JP7049635B1 - Solid-liquid separator, manufacturing method of raw materials for fuel and manufacturing method of food materials - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid-liquid separation device capable of drying a processing raw material efficiently and at low cost, a method for producing a raw material for fuel, and a method for producing a food material. SOLUTION: A raw material drying unit 10 is used to dry while transporting a processed raw material, and a heat pump is used to remove water from the moist air recovered from the raw material drying unit 10 to dry the raw material and change it into dry air. The air treatment unit 20 has an air treatment unit 20 for supplying dry air to 10, and the air treatment unit 20 cools the moist air using the heat of vaporization generated by the heat pump and condenses the water vapor contained in the moist air. It is characterized by having a cooling unit 21 for draining moist air and a heating unit 22 for heating the air drained by the cooling unit 21 with the heat of condensation generated by a heat pump and supplying it to the raw material drying unit 10. A solid-liquid separator. [Selection diagram] Fig. 1

Description

The present invention is a solid-liquid separation device for producing a processing raw material having a low water content by separating water (liquid content) from the processing raw material from the solid content, and a method for producing a raw material for fuel and a food product using the same. Regarding the manufacturing method of materials.

In recent years, as the importance of preserving and maintaining the global environment has increased, the inventors have stated in Patent Document 1 that woody materials, biologically-derived organic resources, vegetation, etc. generated from wood processing plants, waste intermediate treatment plants, etc. Disclosure of technology to semi-carbonize or carbonize processing raw materials such as algae, swill, chicken manure, livestock manure, city sludge, manure sludge, construction waste, food waste, and carbon-containing waste plastic with high efficiency and use them as fuel. There is.

Japanese Patent No. 6729906

In Patent Document 1, the combustion gas generated in the combustion furnace is used to dry the processed raw material, and then the dried processed raw material is semi-carbonized or carbonized. However, the treated raw material such as sludge and food waste containing a large amount of water is used. When the fuel is added as it is, a large amount of energy is required to dry the raw material for processing, and there is a problem that fuel cannot be produced with high efficiency. Therefore, there has been a demand for a solid-liquid separation device capable of drying a processing raw material at a lower cost and higher efficiency than using a combustion gas.

An object of the present invention is to provide a solid-liquid separation device capable of drying a processing raw material efficiently and at low cost, a method for producing a raw material for fuel, and a method for producing a food material.

The solid-liquid separation device according to the present invention has a raw material drying unit that dries while transporting the processed raw material by contacting the processed raw material with dry air and absorbing the moisture of the processed raw material into the dry air to change it into moist air . A heat pump mechanism including a heater that heats the air with the compression heat of compressing the refrigerant and a cooler that cools the air with the heat of vaporization of the compressed refrigerant is arranged, and the heat of vaporization generated by the heat pump mechanism is provided. And the air treatment unit that supplies the dry air to the raw material drying unit after removing water from the moist air recovered from the raw material drying unit and drying it to change to the dry air using both the heat of condensation and the heat of condensation. The air treatment unit has a cooling unit for draining the moist air by cooling the moist air with the cooler and condensing water vapor contained in the moist air, and a cooling unit for removing the moist air. It is characterized by having a heating unit for heating the air drained from the cooling unit by the heater and supplying the watered air to the raw material drying unit.
In the solid-liquid separation device, the raw material drying section has a pair of screw conveyors arranged in parallel in the horizontal direction, and the processing raw material is generated by the air processing section while stirring the processing raw material with the pair of screw conveyors. It can be configured to dry the processing raw material by bringing it into contact with the dry air.
The solid-liquid separation device has a pipe that connects the raw material drying unit and the air processing unit, and a fan that circulates air between the raw material drying unit and the air processing unit via the pipe. The fan is arranged between the raw material drying section and the cooling section of the air processing section, and blows air from the raw material drying section toward the air processing section to create a negative pressure in the raw material drying section. It can be configured to be a condition.
In the solid-liquid separation device, the heating unit may have a plurality of heaters, and the temperature and relative humidity of the dry air supplied to the raw material drying unit may be set to 50 ° C. or higher and 15% or lower. can.
In the solid-liquid separation device, the cooling unit can be configured to have one or more coolers and a heater for preventing icing on the coolers.
In the solid-liquid separation device, the cooling unit has a plurality of coolers, and the fin size of each cooler can be configured to have a diameter of 20 cm or less.
In the solid-liquid separation device, the cooling unit can be configured to cool the moist air recovered from the raw material drying unit to 10 ° C. or lower.
In the solid-liquid separation device, the processing raw material is wood material, biological organic resources, plants, algae, food waste, chicken manure, livestock manure, urban sludge, human waste sludge, construction waste material, food waste, or waste plastic. It can be configured to be.
The method for producing a raw material for fuel according to the present invention is characterized in that the raw material for fuel, which is the source of fuel, is produced by drying the processed raw material using the solid-liquid separation device.
In the method for producing a food material according to the present invention, the processed raw material is a squeezed residue of vegetables and fruits, and the processed raw material is dried using the solid-liquid separation device to contain nutrients from the squeezed residue. It is characterized by manufacturing.

