Waste biomass gasification treatment device and waste biomass gasification treatment method

Abstract

The purpose is to reduce various costs including device manufacturing cost, energy cost and running cost by eliminating the need for a drying process of hydrolysis products caused by waste steam, a pellet forming process and a waste gas treatment process caused by the combustion of pellets. The present invention is a waste biomass gasification treatment device (1) for hydrolyzing raw materials including organic waste and gasifying biomass, comprising: a hydrolysis device (2); and a biomass gasification recovery device (3) for gasifying and recovering the hydrolyzed product biomass, the hydrolysis device (2) comprising: a treatment container (23) having a raw material input port (21) and a product discharge port (22); a stirring unit arranged inside the treatment container (23) for stirring the raw material; a steam supply pipe (24) for supplying steam to the treatment container (23); and a steam exhaust pipe (26) for exhausting steam from the treatment container (23).

Description

Technical Field

[0001] The invention relates to a waste gasification treatment device, a waste gasification treatment system and a waste gasification treatment method. Background Art

[0002] The invention of Patent Document 1 is a method for producing a product by hydrolyzing raw materials including plant waste with steam to produce a product, characterized in that it includes: a hydrolysis treatment step of hydrolyzing the raw materials with steam; a washing step of washing the hydrolyzed raw materials with a washing liquid; and a separation step of separating the washed raw materials into a solid component and a liquid component, and using at least one of the solid component or the liquid component as the product. It includes: a drying step of drying the solid component; and a forming step of granulating the solid component to produce biomass fuel from the solid component.

[0003] The invention of Patent Document 2 is a hydrolysis treatment device for hydrolyzing raw materials including organic waste, comprising: a treatment container having a raw material input port and a product discharge port; a stirring unit, which is arranged inside the above-mentioned treatment container and stirs the raw materials; a steam supply piping, which supplies steam to the above-mentioned treatment container; and a steam exhaust piping, which discharges steam from the above-mentioned treatment container, and the above-mentioned treatment container has multiple steam supply ports.

[0004] Patent Document 1: Japanese Patent No. 6190082

[0005] Patent Document 2: Japanese Patent No. 6409237

[0006] However, in the product production method described in Patent Document 1 and the hydrolysis treatment device described in Patent Document 2, solid components or liquid components obtained by hydrolyzing waste are used, so solid-liquid separation is required to separate solid components and liquid components. Patent Documents 1 and 2 mainly focus on the use of solid components, and require a drying process and a particle forming process for hydrolyzing solid components. Therefore, there are problems to be solved, such as the equipment manufacturing cost and energy cost of the process are extremely large, the processing time of the process becomes long, and the waste gas pollution prevention treatment is required due to the combustion of solid components. Summary of the invention

[0007] The present invention has been completed in view of the above problems, and its purpose is to reduce various costs such as device manufacturing cost, energy cost and running cost by eliminating the need for a drying process of hydrolysis products caused by waste steam, a particle forming process and a waste gas treatment process caused by the combustion of particles.

[0008] The present invention is a waste biomass gasification treatment device, characterized in that it is equipped with: a hydrolysis device; a solid-liquid separation device, which performs solid-liquid separation of the hydrolyzed raw material to obtain a product with a moisture content of 70% to 90%; and a biomass gasification recovery device, which gasifies the above-mentioned product biomass and recovers the generated biomass gas; the above-mentioned hydrolysis device has: a processing container, which has a raw material input port and a product discharge port; a stirring unit, which is arranged inside the above-mentioned processing container and stirs the raw material; a steam supply piping, which supplies steam to the above-mentioned processing container; and a steam exhaust piping, which discharges steam from the above-mentioned processing container.

