CN-224221367-U - Agricultural film pyrolysis furnace

CN224221367UCN 224221367 UCN224221367 UCN 224221367UCN-224221367-U

Abstract

The utility model discloses an agricultural film pyrolysis furnace, which belongs to the technical field of agricultural film recovery treatment and comprises a pyrolysis chamber and a condensing device, wherein a rotating roller is arranged in the pyrolysis chamber, a heating zone is arranged between the rotating roller and the pyrolysis chamber so as to heat and pyrolyze materials input into the rotating roller, dynamic heating of the materials is realized through rotation of the rotating roller, coking phenomenon in the material pyrolysis process is reduced, a gas phase outlet of the rotating roller is communicated with the condensing device so as to condense and recover and store condensable gas phase products and output non-condensable gas phase products, and a solid phase outlet is arranged on the rotating roller so as to output the pyrolyzed solid phase products. The agricultural film pyrolysis furnace disclosed by the utility model is reasonable in structural arrangement, can realize high-efficiency pyrolysis, improves pyrolysis efficiency, can realize energy closed loop, reduces consumption of external energy sources, and has good application prospect and popularization value.

Inventors

CHEN SHUO
LI MINGRUI
LIU QINGSHAN
WANG ZHENZHEN
ZHANG YIXIN
CHEN XIAOYING
Mou Weifan
LIN XIAOQIU

Assignees

北京科技大学

Dates

Publication Date: 20260512
Application Date: 20250528

Claims (10)

1. The agricultural film pyrolysis furnace is characterized by comprising a pyrolysis chamber and a condensing device; The pyrolysis chamber comprises a pyrolysis box and a rotary roller, wherein the rotary roller is arranged in the pyrolysis box and can rotate relative to the pyrolysis box under the drive of a rotary driving device; the device comprises a rotary drum, a solid phase outlet and a gas phase outlet, wherein one end of the rotary drum is provided with a feed inlet for inputting materials, the other end of the rotary drum is provided with the solid phase outlet and the gas phase outlet, the solid phase outlet is used for outputting solid phase products after the materials are pyrolyzed, and the gas phase outlet is used for outputting gas phase products after the materials are pyrolyzed; One end of the condensing device is provided with a first air inlet, the other end of the condensing device is provided with a first air outlet, the first air inlet is communicated with the gas phase outlet so as to condense the condensable gas phase product into a liquid state and then store the liquid state, and the non-condensable gas phase product is output through the first air outlet.
2. The agricultural film pyrolysis furnace according to claim 1, wherein a plurality of groups of blade assemblies are circumferentially arranged on the inner wall of the rotary drum at intervals, and a plurality of blades are axially arranged in each group of blade assemblies at intervals so as to cut and stir materials; And/or the number of the groups of groups, Baffles are arranged on the inner wall of the pyrolysis box at intervals along the axial direction, the baffles are distributed in a staggered mode along the circumferential direction, and a baffling flue is formed in the heating area.
3. The agricultural film pyrolysis furnace according to claim 1, further comprising a combustion chamber, wherein a second air outlet is arranged on the combustion chamber, the second air outlet is communicated with the heating zone through a high-temperature flue so as to convey high-temperature flue gas generated by combustion of the combustion chamber to the heating zone through the second air outlet to heat the rotary drum, an ash outlet is arranged at the bottom of the side edge of the combustion chamber, and an exhaust pipe communicated with the heating zone is arranged 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 communicated with the solid phase outlet, and the second air inlet is communicated with the first air outlet so as to respectively introduce solid phase products and non-condensable gas phase products into the combustion chamber for combustion.
4. The agricultural film pyrolysis furnace according to claim 3, wherein flanges are fixedly arranged on the inner walls of the pyrolysis box, which are close to the two axial ends of the rotary drum, and are provided with inner cavities, bearings are arranged in the inner cavities, and the two axial ends of the rotary drum are respectively penetrated in the two bearings; The top of the flange is provided with a third air outlet communicated with the inner cavity, and the third air outlet is communicated with the first air inlet; The bottom of the flange is provided with a first outlet communicated with the inner cavity, the first outlet is communicated with the pyrolysis box, the bottom of the side edge of the pyrolysis box is provided with a second outlet, and the second outlet is communicated with the solid-phase inlet through a solid-phase pipeline.
5. The agricultural film pyrolysis furnace according to claim 4, wherein a side of the rotating drum adjacent to the solid phase outlet is inclined downward, and a bottom plate of the bottom of the pyrolysis tank is inclined downward adjacent to a side of the second outlet to achieve transportation of solid phase products from the rotating drum to the combustion chamber after pyrolysis.
6. A agricultural film pyrolysis furnace according to claim 3, wherein temperature sensors are respectively arranged on one end of the high-temperature flue close to the second air outlet and on the inner wall of the pyrolysis box at the axial center position; and/or a pressure sensor is arranged at one end of the high-temperature flue close to the pyrolysis box; And/or one side of the combustion chamber is provided with a blower, an air outlet of the blower is communicated with the inner cavity of the combustion chamber, and the blower is connected with a control system to adjust the air quantity of the blower input into the combustion chamber according to the heating temperature requirement in the pyrolysis chamber.
7. The agricultural film pyrolysis furnace according to claim 3, wherein the condensing device comprises a condenser, an air inlet pipe, an air outlet pipe, a liquid storage tank and an air storage tank, wherein a first air inlet is formed in one end of the condenser, a first air outlet is formed in the other end of the condenser, one end of the air inlet pipe is communicated with the gas phase outlet, the other end of the air inlet pipe is communicated with the first air inlet, the liquid storage tank is communicated with the condenser and used for storing condensed liquid, one end of the air outlet pipe is communicated with the first air outlet, the other end of the air outlet pipe is communicated with the air storage tank, a pump is arranged on the air storage tank to pump non-condensable gas phase products into the air storage tank to be stored, and the air storage tank is communicated with a second air inlet of the combustion chamber to enable the stored non-condensable gas phase products to be introduced into the combustion chamber.
8. The agricultural film pyrolysis furnace according to claim 1, further comprising a feeding device, wherein the feeding device comprises a feeding hopper and a feeding pipe, a detachable top cover is arranged at the top of the feeding hopper, the bottom of the feeding hopper is communicated with one end of the feeding pipe, and the other end of the feeding pipe is communicated with the feeding port; the feeding pipe is internally provided with a spiral feeding assembly, and the spiral feeding assembly and the rotary roller are coaxially arranged and can axially rotate.
9. The agricultural film pyrolysis furnace according to claim 8, wherein two ends of the rotary drum are coaxially connected with rotary shafts, respectively, one rotary shaft is in driving connection with the rotary driving device, and the other rotary shaft is coaxially connected with the spiral feeding assembly.
10. The agricultural film pyrolysis furnace according to claim 8, wherein the feeding device further comprises an inert gas component, an air outlet end of the inert gas component is communicated with the feed hopper, inert gas is introduced into the rotary drum to reach an anoxic condition before feeding, and a one-way valve is arranged at the feed inlet to prevent air from entering during feeding.

