JP2009235335A - System of reforming woody biomass gas - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system of reforming a woody biomass gas, which attains the thermochemical regeneration of contained tar during conversion of woody biomass gas into fuel and achieves the regeneration that is excellent in cost and efficiency. <P>SOLUTION: The reforming system has a pyrolytic furnace 1, a reforming reactor vessel 2, and an engine 3. The pyrolytic furnace 1 pyrolytically decomposes woody biomass A by utilizing exhaust gas B of the engine 3. Into the reforming reactor vessel 2, granular carbide C obtained by the pyrolysis by the pyrolytic furnace 1 is supplied from its upper part, and a generated gas D obtained by the pyrolysis by the pyrolytic furnace 1 is supplied from its lower part. At a high temperature resulted by the addition of heat of partial combustion by an internal combustion method due to air F introduction to the temperature of the generated gas D, tar vapor E in the generated gas D is reacted with water vapor in the generated gas D, thus being reformed into hydrogen and carbon monoxide, carbon dioxide, etc. The engine 3 uses the reformed gas G of the generated gas D as fuel. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a woody biomass gas reforming system. That is, the present invention relates to a system that reforms a product gas obtained by pyrolyzing woody biomass and uses it as fuel.

《Technical background》
Recently, wood waste and other wood biomass have become a major theme for effective use as fuel. That is, the construction of a system that uses the product gas obtained by pyrolyzing the essence biomass in a gasification furnace as an engine fuel and effectively uses it for power generation or the like has attracted attention.

<Conventional technology>
By the way, the product gas from such woody biomass contains high-concentration tar generated during the gasification process in the gasification furnace, and various problems occur when used as engine fuel. This will cause problems with engine durability. That is, the tar contained in the product gas adheres to the engine valve and the like, causing dirt and coking, and causes various engine troubles and operation troubles.
Therefore, in this conventional example of converting woody biomass into fuel, a countermeasure for reducing and removing the tar in question has been an issue, and the tar treatment facility has been adopted as ancillary facilities.
That is, the product gas obtained by introducing woody biomass into the gasification furnace is partially burned by a tar treatment facility with a water treatment device such as water scrubbing, or oxygen supply, thereby relatively reducing tar. The tar content was reduced and removed through a tar treatment facility, etc., and then supplied to an engine for power generation.

《Information on prior art documents》
Examples of the partial combustion type tar processing equipment include those shown in the conventional technology column of the following Patent Document 1.
JP 2004-292720 A

By the way, the following problems have been pointed out with respect to such a conventional example.
<First problem>
First, the problem that the thermochemical energy of tar is not used at all has been pointed out.
In other words, the above-described conventional tar treatment facility of this type merely reduces and eliminates tar that causes engine trouble in the produced gas that is converted into fuel.
There was no idea to use the thermal energy of tar as a fuel simply by reducing and removing the tar contained in the production of woody biomass.
The thermochemical energy and thermodynamic energy that tar has inherently contained, that is, the internal energy of tar, was discarded without being utilized, manifested and utilized. No consideration was given to thermochemical regeneration of tar.

<< Second problem >>
Secondly, for this type of conventional tar treatment equipment with water treatment equipment such as water scrubbing, the water treatment equipment equipment, which is ancillary equipment, becomes larger and larger in size, equipment costs, wastewater treatment costs, maintenance costs, etc. It was pointed out that the problem was high.
In addition, regarding this kind of conventional tar processing equipment of the partial fuel system, there has been a problem that tar is not sufficiently reduced and removed.

<< About the present invention >>
In view of such a situation, the woody biomass gas reforming system of the present invention has been made to solve the above-described problems of the conventional examples.
And this invention proposes a reforming system for woody biomass gas, which is achieved firstly by thermochemical regeneration of tar, and secondly, which is achieved while being excellent in cost and efficiency. Objective.