[0009] In addition, the present invention is a method for gasifying waste biomass, characterized by comprising: a raw material input step, in which raw materials including organic waste are input into a processing container; a hydrolysis treatment step, in which the raw materials are hydrolyzed by steam; a solid-liquid separation step, in which the raw materials hydrolyzed in the hydrolysis treatment step are separated into solid and liquid to obtain a product with a moisture content of 70% to 90%; and a biomass gasification recovery step, in which the product biomass is gasified and recovered, wherein in the hydrolysis treatment step, the internal pressure of the processing container is set to 1.2MPa to 3.0MPa, the processing temperature is set to 189 to 234°C, and the holding time from the processing temperature reaching the target temperature range is set to 10 minutes to 2 hours. Preferably, before the solid-liquid separation step, a washing step is further included for washing the raw materials hydrolyzed in the hydrolysis treatment step.

[0010] It can also be a waste gasification treatment system including a hydrolysis treatment device, a biomass gasification recovery device, and a biomass boiler that uses organic matter as fuel to generate steam. The biomass boiler will use the product that has been hydrolyzed in the hydrolysis treatment device as the fuel by drying it to a water content of less than 20%.

[0011] The biomass boiler may include a fuel supply port for supplying the fuel, and the fuel supply port may be connected to an outlet of a drying device for drying the product.

[0012] The waste biomass gasification treatment method of the present invention comprises: a raw material input step, after the above-mentioned raw materials are input into the treatment container, the above-mentioned treatment container is made into a sealed state; a pressurization and temperature increase step, steam is supplied to the above-mentioned treatment container from multiple positions to pressurize and increase the temperature; a temperature maintenance step, after the inside of the above-mentioned treatment container reaches the target temperature range, the temperature is maintained; a steam exhaust step, after the above-mentioned pressurization and temperature increase step and the temperature maintenance step, the steam inside the above-mentioned treatment container is exhausted; a product discharge step, discharges the above-mentioned raw materials that have been hydrolyzed inside the above-mentioned treatment container as a product; and a biomass gasification recovery step, gasifies the product biomass and recovers the generated biomass gas.

[0013] Preferably, the raw material in the processing container is stirred by a stirring unit when the raw material is added into the processing container, when the temperature in the processing container is increased, and when the temperature in the processing container reaches a target temperature range and is maintained.

[0014] According to the present invention, since the drying process of the hydrolysis product caused by the steam of the waste, the pellet forming process, and the treatment of the exhaust gas caused by the combustion of the pellets are not required, various costs such as the manufacturing cost of the device, the energy cost, and the running cost can be reduced. In addition, the generated biomass gas can be used to generate electricity. In addition, the decomposition temperature during hydrolysis is low, and the temperature holding time (decomposition time) is extended, so that the carbonization of the waste that hinders the gasification of biomass can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a configuration diagram of a waste biomass gasification treatment device according to an embodiment of the present invention.

[0016] Figure 2 This is a flow chart of a waste biomass gasification treatment method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0018] The waste biomass gasification treatment device 1 of the product involved in the embodiment of the present invention comprises: a hydrolysis device 2, which hydrolyzes raw materials including organic wastes with steam to produce products; a biomass gasification recovery device 3, which receives the products decomposed in the hydrolysis device 2 and gasifies the biomass to recover the generated biomass gas; a boiler 4, which supplies steam to the hydrolysis device 2; a condenser 5, which removes the steam pressure of the hydrolysis device 2; and a control device 6, which controls the pressure and temperature of the hydrolysis device 2. According to the needs of various situations such as the raw materials, it is equipped with: a moisture content adjustment device; a cleaning device (not shown in the figure) to clean the hydrolyzed raw materials with a cleaning liquid; and / or a solid-liquid separation device (not shown in the figure) to separate the cleaned raw materials into solid components and liquid components.

[0019] The hydrolysis device 2 hydrolyzes the raw material to produce a product for biomass gasification treatment, and comprises: a processing container 23, having a raw material input port 21 and a product discharge port 22; a stirring unit, which is arranged inside the processing container 23 and stirs the raw material; a steam supply pipe 24, which supplies steam to the processing container 23; a plurality of steam supply ports 25, which supply steam from the steam supply pipe 24 to the processing container 23; and a steam exhaust pipe 26, which discharges steam from the processing container 23.

