JP2006111768A - Operation method of waste gasification device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove economically and efficiently sulfur compounds such as hydrogen sulfide and carbonyl sulfide from formed gas obtained by gasifying waste under a reduced atmosphere. <P>SOLUTION: The method of operating a waste gasification device which gasifies and reforms the waste under the reduced atmosphere, comprises the steps of removing at least carbonyl sulfide from the formed gas after removing hydrogen sulfide from the gas formed by the gasification and reformation; and introducing sulfur and/or a sulfur compound obtained by the removal into a gasification part of the waste gasification device and/or into a high temperature part in front and in rear of it. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for operating a waste gasification processing apparatus, and more specifically, to operate a waste gasification processing apparatus for removing carbonyl sulfide from a gas containing carbonyl sulfide generated in the waste gasification processing apparatus. Regarding the method.

  Since the gas generated in the gasification treatment of waste contains a sulfur component such as carbonyl sulfide which is a harmful component, carbonyl sulfide is conventionally removed from these gases.

There are two methods for removing carbonyl sulfide: the dry method and the wet method, but the wet method is complicated and the process may be economically disadvantageous depending on the amount of gas to be treated. Has been.
Examples of the dry method include a molecular sieve, an adsorption method using an adsorbent, an absorption method using an absorbent, and a catalyst method in which carbonyl sulfide is hydrolyzed using a catalyst.

In Patent Document 1, using a catalyst in which potassium carbonate and / or sodium carbonate is supported on alumina, a gas containing carbonyl sulfide is brought into contact with the catalyst and carbonyl sulfide is hydrolyzed to hydrogen sulfide by the following reaction. The conversion is described.
COS + H ₂ O → H ₂ S + CO ₂

  In Patent Document 2, when carbonyl sulfide contained in a gas is hydrolyzed using a catalyst, sulfur dioxide and sulfur trioxide contained in the treatment gas poison the catalyst, and long-term operation becomes difficult. Therefore, in the method of hydrolyzing and removing carbonyl sulfide in a gas containing sulfur dioxide and sulfur trioxide in the presence of a hydrolysis catalyst, sulfur dioxide which hydrolyzes carbonyl sulfide after removing sulfur dioxide and sulfur trioxide. A method for removing the carbonyl is described.

  In Patent Document 3, in the hydrolysis reaction using a carbonyl sulfide (COS) catalyst, when excessive water vapor is supplied, moisture is condensed in the pores serving as the active sites of the COS catalyst, and the performance as a catalyst is described. In view of the problem that the hydrolysis reaction is lowered, when the catalytic performance of the COS conversion catalyst is lowered, the bypass gas is opened to flow the generated gas to the bypass, and air or an inert gas is supplied to the COS converter. There is described a gas purification device which can improve the catalytic performance of the COS conversion catalyst by supplying.

Patent Document 4 discloses a carbonyl sulfide hydrolysis catalyst in which potassium carbonate and / or sodium carbonate is supported on alumina for the purpose of improving the durability and extending the life of the carbonyl sulfide hydrolysis catalyst. Describes a catalyst for hydrolysis of carbonyl sulfide having a pore diameter of 3 to 30 nm and a pore volume of 0.3 cm ³ / g or more.

In Patent Document 5, the fuel gas obtained by gasifying and melting waste contains hydrogen chloride in addition to carbonyl sulfide, and the catalyst is a carbonyl sulfide catalyst in which potassium carbonate is supported on alumina. Hydrolysis of carbonyl sulfide which hydrolyzes carbonyl sulfide in the gas by bringing a gas containing carbonyl sulfide and hydrogen chloride into contact with a catalyst in which cesium carbonate is supported on alumina, because it greatly affects the hydrolysis activity. A method is described.
However, even if the above-described conventional method is applied to purify the gas generated in the gasification treatment of waste, there is a problem that the catalyst activity is lowered and stable operation cannot be performed.

