CN215592993U

CN215592993U - Microwave cracking system capable of feeding continuously

Info

Publication number: CN215592993U
Application number: CN202022263939.0U
Authority: CN
Inventors: 李骅; 潘兴家; 李旭辉; 耿春雷; 王居飞; 张富嘉; ***庚
Original assignee: Nanjing Agricultural University
Current assignee: Nanjing Agricultural University
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2022-01-21
Anticipated expiration: 2030-09-29

Abstract

The utility model discloses a microwave cracking system capable of continuously feeding, which consists of a feeding system (1), a microwave reaction system (2) and a discharging system (3); the feeding system (1) mainly comprises a feeding cabin (1-1), a feeding rotor (1-2), a feeding channel (1-3), a feeding motor (1-4), an electric feeding valve (1-5), a feeding auger (1-6), a feeding pipeline (1-7) and a feeding motor (1-8); the microwave reaction system (2) mainly comprises a main shaft motor (2-1), a stirring auger (2-2), a lower side magnetron group (2-3), a reaction cavity (2-4), a frame (2-5), a front side magnetron group (2-6) and an upper side magnetron group (2-7); the discharging system (3) mainly comprises a discharging channel (3-1), a discharging auger (3-2), a discharging motor (3-3), an electric discharging valve (3-4), a cooling tower (3-5), a cooling tower exhaust pipe (3-7), a cooling tower air inlet pipe (3-8) and a slag storage tank (3-9); the utility model has the advantages of meeting the requirements of continuous microwave pyrolysis hydrogen production of various agricultural wastes and providing possibility for sustainable development of energy.

Description

Microwave cracking system capable of feeding continuously

Technical Field

The utility model relates to equipment for performing high-temperature pyrolysis on agricultural wastes such as straws and wood and kitchen waste in an oxygen-deficient environment by using microwaves as a heating source, belonging to the field of resource utilization of solid wastes.

Background

With the development of society and the gradual consumption of primary energy, the search for a novel renewable energy source becomes one of the problems that must be solved on the way of human sustainable development. China can generate a large amount of agricultural wastes every year. The main method for treating the solid waste is direct combustion, but the method not only has low energy utilization efficiency, but also causes atmospheric pollution. Microwave heating is gradually applied to the treatment of agricultural wastes in recent years, and can realize selective heating of the agricultural wastes and obtain a higher temperature rise rate. The utility model uses microwave as heating source to crack agricultural waste at high temperature in oxygen-deficient environment, so as to produce product with high utilization value.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to design a microwave cracking system capable of continuously feeding, which can efficiently convert agricultural wastes into utilizable high-added-value products; the equipment can realize the large-batch treatment of agricultural wastes; in the reaction cavity, the agricultural wastes are heated to the high temperature of 600 ℃ by microwaves under the oxygen-free environment, and the biogas, the bio-oil and the biochar with high utilization value are cracked, so that the problem of environmental pollution caused by the agricultural wastes is solved, and the microwave pyrolysis method is also an important step for transferring the agricultural wastes from the laboratory research stage to the pilot plant equipment.

The utility model provides a microwave cracking system capable of continuously feeding, which comprises: the microwave heating device comprises a feeding system (1), a microwave heating system (2) and a discharging system (3). The first part of feeding system and the second part of microwave heating cracking system are connected with the reaction cavity (2-4) through a feeding pipeline (1-7) in a welding manner; the second part of microwave heating pyrolysis system and the third part of discharge system are provided with two connecting parts, namely a reaction cavity (2-4) and a discharge channel (3-1) which are connected by welding; the joint is positioned at the lower side of the tail end of the reaction cavity (2-4); the reaction cavity (2-4) is connected with the cooling tower air inlet pipe (3-8) through a bolt, and the connection position is positioned on the upper side of the tail end of the reaction cavity (2-4).

The feeding system (1) is composed of a feeding cabin (1-1), a feeding rotor (1-2), a feeding channel (1-3), a feeding motor (1-4), an electric feeding valve (1-5), a feeding auger (1-6), a feeding pipeline (1-7) and a feeding motor (1-8), wherein the feeding cabin (1-1), the feeding rotor (1-2), the feeding channel (1-3), the electric feeding valve (1-5) and the feeding pipeline (1-7) are coaxially connected through bolts in sequence, the feeding auger (1-6), the feeding pipeline (1-7) and the feeding motor (1-8) are coaxially installed, the feeding motor (1-4) drives the feeding rotor (1-2) to uniformly feed materials placed in the feeding cabin (1-1) to the feeding pipeline (1-7), the feeding motor (1-8) drives the feeding auger (1-6) to feed the materials into the reaction cavity (2-4) at a constant speed.

