WO2016139721A1

WO2016139721A1 - Biomass treatment system

Info

Publication number: WO2016139721A1
Application number: PCT/JP2015/056091
Authority: WO
Inventors: 泰孝和田; 幸彦松村; 良文川井; 琢史野口
Original assignee: 中国電力株式会社; 国立大学法人広島大学; 中電プラント株式会社; 株式会社東洋高圧
Priority date: 2015-03-02
Filing date: 2015-03-02
Publication date: 2016-09-09
Also published as: JP6098912B2; JPWO2016139721A1

Abstract

The purpose of the present invention is to efficiently treat biomass in a biomass treatment system. This biomass treatment system 20, for heat treating a slurry generated from raw material that includes biomass, is provided with a raw material separation unit 31 in which an organic substance that contains proteins, fats and/or dietary fibers is separated as a first separated substance from the raw material, an alkaline treatment unit 32 in which an alkaline solution is added to and reacted with a second separated substance, which is the residual substance left over after the first separated substance has been separated by the raw material separation unit 31, and a sediment separation unit 36 in which the sediment produced by the reaction in the alkaline treatment unit 32 is separated off. A slurry is produced from the solution from which the sediment has been separated.

Description

Biomass processing system

The present invention relates to a biomass processing system for efficiently heat-treating biomass.

A biomass processing system that decomposes biomass in a supercritical state to obtain fuel gas is known. For example, Patent Document 1 discloses that a biomass slurry containing a nonmetallic catalyst is hydrothermally treated under conditions of a temperature of 374 ° C. or higher and a pressure of 22.1 MPa or higher, and the generated gas is used to generate a power generator. A biomass gasification power generation system that generates power and heats a slurry body using exhaust heat from a power generation device is described.

JP 2008-246343 A

One of the typical raw materials for biomass is shochu residue. FIG. 9 is a diagram for explaining a case where the shochu residue is heated and gasified in a general biomass processing system. As shown in the figure, the biomass processing system 1 includes a heating unit 3 and a gas-liquid separation unit 4. Among these, the heating unit 3 includes a heat exchanger 5 that heats a slurry body generated from a mixture of shochu residue, activated carbon, and water, and a heating mechanism 6 that further heats the slurry body. The gas-liquid separation unit 4 performs gas-liquid separation after depressurizing and cooling a supercritical fluid (referred to as a supercritical fluid) after the gasification reaction is completed, thereby obtaining a gas. The gas separated by the gas-liquid separation unit 4 is used as a combustion gas, for example.

Here, as the heat exchanger 5, for example, a double tube heat exchanger may be mentioned. FIG. 10 is a diagram for explaining the configuration of a double pipe in a double pipe heat exchanger. As shown in the figure, the double pipe 7 includes a low temperature side flow path formed by the inner pipe 9 and a high temperature side flow path formed by the outer pipe 12. And the slurry body 8 is introduce | transduced into a low temperature side flow path. A supercritical fluid 11 that exchanges heat with the slurry body 8 is introduced into the high-temperature channel.

Incidentally, tar derived from the components of the shochu residue may adhere to the inner wall surface of the inner pipe 9. FIG. 11 is a cross-sectional photograph of the double tube after heat-exchanging the mixture containing the shochu residue. As shown in the figure, black or brown tar 13 adheres to the inner pipe 9 (low temperature side flow path). In the low temperature side channel, the mixture containing the shochu residue is subjected to heat exchange with a high temperature fluid in a supercritical state or a subcritical state, and the temperature is raised. Here, the shochu residue contains a lot of organic substances such as protein, lipid and dietary fiber. These organic substances are considered to be thermally decomposed when heated, thereby generating tar. The generated tar obstructs the flow of the raw material by blocking the low temperature side flow path. As a result, the amount of exchange heat is reduced and the yield of gas is reduced. Such clogging of piping due to tar may occur not only in the heat exchanger but also in piping in other heating processes in which the raw material is heat-treated.

This invention is made | formed in view of such a situation, The objective is to provide the biomass processing system for heat-processing biomass efficiently.

