CN210584302U

CN210584302U - NMP recovery plant

Info

Publication number: CN210584302U
Application number: CN201921367591.0U
Authority: CN
Inventors: 万淑蓉
Original assignee: Dongguan Haoli Refrigeration Equipment Co ltd
Current assignee: Dongguan Haoli Refrigeration Equipment Co ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-05-22
Anticipated expiration: 2029-08-22

Abstract

The utility model relates to a NMP recovery plant, NMP recovery plant includes by the casing and sets up heating device, fan, first cooler, second cooler and the third cooler that the inside heated tube of casing constitutes, the casing with the heated tube combination forms an enclosure space, including first heating space and second heating space, the heated tube is linked together with the external world, the heated tube passes through the fan with first cooler is linked together, first cooler and second cooler with first heating space is linked together, second cooler and third cooler with second heating space is linked together. According to the utility model provides a pair of NMP recovery plant adopts the recovery mode of cubic condensation and twice utilization high temperature gas waste heat, has effectively utilized high temperature gas's physics waste heat, reduces the energy consumption, and reduction in production cost improves recovery efficiency, and the pollution abatement.

Description

NMP recovery plant

Technical Field

The utility model relates to an industrial waste gas retrieves technical field, more specifically relates to a NMP recovery plant.

Background

Lithium ion batteries have the advantages of high voltage, high specific energy, many recycling times, long storage time and the like, are widely applied to portable electronic equipment such as mobile phones, digital cameras and portable computers, and are also widely applied to large and medium-sized electric equipment such as electric automobiles, electric bicycles, electric tools and the like, so that the performance requirement on lithium ion batteries is higher and higher.

The electrode coating machine is key equipment for producing the lithium battery electrode, mainly comprises a coating part and an oven part, and the oven part needs to consume a large amount of heat energy due to air heating. The coating part is used for coating prepared pasty insulating slurry dissolved by NMP as a solvent on an electrode base material (copper foil or aluminum foil) according to requirements, then a heater of an oven part is used for heating ambient temperature air to 120 ℃ to dry the slurry solvent NMP coated on the electrode base material, the remaining solid organic polymer forms a firm high insulating layer on the electrode base material to be used for manufacturing a lithium battery electrode, and waste gas containing gaseous NMP is treated by an NMP recycling machine and then is discharged in an organized manner.

NMP is an important raw material in the production process of lithium ion batteries, and is a carrier used as a raw material in the production process of lithium ion batteries, and is added into slurry as a raw material before production, and is evaporated at high temperature and directly discharged into the atmosphere during production. Because NMP is expensive and occupies a large cost for the production of the lithium battery electrode, the methyl pyrrolidone in the waste gas can be recovered and then purified by vacuum pressure reduction, so that the purposes of recycling and reducing the production cost are achieved.

The existing NMP recycling machine is mainly divided into three types: wheel, chilled, and chilled + spray. However, the three forms of NMP reclaimers have the phenomena of low NMP recovery rate, low concentration of the recovered NMP solvent and low energy-saving efficiency, and cannot meet the social development demand.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve the problem among the prior art and provide, its aim at provides a NMP recovery plant to reach the purpose of effectively retrieving gaseous methyl pyrrolidone, reduction in production cost and reduction to the pollution of air.

In order to achieve the purpose, the utility model provides an NMP recovery device, which comprises a heating device, a fan and a cooler, wherein the heating device comprises a shell and a heating pipeline arranged inside the shell, the shell and the heating pipeline are combined to form a closed space, the heating pipeline is communicated with the outside, and the closed space comprises a first heating space and a second heating space which are mutually independent; the coolers include a first cooler, a second cooler, and a third cooler; the heating pipeline is communicated with the input end of the first cooler through the fan; the output end of the first cooler and the input end of the second cooler are connected with the shell through pipelines and communicated with the first heating space; the output end of the second cooler and the input end of the third cooler are connected with the shell through pipelines and communicated with the second heating space.

Preferably, the heating pipes are arranged in parallel inside the housing.

Preferably, NMP recovery plant still includes the return air inlet, heating tube's a port with the fan links to each other, another port with the return air inlet links to each other, the return air inlet be used for to heat the pipeline in let in gas.

Preferably, the first, second and third coolers are arranged in sequence, and the heating means is arranged above the first, second and third coolers.

Preferably, the NMP recovery apparatus further comprises an air outlet, and the air outlet is connected with the output end of the third cooler and used for exhausting gas.