The microwave heating cracking system (2) is composed of a main shaft motor (2-1), a stirring auger (2-2), a lower side magnetron group (2-3), a reaction cavity (2-4), a frame (2-5), a front side magnetron group (2-6) and an upper side magnetron group (2-7), wherein the magnetron groups are fastened on the upper surface, the lower surface and the front surface of the reaction cavity (2-4) by bolts in sequence, the lower side magnetron group (2-3) and the upper side magnetron group (2-7) are composed of 12 magnetrons, the lower side magnetron group (2-3) and the upper side magnetron group (2-7) are equally divided into two lines which are arranged uniformly in sequence, the installation directions of the adjacent magnetrons are staggered by 90 degrees to prevent the magnetrons from interfering with each other, and the front side magnetron group (2-6) is also in the same arrangement mode, the number is only 8; the reaction cavity (2-4) is fixed on the frame (2-5) by means of self gravity; when the device works, the main shaft motor (2-1) drives the stirring auger (2-2) to stir materials, so that the materials are uniformly heated, and the reaction is ensured to be carried out simultaneously.

The discharging system (3) consists of a discharging channel (3-1), a discharging auger (3-2), a discharging motor (3-3), an electric discharging valve (3-4), a cooling tower (3-5), an exhaust pipe (3-7), an air inlet pipe (3-8), a slag storage tank (3-9) and an air outlet hole (3-10); gas generated in the reaction of the reaction cavity (2-4) is discharged from the gas outlet holes (3-10), enters the cooling tower (3-5) along the gas inlet pipes (3-8), after being cooled by the cooling tower (3-5), the flow stopping valve (3-6) can be opened, liquefied bio-oil flows out from the cooling tower and is collected, and residual gas is discharged from the cooling tower exhaust pipe (3-7); after an electric discharge valve (3-4) is opened, the residual biochar after the biomass reaction falls into a discharge channel (3-1) through self weight, and a discharge motor (3-3) drives a discharge auger (3-2) to convey residues to a residue storage tank (3-9).

Drawings

FIG. 1 is a schematic view of a continuous microwave pyrolysis apparatus of the present invention;

FIG. 2 is a schematic view of the discharge channel and discharge auger of the present invention.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

As shown in figure 1, the microwave cracking system capable of continuous feeding mainly comprises three parts, wherein the first part is a feeding system (1), the second part is a microwave heating cracking system (2), and the third part is a discharging system (3).

The embodiment of the feed system (1) is as follows: firstly, opening an electric feeding valve (1-6), then respectively operating a feeding motor (1-4) to start a feeding rotor (1-2), operating a feeding motor (1-8) to drive a feeding auger (1-7), allowing agricultural wastes contained in a feeding cabin (1-1) to fall down through self weight, and falling to a feeding pipeline (1-7) at a constant speed under the action of the feeding motor (1-4), and conveying the materials to a reaction cavity (2-4) under the action of the feeding auger (1-6); when the materials are added to a sufficient amount, the feeding motors (1-4) and the feeding motors (1-9) are closed, the feeding rotors (1-2) and the feeding packing augers (1-7) stop running, and the electric feeding valves (1-5) are closed.

After the feeding is finished, the microwave heating cracking system (2) can be started after the electric feeding valves (1-5) and the electric discharging valves (3-4) are determined to be closed, so that gas can be discharged from the gas outlet holes (3-10), the reaction cavity (2-4) has a closed environment, no oxygen enters during the reaction, and the material is prevented from falling into the discharging channel (3-1) when the stirring auger (2-2) runs; then, the front side magnetron (2-6) is started, the upper side magnetron (2-7) and the lower side magnetron (2-3) heat the product, and meanwhile, the spindle motor (2-1) drives the stirring auger (2-2) to stir the material in the stirring auger so as to ensure that the material is heated more uniformly and the cracking reaction of the material is integrally carried out at the same time; biogas generated by the reaction is discharged from the air outlet holes (3-10) in time and enters the cooling tower (3-5) through the air inlet pipe (3-8); after the biogas is cooled by the cooling towers (3-5), the bio-oil doped in the biogas can be condensed into liquid; the flow stop valve (3-6) is opened, the liquefied bio-oil flows out to be collected, and the residual gas is discharged from the cooling tower exhaust pipe (3-7).

