Liquid supplementing and adding device for preparing adiponitrile through acrylonitrile electrolytic dimerization

Abstract

The utility model relates to a liquid supplementing and adding device for synthesizing adiponitrile through acrylonitrile electrolytic dimerization, which comprises a liquid adding control cylinder, a liquid inlet component positioned on one side of the bottom of the liquid adding control cylinder and a liquid discharge component positioned at the bottom of the liquid adding control cylinder, and a negative pressure liquid supplementing component is arranged at the top of the liquid adding control cylinder and in the liquid adding control cylinder. The negative pressure liquid supplementing assembly comprises an adjusting barrel, an air cylinder and a sealing piece, a threaded opening is formed in the top of the liquid adding control barrel, the adjusting barrel is installed in the threaded opening in a meshed mode through external threads, the air cylinder is installed in the adjusting barrel, the sealing piece is clamped in the liquid adding control barrel and installed at the bottom of the air cylinder, and a limiting ring is welded to the bottom of the adjusting barrel and clamped in the liquid adding control barrel. According to the negative-pressure electrolyte supplementing device, supplemented electrolyte can be pushed into the mixing device through the negative-pressure electrolyte supplementing assembly, external gas can be prevented from entering the mixing device in the whole process, and therefore the safety during electrolysis can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical industry, in particular to a liquid replenishing device for synthesizing adiponitrile by electrolytic dimerization of acrylonitrile. Background Art

[0002] Acrylonitrile can produce adiponitrile through electrolytic dimerization. The reaction process is generally carried out in a mixing device filled with electrolyte. During the reaction, the electrolyte needs to be replenished regularly as the electrolyte is consumed.

[0003] After searching, a Chinese patent with announcement number: CN217699042U discloses a stirring and mixing reaction container, including a reaction box, a function box assembly is arranged between the left and right side walls of the upper inner cavity of the reaction box, the function box assembly includes two sliding rods, the outer parts of the two sliding rods are slidably sleeved with sliders, and a storage box is fixedly arranged between the two sliders. The utility model relates to the field of stirring and mixing technology.

[0004] When this patent is actually used, there are the following defects:

[0005] In this patent, when the solution is added to the reaction device, it is generally added directly through a pipe on one side, so it is easy to mix with external gases, which will lead to insufficient safety. Utility Model Content

[0006] In view of the technical problem that in the existing patents, the solution is generally added directly through a pipe on one side, which is easy to mix with external gas, thus leading to insufficient safety, the utility model provides a liquid adding device for synthesizing adiponitrile by electrolytic dimerization of acrylonitrile.

[0007] The technical scheme adopted by the utility model is: a liquid replenishing device for synthesizing adiponitrile by electrolytic dimerization of acrylonitrile, comprising a liquid replenishing control cylinder, a liquid inlet component located at one side of the bottom of the liquid replenishing control cylinder and a liquid discharge component located at the bottom of the liquid replenishing control cylinder, a negative pressure liquid replenishing component is arranged on the top of the liquid replenishing control cylinder and inside thereof, the negative pressure liquid replenishing component comprises a regulating cylinder, a cylinder and a sealing sheet, a threaded opening is opened on the top of the liquid replenishing control cylinder, the regulating cylinder is installed in the threaded opening by engaging with an external thread, the cylinder is installed in the regulating cylinder, and the sealing sheet is clamped in the liquid replenishing control cylinder and installed at the bottom of the cylinder.

[0008] Furthermore, a limiting ring is welded on the bottom of the regulating cylinder, and the limiting ring is clamped in the liquid adding control cylinder.

[0009] Furthermore, a twisting head is welded on the top of the adjusting cylinder, and an indicating folding piece is installed on the front side of the twisting head.

[0010] Furthermore, scale lines are engraved on the outer side wall of the liquid adding control cylinder.

[0011] Furthermore, the liquid inlet assembly includes a liquid inlet pipe and a liquid inlet control valve, one end of the liquid inlet pipe is fixedly installed on one side of the bottom of the liquid adding control cylinder, and the liquid inlet control valve is installed on the outside of the liquid inlet pipe.

[0012] Furthermore, the drainage assembly includes a drainage pipe and a drainage control valve. The drainage pipe is installed at the bottom of the liquid adding control cylinder, and the drainage control valve is installed outside the drainage pipe.

[0013] Furthermore, a balancing hole is provided on one side of the top of the liquid adding control cylinder.

[0014] The beneficial effects of the utility model are as follows: compared with the prior art, in the utility model,

[0015] 1. The utility model can use the pressure difference to push the added electrolyte into the mixing device through the negative pressure liquid replenishing component. The whole process can prevent external gas from entering the mixing device, thereby improving the safety during electrolysis.