<About each claim>
The technical means of the present invention for solving such a problem is as follows. First, claim 1 is as follows.
The wood biomass gas reforming system according to claim 1 includes a pyrolysis furnace, a reforming reactor, and an engine. The pyrolysis furnace pyrolyzes the input woody biomass.
The reforming reactor is supplied with carbide grains obtained by pyrolysis of the pyrolysis furnace from the upper part, and is supplied with product gas obtained by pyrolysis of the pyrolysis furnace from the lower part. The tar vapor contained in the product gas is reformed into hydrogen, carbon monoxide, carbon dioxide and the like. The engine uses the reformed gas of the product gas as fuel.

About Claim 2, it is as follows. The reforming system for woody biomass gas according to claim 2, wherein in the reforming reactor, the reforming reactor is configured so that the temperature of the product gas itself supplied from the pyrolysis furnace is subjected to partial combustion of the internal combustion method by introducing air. By applying heat, it is maintained in a temperature range of about 800 ° C. to 850 ° C.
The tar vapor in the product gas is reformed by reacting with water vapor by the adsorption decomposition function and catalytic function of the carbide particles.
About Claim 3, it is as follows. The reforming system for woody biomass gas according to claim 3, wherein in the reforming reactor, the carbide particles form a moving bed from the upper part to the lower part, and the generated gas is directed from the lower part to the upper part. Contact with.
Based on such contact, the generated gas is characterized in that the tar vapor is steam-reformed and discharged as a reformed gas from above.

About Claim 4, it is as follows. In the woody biomass gas reforming system according to claim 4, in claim 1, the pyrolysis furnace uses a high-temperature exhaust gas from the engine in a temperature range of about 450 ° C to about 650 ° C. Wood waste and other wood biomass are pyrolyzed by low temperature dry distillation.
Thus, the generated gas is generated together with ash, carbide particles, etc., and the generated gas is mainly composed of hydrogen, carbon monoxide, carbon dioxide, water vapor, nitrogen, etc., and contains the tar vapor. And
About Claim 5, it is as follows. The reforming system for woody biomass gas according to claim 5 is the reforming system according to claim 4, wherein in the pyrolysis furnace, generation of the tar vapor from the woody biomass is completed by dry distillation and pyrolysis in the temperature range. And there is no generation of the tar vapor from the carbide grains supplied to the reforming reactor.
About Claim 6, it is as follows. In a woody biomass gas reforming system according to a sixth aspect of the present invention, in the first aspect, the pyrolysis furnace comprises a screw extrusion method. The engine is a rotary engine, and the reformed gas is supplied through a dust removal facility and is operated using hydrogen, carbon monoxide, etc. in the reformed gas as a main fuel. To do.

<About the action>
Since the present invention comprises such means, the following is achieved.
(1) The product gas obtained by pyrolyzing the woody biomass contains carbon monoxide and hydrogen, but also contains tar vapor.
(2) The product gas is supplied from the pyrolysis furnace to the reforming reactor, and the generation of tar vapor is completed in the pyrolysis furnace.
(3) In the reforming reactor, carbide grains obtained in the pyrolysis furnace are supplied from the upper part, and the product gas is supplied from the lower part. And it is set to about 800 to 850 degreeC by the temperature of product gas and the heat of the partial combustion by air introduction.
(4) Therefore, in the reforming reactor, tar vapor is first adsorbed on the carbide particles and coked, and then reacts with water vapor in the product gas under high temperature heating to produce hydrogen, carbon monoxide, carbon dioxide. Etc., steam reforming.
(5) In the reforming reactor, the tar vapor is steam reformed in this way, and the generated gas is supplied to the engine as a reformed gas in which the fuel component is increased and the calories are increased.

(6) In the reforming system of the present invention, the thermal energy of tar vapor is also effectively used as fuel. Tar steam is used by making latent and intrinsic thermochemical energy and internal energy manifest.
(7) The thermochemical regeneration is realized by a rational enthalpy transfer system while reducing the amount of heat necessary for the reaction. In other words, in the pyrolysis furnace, the external combustion method and low-temperature carbonization using the heat of the high-temperature exhaust gas of the engine are performed, and in the reforming reactor, the heat of the air introduction and partial combustion is reduced by the amount of heat of the product gas. The internal combustion method to be applied is carried out.
(8) Further, in the reforming reactor, the carbide particles going to the lower part and the product gas going to the upper part make sufficient contact with each other over time, so that the tar steam is reliably, rapidly and efficiently steam reformed.
(9) This system is a system in which a pyrolysis furnace, a reforming reactor, and an engine are arranged in a process. The configuration is simple, the size is reduced, and processing operations and maintenance are easy.
(10) Now, the reforming system of the present invention exhibits the following effects.