In Patent Document 6, in a coal gasification reforming method, steam, hydrogen, and carbon monoxide are allowed to act on pulverized coal in the presence of a catalyst in a gasification unit to produce methane (CH ₄ ), carbon dioxide (CO ₂ ), generating a gas mixture containing carbon monoxide (CO), hydrogen (H ₂ ) and sulfur compounds (hydrogen sulfide (H ₂ S), carbonyl sulfide (COS)), from which the carbon dioxide, After removing hydrogen sulfide and carbonyl sulfide with an acid gas absorption unit, methane is separated with a cryogenic separation unit, a part of the remaining gas (H ₂ + CO) is extracted as a product, and the remainder is returned to the gasification unit, On the other hand, a coal gasification reforming method is described in which the separated methane is mixed with water in a reforming unit and the methane is reformed into a gas mixture containing methane, carbon dioxide, carbon monoxide and hydrogen. It is listed.
However, this method uses an acid gas absorption unit to remove sulfur compounds, but carbonyl sulfide is not sufficiently removed and remains in the products methane, carbon monoxide, and hydrogen, and the product There is a problem that this carbonyl sulfide poisons the catalyst when a compound such as methanol (CH ₃ OH) or dimethyl ether (DME: CH ₃ OCH ₃ ) is produced by catalytic reaction.

In Patent Document 7, in a method of gasifying and melting waste, a crude synthesis gas generated in a high-temperature reactor is guided to a cleaning cooling chamber, and water is injected into the crude synthesis gas to a temperature of 150 ° C. to 200 ° C. After quenching, carbonyl sulfide (COS) contained in the syngas is hydrolyzed and converted into hydrogen sulfide (H ₂ S) (COS + H ₂ O → CO ₂ + H ₂ S). After quenching to 90 ° C or less by water cooling, dioxins are prevented from being generated by removing hydrogen sulfide present in the crude synthesis gas using iron chelate in the next gas purification stage, and does not contain sulfur A method for obtaining synthesis gas is described. However, even if the above hydrolysis reaction is carried out without using a catalyst, carbonyl sulfide cannot be sufficiently converted to hydrogen sulfide, and carbonyl sulfide remains in the product, so that the catalyst is covered in the same manner as described above. There is a problem of poisoning.

JP-A-2-276891 JP-A-5-115747 JP 2000-212581 A JP 2002-224572 A JP 2002-292241 A JP 57-14691 A Special table 2003-522020 gazette

  The present invention relates to a waste gasification apparatus for removing sulfur compounds such as hydrogen sulfide and carbonyl sulfide from a product gas obtained by gasifying waste in a reducing atmosphere so that it can be used as an industrial gas. The purpose is to provide a method of operation.

As a result of intensive studies to solve the above-described problems of the prior art, the present inventors have removed hydrogen sulfide from the product gas generated by gasification, and then the sulfur compound (carbonyl sulfide) remaining in the product gas. Etc.) and returning the removed sulfur compound to the furnace, the present inventors have found that the sulfur compound can be efficiently removed, and have reached the present invention.
That is, the present invention has the following configuration.

(1) A method for operating a waste gasification processing apparatus for gasifying and reforming waste in a reducing atmosphere, wherein after removing hydrogen sulfide content in a product gas generated by the gasification and reforming, At least carbonyl sulfide is removed from the product gas, and sulfur and / or a sulfur compound obtained by the removal is introduced into a gasification section of the waste gasification apparatus and / or a high-temperature section before and after the gasification section. Operation method of waste gasification processing equipment.
(2) The above described (1), wherein the ratio of hydrogen and carbon monoxide in the product gas obtained by removing the carbonyl sulfide is kept constant and used as an industrial gas. Operation method of waste gasification processing equipment.
(3) The waste gasification according to (1) or (2) above, wherein the method for removing the carbonyl sulfide is a method in which the product gas is brought into contact with cold methanol to absorb the carbonyl sulfide in methanol. Operation method of treated carbonyl sulfide chamber.
(4) The above (3), wherein the methanol is methanol produced when hydrogen and carbon monoxide in a product gas obtained by removing the carbonyl sulfide are used as industrial gases. Method of waste gasification processing equipment.
(5) The method for operating a waste gasification apparatus according to any one of (1) to (4) above, wherein the waste is biomass, wood chips, or general or industrial waste.