[0020] The processing container 23 is horizontal, but sometimes vertical. The raw materials for waste biomass gasification treatment include organic wastes such as aquatic product residues, various sludges, agricultural crops and agricultural product residues, beverage residues, and urban garbage. It is preferred to use a crushing unit (not shown) to crush the raw materials into sizes of less than 100 mm on each side. The crushing unit can be a known crushing unit, but in the case of soft waste such as aquatic product residues as the raw material, a single-axis rotary crushing unit is preferred.

[0021] Alternatively, a single amount of crushed raw materials matching the internal volume of the processing container 23 of the waste biomass gasification treatment device 1 may be measured and temporarily stored in a raw material input silo (not shown). The internal volume of the raw material input silo (not shown) depends on the internal volume of the processing container 23, and is usually 1.1 to 1.2 times the internal volume of the processing container 23. When storing raw materials containing acidic and alkaline substances such as fishery processed product residues, it is preferred that the raw material input silo is formed of a corrosion-resistant material.

[0022] Since the processing container 23 is supplied with high-pressure steam from a steam supply port 25 described later, it is necessary to meet the requirements of a Class 1 pressure vessel. Therefore, the internal volume, diameter, plate thickness, and material of the processing container 23 are designed within the range of the requirements of a Class 1 pressure vessel according to the amount of raw materials.

[0023] The higher the pressure resistance of the processing container 23, the better. However, considering practicality and economy, it is usually 2 MPa to 10 MPa, preferably 3 MPa to 8 MPa.

[0024] The hydrolysis device 2 usually performs hydrolysis treatment on the raw material under high temperature, high pressure, strong acidity or strong alkalinity. The processing container 23 is preferably formed by lining the inner side of the pressure-resistant structure with a thin plate of chemical-resistant stainless steel (SUS316), fluorine-based, silicone-based polymer material. Depending on the raw material to be treated, ordinary stainless steel (SUS304) can also be used.

[0025] The raw material inlet 21 is formed in the upper part of the processing container 23. If the raw material inlet 21 is formed on the side surface of the processing container 23, a stirring unit described later becomes an obstruction, and the input of the raw material becomes difficult.

[0026] The raw material input port 21 is connected to an openable and closable pressure-resistant valve 27. The pressure-resistant property of the pressure-resistant valve 27 is preferably equal to or higher than that of the processing container 23 in order to close the raw material input port 21 during the hydrolysis treatment.

[0027] The product discharge port 22 is formed at the lower portion of the processing container 23 .

[0028] The processing container 23 has a stirring unit (not shown) driven by a motor 28 to stir and mix the raw materials inside. The stirring unit can use a known stirring unit such as a paddle type or a screw type. The stirring unit can crush and mix the high-viscosity and high-weight raw materials inside the processing container 23 to make the raw materials uniform.

[0029] If the stirring unit (not shown) is a spiral type, the inner diameter of the processing container 23 is 100 cm and the total length is 250 cm, then the outer diameter of the stirring blade is preferably 95 cm to 98 cm, the pitch is 30 cm to 50 cm, and the blade shape is fan-shaped or paddle-shaped.

[0030] The rotation speed of the stirring unit is appropriately set in the range of 0.1 rpm to 50 rpm, preferably 0.5 rpm to 30 rpm, depending on the raw materials. The stirring unit (not shown) preferably places more emphasis on stirring torque than stirring speed in order to simultaneously pulverize and shear while stirring and mixing.

[0031] Preferably, the stirring by the stirring unit (not shown) starts at the same time as the input of the raw material. As for the stirring conditions, the start time and the completion time of the stirring operation are appropriately set according to the reaction time of the waste biomass gasification treatment device 1 and the state of the raw material. At this time, the stirring operation can be either continuous or intermittent. Preferably, the stirring operation controls the rotation direction by a timer in a manner that repeats forward and reverse rotation every specified time. If the stirring unit is rotated only in a constant direction, the raw material sometimes deviates to one side, and the crushing and mixing by stirring cannot be uniformly performed.

[0032] The structure for supplying steam to the inside of the processing container 23 and exhausting steam from the processing container 23 will be described. The processing container 23 has a plurality of steam supply ports 25 along the longitudinal direction of the processing container 23. The plurality of steam supply ports 25 are connected to a plurality of branch pipes (not shown) branched from the steam supply pipe 24 downstream of the control valve 29.