After the reaction is finished, an electric discharging valve (3-4) is opened, a main shaft motor (2-1) is operated to drive a stirring auger (2-2) to convey reaction residues to the tail end of a reaction cavity (2-4) so that the reaction residues fall into a discharging channel (3-1), the discharging motor (3-3) drives a discharging auger (3-2), the residues are conveyed to a residue storage tank (3-9), the electric discharging valve (3-4) is closed after the residues are conveyed out, and the main shaft motor (2-1) and the discharging motor (2-2) are closed.

At the end of this reaction cycle, the reaction mass is again reacted if necessary, again according to the previous feed and operating mode.

The utility model has been described in terms of preferred embodiments, but it is not intended to be limited to the disclosed embodiments, and it is intended that all technical alternatives, equivalents and permutations that can be obtained thereby are within the scope of the utility model.

Claims

1. A microwave pyrolysis system capable of feeding continuously is characterized in that: the device consists of three parts, wherein the first part is a feeding system (1), the second part is a microwave heating cracking system (2), and the third part is a discharging system (3); the first part of feeding system and the second part of microwave heating cracking system are connected with the reaction cavity (2-4) through a feeding pipeline (1-7) in a welding manner; the second part of microwave heating pyrolysis system and the third part of discharge system are provided with two connecting parts, namely a reaction cavity (2-4) and a discharge channel (3-1) which are connected by welding; the joint is positioned at the lower side of the tail end of the reaction cavity (2-4); the reaction cavity (2-4) is connected with the cooling tower air inlet pipe (3-8) through a bolt, and the connection position is positioned on the upper side of the tail end of the reaction cavity (2-4).

2. The microwave pyrolysis system capable of continuously feeding according to claim 1, wherein the feeding system (1) comprises a feeding cabin (1-1), a feeding rotor (1-2), a feeding channel (1-3), a feeding motor (1-4), an electric feeding valve (1-5), a feeding auger (1-6), a feeding pipeline (1-7) and a feeding motor (1-8), wherein the feeding cabin (1-1), the feeding rotor (1-2), the feeding channel (1-3), the electric feeding valve (1-5) and the feeding pipeline (1-7) are coaxially connected through bolts, the feeding auger (1-6), the feeding pipeline (1-7) and the feeding motor (1-8) are coaxially arranged, and the feeding motor (1-4) drives the feeding rotor (1-2) to be placed in the feeding cabin (1-1) The material of the-1) is uniformly fed into a feeding pipeline (1-7), and a feeding motor (1-8) drives a feeding auger (1-6) to feed the material into a reaction cavity (2-4) at a constant speed.

3. The microwave pyrolysis system capable of feeding continuously as claimed in claim 1, wherein the microwave heating pyrolysis system (2) comprises a spindle motor (2-1), a stirring auger (2-2), a lower side magnetron group (2-3), a reaction cavity (2-4), a frame (2-5), a front side magnetron group (2-6), and an upper side magnetron group (2-7), wherein the magnetron groups are fastened to the upper, lower, and front sides of the reaction cavity (2-4) by bolts in sequence, the lower side magnetron group (2-3) and the upper side magnetron group (2-7) are each composed of 12 magnetrons, wherein the lower side magnetron group (2-3) and the upper side magnetron group (2-7) are equally divided into two rows and are arranged uniformly in sequence, the installation directions of adjacent magnetrons are staggered by 90 degrees, the magnetron groups (2-6) on the front side are arranged in the same way and the number is only 8; the reaction cavity (2-4) is fixed on the frame (2-5) by means of self gravity; when the device works, the main shaft motor (2-1) drives the stirring auger (2-2) to stir materials, so that the materials are uniformly heated, and the reaction is ensured to be carried out simultaneously.

4. The microwave cracking system capable of continuously feeding according to claim 1, wherein the discharging system (3) is composed of a discharging channel (3-1), a discharging auger (3-2), a discharging motor (3-3), an electric discharging valve (3-4), a cooling tower (3-5), an exhaust pipe (3-7), an air inlet pipe (3-8), a slag storage tank (3-9) and an air outlet hole (3-10); gas generated in the reaction of the reaction cavity (2-4) is discharged from the gas outlet holes (3-10), enters the cooling tower (3-5) along the gas inlet pipes (3-8), after being cooled by the cooling tower (3-5), the flow stopping valve (3-6) can be opened, liquefied bio-oil flows out from the cooling tower and is collected, and residual gas is discharged from the cooling tower exhaust pipe (3-7); after an electric discharge valve (3-4) is opened, the residual biochar after the biomass reaction falls into a discharge channel (3-1) through self weight, and a discharge motor (3-3) drives a discharge auger (3-2) to convey residues to a residue storage tank (3-9).