An up-and-down dual-suction and internally heated pyrolysis carbonization test device and its test method

Abstract

The present invention discloses an up-and-down dual-suction internal heating pyrolysis carbonization test device and its test method, belonging to the technical field of biomass carbonization. The test device includes a gas supply mechanism, an internal heating carbonization furnace, and a pyrolysis gas treatment and detection mechanism connected in sequence. The internal heating carbonization furnace has an upper air vent and a lower air vent, and can achieve up-draft pyrolysis in which air is introduced from the upper air vent and discharged through the lower air vent, or down-draft pyrolysis in which air is introduced from the lower air vent and discharged through the upper air vent. The up-draft pyrolysis and down-draft pyrolysis can be freely switched. The test method includes ventilating and igniting, continuous pyrolysis, pyrolysis gas treatment and inspection, and pushing out the carbonization products. The present invention can freely switch between up-draft and down-draft internal heating pyrolysis carbonization tests in a set of devices, reduce the R & D test cost, reduce the number of tests, improve the test efficiency, not damage the carbonization layer structure when discharging carbon, have a simple structure, and high test efficiency.

Description

Technical Field

[0001] The present invention relates to an up-and-down dual-suction internal heating pyrolysis carbonization test device and a pyrolysis carbonization test method, belonging to the technical field of biomass carbonization, specifically to the technical field of an up-and-down dual-suction internal heating biomass carbonization test device and its test method. Background Art

[0002] Studying the pyrolysis reaction of biomass and the influence of factors such as temperature, residence time, atmosphere, pressure, and catalyst is of great significance for improving the quality of the produced coke, the gasification and combustion reaction efficiency, and reducing their pollutant emissions. According to different heating methods, pyrolysis carbonization technology can be divided into internal heating and external heating. External heating carbonization technology carbonizes biomass by an external heating device. The process parameters of external heating carbonization technology are easy to control, the cost is low, and the popularity rate is high. However, due to heat transfer on the wall surface, it is impossible to ensure uniform heating of the raw materials, and the heat transfer effect is worse than that of internal heating. Internal heating carbonization technology carbonizes biomass by directly igniting it in an air environment. Internal heating carbonization technology has a higher heat transfer effect, but its process parameters are difficult to control. Currently, there are more studies on external heating in biomass carbonization tests, and the internal heating test platform is blank.

[0003] For example, the Chinese patent with the patent number CN 212741234 U proposes a biomass carbonization test device. This device carbonizes biomass by electrothermal air, can control the carbonization temperature, air supply volume, and carbonization time, can collect bio-oil while obtaining carbonized products, and can continuously carry out carbonization tests. However, this device can only analyze the quality of the carbon produced under the same pyrolysis time in a single test. If you want to study the influence of different pyrolysis carbonization times on the quality of coke, multiple tests need to be carried out, which has a high time cost and low test efficiency. Moreover, this device adopts an external heating pyrolysis carbonization method, and the data obtained is not representative for internal heating pyrolysis equipment.

[0004] For example, the Chinese patent with the patent number CN 210367539 U proposes a carbonization test device. Its structure mainly includes a bracket, a carbonization device, a coke removal platform, and a collection box. The technical problem to be solved by the present invention is to provide a carbonization test device with simple operation and convenient coke removal, which meets the requirements of repeated tests. This device only optimizes coke removal and cannot show the influence of different pyrolysis carbonization times on the quality of coke in one test, and does not have strong continuous operability and low test efficiency. And this test device is also an external heating carbonization test device.

[0005] As for the Chinese patent with the patent number CN 103113904 A, it proposes an experimental device for coal and biomass pyrolysis tests, which consists of a gas supply part, a powder feeder, an upper water-cooled sleeve, a positioner, a corundum tube, a sedimentation furnace body, a temperature control cabinet, a lower water-cooled sleeve, and a material receiver. This invention has the characteristics of accurate control, a wide temperature range, a wide residence time range of pyrolyzed substances, simple operation, and low operating costs. However, the pyrolysis process adopted by this invention is still an external heating type, and continuous carbonization pyrolysis cannot be achieved, resulting in low test efficiency.

