A nitrogen circulation structure for a recycling apparatus

Abstract

This utility model discloses a nitrogen circulation structure for a recycling device, belonging to the technical field of recycling equipment, and solves the problem of fire hazards in existing recycling equipment. It includes a gas supply pipe and a circulation pipe connected to the discharge pipe of a shredder. The gas supply pipe is connected to a nitrogen tank via an electromagnetic inlet valve, and the circulation pipe is connected to an exhaust pipe and a negative pressure pipe. An electromagnetic exhaust valve is installed on the exhaust pipe, and the negative pressure pipe is connected to the discharge pipe of a crusher via a one-way valve. This utility model reduces the oxygen concentration in the shredder and crusher by introducing nitrogen into the discharge pipe of the shredder, thereby significantly reducing the fire risk. Furthermore, to reduce nitrogen consumption and control costs, the nitrogen entering the discharge pipe of the shredder is recovered from the crusher discharge pipe to the circulation pipe via the negative pressure pipe and then re-enters the shredder discharge pipe.

Description

Technical Field

[0001] This utility model relates to the field of recycling equipment technology, and specifically to a nitrogen circulation structure for recycling equipment. Background Technology

[0002] In recycling equipment for waste household appliances, heat is generated due to friction and tearing. For example, Chinese patent CN210546966U discloses a waste refrigerator dismantling and crushing recycling line. During the material recycling process, the heat generated by the shredder and crusher includes frictional heat generated when the blades tear the metal casing and electrochemical heat generated by the contact of the positive and negative electrodes of a ruptured lithium battery. However, during the material conveying process, air can simultaneously enter the equipment. Combined with the heat within the recycling equipment, this could potentially lead to a fire during the recycling process, posing a safety hazard. Utility Model Content

[0003] To address the aforementioned problems in the prior art, this utility model provides a nitrogen circulation structure for a recycling device, which solves the problem of potential fire hazards in existing recycling devices.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A nitrogen circulation structure for a recovery device is provided, including a make-up air pipe and a circulation pipe connected to the discharge pipe of a shredder; the make-up air pipe is connected to a nitrogen tank through an electromagnetic inlet valve, the circulation pipe is connected to an exhaust pipe and a negative pressure pipe respectively, an electromagnetic exhaust valve is installed on the exhaust pipe, and the negative pressure pipe is connected to the discharge pipe of a crusher through a one-way valve; wherein, an oxygen concentration sensor is installed in the discharge pipe of the shredder, and the oxygen concentration sensor, the electromagnetic inlet valve and the electromagnetic exhaust valve are all electrically connected to a controller.

[0006] The beneficial effects of this solution are as follows: by adding nitrogen to the discharge pipe of the shredder, the oxygen concentration in the shredder and crusher is reduced, thereby significantly reducing the risk of fire. In order to reduce nitrogen consumption and control costs, the nitrogen entering the discharge pipe of the shredder is recovered from the discharge pipe of the crusher to the circulation pipe through a negative pressure pipe and then re-enters the discharge pipe of the shredder. At the same time, in order to avoid oxygen accumulation during the circulation process, when the oxygen concentration sensor detects that the oxygen reaches the set value, the controller will open the electromagnetic exhaust valve and the electromagnetic intake valve in sequence to release oxygen and replenish nitrogen, ensuring that the oxygen concentration in the shredder and crusher is always maintained at a low level.

[0007] Furthermore, a negative pressure fan is installed in the negative pressure pipeline. The negative pressure fan provides negative pressure to ensure that the gas from the crusher's discharge pipeline enters the circulation pipeline.

[0008] Furthermore, the air inlet of the negative pressure pipeline is connected to the air outlet of the cyclone separator, and the air inlet of the cyclone separator is connected to the crusher's discharge pipeline. The cyclone separator intercepts metal dust generated by the crushed material, purifies the circulating gas, and prevents particulate matter from clogging the pipeline.