<< First effect >>
First, thermochemical regeneration of tar is realized. That is, in the woody biomass gas reforming system of the present invention, when the woody biomass production gas is combusted, the contained tar is not only reduced and removed, but also the heat of the tar, as in the above-described conventional example. Energy is also effectively used as fuel.
Tar uses latent thermochemical energy, thermodynamic energy, that is, internal energy, in a manifestation.
And this thermochemical regeneration of tar is prepared without difficulty by low temperature carbonization of the external combustion method using the heat quantity of the high temperature engine exhaust gas in the pyrolysis furnace, and the heat quantity of the generated gas in the reforming reactor Furthermore, the process proceeds without difficulty by an internal combustion method in which the amount of heat of partial combustion by introducing air is added.

<< Second effect >>
Secondly, this is achieved while being excellent in cost and efficiency. That is, in the woody biomass gas reforming system of the present invention, first, carbide grains are supplied from the upper part of the reforming reactor, and the product gas is supplied from the lower part, and both are in sufficient contact. Therefore, the tar in the product gas is reliably, quickly and efficiently modified to hydrogen, carbon monoxide, carbon dioxide, etc., and has better tar reduction and removal performance than the above-mentioned conventional example. ing.
Even if the reformed gas obtained by the system of the present invention is used as an engine fuel, engine trouble due to tar adhesion, dirt and coking does not occur, and engine durability is improved.
Also, since tar is modified, the large-scale and large-scale water treatment equipment is not used as ancillary equipment as in the above-mentioned conventional example, and it is excellent in equipment cost, wastewater treatment cost, maintenance cost, etc. ing.
As described above, the effects exerted by the present invention are remarkably large, such as all the problems existing in this type of conventional example are solved.

《About drawing》
Hereinafter, the woody biomass gas reforming system of the present invention will be described in detail based on the best mode for carrying out the invention shown in the drawings.
FIG. 1 is a configuration flowchart for explaining the best mode for carrying out the present invention.

<About the pyrolysis furnace 1>
The wood biomass A gas reforming system of the present invention includes a pyrolysis furnace 1, a reforming reactor 2, and an engine 3. First, the pyrolysis furnace 1 will be described.
The pyrolysis furnace 1 pyrolyzes the input woody biomass A. That is, the pyrolysis furnace 1 uses the high-temperature exhaust gas B from the engine 3 to pyrolyze wood waste materials and other wood biomass A by low temperature dry distillation in a temperature range of about 450 ° C. to 650 ° C. To do.
This pyrolysis produces a product gas D together with ash, carbide particles C, etc., and the product gas D contains hydrogen, carbon monoxide, carbon dioxide, water vapor, nitrogen, etc. as a main component, and contains tar vapor E. ing.
In the pyrolysis furnace 1, the generation of the tar vapor E is completed by dry distillation and pyrolysis in the above temperature range, and the tar particles are also supplied to the carbide particles C supplied to the reforming reactor 2. The occurrence of E is not seen.

Such a pyrolysis furnace 1 will be further described in detail. First, the pyrolysis furnace 1 uses the high-temperature exhaust gas B from the engine 3 using the rotary engine, and has a temperature range of about 450 ° C. to 650 ° C., particularly about 500 ° C. to 600 ° C. The temperature is maintained.
The exhaust gas B is exhausted from the engine 3 at a high temperature of about 750 ° C. to 900 ° C., and then led to the pyrolysis furnace 1 via the pipe line 4. The pyrolysis furnace 1 is maintained in the above temperature range by an external heating method (indirect heating method) using such heat quantity and sensible heat of the exhaust gas B. Note that this temperature range can be held without difficulty by the exhaust gas B.
And this temperature range is a temperature range where generation | occurrence | production of the tar vapor | steam E from the wood biomass A by low temperature dry distillation and thermal decomposition is completed, ie, the temperature range where the tar vapor E runs out. If the temperature is below this temperature range, the generation of tar vapor E is incomplete, and if it exceeds this temperature range, the generation of carbide grains (char char which is charcoal grains) becomes difficult.

