A hydrothermal carbonization device

Abstract

The present invention relates to a hydrothermal carbonization device, which solves the problem that the existing hydrothermal carbonization device has high requirements for the sealing of the stirring shaft, and the carbon accumulated on the shaft rod and blades of the stirring shaft is not easy to clean, which seriously affects the detection of the components of the final product. The device includes a frame, on which a hydrothermal carbonization tank with an upward opening is mounted, a cover body is buckled above the hydrothermal carbonization tank, a magnetic transmission coupling is arranged at the center of the cover body, a motor connected to the input end of the magnetic transmission coupling is arranged above the cover body, and a stirrer connected to the output end of the magnetic transmission coupling is arranged below the cover body, the stirrer is a spiral blade without a central axis, and a hoisting device is also arranged on the top of the frame, and a coil with an alternating current passing through an annular winding is arranged around the circumference above the cover body, the axis of the coil coincides with the axis of the magnetic transmission coupling, and the inner diameter of the coil is larger than the outer diameter of the cover. The present invention can fully clean the agitator adhesion of the hydrothermal carbonization tank, and ensure the accuracy of the test results when the hydrothermal carbon is prepared in the test.

Description

Technical Field

[0001] The invention belongs to the field of biochar and relates to a hydrothermal carbonization device. Background Art

[0002] Hydrothermal carbonization is a process in which biochar is obtained by hydrothermal reaction at 150℃-375℃ and different pressures using biomass or its components as raw materials and water as solvent and reaction medium. The hydrothermal carbonization device is usually a sealed carbonization tank. When the carbonization tank is closed, the purpose of biomass carbonization can be achieved by heating and pressurizing. During the reaction, the temperature in the carbonization tank can reach more than 150 degrees and the pressure can be more than 10 atmospheres. Due to the high-pressure environment in the carbonization tank, the fewer openings on the tank body, the better the sealing can be maintained. The suspension in the carbonization tank is prone to precipitation when it is left standing for a long time, resulting in solid agglomeration, which is not conducive to the full carbonization of biomass and the formation of carbon products. However, due to the high-pressure conditions in the carbonization tank, when the rotating shaft is set to pass through the tank body or the cover body for stirring in the carbonization tank, the sealing requirements at the penetration of the rotating shaft are high, the rotation resistance is large, and there is a risk of leakage and overflow. Moreover, the commonly used tank body rotating shaft is usually a shaft, and a set of blades is set at the lower part of the shaft or multiple sets of blades are set at different heights for stirring. The carbonized groups produced by hydrothermal carbonization easily adhere to the shaft, blades, and the boundary between the shaft and blades. After long-term use, the carbon deposits become thicker and difficult to clean. When used as a test device, it seriously affects the composition detection of the final product. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that the sealing requirements of the stirring shaft of the existing hydrothermal carbonization device are high, the carbon deposits on the shaft rod and blades of the stirring shaft are difficult to clean, and the final product component detection is seriously affected. A hydrothermal carbonization device is provided to realize a partition-type magnetic transmission, improve the sealing effect of the rotating shaft, reduce carbon deposits, and clean the carbon deposits.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a hydrothermal carbonization device, including a frame, a hydrothermal carbonization tank with an upward opening is arranged on the frame, the hydrothermal carbonization tank includes an inner tank body and an outer tank body, and a heat insulation layer is sandwiched between the inner tank body and the outer tank body, characterized in that: a cover body is buckled on the top of the hydrothermal carbonization tank, a magnetic transmission coupling is arranged at the center of the cover body, a motor connected to the input end of the magnetic transmission coupling is arranged above the cover body, a stirrer connected to the output end of the magnetic transmission coupling is arranged below the cover body, and the stirrer is a spiral blade without a central axis. A hoisting device for driving the cover body to rise and fall is also arranged on the top of the frame, and a coil connected to an alternating current with an annular winding is arranged around the top of the cover body, the axis of the coil coincides with the axis of the magnetic transmission coupling, and the inner diameter of the coil is larger than the outer diameter of the cover. The internal working temperature of the hydrothermal carbonization tank can reach more than 150 degrees Celsius, and the internal pressure may reach more than 10-100 times the atmospheric pressure. Therefore, the sealing requirements of the tank body are very high. This device uses a magnetic transmission coupling, which uses magnetic transmission to drive the internal agitator to rotate the external power. A partition is provided inside the magnetic transmission coupling to block the inside and outside to ensure sealing. The hydrothermal carbonization tank has a long carbonization time, so it is necessary to stir regularly to avoid material agglomeration and precipitation. The agitator extends below the liquid level in the tank, and the carbonization product is easy to adhere to the agitator. For traditional shaft stirrers, blades are set on the shaft. Carbonized materials are most likely to accumulate at the junction of the shaft and the blades, and it is extremely difficult to clean due to the existence of the angle. However, if it is not cleaned, the accumulated carbonized materials are easy to dissolve during the next carbonization. The above phenomenon has no effect on multiple hydrothermal carbonization of the same material, but different raw materials, different temperatures and pressure conditions need to be tested in the test phase. The dissolution of carbonized materials that were not cleaned last time will affect the subsequent carbonization products, resulting in test deviations. The device adopts spiral blades without a central axis, and there is no intersection angle between the shaft and the blades. Therefore, even if the carbonized products adhere, there is no dead angle and it is easy to clean. In addition, the device arranges a coil circumferentially above the cover body. When the cover body is raised, the coil is flush with the spiral blades. The coil passes a high-frequency alternating current to form an oscillating magnetic field. The spiral blades are thin sheets. Since there is no central axis support, a high-frequency changing induced current is generated in the oscillating magnetic field, causing the spiral blades to heat up and vibrate with a small amplitude and high frequency. After 30 seconds to 5 minutes as needed, the adhesion of the carbonized products can be reduced, and the adhered carbonized products can be cleaned by subsequent flushing with a water gun.

