Piping in gasification system, gasification system and method for producing synthesis gas using the same, and fuel production system and method for producing liquid fuel using the same

Abstract

To provide piping in a gasification system, the gasification system and a method for producing synthesis gas using the same, and a fuel production system and a method for producing liquid fuel using the same, which are excellent in handleability and safety, improve energy efficiency, and can suppress blockage of the piping at low cost.SOLUTION: A piping communicates a biomass feedstock feeding device for supplying biomass feedstock to a gasifier and a synthesis gas production apparatus including a gasification furnace for gasifying the biomass feedstock to produce synthesis gas, wherein the synthesis gas production apparatus comprises gasification furnace temperature measurement means for measuring a temperature of an upper end part of the gasification furnace, and the piping comprises piping temperature measurement means for measuring a temperature inside the piping, and piping cooling means for cooling at least a part of the piping.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to piping in a gasification system, a gasification system and a method for producing synthesis gas using the same, and a fuel production system and a method for producing liquid fuel using the same. [Background technology]

[0002] Efforts aimed at mitigating or reducing the impact of climate change have been ongoing for some time, and research and development into reducing carbon dioxide emissions is being carried out to achieve this. In recent years, synthetic fuels made from hydrogen generated from electricity generated by renewable energy sources and carbon sources such as biomass and carbon dioxide emitted from factories have been attracting attention as an alternative to fossil fuels.

[0003] The general procedure for producing liquid fuels such as methanol and gasoline using biomass as a feedstock is as follows: A liquid fuel is produced from biomass feedstock through the following steps: a gasification process in which biomass feedstock that has undergone a specified pretreatment is gasified together with water and oxygen in a gasifier to produce a synthesis gas containing hydrogen and carbon monoxide; a cleaning process in which the synthesis gas produced is cleaned and tar is removed; an H2 / CO ratio adjustment process in which the H2 / CO ratio of the synthesis gas that has undergone the cleaning process is adjusted to a target ratio appropriate for the liquid fuel to be produced; a desulfurization process in which sulfur components are removed from the synthesis gas that has undergone the H2 / CO ratio adjustment process; and a fuel production process in which liquid fuel is produced from the synthesis gas that has undergone the desulfurization process.

[0004] When solid biomass feedstock is gasified, some of the carbon and hydrogen are burned. However, if the degree of this partial combustion is too low, the amount of non-gaseous combustibles such as tar, soot, and dust produced increases. This increase in production can clog the pipes, making it impossible to supply biomass feedstock. Therefore, a method is needed to reduce the amount of non-gaseous combustibles such as tar, soot, and dust produced.

[0005] Patent Document 1 discloses an invention in which, in a process of gasifying biomass by reacting it with an oxidizing gas, air activated by contact with an alpha-ray product is used as the oxidizing gas, thereby promoting the decomposition of hydrocarbons and suppressing the production of tar. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2017-193676 Summary of the Invention [Problem to be solved by the invention]

[0007] The tar production suppression method disclosed in Patent Document 1 requires alpha-ray irradiation, for example, contact with a molded body containing thorium, which makes handling of radioactive materials difficult and poses safety issues. Furthermore, an apparatus for alpha-ray irradiation is required, which increases energy consumption and poses problems in terms of capital investment costs.

[0008] In order to solve the above problems, the present application provides piping for a gasification system that is easy to handle and safe, improves energy efficiency, and can suppress piping blockage at low cost, a gasification system and a method for producing synthesis gas using the same, and a fuel production system and a method for producing liquid fuel using the same, which will ultimately contribute to mitigating or reducing the impact of climate change. [Means for solving the problem]

[0009] [1] A piping system that connects a biomass feedstock supplying device for supplying biomass feedstock to a gasification device and a synthesis gas production device including a gasification furnace that gasifies the biomass feedstock to produce synthesis gas, the synthesis gas production apparatus is provided with a gasification furnace temperature measuring means for measuring the temperature of an upper end of the gasification furnace, The piping comprises a piping temperature measuring means for measuring a temperature inside the piping, and a piping cooling means for cooling at least a portion of the piping.

[0010] The pipe of the present invention can suppress clogging by using a pipe cooling means that is easy to handle and safe. Furthermore, since no special reagents or equipment are required, energy efficiency can be improved and clogging of piping can be prevented at low cost.

[0011] [2] The piping described in [1], wherein the piping does not have any region where the temperature is above 300°C and below 600°C.

[0012] The piping of the present invention does not have the above temperature range, and therefore can suppress clogging.

[0013] [3] The piping described in [1] or [2], wherein the piping cooling means starts or strengthens cooling of at least a portion of the piping when the temperature inside the piping exceeds a predetermined value.

