CN204756902U - System for utilize gasifier to realize that carbon reduces discharging - Google Patents
System for utilize gasifier to realize that carbon reduces discharging Download PDFInfo
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- CN204756902U CN204756902U CN201520309256.0U CN201520309256U CN204756902U CN 204756902 U CN204756902 U CN 204756902U CN 201520309256 U CN201520309256 U CN 201520309256U CN 204756902 U CN204756902 U CN 204756902U
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Abstract
The utility model discloses a system for utilize gasifier to realize that carbon reduces discharging, include: biomass gasification stove and be suitable for burming biomass gas fuel and discharge contain the heat energy equipment of carbon dioxide's flue gas. Wherein, the gasification agent entry of biomass gasification stove passes through the flue gas pipeline by -pass bond of pipeline and heat energy equipment, the living beings gas export of biomass gasification stove is connected with the combustor of heat energy equipment through the pipeline. The utility model discloses carry the gasification agent of regarding as the biomass gasification stove to the biomass gasification stove with some of heat energy equipment exhaust flue gas to with the carbon dioxide changing waste into valuables in the heat energy equipment exhaust flue gas, realized on the one hand that the carbon dioxide of heat energy equipment reduces discharging, on the other hand regards as the gasification agent to improve the reaction efficiency of biomass gasification stove with the flue gas of high temperature.
Description
Technical field
The utility model relates to a kind of thermal hardware exhaust treatment system, particularly a kind of system realizing carbon emission reduction.
Background technology
The concept of carbon emission reduction is derived from February, 2006 formally effective Kyoto Protocol, wherein define developed country and country with economies in transition and greenhouse gas emissions should be reduced 5.2% from nineteen ninety level during 2008-2012, and support that developed country and developing country carry out CDM (clean production mechanism) project cooperation.According to CDM mechanism, developed country can by providing with funds and the mode of technology, in reduction, lower-cost developing country had both met sustainable development requirement, contribute to again the project investment producing reduction of greenhouse gas discharge effect, exchange the part or all of carbon credits that investment items produces for, to fulfil the part of duties of cutting emissions as oneself, also reduce the reduction of discharging cost of oneself simultaneously.
" carbon budget " concept is proposed in the United Nations's " 2007 ~ 2008 years human evolution reports ", set the whole world in this century by the target of CO2 emission overall control below 1.456 trillion tons, and wish to cut down 50% on the basis of nineteen ninety to the year two thousand fifty global warming gas total release.Its approach one is that carbon price is imposed carbon tax and carried out rationed exchange system and can play a role.Carbon tax offsets by reducing Individual Income Tax the part increased, and can not increase the weight of the burden of paying tax; Two is perform more strict supervision standard, and the government that calls upon States carries out stricter standard to automotive exhaust gas, building and electric equipment; Three is the development promoting low-carbon energy supply, and carbon is caught and need exploitation with the disruptive technology such as carbon sequestration (CCS); Four is the international cooperations carrying out fund and technology transfer aspect, set up " mitigation of climate change financing mechanisms " (CCMF), annual appropriation 250 hundred million to 500 hundred million dollars, increases the investment to developing country's low-carbon energy, realizes the common objective of mitigation of climate change.According to the research of the World Bank, China has the annual potentiality reducing discharging 100,000,000 ~ 200,000,000 tons of carbon dioxide, can be the CDM project that the whole world provides over half.
For power consumption and all more serious Industrial Boiler of pollution or kiln related industry, how carrying out carbon emission reduction transformation, having become the factor that those skilled in the art must consider when designing this kind equipment.
A kind of method of reducing emission of flue gas carbonic anhydride of fire coal and resource thereof disclosed in No. 200610047522.2, Chinese patent application, it sprays into amino substance solution at coal-burning boiler afterbody and absorbs the carbon dioxide produced in coal combustion with the form of ammonium salt after pre-dedusting in carbon dioxide absorption system in flue gas, reduces discharging the carbon dioxide of in flue gas 20 ~ 95%; The carbon dioxide absorbed with the form of ammonium salt is highly purified carbon dioxide gas through isolation of purified, for industry, chemical industry, food processing, the oil industry displacement of reservoir oil etc.
