Chlor-alkali chemical waste chlorine recycling device

Abstract

The utility model relates to the technical field of chlorine treatment, in particular to a chlor-alkali chemical waste chlorine recycling device which comprises a waste chlorine distribution table, a chlorine washing tower, a chlorine cooler, a chlorine water mist catcher, a chlorine drying tower and a chlorine compressor. A chlorine conveying pipeline communicated with an outlet of the waste chlorine distribution table is fixedly communicated with a chlorine washing tower, a chlorine cooler, a chlorine water mist catcher, a chlorine drying tower and a chlorine compressor in sequence, an outlet of the chlorine compressor is fixedly communicated with an original chlorine system pipeline, and a sealing gas pipeline outlet of the chlorine compressor is fixedly communicated with the original chlorine system pipeline. The waste chlorine recycling device is reasonable and compact in structure and convenient to use, waste chlorine is distinguished according to the temperature and the drying degree and then recycled to an original chlorine system for synthesis of hydrogen chloride, and the problems that when sodium hypochlorite is not marketed, the waste chlorine storage amount is large, and production load increase is affected are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of waste chlorine gas recycling devices of chlor-alkali chemical industry, and a kind of waste chlorine gas recycling device of chlor-alkali chemical industry. BACKGROUND

[0002] There are two main methods for industrial production of hydrogen chloride: sodium chloride ore method and chlor-alkali industrial production method. In the process of chlor-alkali chemical production of hydrogen chloride, chlorine is divided into two kinds: raw chlorine and waste chlorine. Raw chlorine is used to synthesize hydrogen chloride, and waste chlorine is used to produce sodium hypochlorite in sodium hypochlorite production device. The main sources of waste chlorine include chlorine water tank gas phase pipeline, chlorate decomposition tank gas phase pipeline, and sealing gas pipeline of chlorine compressor.

[0003] Due to the influence of the market on the sale of sodium hypochlorite, when sodium hypochlorite is in a state of sluggish sales, the inventory of sodium hypochlorite will affect the improvement of the device load in the chlor-alkali production process.

[0004] Therefore, it is necessary to study and invent a waste chlorine gas recycling device to solve the problem of large amount of waste chlorine gas storage affecting the improvement of production load. SUMMARY

[0005] The utility model provides a kind of waste chlorine gas recycling devices of chlor-alkali chemical industry, overcome the above prior art deficiency, it can effectively solve the problem of large amount of waste chlorine gas storage affecting the improvement of production load when existing sodium hypochlorite inventory in the process of chlor-alkali chemical production.

[0006] The technical scheme of the utility model is realized by the following measures: a kind of waste chlorine gas recycling devices of chlor-alkali chemical industry, including waste chlorine gas distribution platform, chlorine scrubber, chlorine cooler, chlorine water mist collector, chlorine drying tower, chlorine compressor, waste chlorine gas distribution platform first inlet is fixedly connected with first chlorine input pipeline, waste chlorine gas distribution platform second inlet is fixedly connected with second chlorine input pipeline, waste chlorine gas distribution platform first outlet and chlorine scrubber middle part inlet between fixedly connected with first chlorine conveying pipeline, chlorine scrubber top outlet and chlorine cooler top inlet between fixedly connected with second chlorine conveying pipeline, chlorine cooler lower part outlet and chlorine water mist collector lower part inlet between fixedly connected with third chlorine conveying pipeline, chlorine water mist collector top outlet and chlorine drying tower lower part inlet between fixedly connected with fourth chlorine conveying pipeline, chlorine drying tower top outlet and chlorine compressor inlet between fixedly connected with fifth chlorine conveying pipeline, chlorine compressor outlet is fixedly connected with raw chlorine system pipeline, wherein, chlorine compressor is also fixedly connected with sealing gas pipeline, sealing gas pipeline outlet is fixedly connected with fifth chlorine conveying pipeline.

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

[0008] The first waste chlorine gas output pipeline is fixedly communicated with the second outlet of the waste chlorine gas distribution table.

[0009] The first chlorine gas conveying pipeline is fixedly communicated with the original chlorine gas pipeline.

