A biomass continuous pyrolysis carbonization device

Abstract

A biomass continuous pyrolysis carbonization device, including a hopper, a feeding device, a crusher and a pyrolysis chamber, biomass material in the hopper is sent into the crusher by the feeding device, and after being crushed, the biomass material enters the pyrolysis chamber for pyrolysis; the hopper is provided with a preheating partition and a drying device; the bottom of the pyrolysis chamber is provided with a carbon discharge port, and the top is provided with a pyrolysis gas outlet; the carbon discharge port and the pyrolysis gas outlet are both connected to a heat supply circulation system, two heat exchangers are arranged in the heat supply circulation system, one of the heat exchangers is used for cooling high-temperature pyrolysis carbon discharged from the carbon discharge port, and the other heat exchanger is used for cooling high-temperature pyrolysis gas discharged from the pyrolysis gas outlet; the medium in the heat exchangers absorbs heat after cooling heat exchange and enters the preheating partition as a heat source; the medium entering the preheating partition preheats the biomass material and then returns to the heat supply circulation system. The present application can fully utilize the heat energy of pyrolysis, improve the uniformity of material particle heating and the thermal decomposition efficiency, and make the material pyrolysis carbonization more thorough.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of waste treatment, and particularly relates to a biomass continuous pyrolysis carbonization device. BACKGROUND

[0002] Pyrolysis technology is widely used in the fields of domestic waste and biomass resource utilization. Biomass will generate small molecule fuel gas, pyrolysis oil and biochar and other products by thermal decomposition reaction when heated to a high temperature in an oxygen-deficient or oxygen-free atmosphere. Since the pyrolysis is an oxygen-deficient reaction, the secondary pollution to the atmospheric environment is relatively light, and many heavy metals are fixed in the coke. The pyrolysis equipment has a simple structure and low cost.

[0003] The fixed pyrolysis device cannot continuously pyrolyze the materials, and can only work intermittently. The heating process of the device is also relatively complex, and must be continuously heated and cooled. Despite this, the temperature field distribution of the biomass in the pyrolysis device is extremely uneven, which affects the quality of the products.

[0004] The biomass particles in the pyrolysis device are unevenly heated, and the internal temperature field is also difficult to adjust, which reduces the efficiency of biomass pyrolysis. The residence time of the materials in the reactor is difficult to control, which reduces the carbon yield of the biomass. The vertical flow moving bed reactor is easy to manufacture, and its movement in the reactor completely utilizes its own gravity to fall, without the need for other power sources, and has a low operating cost. However, the reactor has the problem of incomplete carbonization caused by uneven heating of the biomass particles during operation, and improper temperature control can also cause coking, which causes the equipment to be unable to operate, and the quality of the biochar is also difficult to guarantee. SUMMARY

[0005] The purpose of the present application is to provide a biomass continuous pyrolysis carbonization device to solve the problems raised in the background.

[0006] In order to achieve the above object, the technical scheme adopted by the present application is: a biomass continuous pyrolysis carbonization device, comprising a hopper, a feeding device, a crusher and a pyrolysis chamber, the feeding device is used for feeding the biomass material in the hopper into the crusher, and the biomass material is crushed by the crusher and then fed into the pyrolysis chamber for pyrolysis; the hopper is provided with a preheating partition and a drying device, the preheating partition is used for preheating the biomass material in the hopper, and the drying device is used for absorbing water vapor generated by heating of the biomass material; the bottom of the pyrolysis chamber is provided with a carbon discharge port, and the top is provided with a pyrolysis gas outlet, the carbon discharge port and the pyrolysis gas outlet are both connected to a heat supply circulation system, two heat exchangers are arranged in the heat supply circulation system, one of the heat exchangers is used for cooling high-temperature pyrolysis carbon discharged from the carbon discharge port, and the other heat exchanger is used for cooling high-temperature pyrolysis gas discharged from the pyrolysis gas outlet, the medium in the heat exchanger absorbs heat after cooling and heat exchange, and then enters the preheating partition as a heat source, and the medium entering the preheating partition preheats the biomass material and then returns to the heat supply circulation system.

