A pyrolysis gasifier

Abstract

The present application provides a pyrolysis gasification furnace, the pyrolysis gasification furnace of the present application includes a plurality of communication units arranged in layers and communicated in sequence, each communication unit includes oppositely arranged tube side and loop part, and flat tube part communicated between tube side and loop part.And, tube side and loop part are both formed by oppositely arranged laminated buckling, two cavities are defined in tube side, loop part defines a passage, flat tube part includes first flat tube and second flat tube, first flat tube is communicated between one cavity and passage, second flat tube is communicated between the other cavity and passage, refrigerant can flow from one cavity, sequentially through first flat tube and passage, and then flow out through second flat tube to the other cavity.The pyrolysis gasification furnace of the present application can reduce the flat tube spacing, and by arranging compact communication unit, the heat exchange capacity per unit volume can also be increased, and the heat exchange efficiency can be improved, and the heat exchange effect can be improved.

Description

Technical Field

[0001] This invention relates to the field of pyrolysis gasification technology, and in particular to a pyrolysis gasification furnace. Background Technology

[0002] Biomass gasification refers to the process by which biomass undergoes pyrolysis, using the heat generated from partial combustion. The resulting biomass carbon then reacts with oxygen or water vapor to produce some combustible gas. Biomass typically contains 50%–70% volatile matter, giving it extremely high volatile fuel characteristics. Using biomass gasification to convert it into biomass fuel can fully utilize this high volatile content.

[0003] Biomass pyrolysis gasification furnaces separate the pyrolysis and gasification stages with an oxidation zone, producing gases with almost no tar and sulfur, and achieving a gas cooling efficiency of up to 93%. The primary fuels for gasification furnaces are wood chips, straw, or waste plastics with a moisture content as high as 40-70%.

[0004] The existing pyrolysis gasification furnace process is as follows: wet materials are pre-dried in an externally heated steam dryer, and then pyrolyzed at 600℃ in a screw conveyor; the pyrolyzed product enters the third pyrolysis zone, where it undergoes aerobic high-temperature pyrolysis at 1100℃, removing 99% of the tar; the remaining coke is then gasified through a hot coke bed to remove the remaining tar, and finally the gas is discharged from the outlet (temperature reduced to 800℃). The resulting gaseous product is then treated by a heat exchanger and bag filter to remove a small amount of particles and water, and can then be used for power generation.

[0005] In the existing pyrolysis gasification furnace, flameout occurs during the feeding and ash removal process, preventing continuous gas production. The material needs to be preheated and dried before entering the gasification furnace, and the high combustion heating temperature cannot be utilized efficiently, resulting in high energy consumption and hindering cost control. Summary of the Invention

[0006] In view of this, the present invention aims to provide a pyrolysis gasification furnace to improve the problems of gas production failure caused by easy flameout and the inefficient use of heating energy in the prior art, thereby improving the production efficiency of the pyrolysis gasification furnace.

[0007] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0008] A pyrolysis gasification furnace is installed at the output end of the hopper and the conveying bin.

[0009] It includes a furnace body, the furnace body having a cavity for containing the material output from the conveying hopper and carrying out a pyrolysis reaction;

[0010] The upper part of the furnace body is also provided with a pushing mechanism. One end of the pushing mechanism is connected to a flow guiding mechanism. The pushing mechanism can drive the flow guiding mechanism to rotate or remain stationary at a fixed position. The material flows into the lower part of the furnace body through the guidance of the flow guiding mechanism.

[0011] The lower part of the furnace body is provided with a heating section located at the lower end of the flow guiding mechanism. The high temperature of the heating section forms an oxidation-reduction reaction on the material to generate output gas.

[0012] A circulating gas system is provided on the cavity surrounding the heating section and the cavity structure. The circulating gas system is connected to the flow guiding mechanism and causes the output gas to circulate into the flow guiding mechanism and then be discharged from the furnace body.

[0013] Furthermore, a guide channel is provided between the material conveying bin and the flow guiding mechanism, and the guide channel is used to transfer the material in the material conveying bin to the flow guiding mechanism.