[0010] The washing liquid pipeline and the sulfuric acid pipeline are fixedly installed with a washing liquid circulating pump and a sulfuric acid circulating pump respectively.

[0011] The washing liquid pipeline and the sulfuric acid pipeline are fixedly installed with a washing liquid circulating pump and a sulfuric acid circulating pump respectively.

[0012] The washing liquid pipeline and the sulfuric acid pipeline are fixedly installed with a washing liquid circulating pump and a sulfuric acid circulating pump respectively.

[0013] The waste chlorine gas distribution table is fixedly provided with a remote pressure gauge.

[0014] The washing liquid pipeline between the washing liquid branch pipeline and the washing liquid cooling pipeline is fixedly provided with a first valve, the sulfuric acid pipeline between the sulfuric acid branch pipeline and the sulfuric acid cooling pipeline is fixedly provided with a second valve, the first chlorine gas input pipeline, the second chlorine gas input pipeline, the first waste chlorine gas output pipeline and the first chlorine gas conveying pipeline are respectively fixedly provided with a third valve, a fourth valve, a fifth valve and a sixth valve, the second waste chlorine gas output pipeline is fixedly provided with a seventh valve, and the sealing gas pipeline between the second waste chlorine gas output pipeline and the fourth chlorine gas conveying pipeline is fixedly provided with an eighth valve.

[0015] The waste chlorine gas is recovered to the original chlorine gas system according to temperature and drying degree, and is used for synthesizing hydrogen chloride, so that when sodium hypochlorite is not sold, the waste chlorine gas storage is large, and the production load is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0016] ATTACHED Figure 1 The utility model process flow schematic diagram is for the utility model.

[0017] ATTACHED Figure 1The codes in the figure are as follows: 1 is a waste chlorine distribution table, 2 is a chlorine washing tower, 3 is a chlorine cooler, 4 is a chlorine water mist catcher, 5 is a chlorine drying tower, 6 is a chlorine compressor, 7 is a first chlorine input pipeline, 8 is a second chlorine input pipeline, 9 is a first chlorine conveying pipeline, 10 is a second chlorine conveying pipeline, 11 is a third chlorine conveying pipeline, 12 is a fourth chlorine conveying pipeline, 13 is a fifth chlorine conveying pipeline, 14 is an original chlorine system pipeline, 15 is a sealing gas pipeline, 16 is a first waste chlorine output pipeline, 17 is a second waste chlorine output pipeline, 18 is an original chlorine pipeline, 19 is a washing liquid pipeline, 20 is a sulfuric acid pipeline, 21 is a washing liquid circulating pump, 22 is a sulfuric acid circulating pump, 23 is a washing liquid cooler, 24 is a sulfuric acid cooler, 25 is a washing liquid branch pipeline, 26 is a washing liquid cooling pipeline, 27 is a sulfuric acid branch pipeline, 28 is a sulfuric acid cooling pipeline, 29 is a remote pressure gauge, 30 is a first valve, 31 is a second valve, 32 is a third valve, 33 is a fourth valve, 34 is a fifth valve, 35 is a sixth valve, 36 is a seventh valve, and 37 is an eighth valve. DETAILED DESCRIPTION

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

[0019] In the utility model, if no special description, the equipment, device used are the prior art known common equipment, device in the field.

[0020] In the utility model, in order to be convenient for description, the relative position relation of each component is all described according to the drawing mode of the attached drawing of the specification, for example: the position relation of front, back, top, bottom, left, right is determined according to the drawing direction of the attached drawing of the specification. Figure 1 Figure 1

[0021] The utility model will be further described below in combination with examples and drawings:

[0022] Example 1: as attached Figure 1 ​​As shown, the waste chlorine gas recycling device for chlor-alkali chemical industry comprises a waste chlorine gas distribution table 1, a chlorine gas washing tower 2, a chlorine gas cooler 3, a chlorine gas water mist catcher 4, a chlorine gas drying tower 5, and a chlorine gas compressor 6. The first inlet of the waste chlorine gas distribution table 1 is fixedly connected with a first chlorine gas input pipeline 7. The second inlet of the waste chlorine gas distribution table 1 is fixedly connected with a second chlorine gas input pipeline 8. The first outlet of the waste chlorine gas distribution table 1 is fixedly connected with the middle inlet of the chlorine gas washing tower 2 through a first chlorine gas conveying pipeline 9. The top outlet of the chlorine gas washing tower 2 is fixedly connected with the top inlet of the chlorine gas cooler 3 through a second chlorine gas conveying pipeline 10. The lower outlet of the chlorine gas cooler 3 is fixedly connected with the lower inlet of the chlorine gas water mist catcher 4 through a third chlorine gas conveying pipeline 11. The top outlet of the chlorine gas water mist catcher 4 is fixedly connected with the lower inlet of the chlorine gas drying tower 5 through a fourth chlorine gas conveying pipeline 12. The top outlet of the chlorine gas drying tower 5 is fixedly connected with the inlet of the chlorine gas compressor 6 through a fifth chlorine gas conveying pipeline 13. The outlet of the chlorine gas compressor 6 is fixedly connected with an original chlorine system pipeline 14. The chlorine gas compressor 6 is further fixedly connected with a sealing gas pipeline 15, and the outlet of the sealing gas pipeline 15 is fixedly connected with the fifth chlorine gas conveying pipeline 13.

[0023] The recycling of waste chlorine gas is divided into two parts: waste chlorine gas with high water content and waste chlorine gas with low water content. The chlorine gas in the chlorate decomposition tank and the chlorine water tank has high temperature and high water content, and is respectively introduced into the waste chlorine gas distribution table 1 through the first chlorine gas input pipeline 7 and the second chlorine gas input pipeline 8. The waste chlorine gas with high water content is washed by the chlorine gas washing tower 2, and then is cooled and dehydrated by the chlorine gas cooler 3, the chlorine gas water mist catcher 4 and the chlorine gas drying tower 5. The sealing gas of the chlorine gas compressor 6 has low water content, and is introduced into the fourth chlorine gas conveying pipeline 12 through the sealing gas pipeline 15 of the chlorine gas compressor 6 and then into the chlorine gas drying tower 5.

[0024] The waste chlorine gas is recycled and utilized by classification, and the waste chlorine gas with different water content and temperature is recycled to different positions of the device, so that the stable production of the device is not affected when the waste chlorine gas enters the original chlorine system.

[0025] The waste chlorine gas recycling device for chlor-alkali chemical industry can be further optimized or / and improved according to actual needs.

[0026] Embodiment 2 differs from embodiment 1 in that, as shown in Figure 1 the waste chlorine gas distribution table 1 is fixedly connected with a first waste chlorine gas output pipeline 16. The sealing gas pipeline 15 and the first waste chlorine gas output pipeline 16 are fixedly connected with a first waste chlorine gas pipeline 17.

[0027] Embodiment 3 differs from embodiments 1 to 2 in that, as shown in Figure 1 the first chlorine gas conveying pipeline 9 is fixedly connected with an original chlorine gas pipeline 18.

[0028] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1 As shown, a washing liquid pipeline 19 is fixedly connected between the lower outlet of chlorine scrubbing tower 2 and the upper inlet of chlorine scrubbing tower 2, and a sulfuric acid pipeline 20 is fixedly connected between the lower outlet of chlorine drying tower 5 and the upper inlet of chlorine drying tower 5.

[0029] Example 5: It differs from Examples 1 to 4 in that, as shown in the appendix... Figure 1 As shown, a washing liquid circulation pump 21 and a sulfuric acid circulation pump 22 are fixedly installed on the washing liquid pipeline 19 and the sulfuric acid pipeline 20, respectively.