Then, the woody biomass A such as dried wood waste and wood chips is fed from the raw material hopper 5 into the pyrolysis furnace 1 through the quantitative feeder 6 at a room temperature of about 25 ° C. As the essential biomass A, such wood-based biomass resources are typical, but other plant-based and waste-based biomass resources can also be used.
The woody biomass 1 charged into the pyrolysis furnace 1 is pyrolyzed by low-temperature carbonization in the above temperature range, so that a product gas D is produced as a pyrolysis gas together with solids such as carbon, ash, and carbide particles C. The
The product gas D is mainly composed of carbon monoxide (CO), carbon dioxide (CO ₂ ), hydrogen (H ₂ ), moisture (H ₂ O), nitrogen (N ₂ ), methane (CH ₄ ), and the like. . For example, the composition of the product gas D is by volume, carbon monoxide 16.1%, carbon dioxide 10.7%, methane 3.0%, hydrogen 11.0%, moisture 15.5%, Oxygen is 0.3% and nitrogen is 43.3%. For example, the amount of heat is about 4,467 to 5,078 kJ / Nm ³ (1,067 to 1,213 kcal / Nm ³ ) in LHV.
Then, with respect to such product gas D, further, at a concentration of at least, for example, about 0.5 g / Nm ^3, tar vapors E are mixed. The tar vapor E is mainly composed of hydrocarbons and is in the form of viscous fine particles, paper, or vaporized. In this way, the product gas D containing the tar vapor E is discharged from the thermal decomposition furnace 1 and is kept warm with a heat insulating material in the pipe line 7 in order to avoid liquefaction, solidification, adhesion, coking, etc. of the tar vapor E due to a temperature drop. And supplied to the reforming reactor 2 via a dust remover.
The illustrated pyrolysis furnace 1 is of the screw extrusion type, and the endothermic amount of the pyrolysis reaction system of the woody biomass A as a raw material is only about 6% of the raw material calorific value.
The pyrolysis furnace 1 is as described above.

<About the reforming reactor 2>
Next, the reforming reactor 2 will be described. The reforming reactor 2 adds the heat of partial combustion of the internal combustion method by introducing air F to the temperature of the product gas D itself supplied from the pyrolysis furnace 1, for example, about 800 ° C. to 850 ° C. Maintained in the temperature range.
The carbide particles C obtained by pyrolysis of the pyrolysis furnace 1 are supplied from the upper part, and the product gas D obtained by pyrolysis of the pyrolysis furnace 1 is supplied from the lower part. The tar vapor E contained therein is reformed into hydrogen, carbon monoxide, carbon dioxide and the like.
That is, in the reforming reactor 2, the carbide particles C are in contact with the product gas D from the lower part to the upper part while forming a moving layer from the upper part to the lower part. Based on such contact, the tar vapor E in the product gas D reacts with the water vapor in the product gas D by the adsorption decomposition function and the catalytic function of the carbide particles C, and is steam reformed. Gas G is discharged from the top.

Such a reforming reactor 2 will be further described in detail. First, the reforming reactor 2 is typically maintained in a temperature range of about 800 ° C. to 850 ° C., at least in a temperature range of 600 ° C. to 900 ° C.
That is, the reaction heat of partial combustion based on preheated air F (oxygen) introduced to make up for the shortage based on the temperature of the product gas D supplied from the pyrolysis furnace 1 (for example, about 500 ° C. to 600 ° C.). Is maintained in the above temperature range. That is, a method is adopted in which the amount of heat by the direct heating method is added to the amount of heat of the product gas D itself that is the reaction target.
Further, the steam reforming is performed using steam contained in the product gas D, but steam can be supplied also from the attached steam supply means. That is, the fed product gas D contains water vapor, and steam reforming proceeds therewith. However, when the product gas D has a small amount of water vapor, a shortage of water vapor can be supplied. Yes.