And for example a kind of method controlling power-equipment disclosed in No. 201080062034.3, Chinese patent application, this power-equipment comprises: boiler, and it is suitable for the organic-fuel that burns, and is suitable for producing steam and the carbonated process gas of bag; Vapour system; And carbon dioxide capture system, it is suitable for from process gas, removing carbon dioxide at least partially by making carbon-dioxide absorbent solution contact with process gas, and the method comprises: a part for the steam produced by power-equipment boiler is transferred to the regenerator of carbon dioxide capture system; By making absorbent solution regenerate by means of carbon-dioxide absorbent solution described in the Steam Heating of passing in described regenerator; And the operation of carbon capture system is automatically controlled by means of at least one automatic controller.
For another example a kind of marine main engine waste heat recovery disclosed in No. 201310014624.4, Chinese patent application and exhaust treatment system and method, described system comprises exhaust boiler, steam turbine, generator, carbon dioxide absorption tower, water pump, water tank, horizontal ammonia convertor, alkane cracking device and deaerator, and exhaust boiler connects steam turbine; Exhaust boiler also connects carbon dioxide absorption tower; Stainless steel shower nozzle is installed in carbon dioxide absorption tower; Exhaust boiler is connected with deaerator and horizontal ammonia convertor successively; Horizontal ammonia convertor is connected with alkane cracking device by carbon steel piping; Horizontal ammonia convertor is also connected with water tank, water pump and carbon dioxide absorption tower successively; This system, based on carbon capture technology, absorbs the carbon dioxide in tail gas, reduces carbon emission.
But, the carbon capture that above patented technology discloses/carbon emission reduction method is all utilize absorbent to carry out absorbing carbon dioxide, this on the one hand adds the cost of absorbent and the cost of associated processing equipment, the harmless process problem of carbon dioxide also will considered the absorbent after using on the other hand and absorb.
Therefore, providing a kind of can reduce costs and can avoid the carbon emission reduction method and system increasing new pollution sources to become urgent problem in the industry.
Summary of the invention
The purpose of this utility model is to provide a kind of system utilizing gasification furnace to realize carbon emission reduction, according to the utility model, can realize carbon emission reduction with lower cost, and can avoid again increases new pollution sources.
According to an aspect of the present utility model, a kind of system utilizing gasification furnace to realize carbon emission reduction is provided, comprises: biomass gasifying furnace and be suitable for biomass burning gas fuel and discharge the thermal hardware of carbonated flue gas.Wherein, the gasification agent inlet of biomass gasifying furnace is connected with the flue bypass of thermal hardware by pipeline; The biogas outlet of biomass gasifying furnace is connected with the burner of thermal hardware by pipeline.
Preferably, the source of oxygen be connected with the gasification agent inlet of biomass gasifying furnace by pipeline is comprised further.More preferably, the blender for the gasification agent inlet by being delivered to biomass gasifying furnace after the flue gas from thermal hardware and the oxygen mix from source of oxygen by pipeline is comprised further.
Selectively, the air-introduced machine be arranged between blender and the gasification agent inlet of biomass gasifying furnace is comprised further.
Selectively, biomass gasifying furnace is downdraft fixed-bed gasification furnace, and gasification agent inlet is arranged on the side in gasification reaction district, and biogas outlet is arranged on the below in gasification reaction district.
Selectively, biomass gasifying furnace is updraft type fixed-bed gasification furnace, and gasification agent inlet is arranged on the below in gasification reaction district, and biogas outlet is arranged on the top in gasification reaction district.
Selectively, comprise the biogas that generates for filtering biological matter gasification furnace further with the biogas filter except tar removing and dust, biogas filter is arranged between the biogas outlet of biomass gasifying furnace with the burner of thermal hardware.
Selectively, comprise further for providing water vapour as the water vapour providing source of a part for gasifying agent to biomass gasifying furnace, water vapour providing source is connected with the gasification agent inlet of biomass gasifying furnace by pipeline.
Selectively, comprise further for providing air as the air-source of a part for gasifying agent to biomass gasifying furnace, air-source is connected with the gasification agent inlet of biomass gasifying furnace by pipeline.
In addition, a kind of method utilizing gasification furnace to realize carbon emission reduction is also provided, comprises: (1), using thermal hardware discharge carbonated flue gas be delivered to the part of biomass gasifying furnace as the gasifying agent of biomass gasifying furnace at least partially; And (2), using biomass gasifying furnace produce biogas be delivered at least partially thermal hardware as thermal hardware fuel at least partially.
