Agricultural film pyrolyzing furnace

Abstract

The utility model discloses an agricultural film pyrolyzing furnace, which belongs to the technical field of agricultural film recycling treatment and comprises a pyrolyzing chamber and a condensing device. The rotary drum is arranged in the pyrolysis box, and the heating area is arranged between the rotary drum and the pyrolysis box, so that materials input into the rotary drum are heated and pyrolyzed, dynamic heating of the materials is achieved through rotation of the rotary drum, and the coking phenomenon in the material pyrolysis process is reduced; a gas phase outlet of the rotary drum is communicated with a condensing device, so that condensable gas phase products are condensed, recycled and stored, and non-condensable gas phase products are output; a solid-phase outlet is formed in the rotary drum, so that a solid-phase product after pyrolysis is output. The agricultural film pyrolyzing furnace disclosed by the utility model is reasonable in structural arrangement, can realize efficient pyrolysis, improve the pyrolysis efficiency, realize energy closed loop and reduce the consumption of external energy, and has better application prospect and popularization value.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural film recycling and processing technology, specifically relating to an agricultural film pyrolysis furnace. Background Technology

[0002] my country is a major agricultural country, with annual agricultural film usage exceeding one million tons and a residue rate as high as 40%, resulting in serious "white pollution." Traditional treatment technologies generally include landfill and incineration. Landfilling easily leads to soil compaction, while incineration produces pollutants such as dioxins. Furthermore, conventional pyrolysis technology suffers from low heat transfer efficiency, severe coking, high energy consumption, and low added value of products, making it difficult to meet the green treatment requirements under the "dual carbon" target. Utility Model Content

[0003] In view of one or more of the above-mentioned defects or improvement needs of the prior art, this utility model provides an agricultural film pyrolysis furnace, which can realize efficient and uniform heat transfer, energy closed loop and full resource utilization of products in the pyrolysis process.

[0004] To achieve the above objectives, this utility model provides an agricultural film pyrolysis furnace, which includes a pyrolysis chamber and a condensation device;

[0005] The pyrolysis chamber includes a pyrolysis box and a rotating drum; the rotating drum is disposed inside the pyrolysis box and can rotate relative to the pyrolysis box under the drive of a rotation drive device; a heating zone is provided between the pyrolysis box and the rotating drum to heat the rotating drum;

[0006] One end of the rotating drum is provided with a feed inlet for inputting materials; the other end of the rotating drum is provided with a solid phase outlet and a gas phase outlet. The solid phase outlet is used to output the solid phase products after material pyrolysis, and the gas phase outlet is used to output the gas phase products after material pyrolysis.

[0007] The condensation device is provided with a first air inlet at one end and a first air outlet at the other end. The first air inlet is connected to the gas phase outlet to condense condensable gas phase products into liquid for storage, and to output non-condensable gas phase products through the first air outlet.

[0008] As a further improvement of this utility model, multiple sets of blade assemblies are arranged circumferentially on the inner wall of the rotating drum, and multiple blades are arranged axially in each set of blade assemblies to chop and stir the material.

[0009] And / or,

[0010] The inner wall of the pyrolysis chamber is provided with baffles spaced axially, and the baffles are staggered circumferentially to form a baffle-type flue in the heating zone.

[0011] As a further improvement of this utility model, it also includes a combustion chamber, on which a second air outlet is provided; the second air outlet is connected to the heating zone through a high-temperature flue, so as to transport the high-temperature flue gas generated by combustion in the combustion chamber to the heating zone through the second air outlet to heat the rotating drum; an ash outlet is provided at the bottom side of the combustion chamber, and an exhaust pipe connected to the heating zone is provided at the top of the pyrolysis box;

[0012] The combustion chamber is also provided with a solid phase inlet and a second air inlet. The solid phase inlet is connected to the solid phase outlet, and the second air inlet is connected to the first air outlet, so as to introduce the solid phase products and non-condensable gaseous products into the combustion chamber for combustion.

[0013] As a further improvement of this utility model, a flange is fixedly provided on the inner wall of the pyrolysis box near the axial ends of the rotating drum. The flange is provided with an inner cavity, and a bearing is provided in the inner cavity. The axial ends of the rotating drum are respectively inserted into the two bearings. The solid phase outlet and the gas phase outlet are respectively connected to the inner cavity of the flange.

