Concentrated thionyl chloride tail gas absorption device

Abstract

The utility model discloses a concentrated thionyl chloride tail gas absorption device, which belongs to the technical field of environmental protection equipment and comprises a reaction kettle, a condenser and a concentration receiving tank, the reaction kettle is connected with the condenser through a pipeline, the condenser is connected with the concentration receiving tank through a pipeline a, and the concentration receiving tank is connected with an emptying valve a through a pipeline b. The concentration receiving tank is communicated with a buffer tank through a pipeline c, the buffer tank is connected with an emptying valve b through a pipeline d, alkaline liquid is filled in the buffer tank, and the pipeline c is inserted into the alkaline liquid and is made of a polypropylene material; the buffer tank is connected with the vacuum discharging system through a pipeline e, and the buffer tank is made of polypropylene materials. The technical problems of environmental pollution and difficulty in maintenance of existing equipment are solved, and the method is mainly applied to organic synthesis of acyl chloride.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental protection equipment, and in particular relates to a concentrated thionyl chloride tail gas absorption device. Background Art

[0002] Acyl chloride (R-Cl) is synthesized in organic synthesis reactions by reacting carboxylic acid (R-COOH) with thionyl chloride (SOCl2). The thionyl chloride is in excess and post-treatment requires treatment of the excess thionyl chloride.

[0003] During the reaction and post-treatment process of thionyl chloride treatment, SO2 and HCl can be generated, which are highly acidic and corrosive, harmful to the human body and pollute the environment.

[0004] At present, during the process of reducing pressure and concentrating thionyl chloride, the acid gas generated passes through the receiving tank and the vacuum pipeline to the vacuum pump. Most vacuum pipelines are made of carbon steel or stainless steel, which is easy to cause pipeline corrosion. During the installation of vacuum pipes, they are installed together with other pipelines such as tail gas and public engineering pipelines, which makes maintenance difficult. In addition, acid gas enters the vacuum pump cavity and corrodes the vacuum pump. Pipeline maintenance, pump maintenance and replacement cause certain losses to enterprises.

[0005] Acidic gases enter the workshop / atmospheric environment and cause harm to the human body. After research and improvement, the applicant can solve the acidic gas generated during the reduced pressure concentration of thionyl chloride, reduce equipment corrosion by neutralizing the acidic gas generated, reduce environmental hazards, and reduce equipment maintenance costs, thereby achieving the goal of improving the economic benefits of the enterprise. Utility Model Content

[0006] In order to solve the technical problems raised in the background technology, the applicant proposed a concentrated thionyl chloride tail gas absorption device, and the technical solution adopted is as follows:

[0007] A concentrated thionyl chloride tail gas absorption device comprises a reactor, a condenser and a concentrated receiving tank, wherein the condenser is used for condensation and concentration, the reactor is connected to the condenser through a pipeline, the condenser is connected to the concentrated receiving tank through a pipeline a, wherein the concentrated receiving tank is connected to an emptying valve a through a pipeline b, and the core improvements of the utility model are as follows:

[0008] The concentration receiving tank is connected to the buffer tank through pipeline c, and the buffer tank is connected to the drain valve b through pipeline d. The buffer tank is filled with alkaline liquid, wherein pipeline c is inserted into the alkaline liquid and the material of pipeline c is polypropylene material.

[0009] The working principle of the utility model is as follows: by adding a buffer tank made of PP material, the concentration receiving tank and the buffer tank made of PP material are connected by a PP pipe, a one-way valve and a ball valve are installed on the PP pipe, a pressure vacuum gauge is installed in the PP buffer tank, and the PP pipe extends into the PP buffer storage tank, about 1 / 3 of the distance from the bottom.

[0010] Prepare 10% sodium hydroxide solution and add it to the buffer tank to make the sodium hydroxide solution reach 1 / 2 liquid level. When the thionyl chloride is concentrated under reduced pressure, the solution in the reactor is gasified and then cooled to the concentration receiving tank. The uncooled gas passes through the concentration receiving tank to the buffer tank, and the excess acid gas is absorbed by the alkali solution in the buffer tank.

[0011] Reduce the amount of acid gas entering the vacuum pipeline and vacuum pump. Reduce the cost of pipeline and equipment maintenance, and reduce the downtime caused by equipment and pipeline maintenance. Improve economic benefits.

