Equipment for chloroacetic acid reaction process

Abstract

The utility model relates to equipment for a chloroacetic acid reaction process, which comprises a main reaction kettle, an acetic acid metering tank, an acetic acid tank and a sulfur tank, and the acetic acid metering tank is connected with the main reaction kettle through a material pipe; the acetic acid metering tank is connected with the acetic acid tank through an acetic acid pipe, and the acetic acid metering tank is connected with the sulfur tank through a sulfur pipe; the acetic acid pipe is provided with a liquid metering valve, and the sulfur pipe is provided with a solid metering valve. The improved process comprises the following steps: adding sulfur into acetic acid in advance, uniformly stirring, and adding into a reaction kettle together. Therefore, the problem that sulfur needs to be metered midway and is independently added into a reaction container in the prior art is avoided. Sulfur is added into acetic acid in advance and then introduced into the reaction kettle in a unified manner, and the reaction kettle does not need to be opened during feeding every time, so that the labor intensity of operators is reduced, and the operation safety is improved.

Description

Technical Field

[0001] The utility model relates to chemical reaction equipment, in particular to a technology for improving the reaction efficiency of chloroacetic acid production. Background Art

[0002] The chloroacetic acid reaction process usually consists of two reactors, the main and the auxiliary. First, the measured glacial acetic acid is added to the main acetic acid metering tank using a vacuum system, the main reactor is heated to a certain temperature, and chlorine is introduced to react. The current operation is a manual sulfur addition process, that is, the measured solid sulfur is pushed to the vicinity of the reactor with a flatbed truck. When adding sulfur, the reactor needs to be vacuumed first. When the pressure in the tank is negative, about half of the acetic acid is added first, and then the reaction worker and the material pouring personnel connect the vacuum pipeline for sulfur extraction and put it into the weighed sulfur barrel, open the sulfur addition plug, and use the vacuum to draw sulfur into the main reactor. After the sulfur is extracted, tighten the plug, open the feed valve on the reactor, and add the remaining acid.

[0003] This feeding method, on the one hand, requires manpower to temporarily push the sulfur material, and each sulfur addition process is likely to cause harm to surrounding personnel. Utility Model Content

[0004] The main purpose of the utility model is to provide a technology for pre-dissolving added sulfur solids to improve the feeding efficiency, that is, the improved process is to add sulfur to acetic acid in advance, stir it evenly, and then add it into the reaction kettle together.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a chloroacetic acid reaction process equipment, characterized in that it includes a main reactor, an acetic acid metering tank, an acetic acid tank and a sulfur tank, and the acetic acid metering tank is connected to the main reactor through a material pipe;

[0006] The acetic acid metering tank is connected to the acetic acid tank via an acetic acid pipe, and the acetic acid metering tank is connected to the sulfur tank via a sulfur pipe; the acetic acid pipe is provided with a liquid metering valve, and the sulfur pipe is provided with a solid metering valve.

[0007] Preferably, the acetic acid metering tank is connected to a vacuum pump via a vacuum tube to provide negative pressure into the acetic acid metering tank, so that the acetic acid tank is sucked into the acetic acid metering tank through the acetic acid tube; the sulfur in the sulfur tank can also be sucked into the acetic acid metering tank through the sulfur tank.

[0008] Preferably, the acetic acid metering tank is provided with a mixing and stirring rod.

[0009] Preferably, the bottom of the acetic acid metering tank has an outflow port, the outflow port has a control valve, and the outflow port is connected to the main reactor through the material pipe.

[0010] Preferably, the sulfur in the sulfur tank flows into the acetic acid metering tank by gravity.

[0011] The beneficial effects of the utility model are as follows: the improved process is to add sulfur to acetic acid in advance, stir it evenly, and then add it to the reactor together. This avoids the problem in the prior art that sulfur needs to be measured midway and added to the reaction vessel separately. The present application adds sulfur to acetic acid in advance and then introduces it into the reactor uniformly. It is not necessary to open the reactor every time the material is added, which reduces the labor intensity of the operator and improves the safety of the operation. In the specific production process: start stirring, first use a vacuum pump to add about half of the prescribed amount of acetic acid to the acetic acid metering tank, then stop the pump and stop adding acid. Turn on the vacuum pump, open the sulfur valve (solid metering valve), and use the pressure difference to introduce the prescribed amount of sulfur into the acetic acid metering tank. When the sulfur is added, close the sulfur valve, turn off the vacuum pump, and stop adding sulfur. Turn on the acetic acid pump to add the remaining acetic acid, and when the material is stirred evenly, it can be introduced into the main reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0013] Figure 1 It is a schematic diagram of the equipment for the chloroacetic acid reaction process of the utility model;

