N-methyl pyrrolidone decompression purification equipment

Abstract

The utility model discloses N-methyl pyrrolidone decompression purification equipment which comprises a vacuum distillation tower, a supporting plate is fixedly connected to the lower side of the vacuum distillation tower, a discharging pipe is fixedly connected to the lower side of the vacuum distillation tower, a processing unit is arranged on the outer side of the vacuum distillation tower, the processing unit comprises a processing pipe, and the processing pipe is connected with the supporting plate. The treatment pipe is fixedly connected to the upper side of the vacuum distillation tower, the upper end of the treatment pipe is fixedly connected with a treatment box, the outer side of the treatment pipe is provided with a one-way valve, the inner side of the treatment box is fixedly connected with a fixing plate, the lower side of the fixing plate is fixedly connected with a cooling pipe, and the left side of the cooling pipe is fixedly connected with a water inlet pipe; the right side of the cooling pipe is fixedly connected with a water outlet pipe. And by arranging a treatment pipe, a treatment box, a cooling pipe, a rectangular hole and an activated carbon plate, produced waste gas can be conveniently treated and purified when N-methyl pyrrolidone is purified, and the waste gas is prevented from affecting the physical and psychological health of workers.

Description

Technical Field

[0001] The utility model relates to the field of N-methylpyrrolidone production, in particular to a device for decompressing and purifying N-methylpyrrolidone. Background Art

[0002] N-Methylpyrrolidone is an organic substance with the chemical formula C5H9NO. It is a colorless to light yellow transparent liquid with a slight ammonia smell. It is miscible with water in any proportion, soluble in ether, acetone, esters, halogenated hydrocarbons, aromatic hydrocarbons and other organic solvents, and is completely miscible with almost all solvents.

[0003] When purifying N-methylpyrrolidone, a vacuum distillation tower is required. During the distillation and purification process of N-methylpyrrolidone (NMP), waste gas containing NMP may be generated. Long-term contact or inhalation of high-concentration NMP waste gas may cause harm to the health of operators, including possible poisoning symptoms such as headache, nausea, vomiting, etc. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art that waste gas produced by N-methylpyrrolidone purification is directly discharged, which easily affects the physical and mental health of workers, one of the purposes of the utility model is to provide a N-methylpyrrolidone decompression purification device.

[0005] One of the purposes of the utility model is achieved by the following technical solution: a vacuum purification device for N-methylpyrrolidone, comprising a vacuum distillation tower: a support plate is fixedly connected to the lower side of the vacuum distillation tower, a discharge pipe is fixedly connected to the lower side of the vacuum distillation tower, and a processing unit is arranged on the outer side of the vacuum distillation tower;

[0006] The processing unit includes a processing pipe, which is fixedly connected to the upper side of the vacuum distillation tower. The upper end of the processing pipe is fixedly connected to a processing box, a one-way valve is arranged on the outer side of the processing pipe, a fixing plate is fixedly connected to the inner side of the processing box, a cooling pipe is fixedly connected to the lower side of the fixing plate, a water inlet pipe is fixedly connected to the left side of the cooling pipe, a water outlet pipe is fixedly connected to the right side of the cooling pipe, a rectangular hole is opened in the middle of the fixing plate, a fixing frame is fixedly connected to the upper side of the fixing plate, an activated carbon plate is fixedly connected to the inner side of the fixing frame, and an air outlet frame is fixedly connected to the left and right sides of the fixing frame and above the activated carbon plate.

[0007] According to the N-methylpyrrolidone decompression purification device, the outer side of the gas outlet frame passes through the outer side of the processing box.

[0008] According to the N-methylpyrrolidone vacuum purification equipment, the cooling pipe is arranged in a serpentine structure.

[0009] According to the N-methylpyrrolidone decompression purification equipment, the outer end of the water outlet pipe and the outer end of the water inlet pipe pass through the outside of the processing box.

[0010] According to the N-methylpyrrolidone decompression purification equipment, a drain pipe is fixedly connected to the right side of the treatment box to facilitate the discharge of the produced solution.

[0011] According to the N-methylpyrrolidone decompression purification equipment, a valve is arranged on the outside of the drain pipe to facilitate the control of liquid discharge.

[0012] Beneficial effects:

[0013] By arranging the processing tube, processing box, cooling tube, rectangular hole and activated carbon plate, the waste gas produced when N-methylpyrrolidone is purified can be processed and purified to avoid the waste gas affecting the physical and mental health of the staff.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is an overall three-dimensional structural diagram of a vacuum purification device for N-methylpyrrolidone according to the utility model;

[0017] Figure 2 This is a three-dimensional internal structure diagram of a processing unit in a N-methylpyrrolidone decompression purification device of the utility model;

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0019] Legend:

[0020] 1. Vacuum distillation tower; 2. Support plate; 3. Discharge pipe; 4. Processing unit; 401. Processing pipe; 402. One-way valve; 403. Processing box; 404. Drain pipe; 405. Valve; 406. Fixed plate; 407. Cooling pipe; 408. Water outlet pipe; 409. Water inlet pipe; 410. Rectangular hole; 411. Fixed frame; 412. Activated carbon plate; 413. Air outlet frame. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0022] Reference Figure 1-3 A vacuum purification device for N-methylpyrrolidone includes a vacuum distillation tower 1: a support plate 2 is fixedly connected to the lower side of the vacuum distillation tower 1, a discharge pipe 3 is fixedly connected to the lower side of the vacuum distillation tower 1, and a processing unit 4 is arranged on the outer side of the vacuum distillation tower 1, and the processing unit 4 is convenient for processing the discharged waste gas.