[0014] The top of the flange is provided with a third air outlet communicating with the inner cavity, and the third air outlet is connected to the first air inlet.

[0015] The flange has a first outlet at its bottom that communicates with the inner cavity and is connected to the pyrolysis box; the pyrolysis box has a second outlet at its bottom side and is connected to the solid inlet via a solid pipe.

[0016] As a further improvement of this utility model, the side of the rotating drum near the solid phase outlet is inclined downward, and the bottom plate of the pyrolysis tank is inclined downward on the side near the second outlet, so as to realize the conveying of the solid phase product after pyrolysis from the rotating drum to the combustion chamber.

[0017] As a further improvement of this utility model, temperature sensors are respectively installed on the inner wall of the high-temperature flue near the second gas outlet and at the axial center of the pyrolysis box;

[0018] And / or, a pressure sensor is installed at one end of the high-temperature flue near the pyrolysis box;

[0019] And / or, a blower is provided on one side of the combustion chamber, and the air outlet of the blower is connected to the inner cavity of the combustion chamber; the blower is connected to a control system to adjust the air volume input to the combustion chamber by the blower according to the heating temperature requirement in the pyrolysis chamber.

[0020] As a further improvement of this utility model, the condensation device includes a condenser, an inlet pipe, an outlet pipe, a liquid storage tank, and a gas storage tank; one end of the condenser is provided with a first inlet, and the other end is provided with a first outlet; one end of the inlet pipe is connected to the gas phase outlet, and the other end is connected to the first inlet; the liquid storage tank is connected to the condenser and is used to store the condensed liquid; one end of the outlet pipe is connected to the first outlet, and the other end is connected to the gas storage tank; a pump is provided on the gas storage tank to pump non-condensable gas phase products into the gas storage tank for storage, and the gas storage tank is connected to the second inlet of the combustion chamber to introduce the stored non-condensable gas phase products into the combustion chamber.

[0021] As a further improvement of this utility model, it also includes a feeding device, which includes a feeding hopper and a feeding pipe. The top of the feeding hopper is provided with a detachable top cover, the bottom of the feeding hopper is connected to one end of the feeding pipe, and the other end of the feeding pipe is connected to the feeding port.

[0022] The feed pipe is equipped with a spiral feed assembly, which is coaxially arranged with the rotating drum and can rotate axially.

[0023] As a further improvement of this utility model, the two ends of the rotating drum are coaxially connected to rotating shafts; one of the rotating shafts is driven by the rotating drive device, and the other rotating shaft is coaxially connected to the screw feed assembly.

[0024] As a further improvement of this utility model, the feeding device further includes an inert gas assembly, the outlet of which is connected to the feeding hopper, so as to introduce inert gas into the rotating drum to achieve an oxygen-deficient condition before feeding, and a one-way valve is provided at the feeding port to prevent air from entering during the feeding process.

[0025] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0026] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include:

[0027] (1) The agricultural film pyrolysis furnace of this utility model is provided with a rotating drum in the pyrolysis box and a heating zone between the rotating drum and the pyrolysis box to heat and pyrolyze the material input into the rotating drum. The rotating drum is used to achieve dynamic heating of the material and reduce coking during the pyrolysis process. The gas phase outlet of the rotating drum is connected to a condensing device to condense and recover condensable gas phase products and store them, and output non-condensable gas phase products. A solid phase outlet is provided on the rotating drum to output the solid phase products after pyrolysis.

[0028] (2) The agricultural film pyrolysis furnace of this utility model has multiple blades on the inner wall of the rotating drum to dynamically cut and stir the material, break up the material accumulation, form a uniform thin layer, shorten the pyrolysis reaction time, and improve the pyrolysis efficiency of the material; at the same time, the dynamic stirring action of the blades can peel off the coke formed during the pyrolysis process in real time, and avoid coking and adhering to the inner wall of the rotating drum.