[0007] The heat supply circulation system comprises a cold water tank and a hot water tank, the water inlet of the cold water tank is connected to the hot water outlet of the preheating partition through a valve, and the water outlet of the cold water tank is connected to the medium inlets of the two heat exchangers through pipelines and valves; the water inlet of the hot water tank is connected to the medium outlets of the two heat exchangers through pipelines and valves, and the water outlet of the hot water tank is connected to the hot water inlet of the preheating partition through a valve.

[0008] The heat supply circulation system further comprises a gas washing device, which is used for further cooling and impurity removal of the low-temperature pyrolysis gas after cooling.

[0009] The gas washing device is provided with a spray head and a filter layer, the spray head and the water outlet of the cold water tank are connected through pipelines, valves and a pump, and the position of the spray head is higher than that of the gas inlet of the gas washing device, the gas inlet is used for introducing the low-temperature pyrolysis gas cooled by the heat exchanger; the filter layer is arranged above the spray head; and the gas washing device is provided with a gas washing outlet at the top.

[0010] A safety gas valve is arranged on the pipeline of the gas inlet side of the heat exchanger for heat exchange and cooling of the high-temperature pyrolysis gas.

[0011] A temperature measuring probe is arranged on the pipeline of the gas outlet side of the heat exchanger for heat exchange and cooling of the high-temperature pyrolysis gas.

[0012] An oil storage tank and an air blower for providing low-temperature pyrolysis gas to the gas washing device are connected to the pipeline of the gas outlet side of the heat exchanger for heat exchange and cooling of the high-temperature pyrolysis gas.

[0013] A carbon collecting tank is connected to the outlet side of the heat exchanger for heat exchange and cooling of the high-temperature pyrolysis carbon.

[0014] The side wall of the pyrolysis chamber is provided with electric heating tiles, the lower part of the pyrolysis chamber is connected with a protective gas tank, the protective gas enters the pyrolysis chamber to push the high-temperature gas to flow upwards, so that the biomass powder particles are in a fluidized state, and an anchor stirring paddle is arranged in the pyrolysis chamber.

[0015] The electric heating tile is composed of alternating heat-insulating asbestos and electric heating wires, and the biomass powder is radiantly heated by the electric heating wires.

[0016] The preheating layer is arranged at the hopper, the material is preheated by hot water generated by heat exchange between high-temperature pyrolysis gas and high-temperature pyrolysis carbon, the initial temperature of the material can be increased, the material can be uniformly heated, the thermal decomposition efficiency can be improved, energy recycling can be realized, the development goal of energy saving and emission reduction can be met, and the material can be dried after preheating, the material can be crushed more finely in the crushing process, the material can be heated and pyrolyzed more fully in the pyrolysis chamber, and the material can be heated more uniformly and pyrolyzed more completely.

[0017] The heat supply circulating system is designed in the form of small-power control pipe combination, so that the manufacturing cost is greatly reduced, the service life and stability are improved, the system has multiple working modes, the heat source provided for the preheating layer can be selected according to actual conditions, heat energy can be more fully utilized, and the application range of the application is also expanded.

[0018] The protective gas is introduced into the pyrolysis chamber from the bottom, the high-temperature gas is pushed to flow upwards, the material particles are in a fluidized state, the heating uniformity and carbonization efficiency are improved, the problems of low efficiency and environmental pollution in traditional combustion pyrolysis of biomass are solved, the controllability in the production process and product quality are improved by adopting the anchor stirring design.

[0019] The heat exchanger flow can be adjusted according to the temperature, and the problem of tar blockage of the condensing pipeline can be solved.