(6) The method for operating a waste gasification apparatus according to any one of (1) to (5) above, wherein an oxygen-containing gas is used as a combustion aid.
(7) The waste gasification processing apparatus according to (6) above, wherein the control of the gas amount of the generated gas generated by the waste gasification processing apparatus is performed by controlling the blowing amount of the auxiliary combustor. Operation method.
(8) The method for operating a waste gasification apparatus according to (6) or (7) above, wherein the oxygen-containing gas is pure oxygen.
(9) The waste gasification apparatus according to any one of (6) to (8) above, wherein at least one selected from reforming steam, moisture, and carbon dioxide is added to the product gas in a high temperature state. Operation method.
(10) A method of operating a composite apparatus comprising a waste gasification processing apparatus for gasifying and reforming waste in a reducing atmosphere and a fuel production apparatus using a generated gas of the waste gasification processing apparatus as a raw material. Then, after removing the hydrogen sulfide content in the product gas generated by the gasification reforming, at least carbonyl sulfide is removed from the sulfur and sulfur compounds remaining in the gas, and the sulfur and / or obtained by the removal are removed. Alternatively, a sulfur compound is introduced into the gasification section of the waste gasification treatment apparatus and / or the high-temperature section before and after the gasification section.

(11) The method for operating a composite apparatus according to (10), wherein water vapor and / or carbon dioxide recovered in the fuel production apparatus is used as a reformed gas in a waste gasification processing apparatus.
(12) The method for operating a waste gasification apparatus according to (10) or (11) above, wherein the fuel production apparatus is a DME production apparatus.
(13) A waste gasification apparatus for gasifying and reforming waste in a reducing atmosphere, the apparatus for removing hydrogen sulfide in a product gas generated by the gasification and reforming, and the hydrogen sulfide An apparatus for removing at least carbonyl sulfide from the product gas after removing the component, and the sulfur and / or sulfur compound obtained by the removal of the gasification section of the waste gasification apparatus and / or a high temperature around it A waste gasification processing apparatus characterized by comprising at least a device to be introduced into the section.
(14) A device that supplies an oxygen-containing gas as a combustion aid, and a cooling device that cools the generated gas containing hydrogen and carbon monoxide generated by the gasification, The waste gasification processing apparatus according to (13), wherein means for adding at least one selected from steam for reforming, moisture and carbon dioxide is provided.
(15) A composite apparatus comprising the waste gasification processing apparatus according to (14) above and a fuel production apparatus using a product gas of the waste gasification processing apparatus as a raw material.

According to the present invention, carbonyl sulfide contained in a product gas obtained by gasifying waste can be removed economically and efficiently, and the product gas obtained by gasifying the waste is converted to dimethyl ether (DME: It can be effectively used as industrial raw material gas for producing CH ₃ OCH ₃ ), hydrogen fuel and the like.
So

A basic configuration of a waste gasification processing apparatus to which the operation method of the present invention is applied will be described based on the gasification reforming apparatus shown in FIG.
The gasification reforming system consists of the following processes.
1. Press / degas channel (1) Waste compression, (2) Drying and pyrolysis 2. High-temperature reactor / homogenization furnace (3) Gasification and melting, (4) Slag homogenization, (5) Gas reforming Gas purification (6) Gas quenching (quenching, acid cleaning, acid cleaning), (7) Gas purification (alkali cleaning, desulfurization, dehumidification)
4). Water treatment (8) Water treatment (precipitation, desalination, etc.)
5. Use of gas (9) Use of power generation of gas