[0023] The processing unit 4 includes a processing tube 401, which is fixedly connected to the upper side of the vacuum distillation tower 1. A processing box 403 is fixedly connected to the upper end of the processing tube 401. A one-way valve 402 is arranged on the outer side of the processing tube 401. A fixing plate 406 is fixedly connected to the inner side of the processing box 403. A cooling tube 407 is fixedly connected to the lower side of the fixing plate 406. A water inlet pipe 409 is fixedly connected to the left side of the cooling tube 407. A water outlet pipe 408 is fixedly connected to the right side of the cooling tube 407. A rectangular hole 410 is opened in the middle of the fixing plate 406. A fixing frame 411 is fixedly connected to the upper side of the fixing plate 406. An activated carbon plate 412 is fixedly connected to the inner side of the fixing frame 411. An air outlet frame 413 is fixedly connected to the left and right sides of the fixing frame 411 and located above the activated carbon plate 412. The outer side of the air outlet frame 413 passes through the On the outside, the cooling pipe 407 is arranged in a serpentine structure, the outer end of the outlet pipe 408 and the outer end of the inlet pipe 409 pass through the outside of the treatment box 403, and the right side of the treatment box 403 is fixedly connected with a drain pipe 404, and a valve 405 is arranged on the outside of the drain pipe 404. When in use, the NMP waste gas enters the treatment box 403 through the treatment pipe 401, and at the same time, the cooling is passed into the cooling pipe 407 through the inlet pipe 409, so that the high-temperature NMP waste gas is condensed, and part of the NMP waste gas enters the fixed frame 411 through the rectangular hole 410, and is absorbed by the activated carbon plate 412, and finally the waste gas is discharged through the outlet frame 413, so as to facilitate the treatment and purification of the generated NMP waste gas to avoid affecting the physical and mental health of the staff, and the condensed liquid falls into the treatment box 403, and then the drain pipe 404 discharges the liquid.

[0024] Working principle: When in use, the vacuum distillation tower 1 is convenient for purifying N-methylpyrrolidone, and through the treatment pipe 401, it is convenient for NMP waste gas to enter the treatment box 403, and at the same time, cold water is introduced into the cooling pipe 407 to facilitate condensation of the waste gas, and the waste gas enters the fixed frame 411 through the rectangular hole 410, and the waste gas is treated by the activated carbon plate 412, and finally the gas is discharged through the air outlet frame 413, which is convenient for the treatment of the waste gas and avoids affecting the physical and mental health of the staff.

[0025] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A vacuum purification device for N-methylpyrrolidone, characterized in that: It comprises a vacuum distillation tower (1): a support plate (2) is fixedly connected to the lower side of the vacuum distillation tower (1), a discharge pipe (3) is fixedly connected to the lower side of the vacuum distillation tower (1), and a processing unit (4) is arranged on the outer side of the vacuum distillation tower (1); The processing unit (4) comprises a processing pipe (401), wherein the processing pipe (401) is fixedly connected to the upper side of the vacuum distillation tower (1), the upper end of the processing pipe (401) is fixedly connected to a processing box (403), a one-way valve (402) is arranged on the outer side of the processing pipe (401), a fixing plate (406) is fixedly connected to the inner side of the processing box (403), a cooling pipe (407) is fixedly connected to the lower side of the fixing plate (406), and the left side of the cooling pipe (407) is fixedly connected to the cooling pipe (407). A water inlet pipe (409) is fixedly connected, a water outlet pipe (408) is fixedly connected to the right side of the cooling pipe (407), a rectangular hole (410) is opened in the middle of the fixing plate (406), a fixing frame (411) is fixedly connected to the upper side of the fixing plate (406), an activated carbon plate (412) is fixedly connected to the inner side of the fixing frame (411), and an air outlet frame (413) is fixedly connected to the left and right sides of the fixing frame (411) and located above the activated carbon plate (412).

2. A N-methylpyrrolidone vacuum purification device according to claim 1, characterized in that: The outer side of the air outlet frame (413) passes through the outer side of the processing box (403).

3. A N-methylpyrrolidone vacuum purification device according to claim 1, characterized in that: The cooling pipe (407) is arranged in a serpentine structure.

4. A vacuum purification device for N-methylpyrrolidone according to claim 1, characterized in that: The outer end of the water outlet pipe (408) and the outer end of the water inlet pipe (409) pass through the outside of the treatment box (403).

5. A vacuum purification device for N-methylpyrrolidone according to claim 1, characterized in that: The right side of the processing box (403) is fixedly connected with a drainage pipe (404).

6. A vacuum purification device for N-methylpyrrolidone according to claim 5, characterized in that: A valve (405) is provided on the outer side of the drainage pipe (404).

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