The present invention for achieving the above-mentioned object is a biomass processing system for heat-treating a slurry produced from a raw material containing biomass, wherein at least one of protein, lipid, and dietary fiber is extracted from the raw material. A raw material separator that separates the organic matter contained therein as a first separated product, and an alkaline processing unit that reacts by adding an alkaline solution to the second separated product that is a residue after the first separated product is separated by the raw material separated unit. And a precipitate separation part for separating the precipitate produced by the reaction in the alkali treatment part, and the slurry body is produced by the solution after separating the precipitate.

Biomass, which is a raw material, contains a large amount of organic substances such as proteins, lipids, and dietary fibers (lignin, etc.), and these organic substances are tars that adhere to various pipes in the process of heat-treating the slurry produced from the raw materials. May be generated. Therefore, as in the present invention, by separating an organic substance containing at least one of protein, lipid, and dietary fiber (such as lignin) from a raw material as a first separated substance (hereinafter also referred to as tar-causing substance), The production | generation of the tar in piping is suppressed and this can block | close the said piping. Thereby, biomass can be heat-processed efficiently.

In addition, by separating the phosphorus compound such as magnesium phosphate as a precipitate from the residue after the separation of the first separated product (second separated product) by the alkali treatment unit, the separated phosphorous compound can be reused as a fertilizer raw material or the like. Can use resources efficiently. Further, as can be seen from the fact that the phosphorus compound is precipitated as described above, the biomass also contains an inorganic substance that generates an inorganic salt. Therefore, the volume of the inorganic material is reduced in the volume of the slurry, and the effect of preventing the blockage of the piping can be expected.

The heat treatment here refers to a heat treatment under a high temperature and high pressure that allows the biomass of the slurry to be heat exchanged with supercritical water, high temperature combustion gas, etc. The temperature that can be used is not only the gasification reaction temperature, but also a heat treatment under supercritical temperature or pressure condition (for example, hydrothermal treatment in a subcritical state or a temperature lower than the gasification reaction temperature). It is a concept including heat treatment in a state.

In the present invention, a drying unit for drying the first separated product may be provided. Alternatively, the drying unit may heat and dry the first separated product.

Since the first isolate separated from biomass (shochu residue) contains a lot of proteins, lipids and dietary fiber, the dried product can be stored for a long time by drying the first isolate as in the present invention. It can be used as a feed that can be transported at low cost. In addition, the moisture can be surely removed by heating and drying.

Moreover, in this invention, the heater which heats the said slurry body is provided, and the said drying part heats and drys the said 1st isolate | separated thing isolate | separated in the said raw material separation part with the waste heat from the said heater. You may do it.

∙ Heat generated in the biomass processing system can be used effectively by heating and drying solids with exhaust heat from the heater.

Note that the alkaline solution is preferably an aqueous solution containing sodium hydroxide or potassium hydroxide.

According to the present invention, biomass can be efficiently heat-treated in the biomass processing system.

It is a figure explaining the composition of the biomass processing system concerning a 1st embodiment. It is a figure explaining the gas-liquid two-phase flow in a double pipe. It is a figure explaining the difference of the gas-liquid two-phase flow in a double pipe in the case where it implements and the case where a separation experiment is not implemented. It is a figure explaining the structure of the biomass processing system which concerns on 2nd Embodiment. It is a figure explaining the procedure of a separation experiment. It is a figure explaining the experimental result of a separation experiment. It is a figure explaining the procedure of an alkali treatment experiment. It is a figure explaining the analysis result (The result of (a) Infrared spectroscopic analysis by a Fourier-transform infrared microspectroscopy apparatus, (b) Elemental analysis by an energy dispersive X-ray microanalyzer) of the deposit 89. It is a figure explaining the case where a shochu residue is gasified by general biomass processing. It is a figure explaining the structure of the double pipe in a double pipe type heat exchanger. It is a cross-sectional photograph of the double tube after heat-exchanging the mixture containing a shochu residue.

<First Embodiment>
FIG. 1 is a diagram illustrating a configuration of a biomass processing system according to the first embodiment. As shown in the figure, the biomass processing system 20 includes a raw material preparation unit 30, a heat treatment unit 40, and a gas-liquid separation unit 50. The biomass processing system 20 is a system (gasification system) that generates combustion gas by heat-treating shochu residue that is a raw material. In addition, the shochu in this case may be any of wheat shochu, shochu shochu, rice shochu, soba shochu, or a combination thereof.

The raw material preparation unit 30 is a part for preparing raw materials. The raw material preparation unit 30 includes a separation device 31, a reaction vessel 32, a preparation tank 33, a pulverizer 34, and a supply pump 35.

