CN217202567U

CN217202567U - Gas recovery device applied to extraction of N-methyl pyrrolidone

Info

Publication number: CN217202567U
Application number: CN202220925841.3U
Authority: CN
Inventors: 顾德华; 李亚东; 高艳华
Original assignee: Zhenjiang Xinna Environmental Protection Materials Co ltd
Current assignee: Zhenjiang Xinna Environmental Protection Materials Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-08-16
Anticipated expiration: 2032-04-20

Abstract

The utility model relates to a be applied to and draw gas recovery unit of N-methyl pyrrolidone, including the waste gas passageway, be equipped with the separation cover in the waste gas passageway inner chamber, the separation cover is cylindric and sets up in waste gas passageway center, the both ends of separation cover set up and with waste gas passageway inner wall connection for the flaring, form the ventilation chamber between separation cover outer wall and the waste gas passageway inner wall, waste gas passageway lateral wall is located ventilation chamber department and is connected with out the tuber pipe, waste gas passageway lateral wall one end is equipped with the air-supply line, air-supply line one end enters into waste gas passageway center and is connected with the shunt tubes, shunt tubes one end is connected and is equipped with a plurality of heat exchange tubes, a plurality of heat exchange tubes are located the inboard of separation cover and along circumference evenly distributed setting, the end of heat exchange tube is the setting of buckling and runs through the separation cover lateral wall, make heat exchange tube and ventilation chamber be linked together. The heat exchange tube adopts the U-shaped structure setting, has increased with the area of contact of high temperature waste gas, cooperates first heat exchanger fin simultaneously, can improve effective heat exchange efficiency, realizes the high-efficient recovery of NMP waste gas waste heat.

Description

Gas recovery device applied to extraction of N-methyl pyrrolidone

Technical Field

The utility model belongs to the technical field of NMP retrieves, concretely relates to be applied to and draw gas recovery unit of N-methyl pyrrolidone.

Background

NMP is an irreplaceable organic solvent in the lithium battery industry and other industries, and is expensive, NMP waste gas is generated by a coating machine in the production process of a lithium battery, the temperature of the NMP waste gas is generally about 110 ℃, meanwhile, a large amount of fresh air is supplemented into the coating machine, the generated NMP waste gas can seriously pollute the environment, and the NMP waste gas has higher economic value and is worth recycling the waste gas. The existing recovery device mainly adopts a cooling spraying method and a condensing method to separate NMP from waste gas, and high-temperature NMP waste gas cannot make full use of the rest heat, so that waste is easily caused.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model discloses a be applied to and draw gas recovery unit of N-methyl pyrrolidone has solved the problem that waste heat recovery device heat recovery efficiency is low among the prior art.

The specific technical scheme is as follows:

a gas recovery device applied to extracting N-methylpyrrolidone comprises a waste gas channel, wherein a separation cover is arranged in an inner cavity of the waste gas channel, the separation cover is cylindrical and is arranged in the center of the waste gas channel, two ends of the separation cover are flared and fixedly connected with the inner wall of the waste gas channel, a closed ventilation cavity is formed between the outer wall of the separation cover and the inner wall of the waste gas channel, a wind outlet pipe is connected at the position, located in the ventilation cavity, of the side wall of the waste gas channel and communicated with the ventilation cavity, the wind outlet pipe is connected with a coating machine, one end of the side wall of the waste gas channel is provided with a wind inlet pipe in a penetrating mode, one end of the wind inlet pipe is connected with a fan, the wind outlet end of the fan is connected with the wind inlet pipe, the other end of the wind inlet pipe enters the center of the waste gas channel and is bent by 90 degrees, the bent end of the wind inlet pipe is connected with a flow dividing pipe, and one end, which is far away from the wind inlet pipe, is horizontally connected with a plurality of heat exchange pipes, a plurality of the heat exchange tube is the annular arrangement and sets up in the one end of shunt tubes, and the heat exchange tube all is the setting of U-shaped structure, and a plurality of heat exchange tubes are located the inboard of separation cover and set up along circumference evenly distributed, and the end of heat exchange tube is the setting of buckling and runs through the separation cover lateral wall for the heat exchange tube is linked together with the ventilation chamber.

Furthermore, a group of first heat exchange fins are arranged at one end of the outer side of each heat exchange tube, each group of first heat exchange fins is composed of a plurality of first heat exchange fins arranged, and one end of each group of first heat exchange fins is fixedly connected with the inner wall of the separation cover.

