Gas drying device

Abstract

The utility model discloses and provides a gas drying device. The gas drying device comprises a shell, an outer pipe and an inner pipe, the shell is provided with a first air inlet and a first air outlet which are close to the first end, and a water outlet which is close to the second end; the outer pipe is arranged in the shell, a first air duct is formed between the outer pipe and the shell, a second air inlet of the outer pipe is arranged close to the second end of the shell, and a first flow limiting piece with a first vent hole is arranged at the second air inlet; the inner pipe is arranged in the outer pipe, a second air channel is formed between the inner pipe and the outer pipe, a second vent hole is formed in the side face of the inner pipe and communicated with the second air channel, and a third air outlet of the inner pipe is communicated with the first air outlet. The air source dryer has the advantages that the air source dryer used at the tail end (air using end) of equipment is designed, and the problem that compressed air generates a large amount of condensate water at the tail end of a pipeline is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas source drying equipment, in particular to a gas drying device. Background Art

[0002] A gas dryer is a device used to remove moisture or other humidity components from gas. In many industrial and laboratory applications, it is necessary to handle dry gas because moisture may have a negative impact on equipment and processes. A gas dryer removes moisture or humidity components from gas through adsorption, condensation, membrane separation, chemical reaction, etc. to obtain dry gas.

[0003] The temperature of compressed air just coming out of the air compressor can reach between 140 and 170 degrees. At this time, the water in the air is in a gaseous state. It is impossible to fully and quickly separate the water and gas. Only when the temperature drops to a certain temperature can the water in the air completely turn into a liquid state. Even the cold dryer cannot maintain this temperature for a long time. There will also be a large amount of water transported to the gas application end in the form of gas. As the transportation distance increases, the temperature of the air gradually decreases. During the pipeline transportation process, the alternation of hot and cold will produce a large amount of cold water. This is why there is still a large amount of cold water even after the cold dryer is installed.

[0004] There is an urgent need for a device that dries the gas source at the end (gas-using end) to solve this problem. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a gas drying device in view of the above-mentioned defects of the prior art, so as to solve the problem that the existing gas drying device has a complex structure and needs to replace the core.

[0006] The utility model solves the technical problem by adopting a technical solution: providing a gas drying device, comprising: a shell, an outer tube and an inner tube;

[0007] The housing is provided with a first air inlet and a first air outlet arranged near the first end, and a water discharge outlet arranged near the second end;

[0008] The outer tube is arranged in the shell and a first air duct is formed therebetween; a second air inlet of the outer tube is arranged close to a second end of the shell; a first flow limiting plate having a first air vent is arranged at the second air inlet;

[0009] The inner tube is arranged inside the outer tube to form a second air duct therebetween, a second vent hole is arranged on the side of the inner tube and is connected to the second air duct, and a third air outlet of the inner tube is connected to the first air outlet.

[0010] Among them, the preferred solution is: the shell includes an end cover, a bottom cover and a tube body, the end cover and the bottom cover are respectively arranged at both ends of the tube body, a first air duct is formed between the tube body and the outer tube, the first air inlet and the first air outlet are arranged on the end cover, and the drain outlet is arranged on the tube body.

[0011] Among them, a preferred solution is that the end cover and the bottom cover are detachably connected to the two ends of the tube body respectively.

[0012] Among them, the preferred solution is: the end cover includes an inner cavity, the first air inlet and the first air outlet are respectively arranged on the sides of the end cover and connected to the inner cavity, the end cover also includes an air outlet channel, one end of the air outlet channel includes a fourth air outlet arranged in the center of the end cover, the other end of the air outlet channel is connected to the first air outlet, the inner cavity is connected to the first air duct, and the fourth air outlet is connected to the third air outlet.

[0013] Among them, a preferred solution is: at least one first current limiting plate is provided, and a plurality of first vents are arranged on the first current limiting plate, and the plurality of first vents are arranged around the central area of ​​the first current limiting plate and close to the edge.

[0014] Among them, the preferred solution is: a second flow limiting plate is also arranged in the outer tube, the second flow limiting plate includes a first through-hole and a third vent, the first through-hole is arranged in the central area of ​​the second flow limiting plate, the inner tube is arranged through the first through-hole, and the second flow limiting plate is convenient to abut against the inner side of the outer tube.

[0015] Among them, a preferred solution is: at least one second flow limiting plate is provided, and a plurality of third vents are arranged on the second flow limiting plate, and the plurality of third vents are arranged around the first through opening of the second flow limiting plate close to the edge.

[0016] Among them, a preferred solution is: the third air outlet is arranged at one end of the inner tube, the other end of the inner tube is sealed, and a plurality of the second air vents are arranged on the side of the inner tube.