Wherein, thermal hardware refers to combustion fuel and discharges the device of flue gas, and containing a certain amount of carbon dioxide in its flue gas.Thermal hardware both can be heat-exchanger rig also can be kinetic energy apparatus, and such as, it can be various types of boiler, kiln or Steam Turbine etc.
Wherein, gasification of biomass refers to living beings to be raw material, under gasifying agent effect, usually using oxygen (air, oxygen enrichment or pure oxygen), steam (or hydrogen) as gasifying agent (also referred to as gasification matter), under the high temperature conditions by thermal chemical reaction, by the process being partially converted into combustible gas flammable in living beings.The gas componant produced during gasification of biomass mainly comprises H
2, CH
4with CO etc.
The gasification of living beings is mainly carried out in gasification furnace, and due to the difference of the type of gasification furnace, gasification reaction conditions, technological process, the kind of gasifying agent, the condition such as the character of raw material and grinding particle size, its gasification reaction process is also not quite similar.But biomass gasification process substantially comprising at different conditions: C+O
2=CO
2; CO
2+ C=2CO; H
2o+C=CO+H
2deng.
Generally speaking, the real reaction process of living beings mainly comprises four parts: (1), drying layer, and wherein living beings enter gasifier from top of gasification furnace, after being heated to about about 200 ~ 300 DEG C, moisture in biomass material is first by thermal evaporation, and end product is dry material; (2), pyrolytic layer, wherein living beings dry material moves down from drying layer and enters pyrolytic layer, under high temperature action, in living beings, volatile matter will be separated out in large quantities, its operative temperature is at about 500 ~ 600 DEG C, after Volatile, living beings are remaining remaining charcoal only, and the volatile matter that wherein pyrolysis is separated out mainly comprises hydrogen, carbon monoxide, carbon dioxide, methane, tar and other hydrocarbon etc.; (3), oxide layer (being also burning zone), wherein living beings are only left charcoal after pyrolytic layer, now in oxide layer with the air generation vigorous reaction that is introduced into, discharge a large amount of heats, for the reaction in other region provides heat, in oxide layer simultaneously, be characterized in that reaction rate is fast, floor height is lower, and temperature can up to about 1000 ~ 1200 DEG C, and volatile matter participates in the laggard step-down solution of burning simultaneously; (4), reducing zone, oxygen is not had in reducing zone, charcoal generation reduction reaction in combustion product in oxide layer and steam and reducing zone, biological hydrogen and carbon monoxide, these gases and volatilization grade and define fuel gas, complete the conversion process of solid biomass to gaseous fuel, because reduction reaction is the endothermic reaction, temperature is now reduced to about 700 ~ 900 DEG C, and its calorific requirement is mainly derived from oxide layer.
Biomass gasification reaction mainly carries out in gasification furnace, and therefore gasification furnace is the main equipment of gasification of biomass, and the method for operation difference according to gasification furnace can be divided into fluidized-bed gasification furnace and fixed-bed gasification furnace.Wherein, in fluidized-bed gasification furnace, the biomass material of pulverizing is put in gasification furnace, and gasifying agent is upwards blown in gasification furnace bottom grate by air blast, and the gasification reaction of fuel completes in " boiling " state.Wherein, fixed-bed gasification furnace puts in fixed-bed gasification furnace by the biomass material of chopping by stove top charge door, material substantially carries out gasification reaction by level in stove, and the flowing of gas in stove that reaction produces will lean on chain drive blower fan to realize.
In downdraft fixed-bed gasification furnace, biomass material is sent into from the charge door of top of gasification furnace, and gasifying agent is entered in stove by the air inlet of body of heater side and participates in reaction, and the gas that reaction produces from up to down flows, and is finally discharged by the gas outlet bottom gasification furnace.Wherein, the course of reaction of living beings comprises drying layer, pyrolytic layer, reducing zone, oxide layer from top to bottom successively.Its advantage is mainly: structure is comparatively simple, good operating stability; Can uncap at any time reinforced; Tar in gas, when by high-temperature region, bottom, has and is cracked into micro-molecular gas material greatly, reduce the tar content in biological flue gas, promotes biological flue gas calorific value.
