Vinyl chloride dehydration device

Abstract

The utility model relates to the technical field of vinyl chloride dehydration, and discloses a vinyl chloride dehydration device which comprises a base and further comprises a dehydrator body arranged at the top of the base and used for dehydrating vinyl chloride, and the outer side of the dehydrator body is communicated with a first nitrogen inlet; the first connecting pipe is vertically arranged at the top of the dehydrator body, a second nitrogen inlet is formed in the outer side of the first connecting pipe, and a first nitrogen control valve is arranged on the outer side of the second nitrogen inlet; by arranging the clamping mechanism, the nitrogen pipeline can be conveniently connected with the first nitrogen inlet and the second nitrogen inlet, and by arranging the first nitrogen inlet, the first connecting pipe, the second nitrogen inlet, the first nitrogen control valve and the storage hopper to be matched for use, nitrogen can be conveniently conveyed, so that vinyl chloride is conveniently dehydrated; the device can adsorb the crude vinyl chloride monomer, and the dehydration process of the vinyl chloride monomer is improved when the dehydration is not complete in the previous system.

Description

Technical Field

[0001] The utility model relates to the technical field of vinyl chloride dehydration, in particular to a vinyl chloride dehydration device. Background Technique

[0002] In the production process of polyvinyl chloride, the task of the vinyl chloride process is to mix and dehydrate the qualified hydrogen chloride gas from the hydrogen chloride process and the qualified acetylene gas from the acetylene process, and react to generate crude vinyl chloride gas under the catalysis of mercuric chloride catalyst in the converter. The crude vinyl chloride gas after conversion is subjected to mercury removal, hydrogen chloride removal, and alkali washing purification treatment, so that the excessive hydrogen chloride is absorbed by hydrochloric acid in the combined tower, and the pH value of the crude vinyl chloride after alkali washing is 7. The purified crude vinyl chloride is compressed, condensed, and fractionated and purified to make the crude vinyl chloride into a monomer with qualified purity for polymerization use. The tail gas discharged from the system is recovered and treated through a pressure swing adsorption device.

[0003] Vinyl chloride is an important organic chemical raw material, widely used in the production of polyvinyl chloride, synthetic rubber, pharmaceuticals and other industries. In the actual application process, a large amount of water pollutants will be generated in the production and treatment process of vinyl chloride. Therefore, it is of great significance to develop an efficient vinyl chloride dehydration device. The existing vinyl chloride dehydration device can remove most of the water in the vinyl chloride system, but it is difficult to remove the water droplets in the system, resulting in a reduction in the dehydration quality of the device for vinyl chloride. Moreover, the vinyl chloride in the existing vinyl chloride dehydration device is prone to self-polymerization reaction in the presence of moisture, generating low-molecular-weight polymers, which may block pipelines, valves and equipment, resulting in the interruption of the production process and affecting the normal use of the device. Content of the Utility Model

[0004] The purpose of the utility model is to provide a vinyl chloride dehydration device to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a vinyl chloride dehydration device, including a base, further including:

[0006] A dehydrator body arranged on the top of the base for dehydrating vinyl chloride, and a first nitrogen inlet is communicated with the outside of the dehydrator body;

[0007] A first connecting pipe vertically installed on the top of the dehydrator body, a second nitrogen inlet is arranged on the outside of the first connecting pipe, a first nitrogen control valve is arranged on the outside of the second nitrogen inlet, connecting mechanisms are arranged on one side of the first nitrogen inlet and the second nitrogen inlet, a storage hopper is communicated with the top of the first connecting pipe, a support frame is fixed on the outside of the storage hopper, and the bottom plate of the support frame is fixedly connected with the top of the dehydrator body.

[0008] Preferably, the connecting mechanism includes a connecting ring fixed to one end of the first nitrogen inlet. A sealing ring is provided on the inner wall of the connecting ring. A connecting head is fixed to one side of the connecting ring, and a clamping block is threadedly connected to the outside of the connecting head.

[0009] Preferably, a vertically arranged second connecting pipe communicates with the top of the hopper, and a nitrogen outlet is provided on the outside of the second connecting pipe.

[0010] Preferably, a second nitrogen control valve is provided on the outside of the nitrogen outlet, and a solid caustic soda inlet is provided at the top of the second connecting pipe.

[0011] Preferably, a liquid caustic soda outlet and a vinyl chloride outlet are respectively provided on the outside of the dehydrator body, and valves are provided on the outside of both the liquid caustic soda outlet and the vinyl chloride outlet.

[0012] Preferably, a vertically arranged feed pipe communicates with the top of the dehydrator body.