[0017] Among them, a preferred solution is: the inner tube is provided with a joint at the third air outlet, and the other end of the joint passes through the outer tube and is connected to the fourth air outlet.

[0018] Among them, a preferred solution is that one end of the outer tube close to the end cover is fixedly connected to a cover plate, the cover plate is provided with a second through hole, and one end of the joint passes through the through hole of the cover plate and is inserted into the fourth air outlet.

[0019] The beneficial effect of the utility model is that, compared with the prior art, the utility model solves the problem of a large amount of condensed water generated by compressed gas at the end of the pipeline through an air source dryer used at the end of the equipment (gas-using end), and the air source dryer of the present application does not require a filter element, does not require additional energy drive, has low production cost, and does not require maintenance in the later stage; the utility model can be used to replace the function of a cold dryer, does not require energy drive, and has huge economic benefits; it utilizes centrifugal force and multiple compression processes to effectively remove moisture from the gas, improve the drying effect, and ultimately allow the dry gas to flow out of the device smoothly BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 It is a cross-sectional view of the structure of the air source dryer according to an embodiment of the present disclosure;

[0022] Figure 2 This is a schematic diagram of the end cover structure of an embodiment of the present disclosure;

[0023] Figure 3 This is a schematic diagram of the inner tube structure of an embodiment of the present disclosure;

[0024] Figure 4 This is a schematic diagram of the structure of a first current limiting sheet according to an embodiment of the present disclosure;

[0025] Figure 5 is a schematic diagram of the structure of a second current limiting sheet according to an embodiment of the present disclosure;

[0026] Figure 6 A schematic diagram of a compressed gas flow path according to an embodiment of the present disclosure;

[0027] Figure 7 This is a schematic diagram of the end cover structure of an embodiment of the present disclosure;

[0028] Figure 8 A cross-sectional view of the structure of the air source dryer close to the end cover of an embodiment of the present disclosure;

[0029] Fig. 9 This is a cross-sectional view of the structure of the air source dryer close to the end cover and omitting the inner tube of the embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0031] like Figures 1 to 9 As shown, the utility model provides a preferred embodiment of a gas drying device.

[0032] A gas drying device comprises: a shell 100, an outer tube 200 and an inner tube 300; the shell 100 is provided with a first air inlet 111 and a first air outlet 112 arranged near the first end, and a drain outlet 131 arranged near the second end; the outer tube 200 is arranged in the shell 100 and a first air duct 101 is formed therebetween, the second air inlet 210 of the outer tube 200 is arranged near the second end of the shell 100, and a first flow limiting plate 400 having a first air vent 410 is arranged at the second air inlet 210; the inner tube 300 is arranged in the outer tube 200 and a second air duct 102 is formed therebetween, the side of the inner tube 300 is provided with a second air vent 310 and is connected to the second air duct 102, and the third air outlet 320 of the inner tube 300 is connected to the first air outlet 112.

[0033] The airflow flows as follows: the external air enters the first air duct 101 through the first air inlet 111, flows along the first air duct 101 and enters the second air duct 102 from the second air inlet 210, then flows along the second air duct 102 and enters the inner tube 300 from the second vent hole 310, and finally flows into the first air outlet 112 through the third air outlet 320 and is discharged to the outside. In the normal use state, the housing 100 is placed vertically, that is, the first end of the housing 100 is placed upward, and the second end of the housing 100 is placed downward.

[0034] In the first air duct 101, the gas entering the first air duct 101 from the first air inlet 111, under the action of centrifugal force, spirals downward in the first air duct 101 and discharges moisture in the gas, and the discharged moisture is discharged through the drain port 131, thereby achieving the first drying of the gas; at the second air inlet 210, the gas is compressed due to the action of the first flow limiting plate 400, and the gas entering the second air duct 102 from the first air duct 101 through the first flow limiting plate 400 is compressed, which on the one hand increases the gas flow rate, and on the other hand performs secondary compression on the gas to discharge moisture in the gas; thereafter, the airflow continues to flow along the second air duct 102, and enters the inner tube 300 through the second air vent 310, and through the action of the second air vent 310, the gas is compressed again to discharge moisture in the gas and increase the gas flow rate, and finally flows out from the first air outlet 112 through the third air outlet 320 in the inner tube 300. Centrifugal force and multiple compression processes are used to effectively remove moisture from the gas, improve the drying effect, and ultimately allow the dry gas to flow out of the device smoothly.