According to the present invention, it is possible to generate dry air for drying the processing raw material by using both the heat of vaporization and the heat of condensation generated by the heat pump, so that the processing raw material can be dried efficiently and at low cost. can.

It is a block diagram of the solid-liquid separation apparatus which concerns on this embodiment. (A) is a top view of the raw material drying part according to the present embodiment, and (B) is a right side view of the raw material drying part according to the present embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration schematic diagram showing a solid-liquid separation device 1 according to the present embodiment. As shown in FIG. 1, the solid-liquid separation device 1 according to the present embodiment dries the raw material drying unit 10 that dries while transporting the processed raw material and the moist air discharged from the raw material drying unit 10 to dry the dry air. It is composed of an air processing unit 20 that is generated and supplies the generated dry air to the raw material drying unit 10. Each configuration will be described below. In FIG. 1, the circulation of air between the raw material drying unit 10 and the air processing unit 20 is indicated by black and gray arrows. The black arrow represents moist air, and the gray arrow represents dry air.

As shown in FIGS. 1 and 2, the raw material drying unit 10 according to the present embodiment is composed of three kilns 11, 12, and 13 arranged side by side in the vertical direction. 2 (A) is a top view of the raw material drying unit 10 according to the present embodiment, and FIG. 2 (B) is a right side view of the raw material drying unit 10 according to the present embodiment. Further, in FIGS. 1 and 2, for convenience of explanation, a pair of screw conveyors installed inside are illustrated.

The first kiln 11 has a charging hopper 111, and the processing raw material before drying can be charged into the first kiln 11 from the charging hopper 111. Further, as shown in FIGS. 2A and 2B, the first kiln 11 has a pair of screw conveyors 112 and 113, and by rotating the pair of screw conveyors 112 and 113, the first kiln 11 is first. It is possible to convey the processing raw material charged into the kiln 11 from the charging hopper 111 to the first chute 114 while stirring. Then, the processing raw material conveyed to the first chute 114 drops the first chute 114 and is charged into the second kiln 12.

Like the first kiln 11, the second kiln 12 has a pair of screw conveyors 122 and 123, and by rotating the pair of screw conveyors 122 and 123, the processing raw material charged into the second kiln 12 is used. Can be conveyed to the second chute 124 while stirring. Then, the processing raw material conveyed to the second chute 124 falls down the second chute 124 and is charged into the third kiln 13. Similarly, the third kiln 13 also has a pair of screw conveyors 132 and 133, and by rotating the pair of screw conveyors 132 and 133, the processing raw materials charged into the third kiln 13 are discharged while being agitated. It can be transported to the outlet 134 and discharged to the outside from the discharge port 134.

In the first kiln 11, the second kiln 12, and the third kiln 13, the rotation directions of the pair of screw conveyors 112, 113, 122, 123, 132, 133 are not particularly limited, but they are rotated as follows. Can be done. That is, when the pair of screw conveyors are viewed from the transport source side to the transport destination side of the processing raw material, the screw conveyors 112, 122, 132 located on the left side are rotated counterclockwise to the right side. The screw conveyors 112, 122, and 132 located at the above can be rotated clockwise (clockwise). As a result, the processing raw material can be agitated so as to diffuse from the center side to the outer peripheral side of the kiln on the upper side of the kiln where the drying air is introduced, and the drying efficiency of the processing raw material can be further improved. Further, the rotation of the pair of screw conveyors 112, 113, 122, 123, 132, 133 is performed by the motors 117, 127, 137 installed in each kiln 11, 12, 13.