[0006] In summary, it can be seen that the existing technology obviously has inconveniences and defects in actual use, so it is necessary to improve it. Summary of the Invention

[0007] The technical problem to be solved by this invention is to provide an up-and-down dual-suction internal heating type pyrolysis carbonization test device to achieve the following purposes for the above deficiencies:

[0008] 1. This test device can freely switch between up-draft and down-draft internal heating pyrolysis carbonization tests in one set of device, facilitating the study of the influence of different internal heating pyrolysis methods on the quality of carbon and reducing the R & D test costs;

[0009] 2. This invention adopts continuous pyrolysis, reduces the number of tests, and improves the test efficiency;

[0010] 3. Using this test device, the carbonization layer structure is not damaged during carbon discharge, facilitating stratified sampling to study the influence of different heat preservation carbonization times on the physical and chemical properties of carbon and expanding the functions of the test device;

[0011] 4. This test device has a simple structure and high test efficiency.

[0012] At the same time, this invention also provides an up-and-down dual-suction internal heating type pyrolysis carbonization test method, which has the advantages of simple operation, high efficiency, reliable test, and high result accuracy.

[0013] To solve the above technical problems, this invention adopts the following technical solution: An up-and-down dual-suction internal heating type pyrolysis carbonization test device, including a gas supply mechanism, an internal heating carbonization furnace, and a pyrolysis gas treatment and detection mechanism connected in sequence;

[0014] The internal heating carbonization furnace has an upper ventilation port and a lower ventilation port, and can achieve up-draft pyrolysis with air passing through the upper ventilation port and discharging through the lower ventilation port, or down-draft pyrolysis with air passing through the lower ventilation port and discharging through the upper ventilation port; The up-draft pyrolysis and down-draft pyrolysis can be freely switched.

[0015] Furthermore, the internal heating carbonization furnace includes a furnace body, and a ventilation pipe that can move up and down is arranged in the inner cavity of the furnace body.

[0016] Further, a carbon discharging mechanism is provided at the bottom of the internal heating carbonization furnace. The carbon discharging mechanism includes a carbon pushing piston, and an ignition port is formed on the carbon pushing piston. The carbon pushing piston moves up and down in the inner cavity of the furnace body.

[0017] Further, a furnace cover is detachably arranged on the top of the furnace body;

[0018] The lower air vent penetrates through the furnace cover and communicates with the inner cavity of the furnace body;

[0019] The upper air vent is arranged at the top of the ventilation pipe.

[0020] Further, the ventilation pipe can slide through the furnace cover; a gas distributing nozzle is arranged at the bottom end of the ventilation pipe;

[0021] An electric push rod is fixed on the furnace cover; the top of the ventilation pipe is connected with the telescopic rod of the electric push rod.

[0022] Further, a piston rod is connected to the carbon pushing piston. The piston rod extends out of the furnace body of the internal heating carbonization furnace. A furnace frame is arranged below the furnace body, and a pulley group mechanism is connected to the lower end of the piston rod;

[0023] The pulley group mechanism includes a movable pulley, a fixed pulley and a steel wire rope wound between the movable pulley and the fixed pulley. The movable pulley is fixed on the piston rod, the fixed pulley is fixed on the furnace frame, one end of the steel wire rope is fixed on the furnace frame, and the other end is fixedly connected with a steel wire winding wheel. The steel wire winding wheel is fixed on the furnace frame, and a rotating handle is arranged on the steel wire winding wheel. The pulley group mechanism drives the piston rod to drive the carbon pushing piston to move upward to push out the carbonized product.