[0029] (3) The agricultural film pyrolysis furnace of this utility model is equipped with a combustion chamber, so that the high-temperature flue gas generated after the fuel in the combustion chamber is burned is introduced into the heating zone to provide efficient and uniform heating for the pyrolysis chamber and improve the heat transfer efficiency in the pyrolysis chamber; at the same time, by connecting the combustion chamber with the solid phase outlet of the rotating drum and the gas outlet of the condensation device, the output non-condensable gaseous products and solid products are directly introduced into the combustion chamber for combustion to supply energy to the rotating drum, thereby reducing the consumption of external energy and realizing closed-loop self-supply of energy.

[0030] (4) The agricultural film pyrolysis furnace of this utility model is equipped with temperature sensors corresponding to the high-temperature flue and the pyrolysis chamber respectively to monitor the axial temperature distribution of the high-temperature flue gas in the pyrolysis chamber in real time; at the same time, a blower is set in the corresponding combustion chamber and the blower is connected to the control system so as to dynamically adjust the air volume of the blower according to the real-time monitoring of the temperature sensor and the temperature required for pyrolysis, thereby adjusting the temperature of the high-temperature flue gas so that it is always kept within the optimal temperature range required for pyrolysis.

[0031] (5) The agricultural film pyrolysis furnace of this utility model has a reasonable structure, which can realize efficient pyrolysis, improve pyrolysis efficiency, and realize energy closed loop, reducing the consumption of external energy. It has good application prospects and promotion value. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of the agricultural film pyrolysis furnace in this embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the overall structure of the agricultural film pyrolysis furnace from another perspective in an embodiment of this utility model;

[0035] Figure 3 This is a plan view of the agricultural film pyrolysis furnace in an embodiment of this utility model;

[0036] Figure 4This is a partial structural cross-sectional view of the agricultural film pyrolysis furnace in an embodiment of this utility model;

[0037] Figure 5 This is a schematic diagram of the structure of the pyrolysis chamber and combustion chamber in an embodiment of this utility model;

[0038] Figure 6 This is a cross-sectional view (AA) of the agricultural film pyrolysis furnace in an embodiment of this utility model;

[0039] Figure 7 This is a schematic diagram of the structure of the rotating drum in an embodiment of this utility model;

[0040] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Feeding device; 11. Feeding pipe; 12. Inert gas assembly; 13. Feeding hopper; 2. Pyrolysis chamber; 21. Flange; 22. Cover plate; 23. Solid phase pipe; 24. Base plate; 25. Baffle; 26. Rotating drum; 261. Feed inlet; 27. Blade; 28. Rotating shaft; 29. ​​Pyrolysis box; 291. Heating zone; 292. Second outlet; 3. Combustion chamber; 31. High-temperature flue; 32. Ash outlet; 33. Blower; 34. Temperature sensor; 35. Pressure sensor; 36. Second air outlet; 37. Solid phase inlet; 4. Support frame; 41. Motor; 5. Condensation device; 51. Liquid storage tank; 52. Condenser; 53. Air inlet pipe; 6. Exhaust pipe. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0042] In the description of this utility model, it should be understood that, unless otherwise explicitly specified and limited, the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 this utility model and 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 this utility model.

[0043] Furthermore, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] Example:

[0047] Please see Figures 1 to 7 The agricultural film pyrolysis furnace in the preferred embodiment of this utility model includes a feeding device 1, a pyrolysis chamber 2, a combustion chamber 3, and a condensing device 5. The feeding device 1 feeds material into the pyrolysis chamber 2, and the high-temperature flue gas generated by the combustion chamber 3 heats the pyrolysis chamber 2, so that the material is pyrolyzed in the pyrolysis chamber 2. The condensable gaseous products are condensed and stored by the condensing device 5, and the non-condensable gaseous products and solid products are secondary combusted by the combustion chamber 3 to provide energy, so as to realize the full resource utilization of the material.

[0048] Specifically, such as Figures 1-3 As shown, the feeding device 1 includes a feeding hopper 13, a feeding pipe 11, and a screw feeding assembly; wherein, the top of the feeding hopper 13 is provided with a detachable top cover, and the bottom is connected to one end of the feeding pipe 11; correspondingly, the other end of the feeding pipe 11 is connected to the pyrolysis chamber 2.

[0049] Meanwhile, a spiral feeding assembly is provided in the feed pipe 11, which can rotate axially to continuously push the material to be pyrolyzed in the feed hopper 13 into the pyrolysis chamber 2.

