CN213739027U

CN213739027U - Methyl Pyrrolidone (NMP) waste liquid recycle device

Info

Publication number: CN213739027U
Application number: CN202021535986.XU
Authority: CN
Inventors: 王建波
Original assignee: Luoyang Youhui Environmental Protection Equipment Co ltd
Current assignee: Luoyang Youhui Environmental Protection Equipment Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-07-20
Anticipated expiration: 2030-07-27

Abstract

The utility model provides a methyl pyrrolidone (NMP) waste liquid regeneration utilizes device, by the homogeneity gunbarrel, precision filter, the heater, film evaporator, cooler A, clean material jar, cooler B, the waste water jar, vacuum system, the pipeline, the centrifugal pump, the cooling water is advanced, is gone out and is constituteed. The working principle of the device is mainly that different distillation ranges of all components in a methyl pyrrolidone waste liquid mixture are utilized, the vacuum film evaporator is adopted to regenerate the methyl pyrrolidone waste liquid, the methyl pyrrolidone is purified from the mixture for reuse through condensation after reduced pressure heating distillation, other materials are removed in the main process, the treatment process is a low-temperature distillation process, the physical process is adopted, and the original quality and the organization structure of the methyl pyrrolidone cannot be damaged.

Description

Methyl Pyrrolidone (NMP) waste liquid recycle device

Technical Field

The utility model belongs to the technical field of energy-concerving and environment-protective useless solvent treatment, concretely relates to methyl pyrrolidone (NMP) waste liquid recycle device.

Background

Methylpyrrolidone, alternative name: NMP; 1-methyl-2-pyrrolidone; n-methyl-2-pyrrolidone. Colorless transparent oily liquid, slightly having amine odor. Low volatility, good thermal stability and chemical stability, and can be volatilized with water vapor. It has hygroscopic property. 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.

1. Methyl pyrrolidone is an excellent high-grade solvent, a polar solvent with strong selectivity and good stability, a high-precision electron, a circuit board, a lithium battery and the like, and a cleaning agent: the high-grade paint, ink and pigment, such as deoiling, degreasing, dewaxing, polishing, rust prevention and paint removal, has the advantages of low toxicity, high boiling point, strong dissolving power, nonflammability, biodegradability, recyclability, safe use, suitability for various formula purposes and the like.

2. Methyl pyrrolidone property: 1. the characteristics are as follows: colorless transparent oily liquid, slightly having amine odor. 2. Density (g/mL, 25/25 ℃ C.): 1.02603. relative steam density (g/mL, air ═ 1): 3.44. melting Point (. degree. C.): -24.45. boiling point (. degree. C., atmospheric pressure): 2026. refractive index (25 ℃): 1.4688. viscosity (mPa · s): 1.659. flash point (. degree. C.): 8610. ignition point (. degree. C.): 34611. heat of evaporation (KJ/kg, b.p.): 439.512. heat of combustion (KJ/mol): 301013. critical temperature (. degree. C.): 4453. critical pressure (MPa): 4.7615. conductivity (S/m, 25 ℃ C.): (1-2). times.10-816. vapor pressure (kPa, 150 ℃ C.): 21.6017. vapor pressure (kPa, 100 ℃): 3.2018. vapor pressure (kPa, 78-79 ℃): 1.3319. vapor pressure (kPa, 60 ℃): 0.5320. solubility: 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.

At present, domestic waste methyl pyrrolidone is recycled, no special complete equipment is provided, and methyl pyrrolidone cannot be recycled. Causing huge waste and environmental pollution. The new device invented by my company can make up for this deficiency. The same applies to large amounts.

SUMMERY OF THE UTILITY MODEL

Firstly, the waste mixed solution of the methyl pyrrolidone to be distilled is connected to the upper end of the homogeneous precipitation tank 1 from the centrifugal pump P, and is connected to a pipeline L from the lower end of the homogeneous precipitation tank 1 by a flange, and is connected to a waste methyl pyrrolidone liquid inlet at one end of the precision filter 2 through the pipeline L.

After filtration, the other end of the fine filter 2 is connected to a heater 3 through a pipe L, where the methylpyrrolidone waste liquid is heated.

After being heated, the methyl pyrrolidone waste liquid passes through an outlet of the heater 3 and is connected with the inlet end of the methyl pyrrolidone waste liquid on the upper part of the thin film evaporator 4 through a pipeline L, and enters the thin film evaporator 4 to start flash evaporation and continuous evaporation.

At this time, the part (mainly moisture) with short carbon chains in the mixed methylpyrrolidone waste liquid is changed into a gaseous state, and the gaseous state is connected with the pipeline L from the upper end of the thin film evaporator 4 through a flange, is connected with the inlet end of the cooler B7 through the pipeline L, is cooled, and then enters the waste water tank 8 to be recovered.