[0024] Further, the air supply mechanism includes an air bottle, the air bottle is communicated with an air supply pipe, and a mass flowmeter is arranged on the air supply pipe. The other end of the air supply pipe is communicated with a pyrolysis gas pipeline through a heat-resistant ventilation pipeline. The heat-resistant ventilation pipeline is communicated with the air vent on the internal heating carbonization furnace through a heat-resistant hose;

[0025] The pyrolysis gas treatment and detection mechanism includes a condensation device, a gas washing device, a gas dryer, a gas component detector and a wet gas flowmeter which are sequentially arranged on the pyrolysis gas pipeline;

[0026] A first heat-resistant hose, a second heat-resistant hose and a third heat-resistant hose are sequentially connected to the heat-resistant ventilation pipeline. The first heat-resistant hose is communicated with the upper air vent, the second heat-resistant hose is communicated with the lower air vent, and the third heat-resistant hose is communicated with the first heat-resistant hose;

[0027] The heat-resistant ventilation pipe is provided with a first valve and a third valve. The first valve is arranged between the second heat-resistant hose and the third heat-resistant hose, and the third valve is arranged between the first heat-resistant hose and the second heat-resistant hose. A second valve is provided on the first heat-resistant hose, and the second valve is arranged between the third heat-resistant hose and the heat-resistant ventilation pipe. A fourth valve is provided on the third heat-resistant hose.

[0028] Further, a material pressing block is arranged in the inner cavity of the furnace body. The material pressing block is slidably sleeved on the ventilation pipe. A contact sensing guide pin is fixed on the material pressing block.

[0029] A contact sensor is fixed on the ventilation pipe. When the contact sensor contacts the contact sensing guide pin, the biomass combustion is completed.

[0030] Further, the furnace body is detachably fixed on the furnace frame. Both between the furnace body and the furnace cover and between the furnace body and the furnace frame are sealed by sealing rings.

[0031] A plurality of temperature sensors are arranged on the furnace body wall. The plurality of temperature sensors are evenly arranged, and the detection heads of the temperature sensors extend to the inner wall of the furnace body.

[0032] An up-and-down dual-suction internal heating pyrolysis carbonization test method is applied to the up-and-down dual-suction internal heating pyrolysis carbonization test device. The test method includes the following steps:

[0033] S1. Ventilate and ignite. Load the biomass raw material into the inner cavity of the furnace body, seal the furnace cover to the furnace body, open the air bottle, ventilate the internal heating carbonization furnace, and ignite through the ignition port.

[0034] S2. Continuously pyrolyze. Start the electric push rod to drive the ventilation pipe to continuously move upward, so that the combustion zone in the furnace body continuously moves upward. As the combustion zone moves upward, a heat preservation carbonization zone is formed below it.

[0035] S3. Pyrolysis gas treatment and inspection. The pyrolysis gas generated in S2 is sequentially passed through a condensation device and a gas washing device for product separation, dried by a gas dryer, and the composition of the pyrolysis gas is detected in real time by a gas component detector. The gas production of the pyrolysis gas is recorded by a wet gas meter.

[0036] S4. Push out the carbonized product. After the carbonization is completed, open the furnace cover, drive the carbon pushing piston to move upward through the pulley group mechanism, and sequentially push out the carbonized product from the upper end of the furnace body.

[0037] After the present invention adopts the above technical solutions, compared with the prior art, it has the following advantages:

[0038] The present invention can realize simulating the continuous carbonization and pyrolysis process, reduce the number of tests, and improve the test efficiency.

[0039] The present invention can realize the switching between up-draft and down-draft internal heating carbonization tests, which is convenient for studying the influence of different internal heating pyrolysis processes on the quality of carbon. One test device can realize the test verification of two internal heating pyrolysis methods, reducing the cost investment and improving the use efficiency of the device.

[0040] The present invention adopts the pyrolysis process of a continuous pyrolysis reactor, reducing the number of tests and improving the test efficiency.

