JP2010126595A - System of reforming woody biomass gas - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system of reforming a woody biomass gas that first, attains conversion of chemical energy of contained tar to chemical energy of a fuel gas effectively, during the conversion of the woody biomass gas into fuel, and second, achieves the conversion excellently in cost and efficiency. <P>SOLUTION: This reforming system includes a pyrolytic furnace 1, a reforming reactor 2, and an engine 3. The pyrolytic furnace 1 pyrolytically decomposes the woody biomass A using an exhaust gas B from the engine 3. Into the reforming reactor 2, granular carbide C obtained by the pyrolysis in the pyrolytic furnace 1 is fed from its upper part, and a generated gas D obtained by the pyrolysis in the pyrolytic furnace 1 is fed from its bottom. Under an elevated temperature produced by heat of the generated gas D and additional partial combustion heat of an internal combustion method due to introduction of air F to the 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, methane and carbon monoxide, 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》
In recent years, there has been a growing interest in effectively using wood waste and other wood biomass as fuel. In particular, the construction of a system that uses the product gas obtained by gasifying essential biomass as engine fuel and effectively uses it for power generation or the like is attracting attention.

<Conventional technology>
By the way, the generated gas from such woody biomass contains tar generated during the gasification process in the gasification furnace. In pyrolysis, which is the initial reaction of gasification, a large amount of tar is generated along with gases such as methane and carbon monoxide. The concentration of the tar decreases due to the reaction with oxygen and water vapor, which are gasifying agents, but often does not decrease until it is used as engine fuel.
That is, if it is used as the fuel for the engine as it is, various troubles occur and a problem occurs in the durability of the engine. For example, tar contained in the product gas adheres to engine valves and others, and causes dirt and coking, which causes various engine troubles and operation troubles.
Therefore, in this type of conventional example of converting woody biomass into fuel, a countermeasure to reduce and eliminate the tar in question has been an issue, and tar treatment equipment has been adopted as an essential accessory equipment.
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, a problem has been pointed out that the chemical energy of tar cannot be efficiently converted into the chemical energy of fuel gas.
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.
When converting the product gas of woody biomass into fuel, there was no idea to efficiently convert the chemical energy of tar into the chemical energy of fuel gas simply by reducing and removing the contained 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.
According to the present invention, a first object is to propose a woody biomass gas reforming system in which tar is converted into fuel gas, and secondly, this is achieved at low cost and high efficiency. .

<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 to hydrogen, methane, carbon monoxide and the like. The engine uses the reformed gas of the product gas as fuel.

About Claim 2, it is as follows. In the woody biomass gas reforming system according to claim 2, in the reforming reactor according to claim 1, the reforming reactor adds heat of partial combustion by air introduction to sensible heat of the product gas itself supplied from the pyrolysis furnace. By adding, it is maintained in a temperature range of 700 ° C. or higher.
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.
Then, based on such contact, the product gas containing the tar vapor is steam-reformed, so that the reformed gas is discharged from the upper part of the reforming reactor.

About Claim 4, it is as follows. In the woody biomass gas reforming system according to claim 4, in claim 1, the pyrolysis furnace is heated to a temperature of about 450 ° C or more and 650 ° C or less using high-temperature exhaust gas from the engine, Pyrolysis of wood waste and other wood biomass.
Thus, the produced gas is produced together with carbide grains, etc., and the produced gas contains hydrogen, carbon monoxide, carbon dioxide, water vapor, nitrogen and the like as main components and contains the tar vapor.
About Claim 5, it is as follows. The reforming system for woody biomass gas according to claim 5 is characterized in that, in claim 4, the pyrolysis furnace has completed generation of the tar vapor from the woody biomass by dry distillation and pyrolysis in the temperature range. The tar vapor is not generated 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. Further, 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 main fuel. To do.

<About the action>
Since the present invention comprises such means, the following is achieved.
(1) The gas generated by pyrolyzing the woody biomass contains carbon monoxide, hydrogen and hydrocarbon gas, but also contains tar vapor.
(2) The product gas is supplied from the pyrolysis furnace to the reforming reactor. In the pyrolysis furnace, the generation of tar vapor is completed.
(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 maintained at 700 degreeC or more by adding the heat of the partial combustion by air introduction to the sensible heat of product gas.
(4) In the reforming reactor, tar vapor is first coked on the surface of the carbide grains, and then reacts with water vapor in the product gas at a high temperature to produce hydrogen, methane, carbon monoxide, etc. Reformed.

(5) In the reforming reactor, tar steam is steam-reformed in this way, and the product gas becomes a reformed gas with increased calories and becomes a fuel gas that can be supplied to the engine.
(6) This system is composed of a pyrolysis furnace, a reforming reactor, and an engine, and has a simple structure, is easy to miniaturize, and is easy to operate and maintain.
(7) Now, the reforming system of the present invention exhibits the following effects.

  Such conversion of tar into fuel gas 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 generated gas is reliably, rapidly and efficiently reformed to hydrogen, methane, carbon monoxide, etc., and is superior in tar reduction and removal performance compared to the above-described conventional example.

