A heating furnace for pyrolysis of biochar

Abstract

A heating furnace for biochar pyrolysis, including a furnace chamber and a tooling assembly; the left and right side walls of the furnace chamber are symmetrically provided with a plurality of supporting assemblies, each supporting assembly includes at least two supporting units, each supporting unit includes a U-shaped channel steel, the bottom of the U-shaped channel steel is provided with a threaded through hole, a vertical screw is screwed into the threaded through hole, and a tray and a handwheel are provided at the upper and lower ends of the vertical screw respectively; the tooling assembly includes a clamping plate, and the four corners of the clamping plate are provided with vertical through holes, and the vertical through holes at each position of the tooling assembly are connected and fixed by bolts and nuts; at least one clamping plate is provided with a threaded blind hole corresponding to each supporting unit, and a horizontal screw is screwed into the threaded blind hole, and the far end of the horizontal screw is connected to a flat shaft through a coupling, and the width of the flat shaft matches the opening width of the channel steel. This heating furnace can continuously apply pressure to the material during pyrolysis, and the heat and force are uniform.

Description

Technical Field

[0001] The utility model relates to a heating furnace used for pyrolysis of biochar. Background Art

[0002] Biochar is an emerging material in the environmental field. It is mainly produced by the pyrolysis of organic or inorganic substances under constant high temperature and oxygen-deficient conditions. Its main component is carbon. Biochar has high adsorption capacity, and its adsorption performance is determined by the pyrolysis material, pyrolysis temperature and material structure. Studies have shown that biochar can not only adsorb ammonia nitrogen, phosphorus and heavy metal ions in wastewater and soil, but also improve soil flora and promote the conversion of soil nutrient content.

[0003] Studies have shown that biochar is widely used in wastewater treatment and soil remediation industries, but due to its poor structural properties after carbonization, solid biochar often breaks due to hydraulic and extrusion factors in actual use, and often has problems such as difficulty in recycling, uncertain scope, poor structural properties, and low structural strength after being put into use. Therefore, biochar used to treat wastewater and soil has obvious effects on indicators such as ammonia nitrogen, phosphorus, and soil organic matter, and also has a certain effect on reducing the effective state of heavy metals in soil and wastewater, but for the total amount of heavy metals, the removal effect is not obvious, and the main reason is that biochar is difficult to collect after it is put into use. At present, biochar is widely used in various processes of wastewater treatment. Its main problem is that its unique loose porous structure leads to the looseness of its macroscopic structure, and often has problems such as difficulty in recycling, uncertain scope, poor structural properties, and low structural strength after being put into use.

[0004] Based on the above problems, studies have shown that when the raw materials of biochar are woven or pyrolyzed using materials such as bamboo strips and cowhide, the biochar will have a plate-like structure after pyrolysis, which is convenient for collection and application in soil and wastewater treatment fields. However, when making such biochar, the raw materials shrink due to carbonization during pyrolysis, resulting in the final biochar being broken due to shrinkage or curling. A common way to solve this problem is to use stone slabs to flatten it during pyrolysis. However, in actual use, stone slabs have problems such as uneven pressure, high risk of use, and uneven heating. Therefore, there is an urgent need for a device that can apply uniform pressure to objects during pyrolysis. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a heating furnace for pyrolysis of biochar, which can continuously apply pressure to the material during pyrolysis and the heat and force are uniform.

[0006] In order to solve the above technical problems, the utility model provides a heating furnace for biochar pyrolysis, comprising a rectangular furnace chamber with a door opened at the front side and a tooling assembly located in the furnace chamber;

[0007] A plurality of support assemblies are symmetrically arranged on the left and right side walls of the furnace chamber, each support assembly includes at least two support units with the same installation height and arranged in a front-to-back interval, each support unit includes a U-shaped channel steel horizontally arranged in the left-right direction and open on the upper side, each U-shaped channel steel has a threaded through hole vertically penetrating the bottom, a vertical screw is screwed into the threaded through hole, a horizontal tray is provided at the upper end of the vertical screw, and a hand wheel is provided at the lower end of the vertical screw;