[0005] Preferably, a directional ultrasonic generator is provided on the frame above and / or below the coil and facing the center point of the coil. The ultrasonic generator has good directional performance and can impact the carbonized product on the surface of the spiral blade to vibrate and loosen it. The vibration effect generated by the ultrasonic wave and the vibration effect of the magnetic field oscillation have different frequencies, so that the carbonized product and the spiral blade are in different vibration states, making them easier to separate.

[0006] Preferably, the hoisting device is a hydraulic or motor-driven lifting rod, or the hoisting device is a hoisting cable that can be reeled in / released.

[0007] Preferably, the central axis of the helix of the spiral blade is coaxial with the output end of the magnetic transmission coupling.

[0008] Preferably, the magnetic transmission coupling is provided with a magnetized input rotor and a magnetized output rotor inside, the input rotor and the output rotor are magnetically coupled for transmission, a non-ferromagnetic partition is provided between the input rotor and the output rotor, the input rotor is connected to the input end, and the output rotor is connected to the output end.

[0009] Preferably, the cover body is also provided with a temperature sensor and a pressure gauge extending from top to bottom under the cover body.

[0010] Preferably, an electric heating tube is inserted into the bottom of the hydrothermal carbonization tank, and the electric heating tube is attached to the outer wall of the inner tank body. The upper side wall of the hydrothermal carbonization tank is provided with a steam input tube inserted into the inner tank body from the outside to the inside.

[0011] Preferably, the frame includes a base and two columns arranged on the base, a hydrothermal carbonization tank is set between the two columns, one of the columns is a high column, a crossbeam is set on the top of the column, and a lifting device is set on the crossbeam.

[0012] Preferably, both sides of the hydrothermal carbonization tank are mounted between two columns via a rotating shaft, wherein the rotating shaft on one side penetrates the column and is connected to a hand-cranked wheel, and a reducer is provided between the hand-cranked wheel and the corresponding rotating shaft.

[0013] Preferably, the top surface of the inner tank body is an outwardly extending opening, the bottom surface of the cover body is provided with a conical boss corresponding to the opening, and the cover body is fixed to the top surface of the outer tank body by bolts arranged evenly around the outer circumference of the conical boss.