The separation device 31 is a device that separates an organic substance (hereinafter referred to as a first separated substance) containing at least one of protein, lipid, and dietary fiber from a shochu residue that is a raw material. The separation device 31 removes proteins, lipids, and dietary fibers contained in the shochu residue.

The first separated product contains more protein, lipid, and dietary fiber than the residue after separating the first separated product by the separation device 31 (hereinafter referred to as the second separated product). In the present embodiment, the first separated product is a solid component, and the second separated product is a liquid component. Details of such a separation device 31 will be described later.

The reaction vessel 32 is a vessel for performing an alkali treatment in which the liquid separated by the separation device 31 is reacted with an alkaline solution such as an aqueous sodium hydroxide solution. The reaction vessel 32 separates inorganic substances such as phosphorus compounds as precipitates. Details of the reaction vessel 32 will be described later.

The preparation tank 33 is a tank that mixes the second separated product separated by the separation device 31, water, and a nonmetallic catalyst (activated carbon in this embodiment), thereby preparing a mixture. For example, porous particles having an average particle diameter of 200 μm or less are used as the activated carbon. The mixing ratio of the liquid, water, and activated carbon is adjusted according to the type, amount, moisture content, etc. of the shochu residue.

The pulverizer 34 pulverizes the mixture obtained in the preparation tank 33 so as to make the shochu residue a uniform size in advance (preferably an average particle size of 500 μm or less, more preferably an average particle size of 300 μm or less). It is a device. Hereinafter, the mixture obtained by the pulverizer 34 is referred to as a slurry body. The supply pump 35 is a device that supplies the slurry discharged from the pulverizer 34 to the heat treatment unit 40.

The heat treatment part 40 is a part that heats and gasifies the slurry body prepared by the raw material preparation part 30. The heat treatment unit 40 includes a high-pressure pump 43, a heat exchanger 44, a heater 45, a gasification reactor 46, and a feed tank 47.

The slurry body sent to the heat treatment unit 40 by the supply pump 35 is sent to the heat exchanger 44 by the high-pressure pump 43.

The heat exchanger 44 is a device that receives the slurry body from the high-pressure pump 43 and further heats the slurry body. The heat exchanger 44 is a double-pipe heat exchanger having a double pipe 48 and is introduced from a gasification reactor 46 and a low-temperature flow path 48a through which the slurry sent from the high-pressure pump 43 flows. A high-temperature flow path 48b through which a fluid in a supercritical state generated in the gasification reactor 46 (a slurry body that has been gasified in the gasification reactor 46; hereinafter referred to as a post-treatment fluid) flows. The slurry body is heated by exchanging heat with the processed fluid in the low temperature channel 48a.

The temperature at the time of introducing the treated fluid into the heat exchanger 44 is, for example, about 600 ° C., and the discharge temperature of the treated fluid from the heat exchanger 44 is, for example, about 120 ° C. On the other hand, the discharge temperature of the slurry body from the heat exchanger 44 is about 450 ° C., for example. That is, in this case, the slurry body is in a supercritical state. The slurry body heated by the heat exchanger 44 is sent to the heater 45.

The heater 45 is a device for heating the slurry body sent from the heat exchanger 44. The heater 45 includes a combustion device 45a, and a product gas (described later) sent from the gas-liquid separator 50 is combusted by the combustion device 45a to heat the slurry body. The slurry body introduced into the heater 45 is heated to about 600 ° C., for example. The heated slurry body is sent to the gasification reactor 46.

The gasification reactor 46 is an apparatus that heats the slurry body sent from the heater 45 and hydrothermally heats organic substances contained in the slurry body. The gasification reactor 46 includes a combustion device 46a, and the product gas sent from the gas-liquid separator 50 is combusted by the combustion device 46a to perform hydrothermal treatment of the slurry body. In this hydrothermal treatment, the slurry body is hydrothermally treated for 1 to 2 minutes under conditions of, for example, 600 ° C. and 25 MPa. The hydrothermally treated slurry body is in a supercritical state and is introduced into the heat exchanger 44 as a post-treatment fluid.

The feed tank 47 is a tank for storing feed that is a by-product in the biomass processing system 20. The feed stored in the feed tank 47 will be described later.