[0020] The system has compact structure, high biomass treatment capacity, large treatment capacity, high thermal efficiency, and high-quality biochar can be easily obtained. DETAILED DESCRIPTION OF DRAWINGS

[0021] Figure 1 A mobile biomass continuous pyrolysis carbonization device provided by the application is shown in the figure;

[0022] Figure 2 A pyrolysis chamber cross-sectional view provided by the application is shown in the figure;

[0023] Figure 3 A heating tile structure cross-sectional view provided by the application is shown in the figure;

[0024] Figure 4A top view of the heating tile structure provided by the present application;

[0025] Marked in the figure: 1, hopper, 2, hopper inlet, 3, drying device, 4, preheating partition, 5, heat preservation layer, 6, hot water inlet, 7, hot water outlet, 8, spiral feeding device, 9, spiral pushing wheel, 10, crusher, 11, feeding valve, 12, pyrolysis chamber, 13, electric heating tile, 131, heat insulation asbestos, 132, electric heating wire, 14, anchor stirring paddle, 15, protective gas tank, 16, pump one, 17, first temperature measuring probe, 18, first heat exchanger, 19, carbon collection tank, 20, cold water tank, 21, hot water tank, 22, first valve, 23, second valve, 24, third valve, 25, fourth valve, 26, fifth valve, 27, sixth valve, 28, seventh valve, 29, eighth valve, 30, pump two, 31, safety valve, 32, second heat exchanger, 33, second temperature measuring probe, 34, oil storage tank, 35, induced draft fan, 36, gas washing device, 37, spray head, 38, filter cotton, 39, gas washing outlet. DETAILED DESCRIPTION

[0026] The present application will be further described in detail below in combination with the accompanying drawings and examples, but not as any basis for limiting the application.

[0027] Example 1: The biomass continuous pyrolysis carbonization device provided by the present application comprises a hopper 1, a feeding device, a crusher 10, a pyrolysis device and a heat supply circulation system.

[0028] The hopper 1 is provided with a hopper inlet 2 at the top for feeding the material to be treated, and is provided with a hopper outlet at the bottom connected with the inlet of the feeding device, the outlet of the feeding device is connected with the crusher 10, and the material in the hopper 1 enters the crusher 10 after being crushed, and then enters the pyrolysis device for pyrolysis.

[0029] In order to improve the crushing effect of the material and improve the uniformity of the crushed material in the pyrolysis device and the degree of pyrolysis, a preheating partition 4 and a drying device 3 are arranged on the side wall of the hopper 1, the preheating partition 4 is arranged around the side wall of the hopper, and the drying device 3 is arranged on the inner wall of the hopper, the moisture of the biomass material in the hopper 1 is evaporated under the heating action of the preheating partition 4, and the evaporated water vapor is dried by calcium oxide in the drying device 3, and the temperature of the preheating partition 4 is 80-200℃.

[0030] The preheating partition 4 is preferably preheated by hot water, and the hot water inlet 6 and the hot water outlet 7 are arranged on the upper part and the lower part of the preheating partition 4 respectively, and the hot water inlet 6 and the hot water outlet 7 are connected with the heat supply circulation system, and the hot water in the heat supply circulation system is used.

[0031] The feeding device adopts a screw feeding device 8 which is composed of a sleeve and a screw pushing wheel 9, the lowest end of the sleeve is the inlet and the highest end is the outlet, the biomass material after being fully preheated and dried enters the screw feeding device 8 from the hopper 1, and the screw pushing wheel 9 pushes the biomass material into the crusher 10 after being uniformly mixed.

[0032] The outlet of the crusher is connected with a pyrolysis chamber 12 through a feeding pipeline, the feeding pipeline is provided with a feeding valve 11, and the pyrolysis chamber 12 is the pyrolysis device. The pyrolysis chamber 12 is a vertical cylindrical structure, the top of the pyrolysis chamber 12 is connected with the end of the feeding pipeline, one side of the feeding pipeline is provided with an opening as a pyrolysis gas outlet, and the bottom of the pyrolysis chamber 12 is provided with a carbon discharge port, and the pyrolysis gas outlet and the carbon discharge port are connected with the heat supply circulation system.

