CN215250508U - Hexafluoroethane crude gas dewatering device - Google Patents
Hexafluoroethane crude gas dewatering device Download PDFInfo
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- CN215250508U CN215250508U CN202121523664.8U CN202121523664U CN215250508U CN 215250508 U CN215250508 U CN 215250508U CN 202121523664 U CN202121523664 U CN 202121523664U CN 215250508 U CN215250508 U CN 215250508U
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Abstract
The utility model discloses a hexafluoroethane crude gas water trap, it relates to gaseous water trap technical field. The device comprises a drying mechanism for dewatering and drying crude hexafluoroethane gas by using a calcium chloride solution, wherein the gas outlet end of the drying mechanism is communicated with a gas-liquid separator for performing gas-liquid separation on dried gas, and the drying mechanism is sequentially communicated with a brine concentration tank, a brine recovery tank and a brine tank to form a calcium chloride solution water circulation loop. After the technical scheme is adopted, the utility model discloses an this beneficial effect does: the drying mechanism is used for drying the crude hexafluoroethane gas by using a calcium chloride solution, and compared with the anhydrous calcium chloride, the drying mechanism is lower in price and is more economic; the dewatering and drying effects are good, the efficiency is higher, and the phenomenon of condensation and crystallization cannot occur; the concentration of the circulating calcium chloride solution is ensured by the brine concentration tank, and the calcium chloride solution can be recycled.
Description
Technical Field
The utility model relates to a gaseous water trap technical field, concretely relates to hexafluoroethane crude gas water trap.
Background
In the industrial production process of hexafluoroethane, a gas water removal process is involved, and moisture in the gas often has important influence on the transportation, quality and the like of the gas. The dehydration and drying process of the gas is comprehensively selected according to different gas characteristics, physical properties under different working conditions and process indexes of dehydration and drying. The correct selection of the gas dehydration drying process not only ensures the safe and stable operation of the production device, but also can reduce the water content of the product and improve the product quality. Therefore, it is important to select a proper drying and dewatering device. At present, the dehydration process which is widely applied at home and abroad and has mature technology comprises a cooling separation method, a solvent absorption method and a solid absorption method.
Anhydrous calcium chloride is a white porous block, granular or honeycomb solid, and is a commonly used desiccant. The calcium chloride solution has similar characteristics with anhydrous calcium chloride, and the price of industrial calcium chloride is about 35 percent of the anhydrous calcium chloride. The existing water removal device adopts anhydrous calcium chloride, is expensive and high in cost, has poor water removal effect, cannot be recycled, and causes waste.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a hexafluoroethane crude gas dewatering device aiming at the defects and shortcomings of the prior art, the calcium chloride solution is used for drying through the drying mechanism to dewater and dry hexafluoroethane crude gas, and the price is lower and more economical compared with the use of anhydrous calcium chloride; the concentration and the temperature of the calcium chloride solution in the drying mechanism and the pressure of the hexafluoroethane crude gas are ensured to be in the optimal dewatering value, the dewatering and drying effects are good, the efficiency is higher, and the phenomenon of condensation and crystallization cannot occur; when the concentration of the calcium chloride solution is reduced, the concentration of the circulating calcium chloride solution is ensured by the brine concentration tank, and the calcium chloride solution can be recycled.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a hexafluoroethane crude gas dewatering device comprises a drying mechanism for dewatering and drying hexafluoroethane crude gas by using a calcium chloride solution, wherein a gas outlet end of the drying mechanism is communicated with a gas-liquid separator for performing gas-liquid separation on the dried gas, a liquid outlet of the gas-liquid separator is communicated with a return port of the drying mechanism to form a circulation loop, a gas outlet of the gas-liquid separator is communicated with a compressed gas reservoir, and the compressed gas reservoir is communicated with a compressed gas dryer; the drying mechanism is sequentially communicated with a brine concentration tank, a brine recovery tank and a brine tank to form a calcium chloride solution water circulation loop.
The further improvement is that: the drying mechanism comprises a first drying tower, a first drying tower circulating cooler, a second drying tower and a second drying tower circulating cooler,
the first drying tower, the brine concentration tank, the brine recovery tank and the brine tank are sequentially communicated to form a liquid circulation loop, the first drying tower is communicated with a first drying tower circulating cooler to form a calcium chloride solution cooling circulation loop, and a gas outlet of the first drying tower is communicated with a gas inlet of a second drying tower;
the second drying tower, the brine concentration tank, the brine recovery tank and the brine tank are sequentially communicated to form a liquid circulation loop, the second drying tower is communicated with a second drying tower circulating cooler to form a calcium chloride solution cooling circulation loop, and a gas outlet of the second drying tower is communicated with a gas-liquid separator;
the first drying tower circulating cooler and the second drying tower circulating cooler are used for cooling calcium chloride solutions in the first drying tower and the second drying tower to avoid input gas condensation to influence the dewatering effect; the brine concentration tank is used for concentrating the circulating calcium chloride solution to enable the calcium chloride solution in the first drying tower and the calcium chloride solution in the second drying tower to be at the optimal water removal concentration.