[0041] When the carbon is discharged in the present invention, the carbonization layer structure is not damaged, which is convenient for stratified sampling to study the influence of different heat preservation and carbonization times on the physical and chemical properties of carbon. It is of great significance for the in-depth study of the internal heat carbonization technology of biomass, and expands the functions of the test device, improving the test accuracy.

[0042] The present invention has the advantages of simple structure and convenient operation. It not only expands the functions of the test bench, but also has high test efficiency. Compared with the traditional test device, the test efficiency can be increased by more than 10 times.

[0043] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0044] Figure 1 is the structural schematic diagram of Embodiment 1;

[0045] Figure 2 is the partial structural schematic diagram of Embodiment 1;

[0046] Figure 3 is the structural schematic diagram of the internal heating carbonization furnace;

[0047] Figure 4 is Figure 3 the enlarged view at A in

[0048] Figure 5 is Figure 3 the enlarged view at B in

[0049] In the figure,

[0050] 1 - Air bottle, 2 - Gas supply pipe, 3 - Mass flowmeter, 4 - Container, 5 - Heat - resistant ventilation pipe, 51 - First heat - resistant hose, 52 - Second heat - resistant hose, 53 - Third heat - resistant hose, 54 - First valve, 55 - Second valve, 56 - Third valve, 57 - Fourth valve, 6 - Inner - heating carbonization furnace, 61 - Furnace body, 62 - Ventilation pipe, 63 - Gas - distributing nozzle, 64 - Electric push rod, 65 - Furnace cover, 66 - Sealing ring, 67 - Material briquette, 68 - Contact - type sensing guide pin, 69 - Contact - type sensor, 610 - Carbon - pushing piston, 611 - Ignition port, 612 - Upper ventilation port, 613 - Lower ventilation port, 614 - Piston rod, 615 - Furnace frame, 616 - Movable pulley, 617 - Fixed pulley, 618 - Steel wire rope, 619 - Steel wire winding wheel, 620 - Sealing element, 621 - Clamping buckle, 622 - Temperature sensor, 623 - Explosion - proof valve, 624 - Thermal insulation layer, 7 - Ash collector, 8 - Condensation device, 9 - Condensation medium, 10 - Gas scrubbing device, 11 - Gas dryer, 12 - Gas component detector, 13 - Wet gas meter, 14 - Gas bag, 15 - Pyrolysis gas pipeline. Detailed implementation mode

[0051] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific implementation mode of the present invention will now be described with reference to the accompanying drawings.

[0052] Embodiment 1

[0053] As Figures 1-5 As shown together, the present invention provides an up - and - down dual - suction inner - heating pyrolysis carbonization test device, including a gas supply mechanism, an inner - heating carbonization furnace 6, and a pyrolysis gas treatment and detection mechanism connected in sequence; the gas supply mechanism includes an air bottle 1, the air bottle 1 is connected to one end of a gas supply pipe 2, a mass flowmeter 3 is arranged on the gas supply pipe 2 to detect the intake air volume; the other end of the gas supply pipe 2 is connected to the inner - heating carbonization furnace 6 through a pipeline.

[0054] The inner - heating carbonization furnace 6 includes a furnace body 61, a furnace cover 65, and a carbon discharging mechanism; the furnace body 61 is fixed on a furnace frame 615. The furnace cover 65 is detachably arranged on the top of the furnace body 61.

[0055] A ventilation pipe 62 that can move up and down coaxially is arranged in the inner cavity of the furnace body 61, and the ventilation pipe 62 can slide through the furnace cover 65; a plurality of gas - distributing nozzles 63 are communicated and arranged at the bottom end of the ventilation pipe 62, and the plurality of gas - distributing nozzles 63 are arranged circumferentially. In this embodiment, preferably 3 - 4 gas - distributing nozzles 63 are provided, and the gas - distributing nozzles 63 have an anti - ash structure.

[0056] The top of the ventilation pipe 62 is connected to the telescopic rod of an electric push rod 64 through a connecting member, and the electric push rod 64 is fixed on the furnace cover 65.