Furthermore, gaps are reserved between every two adjacent groups of first heat exchange fins to form an exhaust channel.

Furthermore, two sides of the first heat exchange plate are obliquely arranged.

Furthermore, the outer walls of the two ends of the separating cover are provided with a circle of accommodating groove, and a circle of sealing gasket is arranged in the accommodating groove.

Further, the number of the heat exchange tubes is not less than 6.

Furthermore, a plurality of second heat exchange fins are arranged on the outer wall of the separation cover along the circumferential direction.

The beneficial effects of the utility model are embodied in:

(1) the utility model discloses a heat exchange tube and the contact of high temperature waste gas that a plurality of align to grid set up in the exhaust gas channel can heat and carry to the coating machine to the air in the heat exchange tube to realize heat recovery, can reduce the heat energy consumption of coating machine, reduction in production cost.

(2) The utility model discloses well heat exchange tube adopts the U-shaped structure setting, has increased with the area of contact of high temperature waste gas, cooperates the heat exchanger fin simultaneously, can improve effective heat exchange efficiency, realizes the high-efficient recovery of NMP waste gas waste heat.

Drawings

Fig. 1 is a schematic structural diagram of the middle exhaust gas pipeline of the present invention.

Fig. 2 is a longitudinal sectional view of the exhaust gas pipe of the present invention.

The heat exchanger comprises an exhaust gas channel 1, a separation cover 2, a containing groove 21, a sealing gasket 22, a ventilation cavity 3, an air outlet pipe 4, an air inlet pipe 5, a flow dividing pipe 6, a heat exchange pipe 7, a first heat exchange fin 8, a second heat exchange fin 9 and a blower 10.

Detailed Description

For making the technical scheme of the utility model clear more clearly and definitely, it is right to combine the drawing below the utility model discloses further describe, any is right the utility model discloses technical scheme's technical characteristic carries out the scheme that equivalent replacement and conventional reasoning reachs and all falls into the utility model discloses protection scope. The utility model discloses in the fixed connection who mentions, fixed setting is the general connected mode among the mechanical field, and welding, bolt and nut are connected and the screw connection is all can.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1-2, a gas recycling device for extracting N-methylpyrrolidone, comprises a waste gas channel 1, a separating hood 2 is arranged in an inner cavity of the waste gas channel 1, the separating hood 2 is cylindrical and is arranged at the center of the waste gas channel 1, two ends of the separating hood 2 are flared and fixedly connected with an inner wall of the waste gas channel 1, so that a closed ventilation cavity is formed between an outer wall of the separating hood 2 and the inner wall of the waste gas channel 1, an air outlet pipe 4 is connected to a position of a side wall of the waste gas channel 1, which is located at the ventilation cavity, the air outlet pipe 4 is communicated with the ventilation cavity, the air outlet pipe 4 is connected with a coating machine, an air inlet pipe 5 penetrates through one end of the side wall of the waste gas channel 1, one end of the air inlet pipe 5 is connected with an air blower 10, an air outlet end of the air blower 10 is connected with the air inlet pipe 5, and the other end of the air inlet pipe 5 enters the center of the waste gas channel 1 and is bent at 90 degrees, and the one end connection of buckling of air-supply line 5 is equipped with shunt tubes 6, the one end horizontally connected that shunt tubes 6 kept away from air-supply line 5 is equipped with a plurality of heat exchange tubes 7, and is a plurality of heat exchange tubes 7 are the annular arrangement and set up in the one end of shunt tubes 6, and heat exchange tubes 7 all are the setting of U-shaped structure, and a plurality of heat exchange tubes 7 are located the inboard of partition cover 2 and set up along circumference evenly distributed, and the end of heat exchange tubes 7 is the setting of buckling and runs through partition cover 2 lateral wall for heat exchange tubes 7 are linked together with the ventilation chamber, wherein the one end that goes out 4 one ends of tuber pipe and heat exchange tubes 7 is located the both ends of partition cover 2 respectively.

Furthermore, each heat exchange tube 7 is provided with a group of first heat exchange fins 8 at one end of the outer side thereof, each group of first heat exchange fins 8 is composed of a plurality of first heat exchange fins 8 arranged along the axial direction of the separation cover 2, and one end of each group of first heat exchange fins 8 is fixedly connected with the inner wall of the separation cover 2.