[0035] In the process from the first air duct 101 to the second air duct 102, the gas is bent by 180 degrees, and in the process from the second air duct 102 to the inner tube 300, the gas is bent by 90 degrees, which avoids the generation of the siphon effect, further removes moisture in the air, and flows into the drain port 131 at the bottom of the housing 100 along the second air duct 102. In the actual process, not only the moisture in the gas is discharged, but also the oil and impurities in the gas can be discharged, so that the gas containing moisture, oil and impurities enters from the first air inlet 111, passes through the gas drying device, and discharges dry and clean gas from the first air outlet 112, and the compression process separates and removes substances of different components.

[0036] The essence of compression is to cool the gas. The cooling principle is Bernoulli's principle. When the gas passes through a small hole from a large volume area, the flow rate will increase, causing pressure changes and low temperature. After passing a certain distance in the closed space, the gas pressure will become almost constant, achieving multiple cooling effects (through the first air vent 410 of the first current limiting plate 400 and the second air vent 310 of the inner tube 300).

[0037] In this embodiment, the shell 100 includes an end cover 110, a bottom cover 130 and a tube body 120, the end cover 110 and the bottom cover 130 are respectively arranged at both ends of the tube body 120, a first air duct 101 is formed between the tube body 120 and the outer tube 200, the first air inlet 111 and the first air outlet 112 are arranged on the end cover 110, and the drain port 131 is arranged on the tube body 120.

[0038] Specifically, the tube body 120 is a hollow tube body, and the end covers 110 and the bottom cover 130 are respectively arranged at the two ends of the hollow tube body. The outer tube 200 is arranged in the hollow interior of the tube body 120. The outer tube 200 is also a hollow tube body, and the outer tube 200 is open at one end and sealed at the other end. The sealed end of the outer tube 200 is arranged close to the end cover 110, and the open end is arranged close to the bottom cover 130. Therefore, the airflow in the first air duct 101 can only enter the second air duct 102 from the area close to the bottom cover 130; and the inner tube 300 is also preferably arranged close to the end cover 110, so that the third air outlet of the inner tube 300 is connected to the first air outlet of the end cover 110.

[0039] Furthermore, the second vent holes 310 of the inner tube 300 are preferably arranged near the end cover 110 to provide a sufficient gas flow distance so that the gas pressure is gradually constant. The third gas outlet 320 is arranged at one end of the inner tube 300, and the other end of the inner tube 300 is sealed. A plurality of the second vent holes 310 are arranged on the side of the inner tube 300. The plurality of second vent holes 310 are arranged along the length direction of the inner tube 300 and form a vertical group. A plurality of vertical groups are formed on the side of the inner tube 300, so that the gas can enter the inner tube 300 from all directions in the second air duct 102.

[0040] In this embodiment, the end cover 110 and the bottom cover 130 are respectively detachably connected to the two ends of the tube body 120. The tube body 120 is a circular tubular structure with openings at both ends and a hollow interior. The tube body 120 is made of metal material. The end cover 110 and the bottom cover 130 are respectively detachably connected to the two ends of the tube body 120 and can be fixed by interference fit or threaded connection.

[0041] The end cover 110 includes an inner cavity 113, the first air inlet 111 and the first air outlet 112 are respectively arranged on the side of the end cover 110 and communicated with the inner cavity 113, the end cover 110 also includes an air outlet channel 114, one end of the air outlet channel 114 includes a fourth air outlet 115 arranged at the center of the end cover 110, the other end of the air outlet channel 114 is communicated with the first air outlet 112, the inner cavity 113 is communicated with the first air duct 101, and the fourth air outlet 115 is communicated with the third air outlet 320. Furthermore, the high-temperature compressed air enters the tube body 120 through the first air inlet 111 and spirally falls along the first air duct 101 to generate centrifugal force. Under the action of the centrifugal force, the water in the air enters the drain port 131 and is discharged. After the air is dried by the drying mechanism, it is discharged from the first air outlet 112 to supply the gas-using equipment for use.

[0042] Furthermore, since the first air outlet 112 is arranged on the side of the end cover 110, the gas enters the inner cavity 113 horizontally from the first air outlet 112. Since the cavity formed by the inner cavity 113 and the first air duct 101 is a hollow annular cavity, the gas rotates and flows in the hollow annular cavity. Since the gas continuously enters and is squeezed downward, and under the influence of gravity, the gas spirally flows downward in the hollow annular cavity.