[0014] Furthermore, the pushing mechanism includes a clamp, a pull rod connected to the upper end of the clamp, a first fixing rod sleeved on the pull rod, and a first rotating mold fixedly connected to the first fixing rod;

[0015] The pull rod is driven to rotate along the axis of the furnace body.

[0016] Furthermore, the pushing mechanism also includes a mold sleeve sleeved on the first fixed rod and slidable along the axial direction of the first fixed rod, a positioning sleeve sleeved on the first fixed rod and disposed between the mold sleeve and the first rotating mold, and a pressing mechanism partially sleeved on the outer periphery of the mold sleeve.

[0017] The positioning sleeve is fixedly mounted on the mold sleeve.

[0018] Furthermore, the positioning sleeve is constructed as a flared opening that gradually narrows towards the first mold-turning direction, and one end of the pressing mechanism abuts against the inner ring of the flared opening;

[0019] The flow guiding mechanism includes a first flow guiding part, a second flow guiding part, and a third flow guiding part fixedly connected to the pushing mechanism. The first flow guiding part has a protrusion. The positioning sleeve is provided with a positioning groove corresponding to the protrusion at one end near the first rotating mold.

[0020] The flow guiding mechanism rotates to a preset position along with the first rotating mold because the positioning groove engages with the protrusion.

[0021] Furthermore, the pressing mechanism includes a positioning ring fixedly sleeved on the mold sleeve, a rotating push rod pivotally connected at one end to the positioning ring, and a gripper pivotally at the other end of the rotating push rod.

[0022] A fixed platform protruding from the positioning ring is formed on the rotating top rod;

[0023] The positioning ring is driven to slide relative to the mold sleeve;

[0024] The mold includes an extrusion end and a dividing groove;

[0025] The extrusion end is disposed opposite to the fixed platform, and an elastic body is disposed between the two. The elastic body expands or is compressed due to the sliding of the mold sleeve. The dividing groove is a long groove formed on the mold sleeve, and the long groove corresponds to the protrusion position.

[0026] The gripper is disposed within the dividing groove.

[0027] Furthermore, the first flow guide includes a plurality of interconnecting units arranged in layers and connected in sequence, each of the interconnecting units including a pipeline section and a loop section arranged opposite to each other, and a connecting section connecting the pipeline section and the loop section;

[0028] The pipeline section is defined by two cavities, the circuit section defines a channel, and the flat tube section includes a first flat tube and a second flat tube. The first flat tube is connected between one of the cavities and the channel, and the second flat tube is connected between the other cavity and the channel. The material can flow from one of the cavities sequentially through the first flat tube and the channel, and then flow through the second flat tube to the other cavity and out.

[0029] Furthermore, the first flow guide section is provided with a baffle plate that runs through each of the connecting units. The baffle plate is located between the first flat tube and the second flat tube, and a gap for gas to pass through is formed between the baffle plate and the pipeline section.

[0030] A finned unit is sandwiched between two adjacent connected units.

[0031] Furthermore, the fin unit includes a plurality of sub-fins arranged in sequence, the sub-fins being composed of alternating protrusions and recesses, with the protrusions of two adjacent sub-fins partially overlapping.

[0032] The protrusion and the recess are respectively connected to the two adjacent flat tubes, and each forms a flow channel for the output gas to flow through, and the flow channel is connected to the circulating gas system.

[0033] Furthermore, the furnace body is provided with a flow port for external air circulation located between the heating part and the flow guiding mechanism;

[0034] An annular sealing ring is sandwiched between the flow port and the inner wall of the furnace.

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] The pyrolysis gasification furnace of the present invention replaces the traditional stamped flat tube with a stacked interconnecting unit. The flat tube is supported by the interlocking of the relatively stacked plates of the tube side and the circuit section. At the same time, the pyrolysis gasification furnace can also allow the refrigerant to flow from one cavity through the first flat tube and the channel, and then out through another cavity. This arrangement can reduce the spacing between adjacent flat tubes, thereby improving the heat exchange efficiency and heat exchange effect.