The reforming reactor 2 is supplied with carbide grains C from above. Carbide grains C obtained by pyrolyzing woody biomass A by dry distillation, that is, charcoal grains obtained as unburned burned in the pyrolysis furnace 1 are supplied from above. The carbide grains C exhibit a support function and a catalyst function for steam reforming of the tar steam E, and are also steam reformed to hydrogen, carbon monoxide and the like.
That is, the carbide grains C are mainly composed of carbon, and are produced as a porous residue when the carbonaceous material is carbonized. And while functioning as a trap, adsorption | suction, carrying | support, and an integrated layer of the tar vapor | steam E, it functions as a catalyst layer for coking of the tar vapor | steam E and steam reforming reaction. Further, the carbide grains C themselves are steam-reformed and gasified to hydrogen, carbon monoxide, or the like.

In the reforming reactor 2, the tar vapor E in the product gas D, which is supplied from the lower part and goes upward, is adsorbed and supported by the carbide particles C supplied from the upper part and going downward. And coked. The coke reacts with steam as a gasifying agent based on the action of heat and the action of the catalyst, is converted into hydrogen, carbon monoxide, carbon dioxide, methane, etc., and is steam reformed. A so-called water gasification reaction proceeds.
In the reforming reactor 2, the tar vapor E in the product gas D of the woody biomass A is steam-reformed in this way, and the carbide particles C filled therein are also steam-reformed, thereby reforming. Gas G is generated.
The reformed gas G obtained by reforming the product gas D in this way has a tar concentration of less than 0.1 g / Nm ³ , and the amount of heat is LHV, for example, 5,542 kJ / Nm ³ (1,324 kcal). / Nm ³ ). That is, the reformed gas G is a rich gas in which the calorie is increased by about 10 to 20% by the reforming of the tar steam E and further the carbide grains C as compared with the heat quantity at the time of the product gas D before the reforming described above. In the figure, H is ash and is discharged from the lower portion of the reforming reactor 2 as a residue such as carbide grains C.
The reforming reactor 2 is as described above.

《Reaction formula etc.》
Next, the reaction formula and the like will be described. In the reforming reactor 2, steam reforming or the like proceeds according to the following chemical reaction formula.
First, the carbide grains C are steam-reformed by the chemical reaction formula of the following chemical formula 1 using steam as a gasifying agent by the action of heat, and are vaporized and gasified into hydrogen and carbon monoxide.
At the same time, on the surface of the carbide particles C where such reaction proceeds, the tar vapor E is first adsorbed and then decomposed into coke and hydrogen, and this coke becomes a part of the carbide particles C. In such carbide particles C, the following chemical reactions 2 and 3 occur, and hydrogen, carbon monoxide, and carbon dioxide are generated.

That is, in the reaction formula of Chemical Formula 2, coke, that is, carbon reacts with steam and is steam reformed to carbon monoxide and hydrogen. In the system of carbon and water vapor, the enthalpy of the system is increased by applying a high temperature and gasified into a mixed gas of carbon monoxide and hydrogen by an endothermic reaction, but the amount of generated hydrogen is minimal.
On the other hand, in the reaction formula of Chemical Formula 3, carbon reacts with steam and is steam reformed to carbon dioxide and hydrogen. This is a case where a larger amount of water vapor than in the reaction formula of chemical formula 2 acts, and carbon monoxide in the chemical formula of chemical formula 2 is completely reformed, and is gasified into carbon dioxide and hydrogen by an endothermic reaction, The amount of hydrogen produced is maximized.
In the chemical formula 3, the carbon monoxide produced in the chemical formula 2 reacts with water vapor by the following shift reaction of chemical formula 4, which is an exothermic reaction, and is reformed and converted to carbon dioxide and hydrogen. . When the following reaction formula 4 is added to the chemical formula 2, the chemical formula 3 is obtained.