[0050] Preferably, the feeding device 1 further includes an inert gas assembly 12, the outlet of which is connected to the feed hopper 13, so as to fill the rotating drum 26 with inert gas before feeding, forming an inert gas environment to achieve oxygen-deficient conditions and ensure that the pyrolysis reaction of the material is carried out in an oxygen-free or low-oxygen environment. In actual operation, the inert gas can be nitrogen, argon, etc.

[0051] Furthermore, such as Figure 4 As shown in the figure, the pyrolysis chamber 2 in the preferred embodiment includes a pyrolysis box 29 and a rotating drum 26; wherein, the rotating drum 26 is disposed inside the pyrolysis box 29 and can rotate relative to the pyrolysis chamber 2 along its own axis under the drive of the rotating drive device, so that when the material enters the rotating drum 26 for pyrolysis, the rotation of the rotating drum 26 ensures the uniformity of heating during the pyrolysis of the agricultural film.

[0052] Meanwhile, a heating zone 291 is provided in the space between the outer wall of the rotating drum 26 and the inner wall of the pyrolysis box 29 so that the high-temperature flue gas in the combustion chamber 3 can be introduced into the heating zone 291 to heat the rotating drum 26.

[0053] Specifically, a feed inlet 261 is provided at one end of the rotating drum 26. The feeding device 1 is connected to the feed inlet 261 of the rotating drum 26, and a one-way valve is provided at the feed inlet 261 to prevent air from entering the rotating drum 26 during the feeding process, so as to maintain the oxygen-deficient condition. A solid phase outlet and a gas phase outlet are provided at the other end of the rotating drum 26. The solid phase outlet is used to output the solid phase product after the material is pyrolyzed, and the gas phase outlet is used to output the gas phase product after the material is pyrolyzed. In actual configuration, the solid phase outlet and the gas phase outlet can be two different outlets, or they can be combined into one outlet.

[0054] Meanwhile, the rotating drum 26 is set to tilt downward at a certain angle on the side near the solid phase outlet, more preferably 5°, so that the rotating drum 26 can move and output the pyrolysis products from the feed to the discharge direction.

[0055] In actual production, the tilting angle of the rotating drum 26 can be adjusted in conjunction with the rotation speed of the rotating drive device to control the tilting conveying efficiency of the rotating drum 26, so that the material can be kept in the rotating drum 26 for a certain period of time. Preferably, the material is kept in the rotating drum 26 for about 15 minutes.

[0056] Preferably, such as Figures 6-7As shown, multiple sets of blade assemblies are welded circumferentially at intervals on the inner wall of the rotating drum 26. Each set of blade assemblies has multiple crescent-shaped blades 27 spaced axially to stir and crush the material, break up material accumulation, form a uniform thin layer, increase the contact area with the solid heat carrier, and enable the solid heat carrier to quickly and evenly transfer heat to the material, thereby improving the speed of the decomposition reaction. At the same time, the blades 27 can scrape the inner wall of the rotating drum 26 to remove the coke formed during the pyrolysis process in real time, preventing coke from adhering to the inner wall.

[0057] like Figure 7 As shown, the blade angle is preferably 45°. Four sets of blade assemblies are evenly spaced along the circumferential direction on the inner wall of the rotating drum 26. The number of blades 27 spaced along the axial direction in each set of blade assemblies is specifically determined according to the axial length of the rotating drum 26, and the axial spacing is preferably 5cm.

[0058] Furthermore, rotating shafts 28 are coaxially connected to both ends of the rotating drum 26; one rotating shaft 28 is driven by a rotating drive device, and the other rotating shaft 28 is coaxially connected to a screw feed assembly. In a preferred embodiment, the rotating drive device is a motor 41, which drives the rotating shaft 28 to rotate synchronously, thereby driving the rotating drum 26 to rotate synchronously; correspondingly, the rotating shaft 28 connected to the other end of the rotating drum 26 drives the screw feed assembly to rotate synchronously.

[0059] Furthermore, flanges 21 are fixedly installed on the inner walls of the pyrolysis chamber 29 near the two axial ends of the rotating drum 26. The flanges 21 have inner cavities, and bearings are installed at one end of the inner cavity near the rotating drum 26. The two axial ends of the rotating drum 26 are respectively inserted into the bearings on both sides, so that the rotating drum 26 can rotate relative to the pyrolysis chamber 2.

