Inert atmosphere injection device for chloroethylene carbonate production

Abstract

The utility model discloses an inert atmosphere injection device for chloroethylene carbonate production, which relates to the technical field of inert atmosphere injection devices and comprises a gas injection mechanism, a reaction kettle main body is mounted on the side surface of the gas injection mechanism, and the gas injection mechanism comprises a fixing frame and a gas suction pump. The surface of the fixing frame is fixedly connected with a high-pressure gas storage tank and a gas recovery tank, the getter pump is fixedly connected with the upper part of the fixing frame, the upper part of the getter pump is fixedly connected with a first connecting pipe, and the first connecting pipe is fixedly connected with the reaction kettle main body. Inert gas in the reaction kettle main body is pumped into the gas recovery tank through the getter pump to be stored, and when raw materials react next time, the inert gas recovered in the gas recovery tank is used as gas filled into the reaction kettle main body at a time by opening the third valve, so that the utilization rate of the inert gas is increased, and the energy consumption is reduced. The production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of inert gas injection devices, in particular to an inert gas injection device for the production of vinyl chloroformate. Background Technique

[0002] Vinyl chloroformate has a wide range of applications in the chemical industry and is often used as an important intermediate in organic synthesis to synthesize compounds such as polymers, drugs, and pesticides. When producing vinyl chloroformate, in order to prevent the raw materials from contacting with air and undergoing oxidation reactions, which may lead to a decline in the quality of the product, an inert gas is injected into the reaction kettle to avoid the problem of oxidation of the raw materials during the reaction process.

[0003] However, in the prior art, when injecting an inert gas into the reaction kettle, first, the air inside the reaction kettle is pumped out, and then the inert gas is injected into it. To further improve the purity of the inert gas inside the reaction kettle, the gas inside the reaction kettle will be discharged again, and then the inert gas will be injected again. However, when discharging the gas inside the reaction kettle for the second time, there is only a very small amount of air in the gas, and most of it is inert gas. Directly discharging the gas for the second time will cause waste of the inert gas and increase the production cost of the product. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem existing in the prior art that when discharging the gas inside the reaction kettle for the second time and then injecting the inert gas again, there is only a very small amount of air in the gas when discharging the gas inside the reaction kettle for the second time, and most of it is inert gas. Directly discharging the gas for the second time will cause waste of the inert gas and increase the production cost of the product. Therefore, an inert gas injection device for the production of vinyl chloroformate is proposed.

[0005] To achieve the above object, the present utility model adopts the following technical solution: An inert gas injection device for the production of ethylene carbonate chloride, comprising an air injection mechanism, a reaction kettle body is installed on the side of the air injection mechanism, the air injection mechanism includes a fixed frame, an air suction pump and an exhaust pipe, a high-pressure gas storage tank and a gas recovery tank are respectively fixedly connected to the surface of the fixed frame, the air suction pump is fixedly connected to the upper part of the fixed frame, and a first connecting pipe is fixedly connected to the upper part of the air suction pump, the first connecting pipe is fixedly connected to the reaction kettle body, the exhaust pipe is fixedly connected to the air suction pump, and a second connecting pipe is fixedly connected to the side of the exhaust pipe, the second connecting pipe is fixedly connected to the gas recovery tank, and a second valve is fixedly connected to the surface of the second connecting pipe, a third connecting pipe is fixedly connected to the upper part of the gas recovery tank, the third connecting pipe is fixedly connected to the reaction kettle body, and a third valve is fixedly connected to the surface of the third connecting pipe, a fourth connecting pipe is fixedly connected to the surface of the high-pressure gas storage tank, the fourth connecting pipe is fixedly connected to the reaction kettle body, and a fourth valve is fixedly connected to the surface of the fourth connecting pipe, a first valve is fixedly connected to the surface of the exhaust pipe.

[0006] Preferably, the gas recovery tank is located above the high-pressure gas storage tank, and the air suction pump is located on the side of the gas recovery tank.

[0007] Preferably, a first pressure gauge is fixedly connected to the upper part of the gas recovery tank.

[0008] Preferably, a second pressure gauge is fixedly connected to the upper part of the high-pressure gas storage tank.