[0008] The tooling assembly comprises a plurality of horizontally arranged and stacked rectangular clamping plates, each of which is provided with vertical through holes near four corners, the vertical through holes at corresponding positions on all the stacked clamping plates are coaxially arranged, and the vertical through holes at each position of the tooling assembly are connected and fixed by a bolt vertically penetrating all the vertical through holes at that position and the corresponding nut;

[0009] At least one of the several splints of the tooling assembly is provided with a left-right threaded blind hole on the left and right sides at a position corresponding to each supporting unit, and a horizontal screw is screwed into each threaded blind hole. The horizontal screw is connected to a flat shaft through a horizontal coupling along the side away from the splint in the left and right directions, and the width of the flat shaft matches the opening width of the U-shaped channel steel.

[0010] For the purpose of simple explanation, the heating furnace for biochar pyrolysis described in the present invention is referred to as the heating furnace below.

[0011] The method of using the heating furnace is as follows: before use, the tooling assembly is taken out from the furnace cavity, and the horizontal screw is removed, four bolts and nuts are disassembled, the raw materials to be pyrolyzed are flattened and placed between the clamps, and then all the clamps are vertically locked by bolts and nuts and appropriate torque is applied to the nuts according to the pressure requirements, and then the horizontal screw is screwed onto one of the clamps with a threaded blind hole, and a supporting assembly of appropriate height is selected according to the overall position of the tooling assembly in the furnace cavity, and the flat shaft on each horizontal screw is placed on the horizontal tray in the U-shaped channel steel at the corresponding position, and finally the tooling assembly is leveled and fine-tuned in height by turning the hand wheel.

[0012] Advantages of this heating furnace: In this heating furnace, a continuous pressure can be applied to the pyrolysis material through the tooling assembly to prevent it from curling and deforming. By controlling the locking torque of the bolts, the pressure can be accurately controlled and the pressure distribution is uniform. This heating furnace is equipped with multiple groups of supporting components of different heights, and each U-shaped channel steel is equipped with a horizontal tray that can be adjusted by a hand wheel. In this way, the entire tooling can be placed in a horizontal position in the middle of the furnace cavity when the number of tooling layers and thicknesses are different and the installation position of the horizontal screw is different, so that it is heated evenly, which greatly increases the flexibility of the entire tooling. The horizontal screw and the splint are connected by a detachable thread to facilitate the loading of the pyrolysis material and the storage of the tooling itself. The produced biochar can not only absorb ammonia nitrogen, phosphorus and heavy metal ions in wastewater and soil, but also improve the soil flora and promote the conversion of soil nutrient content. The utility model solves the problem of being unable to continuously apply uniform pressure during the pyrolysis process, and can pyrolyze biochar with uniform texture. It provides engineering and technical support for scientific research and product production. Its multi-layer structure can pyrolyze multiple layers of plate-like biochar at a time, greatly improving the output. It applies pressure with bolts to ensure uniform pressure during pyrolysis, and the texture and function of the produced plate-like biochar are more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the front view of the furnace chamber of this heating furnace.

[0014] Figure 2 yes Figure 1 A-direction view. DETAILED DESCRIPTION

[0015] See also Figure 1 , Figure 2 , a heating furnace for pyrolysis of biochar, comprising a rectangular furnace chamber 1 with a door opened at the front side and a tooling assembly 2 located in the furnace chamber 1;

[0016] A plurality of support assemblies are symmetrically arranged on the left and right side walls of the furnace chamber 1 and spaced apart from each other. Each support assembly includes at least two support units 3 with the same installation height and spaced apart from each other. Each support unit 3 includes a U-shaped channel steel 31 horizontally arranged in the left and right directions and open on the upper side. A threaded through hole 32 vertically passing through the bottom of each U-shaped channel steel 31 is provided. A vertical screw rod 33 is screwed into the threaded through hole 32. A horizontal tray 34 is provided at the upper end of the vertical screw rod 33, and a hand wheel 35 is provided at the lower end of the vertical screw rod 33.

