CN212017333U - Anion polymerization reaction gas purification drying device - Google Patents
Anion polymerization reaction gas purification drying device Download PDFInfo
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- CN212017333U CN212017333U CN202020357494.XU CN202020357494U CN212017333U CN 212017333 U CN212017333 U CN 212017333U CN 202020357494 U CN202020357494 U CN 202020357494U CN 212017333 U CN212017333 U CN 212017333U
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Abstract
The utility model discloses a gaseous purification drying device of anion polymerization belongs to the chemical reaction device field. The purification drying device comprises a condensing chamber, two acid gas absorption towers and a water vapor absorption tower which are connected in series, and a gas collecting chamber. The condensing chamber is provided with the U-shaped condensing pipe, the water vapor collecting pipe and the condensate discharging pipe, so that the gas condensing area is increased, the condensing efficiency is improved, and water vapor can be discharged in time. The acid gas absorption tower and the water vapor absorption tower which are connected in series are respectively filled with an alkaline absorbent and a drying agent, so that deep drying of gas can be realized, and the requirement of anion polymerization is met; the water content of the gas flowing through the pipeline is detected by setting a water content threshold value of a dew point transmitter, and the water content is controlled below 1ppm so as to meet the requirement of the anionic polymerization reaction. In a word, the utility model provides a purification drying device simple structure, convenient operation, purification efficiency are high, are applicable to the laboratory and use the purification of anion polymerization gaseous raw materials pretreatment.
Description
Technical Field
The utility model belongs to anion polymerization gas purification field, concretely relates to gaseous purification drying device.
Background
The gas produced industrially often contains various impurities, particularly, water, acid gas and the like contained therein to lower the degree of polymerization of the product and even to cause the termination of the polymerization reaction. Therefore, the raw material gas must be purified before the polymerization reaction to reduce the content of impurities to the standard required for the polymerization reaction.
The existing method for purifying the anionic polymerization gas mainly adopts a molecular sieve and calcium hydride as purifying agents, but the molecular sieve has a strong catalytic decomposition effect on the gas, so that the content of organic impurities in the gas is increased, and hydrogen is introduced into the calcium hydride in the impurity removal process, thereby bringing potential safety hazards to the subsequent synthesis reaction.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an anion polymerization reaction gas purification drying device to solve the problem mentioned in the above-mentioned background art.
In order to solve the above problem, the utility model provides a following technical scheme: a gas purification and drying device for anion polymerization reaction comprises a condensing chamber, an absorption tower and a gas collecting chamber which are sequentially connected in series in the direction of gas flow, wherein the condensing chamber comprises a gas inlet pipe, a condensing drying box with a built-in U-shaped condensing pipe, a water vapor collecting pipe and a condensate discharging pipe; the gas inlet pipe, the U-shaped condensing pipe, the water vapor collecting pipe and the condensate discharging pipe are communicated with each other;
the absorption tower comprises an acid gas absorption tower, a water vapor absorption tower and a dew point transmitter; the acid gas absorption tower and the water vapor absorption tower are sequentially connected in series; the dew point transducer comprises two dew point transducers, one dew point transducer is arranged between the acid gas absorption tower and the water vapor absorption tower, and the other dew point transducer is arranged between the water vapor absorption tower and the gas collecting chamber.
Further, the condensation drying box is provided with a low-temperature adjusting device, and the temperature adjusting range of the low-temperature adjusting device is-50-0 ℃.
Furthermore, a condensate valve is arranged at the lower end of the U-shaped condensation pipe, and condensate flows into the water vapor collecting pipe by opening the condensate valve.
Further, the inside of the acid gas absorption tower is filled with an alkaline absorbent, and the inside of the water vapor absorption tower is filled with a drying agent.
Further, the alkaline absorbent is granular potassium hydroxide, the average pore diameter of the alkaline absorbent is 1-10nm, and the specific surface area is more than or equal to 150m2(ii)/g; the drying agent is a mixture of calcium oxide and aluminum oxide with the grain size of less than or equal to 30 mm.