[0030] Example 6: Its difference from Examples 1 to 5 is as follows: (See attached) Figure 1 As shown, it also includes a washing liquid cooler 23 and a sulfuric acid cooler 24. A washing liquid branch line 25 is fixedly connected between the inlet of the washing liquid cooler 23 and the washing liquid circulation pump 21 and the outlet of the washing liquid pipeline 19. A washing liquid cooling line 26 is fixedly connected between the outlet of the washing liquid cooler 23 and the washing liquid branch line 25 and the outlet of the washing liquid pipeline 19. A sulfuric acid branch line 27 is fixedly connected between the inlet of the sulfuric acid cooler 24 and the sulfuric acid circulation pump 22 and the outlet of the sulfuric acid pipeline 20. A sulfuric acid cooling line 28 is fixedly connected between the outlet of the sulfuric acid cooler 24 and the sulfuric acid branch line 27 and the outlet of the sulfuric acid pipeline 20.

[0031] Example 7: Its difference from Examples 1 to 6 is as follows: (See attached) Figure 1 As shown, a remote pressure gauge 29 is fixedly installed on the waste chlorine gas distribution table 1.

[0032] Example 8: It differs from Examples 1 to 7 in that: as shown in the appendix Figure 1 As shown, a first valve 30 is fixedly installed on the washing liquid pipeline 19 between the washing liquid branch pipeline 25 and the washing liquid cooling pipeline 26; a second valve 31 is fixedly installed on the sulfuric acid pipeline 20 between the sulfuric acid branch pipeline 27 and the sulfuric acid cooling pipeline 28; a third valve 32, a fourth valve 33, a fifth valve 34, and a sixth valve 35 are fixedly installed on the first chlorine gas input pipeline 7, the second chlorine gas input pipeline 8, the first waste chlorine gas output pipeline 16, and the first chlorine gas transmission pipeline 9, respectively; a seventh valve 36 is fixedly installed on the first waste chlorine gas pipeline 17; and an eighth valve 37 is fixedly installed on the sealing gas pipeline 15 between the first waste chlorine gas pipeline 17 and the fourth chlorine gas transmission pipeline 12.

[0033] According to the need, the waste chlorine gas entering the waste chlorine gas distribution platform 1 is switched between the first waste chlorine gas output pipeline 16 or the original chlorine gas pipeline 18 to the chlorine gas washing tower 2 by opening and closing the fifth valve 34 and the sixth valve 35; the sealing gas of the chlorine gas compressor 6 can be switched to the fourth chlorine gas conveying pipeline 12 to enter the chlorine gas drying tower 5 through the second waste chlorine gas output pipeline 17 and the first waste chlorine gas output pipeline 16 or the eighth valve 37, so that the sealing gas of the chlorine gas compressor 6 enters the original chlorine system.

[0034] According to the need, the pipelines and equipment of the chlorine-alkali chemical waste chlorine gas recycling device can be provided with conventional valves, thermometers and pressure gauges and the like commonly known in the art according to the production needs.

[0035] The above technical features respectively constitute embodiments of the present application, have strong adaptability and implementation effects, and can increase or reduce unnecessary technical features according to actual needs to meet the needs of different situations.

[0036] The use process of the embodiment of the utility model is as follows: firstly, the temperature and the water content of the chlorate decomposition tank chlorine gas and the chlorine water tank chlorine gas are collected into the waste chlorine gas distribution platform 1 to form mixed waste chlorine gas; then, the mixed waste chlorine gas is sequentially subjected to the common action of the chlorine gas washing tower 2, the chlorine gas cooler 3, the chlorine gas water mist collector 4, the chlorine gas drying tower 5 and the chlorine gas compressor 6 to obtain dry chlorine gas; finally, the dry chlorine gas enters the original chlorine system pipeline 14 and is incorporated into the original chlorine system to synthesize hydrogen chloride.

Claims

1. A chlor-alkali chemical waste chlorine gas recycling device, characterized in that The first inlet of the waste chlorine distribution platform is fixedly connected with a first chlorine input pipeline, the second inlet of the waste chlorine distribution platform is fixedly connected with a second chlorine input pipeline, the first outlet of the waste chlorine distribution platform is fixedly connected with a first chlorine conveying pipeline between the middle inlet of the chlorine washing tower, the top outlet of the chlorine washing tower is fixedly connected with a second chlorine conveying pipeline between the top inlet of the chlorine cooler, the lower outlet of the chlorine cooler is fixedly connected with a third chlorine conveying pipeline between the lower inlet of the chlorine water mist catcher, the top outlet of the chlorine water mist catcher is fixedly connected with a fourth chlorine conveying pipeline between the lower inlet of the chlorine drying tower, the top outlet of the chlorine drying tower is fixedly connected with a fifth chlorine conveying pipeline between the inlet of the chlorine compressor, and the outlet of the chlorine compressor is fixedly connected with a raw chlorine system pipeline.

