CN102399597A - Biomass gasifier and biomass fuel gas preparation method - Google Patents
Biomass gasifier and biomass fuel gas preparation method Download PDFInfo
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- CN102399597A CN102399597A CN2010102773538A CN201010277353A CN102399597A CN 102399597 A CN102399597 A CN 102399597A CN 2010102773538 A CN2010102773538 A CN 2010102773538A CN 201010277353 A CN201010277353 A CN 201010277353A CN 102399597 A CN102399597 A CN 102399597A
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Abstract
The invention relates to a biomass gasifier and a biomass fuel gas preparation method of the technical field of energy chemical industry. The biomass gasifier of the invention comprises a gasifier body, a feed inlet, an ash outlet and an air inlet disposed on the gasifier body, a cracking pipeline mounted in a high-temperature region inside the gasifier body, with the cracking pipeline connected to an input pipeline at one end and connected to an output pipeline at the other end. A catalyst is laid inside the cracking pipeline. And when a fuel gas inside the gasifier body enters the cracking pipeline from the input pipeline, tar in the fuel gas is cracked, and then the fuel gas is output from the biomass gasifier by the output pipeline. The invention also includes a method for preparing a biomass fuel gas with the above mentioned biomass gasifier. While preparing a biomass fuel gas, the biomass gasifier provided in the invention can substantially improve tar cracking efficiency, effectively reduce tar content in the biomass fuel gas, enhance fuel gas calorific value, and reduce environmental pollution.
Description
Technical field
The invention belongs to the derived energy chemical technical field, specifically is a kind of biomass gasifying furnace and the method for preparing biological fuel gas.
Background technology
Biomass have obtained as a kind of renewable resources using widely.Gasifying biomass is one of main mode of biomass efficient utilization.Gasifying biomass is the process that solid-state biomass is converted into geseous fuel through thermal chemical reaction.The thick coal-tar middle oil content of combustion gas is higher in the vapourizing furnace, and tar is the inevitable sub product of gasifying biomass, when high temperature, is gaseous state; Be condensed into liquid state gradually with the temperature reduction; Tar ingredients is complicated, from combustion gas, is difficult to separate effectively and handle, and has influenced the utilization of biomass energy.Cracking process is a domestic method of handling tar, can be divided into thermo-cracking and catalytic pyrolysis.Thermo-cracking is in gasification, to improve the temperature and the gas phase residence time as far as possible; Make the tar thermo-cracking; Be decomposed into permanent gases to tar and combustible gas utilizes together, thereby reduce the value volume and range of product of tar, pyrolysis method just can obtain high conversion rate more than 1100 ℃.Catalystic pyrolysis carries out catalytic pyrolysis by catalyzer to tar, can make the temperature of coke tar cracking drop to 750～900 ℃, and can further improve cracked efficient.Mostly be to adopt thermo-cracking or catalytic pyrolysis separately when handling tar in the prior art, removal effect is relatively poor.
Summary of the invention
The objective of the invention is to overcome that biological fuel gas prepares the relatively poor problem of the coal-tar middle oil removal effect of process in the prior art.
One object of the present invention is to provide a kind of biomass gasifying furnace, comprises body of heater, is arranged on opening for feed, ash output hole and blast inlet on the body of heater; The high-temperature zone inner at body of heater is provided with the cracking pipeline, and said cracking pipeline one end is connected with input channel, and the other end is connected with output channel; Said cracking pipeline middle berth is provided with catalyzer; After the intravital combustion gas of stove got into the cracking pipeline by input channel, the tar in the combustion gas was by cracking, and combustion gas is afterwards exported biomass gasifying furnace by output channel.
Preferably, said biomass gasifying furnace also comprises a three-way valve, and said three-way valve output channel respectively links to each other with the cracking pipeline, on said three-way valve, also is connected with an evacuated tube.
Preferably, said catalyzer is selected from nickel-base catalyst, natural crystal catalyzer, basic metal class catalyzer or its mixing.
Preferably, said catalyzer is selected from calcined magnesite, calcined dolomite, calcined limestone or ferriferous oxide ore or its mixing.
