CN104531226A - Biomass gasified combustion heat supply method for industrial kiln stove - Google Patents
Biomass gasified combustion heat supply method for industrial kiln stove Download PDFInfo
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- CN104531226A CN104531226A CN201410796072.1A CN201410796072A CN104531226A CN 104531226 A CN104531226 A CN 104531226A CN 201410796072 A CN201410796072 A CN 201410796072A CN 104531226 A CN104531226 A CN 104531226A
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- Prior art keywords
- heat
- biomass
- gas
- supply method
- heat supply
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Classifications
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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
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
- C10J3/60—Processes
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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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/164—Integration of gasification processes with another plant or parts within the plant with conversion of synthesis gas
- C10J2300/1643—Conversion of synthesis gas to energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention relates to a biomass gasified combustion heat supply method for an industrial kiln stove. The biomass gasified combustion heat supply method comprises the following steps: a, performing pyrolysis and gasification on biomass in sequence to prepare a biomass fuel gas; b, supplying heat to the kiln stove by heat generated by combusting the biomass fuel gas; c, providing heat for biomass pyrolysis by a high-temperature smoke gas generated by the kiln stove. The biomass fuel gas is combusted to generate high-temperature flue gas after heat is supplied to the kiln stove; much waste heat is contained in the high-temperature flue gas, a process of sufficiently utilizing the heat of the high-temperature flue gas to perform forced pyrolysis and gasification in sequence on the biomass is adopted, so that the tar components in the biomass fuel gas are reduced, the system stability and the heat utilization efficiency are improved, and the biomass fuel gas can be used for stably and efficiently supplying heat to the industrial kiln stove. The biomass gasified combustion heat supply method can be used for applying heat to the kiln stove through the biomass fuel gas.
Description
Technical field
The present invention relates to gasifying biomass and combustion field, particularly a kind of biomass gasification fired heat supply method for Industrial Stoves.
Background technology
Biological fuel gas is the gas that biomass are transformed by pyrolytic gasification reaction, is that the higher-grade belonging to biomass energy utilizes.Compare solid biomass, the use range of biological fuel gas has been widened in the change of Energy harvesting form, can be widely used in Industrial Stoves field, as molten aluminium stove, steel annealing stove, glass furnace etc.In addition, due to the characteristic of biomass energy itself, biological fuel gas is clean with it, burning pollutant discharges few advantage, can effectively substitute conventional fossil fuel and be applied in Industrial Stoves field, meet the environmental requirement of this field to fuel, effectively alleviate environmental protection pressure.
Compare traditional gas fossil oil, as Sweet natural gas, oil liquefied gas etc., biological fuel gas belongs to fuel gas with low heat value in one, and calorific value usually can at 4 ~ 12MJ/Nm
3regulate.And Industrial Stoves carry out the operations such as melting, calcining, thermal treatment usually under the high temperature conditions, need the fire box temperature of maintenance higher, usually more than 1000 DEG C.On the one hand, the flue-gas temperature that Industrial Stoves produce is very high, carries quite a few heat; On the other hand, in employing, low heat value biomass gas heating is in Industrial Stoves, and the exhaust gas volumn of generation is large, and rate of heat transfer is comparatively slow, and temperature is subject to a definite limitation.Therefore, how to be coupled from gasification, and combustion whole system aspect, make full use of each several part heat, improve the overall thermal utilising efficiency of biological fuel gas in Industrial Stoves heat supplying process, can stability and high efficiency coupling Industrial Stoves processing requirement, being the emphasis that biological fuel gas Industrial Stoves heat supply investigation and application is paid close attention to, is also the necessary factor of biological fuel gas Industrial Stoves heat supply large-scale promotion.
Summary of the invention
In order to overcome above-mentioned technical problem, the object of the present invention is to provide a kind of biomass gasification fired heat supply method for Industrial Stoves, thus improve efficiency of utilization.
The technical solution adopted in the present invention is:
For a biomass gasification fired heat supply method for Industrial Stoves, comprise the following steps:
A. biomass carry out pyrolysis and biological fuel gas is prepared in gasification successively;
B. biomass burning combustion gas produces heat is kiln heat supply;
C. the high-temperature flue gas form biomass pyrolysis that kiln produces provides heat.
As the further improvement of technique scheme, in described step c, high-temperature flue gas, except for except biomass pyrolytic heat supply, also passes through the mode heated gaseous mediums of heat exchange, gaseous media is made to heat up into high temperature gas medium, thus as the gasifying medium of gasifying biomass.