[0043] In this embodiment, the inner tube 300 is provided with a joint 600 at the third air outlet 320, and the other end of the joint 600 passes through the outer tube 200 and communicates with the fourth air outlet 115. The end of the outer tube 200 close to the end cover 110 is fixedly connected with a cover plate 220, and the cover plate 220 is provided with a second through hole 221, and one end of the joint 600 passes through the through hole of the cover plate 220 and is inserted into the fourth air outlet 115. A cover plate 220 is welded and fixed to one end of the outer tube 200 close to the end cover 110, and a joint 600 is detachably connected to one end of the inner tube 300. The joint 600 and the inner tube 300 are fixed by threaded connection or interference fit. The joint 600 passes through the second through hole 221 of the cover plate 220 and is inserted into the fourth air outlet 115, so that the joint 600 is connected with the air outlet channel 114; further, the inner side of the end cover 110 is provided with an internal thread, and the outer side of the joint 600 is provided with an external thread. The end cover 110 and the joint 600 are fixed by threaded connection, and the inner tube 300 is connected with the first air outlet 112. The outer tube 200 is a circular tubular structure with openings at both ends and a hollow interior. The bottom end of the inner tube 300 is sealed to prevent compressed air from entering from the bottom end of the inner tube 300. After the compressed air enters the inner tube 300 through the first air inlet 111, it moves downward in a spiral along the inner wall of the inner tube 300, enters from the bottom of the outer tube 200 after moving to the bottom, enters from the second air vent 310 after a 90-degree bend, and finally is discharged from the first air outlet 112. When the compressed air passes through the second air vent 310 at high speed, according to the Bernoulli principle, its flow rate will increase significantly, and the increase in flow rate will lead to a decrease in pressure. This process is accompanied by the conversion of the internal energy of the air into kinetic energy, and the internal energy is reduced, which will cause the temperature to drop. In addition, when the air passes through the small hole quickly, it may rub against the hole wall, etc., and the friction will also produce a certain amount of heat loss, which will lead to a decrease in temperature. In addition, if the air itself is in a high-pressure state, the pressure drops sharply after passing through the small hole. This adiabatic expansion process will also cause the temperature to drop. After the temperature drops, the water vapor in the compressed air becomes condensed water and is discharged from the drain port 131, while the dried compressed air is discharged from the exhaust port. When the compressed air enters the inner tube 300 from the second air hole 310 of the inner tube 300, the compressed air is bent and discharged. The purpose is to utilize the turbulence principle to avoid the siphon effect and bring the water that is not discharged in time by the drainer into the first air outlet 112.

[0044] In this embodiment, a second flow-limiting piece 500 is further disposed in the outer tube 200. The second flow-limiting piece 500 includes a first through-hole 520 and a third vent hole 510. The first through-hole 520 is disposed in the central region of the second flow-limiting piece 500. The inner tube 300 is disposed through the first through-hole 520, and the second flow-limiting piece 500 is conveniently abutted against the inner side of the outer tube 200. The function of the second flow-limiting piece 500 is consistent with that of the first flow-limiting piece 400, and the gas is compressed through the third vent hole 510. On the other hand, the second flow-limiting piece 500 can also realize the positioning and fixing of the inner tube 300, ensure the stability of the inner tube 300 in the outer tube 200, and also serve as a fixed support structure.

[0045] The edges of the first limiting plate 400 and the second limiting plate 500 are matched with the inner wall gap of the outer tube 200 to prevent air from passing through the gap between the partition and the outer tube 200. After the compressed air enters from the first air inlet 111, it passes through the first air vent 410 of the first limiting plate 400 and the third air vent 510 of the second limiting plate 500. At this time, the temperature of the compressed air is reduced (the principle has been explained in detail above and will not be repeated here). After multi-stage cooling, it enters the inner tube 300 from the second air vent 310 of the inner tube 300 and is discharged from the first air outlet 112. After multiple cooling, the water vapor in the compressed air is condensed and discharged, thereby improving the drying effect.

[0046] There is at least one first current limiting piece 400, and a plurality of first vents 410 are arranged on the first current limiting piece 400, and the plurality of first vents 410 are arranged around the central area of ​​the first current limiting piece 400 and close to the edge. There is at least one second current limiting piece 500, and a plurality of third vents 510 are arranged on the second current limiting piece 500, and the plurality of third vents 510 are arranged around the first through opening 520 of the second current limiting piece 500 and close to the edge.

[0047] Regarding the first flow limiting plate 400, a plurality of first vent holes 410 are arranged and evenly distributed around the central area of ​​the first flow limiting plate 400, and other first vent holes 410 are also arranged between the edge and a circle of multiple first vent holes 410. By evenly distributing the first vent holes 410 on the first flow limiting plate 400, the gas is more evenly distributed when passing through the flow limiting plate, ensuring the uniformity of contact of the gas on the entire surface of the flow limiting plate, and increasing the surface area of ​​contact between the gas and the flow limiting plate, thereby enhancing the drying effect and the condensation and discharge efficiency of water vapor. By arranging other first vent holes 410 between the edge and a circle of multiple first vent holes 410, the surface area of ​​contact between the gas and the flow limiting plate can be further increased, effectively improving the heat transfer and mass transfer efficiency in the gas treatment process, which is beneficial to the condensation and discharge of water vapor, thereby improving the drying effect of the gas.