Preferably, said catalyzer is that calcined magnesite is (1-20) by weight proportion with calcined limestone: (2-15) mix getting.
Second target of the present invention is to provide a kind of method for preparing biological fuel gas, comprises the steps: biomass are dropped into to burn in the aforesaid biomass gasifying furnace and get.
Preferably, the ratio of weight and number of said biomass and catalyzer is (100-200): (0.1-6).
Preferably, said biomass are stalk, rice husk or branch.
The present invention has following beneficial effect: use biomass gasifying furnace of the present invention to prepare the combination that biological fuel gas has been realized pyrolysis method and catalystic pyrolysis processing tar; Tar in the combustion gas will begin hot tearing in the time of 600 ℃; And the temperature of the high-temperature zone of body of heater inside can reach more than 1000 ℃, and under the effect of high-temperature zone, the cleavage rate of tar reaches more than 75%; Under catalyst action, the cleavage rate of tar can further be brought up to more than 87% simultaneously.So, utilize biomass gasifying furnace of the present invention to prepare the efficient that biological fuel gas has improved coke tar cracking greatly, effectively reduce the coal-tar middle oil content of biological fuel gas, improved fuel gases calorific value, reduced pollution to environment.
Description of drawings
Fig. 1 is the structural representation of biomass gasifying furnace among the embodiment 1.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further.Should be understood that following examples only are used to the present invention is described but not are used to limit scope of the present invention.
Embodiment 1
The biomass gasifying furnace of present embodiment comprises body of heater 1, is arranged on opening for feed 2, ash output hole 3 and blast inlet 4 on the body of heater 1; Be provided with cracking pipeline 5 in body of heater 1 inner high-temperature zone, said cracking pipeline 5 one ends are connected with input channel 6, and the other end is connected with output channel 7; Be equipped with catalyzer 8 in the said cracking pipeline 5; After combustion gas in the body of heater 1 got into cracking pipeline 5 by input channel 6, the tar in the combustion gas was by cracking, and combustion gas afterwards is by output channel 7 output biomass gasifying furnaces; Wherein catalyzer is to be to mix at 1: 2 to get by weight proportion by calcined magnesite and calcined limestone.
When using rice husk to prepare biological fuel gas; By the weight ratio with catalyzer is 100: (0.1-6) in biomass gasifying furnace, drop into rice husk; Heat biomass gasifying furnace afterwards, rice husk produces combustion gas in the body of heater internal combustion, after combustion gas gets into cracking pipeline 5 by input channel 6; By cracking, combustion gas afterwards is by output channel 7 output biomass gasifying furnaces under the effect of high temperature and catalyzer for tar in the combustion gas.
When preparing biological fuel gas, realized the biomass gasifying furnace of use present embodiment the combination of pyrolysis method and catalystic pyrolysis processing tar; The cleavage rate of the tar in the combustion gas can reach more than 89%; Can improve the efficient of coke tar cracking greatly; Effectively reduce the coal-tar middle oil content of biological fuel gas, improved fuel gases calorific value, reduced pollution environment.
Embodiment 2
The biomass gasifying furnace of present embodiment is the improvement of on the basis of embodiment 1 vapourizing furnace, being done; The vapourizing furnace of present embodiment also comprises a three-way valve; This three-way valve output channel respectively links to each other with the cracking pipeline, on said three-way valve, also is connected with an evacuated tube.When vapourizing furnace was in normal operating conditions, the transfer tube that leads to the cracking pipeline in the three-way valve was opened, and evacuated tube is closed, and then guarantees that combustion gas is transported to the cracking pipeline; When vapourizing furnace is in the smouldering fire state; The transfer tube that leads to the cracking pipeline in the three-way valve is closed; Evacuated tube is opened, and a small amount of combustion gas and the water vapor that make the vapourizing furnace waste heat produce can be discharged from evacuated tube, in order to avoid cause water or tar in transfer tube and cracking pipeline, to deposit; Wherein catalyzer is to be to mix at 4: 3 to get by weight proportion by calcined magnesite and calcined limestone.