As described above, the post-treatment fluid introduced from the gasification reactor 46 to the heat exchanger 44 is heat-exchanged with the slurry body introduced into the low-temperature flow path 48a, and the temperature decreases while maintaining a high pressure. It becomes a critical state. For example, the temperature of the slurry decreases to about 300 ° C. while maintaining a pressure of 25 MPa.

In the heat exchanger 44, the processed fluid may change from a supercritical state to a subcritical state and be separated into a gas and a liquid and may be in a so-called gas-liquid two-phase flow state.

FIG. 2 is a diagram for explaining this gas-liquid two-phase flow. As shown in the figure, in the high-temperature flow path 48b of the double pipe 48, the processed fluid 61 is separated into an upper portion gas phase portion 61a and a lower portion liquid phase portion 61b. Each of the gas phase portion 61a and the liquid phase portion 61b is heat-exchanged with the slurry body 62 flowing through the low temperature channel 48a.

The post-treatment fluid that has been heat-exchanged with the slurry body in this way is sent to the gas-liquid separator 50.

Next, as shown in FIG. 1, the gas-liquid separator 50 includes a decompression mechanism 51, a gas-liquid separator 52, a gas tank 53, and a drainage treatment device 54.

The decompression mechanism 51 is a part that decompresses the processed fluid sent from the heat treatment unit 40, and is configured by, for example, a capillary tube.

The gas-liquid separator 52 is a part that separates the processed fluid sent from the decompression mechanism 51 into a liquid component (liquid containing activated carbon or ash) and a gas component (gas such as hydrogen or methane). A gas of about 0.3 MPa is discharged from the gas-liquid separator 52 at room temperature.

The gas tank 53 is a container for storing the gas (generated gas) separated by the gas-liquid separator 52. The product gas stored in the gas tank 53 is supplied to the heater 45 and the gasification reactor 46.

The drainage treatment apparatus 54 is an apparatus that separates activated carbon and ash contained in the solution separated by the gas-liquid separator 52 from the solution. The drainage treatment device 54 includes, for example, a separation device that separates a solution containing solids into a liquid component and a solid component. The liquid component separated from the drainage treatment device 54 is discharged as a drainage to a predetermined drainage channel.

By the way, in the double pipe of the heat exchanger 44 (specifically, the low temperature channel 48a), when the slurry body is heated, organic substances (protein, lipid, dietary fiber (lignin, etc.) of the shochu residue are hereinafter referred to as tar causes. The substance is thermally decomposed to generate tar, which may adhere to the inner wall surface of the inner pipe that defines the low-temperature flow path 48a (for example, the temperature of the slurry becomes 150 ° C. to 450 ° C.). Where). The adhering tar eventually closes the low-temperature flow path 48a and hinders the flow of the slurry body. As a result, the gas yield in the gas-liquid separation unit 50 is reduced.

The same phenomenon may occur in piping other than the heat exchanger 44. That is, in other places where the slurry body is heat-treated, such as the heater 45 in the heat treatment section 40, the gasification reactor 46, and their connection piping, there is a possibility that tar is generated and the piping is blocked. is there.

Thus, in the biomass processing system 20 of the present embodiment, not only when the slurry body performs heat treatment under high temperature and high pressure (under a supercritical state) such that the slurry body is gasified by heat exchange with supercritical water, Even when the slurry body is heated under supercritical temperature or pressure conditions (for example, hydrothermal treatment, heat treatment in a subcritical state or a temperature lower than the gasification reaction temperature). The piping in the process may be blocked.

Therefore, in the biomass processing system 20 of the present embodiment, as shown in FIG. 1, the raw material preparation unit 30 is provided with a separation device 31 to separate tar-causing substances from the shochu residue, which is the main raw material, in order to prevent such a situation. Like to do.

That is, the separation device 31 includes a raw material containing a first separated substance (a solid content in this embodiment) containing a large amount of tar-causing substances and no tar-causing substance (or at least less than the first separated substance). ) Separated into a second separated product (liquid component in this embodiment).

The separation device 31 is, for example, a device that separates a raw material into a first separated material and a second separated material based on a difference in specific gravity using gravity or centrifugal force (for example, a stationary storage tank for separating by gravity sedimentation, A centrifuge such as a decanter) or an apparatus (for example, a filter press) that separates the raw material into a second separated product and a second separated product using a filter (for example, the first separated product is separated as a solid phase). And the second separation is separated as a liquid phase). The separation device 31 may be a combination of these devices.

