Melt crystallization separation device for m-phenylenediamine purification

Abstract

The utility model relates to the technical field of chemical production, in particular to a melt crystallization separation device for m-phenylenediamine purification, which comprises a base, a tank body component and a sealing cover, the top of the base is provided with the tank body component through bolts, and the tank body component consists of an outer tank body, a hollow interlayer and an inner tank body; an inner tank body is arranged in the outer tank body in a sleeved mode, and a hollow interlayer is arranged between the outer tank body and the inner tank body. A sealing cover is clamped to the top of the tank assembly, a nitrogen input pipe and a nitrogen output pipe are arranged on the two sides of the top of the sealing cover respectively, a digital display thermometer and a pressure gauge are installed at the two ends of the top of the sealing cover through screws respectively, an inner cylinder is welded to the bottom of the sealing cover, and barbs are welded to the outer surface layer of the inner cylinder at equal intervals. The novel melt crystallization separation device for m-phenylenediamine purification can increase the adhesion force of crystals, is convenient to quickly realize separation, and is suitable for wide popularization and application.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to a melting crystallization separation device for purifying meta-phenylenediamine. Background Art

[0002] Metaphenylenediamine, also known as 1,3-phenylenediamine, abbreviated as MPD, is an organic compound with the chemical formula C6H8N2. It is white needle-shaped crystals at room temperature, soluble in ethanol, water, chloroform, acetone, dimethylamide, slightly soluble in ether and carbon tetrachloride, and difficult to dissolve in benzene, toluene, butanol. It is unstable in the air and easily turns light red. Metaphenylenediamine is widely used in the manufacture of disperse dyes, reactive dyes, direct dyes and cement accelerators. The purification of metaphenylenediamine requires the use of a crystallization separation device.

[0003] The existing crystallization separation device cannot increase the adhesion of the crystals and is not convenient for rapid separation. Therefore, a melt crystallization separation device for purifying metaphenylenediamine is proposed, which can increase the adhesion of the crystals and facilitate rapid separation. Utility Model Content

[0004] In view of the problems in the prior art, the utility model provides a melt crystallization separation device for purifying meta-phenylenediamine, which can increase the adhesion of crystals and facilitate rapid separation.

[0005] The technical solution adopted by the utility model to solve the technical problem is a melt crystallization separation device for purifying metaphenylenediamine, comprising a base, a tank assembly and a sealing cover, wherein the top of the base is provided with a tank assembly by bolts and the tank assembly is composed of an outer tank body, a hollow interlayer and an inner tank body, wherein the outer tank body is provided with an inner tank body and a hollow interlayer is provided between the outer tank body and the inner tank body;

[0006] A sealing cover is clamped on the top of the tank assembly, and a nitrogen input pipe and a nitrogen output pipe are respectively arranged on both sides of the top of the sealing cover. A digital thermometer and a pressure gauge are respectively installed on both ends of the top of the sealing cover by screws. An inner cylinder is welded to the bottom of the sealing cover, and barbs are welded on the outer layer of the inner cylinder at equal distances.

[0007] By adopting the above technical solution, the gas control valve on the nitrogen input pipe is opened to input nitrogen through the nitrogen input pipe. The nitrogen can reduce the temperature of the m-phenylenediamine solution in the inner tank, causing the solution to crystallize. The outer layer of the inner cylinder is welded with barbs at equal distances to increase the adhesion of the crystals, thereby facilitating rapid separation.

[0008] Specifically, a cleaning port is connected to one side of the bottom end of the outer tank body and the cleaning port is connected to the inner tank body, and a clamping cover is clamped on the cleaning port.

[0009] By adopting the above technical solution, the snap-on cover on the cleaning port is opened, so that the residual material in the inner tank can be cleaned and the inner tank can be backwashed to ensure the cleanliness of the inner wall of the inner tank.

[0010] Specifically, the other side of the bottom end of the outer tank body is connected to a discharge pipe, and the discharge pipe is connected to the hollow interlayer, and a heat preservation water control valve is arranged on the discharge pipe.

[0011] Specifically, the detection ends of the digital thermometer and the pressure gauge are both located in the inner tank body, one end of the pressure gauge is connected to a feed pipe, and the output port of the feed pipe is located in the inner tank body.

[0012] Specifically, the nitrogen input pipe and the nitrogen output pipe are both provided with gas control valves, and the nitrogen input pipe and the nitrogen output pipe are both connected to the inner tank body.

[0013] By adopting the above technical solution, the gas control valve on the nitrogen input pipe is opened to input nitrogen through the nitrogen input pipe, and the gas control valve on the nitrogen output pipe is opened to facilitate the discharge of the nitrogen after absorbing heat.