[0057] The inner cavity of the furnace body 61 is also provided with a material pressing block 67. The material pressing block 67 is slidably sleeved on the air pipe 62. The material pressing block 67 compacts the material by its own gravity and moves downward as the volume of the material pyrolysis decreases.

[0058] A contact sensing guide pin 68 is fixed on the material pressing block 67; a contact sensor 69 is fixed on the air pipe 62. As the air pipe 62 moves upward and the material pressing block 67 moves downward, when the contact sensor 69 contacts the contact sensing guide pin 68, the biomass combustion is completed.

[0059] The carbon discharging mechanism includes a carbon pushing piston 610. The carbon pushing piston 610 can move up and down in the inner cavity of the furnace body 61. The carbon pushing piston 610 moves upward to push the carbonized product out from the upper end of the furnace body 1.

[0060] An ignition port 611 is formed on the carbon pushing piston 610. An operator can ignite the biomass in the furnace body 61 through the ignition port 611.

[0061] The internal heating carbonization furnace 6 has an upper air vent 612 and a lower air vent 613. The upper air vent 612 is arranged at the top of the air pipe 62. The lower air vent 613 penetrates through the furnace cover 65 and is communicated with the inner cavity of the furnace body 61. When air is introduced from the upper air vent 612 and discharged from the lower air vent 613, the internal heating carbonization furnace 6 is in up-draft pyrolysis; when air is introduced from the lower air vent 613 and discharged from the upper air vent 612, the internal heating carbonization furnace 6 is in down-draft pyrolysis.

[0062] Further, the air outlet end of the air supply pipe 2 is communicated with one end of a heat-resistant ventilation pipe 5. The other end of the heat-resistant ventilation pipe 5 is connected to a pyrolysis gas pipeline 15. Along the gas flow direction, a first heat-resistant hose 51, a second heat-resistant hose 52 and a third heat-resistant hose 53 are sequentially communicated and arranged on the heat-resistant ventilation pipe 5. The first heat-resistant hose 51 is communicated with the upper air vent 612. The second heat-resistant hose 52 is communicated with the lower air vent 613. The third heat-resistant hose 53 is communicated with the first heat-resistant hose 51.

[0063] The heat-resistant ventilation pipe 5 is provided with a first valve 54 and a third valve 56. The first valve 54 is arranged between the second heat-resistant hose 52 and the third heat-resistant hose 53. The third valve 56 is arranged between the first heat-resistant hose 51 and the second heat-resistant hose 52. The first heat-resistant hose 51 is provided with a second valve 55. The second valve 55 is arranged between the third heat-resistant hose 53 and the heat-resistant ventilation pipe 5. A fourth valve 57 is arranged on the third heat-resistant hose 53.

[0064] When the first valve 54 and the second valve 55 are opened and the third valve 56 and the fourth valve 57 are closed, the internal heating carbonization furnace 6 performs up-draft pyrolysis; when the third valve 56 and the fourth valve 57 are opened and the first valve 54 and the second valve 55 are closed, the internal heating carbonization furnace 6 performs down-draft pyrolysis.

[0065] The pyrolysis gas treatment and detection mechanism includes a condensation device 8, a gas scrubbing device 10, a gas dryer 11, and a gas component detector 12 that are sequentially arranged on the pyrolysis gas pipeline 15.

[0066] The pyrolysis gas treatment and detection mechanism further includes an ash collector 7, and the ash collector 7 is arranged at the incoming gas end of the condensation device 8 on the pyrolysis gas pipeline 15.

[0067] The pyrolysis gas treatment and detection mechanism further includes a wet gas meter 13 and a gas bag 14. The wet gas meter 13 and the gas bag 14 are arranged at the outlet end of the gas component detector 12 on the pyrolysis gas pipeline 15; the gas bag 14 is arranged at the end of the pyrolysis gas pipeline 15 and is used to collect the pyrolysis gas after treatment and detection.