[0009] Furthermore, the outlet of the cyclone separator is connected to a heat exchanger used to cool the gas in the crusher's discharge pipe. The heat exchanger reduces the heat of the gas, thus reducing the risk of fire.

[0010] Furthermore, filters are installed at the connections between the air supply pipe and the circulation pipe and the shredder's discharge pipe. These filters prevent crushed material from entering the pipes.

[0011] Furthermore, the exhaust end of the exhaust pipe is connected to the waste gas recovery equipment. The waste gas recovery equipment centrally treats the waste gas to meet environmental protection requirements.

[0012] Furthermore, the oxygen concentration sensor is externally fitted with a protective cover fixed to the top of the shredder's discharge pipe. This protective cover protects the oxygen concentration sensor and helps maintain the continuity of oxygen monitoring data.

[0013] Furthermore, the crusher's discharge pipe is connected to the screw feeder's inlet. The screw feeder can avoid the impact of negative pressure pipes on the conveyed materials.

[0014] Furthermore, a pressure valve connected to the controller signal is installed on the outlet of the nitrogen tank. The pressure valve facilitates the determination of the nitrogen level in the tank, allowing users to replenish the nitrogen in a timely manner.

[0015] Furthermore, the controller is a PLC, which is suitable for industrial environments. Attached Figure Description

[0016] Figure 1 A schematic diagram of the nitrogen circulation structure used in the recovery equipment;

[0017] The components include: 1. Air supply pipe; 11. Electromagnetic air inlet valve; 12. Nitrogen tank; 2. Circulation pipe; 3. Exhaust pipe; 31. Electromagnetic exhaust valve; 32. Waste gas recovery equipment; 4. Negative pressure fan; 5. Heat exchanger; 6. Cyclone separator; 7. Tearer discharge pipe; 8. Crusher discharge pipe. Detailed Implementation

[0018] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0019] This embodiment provides a nitrogen circulation structure for a recovery device, which addresses the fire hazard problem inherent in existing recovery devices. A detailed demonstration follows.

[0020] refer to Figure 1 A nitrogen circulation structure for a recovery device includes a make-up gas pipe 1 and a circulation pipe 2.

[0021] One end of both the air supply pipe 1 and the circulation pipe 2 is connected to the discharge pipe 7 of the shredder, and the other end of the air supply pipe 1 is connected to the nitrogen tank 12 through the electromagnetic air inlet valve 11. In order to prevent crushed material from entering the pipe, a filter screen is installed at the connection between the air supply pipe 1 and the circulation pipe 2 and the discharge pipe 7 of the shredder.

[0022] The other end of the circulation pipe 2 is connected to the exhaust pipe 3 and the negative pressure pipe, respectively. The exhaust pipe 3 is equipped with an electromagnetic exhaust valve 31, and the exhaust end of the exhaust pipe 3 is connected to the waste gas recovery device 32. The waste gas recovery device 32 centrally treats the waste gas to meet environmental protection requirements.

[0023] A negative pressure fan 4 is installed in the negative pressure pipeline to provide negative pressure, and the negative pressure pipeline is connected to the crusher discharge pipeline 8 through a one-way valve. The crusher discharge pipeline 8 is connected to the feed inlet of the screw feeder. The screw feeder can avoid the negative pressure pipeline from affecting the conveyed material.

[0024] An oxygen concentration sensor is installed in the discharge pipe 7 of the shredder. This sensor detects oxygen concentration to prevent oxygen accumulation during nitrogen circulation. A protective cover is fixed to the top of the discharge pipe 7. This cover protects the sensor and ensures continuous oxygen monitoring data. A pressure valve is installed at the outlet of the nitrogen tank 12. This valve allows for easy determination of the nitrogen level in the tank, facilitating timely replenishment by the user. In this embodiment, the oxygen concentration sensor, electromagnetic inlet valve 11, electromagnetic exhaust valve 31, and pressure valve are all electrically connected to a controller, preferably a PLC.