[0013] Preferably, a vinyl chloride inlet is provided at the top of the feed pipe, and a sealing cover is provided at the top of the vinyl chloride inlet.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] By providing a clamping mechanism, the present utility model can facilitate the connection of the nitrogen pipeline, the first nitrogen inlet, and the second nitrogen inlet. Through the combined use of the first nitrogen inlet, the first connecting pipe, the second nitrogen inlet, the first nitrogen control valve, and the hopper, it is convenient to transport nitrogen, thereby facilitating the dehydration of vinyl chloride, enabling the device to adsorb when the dehydration of the crude vinyl chloride monomer in the previous system is incomplete, and improving the dehydration process of the vinyl chloride monomer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a preferred embodiment of the vinyl chloride dehydration device provided by the present utility model;

[0017] Figure 2 is a schematic structural diagram of the dehydrator body provided by the present utility model;

[0018] Figure 3 is a schematic structural diagram of the hopper provided by the present utility model;

[0019] Figure 4 is Figure 2 an enlarged structural diagram of the position A shown.

[0020] In the figure: 1. Base; 2. Dehydrator body; 3. First nitrogen inlet; 4. First connecting pipe; 5. Second nitrogen inlet; 6. First nitrogen control valve; 7. Connecting mechanism; 71. Connecting ring; 72. Sealing ring; 73. Connector; 74. Clamping block; 8. Hopper; 9. Support frame; 10. Second connecting pipe; 11. Nitrogen outlet; 12. Second nitrogen control valve; 13. Granular caustic soda inlet; 14. Liquid caustic soda outlet; 15. Vinyl chloride outlet; 16. Valve; 17. Feed pipe; 18. Vinyl chloride inlet; 19. Sealing cover. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-4 As shown, a vinyl chloride dehydration device includes a base 1. By setting the base 1, it is convenient to support the dehydrator body 2. On the top of the base 1, there is a dehydrator body 2 for dehydrating vinyl chloride. The outside of the dehydrator body 2 is communicated with a first nitrogen inlet 3. By setting the first nitrogen inlet 3, it is convenient to add nitrogen to the dehydrator body 2. A first connecting pipe 4 is vertically installed on the top of the dehydrator body 2. By setting the first connecting pipe 4, it is convenient to connect the hopper 8 with the dehydrator body 2. A second nitrogen inlet 5 is arranged outside the first connecting pipe 4. By setting the second nitrogen inlet 5, it is convenient to add nitrogen to the hopper 8 through the first connecting pipe 4. A first nitrogen control valve 6 is arranged outside the second nitrogen inlet 5. By setting the first nitrogen control valve 6, it is convenient to control the opening and closing of the second nitrogen inlet 5. Connecting mechanisms 7 are arranged on one side of the first nitrogen inlet 3 and the second nitrogen inlet 5. By setting the connecting mechanisms 7, it is convenient to connect the nitrogen pipeline with the first nitrogen inlet 3 and the second nitrogen inlet 5. The top of the first connecting pipe 4 is communicated with a hopper 8. By setting the hopper 8, it is convenient to store granular caustic soda. A support frame 9 is fixed outside the hopper 8, and the bottom plate of the support frame 9 is fixedly connected to the top of the dehydrator body 2. By setting the support frame 9, it is convenient to support the hopper 8.

[0023] The connecting mechanism 7 includes a connecting ring 71 fixed to one end of the first nitrogen inlet 3. By providing the connecting ring 71, it is convenient to connect the connecting head 73 to the first nitrogen inlet 3. A sealing ring 72 is provided on the inner wall of the connecting ring 71. By providing the sealing ring 72, it is convenient to seal the connection between the nitrogen pipeline and the first nitrogen inlet 3. A connecting head 73 is fixed to one side of the connecting ring 71. A clamping block 74 is threadedly connected to the outside of the connecting head 73. By using the connecting head 73 and the clamping block 74 in cooperation, it is convenient to connect the nitrogen pipeline, the first nitrogen inlet 3 and the second nitrogen inlet 5.

[0024] A vertically arranged second connecting pipe 10 is connected to the top of the storage hopper 8. By providing the second connecting pipe 10, it is convenient to connect the storage hopper 8 to the caustic soda inlet 13. A nitrogen outlet 11 is provided on the outside of the second connecting pipe 10. By providing the nitrogen outlet 11, it is convenient to discharge the nitrogen in the storage hopper 8. A second nitrogen control valve 12 is provided on the outside of the nitrogen outlet 11. By providing the second nitrogen control valve 12, it is convenient to control the opening and closing of the nitrogen outlet 11. A caustic soda inlet 13 is provided at the top of the second connecting pipe 10. By providing the caustic soda inlet 13, it is convenient to add caustic soda into the storage hopper 8.