Further, even if the reformed gas obtained by the system of the present invention is used as engine fuel, engine trouble due to tar adhesion, dirt and coking does not occur, and engine durability is improved.
Moreover, since tar is reformed, the large-scale and large-scale water treatment equipment is not used as ancillary equipment as in the conventional example of this type described above, and the equipment cost, wastewater treatment cost, maintenance cost, etc. are excellent. Yes.
As described above, all the problems of the conventional example of this type are solved, and the effects exhibited by the present invention are remarkably large.

《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 and FIG. 2 are flow charts for explaining the best mode for carrying out the present invention. FIG. 1 shows one example, and FIG. 2 shows another example.

<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 and other wood biomass A in a temperature range of about 450 ° C. to 650 ° C.
And by this thermal decomposition, the product gas D is produced together with the carbide grains C, and the product gas D contains tar vapor E in addition to hydrogen, methane, carbon monoxide, carbon dioxide, water vapor and the like.
In the pyrolysis furnace 1, the generation of the tar vapor E is completed by the thermal decomposition in the above temperature range, and the generation of the tar vapor E does not occur in the carbide particles C supplied to the reforming reactor 2. Absent.

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 contains carbon monoxide (CO), carbon dioxide (CO ₂ ), hydrogen (H ₂ ), moisture (H ₂ O), methane (CH ₄ ), and the like as main components. For example, when pyrolyzing a dry wood chip, the composition of the product gas D is 29.6% carbon monoxide, 16.7% carbon dioxide, 5.3% hydrocarbon, and 2.3% hydrogen by volume. 4%, moisture is 46.0%. 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.
In addition, for example, 700 g / Nm ³ of tar vapor E is mixed in the generated gas D. The generated gas D containing the tar vapor E is discharged from the pyrolysis 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 temperature drop, and dust removal. It is supplied to the reforming reactor 2 via the machine.
The pyrolysis furnace 1 is composed of, for example, a screw extrusion system, but various other systems can be adopted, for example, rotary kilns, screw kilns, belt conveyor systems, and the like.
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 is maintained in a temperature range of, for example, about 700 ° C. or more by adding heat of partial combustion by introducing air F to the temperature of the product gas D itself supplied from the pyrolysis furnace 1. .
In the example of FIG. 1, carbide particles C obtained by pyrolysis of the pyrolysis furnace 1 are supplied from the top, and product gas D obtained by pyrolysis of the pyrolysis furnace 1 is supplied from the bottom. Thus, the tar vapor E contained in the product gas D is reformed to hydrogen, methane, carbon monoxide 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 700 ° C. or higher, particularly in a temperature range of 700 ° C. or higher and 900 ° C. or lower, and at least in a temperature range of 600 ° C. or higher and 900 ° C. or lower.
That is, the reaction temperature of the partial combustion is added to the sensible heat of the product gas D supplied from the pyrolysis furnace 1 to maintain the 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 the woody biomass A by dry distillation, that is, charcoal grains obtained as unburned parts burnt in the pyrolysis furnace 1, are supplied from the upper part in the example of FIG. 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.

Now, in the reforming reactor 2 in the example of FIG. 1, the tar vapor E in the product gas D which is supplied from the lower part and is directed to the upper part is supplied from the upper part and is directed toward the lower part. At this point, it is adsorbed, supported 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 its calorific value is LHV, for example, 6,700 kJ / Nm ³ (1,600 kcal). / Nm ³ ) or more.
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. In the example of FIG. 1, the product gas D (tar vapor E) may be accompanied by the carbide particles C supplied from the pyrolysis furnace 1 to the reforming reactor 2. As a countermeasure, for example, a double slide gate valve or a char intermediate hopper may be provided in the pipe line between the pyrolysis furnace 1 and the reforming reactor 2 as shown in the figure.
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, (1) the coking reaction of tar on the surface of the carbide grains C, (2) the steam reforming reaction of coke and carbide grains C, and (3) the partial combustion reaction of coke and carbide grains C Occurring and combining these reactions, tar is converted into fuel gas (reformed gas G in FIG. 1).
First, in the tar coking reaction on the surface of the carbide grains C, the tar vapor E is adsorbed on the surface of the carbide grains C and decomposed into coke (C) and hydrogen as shown in the following chemical formula 1. At this time, the coke (C) becomes a part of the carbide grains C.
Next, in the steam reforming reaction of coke and carbide grains C, the carbide grains C react with steam to generate hydrogen and carbon monoxide as shown in Chemical Formula 2 below.
Next, in the partial combustion reaction of coke and carbide grains C, the carbide grains C react with oxygen to generate carbon monoxide, as shown in Chemical Formula 3 below.
As described above, since the reforming reactor 2 can efficiently convert tar into fuel gas, the fuel gas obtained from the reforming reactor 2 (reformed gas G) has trouble caused by tar. It can be used directly as fuel for the engine 3 without causing it.