[0014] The piping of the present invention can prevent the piping from clogging and prevent the piping from being overcooled by starting or strengthening cooling of at least a portion of the piping when a predetermined value is exceeded, thereby improving energy efficiency.

[0015] [4] The piping according to [3], wherein the predetermined value is 300°C.

[0016] The piping of the present invention can prevent the piping from clogging and prevent the piping from being overcooled by initiating or strengthening cooling of at least a portion of the piping when the temperature exceeds 300°C, thereby improving energy efficiency.

[0017] [5] The piping described in any one of [1] to [4], wherein the piping cooling means comprises a cooling gas supply means for cooling the inside of the piping by spraying a cooling gas onto at least a portion of the inside and outside of the piping to cool the outside of the piping, and a cooling gas control means for controlling the cooling gas so that the temperature inside the piping is 300°C or less and the temperature at the upper end of the gasification furnace is 600°C or more.

[0018] The piping of the present invention can prevent clogging of the piping and improve energy efficiency by keeping the temperature inside the piping at 300°C or less, and by preventing the piping from being overcooled. Furthermore, by keeping the temperature of the upper end of the gasification furnace at 600°C or higher, the gasification reaction of the biomass feedstock can be facilitated. In particular, when the above configuration is used in a small-scale gasification system in which the diameter of the gasification furnace is 50 mm or less, energy efficiency can be further improved and clogging of the piping can be more easily prevented at low cost.

[0019] [6] The piping described in any one of [1] to [4], wherein the piping cooling means is a jacket surrounding at least a portion of the outside of the piping, and the jacket is configured to cool the inside of the piping by flowing a cooling liquid into the jacket to cool the outside of the piping, and the piping described in any one of [1] to [4] is configured to control the cooling liquid in the jacket so that the temperature inside the piping is 300°C or less and the temperature of the upper end of the gasification furnace is 600°C or more.

[0020] The piping of the present invention can prevent clogging of the piping and improve energy efficiency by keeping the temperature inside the piping at 300°C or less, and by preventing the piping from being overcooled. Furthermore, by keeping the temperature at the upper end of the gasification furnace at 600°C or higher, the gasification reaction of the biomass feedstock can be facilitated. In particular, when the gasification furnace is used in a medium-scale gasification system with a diameter of more than 50 mm, the above configuration can further improve energy efficiency and more easily prevent clogging of the piping at low cost.

[0021] [7] In a gasification system for producing synthesis gas from biomass feedstock, The gasification system includes a biomass feedstock supply device for supplying biomass feedstock to a gasification device; a synthesis gas production apparatus including a gasification furnace that gasifies the biomass feedstock to produce synthesis gas; a piping that connects the biomass feedstock supply device and a synthesis gas production device, the synthesis gas production apparatus is provided with a gasification furnace temperature measuring means for measuring the temperature of an upper end of the gasification furnace, A gasification system comprising: the piping including a piping temperature measuring means for measuring a temperature inside the piping; and a piping cooling means for cooling at least a portion of the piping.

[0022] The gasification system of the present invention can prevent clogging by using a pipe cooling means that is easy to handle and safe. Furthermore, since no special reagents or equipment are required, energy efficiency can be improved and clogging of piping can be prevented at low cost.

[0023] [8] The gasification system according to [7], wherein the piping does not have any region where the temperature is above 300°C and below 600°C.

[0024] In the gasification system of the present invention, the piping does not have the above-mentioned temperature range, so that clogging can be suppressed.

[0025] [9] The gasification system according to [7], wherein the pipe cooling means starts or strengthens cooling of at least a portion of the pipe when the temperature inside the pipe exceeds a predetermined value.

[0026] The gasification system of the present invention can prevent the pipes from becoming clogged and prevent the pipes from being overcooled by starting or strengthening cooling of at least a portion of the pipes when a predetermined value is exceeded, thereby improving energy efficiency.

[0027]

[10] The gasification system according to [9], wherein the predetermined value is 300°C.

[0028] The gasification system of the present invention can improve energy efficiency by initiating or strengthening cooling of at least a portion of the piping when the temperature exceeds 300°C, thereby preventing blockage of the piping and preventing the piping from being overcooled.

[0029]

[11] The pipe cooling means comprises: a cooling gas supply means for blowing a cooling gas onto at least a part of the inside and outside of the pipe to cool the outside of the pipe, thereby cooling the inside of the pipe; and a cooling gas control means for controlling the cooling gas so that the temperature inside the pipe is 300°C or less and the temperature of the upper end of the gasification furnace is 600°C or more; The gasification system according to any one of [7] to

[10] , wherein the inner diameter of the pipe is approximately the same as the inner diameter of the gasification furnace.