[0037] Furthermore, by installing a partition through the connecting unit to separate the first and second flat tubes, this invention prevents water from directly passing through the partition and guides the water flow from the inlet through the space between the flat tube and the fins, and then through the gap between the partition and the tube side to flow into the fins of the other flat tube, thereby improving heat exchange efficiency. The presence of a protruding ring on at least one adjacent tube side and / or loop section facilitates the insertion and connection of the stacked connecting units and provides positioning, further ensuring smooth gas flow in each layer.

[0038] Furthermore, this invention improves the heat transfer performance of the pyrolysis gasifier by incorporating finned units that contact between two adjacent flat tubes, resulting in a more compact structure and increased heat exchange efficiency. Multiple sub-fins, composed of alternating protrusions and recesses, increase the contact area for water flow into the fins. This ensures that the heat exchange area of ​​the pyrolysis gasifier is fully utilized as the water flows through the flow channel, thereby improving the overall heat exchange efficiency and capacity of the pyrolysis gasifier. Attached Figure Description

[0039] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0040] Figure 1 This is a first-view structural schematic diagram of the pyrolysis gasification furnace described in an embodiment of the present invention;

[0041] Figure 2 This is a second-view structural schematic diagram of the pyrolysis gasification furnace described in an embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the pushing mechanism of the pyrolysis gasification furnace according to an embodiment of the present invention;

[0043] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0044] Figure 5 This is a schematic diagram of the installation structure of the first guide section and the pushing mechanism according to an embodiment of the present invention;

[0045] Figure 6 for Figure 3 AA sectional view;

[0046] Figure 7 This is a schematic diagram of the finned structure described in an embodiment of the present invention.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Hopper; 2. Conveying bin; 3. Furnace body; 4. Pushing mechanism; 6. Circulating gas system; 7. Guide groove; 8. Flow port; 9. Heating section; 12. Pull sleeve; 13. Screw;

[0049] 301. Discharge port; 3-2. Pyrolysis zone; 3-3. Oxidation zone; 3-4. Reduction zone;

[0050] 401. Torsion motor; 402. Drive motor;

[0051] 4011, Chuck; 4013, First fixing rod; 4014, First rotating mold; 4015, First central shaft; 4016, Protrusion;

[0052] 4021, mold sleeve; 4022, positioning sleeve; 4024, positioning groove;

[0053] 40211, Extrusion end; 40212, Dividing groove; 40213, Elastomer; 40231, Positioning ring; 40232, Rotating push rod; 40233, Gripper; 40234, Fixed platform;

[0054] 501. First guide section; 502. Second guide section; 503. Third guide section; 504. Baffle plate; 505. Gap;

[0055] 5011. Piping Section; 5012. Circuit Section;

[0056] 5023, Channel; 50131, First Flat Tube; 50132, Second Flat Tube;

[0057] 50111, Entrance; 50112, Exit;

[0058] 5061, fin; 50611, protrusion; 50612, recess;

[0059] 801. Annular sealing ring. Detailed Implementation

[0060] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0061] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "back," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0062] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0063] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0064] This embodiment relates to a pyrolysis gasification furnace, located at the output end of a hopper 1 and a conveying bin 2. It includes a furnace body 3 with a cavity inside for accommodating the material output from the conveying bin 2 and carrying out the pyrolysis reaction. A pushing mechanism 4 is also provided at the upper part of the furnace body. One end of the pushing mechanism 4 is connected to a guiding mechanism. The pushing mechanism 4 can drive the guiding mechanism to rotate or remain stationary at a fixed position, and the material flows into the lower part of the furnace body via the guiding mechanism 5.

[0065] A heating section 9 is provided at the lower end of the flow guiding mechanism in the lower part of the furnace body. The high temperature of the heating section 9 forms an oxidation-reduction reaction of the material to generate output gas. A circulating gas system 6 is provided on the cavity surrounding the heating section 9 and the cavity structure. The circulating gas system 6 is connected to the flow guiding mechanism and allows the output gas to circulate into the flow guiding mechanism and then be discharged out of the furnace body.