Description

Agricultural film pyrolysis furnace Technical Field The utility model belongs to the technical field of agricultural film recovery treatment, and particularly relates to an agricultural film pyrolysis furnace. Background The agricultural film is used in millions of tons in a year, the residual rate is up to more than 40%, and serious white pollution is formed. The conventional treatment technology generally comprises a landfill method and an incineration method, wherein the landfill method is easy to cause soil hardening, the incineration method can generate pollutants such as dioxin, and the conventional pyrolysis technology has the problems of low heat transfer efficiency, serious coking, high energy consumption, low added value of products and the like, so that the green treatment requirement under the 'double carbon' target is difficult to meet. Disclosure of utility model Aiming at one or more of the defects or improvement demands of the prior art, the utility model provides an agricultural film pyrolysis furnace which can realize efficient and uniform heat transfer, energy closed loop and full product recycling in the pyrolysis process. In order to achieve the above object, the present utility model provides an agricultural film pyrolysis furnace, which comprises a pyrolysis chamber and a condensing device; The pyrolysis chamber comprises a pyrolysis box and a rotary roller, wherein the rotary roller is arranged in the pyrolysis box and can rotate relative to the pyrolysis box under the drive of a rotary driving device; the device comprises a rotary drum, a solid phase outlet and a gas phase outlet, wherein one end of the rotary drum is provided with a feed inlet for inputting materials, the other end of the rotary drum is provided with the solid phase outlet and the gas phase outlet, the solid phase outlet is used for outputting solid phase products after the materials are pyrolyzed, and the gas phase outlet is used for outputting gas phase products after the materials are pyrolyzed; One end of the condensing device is provided with a first air inlet, the other end of the condensing device is provided with a first air outlet, the first air inlet is communicated with the gas phase outlet so as to condense the condensable gas phase product into a liquid state and then store the liquid state, and the non-condensable gas phase product is output through the first air outlet. As a further improvement of the utility model, a plurality of groups of blade assemblies are arranged on the inner wall of the rotary drum at intervals along the circumferential direction, and a plurality of blades are arranged in each group of blade assemblies at intervals along the axial direction so as to cut and stir materials; And/or the number of the groups of groups, Baffles are arranged on the inner wall of the pyrolysis box at intervals along the axial direction, the baffles are distributed in a staggered mode along the circumferential direction, and a baffling flue is formed in the heating area. The utility model further provides a combustion chamber, which is provided with a second air outlet, wherein the second air outlet is communicated with the heating zone through a high-temperature flue so as to convey high-temperature flue gas generated by combustion of the combustion chamber to the heating zone through the second air outlet to heat the rotary drum; The combustion chamber is also provided with a solid phase inlet and a second air inlet, the solid phase inlet is communicated with the solid phase outlet, and the second air inlet is communicated with the first air outlet so as to respectively introduce solid phase products and non-condensable gas phase products into the combustion chamber for combustion. As a further improvement of the utility model, the inner wall of the pyrolysis box, which is close to the two axial ends of the rotary drum, is fixedly provided with a flange, the flange is provided with an inner cavity, a bearing is arranged in the inner cavity, and the two axial ends of the rotary drum are respectively penetrated in the two bearings; The top of the flange is provided with a third air outlet communicated with the inner cavity, and the third air outlet is communicated with the first air inlet; The bottom of the flange is provided with a first outlet communicated with the inner cavity, the first outlet is communicated with the pyrolysis box, the bottom of the side edge of the pyrolysis box is provided with a second outlet, and the second outlet is communicated with the solid-phase inlet through a solid-phase pipeline. As a further improvement of the utility model, the side of the rotary drum close to the solid phase outlet is inclined downwards, and the side of the bottom plate of the bottom of the pyrolysis box close to the second outlet is inclined downwards, so that the solid phase products after pyrolysis are conveyed from the rotary drum to the combustion chamber. As a further improvement of the util