SU1720690A1 - Device for drying compressed gas - Google Patents

Abstract

The invention relates to a technique for the drying of gases by cooling and adsorption, and can be used in chemical and adjacent parts of a national household. The purpose of the invention is to reduce operating costs by increasing the compactness of the device. The device contains a cylindrical body 4, heat exchanger located in it, adsorbers and a vortex tube. The compactness of the device is achieved by the fact that adsorbers and a heat exchanger are located on both sides of the vortex tube, while the upper cavities of the adsorbers are connected to the cold end through a heat exchanger, and the lower cavities with the hot end of the vortex tube. 2 Il.

Description

The invention relates to a technique for drying gases by cooling and adsorption, and can be used in the chemical industry, in particular, ozonation facilities for processing natural gas before its transportation and other areas of national economy.

The purpose of the invention is to reduce operating costs due to the compactness of the device.

Figure 1 shows the scheme of the proposed device for gas drying; figure 2 is a section in figure 1,

The device contains a heat exchanger 1, located inside the cylindrical body 2, coaxially with which is placed the inner cylinder 3 with the bottom 4, the cover 5 and the upper and lower horizontal partitions 6 made of porous filter material and playing the role of dust filters, a vortex tube 7 with nozzle input 8 and the throttle valve 9. The inner cylinder 3 is provided with a vertical radial partition 10, which together with the bottom 4, the cover 5 and the instrumental dividers 6, form a pair of independent chambers: the upper 11 and 12 are preliminary tionary dry gas, and average 13 14 - filled with an adsorbent, a bottom 15 and 16 - completely dry gas. Chambers 11, 13, and 15 constitute the left adsorber, and cameras 12, 14, and 16, the right adsorber. In the annular space between the housing 2 and the cylinder 3 there is a high-pressure inter-pipe cavity 17 and a low-pressure pipe cavity 18 of the heat exchanger 1. The low pressure pipe cavity 18 is connected to the bottom by a pipe 19 with the cold end 20 of the vortex pipe 7, and from above with the upper chambers 11 and 12 by pipes 21 , 22 and 23. Nozzles 24, 25 and 26 connect the upper chambers 11 and 12 to the atmosphere. The hot end 27 of the vortex tube 7 is connected by nozzles 28 and 29 to the lower chamber.

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15 and 16, of which dried gas flows to consumer pipes 30 and 31. The lower part of housing 2 forms a conical bottom 32 with a drain device 33. Moist gas is supplied to the device through pipeline 34 of the original moist gas.

The device works as follows.

The dried compressed gas with a pressure of 8 bar and a temperature of 25-30 ° C through conduit 34 enters the annular cavity 17 of the high pressure of the heat exchanger 1. Moving in the annular spiral cavity, the gas is cooled to a temperature of 1-3 ° C with a cold gas stream flowing into the pipe the cavity 18 of the heat exchanger 1 from the cold end 20 of the vortex tube 7 through the connecting pipe 19. At the same time, condensate of water is released from the compressed gas, which is collected in the conical bottom 32 of the housing 2 and as it accumulates it is discharged through the drain device 33. The withdrawn gas flows from the high-pressure annular cavity 17 through the nozzle inlet 8 into the vortex tube 7, where, due to expansion to a pressure of 4 bar and intensive swirling, one part of the gas is cooled to a temperature of minus 2Ј-30 ° C and the other part is heated to a temperature of 60 -70 ° C. Next, the cooled gas flow enters from the vortex tube 7 through the connecting pipe 19 into the tubular cavity 18 of low pressure and then enters through one pipe 21 into one of the upper chambers 11 or 12, passes through the upper horizontal partition 6 and enters the corresponding chamber 13 or 14 filled with adsorbent, where the final gas drying occurs. to the dew point minus 52 °. From the adsorbent chamber, the dried gas passage through the lower horizontal wall 6, which prevents the dust generated by the particles of the adsorbent degrading during operation, is carried into the corresponding chamber 15 or 16 - finally dried gas, from where it is supplied to the consumer via pipeline 30 or 31.

Chambers 13 and 1-4, filled with adsorbent, work alternately (one camera in

work, the friend is regenerated) - in the mode

short-cycle regeneration, which is carried out by passing a hot gas upward through the adsorbent. The cycle time of the cameras is 5-15 minutes. The beginning of the regeneration cycle of one of the chambers coincides with the beginning of the working cycle

another camera.

Switching valves in the device is as follows. In the case of switching on the regeneration of chamber 13 and the end of the regeneration cycle of chamber 14

at the same time, the valves on the nozzle 28 and 24 are opened and the valves are closed on. pipe 23 and pipe 30. Hot gas through pipe 28 enters the lower chamber 15, passes through the adsorbent and is removed

through the chamber 11 through the pipe 24 and 26 into the atmosphere. At the same time, the valves on the pipes 25 and 29 are closed and open on the pipe 22 and the pipe 31. The dried gas flows from the pipe 22 into the chambers 12, 14 and

16 and is directed to the consumer through the piping .31.

Claims (1)

Invention Formula A device for drying compressed gas containing adsorbers, a heat exchanger and a vortex tube, characterized in that, in order to reduce operating costs by increasing the compactness of the device, the heat exchanger and adsorbers are located on either side of the vortex tube, while the upper cavities of the adsorbers are connected through a heat exchanger with a cold end, and lower with a hot end vortex tube. W I V 9 26    . I 1 13 J