[0066] In this embodiment, the pyrolysis gasification furnace is equipped with a pushing mechanism 4 and a guiding mechanism, which allow the material to be conveyed to the middle of the furnace body for pyrolysis reaction. Figure 1 As shown, a pyrolysis zone 3-2 is formed inside the furnace so that the material can be continuously fed into the heating section 9 for oxidation-reduction reaction, forming an oxidation zone 3-3 and a reduction zone 3-4 inside the furnace, thereby avoiding the situation of the heating section 9 going out of flame. Furthermore, due to the installation of the circulating gas system 6, the high-temperature output gas can be connected to the guiding mechanism so that the incoming material is dried by the guiding mechanism, reducing the investment in pre-drying equipment and lowering energy costs.

[0067] Based on the above overall description, this embodiment presents an exemplary structure. In this embodiment, the heating unit 9 is a coke oven located at the center of the furnace body. Other heating facilities may be used in other embodiments, and are not limited here. Furthermore, as... Figure 1 As shown, the hopper in this embodiment is formed into a funnel structure, and a conveying bin 2 is provided at the outlet of the funnel. The conveying bin 2 in this embodiment is driven by a motor, which drives the spiral plastic rod to rotate, thereby conveying the material into the furnace body. The material in this embodiment can be straw, waste plastic, etc., for pyrolysis and gasification to produce gas.

[0068] like Figures 1 to 6 As shown, in this embodiment, a guide trough 7 is provided between the material conveying bin 2 and the guiding mechanism. The guide trough 7 is used to transfer the material in the material conveying bin 2 to the guiding mechanism. In this embodiment, the guide trough 7 is a spiral guide trough, located at the upper part of the furnace body, with one end connected to the outlet of the aforementioned material conveying bin 2 and the other end connected to the guiding mechanism. Affected by the heat of the output gas conveyed upward by the aforementioned circulating gas system 6, this area has a certain amount of heat. The material inlet is located above the guide trough 7. When the material is conveyed through the guide trough 7, it is pre-dried by the evaporation of the hot output gas.

[0069] The pushing mechanism 4 in this embodiment includes a clamp 4011, a pull rod connected to the upper end of the clamp 4011, a first fixing rod 4013 sleeved on the pull rod, and a first rotating mold 4014 fixedly connected to the first fixing rod 4013; the pull rod is driven to rotate along the axis of the furnace body 3.

[0070] In terms of specific structure, such as Figure 3 and Figure 4 As shown, one end of the chuck 4011 facing the first rotating mold 4014 is a cone, and the other end is a cylinder connected to the cone. A central hole for accommodating the first fixing rod 4013 is provided at the axis of the chuck 4011, and slots are evenly distributed around the circumference of the cone to facilitate the chuck 4011 in fixing the first rotating mold 4014. This arrangement also facilitates disassembly.

[0071] Still Figure 3 and Figure 4 As shown, specifically, the pull rod is fixedly welded to the left side of the clamp 4011. The first fixing rod 4013 is constructed as a ring structure sleeved on the outer periphery of the pull rod and the clamp 4011. A conical hole adapted to the outer periphery of the cone is provided at the corresponding position of the clamp 4011. When the pull rod is pulled to the left, the cone at the front end of the clamp 4011 is squeezed by the conical hole, and the groove width is gradually squeezed and reduced, thereby achieving clamping of the first rotating mold 4014.

[0072] like Figure 4As shown, specifically, a first central shaft 4015 is rotatably connected to the center of the first rotating mold 4014. The upper end of the first central shaft 4015 is fixed in the slot of the clamp 4011 to fix the flow guiding mechanism. The first central shaft 4015 is fixed by nuts at the upper and lower ends of the first rotating mold 4014. Alternatively, it can be fixed by setting a shaft stop or a step on the first central shaft 4015. In this embodiment, the first rotating mold 4014 is cylindrical. In this embodiment, a torsion motor 401 drives the first fixing rod 4013 to rotate, thereby causing the first rotating mold 4014 to rotate by a certain angle.