The first separated product (solid content of the shochu residue) separated by the separation device 31 is introduced into the heater 45 of the heat treatment unit 40. The solid content introduced into the heater 45 is heated and dried by exhaust heat in the heater 45 (exhaust heat generated during combustion by the combustion device 45a). Since the solid content after drying contains a lot of protein, it can be used as feed. The dried solid content is stored in the feed tank 47 as feed.

On the other hand, the second separated product (liquid component of shochu residue) separated in the separation device 31 is introduced into the reaction vessel 32. An alkaline aqueous solution (for example, 10 wt% sodium hydroxide aqueous solution) is introduced into the reaction vessel 32, and the alkali treatment of the liquid is performed. That is, in the reaction vessel 32, the separated liquid and the alkaline aqueous solution are mixed, thereby generating a precipitate. The main component of the precipitate is an inorganic substance made of a phosphorus compound such as magnesium phosphate, and is sent to the storage container 36. This phosphorus compound can be reused as a fertilizer raw material.

On the other hand, the solution after the reaction after removing the precipitate (for example, the supernatant) is sent to the preparation tank 33. The post-reaction solution sent to the preparation tank 33 is mixed with activated carbon and water, and the resulting mixture is made into a slurry body by the pulverizer 34 and introduced into the heat treatment section 40 via the supply pump 35.

As described above, the slurry body introduced into the heat treatment unit 40 is in a state in which inorganic substances such as proteins, lipids, dietary fibers, and phosphorus compounds are largely removed by separation by the separation device 31 and alkali treatment in the reaction vessel 32. It has become.

As described above, in the biomass processing system 20 of the present embodiment, the separation apparatus 31 (raw material separation unit) uses organic materials (first first) containing at least one of proteins, lipids, and dietary fibers (such as lignin) from the raw materials. By separating the separated substance (tar-causing substance), it is possible to suppress the generation of tar in various pipes in the process of heat-treating the slurry body generated from the raw material, thereby preventing the pipe from being blocked. Thereby, biomass can be heat-processed efficiently.

Further, the reaction vessel 32 (alkali treatment unit) causes the phosphorus compound (inorganic matter) such as magnesium phosphate from the residue of the first separation (second separation) to be stored in the storage container 36 (precipitation separation unit). By separating, the separated phosphorus compound can be reused as a fertilizer raw material, and resources can be efficiently utilized. Moreover, as can be seen from the fact that the phosphorus compound is precipitated as described above, the shochu residue contains an inorganic substance that forms an inorganic salt. Therefore, the volume of the inorganic material is reduced in the volume of the slurry, and the effect of preventing the blockage of the piping can be expected.

Moreover, since the 1st isolate | separated substance (solid content) isolate | separated from the shochu residue contains high concentration protein, lipid, and dietary fiber, this solid content is heated and dried like the biomass processing system 20 of this embodiment. By doing so, the water can be surely removed, and the dried product can be used as a high-quality feed that is cheap and can be stored for a long time and is rich in nutrients. In addition, drying prevents rot and allows long-term storage, as well as reducing the weight and transportation costs.

Since the heating of the solid matter is performed as the drying unit by the exhaust heat of the exhaust gas of the heater 45, the heat generated in the biomass processing system 20 can be used effectively.

As a method for precipitating the phosphorus compound in the reaction vessel 32, there may be a method of adding an acidic solution instead of an alkaline solution. However, the reason why the alkaline solution is used instead of the acidic solution in the present embodiment is that when the acidic solution is used, this may corrode the metal of the piping such as the heat exchanger 44. In addition, since an alkaline solution such as an aqueous sodium hydroxide solution or potassium hydroxide also acts as a catalyst for hydrothermal treatment in the gasification reactor 46, further improvement in gas yield can be expected.

In addition, since the shochu residue contains a large amount of phosphorus derived from the phosphorus compound and nitrogen derived from the protein, the nitrogen concentration of the drainage discharged in the drainage treatment apparatus 54 is obtained by removing the protein and the phosphorus compound from the shochu residue. (For example, ammonia concentration) and phosphorus concentration (for example, phosphoric acid concentration) can be reduced. Since the discharge of nitrogen and phosphorus into public water bodies and the like causes an environmental load (eutrophication, etc.), according to the biomass processing system 20 of this embodiment, such an increase in the environmental load can be prevented. .

