Drying device for producing pentafluoroethane

Abstract

The utility model discloses a drying device for producing pentafluoroethane, which relates to the field of pentafluoroethane production and comprises a cooling and drying part and a second shell, the cooling and drying part comprises a first shell, an inner shell is arranged in the first shell, the left end of the inner shell communicates with an air inlet pipe, the left end of the air inlet pipe penetrates through the first shell, and a cooling part is arranged in the first shell; the second shell and the first shell are connected through an air guide pipe, and a water absorption drying part is arranged in the middle of the second shell. The pentafluoroethane drying device has the advantages that water vapor in pentafluoroethane can be cooled, condensed and removed, water vapor in pentafluoroethane can be adsorbed, dried and removed, the limitation of a mold on water vapor separation due to mold separation and filtration is effectively avoided, and the drying efficiency of pentafluoroethane can be effectively improved; and the drying layer and the drying cylinder are of an integrated structure, so that the water absorbing and drying part can be disassembled and assembled conveniently, great convenience is brought to replacement of the drying layer, and popularization and use of the product are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pentafluoroethane production, and specifically relates to a drying device for producing pentafluoroethane. Background Art

[0002] Pentafluoroethane is an organic compound, belonging to a colorless non-flammable gas; slightly soluble in water and hydrocarbons; stable under normal conditions, decomposed by high temperature, releasing toxic gases (such as hydrogen fluoride and carbon tetrafluoride); contact with alkali metals and metals such as silver and copper should be avoided during storage; used as an etchant for oxides in the semiconductor production process; used as a fire extinguishing agent; used as a substitute for blowing agents; its boiling point is -48.25°C; therefore, during the production process of pentafluoroethane, it is often necessary to dry pentafluoroethane. For example, the patent with the application number 202320091555.6 discloses a gas drying device, which can first perform membrane separation filtration on the gas, and then use a desiccant to adsorb water vapor, effectively removing moisture in the gas, with good practicability;

[0003] However, during the drying process, the desiccant needs to be replaced regularly, and the desiccant is directly laid in the drying device, which is not conducive to the maintenance and replacement of the device. In addition, the use of membrane separation filtration greatly limits the water vapor separation speed and affects the drying efficiency of pentafluoroethane.

[0004] Therefore, we propose a drying device for producing pentafluoroethane. Content of the Utility Model

[0005] The purpose of the utility model is to solve the above problems and has advantages such as being convenient for maintenance and replacement, as described in detail below.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A drying device for producing pentafluoroethane provided by the utility model includes a cooling and drying part and a second housing;

[0008] The cooling and drying part includes a first housing, an inner housing is arranged inside the first housing, an air inlet pipe is communicated with the left end of the inner housing, the left end of the air inlet pipe penetrates through the first housing, a water outlet pipe is arranged in the middle of the inner housing, and a cooling part is arranged inside the first housing;

[0009] The second housing and the first housing are connected by a gas guide pipe, and a water absorption and drying part is arranged in the middle of the second housing.

[0010] Preferably, the upper end of the water outlet pipe communicates with the inner part of the inner shell near the lower end. The lower end of the water outlet pipe penetrates through the first shell, and a valve is arranged on the lower end of the water outlet pipe outside the first shell to ensure the connection between the water outlet pipe and the inner shell, laying a foundation for the water in the inner shell to flow out and ensuring the condensation, drying, and precipitation of water vapor by the device.

[0011] Preferably, the cooling part includes a spiral pipe sleeved outside the inner shell. Both ends of the spiral pipe are communicated with a connecting pipe, and the upper end of the connecting pipe penetrates through the first shell to realize the connection and installation of the cooling part, laying a foundation for cooling the inside of the first shell and for the condensation and precipitation of water vapor in the inner shell.

[0012] Preferably, one end of the air guide pipe communicates with the right end of the second shell, and the other end of the air guide pipe penetrates through the first shell and communicates with the right end of the inner shell to ensure the normal flow of the pentafluoroethane to be dried in the device.

[0013] Preferably, the water absorption and drying part includes a drying cylinder. The left end of the drying cylinder is threadedly connected to the middle of the left end of the second shell. An air outlet pipe is arranged in the middle of the drying cylinder and communicates with the inside of the drying cylinder. Uniformly distributed air inlet holes are arranged on the right end of the drying cylinder, and the air inlet holes are located inside the second shell. A drying layer is arranged inside the drying cylinder to realize the connection and installation of the water absorption and drying part, ensure the normal operation of the water absorption and drying part, and perform the function of adsorbing and drying water vapor by the device.