The further improvement is that: the brine concentration tank is communicated with an evaporation liquid cooler for cooling the calcium chloride solution in the brine concentration tank, and the evaporation liquid cooler is communicated with a condensed water collecting tank.
The further improvement is that: the gas input end of the first drying tower is communicated with a compressor, and the compressor is used for performing primary compression on input hexafluoroethane crude gas to facilitate drying and dewatering by a drying mechanism.
The further improvement is that: the first drying tower and the second drying tower are respectively provided with a plurality of thermometers, and the thermometers are used for detecting the temperatures in the first drying tower and the second drying tower in real time to ensure that the calcium chloride solution in the first drying tower and the second drying tower is at the optimal water absorption temperature.
The further improvement is that: the first drying tower and the second drying tower are respectively provided with a plurality of solubility meters, and the solubility meters are used for detecting the concentration of the calcium chloride solution in the first drying tower and the concentration of the calcium chloride solution in the second drying tower in real time to ensure that the calcium chloride solution in the first drying tower and the calcium chloride solution in the second drying tower are in the best water absorption concentration.
The further improvement is that: the first drying tower and the second drying tower are respectively provided with a plurality of pressure gauges, and the pressure gauges are used for detecting the pressure of gas in the first drying tower and the second drying tower in real time, so that the optimal dewatering temperature of the calcium chloride solution can be conveniently determined according to the pressure.
After adopting above-mentioned technical scheme, compare in prior art and have following beneficial effect: the drying mechanism is used for drying the crude hexafluoroethane gas by using a calcium chloride solution, and compared with the anhydrous calcium chloride, the drying mechanism is lower in price and is more economic; the concentration and the temperature of the calcium chloride solution in the drying mechanism and the pressure of the hexafluoroethane crude gas are ensured to be in the optimal dewatering value, the dewatering and drying effects are good, the efficiency is higher, and the phenomenon of condensation and crystallization cannot occur; when the concentration of the calcium chloride solution is reduced, the concentration of the circulating calcium chloride solution is ensured by the brine concentration tank, and the calcium chloride solution can be recycled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals: the system comprises a first drying tower 1, a first drying tower circulating cooler 2, a second drying tower 3, a second drying tower circulating cooler 4, a gas-liquid separator 5, a compressed gas storage 6, a brine recovery tank 7, a brine tank 8, a brine concentration tank 9, an evaporative liquid cooler 10 and a condensed water collecting tank 11.
Detailed Description
Referring to fig. 1, the technical solution adopted by the present embodiment is: a hexafluoroethane crude gas dewatering device comprises a drying mechanism for dewatering and drying hexafluoroethane crude gas by using a calcium chloride solution, wherein the gas outlet end of the drying mechanism is communicated with a gas-liquid separator 5 for performing gas-liquid separation on the dried gas, the liquid outlet of the gas-liquid separator 5 is communicated with the return port of the drying mechanism to form a circulation loop, the gas outlet of the gas-liquid separator 5 is communicated with a compressed gas storage 6, and the compressed gas storage 6 is communicated with a compressed gas dryer; the drying mechanism is sequentially communicated with a brine concentration tank 9, a brine recovery tank 7 and a brine tank 8 to form a calcium chloride solution water circulation loop.
Wherein the drying mechanism comprises a first drying tower 1, a first drying tower circulating cooler 2, a second drying tower 3 and a second drying tower circulating cooler 4,
the first drying tower 1, the brine concentration tank 9, the brine recovery tank 7 and the brine tank 8 are sequentially communicated to form a liquid circulation loop, the first drying tower 1 is communicated with the first drying tower circulating cooler 2 to form a calcium chloride solution cooling circulation loop, and a gas outlet of the first drying tower 1 is communicated with a gas inlet of the second drying tower 3;
the second drying tower 3, the brine concentration tank 9, the brine recovery tank 7 and the brine tank 8 are sequentially communicated to form a liquid circulation loop, the second drying tower 3 is communicated with a second drying tower circulating cooler 4 to form a calcium chloride solution cooling circulation loop, and a gas outlet of the second drying tower 3 is communicated with a gas-liquid separator 5;
the first drying tower circulating cooler 2 and the second drying tower circulating cooler 4 are used for cooling calcium chloride solutions in the first drying tower 1 and the second drying tower 3 to avoid input gas condensation to influence the dewatering effect; the brine concentration tank 9 is used for concentrating the circulating calcium chloride solution so that the calcium chloride solution in the first drying tower 1 and the second drying tower 3 is at the optimal water removal concentration.