In updraft type fixed-bed gasification furnace, biomass material is sent into from top of gasification furnace, and gasifying agent is entered in stove by the air inlet of bottom of furnace body and participates in reaction, and the bottom-up flowing of gas that reaction produces finally is discharged by the gas outlet on gasification furnace top.Wherein, the course of reaction of living beings comprises drying layer, pyrolytic layer, reducing zone, oxide layer from top to bottom successively.Its advantage is mainly: the heat entrained by itself, through pyrolysis zone and dry section, is passed to biomass material by combustion gas, for drying and the thermal decomposition of raw material, reduces the temperature of combustion gas simultaneously, improves the thermal efficiency of gasification furnace; Because biomass material adds from stove top, therefore biological flue gas by top out time through material bed, have certain filtration to combustion gas, reduce the content of ashes in biological flue gas.
Selectively, in step (1), 20% ~ 40% (such as about 30%) of amount of flue gas emission thermal hardware can discharged is delivered to the part of biomass gasifying furnace as gasifying agent.
Selectively, in step (2), the biogas that biomass gasifying furnace produces all can be delivered to the whole fuel of thermal hardware as thermal hardware.Certainly, the biogas of produced by biomass gasifying furnace 50% ~ 80% also can be selected to be delivered to thermal hardware, can also to select to provide other combustion gas accounting for total amount of fuel 30% ~ 80%, such as coal gas or natural gas to thermal hardware.
Selectively, in step (2), can the biogas that produces of first filtering biological matter gasification furnace, with except after tar removing and dust, then be delivered to thermal hardware.
Selectively, may further include a part for the gasifying agent providing pure oxygen as biomass gasifying furnace, wherein, the flue gas provided to biomass gasifying furnace is 20:1 ~ 40:1 with the flow-rate ratio of the pure oxygen provided to biomass gasifying furnace, than 30:1 according to appointment.
Selectively, after the flue gas provided to biomass gasifying furnace can first mix with the pure oxygen provided to biomass gasifying furnace in blender, then biomass gasifying furnace is provided to by air-introduced machine.
Preferably, thermal hardware can be boiler or kiln, oxygen content in its flue gas of discharging be 8% ~ 10% (than according to appointment 9%), carbon dioxide content be 10% ~ 15% (than according to appointment 12%), the flue gas provided to biomass gasifying furnace and the pure oxygen mixed oxygen content in blender provided to biomass gasifying furnace be 11% ~ 15% (than according to appointment 12%), carbon dioxide content be 9% ~ 12% (than according to appointment 11%).
Preferably, comprise further and provide water vapour and/or air as the remainder of gasifying agent to biomass gasifying furnace.
According to another aspect of the present utility model, provide a kind of system utilizing gasification furnace to realize carbon emission reduction, comprising: thermal hardware, thermal hardware is suitable for biomass burning gas fuel, containing carbon dioxide in the flue gas of discharging after burning; And biomass gasifying furnace, by pipeline, biomass gasifying furnace to be connected that with the flue of thermal hardware at least part of smoke is introduced the part of biomass gasifying furnace as the gasifying agent of biomass gasifying furnace; Wherein, the biogas produced in biomass gasifying furnace at least partially by pipeline be delivered to thermal hardware as thermal hardware fuel at least partially.
Selectively, comprise source of oxygen further, source of oxygen is used for providing pure oxygen as a part for the gasifying agent of biomass gasifying furnace to biomass gasifying furnace.
Selectively, comprise blender further, after the flue gas from thermal hardware mixes in a mixer with the oxygen from source of oxygen, be delivered to biomass gasifying furnace as gasifying agent by pipeline.In addition, rotational flow fan can be set in blender to make gas and vapor permeation even.
Selectively, thermal hardware comprises burner, the burner being delivered to thermal hardware at least partially by pipeline of the biogas produced in biomass gasifying furnace.
Selectively, comprise air blast further, for the burner conveying combustion air to thermal hardware.
Selectively, the air-introduced machine be arranged between blender and biomass gasifying furnace is comprised further.
Selectively, biomass gasifying furnace selects downdraft fixed-bed gasification furnace, biomass material sends into the gasification reaction district in stove from top, and gasifying agent is supplied to gasification reaction district from the side, and the biogas of generation is pumped to the burner of thermal hardware below gasification reaction district.
Selectively, biomass gasifying furnace selects updraft type fixed-bed gasification furnace, biomass material sends into the gasification reaction district in stove from top, and gasifying agent is supplied to gasification reaction district from bottom surface, and the biogas of generation is pumped to the burner of thermal hardware above gasification reaction district.