[0033] The outer wall of the pyrolysis chamber 12 is made of iron, and the inner wall is provided with electric heating tiles 13, the electric heating tiles 13 are composed of alternating heat insulation asbestos 131 and electric heating wires 132, the annular cross-sectional area of the electric heating tiles 13 is 15% of the cross-sectional area of the hearth of the pyrolysis chamber 12, and the electric heating wires 132 radiate and heat the biomass powder. As shown in Figure 3 、 4 illustrated, the electric heating tiles 13 are filled with the heat insulation asbestos 131 with a thickness of 50 mm, the heat insulation asbestos 131 is provided with a plurality of grooves in an annular equidistant manner, the electric heating wires 132 are arranged in the grooves, and the electric heating wires 132 are externally sleeved with vacuum glass to ensure the working safety of the pyrolysis chamber. The lower part of the pyrolysis chamber 12 is connected with a protective gas tank 15, nitrogen is introduced into the pyrolysis chamber 12 under the driving of a pump 16, pushes the high-temperature gas to flow upwards, makes the biomass powder particles present in a fluidized state, and improves the heating uniformity and carbonization efficiency of the biomass powder. The pyrolysis chamber 12 is provided with an anchor stirring paddle 14 in the center, the anchor stirring paddle 14 is continuously and slowly stirred in the pyrolysis reaction, and the heating uniformity of the biomass powder in the pyrolysis chamber 12 is ensured; the pyrolysis chamber 12 is provided with a first temperature measuring probe 17, the pyrolysis temperature is monitored in real time, the pyrolysis temperature is changed by adjusting the power of the electric heating tiles 13, and the proportion of the pyrolysis product is controlled. When the pyrolysis temperature reaches 400 DEG C, with the increase of the pyrolysis temperature, the yield of the gaseous product gradually increases, the yield of the solid coke rapidly decreases, the pyrolysis carbon reaches the maximum value at 400 DEG C, and the pyrolysis oil reaches the maximum value at 500 DEG C to 550 DEG C.

[0034] The heat supply circulation system includes two sets of heat exchangers, a cold water tank, a hot water tank and necessary pipelines and valves, the pyrolysis gas and the high-temperature pyrolysis carbon generated in the pyrolysis chamber are respectively exchanged with cold water in the heat exchangers, the heated hot water is introduced into the preheating layer to heat the material in the hopper, the low-temperature pyrolysis carbon after heat exchange is introduced into a carbon collecting tank 19 for collection, the pyrolysis oil after heat exchange is condensed in a condensing pipeline, the low-temperature pyrolysis gas is introduced into a gas washing device 36 through an induced draft fan, and then flows out from a gas washing outlet.

[0035] The above is the general function of the heat supply circulating system, and the heat supply circulating system is arranged as follows to realize the above functions.

[0036] The first set of heat exchanger is used for heat exchange and cooling of high-temperature pyrolysis carbon, and the heat exchanger is the first heat exchanger 18 in the first set of heat exchanger 18. Figure 1 The first channel of the first heat exchanger 18 is connected with the carbon discharge port at the bottom of the pyrolysis chamber 12 at one end and connected with the carbon collection box 19 at the other end, the inlet of the second channel of the first heat exchanger is connected with the water outlet of the cold water tank 20 through the eighth valve 29, and the outlet of the second channel is connected with the water inlet of the hot water tank 21 through the second valve 23.

[0037] The second set of heat exchanger is used for heat exchange and cooling of high-temperature pyrolysis gas, and the heat exchanger is the second heat exchanger 32 in the second set of heat exchanger 32. Figure 1 The first channel of the second heat exchanger 32 is connected with the feed pipe at the top of the pyrolysis chamber 12 at one end and connected with the gas inlet of the gas washing device 36 through the induced draft fan 35, and the oil tank 34 is arranged on the pipeline between the induced draft fan 35 and the second heat exchanger 32; the inlet of the second channel of the second heat exchanger 32 is connected with the water outlet of the cold water tank 20 through the seventh valve 28, and the outlet of the second channel is connected with the water inlet of the hot water tank 21 through the third valve 24.