This method will be described along the flow as follows.
Wastes such as municipal waste are compressed by a press machine, and then heated and distilled by indirect heating in a dry pyrolysis process and sent into a high temperature reactor. A burner is disposed at the lower part of the high-temperature reactor, and fuel gas and oxygen are introduced into the furnace by the burner, and the oxygen gas gasifies carbon in the dry distillate to produce carbon monoxide and carbon dioxide. In addition, when high-temperature steam is present, a water gasification reaction occurs between carbon and steam to generate carbon monoxide and hydrogen. Further, the organic compound is thermally decomposed to generate carbon monoxide and hydrogen. As a result of the above reaction, crude synthesis gas is recovered from the top of the high temperature reactor.
The crude synthesis gas recovered from the high temperature reactor is rapidly cooled from about 1200 ° C. to about 70 ° C. by injecting circulating water in the cooling tower to prevent resynthesis of dioxins.

The crude synthesis gas cooled in the cooling tower is washed with acidic water in the acid washing tower, and heavy metal components such as Pb and chlorine contained in the crude synthesis gas are dissolved in the washing liquid. The acid-washed synthesis gas is washed with water in an alkali washing tower to remove residual chlorine (deHCl), and desulfurized (removal of inorganic sulfur with iron chelate: dehydrogenation H ₂ S) in a desulfurization tower. Fuel gas.
This recovered gas is desulfurized with respect to H ₂ S by iron chelate. However, since COS remains, when operating the engine as fuel gas, de-COS may be necessary as a condition for complying with the flue gas SOX regulations.

In the operation method of the present invention, sulfur compounds such as COS are further removed from the product gas after removal of hydrogen sulfide, and sulfur and / or sulfur compounds such as COS obtained by the removal are returned to the gasification reforming furnace. There is a feature in the point.
Normally, when a reactant from a certain reaction system is returned to the reaction system, the reactant accumulates and increases in the circulation system.

However, when waste is gasified in a reducing atmosphere, it can be seen from various experiments that a reaction equilibrium as shown in the following formula (1) holds in a pseudo manner, and COS is reduced by the reaction equilibrium. It turns out that the H ₂ S: COS ratio in the gas generated from the furnace becomes a constant ratio (H ₂ S: COS ratio = 10: 1 to 30: 1) depending on the gas reforming temperature even if it is returned to the furnace. did.

Incidentally, at a reforming temperature of about 1200 ° C., H ₂ S: COS≈20: 1.
That is, even when returning the COS to the furnace, the majority is converted to H _{2 S,} it was found to be removed by H 2 _S removal device

Therefore, for example, by installing a COS removal process normally used in chemical engineering after the H ₂ S removal process in the generated gas and returning the COS removed in the process to the furnace again, the gas after the COS removal process It is achieved that the sulfur concentration in the medium is reduced and all the sulfur content generated is removed in the H ₂ S removal process.
The details of the present invention will be described based on the flow sheet of FIG. FIG. 2 shows an example in which a process for absorbing and removing COS using methanol as an absorbing solution is used as the COS removing process, but other processes can also be used as the COS removing process.

  The waste is charged into a high temperature reactor of a waste gasification processing apparatus and subjected to gasification reforming treatment. The product gas that has been gasified and reformed is subjected to a rapid cooling / acid washing step and an alkali washing step, and is treated with an oxidation catalyst solution such as iron chelate in a hydrogen sulfide removal step to be removed as elemental sulfur. The product gas from which hydrogen sulfide has been removed is pressurized and then contacted with methanol in the COS removal process to absorb and remove COS gas. Then, COS is released from the methanol in the COS release process, and this COS is returned to the gasification reforming furnace. To do. The returned COS is converted into hydrogen sulfide by the equilibrium reaction of the formula (1) in the gasification reforming furnace, and is removed by the hydrogen sulfide removal step.