[0060] Furthermore, in the preferred embodiment, an ash outlet 32 ​​is provided on the combustion chamber 3. The ash outlet 32 ​​is specifically located at the bottom side of the combustion chamber 3 so as to fill fuel into the combustion chamber 3 through the ash outlet 32 ​​and discharge waste residue.

[0061] Specifically, the combustion chamber 3 is located below the pyrolysis chamber 2 and is separated from the pyrolysis chamber 2 by the bottom plate 24. At the same time, the combustion chamber 3 is provided with a second air outlet 36, and the second air outlet 36 is connected to the heating zone 291 through the externally provided high-temperature flue 31, so as to transport the high-temperature flue gas generated after the fuel combustion in the combustion chamber 3 to the heating zone 291 through the high-temperature flue 31 to heat the rotating drum 26 and provide heat for the pyrolysis of the material.

[0062] Meanwhile, an exhaust pipe 6 is provided at the top of the pyrolysis box 29 to discharge the flue gas inside the pyrolysis box 29, and it is further preferred that the exhaust pipe 6 is connected to a flue gas purification device (not shown in the figure) to purify the flue gas.

[0063] Preferably, baffles 25 are provided axially at intervals on the inner wall of the pyrolysis chamber 2, and each baffle 25 is staggered circumferentially to form a baffle-type flue in the pyrolysis chamber 2, thereby extending the flow path of the high-temperature flue gas on the outer wall of the rotating drum 26 and thus extending the residence time of the high-temperature flue gas in the pyrolysis box 29.

[0064] Preferably, a blower 33 is also provided in the combustion chamber 3. The air outlet of the blower 33 is connected to the inner cavity of the combustion chamber 3. More preferably, the blower 33 is located on the side of the combustion chamber 3 away from the high-temperature flue 31, so that when the combustion chamber 3 is working, the blower 33 delivers combustion air to the combustion zone of the combustion chamber 3 to ensure that the fuel is fully burned.

[0065] Preferably, temperature sensors 34 are respectively installed on the inner wall of the high-temperature flue 31 near the second gas outlet 36 and at the axial center of the pyrolysis box 29, so as to monitor the temperature of the high-temperature flue gas and the axial temperature distribution in the pyrolysis chamber 2.

[0066] Preferably, the blower 33 is connected to the PLC control system to dynamically adjust the air volume delivered by the blower 33 to the combustion chamber 3 according to the real-time temperature in the pyrolysis chamber 2, so as to dynamically adjust the temperature of the high-temperature flue gas and keep the temperature in the pyrolysis chamber 2 at the optimal pyrolysis temperature.

[0067] Preferably, a pressure sensor 35 is installed at one end of the high-temperature flue 31 near the pyrolysis box 29 to monitor the pressure of the high-temperature flue gas in the high-temperature flue 31, prevent abnormal pressure in the flue, and ensure the safe operation of the entire pyrolysis reaction device.

[0068] Preferably, the gas phase outlet and solid phase outlet of the rotating drum 26 are respectively connected to the inner cavity of the flange 21, and a first outlet connected to the inner cavity of the flange 21 is provided at the bottom of the flange 21, and the first outlet is connected to the pyrolysis box 29; at the same time, a second outlet 292 is provided at the bottom side of the pyrolysis box 29, and a solid phase inlet 37 is provided on the combustion chamber 3. The second outlet 292 and the solid phase inlet 37 are connected through a solid phase pipe 23, thereby realizing the connection between the solid phase outlet and the combustion chamber 3, so as to transport the solid phase products and solid phase heat carrier generated after pyrolysis in the rotating drum 26 to the combustion chamber 3, and perform secondary combustion to supply energy for the solid phase products.

[0069] Preferably, the bottom plate 24 is tilted downward on the side near the second outlet 292, and more preferably the tilt angle is 5°, to facilitate the movement and discharge of solid products and solid heat carrier in the pyrolysis chamber 2.