[0068] The condensation device 8 is placed in a condensation medium 9, and the condensation medium 9 is placed in a container 4.

[0069] A piston rod 614 is connected to the carbon pushing piston 610. The piston rod 614 extends out of the furnace body 61. The lower end of the piston rod 614 is connected to a pulley block mechanism. The piston rod 614 is driven by the pulley block mechanism to drive the carbon pushing piston 610 to move upward to push out the carbonization product.

[0070] Further, the pulley block mechanism includes a movable pulley 616 fixed to the piston rod 614, a fixed pulley 617 fixed to the furnace frame 615, and a steel wire rope 618 wound between the movable pulley 616 and the fixed pulley 617; one end of the steel wire rope 618 is fixed to the furnace frame 615, and the other end is fixed to a steel wire winding wheel 619; the steel wire winding wheel 619 is fixed to the furnace frame 615; a rotating handle is provided on the steel wire winding wheel 619.

[0071] Further, a seal 620 is used to seal between the furnace body 61 and the piston rod 614; the seal 620 is preferably graphite packing.

[0072] Both between the furnace body 61 and the furnace cover 65 and between the furnace body 61 and the furnace frame 615 are sealed by a sealing ring 66.

[0073] Both between the furnace body 61 and the furnace cover 65 and between the furnace body 61 and the furnace frame 615 are detachably connected by a plurality of snap fasteners 621; the plurality of snap fasteners 621 are evenly spaced along the circumferential direction of the furnace body 61. In this embodiment, the number of the snap fasteners 612 is four.

[0074] Furthermore, a heat-insulating layer 624 is provided inside the furnace wall of the furnace body 61.

[0075] A plurality of temperature sensor groups are arranged axially on the wall of the furnace body 61. The plurality of temperature sensor groups are evenly spaced. Each temperature sensor group includes a plurality of temperature sensors 622. The plurality of temperature sensors 622 are evenly arranged along the circumferential direction of the furnace body 61. The detection heads of the temperature sensors 622 extend to the inner wall of the furnace body 61.

[0076] An explosion-proof valve 623 is provided on the furnace cover 65.

[0077] It should be noted that: the furnace cover 65 can be detached from the furnace body 61 together with the components installed thereon to realize discharging charcoal from the top of the furnace body 61.

[0078] Embodiment 2

[0079] The present invention provides an up-and-down combined suction and internal heating pyrolysis carbonization test method. The test method is applied to the up-and-down combined suction and internal heating pyrolysis carbonization test device described in the embodiment. The test method includes the following steps:

[0080] S1, ventilating and igniting

[0081] Load the biomass raw material into the inner cavity of the internal heating carbonization furnace (i.e., the furnace chamber), seal the furnace cover to the furnace body, open the air bottle, ventilate the internal heating carbonization furnace, ensure the oxygen required for the combustion of the biomass in the internal heating carbonization furnace and the outflow of the pyrolysis gas, and then ignite through the ignition port.

[0082] There are two ventilation methods in this process. One is: control the first valve and the second valve to open, and the third valve and the fourth valve to close to achieve up-draft pyrolysis; the other is: the first valve and the second valve are closed, and the third valve and the fourth valve are opened to achieve down-draft pyrolysis.

[0083] S2, continuous pyrolysis

[0084] Start the electric push rod to drive the ventilation pipe to continuously move upward, so that the combustion zone in the furnace body continuously moves upward. As the combustion zone moves upward, a heat-insulating carbonization zone is formed below it, and the carbonization time of the carbonization products gradually becomes shorter from bottom to top.

[0085] The continuous upward movement mode of the ventilation pipe is divided into continuous upward movement or intermittent upward movement, which is realized by the continuous upward movement or intermittent upward movement of the electric push rod.

[0086] In S2, as the biomass raw material continues to burn, the material compact moves downward under its own weight to compact the biomass raw material.