The outline of the process of absorbing and removing COS using methanol is as follows.
(1) The gas to be treated is brought into contact with cold methanol in the first absorption tower to absorb most of the carbon dioxide.
(2) The gas exiting the first absorption tower is brought into contact with cold methanol in the second absorption tower to absorb carbon dioxide, carbonyl sulfide and residual hydrogen sulfide.
A cooling coil using a refrigerant such as ammonia is provided in the towers of the first and second absorption towers to remove absorbed heat.
(3) Methanol that has absorbed carbon dioxide, carbonyl sulfide and residual hydrogen sulfide is depressurized to atmospheric pressure, carbon dioxide, carbonyl sulfide and hydrogen sulfide are released, and methanol is further purified under vacuum to release carbon dioxide, Used again as an absorbent.

This methanol COS absorption process has the following characteristics.
a. Sulfur compounds such as hydrogen sulfide and carbonyl sulfide can be removed simultaneously with carbon dioxide and independently, and can be reduced to 0.1 ppm or less. B. Selective removal of sulfur compounds is possible c. A gas with low moisture is obtained d. The solvent is thermally and chemically stable and does not deteriorate e. No solvent foaming f. Less corrosive and carbon steel can be used g. The solvent is inexpensive. However, the process flow is complicated because it is operated at a low temperature in order to suppress methanol loss, and higher hydrocarbons are absorbed.

In the present invention, the atmosphere when the waste is gasified is a reducing atmosphere.
If the gasification atmosphere is an oxidizing atmosphere, the sulfur compound is converted to sulfur oxide and finally recovered in the form of gypsum, etc. However, if the gasification atmosphere is an oxidizing atmosphere, the sulfur compound is hydrogen sulfide. It can be recovered in the form of elemental sulfur.

As a method for obtaining elemental sulfur from hydrogen sulfide, techniques used for desulfurization of gas generated in a coke oven, for example, desulfurization with an oxidation catalyst solution such as Takahax, or removal with iron chelates such as SulFerox and Lo-Cat Can be mentioned.
Although these methods can remove hydrogen sulfide but cannot remove COS, a COS removal step is required as a subsequent step.

  As the COS removal step, a process using methanol as an absorption liquid can be preferably used. However, the carbonyl sulfide absorption reaction by methanol in this process has little absorption at normal temperature, and the vapor pressure of methanol in the absorption tower is high, Moreover, since there is much methanol outflow from an absorption tower, it is not efficient. By performing the absorption reaction at −30 ° C. or lower, preferably −40 ° C. or lower, the absorption efficiency of carbonyl sulfide is improved and the outflow of methanol is reduced, so that efficient carbonyl sulfide removal is possible.

In addition, when dimethyl ether is directly synthesized by the reaction of the following formula (2) using the product gas, methanol is by-produced by the side reaction of the following formula (3). It can be used as an absorbing solution.
When methanol is directly synthesized by the reaction of the following formula (3) using the product gas, methanol as a product can be used as an absorption liquid in an absorption process using methanol.

3CO + 3H ₂ → CH ₃ —O—CH ₃ + CO ₂ (2)
2H ₂ + CO → CH ₃ OH (3)

When returning the carbonyl sulfide released from methanol to the waste gasifier, it is preferably introduced into the gasification section of the furnace, or the high temperature section before and after the furnace, and charged into the inlet of the gas reforming section. More preferred. By introducing COS into the gas reforming section, the ratio of COS / H ₂ S becomes about 1/20 due to the equilibrium reaction of COS + H ₂ → H ₂ S + CO, and most of it is converted to hydrogen sulfide.

