CN216879258U - Chloroacetic acid reaction unit - Google Patents

Abstract

The embodiment of the application relates to a chloroacetic acid reaction unit, be located outside the retort including retort, first end, the second end stretches into the first pipeline in bottom in the retort, establish in the retort and with first pipe connection's bubbling pipe and establish the gas pocket on the bubbling pipe, the quantity of bubbling pipe is many and is radially. The chloroacetic acid reaction unit disclosed in the embodiment of the application increases the contact area between acetic acid and chlorine by reducing the volume of chlorine bubbles, so as to improve the yield.

Description

Chloroacetic acid reaction unit

Technical Field

The application relates to the technical field of chemical industry, in particular to a chloroacetic acid reaction device.

Background

Chlorine gas needs to be introduced into acetic acid in the preparation process of chloroacetic acid, the mixing degree of the acetic acid and the chlorine gas directly influences the yield, the chlorine gas is introduced into the acetic acid and then rises under the action of buoyancy, the contact time between the chlorine gas and the acetic acid is shortened, and how to increase the contact time is an important research subject for improving the yield.

Disclosure of Invention

The embodiment of the application provides a chloroacetic acid reaction unit, increases the area of contact of acetic acid and chlorine through the mode of reducing the chlorine bubble volume for improve the yield.

The above object of the embodiments of the present application is achieved by the following technical solutions:

the embodiment of the application provides a chloroacetic acid reaction unit, includes:

a reaction tank;

the first end of the first pipeline is positioned outside the reaction tank, and the second end of the first pipeline extends into the bottom of the reaction tank;

the bubbling pipe is arranged in the reaction tank and is connected with the first pipeline; and

the air hole is arranged on the bubbling pipe;

wherein, the number of the bubbling pipes is a plurality of and radial.

In a possible implementation manner of the embodiment of the application, three groups of air holes are arranged on each bubbling tube, and the air holes in the same group are arranged at intervals along the axis of the bubbling tube;

the included angle between any two groups of air holes is 120 degrees;

wherein a group of air holes face to the bottom surface of the reaction tank.

In one possible implementation of the embodiment of the present application, the first pipe includes an input pipe and a gas chamber connected to the input pipe;

each bubble tube is connected with the air chamber.

In one possible implementation of the embodiments of the present application, the air chamber is rotatably connected to the input duct.

In a possible implementation manner of the embodiment of the application, the reactor further comprises a driving device arranged on the outer wall of the reaction tank, and a rotating shaft of the driving device extends into the reaction tank and is connected with the air chamber for driving the air chamber to rotate.

In one possible implementation of the embodiment of the present application, an end of the bubble tube, which is not connected to the air chamber, is bent in a direction opposite to the rotation direction.

Drawings

Fig. 1 is a schematic structural diagram of a chloroacetic acid reaction apparatus provided in an embodiment of the present application.

Fig. 2 is a schematic distribution diagram of a bubble tube according to an embodiment of the present disclosure.

Fig. 3 is a schematic cross-sectional view of a bubbler tube according to an embodiment of the present disclosure.

FIG. 4 is a schematic cross-sectional view of another alternative bubbler tube provided in accordance with an embodiment of the present application.

In the figure, 11, a reaction tank, 12, a first pipeline, 13, a bubble tube, 14, an air hole, 121, an input pipeline, 122, an air chamber, 2 and a driving device.

Detailed Description

The technical solution of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, for the chloroacetic acid reaction apparatus disclosed in the embodiment of the present application, the apparatus is composed of a reaction tank 11, a first pipeline 12, a bubbling pipe 13, and the like, for convenience of description, two ends of the first pipeline 12 are respectively referred to as a first end of the first pipeline 12 and a second end of the first pipeline 12, the first end of the first pipeline 12 is located outside the reaction tank 11, and the second end extends into the bottom of the reaction tank 11 to inject chlorine into the bubbling pipe 13.

The bubbling pipe 13 is positioned in the reaction tank 11 and connected with the first pipeline 12, the chlorine injected by the first pipeline 12 is sprayed out through the air holes 14 on the bubbling pipe 13, and the chlorine in the spraying process can form a large amount of small bubbles, so that the contact area of the chlorine and the acetic acid can be effectively increased.

Referring to fig. 2, the number of the bubble tubes 13 is plural and distributed radially, and in some possible implementations, the bubble tubes 13 surround the first pipe 12 in a circular array.

For example, if a cube has a volume of 1 and a surface area of 6, and if the cube is cut, a large number of small cubes are obtained, the sum of the surface areas of the small cubes is much larger than 6. Obviously, after the chlorine is subjected to gas bubbling, the contact area of the chlorine and the acetic acid is rapidly increased, and the yield can be effectively improved, because the more the chlorine is involved in the reaction process, the more the chloroacetic acid is in the mixture. In addition, the smaller the volume of the bubble, the faster the rate of absorption.