The brine concentrating tank 9 is communicated with an evaporative cooler 10 for cooling the calcium chloride solution in the brine concentrating tank 9, and the evaporative cooler 10 is communicated with a condensed water collecting tank 11.
The gas input end of the first drying tower 1 is communicated with a compressor, and the compressor is used for performing primary compression on input hexafluoroethane crude gas to facilitate drying and dewatering by a drying mechanism.
The first drying tower 1 and the second drying tower 3 are respectively provided with a plurality of thermometers, and the thermometers are used for detecting the temperatures in the first drying tower 1 and the second drying tower 3 in real time to ensure that the calcium chloride solutions in the first drying tower 1 and the second drying tower 3 are at the optimal water absorption temperature.
The first drying tower 1 and the second drying tower 3 are respectively provided with a plurality of solubility meters, and the solubility meters are used for detecting the concentration of the calcium chloride solution in the first drying tower 1 and the second drying tower 3 in real time to ensure that the calcium chloride solution in the first drying tower 1 and the second drying tower 3 is at the optimal water absorption concentration.
The first drying tower 1 and the second drying tower 3 are respectively provided with a plurality of pressure gauges, and the pressure gauges are used for detecting the pressure of gas in the first drying tower 1 and the second drying tower 3 in real time, so that the optimal dewatering temperature of the calcium chloride solution can be conveniently determined according to the pressure.
Wherein the concentration (mass concentration) of the calcium chloride solution is controlled to be 23-32%.
Wherein the temperature of the calcium chloride solution is controlled to be more than or equal to-12 ℃.
The temperature of the calcium chloride solution is controlled mainly according to the content of the hexafluoroethane crude gas, and the control requirement is that the partial pressure of the hexafluoroethane crude gas is smaller than the saturated vapor pressure at the temperature, so that the hexafluoroethane crude gas cannot be condensed.
Wherein, the comparison table of the concentration of the calcium chloride solution and the freezing point/crystallization point is as follows:
| concentration (%) | 0 | 5 | 10 | 15 | 20 | 21 |
| Freezing point (. degree. C.) | 0 | -2.4 | -5.4 | -10.3 | -18 | -19.9 |
| Concentration (%) | 22 | 23 | 24 | 25 | 26 | 27 |
| Freezing point (. degree. C.) | -22.1 | -24.4 | -26.8 | -29.4 | -32.1 | -35.1 |
| Concentration (%) | 28 | 29 | 29.87 | 30 | 31 | 32 |
| Freezing point (. degree. C.) | -38.8 | -45.2 | -55 | -46 | -36.2 | -28.6 |
| Concentration (%) | 33 | 34 | 35 | 36 | 37 | 38 |
| Freezing point (. degree. C.) | -21.6 | -15.4 | -9.8 | -4.4 | 0.78 | 5.56 |
The utility model discloses a theory of operation: when the mass concentration of the calcium chloride solution is more than 23%, a better water removal effect can be achieved, and meanwhile, the calcium chloride solution cannot be crystallized at the operation temperature of-12 ℃. The quality concentration of calcium chloride is controlled to be 23-32%, so that a good water absorption effect is achieved; after the hexafluoroethane crude gas is subjected to primary compression (0.3Mpa) by a compressor, the moisture in the cracked gas is absorbed step by step through a first drying tower and a second drying tower, and the water content of the gas at the outlet of the calcium chloride drying tower is less than or equal to 0.02 percent; the hexafluoroethane crude gas is returned to the middle compressed gas reservoir after passing through the gas-liquid separator, the hexafluoroethane crude gas is compressed to high pressure (1.6Mpa) in a second stage by a compressor in the compressed gas reservoir, the high-pressure hexafluoroethane crude gas enters a compressed gas dryer for drying, and the water content of the gas at the outlet of the compressed gas dryer is less than or equal to 0.01 percent.
The refrigerant of the calcium chloride drying tower circulating cooler uses saline water with the temperature of-35 ℃, and the temperature of the calcium chloride solution passing through the circulating cooler is controlled to be more than or equal to-12 ℃. The temperature of the calcium chloride solution is controlled mainly according to the content of the hexafluoroethane crude gas, and the control requirement is that the partial pressure of the hexafluoroethane crude gas is less than the saturated vapor pressure at the temperature, so that the hexafluoroethane crude gas can not be condensed. After a period of operation, when the mass concentration of the calcium chloride solution is reduced to 23%, the calcium chloride solution is pumped into a brine concentration tank for concentration treatment, and the concentrated calcium chloride solution can be recycled.