As described above, when an absorption process using methanol is used for removing COS, COS released from methanol can be introduced into the gasification reforming furnace as it is.
Further, when other processes are used for removing COS, COS may be converted into sulfur and / or a sulfur compound other than COS as a result of the removal treatment. In this case, the sulfur, Sulfur compounds can be introduced into the gasification reforming furnace. For example, when carbonyl sulfide is hydrogenated or hydrolyzed to be converted into hydrogen sulfide and then removed and recovered as iron sulfide with iron oxide, the iron sulfide may be introduced into a gasification reforming furnace. it can.
In the gasification reforming furnace, most of these sulfur or sulfur compounds are gasified to H ₂ S in a high-temperature atmosphere and removed in the hydrogen sulfide removal step.

When the product gas is used as a raw material for dimethyl ether or hydrogen fuel, which substitutes for gasoline, it is preferable to keep the H ₂ / CO ratio in the product gas after removing carbonyl sulfide at a constant value.
If this H ₂ / CO ratio is not a constant value, surplus H ₂ or CO will come out and the utilization efficiency of the fuel production process will be greatly reduced.
For example, in the case where DME is used for direct synthesis as a product gas, the reaction formula for directly synthesizing DME is as shown in the above formula (2), and the stoichiometric ratio of H ₂ / CO is 1. It is preferable.

The gas unreacted among the gas after combining the DME is preferably used as the raw material gas is circulated to remove the CO _2, for example, H 2 _/ CO ratio in excess of 1 hydrogen In the case of a surplus raw material, hydrogen is circulated and used, and hydrogen is surplus in the system, the ratio increases, and the conversion efficiency to DME decreases. Conversely, in the case of a raw material in which carbon monoxide is surplus when the H ₂ / CO ratio is less than 1, carbon monoxide becomes surplus in the system, and the conversion efficiency to DME decreases. If H ₂ / CO is not controlled to be constant, the amount of fuel produced is limited by the smaller molecular species, and the surplus gas species are wasted.

The industrial raw material gas obtained from the waste gasification processing apparatus of the present invention is preferably used as a raw material for the fuel production apparatus, and may be a combined apparatus combining the waste gasification processing apparatus and the fuel production apparatus. It is an aspect of the present invention. By making fuel that can be easily transported from waste, such as DME and methanol, the use will be expanded and CO ₂ will be reduced.
In addition, by using a composite device, there is an advantage that methanol produced as a by-product when DME is produced and methanol produced by methanol production can be used as an absorbing solution in the COS removal step.

[Comparative Example 1]
A gas mainly composed of hydrogen and carbon monoxide was recovered from a gasification reforming furnace using a mixture of wood waste and waste plastic as a raw material. The reforming temperature was set to 1200 ° C. by supplying oxygen. Hydrogen sulfide in the resulting crude product gas was converted to sulfur by iron chelate. Next, after dust removal, in order to remove carbonyl sulfide from the crude product gas, the temperature is raised using steam, carbonyl sulfide is converted to hydrogen sulfide using a hydrolysis catalyst, and after cooling, hydrogen sulfide is removed. Further, hydrogen sulfide was converted to sulfur by iron chelate and removed to remove dust. The obtained gas was pressurized and dimethyl ether was produced at a sulfur compound concentration of 0.1 ppm or less using an adsorbent. The apparatus was complex and required a large amount of water vapor to raise the temperature.

[Example 1]
The waste was processed by the process shown in the flow sheet of FIG.
First, a gas mainly composed of hydrogen and carbon monoxide was recovered from a gasification reforming furnace using a mixture of wood chips and waste plastic as a raw material. The reforming temperature was set to 1200 ° C. by supplying oxygen. Hydrogen sulfide in the resulting crude product gas was converted to sulfur by iron chelate and removed, and after the pressure was increased, carbonyl sulfide was removed using methanol by-produced during the production of dimethyl ether. The removed carbonyl sulfide was charged into a gasification reforming furnace (without going through a separate conversion step to hydrogen sulfide). Dimethyl ether was produced from the obtained gas. Compared to Comparative Example 1, the apparatus was simple and operation was easy.