[0025] To prevent particulate matter from clogging the pipes, the air inlet of the negative pressure pipe is connected to the air outlet of the cyclone separator 6, and the air inlet of the cyclone separator 6 is connected to the crusher discharge pipe 8. The cyclone separator 6 intercepts metal dust generated by the crushed material and purifies the circulating gas.

[0026] Considering the high temperature of the gas in the crusher discharge pipe 8, the outlet of the cyclone separator 6 is connected to a heat exchanger 5 for cooling the gas in the crusher discharge pipe 8 in order to reduce the heat of the gas. In this embodiment, the cyclone separator 6 is heat-resistant, and to reduce costs, the refrigerant in the heat exchanger 5 can be tap water or outside air.

[0027] In summary, the working principle of this solution is as follows:

[0028] Nitrogen in nitrogen tank 12 enters the shredder discharge pipe 7 through the gas replenishment pipe 1, reducing the oxygen concentration in the shredder and crusher. In order to reduce nitrogen consumption and control costs, the nitrogen entering the shredder discharge pipe 7 is recovered from the crusher discharge pipe 8 to the circulation pipe 2 through the negative pressure pipe and then enters the shredder discharge pipe 7 again. At the same time, in order to avoid oxygen accumulation during the circulation process, when the oxygen concentration sensor detects that the oxygen reaches the set value, the controller will open the electromagnetic exhaust valve 31 and the electromagnetic intake valve 11 in sequence to release oxygen and replenish nitrogen, ensuring that the oxygen concentration in the shredder and crusher is always maintained at a low concentration.

[0029] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A nitrogen circulation structure for a recovery device, characterized in that, It includes a gas supply pipe (1) and a circulation pipe (2) connected to the discharge pipe (7) of the shredder; the gas supply pipe (1) is connected to the nitrogen tank (12) through an electromagnetic air inlet valve (11), the circulation pipe (2) is connected to the exhaust pipe (3) and the negative pressure pipe respectively, the exhaust pipe (3) is equipped with an electromagnetic exhaust valve (31), and the negative pressure pipe is connected to the discharge pipe (8) of the crusher through a one-way valve; Among them, an oxygen concentration sensor is installed in the discharge pipe (7) of the shredder, and the oxygen concentration sensor, the electromagnetic inlet valve (11) and the electromagnetic exhaust valve (31) are all electrically connected to the controller.

2. The nitrogen circulation structure according to claim 1, characterized in that, A negative pressure fan (4) is installed in the negative pressure pipeline.

3. The nitrogen circulation structure according to claim 1, characterized in that, The air inlet of the negative pressure pipe is connected to the air outlet of the cyclone separator (6), and the air inlet of the cyclone separator (6) is connected to the discharge pipe (8) of the crusher.

4. The nitrogen circulation structure according to claim 3, characterized in that, The outlet of the cyclone separator (6) is connected to a heat exchanger (5) used to cool the gas in the crusher discharge pipe (8).

5. The nitrogen circulation structure according to claim 1, characterized in that, A filter screen is provided at the connection point between the air supply pipe (1) and the circulation pipe (2) and the discharge pipe (7) of the shredder.

6. The nitrogen circulation structure according to claim 1, characterized in that, The exhaust end of the exhaust pipe (3) is connected to the waste gas recovery device (32).

7. The nitrogen circulation structure according to claim 1, characterized in that, The oxygen concentration sensor is externally fitted with a protective cover fixed inside the top of the shredder discharge pipe (7).

8. The nitrogen circulation structure according to claim 1, characterized in that, The crusher discharge pipe (8) is connected to the feed inlet of the screw feeder.

9. The nitrogen circulation structure according to claim 1, characterized in that, The nitrogen tank (12) is equipped with a pressure valve that is connected to the controller signal at the outlet end.

10. The nitrogen circulation structure according to any one of claims 1 to 9, characterized in that, The controller is a PLC.

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