Moreover, in the biomass processing system 20 of this embodiment, it is considered that the following effects are also exhibited. FIG. 3 is a view for explaining the processed fluid flowing in the double pipe 48 of the heat exchanger 44. When the separation by the separation device 31 is performed, the amount of product gas obtained by hydrothermally treating the organic matter is reduced as much as the organic matter that causes tar is removed from the shochu residue. Therefore, as indicated by reference numeral 63, the gas phase portion 61a of the gas-liquid two-phase flow in the processed fluid 61 in the subcritical state also decreases. Accordingly, since the liquid phase portion 61b increases, the heat transfer area of the liquid phase portion 61b that comes into contact with the slurry body 62 (via the piping) increases, and as a result, the post-treatment fluid 61 and the slurry body 62 of the low temperature channel 48a. The amount of exchange heat with the slurry increases, and the slurry body 62 can be efficiently heated. This is because the specific heat of the liquid is larger than that of the gas. Accordingly, since the fuel gas used in the heater 45 and the gasification reactor 46 is reduced, the generated gas can be effectively used in the entire system.

In the biomass processing system 20 of the present embodiment, the separated solid is heated and dried by exhaust heat from the heater 45, but other devices that generate exhaust heat other than the heater 45, for example, The drying of the solid material may be used by using the heat discharged from the gasification reactor 46 or the decompression mechanism 51. Even if comprised in this way, the heat which generate | occur | produces in the biomass processing system 20 is reused effectively.

Second Embodiment
FIG. 4 is a diagram illustrating the configuration of the biomass processing system according to the second embodiment. As shown in the figure, the biomass processing system 20 of the present embodiment includes a raw material preparation unit 30, a heat treatment unit 40, and a gas-liquid separation unit 50, as in the first embodiment.

Since the heat treatment unit 40 and the gas-liquid separation unit 50 are the same as those in the first embodiment, description thereof is omitted. Here, the raw material preparation unit 30 will be described.

The raw material preparation unit 30 is a part for preparing raw materials. The raw material preparation unit 30 includes a reaction vessel 32, a separation device 31, a preparation tank 33, a pulverizer 34, and a supply pump 35. As shown in the figure, the arrangement of the reaction vessel 32 and the separation device 31 is reversed compared to the first embodiment. Specifically, the reaction vessel 32 is arranged on the upstream side, and the separation device 31 is arranged on the downstream side. Has been.

The reaction vessel 32 is a vessel for reacting the shochu residue, which is the main raw material, with an alkaline solution (for example, an aqueous sodium hydroxide solution or an aqueous potassium hydroxide solution). The reaction vessel 32 is charged with the shochu residue and the alkaline solution. Both of them are subjected to alkali treatment of the shochu residue in the reaction vessel 32. A solution obtained by this alkali treatment (hereinafter referred to as a post-treatment solution) is sent to the separation device 31. The treated solution contains proteins, lipids and dietary fibers contained in the shochu residue. On the other hand, the solid matter (precipitate) separated from the post-treatment solution contains a large amount of phosphorus compound, which is stored in the storage container 36. This precipitate can be used as a feed fertilizer or the like.

The separation device 31 separates the treated solution supplied from the reaction vessel 32 into a solid content and a liquid content. Thereby, protein, lipid, and dietary fiber contained in the solution after processing are separated as solids. The separated solid content is introduced into the heater 45 of the heat treatment unit 40. The solid content introduced into the heater 45 is heated and dried using exhaust heat generated by the heater 45. Since the solid content after drying contains a large amount of protein, lipid and dietary fiber, it can be used as feed for livestock. However, it is preferable to neutralize this solid content, that is, to neutralize the substance derived from the alkaline solution used in the alkali treatment described above. The dried solid content is stored in the feed tank 47.

On the other hand, the liquid component separated by the separation device 31 is sent to the preparation tank 33. In the preparation tank 33, the separated liquid, activated carbon, and water are mixed and sent to the pulverizer 34.

The pulverizer 34 and the supply pump 35 are the same as in the first embodiment. The mixture generated in the preparation tank 33 is made into a slurry body by the pulverizer 34 and is introduced into the heat treatment section 40 through the supply pump 35. Then, the slurry body introduced into the heat treatment unit 40 is introduced into the heat exchanger 44.