Having shown and described the basic principles and essential features of the invention and its advantages, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but is susceptible to various changes and modifications without departing from the spirit and scope of the invention, all of which are intended to be covered by the appended claims and their equivalents. The details of the present invention are well known to those skilled in the art.
Claims (7)
1. The utility model provides a hexafluoroethane crude gas water trap which characterized in that: the device comprises a drying mechanism for dehydrating and drying crude hexafluoroethane gas by using a calcium chloride solution, wherein a gas outlet end of the drying mechanism is communicated with a gas-liquid separator for performing gas-liquid separation on the dried gas, a liquid outlet of the gas-liquid separator is communicated with a reflux port of the drying mechanism to form a circulation loop, a gas outlet of the gas-liquid separator is communicated with a compressed gas reservoir, and the compressed gas reservoir is communicated with a compressed gas dryer; the drying mechanism is sequentially communicated with a brine concentration tank, a brine recovery tank and a brine tank to form a calcium chloride solution water circulation loop.
2. The hexafluoroethane crude gas water removal device as claimed in claim 1, wherein: the drying mechanism comprises a first drying tower, a first drying tower circulating cooler, a second drying tower and a second drying tower circulating cooler,
the first drying tower, the brine concentration tank, the brine recovery tank and the brine tank are sequentially communicated to form a liquid circulation loop, the first drying tower is communicated with a first drying tower circulating cooler to form a calcium chloride solution cooling circulation loop, and a gas outlet of the first drying tower is communicated with a gas inlet of a second drying tower;
the second drying tower, the brine concentration tank, the brine recovery tank and the brine tank are sequentially communicated to form a liquid circulation loop, the second drying tower is communicated with a second drying tower circulating cooler to form a calcium chloride solution cooling circulation loop, and a gas outlet of the second drying tower is communicated with a gas-liquid separator;
the first drying tower circulating cooler and the second drying tower circulating cooler are used for cooling calcium chloride solutions in the first drying tower and the second drying tower to avoid input gas condensation to influence the dewatering effect; the brine concentration tank is used for concentrating the circulating calcium chloride solution to enable the calcium chloride solution in the first drying tower and the calcium chloride solution in the second drying tower to be at the optimal water removal concentration.
3. The hexafluoroethane crude gas water removal device as claimed in claim 2, wherein: the brine concentration tank is communicated with an evaporation liquid cooler for cooling the calcium chloride solution in the brine concentration tank, and the evaporation liquid cooler is communicated with a condensed water collecting tank.
4. The hexafluoroethane crude gas water removal device as claimed in claim 2, wherein: the gas input end of the first drying tower is communicated with a compressor, and the compressor is used for performing primary compression on input hexafluoroethane crude gas to facilitate drying and dewatering by a drying mechanism.
5. The hexafluoroethane crude gas water removal device as claimed in claim 2, wherein: the first drying tower and the second drying tower are respectively provided with a plurality of thermometers, and the thermometers are used for detecting the temperatures in the first drying tower and the second drying tower in real time to ensure that the calcium chloride solution in the first drying tower and the second drying tower is at the optimal water absorption temperature.
6. The hexafluoroethane crude gas water removal device as claimed in claim 2, wherein: the first drying tower and the second drying tower are respectively provided with a plurality of solubility meters, and the solubility meters are used for detecting the concentration of the calcium chloride solution in the first drying tower and the concentration of the calcium chloride solution in the second drying tower in real time to ensure that the calcium chloride solution in the first drying tower and the calcium chloride solution in the second drying tower are in the best water absorption concentration.
7. The hexafluoroethane crude gas water removal device as claimed in claim 2, wherein: the first drying tower and the second drying tower are respectively provided with a plurality of pressure gauges, and the pressure gauges are used for detecting the pressure of gas in the first drying tower and the second drying tower in real time, so that the optimal dewatering temperature of the calcium chloride solution can be conveniently determined according to the pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121523664.8U CN215250508U (en) | 2021-07-06 | 2021-07-06 | Hexafluoroethane crude gas dewatering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121523664.8U CN215250508U (en) | 2021-07-06 | 2021-07-06 | Hexafluoroethane crude gas dewatering device |
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| CN215250508U true CN215250508U (en) | 2021-12-21 |
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| CN202121523664.8U Active CN215250508U (en) | 2021-07-06 | 2021-07-06 | Hexafluoroethane crude gas dewatering device |
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- 2021-07-06 CN CN202121523664.8U patent/CN215250508U/en active Active
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