[0033] The control valve 29 controls the pressure inside the processing container 23 to a predetermined pressure, for example, 3 MPa, based on the pressure gauge 2a installed in the processing container 23. At this time, the temperature inside the processing container 23 is measured by the thermometer 2b. The processing container 23 is provided with a safety valve 2c to prevent failure of measuring instruments such as the pressure gauge 2a and various valves.

[0034] The boiler 4 is supplied with fuel from a fuel supply port 41. The capacity of the boiler 4 is set according to the internal volume of the processing container 23 and the temperature increase time.

[0035] The steam supply pipe 24 is connected to the boiler 4 via a control valve 29. The boiler 4 generates steam using organic matter as fuel, and has the ability to adjust the processing container 23 to a predetermined pressure (steam pressure) and temperature.

[0036] The exhaust of the steam from the processing container 23 may be performed to a condenser box filled with water 3 to 10 times the internal volume of the processing container 23 instead of using the condenser 5. The condenser box also functions as a pressure release unit that reduces the pressure of the exhausted steam (e.g., 3.0 MPa) to about normal pressure (0.1 MPa).

[0037] Steam can be uniformly supplied to the interior of the processing container 23, so that the temperature and pressure inside the processing container 23 can be uniform. By making the temperature and pressure inside the processing container 23 uniform, the hydrolysis treatment of the raw materials including organic waste can be uniformly performed, and the product can be homogenized.

[0038] The boiler 4 may be dedicated as in the present embodiment, but may be directly introduced if there is excess steam in the factory boiler and the steam meets the use conditions of the processing container 23. The boiler 4 may be provided in parallel with various types of boilers such as a through-flow boiler.

[0039] The processing container 23 has a plurality of steam exhaust ports 26a along the longitudinal direction of the processing container 23. The plurality of steam exhaust ports 26a are respectively connected to a plurality of branch pipes (not shown) having ball valves (not shown) and are gathered into the steam exhaust pipe 26.

[0040] A plurality of ball valves (not shown) adjust the flow rate or flow velocity of the steam from the processing container 23, and the openings are set automatically or manually. The exhaust of the steam from the processing container 23 also depends on the internal pressure, and for example, takes 5 to 60 minutes to decompress the interior of the processing container 23.

[0041] The condenser 5 is a cyclone separator that recovers condensate (condensed liquid and dust) from the exhausted steam. The condenser 5 may be a tangential cyclone separator, an axial cyclone separator, or a multi-cyclone separator formed by connecting cyclones in parallel or in series. In addition, if the periphery of the condenser 5 is heated, the condensed liquid is almost vaporized, so that dust (powdery solid matter) is recovered from the lower part of the condenser 5.

[0042] In addition to collecting the condensate, the condenser 5 also functions as a pressure release unit that reduces the pressure of the exhausted steam (eg, 3.0 MPa) to about 0.5 MPa. Therefore, the internal volume of the condenser 5 is set to 0.5 to 1.5 times the internal volume of the processing container 23 .

[0043] In the condenser 5, the steam after the condensate is recovered is directly discharged to the atmosphere, but if necessary, a deodorizer can be provided downstream of the condenser 5 to deodorize the exhaust steam and then discharge it to the atmosphere. The deodorizer can use a known deodorizer of an adsorbent type, and the adsorbent is preferably selected appropriately from activated carbon, lime, zeolite, etc. according to the components of the odor.

[0044] The biomass gasification recovery device 3 includes a product receiving port 31 and a biomass gas discharge port 32 for discharging the generated biomass gas.

[0045] The biomass gas generated by the biomass gasification recovery device 3 is used as (1) fuel gas for gas generators, (2) combustion fuel gas used in boilers, etc. The heat generated by the gas generator during power generation can also be used to generate steam for hydrolysis.