Selectively, biomass gasifying furnace selects updraft type fixed-bed gasification furnace, it comprises body of heater, the inner space of body of heater by the first sieve plate be divided into be positioned at middle and lower part for the gasification reaction district of piling up the living beings bed of material and the charging exhaust complex zone be positioned at above gasification reaction district, wherein, the roof of body of heater is provided with biomass feed inlet, and the diapire of body of heater is provided with steam entry, hot air inlet and gasification agent inlet, and the first sieve plate is provided with living beings discharging opening.Wherein, charging exhaust complex zone is divided into the living beings feeding-passage being positioned at central authorities and the combustion gas collection passing away arranged around living beings feeding-passage by barrel, and is provided with gas outlet in the top of combustion gas collection passing away on the roof of body of heater, one end of living beings feeding-passage is communicated with the biomass feed inlet on body of heater roof, the other end of living beings feeding-passage is communicated with the living beings discharging opening on the first sieve plate, the space that the inner surface that combustion gas collection passing away is positioned at the upper surface of the first sieve plate, the outer surface of barrel and body of heater surrounds, and charging exhaust complex zone outside along body of heater outer wall around be provided with the crust of weathering for recycle charging exhaust complex zone furnace wall heat to prepare hot-air, wherein, the top of the crust of weathering is provided with cold air inlet, the bottom of the crust of weathering is provided with hot air outlet, cold air inlet is connected to blower fan by pipeline, hot air outlet is communicated with the hot air inlet on the diapire of body of heater by pipeline, thus cold air is preheated to hot-air (100 ~ 200 degrees Celsius in the crust of weathering, such as about 150 degrees Celsius) be delivered in body of heater by by hot air inlet, again with the water vapour carried by steam entry and from gasification agent inlet flue gas together with the biomass material piled up in gasification reaction district is gasified.
Selectively, comprise biogas filter further, the biogas that biomass gasifying furnace generates first through biogas filtration devices except after tar removing and dust, then the burner being delivered to thermal hardware is as fuel.
Selectively, comprise water vapour providing source further, water vapour providing source is connected water vapour to be supplied to the part of biomass gasifying furnace as gasifying agent by pipeline with biomass gasifying furnace.
Selectively, comprise air-source further, air-source is connected air to be supplied to the part of biomass gasifying furnace as gasifying agent by pipeline with biomass gasifying furnace.
Selectively, can be supplied in biomass gasifying furnace from same gasifying agent passage as the flue gas of gasifying agent, pure oxygen, water vapour, air, also can be supplied in biomass gasifying furnace from different passages.As a kind of non-limiting example, the flow-rate ratio as the flue gas of gasifying agent, pure oxygen, water vapour, air can be set to about 30:1:10:10.
Selectively, water vapour also can be utilized id reaction waste heat to prepare by biomass gasifying furnace.
Selectively, resupply in biomass gasifying furnace after also first can utilizing the residual heat of reaction preheating of biomass gasifying furnace from the air of air-source.
The beneficial effects of the utility model are: (1), the part of flue gas that thermal hardware is discharged is delivered to the gasifying agent of biomass gasifying furnace as biomass gasifying furnace, thus the carbon dioxide in the flue gas of being discharged by thermal hardware is turned waste into wealth, achieve the carbon dioxide discharge-reduction about 20% of thermal hardware on the one hand, also improve the reaction efficiency of biomass gasifying furnace on the other hand using the flue gas of high temperature as gasifying agent, namely the heat energy of flue gas have also been obtained and makes full use of; (2), using the biogas that biomass gasifying furnace produces be delivered to thermal hardware as fuel, biogas directly uses nearby, can save gas storage and conveying cost; (3), owing to not needing to provide special carbon-dioxide absorbent and associated processing equipment, the cost of carbon emission reduction is reduced; (4), this system is convenient to transform on existing thermal hardware basis.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of the system according to a kind of embodiment of the utility model.
Fig. 2 shows a kind of structural representation of exemplary gasification stove.
Fig. 3 shows the structural representation of another kind of exemplary gasification stove.
Fig. 4 shows the structural representation of another exemplary gasification stove.
Detailed description of the invention
Please refer to Fig. 1, according to a kind of non-limiting embodiment of the present utility model, the system 1000 utilizing gasification furnace to realize carbon emission reduction comprises: biomass gasifying furnace 1100, thermal hardware 1200 and blender 1300.
