CN111013307A

CN111013307A - NMP exhaust treatment device

Info

Publication number: CN111013307A
Application number: CN201910252154.2A
Authority: CN
Inventors: 黄春锦; 刘甫先; 周伟
Original assignee: Ganzhou Zhongneng Industrial Co ltd
Current assignee: Ganzhou Zhongneng Industrial Co ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-04-17

Abstract

The invention discloses an NMP waste gas treatment device, relates to the technical field of NMP, and mainly aims to solve the problem that the conventional NMP waste gas treatment device is low in efficiency; this NMP exhaust treatment device, including air inlet, first reactor, first pipe, second reactor, NMP absorption unit, first condensation chamber and third reactor, first reactor is connected with the second reactor through first pipe and second pipe, second reactor top is equipped with the motor, the motor passes through the connecting rod and is connected with the flabellum, the inside NMP absorption unit that still is equipped with of second pipe, be equipped with first condensation chamber on the third pipe, the third pipe still communicates with the third reactor, third reactor top still is connected with the second reactor through the fifth pipe, be equipped with the second condensation chamber in the third reactor, the third pipe is connected with the spiral pipe, has improved the treatment effeciency of NMP waste gas.

Description

NMP exhaust treatment device

Technical Field

The invention relates to environment-friendly equipment, in particular to an NMP waste gas treatment device.

Background

N-methylpyrrolidone, a chinese alias: NMP is colorless transparent oily liquid, has little amine smell, low volatility, good thermal stability and chemical stability, can volatilize along with water vapor, has hygroscopicity and is sensitive to light. It is easily soluble in water, ethanol, diethyl ether, acetone, ethyl acetate, chloroform and benzene, and can dissolve most organic and inorganic compounds, polar gas, natural and synthetic high molecular compounds. N-methyl pyrrolidone is widely applied to the industries of lithium batteries, medicines, pesticides, pigments, cleaning agents, insulating materials and the like.

NMP waste gas is discharged into the air when the emission standard is not met, so that the environment is greatly damaged, the treatment efficiency of the conventional NMP waste gas treatment device is low, the concentration of NMP cannot be well reduced, and a large amount of resources are wasted, so that the efficient NMP waste gas treatment device is needed.

Disclosure of Invention

The invention aims to provide an NMP waste gas treatment device, which solves the problem of low efficiency of the conventional NMP waste gas treatment device.

In order to achieve the purpose, the invention provides the following technical scheme:

an NMP waste gas treatment device comprises an air inlet, a first reactor, a first conduit, a second reactor, a motor, fan blades, an NMP absorption unit, a third conduit, a first condensation chamber, a water tank and a third reactor, wherein activated carbon particles are placed at the bottom of the first reactor, the first reactor is connected with the second reactor through the first conduit and the second conduit, the motor is arranged at the top of the second reactor, the motor is connected with the fan blades through a connecting rod, the NMP absorption unit is further arranged inside the second conduit, the first condensation chamber is arranged on the third conduit, a feed inlet is formed above the first condensation chamber, the third conduit is communicated with the third reactor, the third reactor is further connected with the second reactor through a fifth conduit, an air outlet is further formed in the third reactor, and a second valve is arranged on the air outlet, and a second condensation chamber is arranged in the third reactor, the third conduit is connected with a spiral pipe, and the spiral pipe is positioned in the second condensation chamber.

On the basis of the technical scheme, the invention also provides the following optional technical scheme:

in one alternative: an ultraviolet germicidal lamp is also arranged in the first reactor.

In one alternative: the first guide pipe is positioned above the second guide pipe, and one-way flow valves are arranged in the first guide pipe and the second guide pipe.

In one alternative: NMP waste gas in the first reactor enters the second reactor through the first guide pipe, and NMP waste gas in the second reactor enters the first reactor through the second guide pipe.

In one alternative: the third conduit is also connected with a fourth conduit, and the fourth conduit is connected with a water tank below.

In one alternative: and water in the third conduit enters the water tank through a fourth conduit.

In one alternative: the fifth guide pipe is also provided with a first valve and is also connected with an air extractor.

In one alternative: a concentration display is arranged above the third reactor.