[0046] The method for producing a product according to an embodiment of the present invention is to hydrolyze raw materials including organic waste to produce a product, and the method comprises: a hydrolysis treatment step, in which the raw materials are hydrolyzed by steam; and a biomass gasification recovery step, in which the hydrolyzed product biomass is gasified and recovered. If necessary, it includes: a washing step, in which the hydrolyzed raw materials are washed with a washing liquid; and a solid-liquid separation step, in which the washed raw materials are separated into a solid component and a liquid component, so that the water content of the solid component is, for example, 80%, and the solid component is used as the above-mentioned product. As for the liquid, it is outside the scope of the present invention, so the description is omitted.

[0047] Reference Figure 2 A method for producing a product according to an embodiment of the present invention will be described.

[0048] (Raw material input step S100)

[0049] The appropriate range of the moisture content (mass basis: the same below) of the raw material is 40% to 80%, preferably 40% to 70%, and particularly preferably 40% to 60%. Generally, when the moisture content (mass basis: the same below) of the raw material is less than 40%, water is added, and when it exceeds 80%, the moisture is reduced. When the moisture content is less than 40%, water, waste water generated during hydrolysis, or concentrated water generated during steam degassing is added to the processing container 23 during hydrolysis to make the moisture content within the appropriate range (S200). When the moisture content exceeds 80% and the moisture is reduced, a moisture adjustment material can also be added to the processing container 23 from the raw material input port 21 simultaneously with the raw material. As the moisture adjustment material, it is preferred to use an adsorbent material that has water absorption and can adsorb harmful heavy metal ions dissolved in the hydrolysis treatment. The adsorbent is preferably an organic adsorbent. If it is an organic adsorbent, industrial waste can be used, and the organic adsorbent itself can also be hydrolyzed. Preferred organic adsorbents include sawdust, rice husks, wood chips, wheat straw, rice straw, etc. When inorganic adsorbents are used, preferred are slaked lime, zeolite, pumice, etc. The moisture content of the water-adjusting material is 30% or less, preferably 15% or less.

[0050] The raw material is put into the treatment container of the hydrolysis treatment device.

[0051] If the raw material is put into the processing container, the raw material can also be stirred by rotating the stirring unit in the processing container. The operation of the stirring unit can be either continuous or intermittent, but it is preferred to control the rotation direction by a timer in a manner that repeats forward and reverse rotation every predetermined time.

[0052] After the raw material and the water content adjusting material are introduced from the raw material introduction port 21 of the processing container 23, the pressure-resistant valve 27 on the raw material introduction port 21 side is closed, and the processing container 23 is brought into a sealed state (S300).

[0053] (Pressure and Temperature Rising Step S400)

[0054] When the processing container 23 is in a sealed state, steam is supplied from the boiler 4 through the steam supply pipe 24 and the control valve 29 into the processing container 23 to increase the pressure and temperature of the processing container 23 to predetermined pressure and temperature.

[0055] At this time, the internal pressure of the processing container is 1.2MPa~3.0MPa, preferably 1.5MPa~2.5MPa, the internal temperature is 189℃~234℃, preferably 200℃~224℃, and the temperature holding time for hydrolysis is 10 minutes to 2 hours from the time the internal temperature reaches the target temperature range, preferably 30 minutes to 1.5 hours. The target temperature range varies depending on the type of raw material. Because it is saturated water vapor, if one of the pressure and temperature is known, the other is determined. The temperature is set relatively low and the holding time is set relatively long, so the solid component of the product is not carbonized, and in the biomass gasification recovery process described later, biomass gasification can be carried out smoothly during biomass gasification. Due to production capacity, an upper limit is set for the holding time. Biomass gas contains methane in many cases.

[0056] (Hydrolysis Process S500)

[0057] If the inside of the treatment container 23 is maintained at a predetermined pressure and temperature, the hydrolysis treatment starts because the raw material is organic waste. If the predetermined time has passed within the above-mentioned holding time since the start of the supply of steam, the hydrolysis treatment of the raw material is almost completed, so the supply of steam from the boiler 4 to the inside of the treatment container 23 is stopped to end the hydrolysis treatment. Through this hydrolysis treatment step, the raw material is hydrolyzed, and in the case where the water content adjustment material is organic, the water content adjustment material is also hydrolyzed, and harmful heavy metal ions and the like are dissolved into the liquid component, but are adsorbed on the unhydrolyzed adsorption material and move to the solid component side.

