includes:
Pulverizing drying unit is connected with fine coal pressurized delivered unit pipe；(or aerator, described fine coal pressurized delivered unit and steam suppling tube road are connected burner with air compressor respectively；Described burner is connected with slagging-off pond, cooler pipeline respectively by gasification furnace；Described cooler is connected with dry method dust, wet scrubbing pipeline.
System the most according to claim 1, it is characterised in that described oxygen feed unit is connected with oxygen regulating valve, and described oxygen regulating valve is connected with described oxygen-enriched burner；Described fuel supply unit is connected with fuel control valve, and described fuel control valve is connected with described oxygen-enriched burner；Described oxygen-enriched burner is connected with described heater；Wherein, the oxygen that the fuel that described fuel supply unit provides and described oxygen feed unit provide is sufficiently mixed in described oxygen-enriched burner, is lighted by auto lighting switch, and is popped one's head in by ion probe or ultraviolet and flame-observing hole detection combustion position.
System the most according to claim 1, it is characterized in that, the hearth combustion space entry of described heater is connected with described oxygen-enriched burner, the offgas outlet pipeline of described heater is connected with described single column desulfurizing dust-collector, wherein, the rotating jet flow district of side towards the fire and the convection current heat absorption district of non-side towards the fire it are provided with in described heater, wherein, closed cavity is made by metal tube or metallic plate by described heat absorption district, is flowable absorber in described cavity.
System the most according to claim 1, it is characterised in that described single column desulfurizing dust-collector includes:
Calper calcium peroxide allotter or sulfur dioxide treatment module are connected with dedusting and desulfurization chamber import；Clean air chamber is connected with described dedusting and desulfurization chamber；Described dedusting and desulfurization chamber is connected with taper hopper；Described taper hopper is connected with ash bucket or ash bin.
System the most according to claim 1, it is characterised in that described smoke reflux device includes:
Air-introduced machine is connected with the joint portion of the burner hearth of described heater with described single column desulfurizing dust-collector outlet conduit and described oxygen-enriched burner respectively, wherein, the partial fume of described single column desulfurizing dust-collector outlet drain is back to the joint portion of described oxygen-enriched burner and the burner hearth of described heater by described air-introduced machine, described air-introduced machine entrance is connected with regulation single plate valve, and described regulation single plate valve is used for regulating smoke backflow amount.
System the most according to claim 4, it is characterised in that described system also includes:
Temperature controller, it is connected with described oxygen regulating valve, described fuel control valve, wherein, described temperature controller regulates the uninterrupted of oxygen and the fuel described oxygen-enriched burner of entrance to realize heat energy conveying balance respectively by controlling described oxygen regulating valve and described fuel control valve.
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| CN107894006A (en) * | 2017-12-20 | 2018-04-10 | 重庆富燃科技股份有限公司 | A kind of storage oxygen combustion energy saving emission-reducing system and method using clean energy resource electric power |
| CN108332206A (en) * | 2018-04-13 | 2018-07-27 | 梁海 | A kind of refuse burning system |
| CN108975915A (en) * | 2018-08-23 | 2018-12-11 | 索通发展股份有限公司 | The technique of prebaked anode production process minimum discharge |
| CN109323236A (en) * | 2018-09-30 | 2019-02-12 | 西安鑫顶天装备智能科技有限公司 | A kind of energy saving technique of boiler combustion |
| CN113979615A (en) * | 2021-09-08 | 2022-01-28 | 山东郓城正华玻璃科技有限公司 | Combustion control system and method for glass kiln |
| CN114733318A (en) * | 2022-04-07 | 2022-07-12 | 武汉科技大学 | Treatment method of sintering flue gas |
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| CN113979615A (en) * | 2021-09-08 | 2022-01-28 | 山东郓城正华玻璃科技有限公司 | Combustion control system and method for glass kiln |
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