Hydrogen chloride gas overflow treatment device

Abstract

The utility model relates to the technical field of hydrogen chloride absorption, in particular to a hydrogen chloride gas overflow treatment device which comprises a hydrochloric acid storage tank, an acid mist absorber and a circulating pump. The device is reasonable and compact in structure and convenient to use, hydrogen chloride gas in the hydrochloric acid storage tank is absorbed and treated by using the filler type acid mist absorber according to the characteristic that hydrogen chloride is high in solubility in water, one part of diluted hydrochloric acid generated by absorption is recycled to the acid mist absorber, and the other part of diluted hydrochloric acid is pumped to the hydrochloric acid storage tank according to the liquid level of the acid mist absorber; the method is used for pressure swing adsorption treatment. Through a series of technical means of hydrogen chloride absorption, hydrochloric acid recycling and hydrochloric acid solution deep treatment, the risks of corrosion of pipeline equipment around the hydrochloric acid storage tank, serious environmental pollution and personnel suffocation caused by overflow of hydrogen chloride gas are eliminated. The device has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen chloride absorption, and is a device for treating the overflow of hydrogen chloride gas. Background Technique

[0002] In the production process of vinyl chloride by the calcium carbide method, there are mainly three sources of by-product hydrochloric acid: the condensate acid in the ion-exchange membrane process; the condensate acid generated during the mixing and dehydration process in the conversion process; and the by-product hydrochloric acid generated by the absorption of excessive hydrogen chloride by water during the synthesis of vinyl chloride. Among them, the output of by-product hydrochloric acid is relatively large.

[0003] As the temperature rises, the hydrogen chloride gas in the hydrochloric acid storage tank will volatilize into the atmosphere, causing serious corrosion of the pipeline equipment around the hydrochloric acid storage tank, serious environmental pollution, and even the risk of personnel asphyxiation in severe cases. Solving the problem of hydrogen chloride gas overflow in by-product hydrochloric acid has become a bottleneck restricting the production of enterprises.

[0004] Therefore, based on the above deficiencies in the storage of by-product hydrochloric acid in vinyl chloride production, it is very necessary to develop a device for treating the overflow of hydrogen chloride gas. Summary of the Invention

[0005] The utility model provides a device for treating the overflow of hydrogen chloride gas, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems of equipment corrosion, environmental pollution, and possible personnel asphyxiation caused by the overflow of hydrogen chloride in the existing hydrochloric acid storage tank.

[0006] The technical solution of the utility model is realized by the following measures: A device for treating the overflow of hydrogen chloride gas includes a hydrochloric acid storage tank and an acid mist absorber. There is a fixed connection between the top outlet of the hydrochloric acid storage tank and the middle inlet of the acid mist absorber through a hydrogen chloride pipeline, a fixed connection between the top inlet of the hydrochloric acid storage tank and the bottom outlet of the acid mist absorber through a dilute hydrochloric acid pipeline, and a fixed connection between the dilute hydrochloric acid pipeline and the upper inlet of the acid mist absorber through a dilute hydrochloric acid circulation pipeline.

[0007] The following is a further optimization and / or improvement of the above-mentioned technical solution of the utility model:

[0008] A circulation pump is fixedly installed on the dilute hydrochloric acid pipeline between the acid mist absorber and the dilute hydrochloric acid circulation pipeline.

[0009] A field pressure gauge is fixedly arranged on the dilute hydrochloric acid pipeline between the circulation pump and the dilute hydrochloric acid circulation pipeline. A water supply pipeline is fixedly connected to the dilute hydrochloric acid pipeline between the acid mist absorber and the circulation pump, and a second drain pipeline is fixedly connected to the dilute hydrochloric acid circulation pipeline.

[0010] A packing layer is arranged in the acid mist absorber, and the packing layer is located between the upper inlet and the middle inlet of the acid mist absorber.

[0011] A first remote liquid level gauge, a first on-site liquid level gauge and an acidity detector are fixedly arranged on the acid mist absorber below the above-mentioned packing layer.

[0012] A second remote liquid level gauge, a first on-site liquid level gauge and a remote thermometer are fixedly arranged on the above-mentioned hydrochloric acid storage tank, and a first drain pipeline is fixedly connected to the lower outlet of the hydrochloric acid storage tank.