[0058] In the hydrolysis treatment step, the motor 28 may be driven in the same manner as in the raw material feeding step to rotate the stirring unit to stir the raw material. The stirring operation may be continuous or intermittent, but it is preferred that the rotation direction be controlled by a timer in such a manner that forward and reverse rotation are repeated every predetermined time.

[0059] The time for the hydrolysis treatment is appropriately changed depending on the treatment amount and the like, but about 10 minutes to 2 hours is sufficient.

[0060] The raw materials are hydrolyzed, and high molecular weight materials such as cellulose are reduced to low molecular weight materials. That is, plant fibers (cell walls and cell membranes of plants) become brittle or damaged. In addition, elements such as potassium, chlorine, and chlorine in plant cells are dissolved into the liquid component or become easily dissolved into the liquid component.

[0061] (Steam exhaust process S600)

[0062] After the hydrolysis treatment step is completed, steam is exhausted through the steam exhaust pipe 26 connected to the steam exhaust port 26a over 5 to 60 minutes to release the pressure inside the treatment container 23 to about normal pressure (0.1 MPa). The exhausted steam also contains dust of the raw material along with the droplets.

[0063] After the hydrolysis treatment step is completed, the pressure inside the treatment container 23 is released to the normal pressure of 0.1 MPa to 0.3 MPa using the condenser 5 over 30 to 60 minutes.

[0064] (Product Discharging Step S700)

[0065] The product (in a sludge state) that has been hydrolyzed in the waste biomass gasification treatment device 1 is discharged from the product discharge port 22 at the lower portion of the treatment container 23 .

[0066] If necessary, a washing step and / or a solid-liquid separation step may be performed before the sludge which is a hydrolysis product is subjected to the biomass gasification treatment.

[0067] In the cleaning process, the discharged product is put into a cleaning device equipped with a stirrer, immersed in a cleaning liquid, stirred and cleaned. The cleaning liquid can be water such as factory water or tap water, and the volume of the raw material used is 5 times or more, preferably 10 to 20 times. The temperature of the cleaning liquid can be about room temperature to 60°C. The cleaning time is appropriately changed according to the processing volume, but about 15 minutes to 30 minutes is sufficient.

[0068] Depending on the state of the product, there are cases where solid-liquid separation (dehydration) is performed using a solid-liquid separation device before gasification, or cases where it is not performed. The case where solid-liquid separation is not performed is when the raw material contains almost no chlorine components, potassium, or other components that hinder methane fermentation in the biomass gasification recovery process described later. The case where solid-liquid separation is performed is when a large amount of hindering components are contained, and in the above-mentioned washing process, the product is washed with water to perform solid-liquid separation. Before solid-liquid separation, a washing liquid such as water is added to the hydrolyzed product, stirred, and solid-liquid separation is performed, so that the hindering components can be further transferred to the liquid side and removed. The water content is reduced to 70% to 90% by the solid-liquid separation process.

[0069] In the case of solid-liquid separation, solid-liquid separation means such as suspension sedimentation separation, filter pressing, centrifugal separation, etc. can also be used to separate the solid and liquid and reduce the water content. Depending on the raw material to be hydrolyzed, the solid component of the separated product can be used as fertilizer or compost, and the liquid component of the product can be used as a raw material for liquid fertilizer. The water content is reduced to 70% to 90% by the washing process.

[0070] When performing solid-liquid separation, sometimes a simple filter such as a metal mesh is used to simply remove the liquid component, and then the product is sent to a solid-liquid separation device for solid-liquid separation. Thus, the product is separated (dehydrated) into a solid component and a liquid component. A solid-liquid separation device such as a screw conveyor type that squeezes and shrinks (dehydrates) the liquid component from the solid component, that is, the raw material can be used (for example, refer to Japanese Patent Publication No. 2012-153790). If it is a screw conveyor type, solid-liquid separation can be performed continuously, so the productivity is good. In the case where the raw material is EFB, etc., please refer to Patent Document 1 for the specific process.