[0014] The present invention adopts a spiral blade without a central axis for stirring, thereby reducing the dead corners of carbonization products adhesion and facilitating the cleaning of carbonization products adhered to the spiral blades; after the spiral blades are raised, a combination of magnetic field oscillation and ultrasonic cleaning is adopted to make the spiral blades and the adhered carbonization products generate vibrations of different frequencies and different mechanisms, thereby achieving the purpose of sufficient separation and cleaning; the present invention can fully clean the agitator adhesion of the hydrothermal carbonization tank, thereby ensuring the accuracy of the test results during test use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2It is a structural schematic diagram of a cover body in a raised state according to the present invention.

[0018] In the figure: 1. base, 2. left column, 3. right column, 4. inner tank body, 5. outer tank body, 6. insulation layer, 7. hydrothermal carbonization tank, 8. cover body, 9. spiral blades, 10. motor, 11. motor seat, 12. pressure gauge, 13. temperature sensor, 14. magnetic transmission coupling, 15. electric heating tube, 16. lifting rod, 17. beam, 18. coil, 19. ultrasonic generator, 20. rotating shaft, 21. reducer, 22. hand wheel, 23. bolts, 24. steam input pipe. DETAILED DESCRIPTION

[0019] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0020] Embodiment: A hydrothermal carbonization device with carbon deposit cleaning, such as Figure 1 , 2 As shown. The frame includes a base 1 and a left column 2 and a right column 3 arranged on the base. A water-heated carbonization tank 7 is set between the two columns. The two sides of the water-heated carbonization tank 7 are set between the two columns through a rotating shaft 20. The rotating shaft on the left side penetrates the left column 2 and is connected to a hand-cranked wheel 22. A reducer 21 is arranged between the hand-cranked wheel and the corresponding rotating shaft. The left column 2 is a high column. A crossbeam 17 is set on the top of the left column 2. A lifting rod 16 for hoisting the cover body is arranged on the crossbeam.

[0021] The hydrothermal carbonization tank 7 is open upward, and includes an inner tank body 4 and an outer tank body 5, with an insulation layer 6 sandwiched between the inner tank body and the outer tank body. An electric heating tube 15 is inserted into the bottom of the hydrothermal carbonization tank, and the electric heating tube 15 is attached to the outer wall of the inner tank body 4. A steam input pipe 24 is provided on the upper side of the hydrothermal carbonization tank and is inserted into the inner tank body from the outside to the inside.

[0022] A cover 8 is buckled on the top of the hydrothermal carbonization tank 7, the top surface of the inner tank body 4 is an outwardly open opening, and the bottom surface of the cover 8 is provided with a conical boss corresponding to the opening. The cover is fixed to the top surface of the outer tank body 5 around the outer periphery of the conical boss with bolts 23 evenly arranged.

[0023] A magnetic transmission coupling 14 is embedded in the center of the cover body, a motor seat 11 is provided above the cover body, a motor 10 connected to the input end of the magnetic transmission coupling is provided on the motor seat, and a stirrer connected to the output end of the magnetic transmission coupling is provided below the cover body. A magnetized input rotor and a magnetized output rotor are provided inside the magnetic transmission coupling, and the input rotor and the output rotor are magnetically coupled and transmitted. A non-ferromagnetic partition is provided between the input rotor and the output rotor, and the input rotor is connected to the input end, and the output rotor is connected to the output end. The stirrer is a spiral blade 9 without a central axis. The top of the motor seat 11 is connected to a lifting rod 16, and the lifting rod drives the cover body 8 to rise and fall. A coil 18 with an alternating current passing through an annular winding is provided around the top of the cover body, and the axis of the coil coincides with the axis of the magnetic transmission coupling, and the inner diameter of the coil is larger than the outer diameter of the cover body 8. A directional ultrasonic generator 19 facing the center point of the coil is provided on the frames above and below the coil.