Further, the dew point transmitter arranged between the acid gas absorption tower and the water vapor absorption tower is provided with a water content threshold value of 10ppm, and the dew point transmitter arranged between the water vapor absorption tower and the gas collection chamber is provided with a water content threshold value of 1 ppm; and when the corresponding dew point transmitter monitors that the water content of the passing gas is higher than a threshold value, prompting to replace the corresponding alkaline absorbent and/or desiccant.
Furthermore, a filter screen is arranged on an air outlet of the condensation drying box and an air inlet of the gas collecting chamber.
Compared with the prior art, the beneficial effects of the utility model are that: the anion polymerization reaction gas purification and drying device comprises a condensing chamber and two absorption towers, deep drying of gas is realized through multi-stage absorption, and interference of moisture and acid gas on anion polymerization reaction is reduced. The water vapor absorption tower with be equipped with on the connecting pipeline between the gas collecting chamber dew point transmitter, but real-time supervision flows through the gaseous water vapor content of pipeline, guarantees gas collecting chamber gas water content is below 1ppm, can satisfy anion polymerization's needs again when considering drying efficiency. The potassium hydroxide is used as an alkaline absorbent, so that acid gas can be effectively removed, smooth proceeding of anionic polymerization reaction is ensured, the polymerization degree of a product is improved, and meanwhile, the calcium oxide and the aluminum oxide are used as mixed drying agents, so that the drying efficiency is high, and new impurities can be effectively prevented from being introduced. In addition, the condensing chamber is provided with the U-shaped condensing pipe, so that the condensing area is increased, and the condensing efficiency is improved. The low-temperature adjusting device can also select the temperature adjusting range to adapt to the purification and drying of gases with different components. In a word, the utility model discloses the purification drying device that the structure provided simple structure, convenient operation, purification efficiency is high, is applicable to the purification of laboratory anion polymerization gas.
Drawings
FIG. 1 is a schematic diagram of the structure of the anion polymerization gas purification and drying apparatus provided by the present invention.
In the figure: 1-gas inlet pipe, 2-condensation drying box, 3-U-shaped condensation pipe, 4-vapor collecting pipe, 5-condensate discharging pipe, 6-acid gas absorption tower, 7-vapor absorption tower, 8-filter screen, 9-gas collecting chamber, and 10, 11-dew point transducer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Please refer to fig. 1, which is a schematic diagram of the structure of the anion polymerization gas purifying and drying apparatus provided by the present invention. The gas purification and drying device comprises a condensing chamber, an absorption tower and a gas collecting chamber which are sequentially connected in series through pipelines according to the airflow direction.
The condensing chamber comprises a gas inlet pipe 1, a condensing drying box 2 with a built-in U-shaped condensing pipe 3, a water vapor collecting pipe 4 and a condensate discharging pipe 5. The gas inlet pipe 1, the U-shaped condensing pipe 3, the water vapor collecting pipe 4 and the condensate discharging pipe 5 are communicated in sequence. In the specific embodiment, a plurality of mutually communicated U-shaped condensation pipes 3 are arranged in the condensation drying box 2, the lower ends of the U-shaped condensation pipes 3 are provided with condensate valves (not shown) and are communicated with the vapor collecting pipe 4, and condensate flows into the vapor collecting pipe 4 by opening the condensate valves (not shown). The lower end of the condensate discharge pipe 5 is also provided with a discharge valve, so that condensate can be conveniently discharged. U type condenser pipe 3 has increased the condensation area, has improved condensation efficiency. Preferably, the condensation drying box 2 is equipped with a low temperature adjusting device (not shown), the temperature adjusting range of the low temperature adjusting device (not shown) is-50 ℃ to 0 ℃, the temperature in the condensation drying box 2 can be adjusted according to the drying standards required by different reactions for gas, and the moisture and other impurities in the gas can be removed. In one embodiment, the cryogenic conditioning device (not shown) is similar to a refrigerator compressor. A filter screen (not shown) is arranged at an air outlet of the condensation drying box 2 and used for removing dust and other micro particles in the gas and reducing the influence of trace impurities on the gas synthesis reaction.