Further, the raw material drying unit 10 communicates with the air processing unit 20 via the pipes 30 and 40, and the high temperature (for example, about 60 ° C.) dry air generated by the air processing unit 20 is the raw material drying unit 10. Is supplied to. Specifically, the first kiln 11 has an air introduction port 115 for introducing dry air from the air treatment unit 20, and similarly, the second kiln 12 and the third kiln 13 have dry air from the air treatment unit 20. It has air inlets 125 and 135 for introducing air. Then, the dry air supplied from the air treatment unit 20 passes through the pipe 30 and is supplied from the air inlets 115, 125, 135 of the kilns 11, 12, 13 to the inside of the kilns 11, 12, 13 respectively. Will be done.

In the solid-liquid separation device 1 according to the present embodiment, as shown in FIG. 1, the air introduction ports 115, 125, 135 are arranged on the transport destination side of the first kiln 11, the second kiln 12, and the third kiln 13. Exhaust ports 116, 126, 136 are arranged on the transport source side of the first kiln 11, the second kiln 12, and the third kiln 13. As a result, the dry air introduced into the inside of the first kiln 11, the second kiln 12, and the third kiln 13 by the air introduction ports 115, 125, 135 first comes into contact with the processing raw material on the transport destination side. It can absorb the moisture of the processing raw material. Therefore, the processing raw material on the transport destination side, which has a longer drying time and is drier (in other words, the processing material that is difficult to dry because it is dried to some extent), can be further dried with drier dry air. For example, as compared with the case where a plurality of nozzles of the air introduction port 115 are arranged in the entire kiln, it is possible to reduce the moisture content of the processing raw material finally discharged from the raw material drying unit 10. In particular, in the present embodiment, when an unused lumber chip having a water content of about 45% is treated as a raw material for treatment, the water content can be reduced to less than 20%, preferably less than 15%. The solid-liquid separation device 1 is configured.

By contacting the processing raw material inside the first kiln 11, the second kiln 12, and the third kiln 13, the dry air absorbs moisture from the processing raw material and changes to moist air. Then, the moist air is discharged to the pipe 40 from the exhaust ports 116, 126, 136 of the first kiln 11, the second kiln 12, and the third kiln 13. Further, the moist air passes through the pipe 40, is collected by the air processing unit 20, and is converted into dry air by the air processing unit 20, as will be described later.

In the raw material drying section 10, the lengths of the three kilns 11, 12, and 13 are not particularly limited, but are 8 m to 12 m in the present embodiment. The inner widths of the kilns 11, 12, and 13 are also not particularly limited, but are 0.5 m to 2.0 m in the present embodiment.

Next, the air processing unit 20 will be described. The air treatment unit 20 is spatially continuous via the raw material drying unit 10 and the pipe 40, and the cooling unit 21 into which moist air is introduced from the raw material drying unit 10 and the space via the raw material drying unit 10 and the pipe 30. It has a heating unit 22 that is continuously continuous and provides dry air to the raw material drying unit 10. Further, the cooling unit 21 and the heating unit 22 are also in communication with each other, and air flows from the cooling unit 21 to the heating unit 22 by the action of the fan 60.

The cooling unit 21 has a first cooler 23 and a second cooler 24, and the first cooler 23 and the second cooler 24 cool the moist air recovered from the raw material drying unit 10. Further, the heating unit 22 has a first heater 25 and a second heater 26, and the first heater 25 and the second heater 26 heat the air cooled by the cooling unit 21.

Here, when the moist air is cooled in the cooling unit 21, the saturated water vapor amount of the air decreases, so that the water vapor contained in the moist air condenses and is discharged as distilled water from a drain (not shown). Become. In particular, in the present embodiment, by cooling the air temperature to 3 to 10 ° C. using a plurality of coolers 23 and 24, for example, wet air having a temperature of about 60 ° C. and a relative humidity of about 80%. It is possible to change to air having a temperature of about 10 ° C. and a relative humidity of about 98%. At the time of dew condensation, the water vapor that can be contained in the air at that temperature is saturated, and the relative humidity is logically 100%.