As the further improvement of technique scheme, in described step a, the product of biomass pyrolytic is pyrolysis gas and charcoal, for gasifying biomass provides heat and combustion gases after pyrolysis gas and high temperature gas medium burn, the water vapor generation reduction reaction that combustion gases, charcoal, heat and outside are injected and reforming reaction, thus generate biological fuel gas.
As the further improvement of technique scheme, the high-temperature flue gas after heat exchange becomes middle temperature flue gas and reclaims heat.
As the further improvement of technique scheme, in described step c, high-temperature flue gas provides heat by the mode form biomass pyrolysis of heat exchange, reclaims heat in warm flue gas during flue gas after heat exchange imports.
As the further improvement of technique scheme, the heat of recovery is used for heating water, thus generates water vapor.
As the further improvement of technique scheme, high temperature gas medium is simultaneously as the combustion-supporting gas of biomass fuel gas firing.
The invention has the beneficial effects as follows: biomass burning combustion gas is produce high-temperature flue gas after kiln heat supply, because containing a large amount of waste heat in high-temperature flue gas, the heat of high-temperature flue gas is made full use of the technique gasified after pyrolysis is first forced to biomass, reduce the tar ingredients in biological fuel gas, improve system stability and efficiency of utilization, make the heat supply of biological fuel gas energy stability and high efficiency in Industrial Stoves.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, the present invention is further described.
Fig. 1 is the structural representation of the system that present invention process uses;
Fig. 2 is the schematic diagram of interchanger.
Embodiment
The biomass gasification fired heating system for Industrial Stoves as shown in Figure 1, comprises kiln 1, pyrolyzer 2, vapourizing furnace 3, interchanger 4 and waste heat boiler 5.
Kiln 1 is provided with exhanst gas outlet 11 and combustion inlet, after biomass fuel gas firing, produces a large amount of energy heat supplies in kiln 1, produces high-temperature flue gas and discharge from exhanst gas outlet 11 in kiln 1.
Pyrolyzer 2 is provided with heat tunnel, pyrolysis gas outlet 21 and material outlet 22.Heat tunnel is used for passing into high-temperature gas, utilizes the heat of high-temperature gas to carry out pressure pyrolysis to the biomass of inside.The entrance of heat tunnel connects the exhanst gas outlet 11 of kiln 1, thus directly uses the high-temperature flue gas of kiln 1 as thermal source.Force pyrolysis to produce pyrolysis gas and charcoal, pyrolysis gas is discharged from pyrolysis gas outlet 21, and pyrolysis gas outlet 21 temperature controls more than 450 DEG C, and charcoal is discharged from material outlet 22.
Vapourizing furnace 3 is provided with material inlet, gas outlet, and its inside is also provided with reaction zone.In reaction zone, product---pyrolysis gas and the charcoal of main process pyrolyzer 2, carry out gasification reaction, produce high-temperature biomass gas in stove.The pyrolysis gas outlet 21 of pyrolyzer 2 passes to reaction zone by pipeline for this reason, for reaction zone provides pyrolysis gas; The material inlet of vapourizing furnace 3 connects the material outlet 22 of pyrolyzer 2, the charcoal produced receive biomass pyrolytic from pyrolyzer 2 after by pipeline; Gas outlet passes to the combustion inlet of kiln 1, for kiln 1 provides the high-temperature biomass gas of burning.
Interchanger 4 is air preheater in the present embodiment.As shown in Figure 2, interchanger 4 is provided with the high temperature inlet 41, the low-temperature outlet 42 that are interconnected, thus forms flue gas heat exchange passage; Also be provided with the low-temperature inlet 44, the hot outlet 43 that are interconnected, thus form gaseous media heat exchanger channels.High temperature inlet 41 connects the exhanst gas outlet 11 of kiln 1, and low-temperature inlet 44 is connected with gas blower 7 by pipeline, and hot outlet 43 is passed in reaction zone by pipeline.High-temperature flue gas enters flue gas heat exchange passage by high temperature inlet 41, gaseous media enters gaseous media heat exchanger channels by low-temperature inlet 44, high-temperature flue gas and gaseous media generation heat exchange afterwards, high-temperature flue-gas reduces and becomes the lower middle temperature flue gas of temperature, cryogenic gas medium heats up into high temperature gas medium, and enters reaction zone.In embodiment, gaseous media is air, oxygen enrichment.Gaseous media is in the temperature of low-temperature inlet 44 at 25 ~ 30 DEG C, and the temperature of high temperature gas medium is at 600 ~ 800 DEG C.