[0014] Preferably, a handwheel is arranged at the left side of the drying cylinder, and the handwheels are circularly arrayed at the left side of the drying cylinder. The presence of the handwheels facilitates the rotation of the drying cylinder and the disassembly of the drying cylinder.

[0015] Preferably, the drying layer is laid with a desiccant, and the desiccant is made of activated carbon or calcium oxide to ensure the water absorption and drying function of the water absorption and drying part.

[0016] The beneficial effects of the present utility model are as follows:

[0017] By the combined use of the cooling and drying part, the cooling part, and the water absorption and drying part, it is possible to both cool and condense and remove the water vapor in the pentafluoroethane and adsorb and dry and remove the water vapor in the pentafluoroethane, effectively avoiding the limitation of the mold separation and filtration on the separation of water vapor by the mold, and effectively improving the drying efficiency of the pentafluoroethane.

[0018] The drying layer and the drying cylinder adopt an integrated structure, which facilitates the disassembly and installation of the water absorption and drying part, brings great convenience to the replacement of the drying layer, and is conducive to the popularization and use of the product. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 is the front view structural schematic diagram of the present invention;

[0021] Figure 2 is the present invention Figure 1 's three-dimensional structural schematic diagram;

[0022] Figure 3 is the present invention Figure 1 's three-dimensional front view sectional structural schematic diagram.

[0023] The description of the reference numerals is as follows:

[0024] 1. Cooling and drying part; 101. First housing; 102. Intake pipe; 103. Inner shell; 104. Valve; 105. Outlet pipe; 2. Cooling part; 201. Connecting pipe; 202. Spiral pipe; 3. Air guide pipe; 4. Second housing; 5. Water absorption and drying part; 501. Drying cylinder; 502. Drying layer; 503. Intake hole; 504. Handwheel; 505. Outlet pipe. Detailed implementation manners

[0025] To make the purpose, technical solutions and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present invention.

[0026] See Figures 1 - 3As shown, the utility model provides a drying device for producing pentafluoroethane, comprising a cooling and drying part 1 and a second shell 4; the cooling and drying part 1 comprises a first shell 101, an inner shell 103 is arranged inside the first shell 101, the left end of the inner shell 103 is connected with an air inlet pipe 102, the left end of the air inlet pipe 102 passes through the first shell 101, and a water outlet pipe 105 is arranged in the middle of the inner shell 103, further, the upper end of the water outlet pipe 105 is connected with the lower end of the inner shell 103, the lower end of the water outlet pipe 105 passes through the first shell 101, and the lower end of the water outlet pipe 105 is located on the outer side of the first shell 101 and is provided with a valve 104, By adopting the above design, the connection between the water outlet pipe 105 and the inner shell 103 can be ensured, which lays a foundation for the outflow of water in the inner shell 103 and ensures that the device condenses, dries and precipitates water vapor. The first shell 101 is provided with a cooling unit 2 inside. Specifically, the cooling unit 2 includes a spiral tube 202, which is sleeved on the outer side of the inner shell 103. Both ends of the spiral tube 202 are connected with a connecting tube 201. The upper end of the connecting tube 201 passes through the first shell 101. By adopting the above design, the connection and installation of the cooling unit 2 can be realized, which lays a foundation for cooling the inside of the first shell 101 and condensing and precipitating water vapor in the inner shell 103.

[0027] See also Figure 3 As shown, the second shell 4 and the first shell 101 are connected through the air duct 3. Further, one end of the air duct 3 is connected to the right end of the second shell 4, and the other end of the air duct 3 passes through the first shell 101. The other end of the air duct 3 is connected to the right end of the inner shell 103. The above design can ensure the normal circulation of the pentafluoroethane to be dried in the device. The middle part of the second shell 4 is provided with a water absorption and drying part 5. Specifically, the water absorption and drying part 5 includes a drying cylinder 501. The left end of the drying cylinder 501 is threadedly connected to the middle part of the left end of the second shell 4. The middle part of the drying cylinder 501 is provided with an air outlet pipe 505, and the air outlet pipe 505 is connected to the inside of the drying cylinder 501. Further, the left end of the drying cylinder 501 is provided with a hand steering 504. The hand steering 504 is distributed in a circular array at the left end of the drying cylinder 501. With the above design, the existence of the hand rudder 504 can facilitate the rotation of the drying cylinder 501 and the disassembly of the drying cylinder 501. The right end of the drying cylinder 501 is provided with evenly distributed air inlet holes 503, and the air inlet holes 503 are located inside the second shell 4. The interior of the drying cylinder 501 is provided with a drying layer 502. With the above design, the connection and installation of the water absorption and drying part 5 can be realized to ensure the normal operation of the water absorption and drying part 5, which is the device for the adsorption and drying function of water vapor. Furthermore, the drying layer 502 is paved with a desiccant, and the desiccant is made of activated carbon or calcium oxide. With the above design, the water absorption and drying function of the water absorption and drying part 5 can be guaranteed.