Further, in the heating unit 22, the air cooled by the cooling unit 21 is heated. When the air cooled by the cooling unit 21 is heated by the heating unit 22, the saturated water vapor amount of the air increases, so that the relative humidity decreases and high-temperature dry air is generated. In particular, in the present embodiment, by heating the air cooled by the cooling unit 21 using a plurality of heaters 25 and 26, the temperature is 50 ° C. or higher, preferably 60 ° C. or higher, and the relative humidity is high. It is possible to generate 20% or less, preferably 15% or less of dry air. For example, when the moist air is cooled to 4 ° C. in the cooling unit 21 and the relative humidity at 4 ° C. is 98%, the air is heated to 50 ° C. in the heating unit 22 to achieve a relative humidity of 6.5. % Dry air can be produced (note that at 34 ° C, the relative humidity is 57%). Further, the heating unit 22 can be configured to utilize waste heat, and by further raising the temperature of the dry air by utilizing the waste heat, the relative humidity of the dry air is further lowered and the drying efficiency is improved. be able to.

Further, in the solid-liquid separation device 1 according to the present embodiment, the first cooler 23 and the second cooler 24 included in the cooling section 21 and the first heater 25 and the second heater 26 included in the heating section 22 are provided. , Each of which is characterized by constituting a heat pump mechanism. Specifically, the first cooler 23 and the first heater 25 are connected to each other by a pipe through which the refrigerant circulates, and together with the first pressure reducing valve 27 and the first compressor 29 installed on the pipe, the first 1 Heat pump mechanism is configured. Similarly, the second cooler 24 and the second heater 26 are connected to each other by a pipe through which the refrigerant circulates, and together with the second pressure reducing valve 28 and the second compressor 210 installed on the pipe, the second heat pump. It constitutes a mechanism.

In the first heat pump mechanism, the first pressure reducing valve 27 is arranged between the first cooler 23 and the first heater 225, and the refrigerant (compression medium) flowing from the first heater 25 to the first cooler 23. Is depressurized and sublimated to generate heat of vaporization, and the first cooler 23 is cooled by the refrigerant cooled by the heat of vaporization. Further, the first compressor 29 is arranged between the first cooler 23 and the first heater 25, and compresses the refrigerant flowing from the first cooler 23 to the first heater 25 to heat the condensation. Is generated, and the first heater 25 is heated by the refrigerant heated by the heat of condensation. Similarly, in the second heat pump mechanism, the second pressure reducing valve 28 is arranged between the second cooler 24 and the second heater 26, and cools the second cooler 24 with the refrigerant cooled by the heat of vaporization. Then, the second compressor 210 is arranged between the second cooler 24 and the second heater 26, and heats the second heater 26 with the refrigerant heated by the heat of condensation.

As described above, in the present embodiment, the first heat pump mechanism and the second heat pump mechanism can improve the energy efficiency of drying by converting the moist air into dry air by using both the heat of condensation and the heat of vaporization. can. Further, in the present embodiment, microheaters are provided for each of the first cooler 23 and the second cooler 24, and the freezing of the first cooler 23 and the second cooler 24 is effectively prevented. Is possible. Further, in the present embodiment, rather than having one large cooler, a plurality of relatively small coolers 23, 24 are provided, and the fan of each cooler 23, 24 is made smaller (for example, the fan has a diameter of 30 cm). The energy efficiency for cooling the moist air in the cooling unit 21 is enhanced by the following (preferably 20 cm or less in diameter). Further, the coolers 23 and 24 may be configured not to have a fan. Even when the coolers 23 and 24 do not have a fan, it is possible to reduce the moist air to 10 ° C. or lower by design.