[0016] 2. The utility model can control the initial position of the regulating cylinder through the connection structure between the regulating cylinder and the liquid adding control cylinder, thereby being able to control the initial liquid replenishment amount, and thus being able to accurately control the replenishment amount as required. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a stereoscopic diagram of the negative pressure fluid infusion component of the utility model;

[0019] Figure 3 It is a cross-sectional view of the utility model;

[0020] Figure 4 It is a cross-sectional view of the regulating cylinder of the utility model.

[0021] The markings in the figure are: 1. Liquid adding control cylinder; 2. Liquid inlet assembly; 201. Liquid inlet pipe; 202. Liquid inlet control valve; 3. Liquid discharge assembly; 301. Liquid discharge pipe; 302. Liquid discharge control valve; 4. Negative pressure liquid replenishing assembly; 401. Adjusting cylinder; 402. Cylinder; 403. Sealing piece; 5. Threaded mouth; 6. Limiting ring; 7. Twist head; 8. Indicator folding piece; 9. Scale line; 10. Balance hole. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The following is combined with Figure 1-Figure 4 The utility model is further described.

[0025] In order to solve the problems existing in the background technology, the present application proposes the following technical solution: a liquid replenishing device for synthesizing adiponitrile by electrolytic dimerization of acrylonitrile.

[0026] The specific technical solution includes a liquid adding control cylinder 1, a liquid inlet assembly 2 located at one side of the bottom of the liquid adding control cylinder 1, and a liquid discharge assembly 3 located at the bottom of the liquid adding control cylinder 1. The top of the liquid adding control cylinder 1 and its interior are provided with a negative pressure liquid replenishing assembly 4 for controlling the inhalation of electrolyte. The negative pressure liquid replenishing assembly 4 includes an adjusting cylinder 401, a cylinder 402 and a sealing sheet 403. A threaded opening 5 is provided at the top of the liquid adding control cylinder 1. The adjusting cylinder 401 is installed in the threaded opening 5 through an external thread engagement. Turning the adjusting cylinder 401 can control The length of the twisting cylinder in the liquid adding control cylinder 1 is adjusted, and negative pressure can be generated when twisting to draw part of the electrolyte into the liquid adding control cylinder 1. The cylinder 402 is installed in the adjusting cylinder 401. The initial state of the cylinder 402 is the extended state. The sealing piece 403 is stuck in the liquid adding control cylinder 1 and installed at the bottom of the cylinder 402. The position of the sealing piece 403 can be controlled by the cylinder 402. When the cylinder 402 pulls the sealing piece 403 to move, negative pressure can be generated in the liquid adding control cylinder 1 to achieve the effect of quantitatively attracting electrolyte.

[0027] In the specific technical solutions, such as Figure 2 and Figure 3 As shown, a limit ring 6 is welded at the bottom of the regulating cylinder 401, and the limit ring 6 is clamped in the liquid adding control cylinder 1. The limit ring 6 can limit the regulating cylinder 401, thereby preventing the regulating cylinder 401 from separating from the liquid adding control cylinder 1.

[0028] In the specific technical solutions, such as Figure 1 and Figure 2 As shown, a twisting head 7 is welded on the top of the adjusting cylinder 401, and the twisting head 7 can be used to conveniently twist the adjusting cylinder 401. An indicating folding piece 8 is installed on the front side of the twisting head 7. The bottom of the indicating folding piece 8 is in the same horizontal plane as the sealing piece 403 in the initial state in the liquid adding control cylinder 1. The indicating folding piece 8 can be used to conveniently know the position of the sealing piece 403, so that the liquid adding space in the liquid adding control cylinder 1 can be conveniently controlled, so that the liquid adding amount can be accurately controlled.

[0029] In the specific technical solutions, such as Figure 1 and Figure 2 As shown, scale lines 9 are engraved on the outer wall of the liquid adding control cylinder 1, and the position indicated by the indicating flap 8 can be known more accurately through the scale lines 9.

[0030] In the specific technical solutions, such as Figure 1 As shown, the liquid inlet component 2 includes a liquid inlet pipe 201 and a liquid inlet control valve 202. One end of the liquid inlet pipe 201 is fixedly installed on one side of the bottom of the liquid adding control cylinder 1 and the other end is connected to the container for storing electrolyte. The liquid inlet control valve 202 is installed on the outside of the liquid inlet pipe 201 close to the liquid adding control cylinder 1. When the negative pressure liquid replenishing component 4 controls the sealing plate 403 to move, the negative pressure generated in the liquid adding control cylinder 1 can quantitatively draw the electrolyte in the container for storing electrolyte into the liquid adding control cylinder 1 through the liquid inlet pipe 201.