And the part (pure liquid) with the carbon chain length keeps liquid flowing out from the bottom of the thin film evaporator 4, is connected with a pipeline L from the outlet of the thin film evaporator 4, is connected with a cooler A5 through the pipeline L, is cooled and enters the upper inlet end of the purified tank 6, and is recovered.

The vacuum system 9 provides vacuum assurance to the system because the entire system is operating under vacuum. The pipe L is connected to the vacuum outlet, and the pipe L is connected to the vacuum inlet of the cooler B7.

The cooling water inlet and outlet W are cooling water for externally supplying secondary cooling, and are connected to cooling water inlets of the coolers A5 and B7, and to cooling water outlets of the coolers A5 and B7.

Drawings

FIG. 1 is a flow chart of a new process for purifying and regenerating waste methylpyrrolidone liquid.

The device consists of a homogenizing precipitation tank 1, a precision filter 2, a heater 3, a thin film evaporator 4, a cooler A5, a material purifying tank 6, a cooler B7, a waste water tank 8, a vacuum system 9, a pipeline L, a centrifugal pump P and a cooling water inlet and outlet W.

FIG. 2 is a connection diagram of a new device for purifying and regenerating the waste liquid of the methyl pyrrolidone.

Detailed Description

The new equipment structure form of the regeneration and utilization of the methyl pyrrolidone waste liquid by adopting a vacuum film evaporator is as follows:

the working principle of the device is that the methyl pyrrolidone is purified from the mixture for reuse by utilizing different distillation ranges of all components in the methyl pyrrolidone waste liquid mixture and condensing after reduced pressure heating distillation. The main process is to remove other materials, the treatment process is a low-temperature distillation process, and the physical process is a physical process, so that the original quality and tissue structure of the methyl pyrrolidone cannot be damaged.

Because entire system moves under the vacuum, improves factor of safety greatly, and vacuum apparatus can take out the waste gas that produces in the regeneration process simultaneously, discharges up to standard after tail gas treatment, and the environmental protection operation does not have secondary pollution.

A device for recycling methyl pyrrolidone waste liquid (NMP) comprises a homogeneous precipitation tank 1, a precision filter 2, a heater 3, a thin film evaporator 4, a cooler A5, a material purifying tank 6, a cooler B7, a waste water tank 8, a vacuum system 9, a pipeline L, a centrifugal pump P and a cooling water inlet and outlet W.

The method is characterized in that: the centrifugal pump P is arranged at the front end of the homogeneous precipitation tank 1, and the outlet of the homogeneous precipitation tank 1 is connected with the left inlet of the precision filter 2 through the pipeline L.

The right outlet of the precision filter 2 is connected with the lower inlet of the heater 3.

The upper side of the heater 3 is connected with a pipeline L to form a right upper inlet of the thin film evaporator 4, and a lower outlet of the thin film evaporator 4 is connected with the upper rear part of the cooler A5.

The upper part of the thin film evaporator 4 is connected to the upper front part of the cooler B, and the upper rear part of the cooler B7 is connected to the upper part of the waste water tank 8.

The lower rear part of the cooler A5 is connected with an upper inlet of the purifying tank 6.

The stability of the vacuum system 9 is a prerequisite to ensure reliable operation of the whole system. Require equipment fixed stable, pipe connection stable, pressure stable, the distance is short as far as possible, comes material pipeline connected mode difference with other and lies in: the upper front part of the vacuum system 9 is connected with the lateral rear part of the cooler B7, so that the equipment is kept stable, and the pipeline connection is horizontal, vertical and orderly arranged.

The cooling water inlet and outlet W is connected to the lateral rear sides of the coolers A5 and B7 and to the lateral front sides of the coolers A5 and B7.

Claims

1. A methyl pyrrolidone (NMP) waste liquid regeneration utilizes device, characterized by: the device comprises a homogenizing precipitation tank (1), a precision filter (2), a heater (3), a thin film evaporator (4), a cooler A (5), a material purifying tank (6), a cooler B (7), a waste water tank (8), a vacuum system (9), a pipeline (L), a centrifugal pump (P) and a cooling water pipeline (W);

the centrifugal pump (P) is arranged at the front end of the homogenizing sedimentation tank (1), the outlet of the homogenizing sedimentation tank (1) and the pipeline (L) are connected with the left inlet of the precision filter (2), and the right outlet of the precision filter (2) is connected with the lower side inlet of the heater (3);

the upper side of the heater (3) is connected with a pipeline (L) to form an inlet at the upper right of the thin film evaporator (4), a lower outlet of the thin film evaporator (4) is connected with the upper rear part of the cooler A (5), the upper part of the thin film evaporator (4) is connected with the upper front part of the cooler B (7), and the upper rear part of the cooler B (7) is connected with the upper part of the waste water tank (8);

the upper front part of the vacuum system (9) is connected with the lateral rear part of the cooler B (7), and the lower rear part of the cooler A (5) is connected with the upper inlet of the material purifying tank (6).