[0024] The device uses spiral blades without a central axis, and there is no intersection angle between the shaft and the blades. Therefore, even if the carbonized product adheres, there is no dead angle, and it is easy to clean. In addition, the device is provided with a coil around the cover. When the cover is raised, the coil is flush with the spiral blade, and the coil passes a high-frequency alternating current to form an oscillating magnetic field. The spiral blade is in the form of a thin sheet. Since there is no central axis support, a high-frequency changing induced current is generated in the oscillating magnetic field, which causes the spiral blade to heat up and vibrate with a small amplitude and high frequency. On the other hand, the ultrasonic generator has good directional performance and can impact the carbonized product on the surface of the spiral blade for vibration decomposition. The vibration effect generated by the ultrasonic wave and the vibration effect of the magnetic field oscillation have different frequencies, so that the carbonized product and the spiral blade are in different vibration states, making them easier to separate. After running for 30 seconds to 5 minutes according to the amount of carbonized product adhesion, the adhesion of the carbonized product can be reduced, and the subsequent flushing with a water gun can clean the adhered carbonized product.

Claims

1. A hydrothermal carbonization device, comprising a frame, on which is disposed a hydrothermal carbonization tank with an upward opening, the hydrothermal carbonization tank comprising an inner tank body and an outer tank body, an insulation layer being sandwiched between the inner tank body and the outer tank body, characterized in that: A cover body is buckled on the top of the hydrothermal carbonization tank, a magnetic transmission coupling is arranged in the center of the cover body, a motor connected to the input end of the magnetic transmission coupling is arranged above the cover body, a stirrer connected to the output end of the magnetic transmission coupling is arranged below the cover body, the stirrer is a spiral blade without a central axis, and a lifting device for driving the cover body to rise and fall is also arranged on the top of the frame, a coil of annular winding connected to an alternating current is arranged around the top of the cover body, the axis of the coil coincides with the axis of the magnetic transmission coupling, and the inner diameter of the coil is larger than the outer diameter of the cover.

2. A hydrothermal carbonization device according to claim 1, characterized in that: A directional ultrasonic generator facing the center point of the coil is arranged on the frame above and / or below the coil.

3. A hydrothermal carbonization device according to claim 1, characterized in that: The hoisting device is a hydraulic or motor-driven lifting rod, or the hoisting device is a hoisting cable that can be reeled in / released.

4. A hydrothermal carbonization device according to claim 1, 2 or 3, characterized in that: The central axis of the helical line of the helical blade is coaxial with the output end of the magnetic transmission coupling.

5. A hydrothermal carbonization device according to claim 1, 2 or 3, characterized in that: The magnetic transmission coupling is provided with a magnetized input rotor and a magnetized output rotor inside. The input rotor and the output rotor are magnetically coupled for transmission. A non-ferromagnetic partition is provided between the input rotor and the output rotor. The input rotor is connected to the input end, and the output rotor is connected to the output end.

6. A hydrothermal carbonization device according to claim 1, 2 or 3, characterized in that: The cover body is also provided with a temperature sensor and a pressure gauge extending from top to bottom to the bottom of the cover body.

7. A hydrothermal carbonization device according to claim 1, 2 or 3, characterized in that: An electric heating pipe is inserted into the bottom of the water-heated carbonization tank, and the electric heating pipe is attached to the outer wall of the inner tank body. A steam input pipe is inserted into the inner tank body from the outside to the inside on the upper side wall of the water-heated carbonization tank.

8. A hydrothermal carbonization device according to claim 1, 2 or 3, characterized in that: The frame comprises a base and two columns arranged on the base, a water-heated carbonization tank is set between the two columns, one of the columns is a high column, a crossbeam is set on the top of the column, and a hoisting device is set on the crossbeam.

9. A hydrothermal carbonization device according to claim 8, characterized in that: The two sides of the hydrothermal carbonization tank are mounted between two columns through a rotating shaft, wherein the rotating shaft on one side penetrates the column and is connected to a hand-cranked wheel, and a reducer is arranged between the hand-cranked wheel and the corresponding rotating shaft.

10. A hydrothermal carbonization device according to claim 1, 2 or 3, characterized in that: The top surface of the inner tank body is an opening that spreads outwards, and the bottom surface of the cover body is provided with a conical boss corresponding to the opening. The cover body is fixed to the top surface of the outer tank body by bolts arranged evenly around the outer circumference of the conical boss.

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