Oxygen recovery device of mining membrane nitrogen making device

Abstract

The utility model discloses an oxygen recovery device of a mining membrane nitrogen-making device, which comprises a mining flat car and further comprises a machine box fixedly arranged on the mining flat car, a buffer tank, a pressurizing mechanism and a cooling device are respectively arranged inside the machine box, the left end of the buffer tank is communicated with an air inlet pipe, the left end of the air inlet pipe penetrates out of the machine box, and the right end of the air inlet pipe is communicated with the machine box. A connecting flange is further arranged at the end part of the air inlet pipe; the buffer tank is located in the cooling device, and the cooling device is fixedly installed on the top of the mining flat car. The pressurizing mechanism is communicated with the bottom of the left end of the buffer tank through a pressurizing pipeline, the right end of the buffer tank is communicated with an exhaust pipeline, and the exhaust pipeline penetrates out of the machine box and is communicated with the liquid oxygen storage tank. According to the device, oxygen generated in the nitrogen making process can be conveyed into the liquid oxygen storage tank to be stored; and the liquid oxygen storage tank can be independently carried away, and a vacant liquid oxygen storage tank can be replaced.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen generation equipment, specifically an oxygen recovery device for a mining membrane nitrogen generation system. Background Technology

[0002] Membrane separation is a highly efficient separation technology widely used in gas separation, including nitrogen production. In membrane separation for nitrogen production, air is compressed and passed through a specially designed membrane. Due to the differences in size and properties of oxygen and nitrogen molecules, their permeability through the membrane differs. Generally, oxygen molecules are smaller and more reactive, making them easier to pass through the membrane, while nitrogen molecules are relatively more difficult to pass through. By adjusting the membrane properties and operating conditions, the separation efficiency of oxygen and nitrogen can be controlled. After membrane separation, we obtain a stream enriched in nitrogen and a stream enriched in oxygen.

[0003] For example, patent CN221432575U discloses a membrane separation nitrogen generator for coal mines, comprising: an air supply assembly; a filter assembly connected to the air supply assembly for filtering out oil, water, and dust particles from the air; a nitrogen-oxygen separation assembly including at least two membrane separators connected in parallel, each membrane separator containing a separation membrane, and each membrane separator having an oxygen outlet and a nitrogen outlet for supplying oxygen and nitrogen respectively, the nitrogen outlet being connected to a nitrogen discharge valve; and a mobile transport assembly on which the air supply assembly, filter assembly, and nitrogen-oxygen separation assembly are all mounted.

[0004] The aforementioned membrane separation nitrogen generator for coal mines uses a mobile transport component to move the gas supply component, filtration component, and nitrogen-oxygen separation component around the coal mine site, increasing the flexibility of the device and facilitating on-site nitrogen supply. Furthermore, the simultaneous separation of nitrogen and oxygen by multiple membrane separators improves nitrogen production efficiency and meets the nitrogen usage needs of different production sites. However, the disadvantage of the aforementioned patent is that, generally speaking, after air separation, oxygen is directly released into the environment, resulting in waste.

[0005] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this invention is to provide an oxygen recovery device for a mining membrane nitrogen generator, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An oxygen recovery unit for a mining membrane nitrogen generator includes a mining flatbed truck and a chassis fixedly mounted on the truck. The chassis contains a buffer tank, a pressurizing mechanism, and a cooling device. An air inlet pipe is connected to the left end of the buffer tank, extending out of the chassis, and a connecting flange is located at the end of the inlet pipe. The buffer tank is located inside the cooling device, which is fixedly mounted on the top of the mining flatbed truck. The pressurizing mechanism is connected to the bottom left of the buffer tank via a pressurizing pipe, and an exhaust pipe is connected to the right end of the buffer tank, extending out of the chassis and connecting to a liquid oxygen storage tank. A tank mounting base is located on the right side of the chassis. A semi-circular tank mounting groove is formed at the top of the tank mounting base, into which the liquid nitrogen storage tank is placed. A tank fixing plate is connected to the rear side of the tank mounting groove via a hinge.

[0009] Furthermore, the exhaust pipe is connected to the liquid oxygen storage tank via a movable joint.

[0010] Furthermore, the tank fixing plate is generally arc-shaped.

[0011] Furthermore, the pressurizing mechanism is an air compressor.

[0012] Furthermore, the liquid nitrogen storage tank is located outside the chassis.

[0013] Furthermore, a screw mounting seat is vertically provided at the front end of the tank mounting groove. A fisheye screw is rotatably connected to the screw mounting seat via a pin. A wing nut is threaded onto the fisheye screw. A slot is provided at the front end of the tank fixing plate. The fisheye screw is located in the slot, and the wing nut presses against the top of the slot of the tank fixing plate to prevent the front end of the tank fixing plate from coming out.

[0014] Furthermore, the front of the chassis is provided with an inspection door, through which the interior of the chassis can be inspected and maintained.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention can transport the oxygen generated during the nitrogen production process to the liquid oxygen storage tank for storage; it can also transport the liquid oxygen storage tank separately and replace the empty liquid oxygen storage tank. Attached Figure Description

[0017] Figure 1 This is a front view of the oxygen recovery unit in a mining membrane nitrogen production plant.

[0018] Figure 2 This is a schematic diagram of the internal structure of the oxygen recovery unit in a mining membrane nitrogen generation plant.

[0019] Figure 3This is a schematic diagram of the casing of the oxygen recovery unit in a mining membrane nitrogen generator.

[0020] Figure 4 for Figure 3 A magnified view of a portion of point a.