[0030] In the gasification system of the present invention, by setting the temperature inside the piping to 300°C or less, clogging of the piping can be suppressed and the piping can be prevented from being overcooled, thereby improving energy efficiency. Furthermore, by setting the temperature at the upper end of the gasification furnace to 600°C or higher, the gasification reaction of the biomass feedstock can be facilitated. In particular, when the gasification system is used in a small-scale gasification apparatus in which the diameter of the gasification furnace is 50 mm or less, the above configuration can further improve energy efficiency and more easily suppress clogging of the piping at low cost.

[0031]

[12] The piping cooling means comprises a jacket surrounding at least a part of the outside of the piping, for cooling the inside of the piping by flowing a cooling liquid into the jacket to cool the outside of the piping, and a refrigerant control means for controlling the cooling liquid in the jacket so that the temperature inside the piping is 300°C or less and the temperature of the upper end of the gasification furnace is 600°C or more, The outer diameter of the pipe is smaller than the inner diameter of the gasification furnace, The outer diameter of the jacket is smaller than the inner diameter of the gasification furnace, The gasification system according to any one of [7] to

[10] , wherein a lower end of the pipe and a lower end of the jacket are inserted into the gasification furnace.

[0032] In the gasification system of the present invention, by setting the temperature inside the piping to 300°C or less, clogging of the piping can be suppressed and the piping can be prevented from being overcooled, thereby improving energy efficiency. Furthermore, by setting the temperature at the upper end of the gasification furnace to 600°C or higher, the gasification reaction of the biomass feedstock can be facilitated. In particular, when the gasification system is used in a medium-scale gasification apparatus with a diameter of the gasification furnace exceeding 50 mm, the above configuration can further improve energy efficiency and more easily suppress clogging of the piping at low cost.

[0033]

[13] A method for producing synthesis gas using the gasification system according to any one of [7] to

[11] , A method for producing synthesis gas, comprising a cooling step of cooling the piping.

[0034] The synthesis gas production method of the present invention can prevent clogging by using a pipe cooling means that is easy to handle and safe. Furthermore, since no special reagents or equipment are required, energy efficiency can be improved and clogging of piping can be prevented at low cost. This will improve energy efficiency and enable synthesis gas to be produced at lower cost.

[0035]

[14] The method for producing synthesis gas according to

[13] , wherein the cooling step includes cooling the gasification furnace so that the temperature inside the pipe is 300°C or lower and the temperature at the upper end of the gasification furnace is 600°C or higher.

[0036] In the synthesis gas production method of the present invention, by setting the temperature inside the pipe to 300°C or less, clogging of the pipe can be suppressed and the pipe can be prevented from being overcooled, thereby improving energy efficiency. Furthermore, by setting the temperature at the upper end of the gasification furnace to 600°C or more, the gasification reaction of the biomass feedstock can be facilitated.

[0037]

[15] A fuel production system for producing liquid fuel from biomass feedstock, comprising: A fuel production system comprising the gasification system according to any one of [7] to

[11] .

[0038] The fuel production system of the present invention can prevent clogging by using a pipe cooling means that is easy to handle and safe. Furthermore, since no special reagents or equipment are required, energy efficiency can be improved and clogging of piping can be prevented at low cost. This will improve energy efficiency and allow liquid fuel to be produced at lower cost.

[0039]

[16] A method for producing liquid fuel using the fuel production system according to

[15] , A method for producing a liquid fuel, comprising: a cooling step of cooling the piping.

[0040] The liquid fuel production method of the present invention can prevent clogging by using a pipe cooling means that is easy to handle and safe. Furthermore, since no special reagents or equipment are required, energy efficiency can be improved and clogging of piping can be prevented at low cost. This will improve energy efficiency and allow liquid fuel to be produced at lower cost.

[0041]

[17] The method for producing liquid fuel according to

[16] , wherein the cooling step includes cooling so that the temperature inside the pipe is 300°C or less and the temperature at the upper end of the gasification furnace is 600°C or more.