[0025] A liquid caustic soda outlet 14 and a vinyl chloride outlet 15 are respectively provided on the outside of the dehydrator body 2. By providing the liquid caustic soda outlet 14, it is convenient to discharge the liquid caustic soda in the dehydrator body 2. By providing the vinyl chloride outlet 15, it is convenient to discharge the vinyl chloride in the dehydrator body 2. Valves 16 are provided on the outside of both the liquid caustic soda outlet 14 and the vinyl chloride outlet 15. By providing the valves 16, it is convenient to control the opening and closing of the liquid caustic soda outlet 14 and the vinyl chloride outlet 15. A vertically arranged feed pipe 17 is connected to the top of the dehydrator body 2. By providing the feed pipe 17, it is convenient to connect the vinyl chloride inlet 18 to the dehydrator body 2. A vinyl chloride inlet 18 is provided at the top of the feed pipe 17. By providing the vinyl chloride inlet 18, it is convenient to add vinyl chloride into the dehydrator body 2. A sealing cover 19 is provided at the top of the vinyl chloride inlet 18. By providing the sealing cover 19, it is convenient to seal the vinyl chloride inlet 18.

[0026] Working principle: When in use, first close the second nitrogen control valve 12, add granular caustic soda into the hopper 8 from the granular caustic soda inlet 13, introduce nitrogen into the hopper 8 through the second nitrogen inlet 5 to displace the air, and transport the granular caustic soda to the dehydrator body 2 through the first connecting pipe 4. Repeat the above operations until the height of the added granular caustic soda reaches the position of the vinyl chloride outlet 15. Then open the sealing cover 19, and let the crude vinyl chloride monomer containing moisture enter the dehydrator body 2 from the vinyl chloride inlet 18. After the moisture is adsorbed by the granular caustic soda, the crude vinyl chloride monomer with low water content enters the next process from the vinyl chloride outlet 15. When the granular caustic soda becomes a paste-like liquid caustic soda after adsorbing a large amount of moisture and its adsorption capacity decreases, close the vinyl chloride inlet 18 and the vinyl chloride outlet 15, open the liquid caustic soda outlet 14, introduce nitrogen, and discharge the paste-like liquid caustic soda from the liquid caustic soda outlet 14 until it is completely removed. Then close the liquid caustic soda outlet 14, continue to add granular caustic soda to the required height of the dehydrator body 2, and continue to use it for adsorption.

[0027] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vinyl chloride dehydration device, comprising a base (1), characterized in that, Also included are: A dehydrator body (2) arranged on the top of the base (1) for dehydrating vinyl chloride, and a first nitrogen inlet (3) is communicated with the outside of the dehydrator body (2); A first connecting pipe (4) vertically installed on the top of the dehydrator body (2), a second nitrogen inlet (5) is arranged on the outside of the first connecting pipe (4), a first nitrogen control valve (6) is arranged on the outside of the second nitrogen inlet (5), connecting mechanisms (7) are arranged on one side of the first nitrogen inlet (3) and the second nitrogen inlet (5), the top of the first connecting pipe (4) is communicated with a storage hopper (8), a support frame (9) is fixed on the outside of the storage hopper (8), and the bottom plate of the support frame (9) is fixedly connected with the top of the dehydrator body (2).

2. The vinyl chloride dehydration device according to claim 1, characterized in that: The connecting mechanism (7) includes a connecting ring (71) fixed at one end of the first nitrogen inlet (3), a sealing ring (72) is arranged on the inner wall of the connecting ring (71), a connecting head (73) is fixed on one side of the connecting ring (71), and a clamping block (74) is threadedly connected to the outside of the connecting head (73).

3. The vinyl chloride dehydration device according to claim 1, characterized in that: The top of the storage hopper (8) is communicated with a vertically arranged second connecting pipe (10), and a nitrogen outlet (11) is arranged on the outside of the second connecting pipe (10).

4. The vinyl chloride dehydration device according to claim 3, wherein: A second nitrogen control valve (12) is arranged on the outside of the nitrogen outlet (11), and a solid caustic soda inlet (13) is arranged at the top end of the second connecting pipe (10).

5. The vinyl chloride dehydration device according to claim 1, characterized in that: A liquid caustic soda outlet (14) and a vinyl chloride outlet (15) are respectively arranged on the outside of the dehydrator body (2), and valves (16) are arranged on the outside of the liquid caustic soda outlet (14) and the vinyl chloride outlet (15).

6. The vinyl chloride dehydration device according to claim 1, characterized in that: The top of the dehydrator body (2) is communicated with a vertically arranged feed pipe (17).

7. A vinyl chloride dehydration device according to claim 6, characterized in that: A vinyl chloride inlet (18) is arranged at the top end of the feed pipe (17), and a sealing cover (19) is arranged at the top end of the vinyl chloride inlet (18).

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