Referring to fig. 3, as a specific embodiment of the chloroacetic acid reaction apparatus provided by the application, three sets of air holes 14 are provided on each bubbling tube 13, the air holes 14 in the same set are spaced along the axis of the bubbling tube 13, the included angle between any two sets of air holes 14 is 120 degrees, one set of air holes 14 in the three sets faces the bottom surface of the reaction tank 11, and the other two sets face the side surface of the reaction tank 11.

The chlorine gas discharged toward the gas holes 14 in the bottom surface of the reaction tank 11 can react with the acetic acid located below the bubbling pipe 13, and the chlorine gas discharged from the other two gas holes 14 can react with the acetic acid along the way in the course of rising.

Referring to fig. 1, as an embodiment of the chloroacetic acid reaction apparatus provided in the application, the first pipe 12 includes an input pipe 121 and an air chamber 122 connected to the input pipe 121, one end of the bubbling pipe 13 is connected to the air chamber 122, and the other end is a closed end, so that the number of the bubbling pipes 13 can be increased after the air chamber 122 is added.

In some possible implementations, the end of the bubble tube 13 not connected to the gas chamber 122 is bent in the direction opposite to the rotation direction, which can increase the length of the bubble tube 13, thereby further enlarging the influence range of the bubble tube 13 and further improving the mixing degree of the acetic acid and the chlorine.

Further, referring to fig. 1, the gas chamber 122 is rotatably connected to the input pipe 121, that is, under the action of an external force, the gas chamber 122 can rotate under the action of the external force, that is, the bubbling pipe 13 connected to the gas chamber 122 can rotate around the input pipe 121, so that the chlorine gas sprayed from the bubbling pipe 13 can be distributed more uniformly in the reaction tank 11.

For example, if the bubble tube 13 cannot move and the area of influence of the bubble tube 13 is distributed near and above the bubble tube 13, there will be blind areas between adjacent bubble tubes 13 unless the density of the bubble tubes 13 is sufficiently dense. When the bubble tube 13 starts to rotate, the existence of the blind area can be fundamentally eliminated.

At this time, the positions of the three sets of air holes 14 on the bubbling tube 13 need to be adjusted, the first set of air holes 14 faces the bottom surface of the reaction tank 11, the second set of air holes 14 faces the direction opposite to the moving direction of the bubbling tube 13, and the third set of air holes 14 faces the top surface or the side surface of the reaction tank 11 and the direction needs to be opposite to the moving direction of the bubbling tube 13, please refer to fig. 4.

Of course, the rotation of the gas chamber 122 may be performed by using the driving device 2, the driving device 2 is installed on the outer wall of the reaction tank 11, and the rotation shaft of the driving device 2 extends into the reaction tank 11 and is connected to the gas chamber 122.

In some possible implementations, the driving device 2 uses a motor, a mechanical seal is installed on the reaction tank 11, and a rotating shaft of the motor penetrates through the mechanical seal and is connected to the air chamber 122 to drive the air chamber 122 to rotate.

Of course, a single rotating shaft may be used, the rotating shaft penetrates through the mechanical seal and is rotatably connected with the mechanical seal, the motor mounted on the outer wall of the reaction tank 11 is connected with one end of the rotating shaft, and the other end of the rotating shaft is connected with the air chamber 122.

In some possible implementations, the cross-sectional shape of the end of the shaft connected to the air chamber 122 is rectangular or triangular and is inserted into a mating blind hole in the air chamber 122.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (6)

1. A chloroacetic acid reaction apparatus, comprising:

a reaction tank (11);

the first end of the first pipeline (12) is positioned outside the reaction tank (11), and the second end of the first pipeline extends into the bottom of the reaction tank (11);

a bubbling pipe (13) arranged in the reaction tank (11) and connected with the first pipeline (12); and

an air hole (14) provided in the bubble tube (13);

wherein, the number of the bubbling pipes (13) is a plurality of and radial.

2. The chloroacetic acid reaction unit of claim 1, characterized in that each bubble tube (13) is provided with three sets of air holes (14), the air holes (14) in the same set are spaced along the axis of the bubble tube (13);

the included angle between any two groups of air holes (14) is 120 degrees;

one group of air holes (14) face to the bottom surface of the reaction tank (11).

3. Chloroacetic acid reaction unit according to claim 1, characterized in that the first conduit (12) comprises an input conduit (121) and a gas chamber (122) connected to the input conduit (121);

each bubble tube (13) is connected with an air chamber (122).

4. A chloroacetic acid reaction unit according to claim 3, characterized in that the gas chamber (122) is rotatably connected to the inlet conduit (121).

5. The chloroacetic acid reaction apparatus of claim 4, further comprising a driving device (2) disposed on the outer wall of the reaction tank (11), wherein the shaft of the driving device (2) extends into the reaction tank (11) and is connected to the gas chamber (122) for driving the gas chamber (122) to rotate.

6. A chloroacetic acid reaction apparatus according to claim 3, characterized in that the end of the bubbling tube (13) not connected to the gas chamber (122) is bent in a direction opposite to the rotation direction.

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