[0038] The water inlet of the cold water tank 20 is connected with the hot water outlet 7 on the preheating layer 4 through the pipeline and the first valve 22, and the water outlet of the hot water tank 21 is connected with the hot water inlet 6 on the preheating layer 4 through the pipeline and the fifth valve 26.

[0039] The water outlet of the cold water tank 20 is also connected with the spray head 37 in the gas washing device 36 through the sixth valve 27, the pump 30 and the pipeline, the position of the spray head 37 is higher than that of the gas inlet of the gas washing device 36, the pyrolysis gas entering the gas washing device 36 is fully heat-exchanged through spraying, a filter cotton 38 is arranged above the spray head 37 to filter the pollutants in the pyrolysis gas, and the filtered gas flows out from the gas washing outlet 39 at the top of the gas washing device 36; a water discharge port is arranged at the bottom of the gas washing device 36, and the water discharge port is connected with the water inlet of the hot water tank 21 through the fourth valve 25 and the pipeline.

[0040] Further, a safety valve 31 is arranged in the upstream direction of the second heat exchanger 32, and a second temperature probe 33 is arranged in the downstream direction. The temperature feedback of the second temperature probe 33 is used to adjust the flow of the cold source of the second heat exchanger 32 to prevent the temperature of the pyrolysis gas from being too low due to excessive heat exchange between the pyrolysis gas and the second heat exchanger 32, and the pyrolysis oil is condensed and collected in the oil tank 34 at the pipeline, the inlet and outlet of the oil tank 34 are arranged in the middle part of the tank body, and the problem of tar blocking the condensing pipeline is solved.

[0041] The valve control system reads the temperature detection signal to select and control the opening and closing of different valves, so as to provide multiple modes of heat medium to meet the preheating temperature adjustment of the hopper.

[0042] Mode I: the first valve 22, the third valve 24, the fifth valve 26 and the seventh valve 28 are opened, and the remaining valves are closed. The high-temperature pyrolysis gas is fully exchanged with the cold source water in the second heat exchanger 32 (the cold source water is provided by the cold water tank 20 through the opening of the seventh valve 28), and the heat source water after heat exchange (the heat source water is provided by the second heat exchanger 32 through the opening of the third valve 24 into the hot water tank 21) is supplied to the preheating layer 4 through the fifth valve 26. The low-temperature pyrolysis gas cooled by the second heat exchanger 32 has a temperature of about 60°C, and the pyrolysis oil carried in the original high-temperature pyrolysis gas changes from gas to liquid and flows into the oil storage tank 34 under the push of the low-temperature pyrolysis gas, and the low-temperature pyrolysis gas flows into the gas washing device 36.

[0043] Mode II: the first valve 22, the second valve 23, the fifth valve 26 and the eighth valve 29 are opened, and the remaining valves are closed. The high-temperature pyrolysis carbon is fully exchanged with the cold source water in the first heat exchanger 18 (the cold source water is provided by the cold water tank 20 through the opening of the eighth valve 29), and the heat source water after heat exchange enters the hot water tank through the third valve 23 and is supplied to the preheating layer 4 through the fifth valve 26. After being cooled by the first heat exchanger 18, the high-temperature pyrolysis carbon becomes low-temperature pyrolysis carbon with a temperature of about 60°C, and the low-temperature pyrolysis carbon is collected in the carbon collection tank 19.