Further, in the present embodiment, a dust collector 50 such as a bag filter is provided in the middle of the pipe 40 to prevent insects and processing raw materials from invading the air processing unit 20. Further, a fan 60 is arranged between the raw material drying unit 10 and the air processing unit 20, and the fan 60 blows air to circulate air between the raw material drying unit 10 and the air processing unit 20. Is being done. Specifically, due to the action of the fan 60, the dry air generated in the air processing unit 20 is provided from the heating unit 22 to the raw material drying unit 10 via the pipe 30, and comes into contact with the processed raw material in the raw material drying unit 10. Then, it absorbs moisture from the processing raw material and changes to moist air. Then, the moist air changed from the dry air is discharged from the raw material drying unit 10 and recovered to the cooling unit 21 of the air processing unit 20 via the pipe 40. Further, in the present embodiment, the fan 60 is arranged between the raw material drying unit 10 and the cooling unit 21 of the air processing unit 20, so that the force for sucking the air of the raw material drying unit 10 is applied to the raw material drying unit 10. It works stronger than the force to supply the raw material, and the inside of the raw material drying unit 10 can be in a negative pressure state. As a result, it is possible to effectively prevent the odor of the processed raw material in the raw material drying unit 10 from leaking to the outside from the raw material drying unit 10.

Next, an operation example of the solid-liquid separation device 1 according to the present embodiment will be described. In the solid-liquid separation device 1 according to the present embodiment, when the power of the solid-liquid separation device 1 is turned on, the fan 60 operates and the circulation of air between the raw material drying unit 10 and the air processing unit 20 is started. .. Further, when the power is turned on, the first motor 117 of the first kiln 11, the second motor 127 of the second kiln 12, and the third motor 137 of the third kiln 13 operate, and the pair of screw conveyors 112 of the first kiln 11 operate. , 113, the pair of screw conveyors 122 and 123 of the second kiln 12, and the pair of screw conveyors 132 and 133 of the third kiln 13 start to rotate. Further, when the power is turned on, the operation of the first heat pump mechanism and the second heat pump mechanism of the air processing unit 20 is started, the moist air is cooled by the coolers 23 and 24, and the dry air is generated by the heaters 25 and 26. Will be done. Then, the dry air generated by the air treatment unit 20 is provided to the raw material drying unit 10 via the pipe 30 by the action of the fan 60, absorbs moisture from the processing raw material, and changes to moist air. , Collected by the air processing unit 20 via the pipe 40.

Therefore, when the processing raw material is charged into the charging hopper 111 of the first kiln 11, the processing raw material comes into contact with the dry air while being conveyed in the first kiln 11 and gradually dries. Further, in the present embodiment, the processing raw material is conveyed in the first kiln 11 and then falls from the first chute 114 and is charged into the second kiln 12, and the second kiln 11 is similarly the same as the first kiln 11. While being conveyed in the kiln 12, it comes into contact with dry air to further dry it. Further, after the second kiln 12 is conveyed, the processing raw material falls from the second chute 124 and is thrown into the third kiln 13, and while being conveyed in the third kiln 13, it comes into contact with dry air and is further dried. This is done, and the air is discharged to the outside from the discharge port 134 of the third kiln 13.

Further, in the present embodiment, in each of the kilns 11, 12, and 13, air introduction ports 115, 125, 135 are arranged on the transport destination side, and exhaust ports 116, 126, 136 are arranged on the transport source side. Dry air is supplied from the front side, and moist air is discharged from the transport source side. Therefore, when the processed raw material is transported in each of the kilns 11, 12, and 13, the processed raw material that has been dried for a longer time can come into contact with the drier dry air, so that the degree of drying can be increased. It is possible.

As described above, in the solid-liquid separation device 1 according to the present embodiment, the air treatment unit 20 has a heat pump mechanism, and the coolers 23 and 24 of the cooling unit 21 cool the moist air using the heat of vaporization and moisten it. By condensing the water vapor contained in the air, the moist air is dried, and at the same time, the heat of condensation is used in the heaters 25 and 26 of the heating unit 22 in the heat pump mechanism to heat the dried air in the cooling unit 21. , Supply to the raw material drying unit 10. As described above, in the solid-liquid separation device 1 according to the present embodiment, since dry air can be generated by using both the heat of vaporization and the heat of condensation generated by the heat pump mechanism, the processing raw material can be produced at low cost and high efficiency. Can be dried.