[0070] Further, in the preferred embodiment, the condensation device 5 includes a condenser 52, an inlet pipe 53, an outlet pipe, a liquid storage tank 51, and a gas storage tank. One end of the inlet pipe 53 is connected to a third outlet located at the top of the flange 21, which is connected to the inner cavity, thereby connecting the inlet pipe 53 to the gas phase outlet of the rotating drum 26. Correspondingly, the other end of the inlet pipe 53 is connected to the first inlet of the condenser 52 to allow gaseous products to be introduced into the condenser 52. The condenser 52 preferably employs a circulating cooling water system to condense the gaseous products using circulating cooling water. The liquid storage tank 51 is connected to the condenser 52, and condensable gaseous products are condensed into liquid by the condenser 52 and then stored in the liquid storage tank 51. One end of the outlet pipe is connected to the first outlet of the condenser 52, and the other end is connected to the gas storage tank. A pump is installed on the gas storage tank to pump non-condensable gaseous products into the gas storage tank for storage.

[0071] Preferably, the gas storage tank is connected to the second air inlet provided on the combustion chamber 3 so that the non-condensable gaseous products are introduced into the combustion chamber 3 for direct combustion and energy supply.

[0072] Preferably, the pyrolysis chamber 2 has openings on the rotating shafts 28 at both ends of the rotating drum 26, so that the two rotating shafts 28 can be connected to the motor 41 and the screw feed assembly respectively, and the openings are closed by the cover plate 22.

[0073] Furthermore, it also includes a support frame 4 to mount each device on the support frame 4, ensuring the stability of the device installation. Among them, the combustion chamber 3 is fixed to the support frame 4 by a load-bearing bracket.

[0074] In actual use, the material to be pyrolyzed can be mixed with the solid heat carrier and fed into the feed hopper 13, and inert gas can be introduced into the rotating drum 26 through the inert gas component 12. Then, fuel is fed into the combustion chamber 3 for combustion. The high-temperature flue gas generated by combustion enters the pyrolysis chamber 2 through the high-temperature flue 31 to preheat the rotating drum 26 to the pyrolysis temperature and maintain the heating. Then, the material is fed into the rotating drum 26 through the screw feed component. The material entering the rotating drum 26 moves in the discharge direction. During the movement, the material is cut and stirred by the blades 27 and pyrolyzed at high temperature. The condensable gaseous products generated by pyrolysis are condensed into liquid by the condenser 5 and stored. The non-condensable gaseous products and solid products generated by pyrolysis are sent into the combustion chamber 3 for combustion to provide energy. The generated slag is sent out through the ash outlet 32.

[0075] Furthermore, the generated slag includes the residue after the combustion of solid products and the deactivated solid heat carrier. Subsequently, the residue and the deactivated solid heat carrier can be separated by a sieving device. The solid heat carrier can be recycled after activation and regeneration, and the residue can be used to prepare gel materials, thereby realizing the full resource utilization of the materials.

[0076] The agricultural film pyrolysis furnace of this invention has a reasonable structure, which can achieve efficient pyrolysis, improve pyrolysis efficiency, and realize energy closed loop, reducing the consumption of external energy. It has good application prospects and promotion value.

[0077] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An agricultural film pyrolysis furnace, characterized in that, Includes a pyrolysis chamber and a condensation unit; The pyrolysis chamber includes a pyrolysis box and a rotating drum; the rotating drum is disposed inside the pyrolysis box and can rotate relative to the pyrolysis box under the drive of a rotation drive device; a heating zone is provided between the pyrolysis box and the rotating drum to heat the rotating drum; One end of the rotating drum is provided with a feed inlet for inputting materials; the other end of the rotating drum is provided with a solid phase outlet and a gas phase outlet. The solid phase outlet is used to output the solid phase products after material pyrolysis, and the gas phase outlet is used to output the gas phase products after material pyrolysis. The condensation device is provided with a first air inlet at one end and a first air outlet at the other end. The first air inlet is connected to the gas phase outlet to condense condensable gas phase products into liquid for storage, and to output non-condensable gas phase products through the first air outlet.

2. The agricultural film pyrolysis furnace according to claim 1, characterized in that, Multiple sets of blade assemblies are arranged circumferentially on the inner wall of the rotating drum, and multiple blades are arranged axially within each set of blade assemblies to chop and mix the material. And / or, The inner wall of the pyrolysis chamber is provided with baffles spaced axially, and the baffles are staggered circumferentially to form a baffle-type flue in the heating zone.