Furthermore, gaps are reserved between every two adjacent groups of first heat exchange fins 8, and an exhaust channel is formed.

Furthermore, two sides of the first heat exchange fin 8 are obliquely arranged.

Furthermore, a circle of accommodating groove 21 is formed in the outer walls of the two ends of the separating hood 2, and a circle of sealing gasket 22 is arranged in the accommodating groove 21, so that the sealing performance of the ventilation cavity 3 is guaranteed.

Further, the number of the heat exchange tubes 7 is not less than 6.

Furthermore, a plurality of second heat exchange fins 9 are arranged on the outer wall of the separation cover 2 along the circumferential direction.

The working principle is as follows: during operation, the air blower 10 conveys outside air into the air inlet pipe 5, the air in the air inlet pipe 5 is respectively conveyed to the plurality of heat exchange pipes 7 through the flow dividing pipes 6, the air is contacted with high-temperature waste gas in the waste gas channel 1 through the heat exchange pipes 7, meanwhile, under the heat conduction action of the first heat exchange fins 8, the air in the heat exchange pipes 7 is heated, then, the air in the heat exchange pipes 7 completely enters the ventilation cavity 3, the air is further heated after the heat exchange of the second heat exchange fins 9, and finally, the air in the separating cover 2 is discharged to the coating machine from the air outlet pipe 4.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a be applied to and draw gas recovery unit of N-methyl pyrrolidone, includes exhaust passage (1), its characterized in that, be equipped with separation cover (2) in exhaust passage (1) inner chamber, separation cover (2) are cylindric and set up in exhaust passage (1) center, and the both ends of separation cover (2) are flaring setting and with exhaust passage (1) inner wall fixed connection, make to form inclosed ventilation chamber between the outer wall of separation cover (2) and the inner wall of exhaust passage (1), exhaust passage (1) lateral wall position department in ventilation chamber is connected with out tuber pipe (4), it is linked together with ventilation chamber to go out tuber pipe (4), and goes out tuber pipe (4) and be connected with the coating machine, and exhaust passage (1) lateral wall one end runs through and is equipped with air-supply line (5), the one end of air-supply line (5) is connected with air-blower (10), and the air-out end of air-blower (10) is connected with air-supply line (5), and air-supply line (5) other end enters into exhaust gas passageway (1) center and is 90 settings of buckling, and the one end of just buckling of air-supply line (5) is connected and is equipped with shunt tubes (6), the one end horizontal connection that air-supply line (5) were kept away from in shunt tubes (6) is equipped with a plurality of heat exchange tubes (7), and is a plurality of heat exchange tubes (7) are the annular and arrange and set up in the one end of shunt tubes (6), and heat exchange tubes (7) all are the setting of U-shaped structure, and a plurality of heat exchange tubes (7) are located the inboard of partition cover (2) and set up along circumference evenly distributed, and the end of heat exchange tubes (7) is the setting of buckling and run through partition cover (2) lateral wall for heat exchange tubes (7) are linked together with the ventilation chamber.

2. The gas recovery device for extracting N-methylpyrrolidone, according to claim 1, is characterized in that a set of first heat exchange fins (8) is disposed on one end of the outer side of each heat exchange tube (7), each set of first heat exchange fins (8) is composed of a plurality of first heat exchange fins (8) which are arranged in an array, and one end of each set of first heat exchange fins (8) is fixedly connected with the inner wall of the separation cover (2).

3. The gas recovery device for extracting N-methylpyrrolidone, according to claim 2, is characterized in that a gap is left between two adjacent sets of first heat exchange fins (8) and forms a ventilation channel.

4. A gas recovery device for N-methylpyrrolidone extraction, according to claim 3, wherein said first heat exchanger fins (8) are inclined on both sides.

5. The gas recovery device for extracting N-methylpyrrolidone according to claim 1, wherein a circle of receiving groove (21) is provided on the outer wall of both ends of said separation cover (2), and a circle of sealing gasket (22) is provided in said receiving groove (21).

6. A gas recovery device for N-methylpyrrolidone extraction according to claim 1, wherein the number of heat exchange tubes (7) is not less than 6.

7. The gas recovery device for extracting N-methylpyrrolidone, according to claim 1, characterized in that a plurality of second heat exchange fins (9) are arranged on the outer wall of the separation hood (2) along the circumferential direction.