[0014] Figure 2 It is a schematic diagram of the preferred mode of the equipment for the chloroacetic acid reaction process of the utility model; DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below. Example

[0016] like Figure 1 As shown, this embodiment provides a chloroacetic acid reaction process equipment, which includes a main reactor 10, an acetic acid metering tank 20, an acetic acid tank 30 and a sulfur tank 40, and the acetic acid metering tank 20 is connected to the main reactor 10 through a material pipe 21;

[0017] The acetic acid metering tank 20 is connected to the acetic acid tank 30 via an acetic acid pipe 22 , and the acetic acid metering tank 20 is connected to the sulfur tank 40 via a sulfur pipe 23 ; the acetic acid pipe 22 is provided with a liquid metering valve 24 , and the sulfur pipe 23 is provided with a solid metering valve 25 .

[0018] Preferably, the acetic acid metering tank 20 is connected to a vacuum pump 28 via a vacuum tube 27 to provide negative pressure into the acetic acid metering tank 20 , so that the acetic acid tank 30 is sucked into the acetic acid metering tank 20 through the acetic acid tube 22 ; the sulfur in the sulfur tank 40 can also be sucked into the acetic acid metering tank 20 through the sulfur tank 40 .

[0019] Preferably, the acetic acid metering tank 20 has a mixing and stirring rod 26 therein.

[0020] Preferably, the bottom of the acetic acid metering tank 20 has an outflow port, the outflow port has a control valve, and the outflow port is connected to the main reactor 10 through the material pipe 21 .

[0021] Preferably, if Figure 2 As shown, the sulfur in the sulfur tank 40 flows into the acetic acid metering tank 20 by gravity. That is, the sulfur tank 40 is located at a higher position, and after the solid metering valve 25 is opened, the sulfur is sent into the acetic acid metering tank 20 along the sulfur pipe 23. In this way, there is no need to provide negative pressure and the powdered sulfur can move downward into the acetic acid metering tank 20.

[0022] The beneficial effects of the utility model are as follows: the improved process is to add sulfur to acetic acid in advance, stir evenly, and then add it to the reactor together. This avoids the problem in the prior art that sulfur needs to be metered midway and added to the reaction vessel separately. The present application adds sulfur to acetic acid in advance and then introduces it into the reactor uniformly. It is not necessary to open the reactor every time the material is added, which reduces the labor intensity of the operator and improves the safety of the operation. In the specific production process: start stirring, first use a vacuum pump to add about half of the prescribed amount of acetic acid to the acetic acid metering tank, then stop the pump and stop adding acid. Turn on the vacuum pump, open the sulfur valve (solid metering valve), and use the pressure difference to introduce the prescribed amount of sulfur into the acetic acid metering tank. When the sulfur is added, close the sulfur valve, turn off the vacuum pump, and stop adding sulfur. Turn on the acetic acid pump to add the remaining acetic acid, and when the material is stirred evenly, it can be introduced into the main reactor.

[0023] In other embodiments, a recovery tank is also provided, and the material pipe is connected to the recovery tank and the main reactor respectively through a three-way valve. When there is residual liquid that is not needed in the acetic acid metering tank or waste liquid is generated when cleaning the acetic acid metering tank, these liquids are discharged into the recovery tank for storage, so there is no need to discharge them into the main reactor.

[0024] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A chloroacetic acid reaction process equipment, characterized in that, It includes a main reactor, an acetic acid metering tank, an acetic acid tank and a sulfur tank, wherein the acetic acid metering tank is connected to the main reactor through a material pipe; The acetic acid metering tank is connected to the acetic acid tank via an acetic acid pipe, and the acetic acid metering tank is connected to the sulfur tank via a sulfur pipe; the acetic acid pipe is provided with a liquid metering valve, and the sulfur pipe is provided with a solid metering valve.

2. Chloroacetic acid reaction process equipment according to claim 1, characterized in that, The acetic acid metering tank is connected to a vacuum pump through a vacuum tube to provide negative pressure to the acetic acid metering tank, so that the acetic acid tank is sucked into the acetic acid metering tank through the acetic acid tube; the sulfur in the sulfur tank can also be sucked into the acetic acid metering tank through the sulfur tube.

3. Chloroacetic acid reaction process equipment according to claim 1, characterized in that, The acetic acid metering tank is provided with a mixing stirring rod.

4. The chloroacetic acid reaction process equipment according to claim 1, characterized in that: The bottom of the acetic acid metering tank is provided with an outflow port, the outflow port is provided with a control valve, and the outflow port is connected with the main reaction kettle through the material pipe.

5. The chloroacetic acid reaction process equipment according to claim 1, characterized in that: The sulfur in the sulfur tank flows into the acetic acid metering tank by gravity.

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