[0073] The pushing mechanism 4 in this embodiment also includes a mold sleeve 4021 sleeved on the first fixed rod 4013 and slidable along the axial direction of the first fixed rod 4013, a positioning sleeve 4022 sleeved on the first fixed rod 4013 and disposed between the mold sleeve 4021 and the first rotating mold 4014, and a pressing mechanism partially sleeved on the outer periphery of the mold sleeve 4021; the positioning sleeve 4022 is fixedly disposed on the mold sleeve 4021.

[0074] The positioning sleeve 4022 is constructed as a flared opening that gradually narrows towards the first rotating mold 4014, and one end of the pressing mechanism abuts against the inner ring of the flared opening; the positioning sleeve 4022 is provided with a positioning groove 4024 corresponding to the protrusion 4016 at the end near the first rotating mold 4014.

[0075] The flow guiding mechanism includes a first flow guiding part 501, a second flow guiding part 502 and a third flow guiding part 503 fixedly connected to the push mechanism 4. The first flow guiding part 501 has a protrusion 4016. The flow guiding mechanism rotates to a preset position with the first mold 4014 due to the engagement between the positioning groove 4024 and the protrusion 4016.

[0076] The pressing mechanism includes a positioning ring 40231 fixedly sleeved on the mold sleeve 4021, a rotating push rod 40232 pivotally connected to the positioning ring 40231 at one end, and a gripper 40233 pivotally connected to the other end of the rotating push rod 40232; a fixed platform 40234 protruding from the positioning ring 40231 is formed on the rotating push rod 40232; the positioning ring 40231 is driven to slide relative to the mold sleeve 4021; the mold sleeve 4021 includes a pressing end 40211 and a dividing groove 40212.

[0077] The extrusion end 40211 is positioned opposite to the fixed platform 40234, and an elastic body 40213 is positioned between them. The elastic body 40213 expands or is compressed due to the sliding of the mold sleeve 4021. The dividing groove 40212 is a long groove formed on the mold sleeve 4021, and the long groove corresponds to the protrusion position. The gripper 40233 is positioned inside the dividing groove 40212.

[0078] like Figure 4 and Figure 5As shown, a pull sleeve 12 is fixedly sleeved on the outer periphery of the extrusion end 40211. The pull sleeve 12 is a ring structure sleeved on the extrusion end 40211. In this embodiment, two screws 13 are threadedly connected to the pull sleeve 12. One of the screws 13 is driven to rotate by a drive motor 402, and the two screws 13 are driven by a chain, thereby realizing the simultaneous rotation of the two screws 13. When the screws 13 are driven to move the extrusion end 40211 towards the first rotating mold 4014, the dividing groove 40212 and the positioning groove 4024 are aligned with the protrusion 4016. The positioning groove 4024 forms a snap-fit ​​with the first guide part 501 and fixes it, thereby fixing the first guide part 501 in the middle of the furnace body 3.

[0079] When the material rotates for a period of time and a break or jam occurs, the drive motor 402 rotates in the opposite direction, causing the positioning groove 4024 to disengage from the protrusion 4016, thereby activating the torsion motor 401. The flow guiding mechanism can rotate inside the furnace body 3 to facilitate the unblocking of the material, thereby effectively reducing the occurrence of flameout in the pyrolysis gasification furnace.

[0080] In this embodiment, the lower end of the first rotating mold 4014 is fixedly connected to the second rotating film below via a central shaft 4015, and the center of the second rotating film has a second central shaft with the same structure as the central shaft 4015. The second flow guide 502 is rotatably connected to the second central shaft. A third flow guide 503 is also provided below the second flow guide 502. Similarly, the center of the third flow guide 503 is provided with a third central shaft, and the third flow guide 503 is rotatably connected to the third central shaft.