In the reforming reactor 2, steam reforming proceeds according to the chemical formula 2 when the chemical shift reaction does not occur, and according to the chemical formula 3 when the chemical shift reaction occurs. However, in reality, there is a high possibility that steam reforming will proceed according to the reaction formula intermediate between Chemical Formula 2 and Chemical Formula 3 according to the degree of occurrence of the Chemical Reaction 4 shift reaction that reduces the carbon monoxide concentration. A mixed gas of carbon dioxide and hydrogen is generated as the reformed gas G.
Of course, in view of the temperature dependence of these reactions, the reaction formula of the chemical formula 2 has a higher endotherm than the chemical formula of the chemical formula 3, so that the higher the temperature, for example, about 850 ° C., the chemical formula 2 Therefore, the shift reaction of Formula 4 can be suppressed. On the other hand, for example, when the temperature is about 800 ° C., the shift reaction of Chemical Formula 4 easily occurs and the chemical reaction of Chemical Formula 3 easily occurs.
The reaction formula and the like are as described above.

≪About engine 3≫
Next, the engine 3 will be described. The engine 3 uses the reformed gas G of the product gas D as a fuel.
That is, the engine 3 is composed of a rotary engine, and the reformed gas G is supplied via a dust removal facility, and is operated using hydrogen, carbon monoxide, methane, etc. in the reformed gas G as main fuels.
The reformed gas G in the illustrated example is supplied to the engine 3 in the pipe line 8 via a cooling unit, a pump for pressure feeding and flow rate adjustment (not shown), and the like. The main shaft of the engine 3 is connected to a generator 9 installed adjacent thereto, and the drive is used for power generation.
The engine 3 is as described above.

《Action etc.》
The woody biomass A gas reforming system of the present invention is configured as described above. Therefore, it becomes as follows.

  (1) The product gas D obtained by pyrolyzing the woody biomass A contains carbon monoxide and hydrogen, but also contains tar vapor E.

  (2) The product gas D is supplied from the pyrolysis furnace 1 to the reforming reactor 2. In the pyrolysis furnace 1, the generation of tar vapor E from the woody biomass A is completed and exhausted based on the temperature range of about 450 ° C. to 650 ° C.

(3) The reforming reactor 2 is supplied with the carbide particles C obtained in the pyrolysis furnace 1 from the upper part and supplied with the product gas D from the lower part.
The reforming reactor 2 is heated to about 800 ° C. to 850 ° C. by adding the heat of partial combustion of the internal combustion method by introducing the air F to the concentration of the product gas D supplied in this way.

(4) Therefore, in the reforming reactor 2, the tar vapor E contained in the product gas D is first adsorbed on the outer surface of the carbide grains C and coked, and then heated in the product gas D under high temperature heating. It reacts with steam and is steam reformed to hydrogen, carbon monoxide, carbon dioxide, etc.
For steam reforming, steam in the product gas D is used, but steam may be supplied separately if it is insufficient.

  (5) In the reforming reactor 2, the tar vapor E and further the carbide particles C react with water vapor or air F as an oxidant, thereby being reformed to hydrogen or carbon monoxide, and the product gas D is The reformed gas G is increased in calorie due to an increase in fuel components and supplied to the engine 3 as fuel.

(6) In the reforming system of the present invention, hydrogen and carbon monoxide are reformed and generated from the tar vapor E and the carbide grains C in this way. When the woody biomass A product gas D is converted into fuel, the thermal energy of the tar vapor E and the carbide grains C is also effectively used as fuel.
The tar vapor E is made available by making use of latent thermochemical energy, thermodynamic energy, that is, internal energy U (exactly part of ΔU), which is extracted and utilized ( In tar vapor E, the conversion and transfer of this internal energy ΔU is equivalent to the transfer of system enthalpy ΔH).

(7) And in this reforming system, such a thermochemical regeneration of the tar steam E is realized at a low temperature by reducing the amount of heat necessary for the reaction, and by a rational enthalpy transfer system. The
That is, first, in the pyrolysis furnace 1, thermal decomposition is carried out with a reasonable margin of heat by an external heating method (indirect heating method) using the amount of heat of the high-temperature exhaust gas B of the engine 3 as it is, and low temperature dry distillation. . Further, in the reforming reactor 2, by an internal combustion method (direct heating method) in which air F (oxygen) is introduced to the amount of heat of the product gas D supplied from the pyrolysis furnace 1 and the amount of heat of partial combustion is added. The necessary enthalpy is obtained and reforming is carried out without difficulty.
Further, such a thermochemical regeneration reaction of the tar vapor E is an endothermic reaction, and from this regeneration reaction, a combustible gas having a calorific value far exceeding the endothermic amount, that is, hydrogen, carbon monoxide, or the like is obtained. Therefore, literally, the internal energy ΔU of the tar vapor E becomes obvious and can be used.