The absorption tower comprises an acid gas absorption tower 6 and a water vapor absorption tower 7 which are sequentially connected in series. The acid gas absorption tower 6 is filled with alkaline absorbent, preferably granular potassium hydroxide, which can effectively absorb acid gas, and has average pore diameter of 1-10nm and specific surface area of 150m or more2(ii) in terms of/g. The moisture absorption tower 7 is filled with a desiccant. Preferably, the drying agent is a mixture of calcium oxide and aluminum oxide with the particle size of less than or equal to 30mm, so that the drying efficiency is high, and simultaneously, new impurities can be prevented from being introduced. The selection of the particle sizes of the alkaline absorbent and the drying agent is obtained through a plurality of tests, so that the gas flow is not influenced, the contact area of the gas and the drying agent can be increased, the drying efficiency is considered, and the drying effect is ensured. In addition, the gas inlet and outlet modes of the acid gas absorption tower 6 and the water vapor absorption tower 7 are downward inlet and upward outlet, so that the gas is fully contacted with the alkaline absorbent and the drying agent, and the drying and purifying effects are better.
Further, the gas purification drying device further comprises a dew point transmitter 10 and a dew point transmitter 11, wherein the dew point transmitter 10 is arranged between the acid gas absorption tower 6 and the water vapor absorption tower 7, and the dew point transmitter 11 is arranged between the water vapor absorption tower 7 and the gas collection chamber 9. The water content threshold value set by the dew point transmitter 10 is 10ppm, and the water content threshold value set by the dew point transmitter 11 is 1ppm so as to meet the characteristic that anion polymerization is sensitive to water; when the two dew point transmitters detect that the water content is higher than the threshold value, the efficiency of the absorbent is reduced, and the corresponding alkaline absorbent and/or the corresponding drying agent need to be replaced in time. In a specific implementation mode, an electronic alarm can be arranged to automatically give an alarm when the water content is higher than a threshold value, and information can be obtained by manually observing the reading.
The air inlet of the gas collection chamber 9 is provided with a filter screen 8 for removing dust and other micro particles in the gas and reducing the influence of trace impurities on the gas synthesis reaction. In a specific embodiment, a filter screen can be arranged at the gas outlet of the gas purifier to further remove trace impurities in the gas.
In the concrete embodiment, the utility model provides a gaseous purification drying device of anion polymerization's principle does:
synthetic gas enters a U-shaped condensing pipe 3 of a condensing and drying box 2 through a gas inlet pipe 1;
setting the temperature in the condensation drying box 2 to be-30 ℃, gradually condensing water vapor and other impurities in the synthesis gas in the U-shaped condensation pipe 3, entering a water vapor collecting pipe 4 through a condensate valve (not shown) at the lower part of the U-shaped condensation pipe 3, and then discharging the water vapor and other impurities through a condensate discharging pipe 5;
the residual gas dried by the condensing chamber enters an acid gas absorption tower 6, wherein the acid gas in the gas is absorbed by the filled alkaline absorbent, namely granular potassium hydroxide;
the gas passing through the acid gas absorption tower 6 enters a water vapor absorption tower 7, and the drying agents, namely calcium oxide and aluminum oxide, filled in the water vapor absorption tower absorb the moisture in the gas;
the dew point transmitter 10 monitors the moisture content of the gas flowing through the pipeline between the acid gas absorption tower 6 and the water vapor absorption tower 7, and when the moisture content is higher than a water content threshold value of-10 ppm set by the dew point transmitter 10, the efficiency of the alkaline absorbent is reduced, and the alkaline absorbent needs to be replaced in time. Similarly, the dew point transmitter 11 monitors the moisture content of the gas flowing through the pipeline between the water vapor absorption tower 7 and the gas collection chamber 9, and when the moisture content is higher than a moisture content threshold value-1 ppm set by the dew point transmitter 11, the efficiency of the drying agent is reduced and the drying agent needs to be replaced in time;
until the water content in the gas is lower than 1ppm, the gas enters a gas collection chamber 9 after passing through a filter screen 8, and then the purified and dried gas is collected from a gas outlet of the gas collection chamber 9.