[0087] As the combustion zone moves upward, the contact sensor fixed on the vent pipe moves upward, while the contact sensing needle fixed on the material briquette moves downward. When the contact sensor contacts the contact sensing needle, the upward movement of the combustion zone stops, and the biomass combustion is completed.

[0088] S3, Pyrolysis gas treatment and inspection

[0089] The pyrolysis gas generated in S2 is separated by passing through a condensation device and a gas scrubber in sequence, dried by a gas dryer, and the composition of the pyrolysis gas is detected in real time by a gas component detector; the gas production of the pyrolysis gas is recorded by a wet gas meter.

[0090] S4, Pushing out the carbonized product

[0091] After carbonization is completed, open the furnace lid, drive the carbon pushing piston upward through the pulley block mechanism, and sequentially push out the carbonized product from the upper end of the furnace body. This carbon discharging method does not damage the structure of the carbonized layer, and sequential carbon discharging facilitates the study of the influence of different heat preservation carbonization times on the carbonization characteristics; it expands the research field and ensures accuracy.

[0092] The above is an example of the best implementation mode of the present invention, and the parts not described in detail are all common general knowledge of those skilled in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present invention is also within the protection scope of the present invention.

Claims

1. An up-and-down dual-suction internal heating pyrolysis carbonization test device, characterized in that: The test device includes a gas supply mechanism, an internal heating carbonization furnace (6), and a pyrolysis gas treatment and detection mechanism that are connected in sequence; The internal heating carbonization furnace (6) has an upper ventilation port (612) and a lower ventilation port (613), and can achieve up-draft pyrolysis in which air enters from the upper ventilation port (612) and exits through the lower ventilation port (613), or down-draft pyrolysis in which air enters from the lower ventilation port (613) and exits through the upper ventilation port (612); The up-draft pyrolysis and down-draft pyrolysis can be freely switched; The internal heating carbonization furnace (6) includes a furnace body (61), and a ventilation pipe (62) that can move up and down is provided in the inner cavity of the furnace body (61); An out-carbon mechanism is provided at the bottom of the internal heating carbonization furnace (6), the out-carbon mechanism includes a carbon-pushing piston (610), and a ignition port (611) is provided on the carbon-pushing piston (610); The carbon-pushing piston (610) moves up and down in the inner cavity of the furnace body (61); A furnace cover (65) is detachably provided at the top of the furnace body (61); The lower ventilation port (613) penetrates through the furnace cover (65) and communicates with the inner cavity of the furnace body (61); The upper ventilation port (612) is provided at the top of the ventilation pipe (62); The ventilation pipe (62) can slide through the furnace cover (65); A gas distribution nozzle (63) is provided at the bottom end of the ventilation pipe (62); An electric push rod (64) is fixed on the furnace cover (65); The top of the ventilation pipe (62) is connected to the telescopic rod of the electric push rod (64); A material pressing block (67) is provided in the inner cavity of the furnace body (61), and the material pressing block (67) is slidably sleeved on the ventilation pipe (62); A contact sensing guide pin (68) is fixed on the material pressing block (67); A contact sensor (69) is fixed on the ventilation pipe (62), and when the contact sensor (69) contacts the contact sensing guide pin (68), the biomass combustion is completed; An explosion-proof valve (623) is provided on the furnace cover (65).

2. The up-and-down dual-suction internal heating pyrolysis carbonization test device according to claim 1, characterized in that: A piston rod (614) is connected to the carbon-pushing piston (610), the piston rod (614) extends outside the furnace body (61) of the internal heating carbonization furnace (6), a furnace frame (615) is provided below the furnace body (61), and the lower end of the piston rod (614) is connected to a pulley group mechanism; The pulley group mechanism includes a movable pulley (616), a fixed pulley (617), and a steel wire rope (618) wound between the movable pulley (616) and the fixed pulley (617). The movable pulley (616) is fixed on the piston rod (614), the fixed pulley (617) is fixed on the furnace frame (615), one end of the steel wire rope (618) is fixed on the furnace frame (615), and the other end is fixedly connected to a steel wire winding wheel (619); The steel wire winding wheel (619) is fixed on the furnace frame (615); A rotating handle is provided on the steel wire winding wheel (619); The pulley group mechanism drives the piston rod (614) to drive the carbon-pushing piston (610) to move upward to push out the carbonized product.