Thus, in the second embodiment, unlike the first embodiment, the order of separation treatment and alkali treatment is reversed. That is, the alkali treatment is first performed on the shochu residue (reaction vessel 32), and the solution after the alkali treatment is performed and the precipitate is removed is separated into the first separated product and the second separated product ( Separation device 31). Even with such a configuration, the same effect as the first embodiment can be obtained.

<Removal experiment of protein, lipid, dietary fiber, and phosphorus compound>
The inventors have confirmed in the following separation experiment that the causal residue (protein, lipid, and dietary fiber) can be reliably removed from the shochu residue by the configuration of the biomass processing system 20 described above.

<Separation experiment>
This separation experiment is an experiment in which lipids, proteins, and dietary fibers are separated from the shochu residue. FIG. 5 is a diagram for explaining the procedure of the separation experiment. As shown in the figure, a test container 71 for storing a shochu residue and a filtration container 72 were used in this separation experiment.

First, the test vessel 71 charged with the shochu residue 73 (sucrose barley shochu residue) was allowed to stand for about 48 hours and waited for the precipitate 74 to settle. Thereafter, the supernatant liquid of the test container 71 was taken out, and the precipitate 74 remaining at the bottom of the test container 71 was introduced into the filtration container 72.

The filter container 72 is provided with a filter 75 (a wire mesh having a mesh size of 2 mm), and the precipitate 74 described above was introduced into the upper surface of the filter 75. After filtration, the filtered precipitate 76 remaining in the filter 75 was taken out.

FIG. 6 is a diagram showing the analysis results of the shochu residue before the separation experiment, the supernatant obtained in the separation experiment, and the precipitate 76 after filtration. As shown in the figure, in the shochu residue before the separation experiment, pH is 3.8, water is 88.2 g per 100 g of shochu residue, lipid is 0.6 g per 100 g of shochu residue, and protein is 3 per 100 g of shochu residue. 0.8 g and dietary fiber was 1.4 g per 100 g of shochu residue. Moreover, about the supernatant liquid of the test container 71, pH is 4.0, a water | moisture content is 89.8g per 100g of shochu residue, a lipid is less than 0.1g per 100g of shochu residue, a protein is 3.5g per 100g of shochu residue, dietary fiber It was 0.2g per 100g of shochu residue. Regarding the precipitate 76 after filtration, the pH is 4.0, the moisture is 83.4 g per 100 g of the shochu residue, the lipid is 1.6 g per 100 g of the shochu residue, the protein is 4.6 g per 100 g of the shochu residue, and the dietary fiber is 100 g of shochu residue. 4.4g per unit.

As a result of this experiment, the concentration of lipid, protein, and dietary fiber in the liquid after separation treatment is significantly lower than the concentration of lipid, protein, and dietary fiber in the shochu residue before separation treatment. I understand. On the other hand, it can be seen that the precipitate (solid content) after the separation treatment contains high concentrations of lipids, proteins, and dietary fibers. That is, it can be seen that protein, lipid and dietary fiber can be easily separated from the shochu residue.

<Alkali treatment experiment>
Next, the inventors verified whether a phosphorus compound was produced by adding sodium hydroxide to the shochu residue.
FIG. 7 is a diagram for explaining the procedure of the alkali treatment experiment. In the alkali treatment experiment, as shown in (a), 27 ml of 10 wt% sodium hydroxide aqueous solution 83 was added to 500 ml of shochu residue 82 (six-row wheat shochu residue) contained in the reaction vessel 81 and stirred with a stirrer 84. Then, both were reacted. Next, as shown in (b), the solution 85 after the reaction in the reaction vessel 81 was put into a filtration vessel 87 equipped with a filter 86 (particle retention ability 1.0 μm) and filtered. Then, chemical analysis of the precipitate 89 remaining on the filter 86 was performed.

FIG. 8 is a diagram for explaining the analysis result of the precipitate 89 ((a) infrared spectroscopic analysis using a Fourier transform infrared microspectroscopy apparatus, (b) elemental analysis using an energy dispersive X-ray microanalyzer). As shown in FIG. 8A, the precipitate 89 has remarkably oxygen (O), magnesium (Mg), and phosphorus (P) peaks. Moreover, the peak derived from protein or an amino acid is not confirmed.