Biomass gasifying furnace 1100 take living beings as raw material, under gasifying agent effect, under the high temperature conditions by thermal chemical reaction, is partially converted into biogas fuel by flammable in living beings.
Thermal hardware 1200 is suitable for biomass burning gas fuel, and containing carbon dioxide in the flue gas of discharging after burning.In this non-limiting embodiment, thermal hardware 1200 is boiler.Thermal hardware 1200 comprises the burner 1201 being arranged at one end and the flue 1203 being arranged at the other end.The biogas produced in biomass gasifying furnace 1100 is delivered to burner 1201 by pipeline.Air blast 1202 is connected to burner 1201 for carrying combustion air in burner 1201.The flue gas produced after burning is expelled to chimney (not shown) via flue 1203.
Blender 1300 comprises smoke inlet 1301, oxygen intake 1302 and mixed gas outlet 1303.The sidewall of the flue 1203 of thermal hardware 1200 is connected to the smoke inlet 1301 of blender 1300 part of smoke to be introduced in blender 1300 by pipeline.Source of oxygen (not shown) is connected to the oxygen intake 1302 of blender 1300 for providing pure oxygen in blender 1300 by pipeline.Flue gas and purity oxygen are after blender 1300 fully mixes, gaseous mixture flows out from mixed gas outlet 1303, be delivered to the gasification agent inlet 1101 of biomass gasifying furnace 1100 by pipeline via air-introduced machine 1400, gaseous mixture is as a part for the gasifying agent of biomass gasifying furnace 1100.
In this non-limiting embodiment, the gasifying agent adopted in biomass gasifying furnace 1100, except the gaseous mixture of flue gas and purity oxygen, also comprises by the water vapour of water vapour providing source (not shown) supply and the air that supplied by air-source (not shown).Further, in this non-limiting embodiment, water vapour and air are also supplied by gasification agent inlet 1101.
As a kind of alternative non-limiting example embodiment, as shown in Figure 2, biomass gasifying furnace 1100 is specially downdraft fixed-bed gasification furnace 1110, biomass material sends into the gasification reaction district in stove from top material mouth 1111, gasification reaction district comprises drying layer 1113, pyrolytic layer 1114, reducing zone 1115, oxide layer 1116 from top to bottom successively.Gasification agent inlet 1112 is arranged on the side wall surface of body of heater, and gasifying agent is supplied to roughly pyrolytic layer 1114 position in gasification reaction district from the side, and the biogas of generation is pumped to the burner of thermal hardware from the biogas outlet 1117 below gasification reaction district.Dust collection chamber 1118 is provided with below gasification reaction district.
As the non-limiting example embodiment that another is alternative, as shown in Figure 3, biomass gasifying furnace 1100 is specially updraft type fixed-bed gasification furnace 1120, biomass material sends into the gasification reaction district in stove from top material mouth 1121, gasification reaction district comprises drying layer 1123, pyrolytic layer 1124, reducing zone 1125, oxide layer 1126 from top to bottom successively.Gasification agent inlet 1122 is arranged on the below in gasification reaction district, and gasifying agent is supplied to gasification reaction district from bottom surface, and the biogas outlet 1127 of biogas above gasification reaction district of generation is pumped to the burner of thermal hardware.Dust collection chamber 1128 is provided with below gasification reaction district.
As the non-limiting example embodiment that another is alternative, as shown in Figure 4, biomass gasifying furnace 1100 is specially updraft type fixed-bed gasification furnace 100, it comprises body of heater 110, the inner space of body of heater by the first sieve plate 120 be divided into be positioned at middle and lower part for the gasification reaction district 150 of piling up the living beings bed of material and charging exhaust complex zone (non-label) be positioned at above gasification reaction district 130.Wherein, the roof of body of heater 110 is provided with biomass feed inlet 115, and the diapire of body of heater 110 is provided with steam entry 116 and hot air inlet 117.
In this non-limiting embodiment, the body of heater 110 of updraft type fixed-bed gasification furnace 100 is cylindric, and the first sieve plate 120 is circular and it offers some through holes.Biomass feed inlet 115 is arranged at the central authorities of the roof of body of heater 110, and living beings discharging opening 125 is arranged at the central authorities of the first sieve plate 120.