[0009] Preferably, a third pressure gauge is fixedly connected to the side of the reaction kettle body.

[0010] Preferably, a fifth connecting pipe is fixedly connected to the side of the high-pressure gas storage tank, one end of the fifth connecting pipe is fixedly connected to the gas recovery tank, and a fifth valve is fixedly connected to the surface of the fifth connecting pipe.

[0011] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0012] 1. In the present utility model, after the reaction inside the reaction kettle body is completed, the inert gas inside the reaction kettle body is pumped into the gas recovery tank for storage again through the air suction pump. When the raw material reaction is carried out next time, the inert gas recovered inside the gas recovery tank is used as the gas to be filled into the reaction kettle body for the first time by opening the third valve, improving the utilization rate of the inert gas and reducing the production cost.

[0013] 2. In the present utility model, after injecting gas into the reaction kettle body once, the gas inside the reaction kettle body is pumped out again through the suction pump. At this time, most of the gas inside the reaction kettle body is inert gas. The exhaust pipe is closed through the first valve, and at the same time, the second valve is opened to introduce the gas discharged from the reaction kettle body for the second time into the gas recovery tank for storage. Then, inert gas is injected into the reaction kettle body again through the high-pressure gas storage tank to increase the concentration of inert gas inside the reaction kettle body and reduce the probability of the raw material undergoing an oxidation reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. 1 is a first three-dimensional structural schematic diagram of an inert atmosphere injection device for the production of vinyl chloroformate proposed by the present utility model;

[0015] Figure 2 FIG. 2 is a second three-dimensional structural schematic diagram of an inert atmosphere injection device for the production of vinyl chloroformate proposed by the present utility model;

[0016] Figure 3 FIG. 3 is a side view structural schematic diagram of an inert atmosphere injection device for the production of vinyl chloroformate proposed by the present utility model;

[0017] Figure 4 FIG. 4 is a structural schematic diagram of the fifth connecting pipe in an inert atmosphere injection device for the production of vinyl chloroformate proposed by the present utility model.

[0018] Legend: 1. Gas injection mechanism; 11. Fixed frame; 12. High-pressure gas storage tank; 13. Gas recovery tank; 14. Suction pump; 15. First connecting pipe; 16. Exhaust pipe; 17. First valve; 18. Second connecting pipe; 19. Second valve; 110. Third connecting pipe; 111. Third valve; 112. First pressure gauge; 113. Fourth connecting pipe; 114. Fourth valve; 115. Fifth connecting pipe; 116. Fifth valve; 117. Second pressure gauge; 118. Third pressure gauge; 2. Reaction kettle body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to more clearly understand the above-mentioned objects, features, and advantages of the present utility model, the present utility model will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0020] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0021] Embodiment 1

[0022] As Figures 1-4 shown, the utility model provides an inert gas injection device for the production of ethylene carbonate chloride, which includes an air injection mechanism 1. A reaction kettle main body 2 is installed on the side of the air injection mechanism 1. The air injection mechanism 1 includes a fixed frame 11, an air suction pump 14 and an exhaust pipe 16. A high-pressure gas storage tank 12 and a gas recovery tank 13 are respectively fixedly connected to the surface of the fixed frame 11. The air suction pump 14 is fixedly connected to the upper part of the fixed frame 11, and a first connecting pipe 15 is fixedly connected to the upper part of the air suction pump 14. The first connecting pipe 15 is fixedly connected to the reaction kettle main body 2. The exhaust pipe 16 is fixedly connected to the air suction pump 14, and a second connecting pipe 18 is fixedly connected to the side of the exhaust pipe 16. The second connecting pipe 18 is fixedly connected to the gas recovery tank 13, and a second valve 19 is fixedly connected to the surface of the second connecting pipe 18. A third connecting pipe 110 is fixedly connected to the upper part of the gas recovery tank 13. The third connecting pipe 110 is fixedly connected to the reaction kettle main body 2, and a third valve 111 is fixedly connected to the surface of the third connecting pipe 110. A fourth connecting pipe 113 is fixedly connected to the surface of the high-pressure gas storage tank 12. The fourth connecting pipe 113 is fixedly connected to the reaction kettle main body 2, and a fourth valve 114 is fixedly connected to the surface of the fourth connecting pipe 113. A first valve 17 is fixedly connected to the surface of the exhaust pipe 16. The gas recovery tank 13 is located above the high-pressure gas storage tank 12, and the air suction pump 14 is located on the side of the gas recovery tank 13.