Further, as shown in FIG. 8B, the mass concentration (%) of oxygen in the precipitate 89 is 52.72%, the mass concentration (%) of magnesium is 6.60%, and the mass concentration (%) of phosphorus is 8.39%. Furthermore, as a result of observation with an optical microscope, the precipitate 89 was a fine crystalline substance having a white translucent to pale yellow color, and a fibrous substance considered to be derived from a filter was mixed.

From the above results, it is considered that the precipitate 89 contains a large amount of phosphorus compound such as magnesium phosphate. Therefore, it can be seen that the phosphorus compound can be precipitated from the shochu residue by subjecting the shochu residue to an alkali treatment.

The above description of the embodiment is intended to facilitate understanding of the present invention and does not limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

For example, the raw material of the biomass may be other than the shochu residue, and may be, for example, egg-collecting chicken manure, sewage sludge or other water-containing biomass.

In this embodiment, water and a catalyst are mixed when the slurry body is generated, but these may not be mixed.

In the present embodiment, the first separated product has a solid content, but the first separated product may not have a solid content. Even in such a case, a centrifuge or the like is appropriately used as the separation device 31. Separation is possible by using it. Similarly, separation is possible even when the second separation is not liquid.

Further, the heat source for heating the first separated matter may be the waste heat of the biomass processing system 20 other than the exhaust gas of the heater 45 or the waste heat of equipment such as a separately installed steam boiler.

Moreover, although the form in the biomass processing system which gasifies biomass (shochu residue) was demonstrated in this embodiment, this invention is applicable even when performing heat processing other than gasification. For example, even when a heating device other than the heat exchanger is present, blockage of piping due to tar in the device can be prevented. Even when hydrothermal treatment is performed at a temperature equal to or lower than the gasification reaction temperature, blockage of the piping can be prevented and the hydrothermal treatment can be performed efficiently.

1 biomass treatment system, 3 heating unit, 4 gas-liquid separation unit, 5 heat exchanger, 6 heating mechanism, 7 double tube, 8 slurry body, 9 low temperature side channel, 11 supercritical fluid, 12 high temperature side channel, 13 tar, 20 biomass processing system, 30 raw material preparation unit, 31 separator, 32 reaction vessel, 33 preparation tank, 34 grinder, 35 supply pump, 36 storage container, 40 heat treatment unit, 43 high pressure pump, 44 heat exchanger, 45 heater, 45a combustion device, 46 gasification reactor, 46a combustion device, 47 feed tank, 48 double tube, 48a low temperature flow channel, 48b high temperature flow channel, 50 gas-liquid separator, 51 pressure reducing mechanism, 52 gas liquid Separator, 53 gas tank, 54 drainage treatment device, 61 post-treatment fluid, 61a gas phase portion, 61b liquid phase portion, 62 slurry -Body, 71 test vessel, 72 filtration vessel, 73 shochu residue, 74 precipitate, 75 filter, 76 precipitate after filtration, 81 reaction vessel, 82 shochu residue, 83 sodium hydroxide aqueous solution, 84 stirrer, 85 after reaction Solution, 86 filter, 87 filtration container, 88 filtrate, 89 precipitate

Claims

A biomass processing system for heat-treating a slurry body generated from a raw material containing biomass,
A raw material separation unit that separates an organic substance containing at least one of protein, lipid, and dietary fiber from the raw material as a first separated product, and a residue after the first separated product is separated by the raw material separating unit. An alkaline treatment unit that reacts by adding an alkaline solution to the second separated product, and a precipitate separation unit that separates a precipitate generated by the reaction in the alkaline treatment unit,
The biomass processing system which produces | generates the said slurry body with the solution after isolate | separating the said deposit.
The biomass processing system according to claim 1, further comprising a drying unit that dries the first separated matter.
The biomass processing system according to claim 2, wherein the drying unit heats and drys the first separated matter.
A heater for heating the slurry body;
The biomass processing system according to claim 2 or 3, wherein the drying unit heats and drys the first separated material separated in the raw material separation unit by exhaust heat from the heater.
The biomass treatment system according to any one of claims 1 to 4, wherein the alkaline solution is an aqueous solution containing sodium hydroxide or potassium hydroxide.