[0042] In the liquid fuel production method of the present invention, by setting the temperature inside the pipe to 300°C or less, clogging of the pipe can be suppressed and the pipe can be prevented from being overcooled, thereby improving energy efficiency. Furthermore, by setting the temperature at the upper end of the gasification furnace to 600°C or more, the gasification reaction of the biomass feedstock can be facilitated. [Effects of the Invention]

[0043] According to the present invention, it is possible to provide piping in a gasification system that is easy to handle and safe, improves energy efficiency, and can suppress piping blockage at low cost, a gasification system and a method for producing synthetic gas using the same, and a fuel production system and a method for producing liquid fuel using the same. [Brief explanation of the drawings]

[0044] [Figure 1] 1 is a schematic diagram illustrating a gasification system according to an embodiment of the invention. [Figure 2] 1 is a schematic diagram showing a portion of a gasification system according to an embodiment of the invention. [Figure 3] FIG. 2 is a schematic diagram showing a portion of a gasification system according to another embodiment of the invention. [Figure 4] 1 is a flowchart showing an overview of a method for suppressing blockage of a pipe according to an embodiment of the present invention. [Figure 5] 1 is a flowchart showing an outline of a liquid fuel production method according to an embodiment of the present invention. [Figure 6] 1 is a schematic diagram illustrating a fuel production system according to an embodiment of the invention. [Figure 7] FIG. 1 is a schematic diagram illustrating a fuel production system according to another embodiment of the present invention. [Figure 8] 1 is a diagram showing the relationship between the presence or absence of clogging (raw material supply amount) and the temperature inside the pipe in Example 1, Example 2, and Comparative Example 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0045] The following describes in detail the embodiments of the present invention, but the present invention is not limited to the following embodiments.

[0046] <<Gasification System>> 1 is a schematic diagram showing a gasification system including piping according to this embodiment. The gasification system 30 includes a biomass material supplying device 2 that supplies biomass material, a gasification device 3 that gasifies the biomass material supplied from the biomass material supplying device 2 to produce synthesis gas containing hydrogen and carbon monoxide, piping 23 that connects the biomass material supplying device 2 and the gasification device 3, a hydrogen production device 10 that produces hydrogen to be supplied to the gasification device 3, and a steam supplying device 9 that supplies steam to the gasification device 3. These components produce synthesis gas from the biomass material. The produced synthesis gas is supplied to an FT device 6 that produces liquid fuel.

[0047] The inner diameter of the pipe 23 is preferably 20 to 30 mm, more preferably 23 to 28 mm, and even more preferably 25 to 26 mm. The length of the pipe is preferably 10 to 30 cm, more preferably 15 to 25 cm, and even more preferably 20 to 20 cm. The piping is not particularly limited as long as it is heat resistant, but may be made of metal, and is particularly preferably made of stainless steel.

[0048] 2 is a schematic diagram showing a portion of a gasification system according to this embodiment. The gasification system 31 includes a biomass material supplying device 2 (not shown), a gasification device 3, a pipe 23 connecting the biomass material supplying device 2 and the gasification device 3, a cooling gas inlet C for cooling the inside of the pipe, a temperature measuring means T1 for measuring the temperature of an area inside the pipe opposite the area onto which the cooling gas is blown, a heating device H for heating the gasification furnace of the gasification device 3, and a temperature measuring means T2 for measuring the temperature of the upper end of the gasification furnace. The gasification system 31 produces a synthesis gas SG from biomass material B. 2, the inner diameter of the pipe 23 and the inner diameter of the gasification furnace are approximately the same. For example, the inner diameter of the pipe 23 and the inner diameter of the gasification furnace may be 20 to 30 mm. The position and size of the cooling gas inlet C are not particularly limited as long as it can cool the piping to 300°C or less, but it may be provided, for example, in a region 10 to 20 mm from the upper end of the gasification furnace. The cooling gas inlet C may be formed by a cylindrical pipe with an inner diameter of 5 to 10 mm, which is positioned so as not to communicate with the inside of the piping and is spaced apart from the side of the piping. The type and temperature of the cooling gas are not particularly limited as long as they can cool the piping to 300°C or less, but may be, for example, air or an inert gas such as nitrogen. The temperature of the cooling gas is not particularly limited as long as they can cool the piping to 300°C or less, but may be, for example, 40°C or less, 30°C or less, or room temperature. As shown in FIG. 2, it is preferable from the perspective of cooling efficiency that the heating device H heats up to the upper end of the gasification furnace but does not heat the piping 23. In this specification, the upper end of the gasification furnace means the region within 5 mm below the upper end surface of the gasification furnace. As shown in FIG. 2, a metal mesh M and silica wool W may be provided inside the gasification furnace to fix the supplied biomass material B inside the gasification furnace.