2. The chlor-alkali chemical waste chlorine gas recycling device according to claim 1, characterized in that The second outlet of the waste chlorine distribution platform is fixedly connected with a first waste chlorine output pipeline, and the sealing gas pipeline is fixedly connected with a second waste chlorine output pipeline between the first waste chlorine output pipeline.

3. The chlor-alkali chemical waste chlorine gas recycling device according to claim 1 or 2, characterized in that A raw chlorine pipeline is fixedly connected on the first chlorine conveying pipeline.

4. The chlor-alkali chemical waste chlorine gas recycling device according to claim 1 or 2, characterized in that A washing liquid pipeline is fixedly connected between the lower outlet of the chlorine washing tower and the upper inlet of the chlorine washing tower, and a sulfuric acid pipeline is fixedly connected between the lower outlet of the chlorine drying tower and the upper inlet of the chlorine drying tower.

5. The chlor-alkali chemical waste chlorine gas recycling device according to claim 3, characterized in that A washing liquid pipeline is fixedly connected between the lower outlet of the chlorine washing tower and the upper inlet of the chlorine washing tower, and a sulfuric acid pipeline is fixedly connected between the lower outlet of the chlorine drying tower and the upper inlet of the chlorine drying tower.

6. The chlor-alkali chemical waste chlorine gas recycling device according to claim 5, characterized in that A washing liquid circulating pump and a sulfuric acid circulating pump are fixedly installed on the washing liquid pipeline and the sulfuric acid pipeline respectively.

7. The chlor-alkali chemical waste chlorine gas recycling device according to claim 6, characterized in that A washing liquid cooler and a sulfuric acid cooler are further included, a washing liquid branch pipeline is fixedly connected between the inlet of the washing liquid cooler, the washing liquid circulating pump and the washing liquid pipeline outlet, a washing liquid cooling pipeline is fixedly connected between the outlet of the washing liquid cooler, the washing liquid branch pipeline and the washing liquid pipeline outlet, a sulfuric acid branch pipeline is fixedly connected between the inlet of the sulfuric acid cooler, the sulfuric acid circulating pump and the sulfuric acid pipeline outlet, and a sulfuric acid cooling pipeline is fixedly connected between the outlet of the sulfuric acid cooler, the sulfuric acid branch pipeline and the sulfuric acid pipeline outlet.

8. The chlor-alkali chemical waste chlorine gas recycling device according to claim 1 or 2 or 5 or 6, characterized in that A remote pressure gauge is fixedly arranged on the waste chlorine distribution platform.

9. The chlor-alkali chemical waste chlorine gas recycling device according to claim 7, characterized in that A remote pressure gauge is fixedly arranged on the waste chlorine distribution platform.

10. The chlor-alkali chemical waste chlorine gas recycling device according to claim 2 or 5 or 6 or 7 or 9, characterized in that A first valve is fixedly arranged on the washing liquid pipeline between the washing liquid branch pipeline and the washing liquid cooling pipeline, a second valve is fixedly arranged on the sulfuric acid pipeline between the sulfuric acid branch pipeline and the sulfuric acid cooling pipeline, a third valve, a fourth valve, a fifth valve and a sixth valve are fixedly arranged on the first chlorine input pipeline, the second chlorine input pipeline, the first waste chlorine output pipeline and the first chlorine conveying pipeline respectively, a seventh valve is fixedly arranged on the second waste chlorine output pipeline, and an eighth valve is fixedly arranged on the sealing gas pipeline between the second waste chlorine output pipeline and the fourth chlorine conveying pipeline.

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