[0012] The buffer tank is connected to the vacuum exhaust system through a pipeline e, wherein the buffer tank is made of polypropylene material, and is designed in this way for corrosion resistance.

[0013] Preferably: a ball valve and a one-way valve are provided on the pipeline connecting the concentration receiving tank and the buffer tank, and the one-way valve is used to prevent backflow.

[0014] Preferably: the buffer tank is provided with a pressure vacuum gauge, and the pressure vacuum gauge is used to monitor the pressure condition.

[0015] The technical solution of this application has the following beneficial effects:

[0016] 1) The cost of the buffer tank is lower than the maintenance cost;

[0017] 2) Reduce pipeline corrosion, vacuum pump maintenance, and reduce equipment maintenance costs;

[0018] 3) Reduce the losses caused by workshop shutdown due to maintenance;

[0019] 4) Reduce the impact on the environment and reduce harm to the human body.

[0020] 5) The device has a simple structure and is easy to disassemble and assemble. Storage tanks of different sizes can be configured according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a working principle diagram of the utility model.

[0022] In the figure: 1 reactor, 2 condenser, 3 concentration receiving tank, 4 buffer tank, 5 drain valve a, 6 ball valve, 7 check valve, 8 pressure vacuum gauge, 9 drain valve b. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0024] Example 1

[0025] As shown in the figure:

[0026] A concentrated thionyl chloride tail gas absorption device comprises a reactor 1, a condenser 2 and a concentrated receiving tank 3, wherein the reactor is connected to the condenser 2 through a pipeline, the condenser 2 is connected to the concentrated receiving tank 3 through a pipeline a, wherein the concentrated receiving tank 3 is connected to an emptying valve a5 through a pipeline b, and is characterized in that:

[0027] The concentration receiving tank 3 is connected to the buffer tank 4 through the pipeline c, and the buffer tank 4 is connected to the drain valve b9 through the pipeline d. The buffer tank 4 is filled with alkaline liquid, wherein the pipeline c is inserted into the alkaline liquid and the material of the pipeline c is polypropylene material;

[0028] The buffer tank 4 is connected to the vacuum exhaust system through a pipeline e, wherein the material of the buffer tank 4 is polypropylene;

[0029] A ball valve 6 and a one-way valve 7 are provided on the pipeline e connecting the concentration receiving tank 3 and the buffer tank 4;

[0030] The buffer tank 4 is provided with a pressure vacuum gauge 8 .

[0031] The working principle of the utility model is as follows: 10% sodium hydroxide solution is prepared and added to the buffer tank 4, so that the sodium hydroxide solution is added to 1 / 2 liquid level, and the solution in the reactor 1 is gasified and then cooled to the concentration receiving tank 3, and the uncooled gas passes through the concentration receiving tank 3 to the buffer tank 4, and the alkali solution in the buffer tank 4 absorbs the excess acid gas. Reduce the acid gas entering the vacuum pipeline and vacuum pump. Reduce the pipeline and equipment maintenance costs, and reduce the downtime caused by equipment and pipeline maintenance. Improve economic benefits.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A concentrated thionyl chloride tail gas absorption device, comprising a reactor (1), a condenser (2) and a concentrated receiving tank (3), wherein the reactor is connected to the condenser (2) through a pipeline, the condenser (2) is connected to the concentrated receiving tank (3) through a pipeline a, wherein the concentrated receiving tank (3) is connected to an emptying valve a (5) through a pipeline b, characterized in that: The concentration receiving tank (3) is connected to the buffer tank (4) via a pipeline c, and the buffer tank (4) is connected to the drain valve b (9) via a pipeline d. The buffer tank (4) is filled with alkaline liquid, wherein the pipeline c is inserted into the alkaline liquid and the material of the pipeline c is polypropylene material; The buffer tank (4) is connected to the vacuum exhaust system via a pipeline e, wherein the buffer tank (4) is made of polypropylene.

2. A concentrated thionyl chloride tail gas absorption device as claimed in claim 1, characterized in that: A ball valve (6) and a one-way valve (7) are provided on the pipeline e connecting the concentration receiving tank (3) and the buffer tank (4).

3. A concentrated thionyl chloride tail gas absorption device as claimed in claim 1, characterized in that: The buffer tank (4) is provided with a pressure vacuum gauge (8).

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