[0044] Mode III: the first valve 22, the fourth valve 25, the fifth valve 26 and the sixth valve 27 are opened, and the remaining valves are closed. The spray head 37 in the gas washing device 36 sprays the cold source water (the cold source water is provided by the cold water tank 20 through the opening of the sixth valve 27 and by the pump 2 30) from top to bottom, and the cold source water absorbs the waste heat of the low-temperature pyrolysis gas and then enters the hot water tank 21 through the fourth valve 25 to supply heat source to the preheating layer 4.

[0045] Mode IV: the first valve 22, the second valve 23, the third valve 24, the fifth valve 26, the seventh valve 28 and the eighth valve 29 are opened, and the remaining valves are closed. The high-temperature pyrolysis gas is fully exchanged with the cold source water in the second heat exchanger 32, and the heat source water after heat exchange enters the hot water tank 21 through the third valve 24. The high-temperature pyrolysis carbon is fully exchanged with the cold source water in the first heat exchanger 18 (the cold source water is provided by the cold water tank 20 through the opening of the eighth valve 29), and the heat source water after heat exchange enters the hot water tank 21 through the third valve 23. At this time, the hot water produced by the two heat exchangers is supplied to the preheating layer 4 through the fifth valve 26.

[0046] Mode V: open the first valve 22, the third valve 24, the fourth valve 25, the fifth valve 26, the sixth valve 27 and the seventh valve 28, the rest of the valve is closed, high temperature pyrolysis gas and the cold source water in the second heat exchanger 32 are fully heat exchanged, the heat source water after heat exchange enters the hot water tank 21 through the third valve 24, the spray head 37 in the gas washing device 36 sprays the cold source water (the cold source water is provided by the cold water tank 20 opening the sixth valve 27) from top to bottom, the cold source water absorbs the low temperature pyrolysis gas waste heat and then enters the hot water tank 21 through the fourth valve 25, at this time, the heat source water produced in the second heat exchanger 32 and the gas washing device is supplied to the preheating layer 4 through the fifth valve 26.

[0047] Mode VI: open the first valve 22, the second valve 23, the fourth valve 25, the fifth valve 26, the sixth valve 27 and the eighth valve 29, the rest of the valve is closed, high temperature pyrolysis carbon and the cold source water (the cold source water is provided by the cold water tank 20 opening the eighth valve 29) in the first heat exchanger 18 are fully heat exchanged, the heat source water after heat exchange enters the hot water tank 21 through the third valve 23, the spray head 37 in the gas washing device 36 sprays the cold source water (the cold source water is provided by the cold water tank 20 opening the sixth valve 27) from top to bottom, the cold source water absorbs the low temperature pyrolysis gas waste heat and then enters the hot water tank 21 through the fourth valve 25, at this time, the heat source water produced in the first heat exchanger 18 and the gas washing device 36 is supplied to the preheating layer 4 through the fifth valve 26.

[0048] When the present application is used, it can be placed on a trailer traveling mechanism composed of a frame, a traction mechanism and a support leg, the present application is installed on the trailer traveling mechanism, and a power source such as a tractor can be used to conveniently tow it to a forest field or a rural area where biomass resources are relatively concentrated to carry out fast pyrolysis liquefaction production, realize mobile chemical plant operation, save raw material collection and transportation cost, and reduce production cost.

[0049] The above examples are only used to illustrate the technical solutions of the present application but not to limit it, and those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced by equivalents according to the above examples, and any modification or equivalent replacement without departing from the spirit and scope of the present application is within the protection scope of the claims.