[0049] 3 is a schematic diagram showing part of a gasification system according to another embodiment. The gasification system 32 includes a biomass material supplying device 2 (not shown), a gasification device 3, piping 23 connecting the biomass material supplying device 2 and the gasification device 3, a jacket J attached to the outside of the piping for cooling the piping from the outside, a temperature measuring means T1 for measuring the temperature inside the piping, a heating device H for heating the gasification furnace of the gasification device 3, and a temperature measuring means T2 for measuring the temperature at the upper end of the gasification furnace, and produces a synthesis gas SG from a biomass material B using these components. 3, the outer diameter of the pipe 23 is smaller than the inner diameter of the gasification furnace, the outer diameter of the jacket J is smaller than the inner diameter of the gasification furnace, and the lower end of the pipe 23 and the lower end of the jacket J are inserted inside the gasification furnace. For example, the inner diameter of the pipe 23 and the inner diameter of the gasification furnace may be 20 to 30 mm. The inner diameter of the gasification furnace may be 70 to 110 mm, or 80 to 100 mm. The inner diameter of the jacket is not particularly limited as long as it can be attached to the pipe 23, but may be, for example, 22 to 32 mm. The position and size of the jacket J are not particularly limited as long as they can cool the piping to 300°C or less, but may be, for example, 3 mm or less in thickness and 10 to 20 cm in length. The temperature of the coolant flowing inside the jacket J is not particularly limited as long as they can cool the piping to 300°C or less, but may be, for example, -20 to 0°C or -15 to -5°C. Examples of the coolant include ethylene glycol and a mixed solvent of ethylene glycol and water. As shown in FIG. 3, the temperature measuring means T1 may be a means for measuring the temperature of the coolant flowing inside the jacket and determining the temperature inside the pipe from the measured temperature. As shown in FIG. 3, a heating device H heats the lower end of the pipe 23 inserted inside the gasification furnace and the lower end of the jacket J. As shown in FIG. 3, a metal mesh M and silica wool W may be provided inside the gasification furnace to fix the supplied biomass material B inside the gasification furnace. 3, a heat insulating material I for maintaining the temperature of the jacket J may be provided upstream of the gasification furnace and the heating device H. By providing the heat insulating material I, the temperature at the position where the heat insulating material I is provided can be maintained at the same temperature as the temperature at the position heated by the heating device H. As shown in FIG. 3, the temperature measuring means T2 may measure the temperature of the upper end of the insulating material I.

[0050] <<Method for preventing pipe blockage>> FIG. 4 is a flowchart showing an outline of the method for suppressing clogging of a pipe according to this embodiment. First, the control device cools the inside of the pipe so that the temperature inside the pipe is normal, that is, 300° C. or less, based on the detection signal of the temperature sensor that measures the temperature inside the pipe. Next, based on a detection signal from a temperature sensor that measures the temperature at the upper end of the gasification furnace, the control device raises the temperature of the gasification furnace so that the temperature at the upper end of the gasification furnace reaches a normal state, that is, 600°C or higher. Next, the control device measures the temperature inside the pipe and determines whether the temperature inside the pipe is in the normal state, i.e., below 300°C. If the determination result is YES, the control device controls the cooling means to maintain the temperature inside the pipe in the normal state, i.e., below 300°C. If the determination result is NO, the control device controls the cooling means by lowering the temperature of the cooling means or by increasing the flow rate of the cooling gas or cooling medium in the cooling means so that the temperature inside the pipe is in the normal state, i.e., below 300°C.

[0051] As described above, in the method for suppressing pipe clogging shown in Fig. 4, when the temperature inside the pipe is 300°C or higher, the cooling means is controlled to lower the temperature inside the pipe, and when the temperature inside the pipe is 300°C or lower, the cooling means is controlled to maintain the temperature inside the pipe. This suppresses pipe clogging and prevents the pipe from being overcooled, thereby improving energy efficiency.

[0052] <<Fuel production method>> FIG. 5 is a flowchart showing the configuration of the fuel production method according to this embodiment. As shown in FIG. 5 , the fuel production method according to the embodiment includes a biomass feedstock supply step S2 of supplying a biomass feedstock to a gasification furnace for producing a synthesis gas, a hydrogen supply step S12 of supplying hydrogen to the gasification furnace, a steam supply step S9 of supplying steam to the gasification furnace, a synthesis gas production step S3 of reacting the biomass feedstock, hydrogen, steam, etc. to produce a synthesis gas containing hydrogen and carbon monoxide, a Fischer-Tropsch synthesis step S6 of producing a Fischer-Tropsch oil by subjecting the produced synthesis gas to a Fischer-Tropsch synthesis reaction, and a heavy fraction (approximately C ) contained in the Fischer-Tropsch oil. 21or more) is hydrocracking using hydrogen to change the carbon number to C 20 and a fractionation step S8 in which the Fischer-Tropsch oil is hydrocracking and then fractionated to obtain a liquid fuel and the FT off-gas.