[0014] Beneficial effects of the utility model:

[0015] (1) The utility model discloses a melt crystallization separation device for purifying m-phenylenediamine. The worker opens the sealing cover and adds heat-insulating circulating water into the hollow interlayer to improve the heat-insulating effect of the outer tank. The worker closes the sealing cover and adds m-phenylenediamine solution into the inner tank through the feed pipe. The worker opens the gas control valve on the nitrogen inlet pipe and uses the nitrogen inlet pipe to input nitrogen. The nitrogen can reduce the temperature of the m-phenylenediamine solution in the inner tank and cause the solution to crystallize. The outer layer of the inner cylinder is welded with barbs at equal distances to increase the adhesion of the crystals, which is convenient for rapid separation.

[0016] (2) The utility model discloses a melt crystallization separation device for purifying m-phenylenediamine. The gas control valve on the nitrogen output pipe is opened to discharge the nitrogen after absorbing heat. The temperature value in the inner tank is displayed by a digital thermometer to facilitate personnel to know. The pressure value in the inner tank is displayed by a pressure gauge to facilitate personnel to know. The insulation water control valve is opened to discharge the insulation water after insulation use by using the discharge pipe, and the insulation water is recycled after cooling to save water resources. The snap-fit ​​cover on the cleaning port is opened to clean the residual material in the inner tank and backwash the inner tank to ensure the cleanliness of the inner tank wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2This is a schematic diagram of the internal structure of the tank assembly of the utility model;

[0020] Figure 3 It is a bottom view of the utility model;

[0021] In the figure: 1. tank body assembly; 101. outer tank body; 102. hollow interlayer; 103. inner tank body; 2. sealing cover; 3. nitrogen inlet pipe; 4. digital thermometer; 5. nitrogen outlet pipe; 6. pressure gauge; 7. feed pipe; 8. inner cylinder; 9. barb; 10. base; 11. insulation water control valve; 12. discharge pipe; 13. cleaning port; 14. snap-on cover. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] It can increase the strength of crystal adhesion and facilitate rapid separation, such as Figure 1-3 As shown, the melt crystallization separation device for purifying m-phenylenediamine described in the utility model comprises a base 10, a tank assembly 1 and a sealing cover 2, the top of the base 10 is installed with a tank assembly 1 by bolts, and the tank assembly 1 is composed of an outer tank body 101, a hollow interlayer 102 and an inner tank body 103, the outer tank body 101 is provided with an inner tank body 103, and a hollow interlayer 102 is provided between the outer tank body 101 and the inner tank body 103;

[0024] A sealing cover 2 is clamped on the top of the tank assembly 1, and a nitrogen input pipe 3 and a nitrogen output pipe 5 are respectively arranged on both sides of the top of the sealing cover 2. A digital thermometer 4 and a pressure gauge 6 are respectively installed on both ends of the top of the sealing cover 2 by screws. An inner tube 8 is welded to the bottom of the sealing cover 2, and barbs 9 are welded on the outer layer of the inner tube 8 at equal distances.

[0025] When in use, the gas control valve on the nitrogen input pipe 3 is opened to input nitrogen through the nitrogen input pipe 3. The nitrogen can reduce the temperature of the m-phenylenediamine solution in the inner tank body 103, causing the solution to crystallize. The outer layer of the inner cylinder 8 is welded with barbs 9 at equal distances to increase the adhesion of the crystals, thereby facilitating rapid separation.

[0026] In order to facilitate the cleaning of the inner tank 103, for example, Figure 1 As shown, the utility model further includes that a cleaning port 13 is connected to one side of the bottom end of the outer tank body 101 and the cleaning port 13 is connected to the inner tank body 103 , and a snap-on cover 14 is snap-on the cleaning port 13 .

[0027] When in use, the snap-fit ​​cover 14 on the cleaning port 13 is opened to clean the residual materials in the inner tank body 103 and backwash the inner tank body 103 to ensure the cleanliness of the inner wall of the inner tank body 103 .

[0028] For example, Figure 1 As shown, the utility model also includes that the other side of the bottom end of the outer tank body 101 is connected to a discharge pipe 12 and the discharge pipe 12 is connected to the hollow interlayer 102 , and the discharge pipe 12 is provided with a heat preservation water control valve 11 .

[0029] When in use, the insulation water control valve 11 is opened and the discharge pipe 12 is used to discharge the insulation water after insulation use, and the insulation water is recycled after cooling, thereby saving water resources.