[0023] Specifically describe the specific settings and functions of this embodiment below. When injecting inert gas into the reaction kettle main body 2, first turn on the air suction pump 14 to discharge the air inside the reaction kettle main body 2 from the exhaust pipe 16 through the first connecting pipe 15. Observe the air pressure inside the reaction kettle main body 2 through the third pressure gauge 118 to judge the situation of the air discharge inside the reaction kettle main body 2. After the first discharge of the air inside the reaction kettle main body 2, open the fourth valve 114 to inject the reaction kettle main body 2 into the reaction kettle main body 2 through the high-pressure gas storage tank 12. Observe the situation of the inert gas injection inside the reaction kettle main body 2 through the third pressure gauge 118, and keep the pressure inside the reaction kettle main body 2 the same as the external atmospheric pressure to avoid accelerating the aging of some structures of the reaction kettle main body 2 due to the long-term negative pressure or high-pressure environment of the reaction kettle main body 2;

[0024] After a single gas injection into the reaction kettle main body 2 is completed, the gas inside the reaction kettle main body 2 is pumped out again through the air suction pump 14. At this time, most of the gas inside the reaction kettle main body 2 is inert gas. Close the exhaust pipe 16 through the first valve 17, and at the same time open the second valve 19 to store the gas discharged from the reaction kettle main body 2 for the second time into the gas recovery tank 13. Then, inject inert gas into the reaction kettle main body 2 again through the high-pressure gas storage tank 12 to increase the concentration of inert gas inside the reaction kettle main body 2 and reduce the probability of the raw material undergoing an oxidation reaction;

[0025] After the reaction inside the reactor main body 2 is completed, the inert gas inside the reactor main body 2 is pumped into the gas recovery tank 13 for storage again through the suction pump 14. When the raw material reaction is carried out next time, the inert gas recovered inside the gas recovery tank 13 is used as the gas filled into the reactor main body 2 for the first time by opening the third valve 111, so as to improve the utilization rate of the inert gas and reduce the production cost.

[0026] Embodiment 2

[0027] As Figures 1-4 shown, a first pressure gauge 112 is fixedly connected to the upper part of the gas recovery tank 13, a second pressure gauge 117 is fixedly connected to the upper part of the high-pressure gas storage tank 12, a third pressure gauge 118 is fixedly connected to the side of the reactor main body 2, a fifth connecting pipe 115 is fixedly connected to the side of the high-pressure gas storage tank 12, one end of the fifth connecting pipe 115 is fixedly connected to the gas recovery tank 13, and a fifth valve 116 is fixedly connected to the surface of the fifth connecting pipe 115.

[0028] The overall effect achieved by this entire embodiment is that the pressure inside the high-pressure gas storage tank 12 is monitored through the second pressure gauge 117, and the pressure inside the gas recovery tank 13 is monitored through the first pressure gauge 112, which is convenient for monitoring and using the high-pressure gas storage tank 12 and the gas recovery tank 13. When the air pressure inside the gas recovery tank 13 is too low, the inert gas inside the high-pressure gas storage tank 12 can be transported into the gas recovery tank 13 by opening the fifth valve 116, so that the gas recovery tank 13 maintains the ability to supply gas to the inside of the reactor main body 2.

[0029] The usage method and working principle of this device: When injecting inert gas into the reactor main body 2, first open the suction pump 14 to discharge the air inside the reactor main body 2 from the exhaust pipe 16 through the first connecting pipe 15. Observe the air pressure inside the reactor main body 2 through the third pressure gauge 118 to judge the discharge situation of the air inside the reactor main body 2. After the first discharge of the air inside the reactor main body 2, open the fourth valve 114 to inject the reactor main body 2 into the reactor main body 2 through the high-pressure gas storage tank 12. Observe the injection situation of the inert gas inside the reactor main body 2 through the third pressure gauge 118 to keep the pressure inside the reactor main body 2 the same as the external atmospheric pressure;

