Continuous purification system for hydrogen chloride gas

Abstract

The hydrogen chloride gas continuous purification system comprises a hydrochloric acid storage tank, the hydrochloric acid storage tank is connected with a filling system through a filling pump pipeline, an acid mist recovery pipeline is arranged on the hydrochloric acid storage tank, and the acid mist recovery pipeline is connected with a spraying chamber of a spraying tower; a centrifugal fan is arranged on the top surface of the spray tower in a pipeline connection manner; a circulating pipeline is arranged on the spray tower, and a diluted hydrochloric acid circulating pump is arranged on the circulating pipeline. The utility model solves the problem of incomplete acid mist recovery in the prior art, realizes the real-time and thorough recovery of acid mist, avoids the dissipation of acid mist, improves the production safety, and avoids the waste of materials at the same time.

Description

Technical Field

[0001] This utility model relates to the field of purification of acidic gas production lines, and in particular to a continuous purification system for hydrogen chloride gas. Background Technology

[0002] Hydrochloric acid is highly volatile, and its gas can easily escape during production, storage, and filling. In particular, during storage, real-time extraction is necessary to prevent the accumulation of acid mist.

[0003] Current technologies for handling hydrochloric acid volatile gases typically involve directly discharging the condensed acid from the hydrogen chloride gas pipeline into plastic-coated steel drums, and then manually transporting the collected waste acid to a low-level tank in the vinyl chloride boundary for recycling. This recycling method cannot effectively recover the escaped hydrogen chloride gas. During operation, acid mist accumulates, causing environmental pollution and accelerating the corrosion of storage tanks, surrounding equipment, and pipelines, seriously threatening the respiratory tract and eyes of on-site personnel. Furthermore, the escaped acid mist also represents a waste of raw materials. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a hydrogen chloride gas continuous purification system that is reasonably configured, can prevent acid mist from escaping, and can recycle and reuse volatile acid mist.

[0005] The equipment includes a hydrochloric acid storage tank, which is connected to a filling system via a filling pump pipeline;

[0006] An acid mist recovery pipe is installed on top of the hydrochloric acid storage tank, and the acid mist recovery pipe is connected to the spray chamber of the spray tower.

[0007] A centrifugal fan is installed in the pipe connection on the top surface of the spray tower;

[0008] The spray tower is equipped with a circulation pipe. One end of the circulation pipe is located at the top of the spray tower and connected to the spray system pipe of the spray tower, and the other end is located in the storage tank at the bottom of the spray tower.

[0009] A dilute hydrochloric acid circulation pump is installed on the circulation pipeline, and the circulation pipeline is connected to the hydrochloric acid desorption pipeline via a tee. The hydrochloric acid desorption pipeline is connected to the hydrochloric acid desorption device, and a shut-off valve is installed on the hydrochloric acid desorption pipeline.

[0010] The effect achieved is that the volatile acid mist in the hydrochloric acid storage tank is drawn into the spray chamber of the spray tower in real time through the acid mist recovery pipeline, allowing the acid mist to dissolve rapidly in water. The medium inside the spray tower repeatedly absorbs the acid mist, forming dilute hydrochloric acid; the dilute hydrochloric acid then goes to the hydrochloric acid desorption device through the hydrochloric acid desorption pipeline.

[0011] The beneficial effects of this utility model are: This utility model solves the problem of incomplete acid mist recovery in the prior art, realizes real-time and complete acid mist recovery, avoids acid mist dispersion, improves production safety, and also avoids material waste. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a continuous purification system for hydrogen chloride gas according to the present invention;

[0013] Figure label:

[0014] 1-Centrifugal fan 2-Spray tower 3-Hydrochloric acid desorption pipeline 4-Dilute hydrochloric acid circulation pump 5-Circulation pipeline 6-Hydrochloric acid storage tank 7-Filling pump

[0015] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0016] Reference Figure 1 The present invention provides a continuous purification system for hydrogen chloride gas, including a hydrochloric acid storage tank 6, which is connected to a filling system via a filling pump 7.