When using stalk to prepare biological fuel gas; Weight ratio by with catalyzer is (190-200): (0.1-6) in biomass gasifying furnace, drop into stalk; Heat biomass gasifying furnace afterwards, stalk produces combustion gas in the body of heater internal combustion, after combustion gas gets into cracking pipeline 5 by input channel 6; By cracking, combustion gas afterwards is by output channel 7 output biomass gasifying furnaces under the effect of high temperature and catalyzer for tar in the combustion gas.
When preparing biological fuel gas, realized the biomass gasifying furnace of use present embodiment the combination of pyrolysis method and catalystic pyrolysis processing tar; The cleavage rate of the tar in the combustion gas can reach more than 90%; Can improve the efficient of coke tar cracking greatly; Effectively reduce the coal-tar middle oil content of biological fuel gas, improve fuel gases calorific value, reduce environmental pollution.
In sum, can improve the efficient of coke tar cracking when biomass gasifying furnace of the present invention prepares biological fuel gas greatly, effectively reduce the coal-tar middle oil content of biological fuel gas, improve fuel gases calorific value, reduce environmental pollution.
Claims (8)
1. a biomass gasifying furnace comprises body of heater, is arranged on opening for feed, ash output hole and blast inlet on the body of heater; It is characterized in that the high-temperature zone inner at body of heater is provided with the cracking pipeline, said cracking pipeline one end is connected with input channel; The other end is connected with output channel, and said cracking pipeline middle berth is provided with catalyzer, after the intravital combustion gas of stove gets into the cracking pipeline by input channel; Tar in the combustion gas is by cracking, and combustion gas is afterwards exported biomass gasifying furnace by output channel.
2. biomass gasifying furnace as claimed in claim 1 is characterized in that, said biomass gasifying furnace also comprises a three-way valve, and said three-way valve output channel respectively links to each other with the cracking pipeline, on said three-way valve, also is connected with an evacuated tube.
3. biomass gasifying furnace as claimed in claim 1 is characterized in that, said catalyzer is selected from nickel-base catalyst, natural crystal catalyzer, basic metal class catalyzer or its mixing.
4. biomass gasifying furnace as claimed in claim 3 is characterized in that, said catalyzer is selected from calcined magnesite, calcined dolomite, calcined limestone or ferriferous oxide ore or its mixing.
5. biomass gasifying furnace as claimed in claim 4 is characterized in that, said catalyzer is that calcined magnesite is (1-20) by weight proportion with calcined limestone: (2-15) mix getting.
6. a method for preparing biological fuel gas is characterized in that, comprises the steps: biomass are dropped into to burn in the described biomass gasifying furnace of claim 1 and get.
7. the method for preparing biological fuel gas as claimed in claim 6 is characterized in that, the ratio of weight and number of said biomass and catalyzer is (100-200): (0.1-6).
8. the method for preparing biological fuel gas as claimed in claim 7 is characterized in that, said biomass are stalk, rice husk or branch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102773538A CN102399597A (en) | 2010-09-09 | 2010-09-09 | Biomass gasifier and biomass fuel gas preparation method |
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| CN2010102773538A CN102399597A (en) | 2010-09-09 | 2010-09-09 | Biomass gasifier and biomass fuel gas preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104152161A (en) * | 2014-08-18 | 2014-11-19 | 苏州新协力环保科技有限公司 | Air-cooled biomass catalytic pyrolysis reaction method |
| CN107513451A (en) * | 2017-07-10 | 2017-12-26 | 管理 | A kind of stalk coal stone talc particles formula of magnesium catalytic combustion-supporting comprehensive energy boiler |
-
2010
- 2010-09-09 CN CN2010102773538A patent/CN102399597A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104152161A (en) * | 2014-08-18 | 2014-11-19 | 苏州新协力环保科技有限公司 | Air-cooled biomass catalytic pyrolysis reaction method |
| CN107513451A (en) * | 2017-07-10 | 2017-12-26 | 管理 | A kind of stalk coal stone talc particles formula of magnesium catalytic combustion-supporting comprehensive energy boiler |
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Application publication date: 20120404 |