[0030] For example, Figure 1 As shown, the utility model also includes that the detection ends of the digital thermometer 4 and the pressure gauge 6 are both located in the inner tank body 103 , one end of the pressure gauge 6 is connected to a feed pipe 7 and the output port of the feed pipe 7 is located in the inner tank body 103 .

[0031] When in use, the digital thermometer 4 is used to conveniently display the temperature value in the inner tank body 103 for personnel to know, and the pressure gauge 6 is used to conveniently display the pressure value in the inner tank body 103 for personnel to know.

[0032] For example, Figure 1 As shown, the utility model also includes that the nitrogen input pipe 3 and the nitrogen output pipe 5 are both provided with gas control valves, and the nitrogen input pipe 3 and the nitrogen output pipe 5 are both connected to the inner tank body 103.

[0033] When in use, the gas control valve on the nitrogen input pipe 3 is opened to input nitrogen through the nitrogen input pipe 3, and the gas control valve on the nitrogen output pipe 5 is opened to discharge the nitrogen after absorbing heat.

[0034] When the utility model is used, the staff opens the sealing cover 2 to add heat-insulating circulating water in the hollow interlayer 102 to improve the heat-insulating effect of the outer tank body 101, closes the sealing cover 2, adds the m-phenylenediamine solution into the inner tank body 103 through the feed pipe 7, opens the gas control valve on the nitrogen input pipe 3 to input nitrogen through the nitrogen input pipe 3, and the nitrogen can reduce the temperature of the m-phenylenediamine solution in the inner tank body 103, so that the solution crystallizes;

[0035] The outer surface of the inner tube 8 is welded with barbs 9 at equal distances to increase the strength of crystal adhesion, which is convenient for rapid separation. The gas control valve on the nitrogen output pipe 5 is opened to discharge the nitrogen after heat absorption. The digital thermometer 4 is used to display the temperature value in the inner tank body 103, which is convenient for personnel to know.

[0036] The pressure gauge 6 is used to display the pressure value in the inner tank body 103, which is convenient for personnel to know. The insulation water control valve 11 is opened to discharge the insulation water after insulation use through the discharge pipe 12, and then it is recycled after cooling to save water resources. The snap-fit ​​cover 14 on the cleaning port 13 is opened to clean the residual material in the inner tank body 103 and backwash the inner tank body 103 to ensure the cleanliness of the inner wall of the inner tank body 103.

[0037] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A melt crystallization separation device for purifying metaphenylenediamine, It is characterized in that The invention comprises a base (10), a tank assembly (1) and a sealing cover (2); the tank assembly (1) is mounted on the top of the base (10) by bolts, and the tank assembly (1) is composed of an outer tank body (101), a hollow interlayer (102) and an inner tank body (103); the inner tank body (103) is sleeved in the outer tank body (101), and the hollow interlayer (102) is arranged between the outer tank body (101) and the inner tank body (103); A sealing cover (2) is clamped on the top of the tank assembly (1), and a nitrogen inlet pipe (3) and a nitrogen outlet pipe (5) are respectively arranged on both sides of the top of the sealing cover (2), a digital thermometer (4) and a pressure gauge (6) are respectively installed on both ends of the top of the sealing cover (2) by means of screws, an inner tube (8) is welded to the bottom of the sealing cover (2), and barbs (9) are welded to the outer surface of the inner tube (8) at equal distances.

2. A melt crystallization separation device for purifying metaphenylenediamine according to claim 1, It is characterized in that A cleaning port (13) is connected to one side of the bottom end of the outer tank body (101), and the cleaning port (13) is connected to the inner tank body (103). A locking cover (14) is locked on the cleaning port (13).

3. A melt crystallization separation device for purifying metaphenylenediamine according to claim 1, It is characterized in that The other side of the bottom end of the outer tank body (101) is connected to a discharge pipe (12), and the discharge pipe (12) is connected to the hollow interlayer (102). A heat preservation water control valve (11) is provided on the discharge pipe (12).

4. A melt crystallization separation device for purifying metaphenylenediamine according to claim 1, It is characterized in that The detection ends of the digital thermometer (4) and the pressure gauge (6) are both located in the inner tank body (103); one end of the pressure gauge (6) is connected to a feed pipe (7), and the output port of the feed pipe (7) is located in the inner tank body (103).

5. A melt crystallization separation device for purifying metaphenylenediamine according to claim 1, It is characterized in that The nitrogen input pipe (3) and the nitrogen output pipe (5) are both provided with gas control valves, and the nitrogen input pipe (3) and the nitrogen output pipe (5) are both connected to the inner tank body (103).

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