[0053] In the biomass raw material supply step S2, biomass raw materials such as rice husks, bagasse, and wood are subjected to a predetermined pretreatment, and the pretreated biomass raw materials are supplied via a raw material supply line to a gasification furnace of a gasification apparatus that performs the synthesis gas production step S3. Here, the pretreatment of the biomass raw materials includes, for example, a drying step for drying the raw materials and a crushing step for crushing the raw materials.

[0054] In the hydrogen supply step S12, hydrogen is supplied to the gasification furnace of the gasification apparatus. The hydrogen may be generated by, for example, electrolysis of water.

[0055] In the steam supply step S9, steam is supplied to the gasification furnace of the gasification apparatus. The temperature of the steam is preferably 500°C or higher.

[0056] In the synthesis gas production step S3, the biomass raw material, hydrogen, carbon monoxide, and carbon dioxide are reacted to produce synthesis gas containing hydrogen and carbon monoxide. When hydrogen, carbon monoxide, and carbon dioxide are fed into a gasification furnace that has already been charged with biomass raw materials, a total of eight types of gasification reactions and their reverse reactions, such as those shown in the following formulas (1-1) to (1-8), occur in the gasification furnace, producing synthesis gas containing hydrogen, carbon monoxide, carbon dioxide, and hydrocarbons.

[0057] [ka]

[0058] [ka]

[0059] The gasification of the biomass raw material is preferably carried out at a temperature of 850° C. or higher, more preferably 900° C. or higher. When the gasification temperature is equal to or higher than the lower limit, the biomass raw material is easily gasified.

[0060] A fuel production system according to an embodiment of the present invention will be described below with reference to the drawings. do.

[0061] 6 is a diagram showing the configuration of a fuel production system 1 according to this embodiment. The fuel production system 1 includes a biomass material supplying device 2 that supplies biomass material, a gasification device 3 that gasifies the biomass material supplied from the biomass material supplying device 2 and produces a synthesis gas containing hydrogen and carbon monoxide, an FT device 6 that produces liquid fuel from the synthesis gas supplied from the gasification device 3, a hydrogen production device 10 that produces hydrogen, a steam supplying device 9 that supplies steam, a hydrogen tank 12 that stores the hydrogen produced by the hydrogen production device 10, and a control device 13 that controls these devices, and produces liquid fuel from the biomass material.

[0062] The biomass raw material supply device 2 performs predetermined pretreatment on biomass raw materials such as rice husks, bagasse, and wood, and supplies the pretreated biomass raw materials to the gasification furnace of the gasification device 3 via a raw material supply path. Here, the pretreatment of the biomass raw materials includes, for example, a drying process for drying the raw materials and a crushing process for crushing the raw materials. The method for supplying the biomass raw material to the gasification furnace is not particularly limited, and any known supply method can be used.

[0063] The gasification device 3 may include a gasification furnace that gasifies the biomass raw material supplied through the raw material supply path, a gasification furnace sensor group consisting of multiple sensors that detect the internal condition of the gasification furnace, a steam supply device that supplies steam into the gasification furnace, an oxygen supply device that supplies oxygen into the gasification furnace, a heating device that heats the gasification furnace, a scrubber that cleans the synthesis gas discharged from the gasification furnace, and a desulfurization device that removes sulfur components from the synthesis gas cleaned by the scrubber and supplies the cleaned synthesis gas to the FT device 4. The reaction conditions for producing the synthesis gas are not particularly limited, and known reaction conditions can be used.

[0064] The steam supply device 9 vaporizes water stored in a water tank (not shown) and supplies the vapor to the gasification furnace. The heating device heats the gasification furnace by consuming fuel supplied from a fuel tank (not shown) and electricity supplied from a power source (not shown). The amount of steam supplied from the steam supply device to the gasification furnace and the amount of heat input from the heating device to the gasification furnace are controlled by the control device 13. Note that in the fuel production system 1 according to this embodiment, by supplying hydrogen from the hydrogen production device 10 (described below) to the gasification furnace or the raw material supply path, it may become unnecessary to actively supply steam from the steam supply device to the gasification furnace. In this case, the steam supply device can be omitted from the fuel production system 1. The method for producing and supplying steam is not particularly limited, and any known production and supply method can be used.The method for heating the gasification furnace is not particularly limited, and any known heating method can be used.

[0065] When water, hydrogen, heat, etc. are fed into a gasification furnace containing biomass raw materials using a steam supply device, a hydrogen production device, and a heating device, a total of eight types of gasification reactions and their reverse reactions, such as those shown in the above formulas (1-1) to (1-8), proceed within the gasification furnace, and synthesis gas containing hydrogen, carbon monoxide, carbon dioxide, and hydrocarbons is produced.