For example, the solid-liquid separator 1 according to the present embodiment has less energy loss and higher drying efficiency with respect to power consumption than a hot air dryer or a refrigerating dryer that uses fossil fuels such as petroleum and gas. It is possible to reduce the running cost to about 2/3 to 1/3. Further, in the drying method using the heat pump mechanism according to the present embodiment, the hot air type drying in which the high temperature combustion exhaust gas is brought into direct contact with the processing raw material to raise the processing raw material (moisture contained in the processing raw material) to 100 ° C. and dried. Compared to the hot air type drying method, which exchanges heat between high temperature combustion exhaust gas and normal temperature air and brings hot hot air into contact with the processing raw material to dry it, the initial cost is reduced by about 10 to 50%. be able to. Further, in the drying method according to the present embodiment, the running cost is reduced by half to 1 as compared with the heating steam type drying method in which the heated steam is directly brought into contact with the treatment raw material to dry it, and the hot air type or hot air type drying method. It can be lowered to about / 3. This is because in the heating steam type, hot air type, and hot air type drying method, the vaporized steam is usually discharged to the outside as it is by a chimney or the like, which causes a large energy loss.

Further, in the present embodiment, the raw material drying unit 10 has a pair of screw conveyors 112, 113, 122, 123, 132, 133 that are parallel in the horizontal direction, and a pair of screw conveyors 112, 113, 122, 123, 132. , 133, while the processing raw material is conveyed, the processing raw material is brought into contact with the dry air generated by the air processing unit 20 to dry the processing raw material. As described above, in the present embodiment, since the processing raw material is conveyed while being stirred by the pair of screw conveyors 112, 113, 122, 123, 132, 133, the entire processing raw material is brought into contact with the dry air relatively uniformly. It is also possible to further improve the drying efficiency of the processing raw material.

Further, in the present embodiment, the fan 60 is arranged between the raw material drying unit 10 and the cooling unit 21 of the air processing unit 20, and blows air from the raw material drying unit 10 toward the air processing unit 20 (raw material). By sucking the air from the drying unit 10), the inside of the raw material drying unit 10 is under negative pressure conditions. This effectively prevents the odor of the processed raw material charged into the raw material drying unit 10 from the charging hopper 111 and foreign substances such as water vapor and gas from leaking into the air from the charging hopper 111 and the discharge port 134. can do. Further, since the solid-liquid separation device 1 is an air circulation type and has a high airtightness, the quiet performance can be improved as compared with the conventional case. Further, since the solid-liquid separation device 1 according to the present embodiment is a closed circulation system, it is hardly discharged except for the recovery of distilled water, and the generation of bad odor can be almost eliminated.

Further, in the present embodiment, the heating unit 22 has a plurality of heaters 25 and 26, and the relative humidity of the dry air supplied to the raw material drying unit 10 is 20% or less, preferably 15% or less. As a result, the moisture content of the processing raw material after drying can be significantly reduced, and the efficiency of the heat treatment after drying can be improved. For example, in the solid-liquid separation device 1 according to the present embodiment, papermaking sludge having a moisture content of 60 to 70% is dried to a moisture content of about 15 to 20%, and then the dried papermaking sludge is used as fuel. It is possible to greatly improve the treatment efficiency related to the heat treatment to be changed. Further, in the present embodiment, the cooling unit 21 has a plurality of coolers 23, 24, and each has a micro heater for preventing icing of the coolers 23, 24. This makes it possible to efficiently bring the moist air into contact with the coolers 23 and 24 for cooling. In addition, the cooling unit 21 has a plurality of coolers 23, 24, and the fin size of each of the coolers 23, 24 is 20 cm or less in diameter, so that the fin size exceeds 20 cm in diameter for large cooling. It is also possible to increase the energy efficiency required for cooling the entire cooler 21 as compared with the case where one device is provided.

Although the preferred embodiment of the present invention has been described above, the technical scope of the present invention is not limited to the description of the above embodiment. Various changes and improvements can be added to the above-described embodiments, and those in which such changes or improvements have been made are also included in the technical scope of the present invention.