[0081] This configuration facilitates the disassembly and installation of each flow guide section, and allows for the addition or reduction of the backflow section according to the properties of the material to be pyrolyzed, thereby improving the pyrolysis efficiency and minimizing energy consumption. Alternatively, all the aforementioned central shafts can be combined into a single central shaft, making the flow guide mechanism a single unit for installation.

[0082] In addition, the lower end of the third central shaft in this embodiment is fixedly connected to the heating part 9. When the guide part rotates, the heating part 9 can also rotate. The heating part 9 in this embodiment has multiple heating ports evenly distributed around the circumference. By rotating the heating part 9, the material heating temperature can be made more uniform.

[0083] The first flow guide section 501 includes a plurality of interconnecting units arranged in layers and connected in sequence. Each interconnecting unit includes a pipeline section 5011 and a loop section 5012 arranged opposite to each other, and a connecting section connecting the pipeline section 5011 and the loop section 5012.

[0084] The pipeline section 5011 is divided into two cavities, the circuit section 5012 is divided into a channel 5023, and the flat tube section includes a first flat tube 50131 and a second flat tube 50132. The first flat tube 50131 is connected between one of its cavities and the channel 5023, and the second flat tube 50132 is connected between the other cavity and the channel 5023. The material can flow from one cavity through the first flat tube 50131 and the channel 5023 in sequence, and then flow through the second flat tube 50132 to the other cavity and then out.

[0085] In terms of specific structure, such as Figure 6 As shown, the connecting unit in this embodiment is a material flow layer, and the aforementioned pipe section 5011, loop section 5012, and flat tube section constitute the material flow layer. In this embodiment, the inlet 50111 of the pipe section 5011 is connected to the aforementioned guide groove 7, and the cavity below the inlet 50111 can communicate with the first flat tube 50131 to receive materials.

[0086] Still Figure 6 As shown, the first flat tube 50131 has a cavity that communicates with the channel 5023. The channel 5023 connects the first flat tube 50131 and the second flat tube 50132. Thus, material can flow into the second flat tube 50132 through the channel 5023.

[0087] Furthermore, the second flat tube 50132 also has a cavity, and the pipe section 5011 has an outlet 50112 that communicates with the cavity inside the second flat tube 50132. The outlet 50112 of the first guide section communicates with the inlet of the second guide section 502. The outlet of the second guide section 502 communicates with the inlet of the third guide section 503. In this embodiment, the structures of the second guide section 502 and the third guide section 503 are the same as those of the first guide section 501.

[0088] In addition, the discharge port 301 of the furnace body 3 in this embodiment is located at the bottom of the furnace body 3 and is funnel-shaped. The above-mentioned material flows out from the discharge port 301 and is collected after pyrolysis.

[0089] In this embodiment, the first guide section 501 has airflow layers on both the upper and lower sides of the material flow layer. These airflow layers are connected to the aforementioned circulating air system 6. Specifically, as shown... Figure 1 and Figure 2 As shown, the circulating gas system 6 in this embodiment includes a circulating gas pump. A connecting pipe 601 is provided on the reduction zone 3-4, which is connected to the airflow layer inlet of the first guide section 501, the second guide section 502, and the third guide section 503.

[0090] This is because the first flow guide section 501 has a baffle 504 that runs through each connecting unit. The baffle 504 is located between the first flat tube 50131 and the second flat tube 50132, and a gap 505 for gas passage is formed between the baffle 504 and the pipeline section 5011. Specifically, as shown in the following structure... Figure 1 As shown, the partition 504 allows the reduced air to be input from the return circuit 5012, and the high-temperature reducing gas is separated into the upper and lower layers of the first flat tube 50131 and the second flat tube 50132 by the partition 504, so as to accelerate the pyrolysis process and improve production efficiency.

[0091] Furthermore, since the material flows through both the first flat tube 50131 and the second flat tube 50132, it can be evenly distributed, and the flowing reducing gas ensures uniform heating of the material in the pyrolysis zone, improving the pyrolysis effect. To prevent material conveying from becoming stuck, the corners of the cavities within the first flat tube 50131 and the second flat tube 50132 can be rounded and chrome-plated. The reducing gas can be transported to the pyrolysis zone, thereby making efficient use of its thermal energy and reducing the energy consumption of the heating unit 9.