[0066] The gasification furnace sensor group is composed of, for example, a pressure sensor that detects the pressure inside the gasification furnace, a temperature sensor that detects the temperature inside the gasification furnace, an H2 / CO sensor that detects the H2 / CO ratio corresponding to the ratio of hydrogen to carbon monoxide in the synthesis gas inside the gasification furnace, and a CO2 sensor that detects carbon dioxide inside the gasification furnace, etc. Detection signals of these sensors that make up the gasification furnace sensor group are sent to the control device 13.

[0067] The hydrogen production device 10 includes an electrolysis device (not shown) and generates hydrogen using electric power. The device for generating hydrogen using electricity is not particularly limited, and any known device can be used, such as a device that generates hydrogen by electrolysis of water. The hydrogen tank 12 stores the hydrogen produced by the hydrogen production device 10. The hydrogen is supplied from the hydrogen tank 12 to the gasification device 3. There are no particular limitations on the hydrogen tank, and any known tank can be used. For example, a pressure-resistant tank can be used. The hydrogen tank may be made of metal or resin.

[0068] The system may have a hydrogen supply pump (not shown) as hydrogen supply means for supplying hydrogen from the hydrogen tank 12 to the gasification apparatus 3. The hydrogen supply pump supplies hydrogen stored in the hydrogen tank 12 into the gasification furnace of the gasification apparatus 3. The amount of hydrogen supplied from the hydrogen supply pump into the gasification furnace is controlled by the control device 13. Note that, in the fuel production system 1 according to this embodiment, a case is described in which hydrogen stored in the hydrogen tank 12 is supplied into the gasification furnace by the hydrogen supply pump, but the present invention is not limited to this. The hydrogen stored in the hydrogen tank 12 may be supplied upstream of the gasification furnace, more specifically, into the raw material supply path for the biomass raw material.

[0069] The control device 13 is a computer that controls the amount of steam supplied by the steam supply device, the amount of heat input by the heating device, the amount of hydrogen produced by the electrolysis device, the amount of hydrogen filled by the hydrogen filling pump, and the amount of hydrogen supplied by the hydrogen supply pump, based on detection signals from the gasification furnace sensors and detection signals from the pressure sensor of the hydrogen tank 12, etc.

[0070] 7 is a diagram showing the configuration of a fuel production system 11 according to another embodiment. The configuration is the same as that shown in FIG. 6 except that the order of the fractionator (L) 8 and the hydrocracker 7 is reversed and a hydrorefining unit 17 is provided downstream of the fractionator (L) 8.

[0071] Although one embodiment of the present invention has been described above, the present invention is not limited to this, and the detailed configuration may be modified as appropriate within the scope of the spirit of the present invention. [Example]

[0072] The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to the following examples.

[0073] Example 1 Using the gasification system shown in Figure 2, the biomass feedstock was supplied to the gasification furnace while cooling it by blowing cooling gas onto the outside of the pipes so that the temperature inside the pipes reached 170°C, and the gasification furnace was heated so that the temperature at the top of the gasification furnace reached 600°C or higher, and the presence or absence of blockages in the pipes was confirmed. The results are shown in Table 1. Figure 8 shows the amount of biomass material that could be supplied to the gasifier.

[0074] <Example 2, Comparative Example 1> Using the gasification system shown in Figure 2, biomass feedstock was supplied to the gasification furnace in the same manner as in Example 1, except that cooling gas was sprayed onto the outside of the pipes to cool them so that the temperatures inside the pipes reached the temperatures listed in Table 1. The results are shown in Table 1. Figure 8 shows the amount of biomass material that could be supplied to the gasifier.

[0075] [Table 1]

[0076] As shown in Table 1, in both Examples 1 and 2 where the temperatures inside the pipe were 300° C. and 309° C., respectively, pipe clogging was suppressed. In addition, as shown in Figure 8, no decrease in the amount of biomass supplied due to pipe clogging was observed. On the other hand, in Comparative Example 1, where the temperature inside the pipe was 330° C., clogging of the pipe could not be prevented. Furthermore, as shown in Fig. 8, clogging of the pipe resulted in an inability to supply biomass. [Explanation of symbols]

[0077] 1, 11 Fuel production system 2. Biomass raw material supply device 3 Gasifier 4 Gas purification equipment 5. Gas pressure generator 6. Fischer-Tropsch Unit (FT Unit) 7 Hydrocracker 8 Fractionation equipment 9. Steam supply device 10 Hydrogen production equipment 12 Hydrogen Tank 13 Control device 17 Hydrotreating Unit 30 Gasification System 23 Piping

Claims

1. A piping system that connects a biomass feedstock supplying device for supplying a biomass feedstock to a gasification device and a synthesis gas production device including a gasification furnace that gasifies the biomass feedstock to produce synthesis gas, the synthesis gas production apparatus is provided with a gasification furnace temperature measuring means for measuring the temperature of an upper end of the gasification furnace, The piping comprises a piping temperature measuring means for measuring a temperature inside the piping, and a piping cooling means for cooling at least a portion of the piping.