[0030] After a primary gas injection into the reactor main body 2 is completed, the gas inside the reactor main body 2 is pumped out again through the suction pump 14. At this time, most of the gas inside the reactor main body 2 is inert gas. Close the exhaust pipe 16 through the first valve 17, and at the same time open the second valve 19 to introduce the gas discharged from the reactor main body 2 for the second time into the gas recovery tank 13 for storage. Then, inject inert gas into the reactor main body 2 again through the high-pressure gas storage tank 12 to increase the concentration of the inert gas inside the reactor main body 2;

[0031] After the reaction inside the reactor main body 2 is completed, the inert gas inside the reactor main body 2 is pumped into the gas recovery tank 13 for storage again by the suction pump 14. When the raw material reaction is carried out next time, the inert gas recovered inside the gas recovery tank 13 is used as the gas filled into the reactor main body 2 for the first time by opening the third valve 111. The pressure inside the high-pressure gas storage tank 12 is monitored by the second pressure gauge 117, and the pressure inside the gas recovery tank 13 is monitored by the first pressure gauge 112, which is convenient for monitoring the high-pressure gas storage tank 12 and the gas recovery tank 13. When the air pressure inside the gas recovery tank 13 is too low, the inert gas inside the high-pressure gas storage tank 12 can be transported into the gas recovery tank 13 by opening the fifth valve 116, so that the gas recovery tank 13 maintains the ability to supply gas to the inside of the reactor main body 2.

[0032] The above are only the preferred embodiments of the present invention, and are not limitations on the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An inert gas injection device for the production of chlorinated ethylene carbonate, characterized in that: It includes an air injection mechanism (1), and a reactor main body (2) is installed on the side of the air injection mechanism (1). The air injection mechanism (1) includes a fixing frame (11), a suction pump (14), and an exhaust pipe (16). A high-pressure gas storage tank (12) and a gas recovery tank (13) are respectively fixedly connected to the surface of the fixing frame (11). The suction pump (14) is fixedly connected to the upper part of the fixing frame (11), and a first connecting pipe (15) is fixedly connected to the upper part of the suction pump (14). The first connecting pipe (15) is fixedly connected to the reactor main body (2). The exhaust pipe (16) is fixedly connected to the suction pump (14), and a second connecting pipe (18) is fixedly connected to the side of the exhaust pipe (16). The second connecting pipe (18) is fixedly connected to the gas recovery tank (13), and a second valve (19) is fixedly connected to the surface of the second connecting pipe (18). A third connecting pipe (110) is fixedly connected to the upper part of the gas recovery tank (13). The third connecting pipe (110) is fixedly connected to the reactor main body (2), and a third valve (111) is fixedly connected to the surface of the third connecting pipe (110). A fourth connecting pipe (113) is fixedly connected to the surface of the high-pressure gas storage tank (12). The fourth connecting pipe (113) is fixedly connected to the reactor main body (2), and a fourth valve (114) is fixedly connected to the surface of the fourth connecting pipe (113). A first valve (17) is fixedly connected to the surface of the exhaust pipe (16).

2. An inert gas injection device for the production of vinyl chloroformate according to claim 1, characterized in that: The gas recovery tank (13) is located above the high-pressure gas storage tank (12), and the suction pump (14) is located on the side of the gas recovery tank (13).

3. An inert gas injection device for the production of ethylene carbonate chloride according to claim 1, characterized in that: A first pressure gauge (112) is fixedly connected to the upper part of the gas recovery tank (13).

4. An inert gas injection device for the production of vinyl chloroformate according to claim 1, characterized in that: A second pressure gauge (117) is fixedly connected to the upper part of the high-pressure gas storage tank (12).

5. An inert gas injection device for the production of vinyl chloroformate according to claim 1, characterized in that: A third pressure gauge (118) is fixedly connected to the side of the reactor main body (2).

6. The inert gas injection device for the production of chloroethylene carbonate according to claim 1, wherein: A fifth connecting pipe (115) is fixedly connected to the side of the high-pressure gas storage tank (12). One end of the fifth connecting pipe (115) is fixedly connected to the gas recovery tank (13), and a fifth valve (116) is fixedly connected to the surface of the fifth connecting pipe (115).

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