(8) Furthermore, in the reforming reactor 2 of this reforming system, the carbide particles C are supplied from the upper part, and the product gas D is supplied from the lower part. The product gas D heading from the lower part to the upper part can be sufficiently contacted over a necessary time.
Therefore, the generated gas D is steam reformed from the contained tar vapor E reliably, quickly and efficiently by the adsorption decomposition function and catalytic function of the carbide particles C. The tar vapor E is steam reformed to hydrogen, carbon monoxide, carbon dioxide, etc., and is reliably reduced and removed.

(9) In addition, this reforming system is a system in which the pyrolysis furnace 1, the reforming reactor 2, and the engine 3 are interrelated in a process manner, and the overall configuration is simple and the size is reduced. In addition, processing operations and maintenance are simple and easy.
The operation of the present invention is as described above.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration flow diagram for explaining a best mode for carrying out the invention of a woody biomass gas reforming system according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pyrolysis furnace 2 Reforming reactor 3 Engine 4 Pipe line 5 Raw material hopper 6 Fixed feeder 7 Pipe line 8 Pipe line 9 Generator A Woody biomass B Exhaust gas C Carbide particle D Generated gas E Tar steam F Air G Reformed gas H ash

Claims (6)

A woody biomass gas reforming system comprising a pyrolysis furnace, a reforming reactor, and an engine, wherein the pyrolysis furnace pyrolyzes input woody biomass,
The reforming reactor is supplied with carbide grains obtained by pyrolysis of the pyrolysis furnace from the upper part, and is supplied with product gas obtained by pyrolysis of the pyrolysis furnace from the lower part. The tar vapor contained in the product gas is reformed into hydrogen, carbon monoxide, carbon dioxide, etc.,
The wood biomass gas reforming system, wherein the engine uses the reformed gas of the product gas as a fuel. 2. The woody biomass gas reforming system according to claim 1, wherein the reforming reactor adds the heat of partial combustion of the internal combustion method by introducing air to the temperature of the product gas itself supplied from the pyrolysis furnace. Is maintained in a temperature range of about 800 ° C. to 850 ° C.,
A reforming system for woody biomass gas, wherein the tar vapor in the product gas is reformed by reacting with water vapor by an adsorption decomposition function and a catalytic function of the carbide particles. 3. The woody biomass gas reforming system according to claim 2, wherein in the reforming reactor, the carbide particles contact with the generated gas from the lower part to the upper part while forming a moving bed from the upper part to the lower part. And
The woody biomass gas reforming system is characterized in that, based on such contact, the tar gas is steam-reformed and the reformed gas is discharged as a reformed gas from above. 2. The wood biomass gas reforming system according to claim 1, wherein the pyrolysis furnace uses a high-temperature exhaust gas from the engine in a temperature range of about 450 ° C. to 650 ° C. Pyrolyzing other woody biomass by low temperature carbonization,
Thus, the generated gas is generated together with ash, carbide particles, etc., and the generated gas is mainly composed of hydrogen, carbon monoxide, carbon dioxide, water vapor, nitrogen, etc., and contains the tar vapor. A wood biomass gas reforming system.   In the wood biomass gas reforming system according to claim 4, in the pyrolysis furnace, generation of the tar vapor from the wood biomass is completed by dry distillation and pyrolysis in the temperature range, A wood biomass gas reforming system, characterized in that the tar vapor is not generated from the carbide particles supplied to the reforming reactor. The woody biomass gas reforming system according to claim 1, wherein the pyrolysis furnace comprises a screw extrusion method.
The engine is composed of a rotary engine, and the reformed gas is supplied through a dust removal facility and is operated using hydrogen, carbon monoxide, etc. in the reformed gas as a main fuel. Woody biomass gas reforming system.

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