  Since the method of the present invention can economically and efficiently remove carbonyl sulfide contained in a product gas obtained by gasifying waste, the product gas obtained by gasifying the waste is converted to dimethyl ether or hydrogen. It can be effectively applied as a raw material gas for efficiently producing fuel.

It is a figure explaining the outline of the gas purification process of the gasification reforming processing apparatus of a waste. It is a figure explaining the operation method of this invention.

Claims (15)

  An operation method of a waste gasification processing apparatus for gasifying and reforming waste in a reducing atmosphere, wherein after removing hydrogen sulfide content in the product gas generated by the gasification and reforming, from the product gas Waste gas characterized by removing at least carbonyl sulfide and introducing sulfur and / or a sulfur compound obtained by the removal into a gasification section of the waste gasification apparatus and / or a high temperature section before and after the gasification section Of operation of chemical treatment equipment.   The waste gasification according to claim 1, wherein the ratio of hydrogen and carbon monoxide in the product gas obtained by removing the carbonyl sulfide is kept constant and used as an industrial gas. How to operate the processing equipment.   The method for removing the carbonyl sulfide is a method in which the produced gas is brought into contact with cold methanol so that the carbonyl sulfide is absorbed by the methanol. Operation method.   The waste gas according to claim 3, wherein the methanol is methanol produced when hydrogen and carbon monoxide in a product gas obtained by removing the carbonyl sulfide are used as industrial gases. Of operation of chemical treatment equipment.   The method for operating a waste gasification apparatus according to any one of claims 1 to 4, wherein the waste is biomass, wood chips, or general or industrial waste.   The operation method of the waste gasification processing apparatus according to any one of claims 1 to 5, wherein an oxygen-containing gas is used as a combustion aid.   The operation method of the waste gasification processing apparatus according to claim 6, wherein the gas amount of the generated gas generated by the waste gasification processing apparatus is controlled by controlling the amount of blowing of the auxiliary combustion agent.   The method for operating a waste gasification apparatus according to claim 6 or 7, wherein the oxygen-containing gas is pure oxygen.   The method for operating a waste gasification apparatus according to any one of claims 6 to 8, wherein at least one selected from steam for reforming, moisture and carbon dioxide is added to the product gas in a high temperature state. .   A method for operating a composite apparatus comprising a waste gasification processing device for gasifying and reforming waste in a reducing atmosphere and a fuel production device using a product gas of the waste gasification processing device as a raw material, After removing hydrogen sulfide in the product gas produced by gasification reforming, at least carbonyl sulfide is removed from sulfur and sulfur compounds remaining in the gas, and sulfur and / or sulfur compounds obtained by the removal Is introduced into the gasification section of the waste gasification processing apparatus and / or the high-temperature section before and after the gasification section.   11. The method of operating a composite apparatus according to claim 10, wherein water vapor and / or carbon dioxide recovered in the fuel production apparatus is used as a reformed gas in a waste gasification processing apparatus.   12. The method for operating a waste gasification apparatus according to claim 10, wherein the fuel production apparatus is a DME production apparatus.   A waste gasification processing apparatus for gasifying and reforming waste in a reducing atmosphere, the apparatus for removing hydrogen sulfide in the product gas generated by the gasification reforming, and removing the hydrogen sulfide A device for removing at least carbonyl sulfide from the product gas after the removal, and introducing sulfur and / or sulfur compound obtained by the removal into the gasification section of the waste gasification treatment apparatus and / or the high-temperature section before and after the gasification section A waste gasification processing apparatus characterized by comprising:   A device for supplying an oxygen-containing gas as a combusting agent and a cooling device for cooling a product gas containing hydrogen and carbon monoxide produced by the gasification are used for reforming the product gas in a high temperature state before the cooling. 14. The waste gasification apparatus according to claim 13, further comprising means for adding at least one selected from steam, moisture and carbon dioxide.   15. A composite apparatus comprising the waste gasification apparatus according to claim 14 and a fuel production apparatus using the product gas of the waste gasification apparatus as a raw material.

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