Preferably, the NMP recovery apparatus further comprises a liquid storage tank, wherein the liquid storage tank is respectively connected with the first cooler, the second cooler and the third cooler and is used for collecting liquid obtained by condensation of the first cooler, the second cooler and the third cooler.

Preferably, the liquid storage tank is arranged below the first, second and third coolers.

Preferably, the NMP recovery apparatus further comprises an electric cabinet for supplying power to the NMP recovery apparatus.

Preferably, the electric cabinet is disposed below the first, second and third coolers.

Preferably, NMP recovery plant still includes the frame, the frame includes upper portion platform face and middle part cavity, first, two and three coolers arrange in proper order on the upper portion platform face, the liquid reserve tank with the electric cabinet is arranged side by side in the middle part cavity.

Preferably, the heating pipeline is a stainless steel pipe.

The utility model provides a NMP recovery plant sends high temperature gas methyl pyrrolidone into the heating pipeline, sends into the cooler through the fan, and after the gas after the cooling of primary condensation lets in first heating space and heats, carries out secondary condensation, and after the gas after the cooling of secondary condensation lets in second heating space and heats, carries out the cubic condensation, and the gas of cooling that gets into in first heating space and second heating space absorbs the heat at the high temperature gas inside the heating pipeline, realizes heating and intensifies; the recovery mode of triple condensation and twice utilization of the high-temperature gas waste heat is adopted, the physical waste heat of the high-temperature gas is effectively utilized, the energy consumption is reduced, the production cost is reduced, the recovery efficiency is improved, and the pollution is reduced.

Drawings

Fig. 1 is a front view of an NMP recovery apparatus provided by the present invention.

Fig. 2 is a top view of the NMP recovery apparatus provided by the present invention.

Fig. 3 is a rear view of an NMP recovery apparatus according to the present invention.

Fig. 4 is a left side view of the NMP recovery apparatus provided by the present invention.

Fig. 5 is a right side view of an NMP recovery apparatus provided by the present invention.

Fig. 6 is a bottom view of the NMP recovery apparatus provided by the present invention.

Description of the reference numerals

1 heating device 11 casing

12 heating conduit 13 first heating space

14 cooler for second heating space 2

21 first cooler 22 second cooler

23 third cooler 3 fan

4 pipe 5 return air inlet

6 air outlet 7 liquid storage tank

8 electric cabinet 9 frame

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the embodiments of the present invention, if detailed description of related well-known elements or functions hinders the gist of the present invention, detailed description thereof will be omitted.

Referring to fig. 1 to 6, the NMP recycling apparatus provided by the present invention includes a heating device 1, a fan 3 and a cooler 2, the heating device 1 includes a housing 11 and a heating pipeline 12 disposed inside the housing 11, the housing 11 and the heating pipeline 12 are combined to form an enclosed space, the heating pipeline 12 is communicated with the outside, the enclosed space includes two mutually independent small enclosed spaces, one of the small enclosed spaces is a first heating space 13, and the other small enclosed space is a second heating space 14; the cooler 2 includes a first cooler 21, a second cooler 22, and a third cooler 23; the heating pipeline 12 is communicated with the input end of the first cooler 21 through the fan 3; the output end of the first cooler 21 and the input end of the second cooler 22 are connected with the shell 11 through a pipeline 4 and communicated with the first heating space 13; the output end of the second cooler 22 and the input end of the third cooler 23 are connected to the housing 11 through a pipe 4, and are communicated with the second heating space 14.

The heating pipes 12 are arranged in parallel inside the housing 11.

NMP recovery plant still includes return air inlet 5, heating tube 12 one end mouth with fan 3 links to each other, another port with return air inlet 5 links to each other, return air inlet 5 be used for to let in gas in heating tube 12.

The first, second and

third coolers

21, 22 and 23 are sequentially disposed, and the heating device 1 is disposed above the first, second and

third coolers

21, 22 and 23.

NMP recovery plant still includes air outlet 6, air outlet 6 pass through pipeline 4 with the output of third cooler 23 links to each other for the discharge gas.

The NMP recovery equipment further comprises a liquid storage tank 7, wherein the liquid storage tank 7 is respectively connected with the first cooler 21, the second cooler 22 and the third cooler 23 and is used for collecting liquid obtained by condensing the first cooler 21, the second cooler 22 and the third cooler 23.

The reservoir 7 is arranged below the first, second and

third coolers

21, 22 and 23.

The NMP recovery equipment further comprises an electric cabinet 8 for supplying power to the NMP recovery equipment.

The electric cabinet 8 is disposed below the first, second and

third coolers

21, 22 and 23.