Charging exhaust complex zone is divided into the living beings feeding-passage 160 being positioned at central authorities and the combustion gas collection passing away 170 arranged around living beings feeding-passage 160 by barrel 150.The roof of body of heater 110 is provided with biogas outlet 177 in the top of combustion gas collection passing away 170.One end of living beings feeding-passage 160 is communicated with the biomass feed inlet 115 on body of heater roof, and the other end of living beings feeding-passage 160 is communicated with the living beings discharging opening 125 on the first sieve plate 120.The space that the inner surface that combustion gas collection passing away 170 is positioned at the upper surface of the first sieve plate 120, the outer surface of barrel 150 and body of heater 110 surrounds.The below of living beings discharging opening 125 is provided with material distributing cone 166 for biomass material is dispersed to gasification reaction district 130 equably.
Combustion gas is collected in passing away 170 and is provided with heat exchange coil 140 for recycling heat in biological fuel gas once to prepare water vapour.Cold water from water pump 900 is heated to form the steam water interface of 100 degrees centigrade in heat exchange coil 140, and wherein steam quality is about 60%.
To collect in passing away 170 in combustion gas, be provided with Ceramic Balls filter course 400 for the tar in single filter biological fuel gas in the top of the first sieve plate 120 in the below of heat exchange coil 140.
In this non-limiting embodiment, this updraft type fixed-bed gasification furnace 100 further in the outside of charging exhaust complex zone along the outer wall of body of heater 110 around being provided with the crust of weathering 180, it is for recycling the furnace wall heat of charging exhaust complex zone to prepare hot-air.The top of the crust of weathering 180 is provided with cold air inlet 185, and the bottom of the crust of weathering 180 is provided with hot air outlet 186, and cold air inlet 185 is connected to blower fan 800 by pipeline, and hot air outlet 186 is communicated with the hot air inlet 117 on the diapire of body of heater 110 by pipeline.
In this non-limiting embodiment, this updraft type fixed-bed gasification furnace 100 prepares water vapour for the furnace wall heat recycling gasification reaction district with secondary around being provided with water jacket 190 along the outer wall of body of heater 110 in the outside in gasification reaction district 130 further.Steam water interface from heat exchange coil 140 is heated to improve vapor (steam) temperature and mass dryness fraction further in water jacket 190, is recycled in water jacket 190 from the backwater of steam-water separator 300 simultaneously and is heated to be water vapour to save water resource.
The top of water jacket 190 is provided with water inlet 191 and carbonated drink outlet 192, and the bottom of water jacket 190 is provided with backwater entrance 193.One end of heat exchange coil 140 is connected with water pump 900 and the other end is communicated with the water inlet 191 of water jacket 190, carries out secondary preparation to be delivered in water jacket 190 by the water vapour once prepared.
In this non-limiting embodiment, updraft type fixed-bed gasification furnace 100 is provided with steam-water separator 300 further and prepares water vapour for the aqueous water removed in water vapour with three times.Steam-water separator 300 is provided with carbonated drink entrance 301, steam (vapor) outlet 302 and backwater outlet 303.Carbonated drink entrance 301 exports 192 by pipeline and the carbonated drink of water jacket 190 and is communicated with and isolates high-purity water steam to be introduced in steam-water separator by the steam water interface in water jacket.Backwater outlet 303 to be communicated with the backwater entrance 193 of water jacket 190 by pipeline and to prepare water vapour for being sent in water jacket to heat to circulate by aqueous water isolated in steam-water separator.Steam (vapor) outlet 302 is communicated with the steam entry 116 on the diapire of body of heater 110 by pipeline.
In addition, updraft type fixed-bed gasification furnace 100 also comprises the gasification agent inlet 118 being arranged at bottom, for supplying the gaseous mixture of flue gas from blender 1300 and pure oxygen to gasification reaction district 130.
Thus, after being preheated to the hot-air of about 150 degrees Celsius from the cold air of blower fan 800 in the crust of weathering 180, be delivered in body of heater 110 via hot air inlet 117.Cold water from water pump 900 heats the steam water interface into about 100 degrees Celsius in heat exchange coil 140, in water jacket 190, heating is to improve vapor (steam) temperature and mass dryness fraction further for steam water interface, and steam water interface enters in steam-water separator 300 and isolates high-purity water steam subsequently.The hot-air prepared, water vapour and be delivered to from the flue gas of blender 1300 and the gaseous mixture of pure oxygen the biomass material 200 that gasification reaction district 130 makes wherein to pile up respectively and gasify.The biological fuel gas that gasification produces enters combustion gas via the first sieve plate 120 and collects in passing away 170, biological fuel gas is first after Ceramic Balls filter course 400 carries out single filter tar, again with the cold water heat exchange in heat exchange coil 140, finally the biological fuel gas of about 110 degrees Celsius discharges this updraft type fixed-bed gasification furnace 100 from biogas outlet 177.