Compared with the prior art, the invention has the following beneficial effects:

1. through the arrangement of the activated carbon particles and the ultraviolet germicidal lamp, bacteria and impurities in NMP waste gas can be removed, and the environment is prevented from being damaged;

2. by arranging the motor and the fan blades, the circulation speed of gas in the second reactor can be increased, and the working efficiency is improved;

3. through setting up first condensing chamber and second condensing chamber, can improve the effect of condensation.

Drawings

Fig. 1 is a schematic structural view of an NMP exhaust gas treatment device.

FIG. 2 is a schematic structural diagram of another embodiment of an NMP exhaust treatment device.

Notations for reference numerals: 1-air inlet, 2-first reactor, 3-ultraviolet germicidal lamp, 4-activated carbon particles, 5-first conduit, 6-one-way flow valve, 7-second conduit, 8-second reactor, 9-motor, 10-connecting rod, 11-fan blade, 12-NMP absorption unit, 13-third conduit, 14-first condensation chamber, 15-feed inlet, 16-fourth conduit, 17-water tank, 18-third reactor, 19-concentration display, 20-fifth conduit, 21-first valve, 22-air extractor, 23-air outlet, 24-second valve, 25-second condensation chamber, 26-spiral pipe.

Detailed Description

The present invention will be described in detail with reference to the following embodiments, wherein like or similar elements are designated by like reference numerals throughout the several views, and wherein the shape, thickness or height of the various elements may be expanded or reduced in practice. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention. Any obvious modifications or variations can be made to the present invention without departing from the spirit or scope of the present invention.

Example 1

Referring to fig. 1, in an embodiment of the present invention, an NMP waste gas treatment apparatus includes a gas inlet 1, a first reactor 2, a first conduit 5, a second conduit 7, a second reactor 8, a motor 9, fan blades 11, an NMP absorption unit 12, a third conduit 13, a first condensation chamber 14, a water tank 17, and a third reactor 18, where the gas inlet 1 is located below one side of the first reactor 2, activated carbon particles 4 are placed at the bottom of the first reactor 2, the activated carbon particles 4 can absorb bacteria and impurities in NMP waste gas, improve cleanliness of NMP waste gas, and prevent bacteria in NMP waste gas from damaging the environment, an ultraviolet germicidal lamp 3 is further disposed in the first reactor 2, the ultraviolet germicidal lamp 3 can further eliminate bacteria in NMP waste gas, further reduce bacteria in NMP gas, the first reactor 2 is connected to the second reactor 8 through the first conduit 5 and the second conduit 7, first pipe 5 is located the top of second pipe 7, all be equipped with one-way flow valve 6 in first pipe 5 and the second pipe 7, NMP waste gas in the first reactor 2 gets into in the second reactor 8 through first pipe 5, NMP waste gas in the second reactor 8 gets into in the first reactor 2 through second pipe 7, and NMP waste gas in first reactor 2 and the second reactor 8 can't reverse circulation, second reactor 8 top is equipped with motor 9, motor 9 is connected with flabellum 11 through connecting rod 10, opens motor 9, drives flabellum 11 through connecting rod 10 and rotates, can accelerate the circulation speed of inside NMP waste gas, improves the treatment effeciency, NMP absorption unit 12 still is equipped with in the second pipe 7, NMP absorption unit 12 is used for absorbing waste gas, reduces the content of NMP waste gas, after NMP waste gas passes through NMP absorption unit 12, one portion enters the first reactor 2 through the second conduit 7 to be subjected to the sterilization step again, and the other portion enters the third conduit 13.

The third conduit 13 is fixed below one side of the second reactor 8, the third conduit 13 is provided with a first condensation chamber 14, a feed inlet 15 is arranged above the first condensation chamber 14, a condensing agent is added into the first condensation chamber 14 through the feed inlet 15, gas-liquid separation is realized, water contained in NMP waste gas can be removed, the third conduit 13 is further connected with a fourth conduit 16, the fourth conduit 16 is connected with a water tank 17 below, water in the third conduit 13 enters the water tank 17 through the fourth conduit 16 for collecting condensed water, the third conduit 13 is further communicated with a third reactor 18, a concentration display 19 is arranged above the third reactor 18, the concentration display 19 is used for displaying the concentration of NMP gas in the third reactor 18, when the concentration of NMP is higher than a discharge standard, the NMP gas cannot be directly discharged into the air, the third reactor 18 is further connected with the second reactor 8 through a fifth conduit 20, still be equipped with first valve 21 on the fifth pipe 20, when concentration was too high, open first valve 21, let in the NMP waste gas in the third reactor 18 in the second reactor 8 once more, further reduce the concentration of NMP, until meeting the demands, fifth pipe 20 still is connected with air aspirator 22, air aspirator 22 is used for making things convenient for the NMP waste gas in the third reactor 18 to get into in the second reactor 8, still be equipped with gas outlet 23 on the third reactor 18, gas outlet 23 is used for discharging up to standard NMP waste gas, be equipped with second valve 24 on the gas outlet 23.