[0092] Furthermore, in this embodiment, a finned unit 506 is sandwiched between two adjacent connected units. That is, the finned unit 506 is disposed in the airflow layer. Figure 7 As shown, the fin unit 506 of this embodiment includes a plurality of sub-fins 5061 arranged sequentially. Each sub-fin 5061 is composed of alternating protrusions 50611 and recesses 50612, with the protrusions 50611 of adjacent sub-fins 5061 partially overlapping. The protrusions 50611 and recesses 50612 are respectively connected to two adjacent flat tube sections and each forms a flow channel for the output gas to flow through. This flow channel is connected to the circulating gas system 6. The output gas end of the circulating pump is used for other industrial or domestic gas, which can effectively solve the problem of discontinuity in the gas production process.

[0093] An air inlet 8 for external air circulation is provided on the furnace body between the heating section and the air guiding mechanism. An annular sealing ring 801 is sandwiched between the air inlet 8 and the inner wall of the furnace body.

[0094] This embodiment also relates to the construction method of the above-mentioned pyrolysis gasification furnace, the specific steps of which are as follows:

[0095] Step 1: The material to be pyrolyzed enters the conveying bin 2 through hopper 1;

[0096] Step 2: Start the torsion motor 401 to rotate so that the inlet of the guide mechanism stops at the outlet end of the guide groove 7;

[0097] Step 3: The material is fed into the furnace body 3 through the conveying bin 2 and then conveyed to the inlet of the guiding mechanism along the guide channel 7;

[0098] Step 4: The pushing mechanism 4 is positioned, with the dividing groove 40212 and the positioning groove 4024 aligned with the protrusion 4016. The positioning groove 4024 engages with and fixes the first guide section 501, while the second guide section 502 and the third guide section 503 are simultaneously fixed.

[0099] Step 5: The heating unit 9 heats the gas to the pyrolysis temperature and starts the circulating gas pump. The reducing gas is introduced into the airflow layer inlet of the first guide section 501, the second guide section 502 and the third guide section 503 through the connecting pipe 601. At the same time, the material flows in the connecting unit of the first guide section 501 and then flows into the second guide section 502 and the third guide section 503.