[0071] The product hydrolyzed in the hydrolysis device 2 is fed into the biomass gasification recovery device 3 .

[0072] (Biomass Gasification Recovery Process S800)

[0073] The product is gasified and the biomass gas is recovered in the biomass gasification recovery device 3. The product is pre-hydrolyzed and once decomposed, so a large amount of biomass gas can be generated in a short time. The generated biomass gas is mainly methane, which can be used for power generation and as a gas fuel. It is preferred that the biomass gasification recovery device uses a commercially available methane fermentation biomass gas generation device.

[0074] Depending on the waste, there is a case where a treatment is performed to reduce the content of chlorine, potassium, etc. in the solid component. After the solid-liquid separation process, the process returns to the cleaning process, and the separation process and the cleaning process are repeated multiple times. In this way, the product can be reliably cleaned. Through multiple cleanings, chlorine, potassium, etc. in the solid matter are dissolved into the cleaning liquid, so the content of chlorine and potassium in the solid component can be reduced. Depending on the waste, the treatment to reduce the content of potassium in the solid component is sometimes performed before the raw material input process.

[0075] In this embodiment, the cleaning liquid in the cleaning step is water. Therefore, no special chemical liquid is used as the cleaning liquid for the product, so cheap factory water or tap water can be used.

[0076] As mentioned above, although the preferred embodiment of the present invention has been described in detail, the present invention is not limited to the above-mentioned embodiment, and various deformation|transformation and changes can be made within the scope of the summary of the present invention described in the claims.

[0077] Description of Reference Numerals

[0078] 1…waste biomass gasification treatment device; 2…hydrolysis device; 2a…pressure gauge; 2b…thermometer; 2c…safety valve; 3…biomass gasification recovery device; 4…boiler; 5…condenser; 6…control device; 14…steam exhaust port; 21…raw material input port; 22…product exhaust port; 23…processing container; 24…steam supply piping; 25…steam supply port; 26…steam exhaust piping; 26a…steam exhaust port; 27…pressure-resistant valve; 28…motor; 29…control valve; 31…product receiving port; 32…biomass gas exhaust port; 41…fuel supply port

Claims

1. A waste biomass gasification treatment device, characterized in that: have: Hydrolysis unit; A solid-liquid separation device performs solid-liquid separation of the hydrolyzed raw material, transfers the components that hinder methane fermentation to the liquid side, removes the components that hinder methane fermentation from the hydrolyzed raw material, and obtains a product with a water content of 70% to 90% as a solid component; as well as A biomass gasification recovery device gasifies the generated biomass and recovers the generated biomass gas. The hydrolysis device comprises: A processing container having a raw material input port and a product discharge port; A stirring unit is disposed inside the processing container to stir the raw materials; a steam supply pipe for supplying steam to the processing container; as well as The steam exhaust pipe exhausts steam from the processing container.

2. A method for gasifying waste biomass, characterized in that: have: A raw material input process, in which raw materials including organic waste are input into a processing container; A hydrolysis treatment step, hydrolyzing the raw material by steam; a solid-liquid separation step of separating the raw material hydrolyzed in the hydrolysis treatment step into solid-liquid form, transferring the components that inhibit methane fermentation to the liquid side, thereby removing the components that inhibit methane fermentation from the hydrolyzed raw material, and obtaining a product having a water content of 70% to 90% as a solid component; as well as The biomass gasification and recovery step gasifies the product biomass and recovers the generated biomass gas. In the hydrolysis treatment step, the internal pressure of the treatment container is set to 1.2 MPa to 3.0 MPa, the treatment temperature is set to 189 to 234° C., and the retention time after the treatment temperature reaches the target temperature range is set to 10 minutes to 2 hours.

3. The method for treating waste biomass by gasification according to claim 2, characterized in that: Before the solid-liquid separation step, a washing step of washing the raw material hydrolyzed in the hydrolysis treatment step with water is included.

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