By above-mentioned structure, the heat of biological fuel gas is used for kiln 1, and kiln 1 heat produced in high-temperature flue gas rationally feeds back in pyrolyzer 2 and vapourizing furnace 3, and the heat in system is used appropriately, and is conducive to the efficiency of utilization of raising system.
As shown in Figure 1, in the present embodiment, reaction zone comprises top-down reduction zone 31 and oxidation zone 32, and pyrolysis gas outlet 21 and hot outlet 43 are all connected to oxidation zone 32.Therefore, pyrolysis gas and high temperature gas medium first burn in oxidation zone 32, and heat supply is in reduction zone 31.Pass into water vapor in reduction zone 31, burning in the charcoal after water vapor, pyrolysis and oxidation zone 32, the gas produced reduces in reduction zone 31, reforming reaction, and final production high-temperature biomass gas, temperature is more than 350 DEG C.
In the present embodiment, the low-temperature outlet 42 of interchanger 4 is connected to waste heat boiler 5, thus makes full use of the heat of middle temperature flue gas.Preferably, waste heat boiler 5 is provided with water inlet and vapour outlet 51, soft water enters waste heat boiler 5 from water inlet, water vapor is flashed to by after middle temperature flue gas heating, because vapour outlet 51 is by the reduction zone 31 of pipeline connection vapourizing furnace 3, therefore the water vapor generated in waste heat boiler 5 can be directly used in the reforming reaction of reduction zone 31, and the heat of middle temperature flue gas is also used appropriately.Exception, waste heat boiler 5 is an external induced draft fan 8 also, for the gas flow of whole system provides power.
Preferably, the outlet of the heat tunnel of pyrolyzer 2 is connected to the entrance of waste heat boiler 5 by pipeline.High-temperature flue gas is to after the biomass heating in pyrolyzer 2, and temperature reduces, and in discharging with interchanger 4, warm flue gas enters waste heat boiler 5 after converging jointly.
In embodiment, the combustion inlet place of kiln 1 is provided with gas burner 6, and gas burner 6 connects the gas outlet of vapourizing furnace 3, in order to the biological fuel gas of preparation in combustion gasification stove 3.Gas burner 6 is provided with combustion-supporting gas entrance 61, the hot outlet 43 of interchanger 4 connects combustion-supporting gas entrance 61 by pipeline, in high temperature gas medium, a part enters oxidation zone 32, another part enters gas burner 6 from combustion-supporting gas entrance 61, for the burning of biological fuel gas provides combustion-supporting gas.
In the present embodiment, the pipeline of various gas conveying all takes Insulation, makes surface temperature be no more than 70 DEG C, as the pipeline of high-temperature flue gas, the pipeline etc. of high temperature gas medium.
The concrete heat supply method that system in the present embodiment is used for Industrial Stoves is as follows.
Drop into biomass material in pyrolyzer 2, carry out heating make it force pyrolysis to biomass material, pyrolysis produces pyrolysis gas and charcoal.Pyrolysis gas passes in the oxidation zone 32 of vapourizing furnace 3, burns with high temperature gas medium, for reduction zone 31 provides heat and combustion gases.There is reduction reaction and reforming reaction in reduction zone 31 in combustion gases, charcoal, heat and the outside water vapor injected, thus generates biological fuel gas.
Introduced by biological fuel gas in gas burner 6 and burn, the heat of generation is used for kiln 1, and high-temperature flue gas discharged by kiln 1 afterwards, in these high-temperature flue gas, a part is introduced in pyrolyzer 2, for pyrolysis provides heat, another part is introduced in interchanger 4, lowers the temperature into middle temperature flue gas with gaseous media heat exchange.Gaseous media heats up into high temperature gas medium after being heated by high-temperature flue gas, and a part wherein introduces the oxidation zone 32 of Reaktionsofen, burns with pyrolysis gas; Another part introduces gas burner 6 as combustion-supporting gas.