Example 2

Referring to fig. 2, the embodiment of the present invention is different from embodiment 1 in that a second condensation chamber 25 is disposed in the third reactor 18, a condensing agent is disposed in the second condensation chamber 25, the third conduit 13 is connected to a spiral pipe 26, the second condensation chamber 25 is used for secondary condensation, and the spiral pipe 26 is disposed in the second condensation chamber 25, so as to increase the residence time of the NMP waste gas and improve the condensation effect.

The working principle of the invention is as follows: NMP waste gas enters a first reactor 2 through a gas inlet 1, is sterilized and purified through activated carbon particles 4 and an ultraviolet germicidal lamp 3 in the first reactor 2, then enters a second reactor 8 through a first guide pipe 5, the NMP concentration is reduced through an NMP absorption unit 12, a part of the NMP waste gas enters the first reactor 2 through a second guide pipe 7 and is sterilized and purified, the other part of the NMP waste gas enters a third guide pipe 13, enters a spiral pipe 26 in a third reactor 18 after being condensed in a first condensation chamber 14 for secondary condensation, when the NMP waste gas in the third reactor 18 does not reach the emission standard, a first valve 21 is opened, the NMP waste gas enters the second reactor 8 through a fifth guide pipe 20 and is continuously reduced until the NMP concentration reaches the emission standard, and finally the NMP waste gas is discharged from a gas outlet 23.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. An NMP waste gas treatment device comprises a gas inlet (1), a first reactor (2), a first conduit (5), a second conduit (7), a second reactor (8), a motor (9), fan blades (11), an NMP absorption unit (12), a third conduit (13), a first condensation chamber (14), a water tank (17) and a third reactor (18), and is characterized in that activated carbon particles (4) are placed at the bottom of the first reactor (2), the first reactor (2) is connected with the second reactor (8) through the first conduit (5) and the second conduit (7), the top of the second reactor (8) is provided with the motor (9), the motor (9) is connected with the fan blades (11) through a connecting rod (10), the second conduit (7) is also internally provided with the NMP absorption unit (12), the third conduit (13) is provided with the first condensation chamber (14), first condensation chamber (14) top is equipped with charge door (15), third pipe (13) still communicate with third reactor (18), third reactor (18) top is still connected with second reactor (8) through fifth pipe (20), still be equipped with gas outlet (23) on third reactor (18), be equipped with second valve (24) on gas outlet (23), be equipped with second condensation chamber (25) in third reactor (18), third pipe (13) are connected with spiral pipe (26), spiral pipe (26) are located inside second condensation chamber (25).

2. The NMP exhaust treatment device according to claim 1, wherein an ultraviolet germicidal lamp (3) is further provided in the first reactor (2).

3. The NMP exhaust treatment device according to claim 2, wherein the first conduit (5) is located above the second conduit (7), and wherein a one-way flow valve (6) is provided in each of the first conduit (5) and the second conduit (7).

4. The NMP off-gas treatment apparatus according to claim 3, wherein the NMP off-gas in the first reactor (2) enters the second reactor (8) through the first conduit (5), and the NMP off-gas in the second reactor (8) enters the first reactor (2) through the second conduit (7).

5. NMP exhaust treatment device according to claim 4, characterised in that the third conduit (13) is further connected to a fourth conduit (16), the fourth conduit (16) being connected to a lower water tank (17).

6. An NMP exhaust treatment device according to claim 5, wherein the water in the third conduit (13) enters the water tank (17) through a fourth conduit (16).

7. The NMP exhaust treatment device according to claim 6, wherein the fifth conduit (20) is further provided with a first valve (21), and the fifth conduit (20) is further connected to an air pump (22).

8. An NMP exhaust gas treatment apparatus according to any one of claims 1 to 7, wherein a concentration indicator (19) is provided above the third reactor (18).