[0028] In an embodiment of the present utility model, for the drying device for producing pentafluoroethane with the above structure, the connection between the cooling part 2 and an external cooling device such as a compressor or a cold water circulation pump is realized through two connecting pipes 201. Thus, the temperature inside the first housing 101 is reduced through the spiral pipe 202, so that the temperature inside the first housing 101 is at a relatively low temperature. At this time, the inner housing 103 will be at a relatively low temperature. When the pentafluoroethane to be dried enters the inner housing 103 through the air inlet pipe 102, the water vapor therein will condense on the inner wall of the inner housing 103 and finally fall below the inner housing 103, realizing the preliminary drying of the pentafluoroethane. After the preliminary drying, the pentafluoroethane finally enters the second housing 4 through the air guide pipe 3. After the pentafluoroethane enters the second housing 4, it enters the drying cylinder 501 through the air inlet hole 503 and finally flows out from the air outlet pipe 505 at the left end of the drying cylinder 501, completing the entire drying process. When the pentafluoroethane flows in the drying cylinder 501 after the preliminary drying, the drying layer 502 in the drying cylinder 501 will further adsorb the water vapor in the pentafluoroethane, thereby realizing the secondary drying of the pentafluoroethane.

[0029] It should be noted that when the cooling part 2 in the present utility model works, it is preferable that the temperature inside the first housing 101 is between 0°C and 10°C, which is beneficial to the condensation and precipitation of the water vapor in the pentafluoroethane and also avoids the water vapor in the pentafluoroethane from condensing into ice.

[0030] The above is only the specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A drying device for producing pentafluoroethane, characterized in that: It includes a cooling and drying part (1) and a second housing (4); The cooling and drying part (1) includes a first housing (101). An inner housing (103) is arranged inside the first housing (101). An air inlet pipe (102) is connected to the left end of the inner housing (103). The left end of the air inlet pipe (102) penetrates through the first housing (101). A water outlet pipe (105) is arranged in the middle of the inner housing (103). A cooling part (2) is arranged inside the first housing (101); The second housing (4) and the first housing (101) are connected by a gas guide pipe (3). A water absorption and drying part (5) is arranged in the middle of the second housing (4).

2. The drying device for producing pentafluoroethane according to claim 1, wherein: The upper end of the water outlet pipe (105) is communicated with the inside of the inner housing (103) at a position slightly lower than the middle. The lower end of the water outlet pipe (105) penetrates through the first housing (101). A valve (104) is arranged at the lower end of the water outlet pipe (105) on the outside of the first housing (101).

3. The drying device for producing pentafluoroethane according to claim 1, characterized in that: The cooling part (2) includes a spiral pipe (202). The spiral pipe (202) is sleeved on the outside of the inner housing (103). Both ends of the spiral pipe (202) are communicated with a connecting pipe (201). The upper end of the connecting pipe (201) penetrates through the first housing (101).

4. The drying device for producing pentafluoroethane according to claim 1, wherein: One end of the gas guide pipe (3) is communicated with the right end of the second housing (4). The other end of the gas guide pipe (3) penetrates through the first housing (101). The other end of the gas guide pipe (3) is communicated with the right end of the inner housing (103).

5. The drying device for producing pentafluoroethane according to claim 1, characterized in that: The water absorption and drying part (5) includes a drying cylinder (501). The left end of the drying cylinder (501) is threadedly connected to the middle of the left end of the second housing (4). An air outlet pipe (505) is arranged in the middle of the drying cylinder (501). The air outlet pipe (505) is communicated with the inside of the drying cylinder (501). Uniformly distributed air inlet holes (503) are arranged on the right end of the drying cylinder (501). The air inlet holes (503) are located inside the second housing (4). A drying layer (502) is arranged inside the drying cylinder (501).

6. The drying device for producing pentafluoroethane according to claim 5, characterized in that: A hand wheel (504) is arranged at the position slightly to the left of the drying cylinder (501). The hand wheels (504) are distributed in a circular array at the position slightly to the left of the drying cylinder (501).

7. The drying device for producing pentafluoroethane according to claim 5, characterized in that: The drying layer (502) is made of a desiccant laid. The desiccant is made of activated carbon or calcium oxide.

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