[0100] Step 6: The pyrolysis material is discharged from outlet 301 and processed uniformly, and the pyrolysis gas is recycled.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pyrolysis gasification furnace, located at the output end of a hopper (1) and a conveying bin (2), characterized in that: Includes a furnace body (3), which has a cavity for containing the material output from the conveying bin (2) and carrying out a pyrolysis reaction; The upper part of the furnace body is also provided with a pushing mechanism (4), one end of which is connected to a flow guiding mechanism. The pushing mechanism (4) can drive the flow guiding mechanism to rotate or remain stationary at a fixed position. The material flows into the lower part of the furnace body through the guidance of the flow guiding mechanism. The lower part of the furnace body is provided with a heating section (9) located at the lower end of the flow guiding mechanism. The material is subjected to oxidation-reduction reaction by the high temperature heating of the heating section (9) to generate output gas. A circulating gas system (6) is provided on the cavity of the heating part (9) and the cavity enclosure. The circulating gas system is connected to the flow guiding mechanism and causes the output gas to circulate into the flow guiding mechanism and then be discharged out of the furnace body. The pushing mechanism (4) includes a clamp (4011), a pull rod connected to the upper end of the clamp (4011), a first fixing rod (4013) sleeved on the pull rod, and a first rotating mold (4014) fixedly connected to the first fixing rod (4013). The pull rod is driven to rotate along the axis of the furnace body (3); The pushing mechanism (4) further includes a mold sleeve (4021) sleeved on the first fixed rod (4013) and slidable along the axial direction of the first fixed rod (4013), a positioning sleeve (4022) sleeved on the first fixed rod (4013) and disposed between the mold sleeve (4021) and the first rotating mold (4014), and a pressing mechanism partially sleeved on the outer periphery of the mold sleeve (4021); The positioning sleeve (4022) is fixedly mounted on the mold sleeve (4021); The positioning sleeve (4022) is constructed as a flared opening that gradually narrows towards the first rotating mold (4014), and one end of the pressing mechanism abuts against the inner ring of the flared opening; The flow guiding mechanism includes a first flow guiding part (501), a second flow guiding part (502) and a third flow guiding part (503) fixedly connected to the push mechanism (4), wherein the first flow guiding part (501) has a protrusion (4016). The positioning sleeve (4022) is provided with a positioning groove (4024) that corresponds one-to-one with the protrusion (4016) at the end near the first rotating mold (4014). The flow guiding mechanism rotates to a preset position along with the first rotating mold (4014) due to the engagement between the positioning groove (4024) and the protrusion (4016); The pressing mechanism includes a positioning ring (40231) fixedly sleeved on the mold sleeve (4021), a rotating push rod (40232) pivotally connected to the positioning ring (40231) at one end, and a gripper (40233) pivotally mounted on the other end of the rotating push rod (40232). A fixed platform (40234) protruding from the positioning ring (40231) is formed on the rotating top rod (40232). The positioning ring (40231) is driven to slide relative to the mold sleeve (4021); The mold (4021) includes an extrusion end (40211) and a dividing groove (40212). The extrusion end (40211) is disposed opposite to the fixed platform (40234), and an elastic body (40213) is disposed between them. The elastic body (40213) expands or is compressed due to the sliding of the mold sleeve (4021). The dividing groove (40212) is a long groove formed on the mold sleeve (4021), and the long groove corresponds to the position of the protrusion (4016). The gripper (40233) is disposed within the dividing groove (40212); The first flow guide (501) includes a plurality of interconnecting units arranged in layers and connected in sequence. Each interconnecting unit includes a pipeline section (5011) and a loop section (5012) arranged opposite to each other, and a connecting section connecting the pipeline section (5011) and the loop section (5012). The pipeline section (5011) is divided into two cavities, and the loop section (5012) is divided into a channel (5023). The flat tube section includes a first flat tube (50131) and a second flat tube (50132). The first flat tube (50131) is connected between one of the cavities and the channel (5023), and the second flat tube (50132) is connected between the other cavity and the channel (5023). The material can flow from one of the cavities sequentially through the first flat tube (50131) and the channel (5023), and then flow through the second flat tube (50132) to the other cavity and then out.

2. The pyrolysis gasification furnace according to claim 1, characterized in that: A guide groove (7) is provided between the material conveying bin (2) and the flow guiding mechanism. The guide groove (7) is used to transfer the material in the material conveying bin (2) to the flow guiding mechanism.

3. The pyrolysis gasification furnace according to claim 1, characterized in that: The first flow guide (501) is provided with a partition (504) that runs through each of the connecting units. The partition (504) is located between the first flat tube (50131) and the second flat tube (50132), and a gap (505) for gas to pass through is formed between the partition (504) and the pipeline (5011). A finned unit (506) is sandwiched between two adjacent connected units.

4. A pyrolysis gasification furnace according to claim 3, characterized in that: The fin unit (506) includes a plurality of sub-fins (5061) arranged in sequence. The sub-fins (5061) are composed of alternating protrusions (50611) and recesses (50612), and the protrusions (50611) of two adjacent sub-fins (5061) partially overlap. The protrusion (50611) and the recess (50612) are respectively connected to the two adjacent flat tubes and each forms a flow channel for the output gas to flow through, and the flow channel is connected to the circulating gas system.

5. A pyrolysis gasification furnace according to claim 1, characterized in that: The furnace body is also provided with a flow port (8) for external air to circulate between the heating part and the flow guiding mechanism. An annular sealing ring (801) is sandwiched between the flow port (8) and the inner wall of the furnace body.

Images