[0031] In the specific technical solutions, such as Figure 1 As shown, the discharge assembly 3 includes a discharge pipe 301 and a discharge control valve 302. The discharge pipe 301 is installed at the bottom of the liquid addition control cylinder 1, and the bottom of the discharge pipe 301 is installed to the top of the mixing device. The discharge control valve 302 is installed on the outside of the discharge pipe 301 close to the liquid addition control cylinder 1. The added electrolyte can be discharged into the mixing device through the discharge pipe 301.

[0032] In the specific technical solutions, such as Figure 3 As shown, a balance hole 10 is opened on one side of the top of the liquid adding control cylinder 1, and the balance hole 10 can ensure the air pressure balance in the upper half of the liquid adding control cylinder 1.

[0033] In order for those skilled in the art to fully understand the technical solution, this application makes the following overall summary:

[0034] When the device is in use, the bottom of the discharge pipe 301 is installed on the top of the mixing device. When electrolyte needs to be supplemented, the use position of the regulating cylinder 401 is adjusted to determine the initial position of the sealing sheet 403. The position of the negative pressure liquid replenishing component 4 can be adjusted by twisting the twisting head 7. The position of the sealing sheet 403 can be determined by observing the overlap position of the indicating folding piece 8 and the scale line 9. The space moved by the sealing sheet 403 after adjustment is the initial supplement amount. Then, the liquid inlet control valve 202 is opened, the cylinder 402 is connected to the external power supply and the cylinder 402 is controlled to retract, so that the cylinder 40 When the sealing sheet 403 is pulled upward, the negative pressure generated in the liquid adding control cylinder 1 can draw the electrolyte into the liquid adding control cylinder 1. The distance moved by the cylinder 402 is the secondary replenishment amount. The initial replenishment amount and the secondary replenishment amount are the total replenishment amount. Therefore, the replenishment amount of the electrolyte can be flexibly controlled. Then, the liquid inlet control valve 202 is closed and the liquid discharge control valve 302 is opened. Finally, the cylinder 402 is controlled to extend again, so that the replenished electrolyte can be pushed into the mixing device. The whole process can prevent external gas from entering the mixing device, thereby improving the safety during electrolysis.

[0035] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0036] Although the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid replenishing device for synthesizing adiponitrile by electrolytic dimerization of acrylonitrile, comprising a liquid replenishing control cylinder (1), a liquid inlet assembly (2) located at one side of the bottom of the liquid replenishing control cylinder (1), and a liquid discharge assembly (3) located at the bottom of the liquid replenishing control cylinder (1), characterized in that: A negative pressure fluid replenishment component (4) is arranged on the top of the fluid adding control cylinder (1) and inside thereof, and the negative pressure fluid replenishment component (4) includes an adjusting cylinder (401), a cylinder (402) and a sealing sheet (403). A threaded opening (5) is opened on the top of the fluid adding control cylinder (1), the adjusting cylinder (401) is installed in the threaded opening (5) by means of external thread engagement, the cylinder (402) is installed in the adjusting cylinder (401), and the sealing sheet (403) is clamped in the fluid adding control cylinder (1) and installed at the bottom of the cylinder (402).

2. A liquid replenishing device for synthesizing adiponitrile by electrolytic dimerization of acrylonitrile according to claim 1, characterized in that: A limiting ring (6) is welded to the bottom of the regulating cylinder (401), and the limiting ring (6) is clamped in the liquid addition control cylinder (1).

3. The liquid replenishing device for synthesizing adiponitrile by electrolytic dimerization of acrylonitrile according to claim 1, characterized in that: A twisting head (7) is welded on the top of the adjusting cylinder (401), and an indicating flap (8) is installed on the front side of the twisting head (7).

4. The liquid replenishing device for synthesizing adiponitrile by electrolytic dimerization of acrylonitrile according to claim 1, characterized in that: The outer side wall of the liquid adding control cylinder (1) is engraved with scale lines (9).

5. The liquid replenishing device for synthesizing adiponitrile by electrolytic dimerization of acrylonitrile according to claim 1, characterized in that: The liquid inlet assembly (2) comprises a liquid inlet pipe (201) and a liquid inlet control valve (202); one end of the liquid inlet pipe (201) is fixedly mounted on one side of the bottom of the liquid adding control cylinder (1); and the liquid inlet control valve (202) is mounted on the outside of the liquid inlet pipe (201).

6. The liquid replenishing device for synthesizing adiponitrile by electrolytic dimerization of acrylonitrile according to claim 1, characterized in that: The liquid discharge assembly (3) comprises a liquid discharge pipe (301) and a liquid discharge control valve (302); the liquid discharge pipe (301) is installed at the bottom of the liquid addition control cylinder (1); and the liquid discharge control valve (302) is installed outside the liquid discharge pipe (301).

7. The liquid replenishing device for synthesizing adiponitrile by electrolytic dimerization of acrylonitrile according to claim 1, characterized in that: A balance hole (10) is provided on one side of the top of the liquid adding control cylinder (1).

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