[0013] A liquid level automatic control valve is fixedly arranged on the dilute hydrochloric acid pipeline between the above-mentioned water addition pipeline and the circulation pump, a first ball valve is fixedly arranged on the dilute hydrochloric acid circulation pipeline between the dilute hydrochloric acid pipeline and the second drain pipeline, a second ball valve is fixedly arranged on the dilute hydrochloric acid pipeline between the circulation pump and the hydrochloric acid storage tank, a third ball valve is fixedly arranged on the water addition pipeline, and an interlock is arranged between the liquid level automatic control valve, the first remote liquid level gauge and the acidity detector.

[0014] The above-mentioned device further includes a DCS controller, and the circulation pump, the first remote liquid level gauge, the acidity detector and the liquid level automatic control valve are all electrically connected to the DCS controller.

[0015] The structure of the utility model is reasonable and compact, and it is convenient to use. It uses a packed acid mist absorber to absorb and treat hydrogen chloride gas in the hydrochloric acid storage tank, eliminating the corrosion of pipeline equipment around the hydrochloric acid storage tank caused by the overflow of hydrogen chloride gas, serious environmental pollution and the risk of personnel asphyxiation. The utility model has the characteristics of safety, labor saving, simplicity and high efficiency. Brief Description of the Drawings

[0016] Attached Figure 1 is a schematic process flow diagram of the utility model.

[0017] Attached Figure 1 The codes in are: 1 is the hydrochloric acid storage tank, 2 is the acid mist absorber, 3 is the circulation pump, 4 is the hydrogen chloride pipeline, 5 is the dilute hydrochloric acid pipeline, 6 is the dilute hydrochloric acid circulation pipeline, 7 is the water addition pipeline, 8 is the first drain pipeline, 9 is the second drain pipeline, 10 is the first remote liquid level gauge, 11 is the first on-site liquid level gauge, 12 is the on-site pressure gauge, 13 is the remote thermometer, 14 is the second on-site liquid level gauge, 15 is the second remote liquid level gauge, 16 is the liquid level automatic control valve, 17 is the first ball valve, 18 is the second ball valve, 19 is the third ball valve, and 20 is the acidity detector. Detailed Embodiments

[0018] The utility model is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solutions of the utility model and the actual situation.

[0019] In the utility model, unless otherwise specified, the equipment and devices used are all the existing well-known and commonly used equipment and devices in the art.

[0020] In the present utility model, for the convenience of description, the relative positional relationships of the various components are all described according to the layout mode of the attached drawings of the specification. For example, the positional relationships such as front, rear, upper, lower, left, and right are determined according to the layout direction of the attached drawings of the specification. Figure 1 The layout mode of the attached drawings of the specification is used for description. For example, the positional relationships such as front, rear, upper, lower, left, and right are determined according to the layout direction of the attached drawings of the specification. Figure 1 of the specification.

[0021] The present utility model will be further described below in conjunction with embodiments and the accompanying drawings:

[0022] Embodiment 1: As shown in the attached drawings Figure 1 The hydrogen chloride gas overflow treatment device includes a hydrochloric acid storage tank 1 and an acid mist absorber 2. A hydrogen chloride pipeline 4 is fixedly connected between the top outlet of the hydrochloric acid storage tank 1 and the middle inlet of the acid mist absorber 2. A dilute hydrochloric acid pipeline 5 is fixedly connected between the top inlet of the hydrochloric acid storage tank 1 and the bottom outlet of the acid mist absorber 2. A dilute hydrochloric acid circulation pipeline 6 is fixedly connected between the dilute hydrochloric acid pipeline 5 and the upper inlet of the acid mist absorber 2.

[0023] According to actual needs, the above hydrogen chloride gas overflow treatment device can be further optimized or / and improved:

[0024] Embodiment 2: The difference from Embodiment 1 is that: As shown in the attached drawings Figure 1 A circulation pump 3 is fixedly installed on the dilute hydrochloric acid pipeline 5 between the acid mist absorber 2 and the dilute hydrochloric acid circulation pipeline 6.