Further, in the reaction formula of Chemical Formula 2, the enthalpy of the system of carbon and water vapor increases when high temperature is applied, and is gasified into a mixed gas of carbon monoxide and hydrogen by endothermic reaction, but the amount of generated hydrogen is minimal. .
On the other hand, in the above reaction formula (4), 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 reaction formula of chemical formula 4, carbon monoxide generated in the chemical formula of chemical formula 2 reacts with water vapor by the following shift reaction of chemical formula 5, which is an exothermic reaction, and is reformed and converted to carbon dioxide and hydrogen. . When the following reaction formula 5 is added to the chemical formula 2, the chemical formula 4 is obtained.

In the reforming reactor 2, steam reforming proceeds according to the reaction formula 2 when the chemical shift reaction does not occur, and according to the chemical reaction formula 4 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 4 according to the degree of occurrence of the Chemical Reaction 5 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 4, so that the higher the temperature, for example, about 850 ° C., the chemical formula 2 Therefore, the shift reaction of Chemical formula 5 can be suppressed. On the other hand, for example, when the temperature is about 800 ° C., the shift reaction of Chemical Formula 5 is likely to occur, and the reaction of Chemical Formula 4 is likely to occur.
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, generation of tar vapor E from the woody biomass A is completed based on the temperature range of about 450 ° C. to 650 ° C.

(3) Then, in the reforming reactor 2 in the example of FIG. 1, the carbide grains C obtained in the pyrolysis furnace 1 are supplied from the upper part, and the product gas D is supplied from the lower part.
The reforming reactor 2 is heated to 700 ° C. or more, preferably 700 ° C. to 900 ° C. by adding the heat of partial combustion of the internal combustion method by introducing air F to the concentration of the product gas D supplied in this way. Is done.

(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 particles C and coked, and then the carbide particles C and the coke are heated at a high temperature. Below, it reacts with the water vapor in the product gas D, so that it is steam reformed to hydrogen, carbon monoxide, methane or the like.
For steam reforming, steam in the product gas D is used, but steam may be supplied separately if it is insufficient.

  (5) Further, in the reforming reactor 2, the carbide particles C and coke are converted into hydrogen and carbon monoxide by partial combustion, and the product gas D is a reformed gas G with increased fuel components and increased calories. Thus, the fuel is 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.

(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.

(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, methane, etc., and is reliably reduced and removed.

(9) In addition, this reforming system has a system arrangement in which the pyrolysis furnace 1, the reforming reactor 2, and the engine 3 are associated with each other, and the overall configuration is simple and the size is reduced. At the same time, processing operations and maintenance are easy and easy.
The operation of the present invention is as described above.

<< Example of Fig. 2 >>
The reforming system of the present invention has been described above mainly with reference to the example shown in FIG. 1, but the present invention is not limited to the example of FIG. For example, the example shown in FIG. 2 is also possible.
That is, in the example of FIG. 1, with respect to the reforming reactor 2, carbide particles C are supplied from the upper part, and product gas D (tar vapor E) is supplied from the lower part, and air F for partial combustion is also introduced. Therefore, the reformed gas G was discharged from the upper part.
On the other hand, in the example of FIG. 2, with respect to the reforming reactor 2, carbide particles C and product gas D (tar vapor E) are supplied from above, and air F for partial combustion is supplied from below the upper part. Thus, the reformed gas G is discharged from the lower part. In the example of FIG. 2, other configurations, functions, operations, and the like are the same as those described above with reference to the example of FIG.
The example in Figure 2 looks like this

BRIEF DESCRIPTION OF THE DRAWINGS It is used for description of the best form for implementing invention about the modification | reformation system of the woody biomass gas which concerns on this invention, and is the structure flowchart of the example. It is for the description of the best form for implementing this invention, and is a structure flowchart of another example.

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 particles 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 to hydrogen, methane, carbon monoxide, 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 heat of partial combustion by air introduction to sensible heat of the product gas itself supplied from the pyrolysis furnace. , Maintained in a temperature range of 700 ° C. or higher,
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
Based on such contact, the produced gas containing the tar steam is steam-reformed, and becomes the reformed gas and is discharged from the upper part of the reforming reactor. Reforming system. 2. The wood biomass gas reforming system according to claim 1, wherein the pyrolysis furnace is heated to a temperature of about 450 ° C. or more and 650 ° C. or less using high-temperature exhaust gas from the engine. Pyrolyzing the other woody biomass,
Thus, the produced gas is produced together with carbide grains, etc., and the produced gas is mainly composed of hydrogen, carbon monoxide, carbon dioxide, water vapor, nitrogen and the like, and contains the tar vapor. Biomass gas reforming system.   The reforming system for woody biomass gas 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, A wood biomass gas reforming system characterized in that the tar vapor is not generated from the carbide grains 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 a rotary engine, and the reformed gas is supplied through a dust removal facility, and is operated using hydrogen, carbon monoxide, and the like in the reformed gas as a main fuel. Woody biomass gas reforming system.

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