[0021] Figure 5 A schematic diagram of the fisheye screw in the oxygen recovery unit of a mining membrane nitrogen generator. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] Please see Figure 1-5 The oxygen recovery device of the mining membrane nitrogen generator includes a mining flatbed trolley 1 and a chassis 2 fixedly installed on the mining flatbed trolley 1. The chassis 2 contains a buffer tank 3, a pressurizing mechanism 4, and a cooling device 5. An air inlet pipe 301 is connected to the left end of the buffer tank 3, extending out of the chassis 2, and a connecting flange 302 is provided at the end of the air inlet pipe 301. The buffer tank 3 is located inside the cooling device 5, which is fixedly installed on the top of the mining flatbed trolley 1. The pressurizing mechanism 4 is connected to the bottom left end of the buffer tank 3 via a pressurizing pipe 401. An exhaust pipe 303 is connected to the right end of the buffer tank 3, extending out of the chassis 2 and connecting to a liquid oxygen storage tank 6. Specifically, the exhaust pipe 303 is connected to the liquid oxygen storage tank 6 via a movable joint.

[0024] In this solution, the pressurizing mechanism 4 is an air compressor;

[0025] In this design, the liquid nitrogen storage tank 6 is located outside the chassis 2;

[0026] Specifically, a tank mounting base 7 is provided on the right side of the chassis 2; a semi-circular tank mounting groove 701 is opened on the top of the tank mounting base 7, and the liquid nitrogen storage tank 6 is placed in the tank mounting groove 701. At the same time, a tank fixing plate 702 is connected to the rear side of the tank mounting groove 701 through a hinge drive. The tank fixing plate 702 is arc-shaped in whole.

[0027] The front end of the storage tank mounting groove 701 is vertically provided with a screw mounting seat 706. A fisheye screw 703 is rotatably connected to the screw mounting seat 706 via a pin. A wing nut 704 is threaded onto the fisheye screw 703. The front end of the storage tank fixing plate 702 is provided with a slot 705. The fisheye screw 703 is located in the slot 705, and the wing nut 704 presses against the top of the slot 705 of the storage tank fixing plate 702 to prevent the front end of the storage tank fixing plate 702 from coming out.

[0028] Optionally, the front of the chassis 2 is provided with an inspection door 201, through which the interior of the chassis 2 can be inspected and maintained.

[0029] When this utility model is in use, the air inlet pipe 301 can transport the oxygen discharged from the nitrogen generator to the buffer tank 3. Then, with the cooperation of the pressurizing mechanism 4 and the cooling device 5, the oxygen inside the buffer tank 3 can be pressurized and liquefied. After completion, the liquid oxygen can be transported to the liquid oxygen storage tank 6 for storage through the exhaust pipe 303. Then, the exhaust pipe 303 and the liquid oxygen storage tank 6 can be removed through the movable interface. At this time, the liquid oxygen storage tank 6 can be transported away separately and replaced with an empty liquid oxygen storage tank 6.

[0030] In the description of this utility model, it should be noted that the specific installation method, circuit connection method and control method of the air compressor and cooling device in this invention are all conventional designs and are conventional design methods of designers. The compressed air is liquefied by the air compressor and cooling device, and the air compressor and cooling device only need to meet the purpose of compressing and liquefying the air.

[0031] It should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. 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 component 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. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. An oxygen recovery apparatus for a mine film nitrogen generation apparatus, comprising a mine flat car, characterized by, It also includes a chassis fixedly mounted on a mining flatbed truck. The chassis contains a buffer tank, a pressurizing mechanism, and a cooling device. An air inlet pipe is connected to the left end of the buffer tank, extending out of the chassis, and a connecting flange is provided at the end of the air inlet pipe. The buffer tank is located inside the cooling device, which is fixedly mounted on the top of the mining flatbed truck. The pressurizing mechanism is connected to the bottom left end of the buffer tank via a pressurizing pipe, and an exhaust pipe is connected to the right end of the buffer tank, extending out of the chassis and connecting to a liquid oxygen storage tank. A storage tank mounting base is located on the right side of the chassis. A semi-circular cross-section storage tank mounting groove is formed at the top of the storage tank mounting base, and the liquid nitrogen storage tank is placed within this groove. A storage tank fixing plate is connected to the rear side of the storage tank mounting groove via a hinge.

2. The oxygen gas recovery device for the mine-used film nitrogen making apparatus according to claim 1, characterized by The exhaust pipe is connected to the liquid oxygen storage tank via a movable joint.

3. The oxygen gas recovery device for the mine-used film nitrogen making apparatus according to claim 1, characterized by The tank fixing plate is generally arc-shaped.

4. The oxygen gas recovery device for the mine-used film nitrogen making apparatus according to claim 1, characterized by The pressurizing mechanism is an air compressor.

5. The oxygen gas recovery device for the mine-used film nitrogen making apparatus according to claim 1, characterized by The liquid nitrogen storage tank is located outside the chassis.

6. The oxygen gas recovery device for the mine-used film nitrogen making apparatus according to claim 1, characterized by The front end of the tank mounting slot is vertically provided with a screw mounting seat. A fisheye screw is rotatably connected to the screw mounting seat via a pin. A wing nut is threaded onto the fisheye screw. A slot is opened at the front end of the tank fixing plate. The fisheye screw is located in the slot, and the wing nut presses against the top of the slot of the tank fixing plate to prevent the front end of the tank fixing plate from coming out.

7. The oxygen gas recovery device for the mine-used film nitrogen making apparatus according to claim 1, characterized by The front of the chassis is equipped with an inspection door, through which the interior of the chassis can be inspected and maintained.

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