In the heating unit 22, the configuration including the heaters 25 and 26 constituting the heat pump mechanism is exemplified, but in addition to this configuration, a desiccant for further drying the dry air may be further provided. ..

1 ... Solid-liquid separation device 10 ... Raw material drying unit 11 ... 1st kiln 111 ... Input hopper 112, 113 ... Screw conveyor 114 ... 1st chute 115 ... Air inlet 116 ... Exhaust port 117 ... 1st motor 12 ... 2nd kiln 122, 123 ... Screw conveyor 124 ... 2nd chute 125 ... Air inlet 126 ... Exhaust port 127 ... 2nd motor 13 ... 3rd kiln 132, 133 ... Screw conveyor 134 ... Discharge port 135 ... Air inlet 136 ... Exhaust port 137 ... 3rd motor 20 ... Air processing unit 21 ... Cooling unit 23 ... 1st cooler 24 ... 2nd cooler 27 ... 1st pressure reducing valve 28 ... 2nd pressure reducing valve 22 ... Heating unit 25 ... 1st heater 26 ... 1st 2 Heater 29 ... 1st compressor 210 ... 2nd compressor 30 ... Piping 40 ... Piping 50 ... Dust collector 60 ... Fan

Claims (10)

A raw material drying unit that dries while transporting the processed raw material by contacting the processed raw material with dry air and absorbing the moisture of the processed raw material into the moist air to change it into moist air .
A heat pump mechanism including a heater that heats the air with the compression heat of compressing the refrigerant and a cooler that cools the air with the heat of vaporization of the compressed refrigerant is arranged, and the heat of vaporization generated by the heat pump mechanism is provided. And the air treatment unit that supplies the dry air to the raw material drying unit after removing water from the moist air recovered from the raw material drying unit and drying it to change to the dry air using both the heat of condensation and the heat of condensation. Have,
The air treatment unit is
A cooling unit that drains the moist air by cooling the moist air with the cooler and condensing water vapor contained in the moist air.
A solid-liquid separation device comprising a heating unit that heats the air drained from the cooling unit by the heater and supplies the air to the raw material drying unit. The raw material drying section has a pair of screw conveyors arranged in parallel in the horizontal direction.
The solid-liquid separation device according to claim 1, wherein the processing raw material is dried by bringing the processing raw material into contact with the dry air generated by the air processing unit while stirring the processing raw material with the pair of screw conveyors. A pipe that communicates the raw material drying section and the air processing section,
It has a fan that circulates air between the raw material drying section and the air processing section via the piping.
The fan is arranged between the raw material drying unit and the cooling unit of the air processing unit, and blows air from the raw material drying unit toward the air processing unit to create a negative pressure condition in the raw material drying unit. The solid-liquid separation device according to claim 1 or 2, which is described below. The solid according to any one of claims 1 to 3, wherein the heating unit has a plurality of heaters, and the temperature and relative humidity of the dry air supplied to the raw material drying unit are 50 ° C. or higher and 15% or lower. Liquid separator. The cooling unit is
With one or more coolers,
The solid-liquid separation device according to any one of claims 1 to 4, further comprising a heater for preventing icing on the cooler. The solid-liquid separation device according to any one of claims 1 to 5, wherein the cooling unit has a plurality of coolers, and the fin size of each cooler is 20 cm or less in diameter. The solid-liquid separation device according to any one of claims 1 to 6, wherein the cooling unit cools the moist air recovered from the raw material drying unit to 10 ° C. or lower. Claims 1 to 7 where the processing raw material is wood material, biological organic resources, plants, algae, swill, chicken manure, livestock manure, urban sludge, human waste sludge, construction waste material, food waste, or waste plastic. The solid-liquid separation device according to any one of. A method for producing a raw material for fuel, which comprises drying the raw material for processing using the solid-liquid separating apparatus according to any one of claims 1 to 8, to produce a raw material for fuel which is a source of fuel. .. The processing raw material is a squeezed residue of vegetables and fruits.
A method for producing a food material, which comprises drying the processing raw material using the solid-liquid separation apparatus according to any one of claims 1 to 8 to produce a food material containing nutrients from the squeezed residue. ..

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