3. The agricultural film pyrolysis furnace according to claim 1, characterized in that, It also includes a combustion chamber, on which a second air outlet is provided; the second air outlet is connected to the heating zone through a high-temperature flue, so that the high-temperature flue gas generated by combustion in the combustion chamber is transported to the heating zone through the second air outlet to heat the rotating drum; an ash outlet is provided at the bottom side of the combustion chamber, and an exhaust pipe connected to the heating zone is provided at the top of the pyrolysis box; The combustion chamber is also provided with a solid phase inlet and a second air inlet. The solid phase inlet is connected to the solid phase outlet, and the second air inlet is connected to the first air outlet, so as to introduce the solid phase products and non-condensable gaseous products into the combustion chamber for combustion.

4. The agricultural film pyrolysis furnace according to claim 3, characterized in that, Flanges are fixedly installed on the inner wall of the pyrolysis tank near the axial ends of the rotating drum. The flanges have inner cavities, and bearings are installed in the inner cavities. The axial ends of the rotating drum are respectively inserted into the two bearings. The solid phase outlet and the gas phase outlet are respectively connected to the inner cavity of the flange. The top of the flange is provided with a third air outlet communicating with the inner cavity, and the third air outlet is connected to the first air inlet. The flange has a first outlet at its bottom that communicates with the inner cavity and is connected to the pyrolysis box; the pyrolysis box has a second outlet at its bottom side and is connected to the solid inlet via a solid pipe.

5. The agricultural film pyrolysis furnace according to claim 4, characterized in that, The rotating drum is tilted downwards on the side near the solid phase outlet, and the bottom plate of the pyrolysis tank is tilted downwards on the side near the second outlet, so as to realize the conveying of the solid phase product after pyrolysis from the rotating drum to the combustion chamber.

6. The agricultural film pyrolysis furnace according to claim 3, characterized in that, Temperature sensors are respectively installed on the inner wall of the high-temperature flue near the second air outlet and at the axial center of the pyrolysis box. And / or, a pressure sensor is installed at one end of the high-temperature flue near the pyrolysis box; And / or, a blower is provided on one side of the combustion chamber, and the air outlet of the blower is connected to the inner cavity of the combustion chamber; the blower is connected to a control system to adjust the air volume input to the combustion chamber by the blower according to the heating temperature requirement in the pyrolysis chamber.

7. The agricultural film pyrolysis furnace according to claim 3, characterized in that, The condensation device includes a condenser, an inlet pipe, an outlet pipe, a liquid storage tank, and a gas storage tank. The condenser has a first inlet at one end and a first outlet at the other. One end of the inlet pipe is connected to the gas phase outlet, and the other end is connected to the first inlet. The liquid storage tank is connected to the condenser and is used to store the condensed liquid. One end of the outlet pipe is connected to the first outlet, and the other end is connected to the gas storage tank. The gas storage tank is equipped with a pump to pump non-condensable gaseous products into the tank for storage, and the gas storage tank is connected to the second inlet of the combustion chamber to introduce the stored non-condensable gaseous products into the combustion chamber.

8. The agricultural film pyrolysis furnace according to claim 1, characterized in that, It also includes a feeding device, which includes a feeding hopper and a feeding pipe. The top of the feeding hopper is provided with a detachable top cover, the bottom of the feeding hopper is connected to one end of the feeding pipe, and the other end of the feeding pipe is connected to the feeding port. The feed pipe is equipped with a spiral feed assembly, which is coaxially arranged with the rotating drum and can rotate axially.

9. The agricultural film pyrolysis furnace according to claim 8, characterized in that, The two ends of the rotating drum are coaxially connected to rotating shafts; one rotating shaft is driven by the rotating drive device, and the other rotating shaft is coaxially connected to the screw feed assembly.

10. The agricultural film pyrolysis furnace according to claim 8, characterized in that, The feeding device also includes an inert gas assembly, the outlet of which is connected to the feeding hopper to introduce inert gas into the rotating drum to achieve an oxygen-deficient condition before feeding, and a one-way valve is provided at the feeding port to prevent air from entering during the feeding process.

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