As a kind of alternative non-limiting example embodiment, the biogas that first filtering biological matter gasification furnace 1100 produces, after removing tar removing and dust, then is delivered to thermal hardware.
Although described preferred embodiment of the present utility model in detail at this, but should be understood that the utility model is not limited to the concrete structure described in detail and illustrate here, other modification and variant can be realized when not departing from essence of the present utility model and scope by those skilled in the art.Such as, can not use blender and not provide pure oxygen, flue gas is directly supplied to gasification furnace as a part for gasifying agent.Or, may further include biogas filter, the biogas that biomass gasifying furnace generates first through biogas filtration devices except after tar removing and dust, then the burner being delivered to thermal hardware is as fuel.In addition, the temperature of system or pressure and other parameters suitably can be chosen in scope disclosed in the utility model according to concrete application conditions.
Claims (10)
1. the system utilizing gasification furnace to realize carbon emission reduction, comprise: biomass gasifying furnace and be suitable for biomass burning gas fuel and discharge the thermal hardware of carbonated flue gas, it is characterized in that: the gasification agent inlet of described biomass gasifying furnace is connected with the flue bypass of described thermal hardware by pipeline; The biogas outlet of described biomass gasifying furnace is connected by the burner of pipeline with described thermal hardware.
2. utilize gasification furnace to realize the system of carbon emission reduction as claimed in claim 1, it is characterized in that, comprise the source of oxygen be connected with the gasification agent inlet of described biomass gasifying furnace by pipeline further.
3. utilize gasification furnace to realize the system of carbon emission reduction as claimed in claim 2, it is characterized in that, comprise the blender for the described gasification agent inlet by being delivered to described biomass gasifying furnace after the flue gas from described thermal hardware and the oxygen mix from described source of oxygen by pipeline further.
4. utilize gasification furnace to realize the system of carbon emission reduction as claimed in claim 3, it is characterized in that, comprise the air-introduced machine be arranged between described blender and the described gasification agent inlet of described biomass gasifying furnace further.
5. the gasification furnace that utilizes according to any one of Claims 1 to 4 realizes the system of carbon emission reduction, it is characterized in that, described thermal hardware is boiler or kiln.
6. utilize gasification furnace to realize the system of carbon emission reduction as claimed in claim 5, it is characterized in that, described biomass gasifying furnace is downdraft fixed-bed gasification furnace, and described gasification agent inlet is arranged on the side in gasification reaction district, and described biogas outlet is arranged on the below in described gasification reaction district.
7. utilize gasification furnace to realize the system of carbon emission reduction as claimed in claim 5, it is characterized in that, described biomass gasifying furnace is updraft type fixed-bed gasification furnace, and described gasification agent inlet is arranged on the below in gasification reaction district, and described biogas outlet is arranged on the top in described gasification reaction district.
8. the gasification furnace that utilizes according to any one of Claims 1 to 4 realizes the system of carbon emission reduction, it is characterized in that, comprise further for filtering biogas that described biomass gasifying furnace generates with the biogas filter except tar removing and dust, described biogas filter is arranged between the described biogas outlet of described biomass gasifying furnace with the described burner of described thermal hardware.
9. the gasification furnace that utilizes according to any one of Claims 1 to 4 realizes the system of carbon emission reduction, it is characterized in that, comprise further for providing water vapour as the water vapour providing source of a part for gasifying agent to described biomass gasifying furnace, described water vapour providing source is connected with the described gasification agent inlet of described biomass gasifying furnace by pipeline.
10. the gasification furnace that utilizes according to any one of Claims 1 to 4 realizes the system of carbon emission reduction, it is characterized in that, comprise further for providing air as the air-source of a part for gasifying agent to described biomass gasifying furnace, described air-source is connected with the described gasification agent inlet of described biomass gasifying furnace by pipeline.
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| CN104879745A (en) * | 2015-05-13 | 2015-09-02 | 广州环渝能源科技有限公司 | Method and system of realizing carbon emission reduction by gasifier |
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