The above detailed description of the embodiments of the present invention is only exemplary, and the present invention is not limited to the above described embodiments. It will be apparent to those skilled in the art that any equivalent modifications or substitutions can be made to the present invention without departing from the spirit and scope of the invention, and therefore, all equivalent changes, modifications, improvements, etc. made without departing from the spirit and scope of the invention are intended to be covered by the scope of the invention.
Claims (7)
1. A gas purification and drying device for anionic polymerization reaction comprises a condensation chamber, an absorption tower and a gas collection chamber which are sequentially connected in series through pipelines according to the direction of gas flow, and is characterized in that the condensation chamber comprises a gas inlet pipe, a condensation drying box with a built-in U-shaped condensation pipe, a water vapor collecting pipe and a condensate discharging pipe; the gas inlet pipe, the U-shaped condensing pipe, the water vapor collecting pipe and the condensate discharging pipe are communicated with each other;
the absorption tower comprises an acid gas absorption tower, a water vapor absorption tower and a dew point transmitter; the acid gas absorption tower and the water vapor absorption tower are sequentially connected in series; the dew point transducer comprises two dew point transducers, one dew point transducer is arranged between the acid gas absorption tower and the water vapor absorption tower, and the other dew point transducer is arranged between the water vapor absorption tower and the gas collecting chamber.
2. The apparatus for purifying and drying anionic polymerization reaction gas as recited in claim 1, further comprising: the condensation drying box is provided with a low-temperature adjusting device, and the temperature adjusting range of the low-temperature adjusting device is-50-0 ℃.
3. The apparatus for purifying and drying anionic polymerization reaction gas as recited in claim 1, further comprising: and a condensate valve is arranged at the lower end of the U-shaped condensing pipe, and condensate flows into the water vapor collecting pipe by opening the condensate valve.
4. The apparatus for purifying and drying anionic polymerization reaction gas as recited in claim 1, further comprising: the acid gas absorption tower is filled with an alkaline absorbent, and the water vapor absorption tower is filled with a drying agent.
5. The apparatus for purifying and drying anionic polymerization reaction gas as recited in claim 4, further comprising: the alkaline absorbent is granular potassium hydroxide with an average pore diameter of 1-10nm and a specific surface of not less than 150m2(ii)/g; the drying agent has particle sizeA mixture of calcium oxide and alumina of less than or equal to 30 mm.
6. The apparatus for purifying and drying anionic polymerization reaction gas as recited in claim 4, further comprising: the dew point transmitter arranged between the acid gas absorption tower and the water vapor absorption tower is provided with a water content threshold value of 10 ppm; the dew point transmitter arranged between the water vapor absorption tower and the gas collection chamber is provided with a water content threshold value of 1 ppm; and when the corresponding dew point transmitter monitors that the water content of the gas flowing through the pipeline is higher than a threshold value, prompting to replace the corresponding alkaline absorbent and/or desiccant.
7. The apparatus for purifying and drying anionic polymerization reaction gas as recited in claim 1, further comprising: and a filter screen is arranged at the air outlet of the condensation drying box and the air inlet of the gas collecting chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020357494.XU CN212017333U (en) | 2020-03-19 | 2020-03-19 | Anion polymerization reaction gas purification drying device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020357494.XU CN212017333U (en) | 2020-03-19 | 2020-03-19 | Anion polymerization reaction gas purification drying device |
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| CN212017333U true CN212017333U (en) | 2020-11-27 |
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| CN202020357494.XU Expired - Fee Related CN212017333U (en) | 2020-03-19 | 2020-03-19 | Anion polymerization reaction gas purification drying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113289487A (en) * | 2021-05-24 | 2021-08-24 | 承德石油高等专科学校 | Chemical acidic tail gas treatment system |
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2020
- 2020-03-19 CN CN202020357494.XU patent/CN212017333U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113289487A (en) * | 2021-05-24 | 2021-08-24 | 承德石油高等专科学校 | Chemical acidic tail gas treatment system |
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Granted publication date: 20201127 |