[0017] An acid mist recovery pipe is installed on the top of the hydrochloric acid storage tank 6, and the acid mist recovery pipe is connected to the spray chamber of the spray tower 2.

[0018] A centrifugal fan 1 is connected to a pipe on the top surface of the spray tower 2;

[0019] The spray tower 2 is equipped with a circulation pipe 5. One end of the circulation pipe 5 is located at the top of the spray tower 2 and connected to the spray system pipe of the spray tower 2, and the other end is located in the storage tank at the bottom of the spray tower 2.

[0020] A dilute hydrochloric acid circulation pump 4 is installed on the circulation pipeline 5, and the circulation pipeline 5 is connected to the hydrochloric acid desorption pipeline 3 via a tee. The hydrochloric acid desorption pipeline 3 is connected to the hydrochloric acid desorption device, and a shut-off valve is installed on the hydrochloric acid desorption pipeline 3.

[0021] The effect achieved is that, due to the centrifugal fan 1, the volatile acid mist in the hydrochloric acid storage tank 6 is pumped into the spray chamber of the spray tower 2 in real time through the acid mist recovery pipeline; after being sprayed by the recovery medium, that is, primary water, the acid mist is quickly dissolved by its strong water solubility.

[0022] Meanwhile, based on the continuous pumping and the setting of the dilute hydrochloric acid circulation pump 4, the medium inside the spray tower 2 repeatedly circulates to absorb acid mist and form dilute hydrochloric acid; the dilute hydrochloric acid goes through the hydrochloric acid desorption pipeline 3 to the hydrochloric acid desorption device, where it is boiled at high temperature to produce high-purity hydrogen chloride gas, which is then sent back to the vinyl chloride process.

[0023] Furthermore, one or more hydrochloric acid storage tanks 6 are provided, and each hydrochloric acid storage tank 6 is equipped with an independent filling pump 7.

[0024] Furthermore, one or more spray towers 2 are provided, and each spray tower 2 is equipped with at least two dilute hydrochloric acid circulating pumps 4.

[0025] Furthermore, one or more centrifugal fans 1 are provided to ensure powerful extraction.

[0026] Furthermore, the shut-off valve is an electric valve, and the shut-off valve, centrifugal fan 1, filling pump 7 and dilute hydrochloric acid circulating pump 4 are signal-connected to the DCS.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A continuous purification system for hydrogen chloride gas, comprising a hydrochloric acid storage tank, wherein the hydrochloric acid storage tank is connected to a filling system via a filling pump pipeline, characterized in that: An acid mist recovery pipe is installed on top of the hydrochloric acid storage tank, and the acid mist recovery pipe is connected to the spray chamber of the spray tower. A centrifugal fan is installed in the pipe connection on the top surface of the spray tower; The spray tower is equipped with a circulation pipe. One end of the circulation pipe is located at the top of the spray tower and connected to the spray system pipe of the spray tower, and the other end is located in the storage tank at the bottom of the spray tower. A dilute hydrochloric acid circulation pump is installed on the circulation pipeline, and the circulation pipeline is connected to the hydrochloric acid desorption pipeline via a tee. The hydrochloric acid desorption pipeline is connected to the hydrochloric acid desorption device, and a shut-off valve is installed on the hydrochloric acid desorption pipeline.

2. The continuous purification system for hydrogen chloride gas according to claim 1, characterized in that, The hydrochloric acid storage tanks are provided in one or more ways, and each hydrochloric acid storage tank is equipped with an independent filling pump.

3. The continuous purification system for hydrogen chloride gas according to claim 1, characterized in that, The spray tower is provided in one or more ways, and each spray tower is equipped with at least two dilute hydrochloric acid circulating pumps.

4. The continuous purification system for hydrogen chloride gas according to claim 1, characterized in that, One or more centrifugal fans are provided.

5. The continuous purification system for hydrogen chloride gas according to claim 1, characterized in that, The shut-off valve is an electric valve, and the shut-off valve, centrifugal fan, filling pump and dilute hydrochloric acid circulating pump are signal connected to the DCS.

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