3. The up-and-down dual-suction internal heating pyrolysis carbonization test device according to claim 2, characterized in that: The air supply mechanism includes an air bottle (1), the air bottle (1) is connected to an air supply pipe (2), and a mass flow meter (3) is arranged on the air supply pipe (2); the other end of the air supply pipe (2) is connected to a pyrolysis gas pipeline (15) through a heat-resistant ventilation pipe (5); the heat-resistant ventilation pipe (5) is connected to the ventilation port on the internal heating carbonization furnace (6) through a heat-resistant hose; The pyrolysis gas treatment and detection mechanism includes a condensation device (8), a gas scrubbing device (10), a gas dryer (11), a gas component detector (12), and a wet gas meter (13) arranged in sequence on the pyrolysis gas pipeline (15); A first heat-resistant hose (51), a second heat-resistant hose (52), and a third heat-resistant hose (53) are sequentially connected to the heat-resistant ventilation pipe (5). The first heat-resistant hose (51) is connected to the upper ventilation port (612), the second heat-resistant hose (52) is connected to the lower ventilation port (613), and the third heat-resistant hose (53) is connected to the first heat-resistant hose (51); A first valve (54) and a third valve (56) are arranged on the heat-resistant ventilation pipe (5). The first valve (54) is arranged between the second heat-resistant hose (52) and the third heat-resistant hose (53), and the third valve (56) is arranged between the first heat-resistant hose (51) and the second heat-resistant hose (52); a second valve (55) is arranged on the first heat-resistant hose (51), and the second valve (55) is arranged between the third heat-resistant hose (53) and the heat-resistant ventilation pipe (5); a fourth valve (57) is arranged on the third heat-resistant hose (53).

4. The up-and-down dual-suction internal heating pyrolysis carbonization test device according to claim 3, characterized in that: The furnace body (61) is detachably fixed on the furnace frame (615); seals (66) are provided between the furnace body (61) and the furnace cover (65), and between the furnace body (61) and the furnace frame (615); A plurality of temperature sensors (622) are arranged on the wall of the furnace body (61), and the plurality of temperature sensors (622) are evenly arranged, and the detection heads of the temperature sensors (622) extend to the inner wall of the furnace body (61).

5. An up-and-down dual-suction internal heating pyrolysis carbonization test method, characterized in that: The method is applied to the up-and-down dual-suction internal heating pyrolysis carbonization test device described in any one of claims 3-4. The pyrolysis carbonization test method includes the following steps: S1, ventilate and ignite. Load the biomass raw material into the inner cavity of the furnace body, seal the furnace cover to the furnace body, open the air bottle, ventilate the internal heating carbonization furnace, and ignite through the ignition port; S2, continuous pyrolysis. Start the electric push rod to drive the ventilation pipe to move upward continuously, so that the combustion zone in the furnace body moves upward continuously. As the combustion zone moves upward, a heat preservation and carbonization zone is formed below it; S3, pyrolysis gas treatment and inspection. The pyrolysis gas generated in S2 is separated by products through a condensation device and a gas scrubbing device in sequence, dried by a gas dryer, and the composition of the pyrolysis gas is detected in real time by a gas component detector; the gas production of the pyrolysis gas is recorded by a wet gas meter; S4, push out the carbonized product. After carbonization is completed, open the furnace cover, drive the carbon pushing piston to move upward through the pulley block mechanism, and sequentially push out the carbonized product from the upper end of the furnace body.

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