[0017] The tooling assembly 2 comprises a plurality of horizontally arranged and stacked rectangular clamping plates 21, each of which is provided with vertical through holes 22 near four corners, and the vertical through holes 22 at corresponding positions on all the stacked clamping plates 21 are coaxially arranged, and the vertical through holes 22 at each position of the tooling assembly 2 are connected and fixed by a bolt 23 vertically penetrating all the vertical through holes 22 at that position and a corresponding nut 24;

[0018] At least one of the several splints 21 of the tooling assembly 2 is provided with a left-right threaded blind hole 211 on the left and right sides corresponding to each supporting unit 3, and a horizontal screw rod 4 is screwed into each threaded blind hole 211. The horizontal screw rod 4 is connected to a flat shaft 42 through a horizontal coupling 41 along the side away from the splint 21 in the left-right direction, and the width of the flat shaft 42 matches the opening width of the U-shaped channel steel 31.

[0019] The method of using the heating furnace is as follows: before use, the tooling assembly 2 is taken out from the furnace chamber 1, and the horizontal screw 4 is removed, the four bolts 23 and nuts 24 are disassembled, the raw materials to be pyrolyzed are flattened and placed between the clamps 21, and then all the clamps 21 are vertically locked by the bolts 23 and nuts 24 and appropriate torque is applied to the nuts 24 according to the pressure requirements, and then the horizontal screw 4 is screwed onto one of the clamps 21 having a threaded blind hole 211, and a supporting assembly of appropriate height is selected according to the overall position of the tooling assembly 2 in the furnace chamber 1, and the flat shaft 42 on each horizontal screw 4 is placed on the horizontal tray 34 in the U-shaped channel steel 31 at the corresponding position, and finally the tooling assembly 2 is leveled and fine-tuned in height by turning the hand wheel 35.

[0020] Advantages of this heating furnace: In this heating furnace, a continuous pressure can be applied to the pyrolysis material through the tooling assembly 2 to prevent it from curling and deforming. By controlling the locking torque of the bolt 23, the pressure can be accurately controlled and the pressure distribution is uniform. A plurality of supporting assemblies of different heights are provided in this heating furnace, and each U-shaped channel steel 31 is provided with a horizontal tray 34 that can be adjusted by a hand wheel 35. In this way, the entire tooling can be placed in a horizontal position in the middle of the furnace cavity 1 when the number of tooling layers and thicknesses are different and the installation position of the horizontal screw 4 is different, so that it is heated evenly, which greatly increases the flexibility of the use of the entire tooling. The horizontal screw 4 and the clamping plate 21 are connected by a detachable threaded connection to facilitate the loading of the pyrolysis material and the storage of the tooling itself.

Claims

1. A heating furnace for biochar pyrolysis, characterized in that: It includes a rectangular furnace chamber with a door on the front side and a tooling assembly located in the furnace chamber; A plurality of support assemblies are symmetrically arranged on the left and right side walls of the furnace chamber, each support assembly includes at least two support units with the same installation height and arranged in a front-to-back interval, each support unit includes a U-shaped channel steel horizontally arranged in the left-right direction and open on the upper side, each U-shaped channel steel has a threaded through hole vertically penetrating the bottom, a vertical screw is screwed into the threaded through hole, a horizontal tray is provided at the upper end of the vertical screw, and a hand wheel is provided at the lower end of the vertical screw; The tooling assembly comprises a plurality of horizontally arranged and stacked rectangular clamping plates, each of which is provided with vertical through holes near four corners, the vertical through holes at corresponding positions on all the stacked clamping plates are coaxially arranged, and the vertical through holes at each position of the tooling assembly are connected and fixed by a bolt vertically penetrating all the vertical through holes at that position and the corresponding nut; At least one of the several splints of the tooling assembly is provided with a left-right threaded blind hole on the left and right sides at a position corresponding to each supporting unit, and a horizontal screw is screwed into each threaded blind hole. The horizontal screw is connected to a flat shaft through a horizontal coupling along the side away from the splint in the left and right directions, and the width of the flat shaft matches the opening width of the U-shaped channel steel.

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