[0025] Embodiment 3: The difference from Embodiments 1 to 2 is that: As shown in the attached drawings Figure 1 A field pressure gauge 12 is fixedly arranged on the dilute hydrochloric acid pipeline 5 between the circulation pump 3 and the dilute hydrochloric acid circulation pipeline 6. A water supply pipeline 7 is fixedly connected to the dilute hydrochloric acid pipeline 5 between the acid mist absorber 2 and the circulation pump 3. A second drain pipeline 9 is fixedly connected to the dilute hydrochloric acid circulation pipeline 6.

[0026] Before the acid mist absorber 2 is ventilated with gaseous hydrogen chloride, first, a certain level of water is replenished to the acid mist absorber 2 through the water supply pipeline 7. During the operation, the hydrochloric acid concentration in the acid mist absorber 2 is detected, and liquid phase replacement is carried out regularly through the water supply pipeline 7 to ensure that the hydrogen chloride gas is fully absorbed by water.

[0027] Embodiment 4: The difference from Embodiments 1 to 3 is that: As shown in the attached drawings Figure 1 A packing layer 20 is arranged inside the acid mist absorber 2. The packing layer 20 is located between the upper inlet and the middle inlet of the acid mist absorber 2. The packing of the packing layer 20 can be Pall rings or Raschig rings.

[0028] Embodiment 5: The difference from Embodiments 1 to 4 is that: As shown in the attached drawings Figure 1As shown, a first remote liquid level gauge 10, a first on-site liquid level gauge 11 and an acidity detector 20 are fixedly arranged on the acid mist absorber 2 below the packing layer 20.

[0029] Example 6: The difference from Examples 1 to 5 is that as shown in the appendix Figure 1 As shown, a second remote liquid level gauge 15, a first on-site liquid level gauge 14 and a remote temperature gauge 13 are fixedly arranged on the hydrochloric acid storage tank 1, and a first drain pipeline 8 is fixedly connected to the lower outlet of the hydrochloric acid storage tank 1.

[0030] Example 7: The difference from Examples 1 to 6 is that as shown in the appendix Figure 1 As shown, a liquid level automatic control valve 16 is fixedly arranged on the dilute hydrochloric acid pipeline 5 between the water supply pipeline 7 and the circulation pump 3, a first ball valve 17 is fixedly arranged on the dilute hydrochloric acid circulation pipeline 6 between the dilute hydrochloric acid pipeline 5 and the second drain pipeline 9, a second ball valve 18 is fixedly arranged on the dilute hydrochloric acid pipeline 5 between the circulation pump 3 and the hydrochloric acid storage tank 1, a third ball valve 19 is fixedly arranged on the water supply pipeline 7, and an interlock is arranged between the liquid level automatic control valve 16, the first remote liquid level gauge 10 and the acidity detector 20.

[0031] Example 8: The difference from Examples 1 to 7 is that as shown in the appendix Figure 1 As shown, the device further includes a DCS controller, and the circulation pump 3, the first remote liquid level gauge 10, the acidity detector 20 and the liquid level automatic control valve 16 are all electrically connected to the DCS controller.

[0032] As needed, on each pipeline and equipment of the hydrogen chloride gas overflow treatment device, conventional valves, thermometers, pressure gauges, etc. well-known and commonly used in the art can also be provided according to production needs. The model of the DCS controller can be the CS3000 controller produced by Yokogawa Corporation of Japan.

[0033] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effects. Non-essential technical features can be increased or decreased according to actual needs to meet the requirements of different situations.

[0034] The usage process of the embodiment of the present utility model: First, close the liquid level automatic control valve 16, open the third ball valve 19, and supplement a certain level of water into the acid mist absorber 2 through the dilute hydrochloric acid circulation pipeline 6; then, close the second ball valve 18, and then open the liquid level automatic control valve 16 and the first ball valve 17 in sequence, and start the circulation pump 3 to establish a water circulation system for the acid mist absorber 2; then, send the hydrogen chloride gas volatilized from the hydrochloric acid storage tank 1 into the acid mist absorber 2 through the hydrogen chloride pipeline 4, and the hydrogen chloride gas reacts with water to form dilute hydrochloric acid; finally, according to the liquid level display of the acid mist absorber 2 and the dilute hydrochloric acid concentration display of the acidity detector 20, the DCS controller returns the generated dilute hydrochloric acid to the hydrochloric acid storage tank 1 again through the dilute hydrochloric acid pipeline 5.