Claims

1. A biomass continuous pyrolysis and carbonization device, comprising a hopper, a feeding device, a crusher, and a pyrolysis chamber. The feeding device is used to feed the biomass material in the hopper into the crusher, which crushes the biomass material and then feeds it into the pyrolysis chamber for pyrolysis. The device is characterized by: The hopper is provided with a preheating insulation layer and a drying device, the preheating insulation layer is used to preheat the biomass material in the hopper, and the drying device is used to absorb water vapor generated by the heating of the biomass material; the pyrolysis chamber is provided with a charcoal discharge port at the bottom and a pyrolysis gas outlet at the top, both of which are connected to a heat supply circulation system, and the heat supply circulation system is provided with a first heat exchanger and a second heat exchanger, wherein the first heat exchanger is used to cool the high-temperature pyrolysis char discharged from the charcoal discharge port, and the second heat exchanger is used to cool the high-temperature pyrolysis gas discharged from the pyrolysis gas outlet, and the medium in the first heat exchanger and the second heat exchanger absorbs heat after heat exchange and enters the preheating insulation layer as a heat source, and the medium entering the preheating insulation layer preheats the biomass material and then returns to the heat supply circulation system, and the medium is water; The heating circulation system includes a cold water tank and a hot water tank. The water inlet of the cold water tank is connected to the hot water outlet of the preheating insulation through a valve, and the water outlet of the cold water tank is connected to the medium inlets of the two heat exchangers through pipelines and valves respectively; the water inlet of the hot water tank is connected to the medium outlets of the two heat exchangers through pipelines and valves respectively, and the water outlet of the hot water tank is connected to the hot water inlet of the preheating insulation through a valve; the heating circulation system also includes a gas scrubber, which is used to cool and remove impurities from the cooled low-temperature pyrolysis gas; The scrubber is provided with a spray head and a filter layer. The spray head and the water outlet of the cold water tank are connected through a pipeline, a valve and a pump. The spray head is positioned higher than the air inlet of the scrubber, and the air inlet is used to introduce low-temperature pyrolysis gas cooled by the heat exchanger. The filter layer is arranged above the spray head. A scrubber outlet is provided at the top of the scrubber. One end of the first channel of the first heat exchanger is connected to the carbon discharge port at the bottom of the pyrolysis chamber, and the other end is connected to the carbon collection box. The inlet of the second channel of the first heat exchanger is connected to the water outlet of the cold water tank through the eighth valve, and the outlet of the second channel is connected to the water inlet of the hot water tank through the second valve. One end of the first channel of the second heat exchanger is connected to the side of the feed pipe at the top of the pyrolysis chamber, and the other end is connected to the air inlet of the scrubber through an induced draft fan. An oil storage tank is arranged on the pipeline between the induced draft fan and the second heat exchanger; the inlet of the second channel of the second heat exchanger is connected to the water outlet of the cold water tank through a seventh valve, and the outlet of the second channel is connected to the water inlet of the hot water tank through a third valve.

2. The biomass continuous pyrolysis and carbonization device according to claim 1, characterized in that: A safety gas valve is provided on the pipeline on the gas inlet side of the second heat exchanger.

3. The biomass continuous pyrolysis and carbonization device according to claim 2, characterized in that: A temperature measuring probe is provided on the pipeline on the gas outlet side of the second heat exchanger.

4. The biomass continuous pyrolysis and carbonization device according to claim 1, characterized in that: An oil storage tank and an induced draft fan for providing low-temperature pyrolysis gas to the scrubber are connected to the pipeline on the gas outlet side of the second heat exchanger.

5. The biomass continuous pyrolysis and carbonization device according to claim 1, characterized in that: The outlet side of the first heat exchanger is connected to a carbon collecting box.

6. The biomass continuous pyrolysis and carbonization device according to claim 1, characterized in that: The side walls of the pyrolysis chamber are provided with electric heating tiles, and the lower part of the pyrolysis chamber is connected to the protective gas tank. The protective gas enters the pyrolysis chamber and pushes the high-temperature gas to flow upward, so that the biomass powder particles are fluidized. An anchor-type stirring paddle is provided in the pyrolysis chamber; a temperature probe is also installed on the side wall of the pyrolysis chamber to monitor the pyrolysis temperature.

7. The biomass continuous pyrolysis and carbonization device according to claim 6, characterized in that: The electric heating tile is composed of insulating asbestos and electric heating wires, and the electric heating wires are used to radiate heat to the biomass powder.

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