Import after cooling high-temperature fume for pyrolyzer heat supply above-mentioned in warm flue gas, middle temperature flue gas is introduced waste heat boiler 5 and is reclaimed heat, these heats are used to heating water in waste heat boiler 5, make it to become water vapor, and water vapor is introduced in reduction zone 31 by pipeline and is used.
Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (7)
1., for a biomass gasification fired heat supply method for Industrial Stoves, it is characterized in that, comprise the following steps:
A. biomass carry out pyrolysis and biological fuel gas is prepared in gasification successively;
B. biomass burning combustion gas produces heat is kiln heat supply;
C. the high-temperature flue gas form biomass pyrolysis that kiln produces provides heat.
2. the biomass gasification fired heat supply method for Industrial Stoves according to claim 1, it is characterized in that: in described step c, high-temperature flue gas is except for except biomass pyrolytic heat supply, also by the mode heated gaseous mediums of heat exchange, gaseous media is made to heat up into high temperature gas medium, thus as the gasifying medium of gasifying biomass.
3. the biomass gasification fired heat supply method for Industrial Stoves according to claim 2, it is characterized in that: in described step a, the product of biomass pyrolytic is pyrolysis gas and charcoal, for gasifying biomass provides heat and combustion gases after pyrolysis gas and high temperature gas medium burn, the water vapor generation reduction reaction that combustion gases, charcoal, heat and outside are injected and reforming reaction, thus generate biological fuel gas.
4. the biomass gasification fired heat supply method for Industrial Stoves according to claim 3, is characterized in that: the high-temperature flue gas after heat exchange becomes middle temperature flue gas and reclaims heat.
5. the biomass gasification fired heat supply method for Industrial Stoves according to claim 4, it is characterized in that: in described step c, high-temperature flue gas provides heat by the mode form biomass pyrolysis of heat exchange, reclaims heat in warm flue gas during flue gas after heat exchange imports.
6. the biomass gasification fired heat supply method for Industrial Stoves according to claim 4 or 5, is characterized in that: the heat of recovery is used for heating water, thus generates water vapor.
7. the biomass gasification fired heat supply method for Industrial Stoves according to claim 2, is characterized in that: high temperature gas medium is simultaneously as the combustion-supporting gas of biomass fuel gas firing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410796072.1A CN104531226A (en) | 2014-12-18 | 2014-12-18 | Biomass gasified combustion heat supply method for industrial kiln stove |
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| CN201410796072.1A CN104531226A (en) | 2014-12-18 | 2014-12-18 | Biomass gasified combustion heat supply method for industrial kiln stove |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090968A (en) * | 2016-05-30 | 2016-11-09 | 合肥雄川机械销售有限公司 | A kind of aluminium melting furnace fume afterheat gradient utilization system |
| CN107338074A (en) * | 2017-01-25 | 2017-11-10 | 广东国能中林实业有限公司 | A kind of fluidized gasification system for preparing high heating value biological fuel gas and its application |
| CN108449939A (en) * | 2015-10-29 | 2018-08-24 | 普莱克斯技术有限公司 | Heat chemistry regeneration in glass-melting furnace and recuperation of heat |
| CN114216335A (en) * | 2021-12-15 | 2022-03-22 | 广州能源检测研究院 | Biomass gasification combustion system and process special for aluminum melting furnace |
-
2014
- 2014-12-18 CN CN201410796072.1A patent/CN104531226A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108449939A (en) * | 2015-10-29 | 2018-08-24 | 普莱克斯技术有限公司 | Heat chemistry regeneration in glass-melting furnace and recuperation of heat |
| CN108449939B (en) * | 2015-10-29 | 2020-11-06 | 普莱克斯技术有限公司 | Thermochemical regeneration and heat recovery in glass furnaces |
| CN106090968A (en) * | 2016-05-30 | 2016-11-09 | 合肥雄川机械销售有限公司 | A kind of aluminium melting furnace fume afterheat gradient utilization system |
| CN107338074A (en) * | 2017-01-25 | 2017-11-10 | 广东国能中林实业有限公司 | A kind of fluidized gasification system for preparing high heating value biological fuel gas and its application |
| CN114216335A (en) * | 2021-12-15 | 2022-03-22 | 广州能源检测研究院 | Biomass gasification combustion system and process special for aluminum melting furnace |
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Application publication date: 20150422 |
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