Claims

1. A hydrogen chloride gas overflow treatment device, characterized in that It comprises a hydrochloric acid storage tank and an acid mist absorber. A hydrogen chloride pipeline is fixedly connected between the top outlet of the hydrochloric acid storage tank and the middle inlet of the acid mist absorber. A dilute hydrochloric acid pipeline is fixedly connected between the top inlet of the hydrochloric acid storage tank and the bottom outlet of the acid mist absorber. A dilute hydrochloric acid circulation pipeline is fixedly connected between the dilute hydrochloric acid pipeline and the upper inlet of the acid mist absorber.

2. The hydrogen chloride gas overflow treatment device according to claim 1, characterized in that A circulation pump is fixedly installed on the dilute hydrochloric acid pipeline between the acid mist absorber and the dilute hydrochloric acid circulation pipeline.

3. The hydrogen chloride gas overflow treatment device according to claim 2, characterized in that A field pressure gauge is fixedly installed on the dilute hydrochloric acid pipeline between the circulation pump and the dilute hydrochloric acid circulation pipeline, a water adding pipeline is fixedly connected to the dilute hydrochloric acid pipeline between the acid mist absorber and the circulation pump, and a second shower guide pipeline is fixedly connected to the dilute hydrochloric acid circulation pipeline.

4. The hydrogen chloride gas overflow treatment device according to claim 1, 2 or 3, characterized in that A packing layer is arranged in the acid mist absorber, and the packing layer is located between the upper inlet of the acid mist absorber and the middle inlet of the acid mist absorber.

5. The hydrogen chloride gas overflow treatment device according to claim 4, characterized in that A first remote liquid level meter, a first on-site liquid level meter and an acidity detector are fixedly arranged on the acid mist absorber below the packing layer.

6. The hydrogen chloride gas overflow treatment device according to claim 1, 2, 3 or 5, characterized in that A second remote liquid level gauge, a first on-site liquid level gauge and a remote temperature gauge are fixedly installed on the hydrochloric acid storage tank, and a first shower pipe is fixedly connected to the lower outlet of the hydrochloric acid storage tank.

7. The hydrogen chloride gas overflow treatment device according to claim 4, characterized in that A second remote liquid level gauge, a first on-site liquid level gauge and a remote temperature gauge are fixedly installed on the hydrochloric acid storage tank, and a first shower pipe is fixedly connected to the lower outlet of the hydrochloric acid storage tank.

8. The hydrogen chloride gas overflow treatment device according to claim 3, 5 or 7, characterized in that A liquid level automatic control valve is fixedly installed on the dilute hydrochloric acid pipeline between the water supply pipeline and the circulation pump, a first ball valve is fixedly installed on the dilute hydrochloric acid circulation pipeline between the dilute hydrochloric acid pipeline and the second shower pipeline, a second ball valve is fixedly installed on the dilute hydrochloric acid pipeline between the circulation pump and the hydrochloric acid storage tank, a third ball valve is fixedly installed on the water supply pipeline, and an interlock is arranged between the liquid level automatic control valve and the first remote liquid level meter and the acidity detector.

9. The hydrogen chloride gas overflow treatment device according to claim 6, characterized in that A liquid level automatic control valve is fixedly installed on the dilute hydrochloric acid pipeline between the water supply pipeline and the circulation pump, a first ball valve is fixedly installed on the dilute hydrochloric acid circulation pipeline between the dilute hydrochloric acid pipeline and the second shower pipeline, a second ball valve is fixedly installed on the dilute hydrochloric acid pipeline between the circulation pump and the hydrochloric acid storage tank, a third ball valve is fixedly installed on the water supply pipeline, and an interlock is arranged between the liquid level automatic control valve and the first remote liquid level meter and the acidity detector.

10. The hydrogen chloride gas overflow treatment device according to claim 9, characterized in that It also includes a DCS controller, and the circulating pump, the first remote liquid level meter, the acidity detector, and the liquid level automatic control valve are all electrically connected to the DCS controller.

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