NMP recovery plant still includes frame 9, frame 9 includes upper portion platform face and middle part cavity, first, two and three

coolers

21, 22 and 23 arrange in proper order on the upper portion platform face, liquid reserve tank 7 with electric cabinet 8 arranges side by side in the cavity of middle part.

The heating pipeline 12 is a stainless steel pipe.

Hereinafter, a method of using the NMP recovery apparatus according to the present invention will be described.

Referring to fig. 1 and 3, high-temperature gas methyl pyrrolidone enters a heating pipeline 12 through a return air inlet 5, is sent into a first cooler 21 through a fan 3, passes through the first cooler 21, part of gas is condensed into liquid and enters a liquid storage tank 7, the rest gas subjected to primary condensation and temperature reduction enters a first heating space 13 through a pipeline 4 communicated with the first cooler 21, and the part of gas absorbs heat of the high-temperature gas in the heating pipeline 12, so that primary heating is realized; the gas which is heated for the first time enters the second cooler 22 through the pipeline 4 communicated with the input end of the second cooler 22 for second condensation, part of the gas is condensed into liquid to enter the liquid storage tank 7, the rest of the gas which is cooled by the second condensation enters the second heating space 14 through the pipeline 4 communicated with the output end of the second cooler 22, and the part of the gas absorbs the heat of the high-temperature gas in the heating pipeline 12 to realize second heating; gas after secondary heating enters the third cooler 23 through the pipeline 4 communicated with the input end of the third cooler 23, third condensation is carried out, part of gas is condensed into liquid to enter the liquid storage tank 7, and the rest gas after tertiary condensation and temperature reduction is discharged through the air outlet 6. The utility model provides a pair of NMP recovery plant mainly is applicable to the methyl pyrrolidone's that produces after the coating machine coating in the battery production recovery, adopts the recovery mode of cubic condensation and twice utilization high temperature gas waste heat, has effectively utilized high temperature gas's physics waste heat, reduces the energy consumption, and reduction in production cost improves recovery efficiency, and the rate of recovery can reach 98%, and concentration can reach 90%, reduces the pollution to the air.

The preferred embodiments of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiments, and can be implemented in various forms. The embodiments disclosed in this specification are intended only to complete the disclosure of the present invention so that those skilled in the art can fully understand the scope of the present invention. The protection scope of the present invention should be subject to the content of the claims.

Claims

1. An NMP recovery apparatus, comprising:

a heating device, a fan and a cooler;

the method is characterized in that:

the heating device comprises a shell and a heating pipeline arranged in the shell, the shell and the heating pipeline are combined to form a closed space, the heating pipeline is communicated with the outside, and the closed space comprises a first heating space and a second heating space which are mutually independent;

the coolers include a first cooler, a second cooler, and a third cooler;

the heating pipeline is communicated with the input end of the first cooler through the fan; the output end of the first cooler and the input end of the second cooler are connected with the shell through pipelines and communicated with the first heating space; the output end of the second cooler and the input end of the third cooler are connected with the shell through pipelines and communicated with the second heating space.

2. The NMP recovery apparatus according to claim 1, wherein the heating pipes are arranged in parallel inside the housing.

3. The NMP recycling apparatus according to claim 1 or 2, further comprising a return air inlet, wherein one end of the heating pipe is connected to the blower, and the other end of the heating pipe is connected to the return air inlet, and the return air inlet is used for introducing gas into the heating pipe.

4. An NMP recovering apparatus in accordance with claim 1, wherein said first, second and third coolers are provided in this order, and said heating means is disposed above said first, second and third coolers.

5. The NMP recycling apparatus according to claim 1 or 4, further comprising an air outlet connected to an output of said third cooler for exhausting air.

6. An NMP recovery apparatus according to claim 1, 2 or 4, further comprising a tank connected to the first, second and third coolers for collecting the liquid condensed by the first, second and third coolers.

7. An NMP recovery apparatus in accordance with claim 6, wherein the reservoir is disposed below the first, second and third coolers.

8. The NMP recycling apparatus according to claim 6, further comprising an electric control box for supplying power to the NMP recycling apparatus.

9. The NMP recycling apparatus according to claim 8, wherein said electric cabinet is disposed below said first, second and third coolers.

10. The NMP recovery apparatus according to claim 8 or 9, further comprising a frame including an upper platform surface and a central cavity, said first, second and third coolers being arranged in sequence on said upper platform surface, said reservoir and said electrical cabinet being arranged side by side in said central cavity.