2. The piping of claim 1 , wherein the piping has no regions above 300°C and below 600°C.

3. The piping according to claim 1 , wherein the piping cooling means initiates or strengthens cooling of at least a portion of the piping when the temperature inside the piping exceeds a predetermined value.

4. The piping according to claim 3 , wherein the predetermined value is 300° C.

5. 2. The piping according to claim 1, wherein the piping cooling means comprises: a cooling gas supply means for cooling the inside of the piping by spraying a cooling gas onto at least a portion of the outside of the piping to cool the outside of the piping; and a cooling gas control means for controlling the cooling gas so that the temperature inside the piping is 300°C or less and the temperature of the upper end of the gasification furnace is 600°C or more.

6. The piping described in claim 1, wherein the piping cooling means is a jacket surrounding at least a portion of the outside of the piping, and comprises a jacket for cooling the inside of the piping by flowing a cooling liquid into the jacket to cool the outside of the piping, and a refrigerant control means for controlling the cooling liquid in the jacket so that the temperature inside the piping is 300°C or less and the temperature of the upper end of the gasification furnace is 600°C or more.

7. 1. A gasification system for producing synthesis gas from biomass feedstock, comprising: The gasification system includes a biomass feedstock supply device for supplying biomass feedstock to a gasification device; a synthesis gas production apparatus including a gasification furnace that gasifies the biomass feedstock to produce synthesis gas; a piping that connects the biomass feedstock supply device and a synthesis gas production device, the synthesis gas production apparatus is provided with a gasification furnace temperature measuring means for measuring the temperature of an upper end of the gasification furnace, A gasification system comprising: the piping including a piping temperature measuring means for measuring a temperature inside the piping; and a piping cooling means for cooling at least a portion of the piping.

8. The gasification system of claim 7 , wherein the piping has no region that is above 300° C. and below 600° C.

9. The gasification system according to claim 7 , wherein the piping cooling means starts or strengthens cooling of at least a portion of the piping when the temperature inside the piping exceeds a predetermined value.

10. The gasification system of claim 9 , wherein the predetermined value is 300° C.

11. the pipe cooling means comprises: a cooling gas supply means for blowing a cooling gas onto at least a part of the outside of the pipe to cool the outside of the pipe, thereby cooling the inside of the pipe; and a cooling gas control means for controlling the cooling gas so that the temperature inside the pipe is 300°C or less and the temperature of the upper end of the gasification furnace is 600°C or more, The gasification system according to claim 7 , wherein the inner diameter of the pipe is approximately the same as the inner diameter of the gasification furnace.

12. the piping cooling means comprises a jacket surrounding at least a part of the outside of the piping, the jacket for cooling the inside of the piping by causing a cooling liquid to flow into the jacket to cool the outside of the piping, and a refrigerant control means for controlling the cooling liquid in the jacket so that the temperature of the inside of the piping is 300°C or less and the temperature of the upper end of the gasification furnace is 600°C or more, The outer diameter of the pipe is smaller than the inner diameter of the gasification furnace, The outer diameter of the jacket is smaller than the inner diameter of the gasification furnace, The gasification system according to claim 7 , wherein a lower end of the pipe and a lower end of the jacket are inserted into the gasification furnace.

13. A method for producing synthesis gas using the gasification system according to any one of claims 7 to 11, A method for producing synthesis gas, comprising a cooling step of cooling the piping.

14. 14. The method for producing synthesis gas according to claim 13, wherein the cooling step includes cooling the gasification furnace so that the temperature inside the pipe is 300°C or lower and the temperature at an upper end of the gasification furnace is 600°C or higher.

15. A fuel production system for producing liquid fuel from biomass feedstock, A fuel production system comprising the gasification system according to any one of claims 7 to 11.

16. A method for producing liquid fuel using the fuel production system according to claim 15, A method for producing a liquid fuel, comprising: a cooling step of cooling the piping.

17. The method for producing liquid fuel according to claim 16, wherein the cooling step includes cooling the gasification furnace so that the temperature inside the pipe is 300°C or lower and the temperature at the upper end of the gasification furnace is 600°C or higher.

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