[0048] Similarly, regarding the second current limiting plate 500 , a plurality of third vent holes 510 are arranged and evenly distributed around the first through hole 520 of the second current limiting plate 500 , and other third vent holes 510 are further arranged between the edge and a circle of the plurality of third vent holes 510 .

[0049] In addition, the aperture sizes of the first vent hole 410, the second vent hole 310 and the third vent hole 510 are set to be between 0.8-2.2 mm, preferably 1 mm or 2 mm, mainly based on the difficulty of processing the first vent hole 410, the second vent hole 310 and the third vent hole 510. At the same time, if the aperture size is too small, it will affect the air flow and easily cause blockage, and if the aperture size is too large, it cannot block large water droplets and impurities. The number of holes will be set according to the exhaust volume.

[0050] The working principle of the utility model is as follows: compressed air enters from the first air inlet 111, moves downward at high speed along the inner spiral of the tube body 120, and uses the principle of centrifugal force to throw water in the air to the inner wall of the outer tube 200. Under the action of gravity, the compressed air is discharged downward through the drain port 131. When the compressed gas with most of the water vapor removed reaches the bottom, the air enters from the bottom end of the outer tube 200, is cooled by the first flow limiting plate 400, and continues to be cooled by the second flow limiting plate 500. After a 90-degree bend, it passes through the second vent 310 to enter the inner tube 300, and is finally discharged from the first air outlet 112. The compressed air passes through the microporous cooling structure three times, and the temperature is reduced to the corresponding pressure dew point. The water vapor in the compressed air is converted into condensed water, which is gathered at the drain port 131 and discharged through the automatic drain connected to the drain port 131 pipeline.

[0051] The above is only the best embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made within the scope of the patent application of the present invention are covered by the present invention.

Claims

1. A gas drying device, characterized in that: include: Shell, outer tube and inner tube; The housing is provided with a first air inlet and a first air outlet arranged near the first end, and a water discharge outlet arranged near the second end; The outer tube is arranged in the shell and a first air duct is formed therebetween; a second air inlet of the outer tube is arranged close to a second end of the shell; a first flow limiting plate having a first air vent is arranged at the second air inlet; The inner tube is arranged inside the outer tube to form a second air duct therebetween, a second vent hole is arranged on the side of the inner tube and is connected to the second air duct, and a third air outlet of the inner tube is connected to the first air outlet.

2. The gas drying device according to claim 1, characterized in that: The shell includes an end cover, a bottom cover and a tube body, wherein the end cover and the bottom cover are respectively arranged at both ends of the tube body, a first air duct is formed between the tube body and the outer tube, the first air inlet and the first air outlet are arranged on the end cover, and the drain outlet is arranged on the tube body.

3. The gas drying device according to claim 2, characterized in that: The end cover and the bottom cover are detachably connected to the two ends of the tube body.

4. The gas drying device according to claim 2 or 3, characterized in that: The end cover includes an inner cavity, the first air inlet and the first air outlet are respectively arranged on the sides of the end cover and connected to the inner cavity, the end cover also includes an air outlet channel, one end of the air outlet channel includes a fourth air outlet arranged in the center of the end cover, the other end of the air outlet channel is connected to the first air outlet, the inner cavity is connected to the first air duct, and the fourth air outlet is connected to the third air outlet.

5. The gas drying device according to claim 4, characterized in that: At least one first current limiting plate is provided, and a plurality of first vent holes are arranged on the first current limiting plate. The plurality of first vent holes are arranged around the central area of ​​the first current limiting plate and close to the edge.

6. The gas drying device according to claim 1, characterized in that: A second flow limiting plate is also arranged in the outer tube, and the second flow limiting plate includes a first through-hole and a third vent hole, the first through-hole is arranged in the central area of ​​the second flow limiting plate, the inner tube is arranged through the first through-hole, and the second flow limiting plate is convenient to abut against the inner side of the outer tube.

7. The gas drying device according to claim 6, characterized in that: At least one second flow limiting plate is provided, and a plurality of third vent holes are arranged on the second flow limiting plate. The plurality of third vent holes are arranged around the first through opening of the second flow limiting plate and close to the edge.

8. The gas drying device according to claim 1 or 2, characterized in that: The third air outlet is arranged at one end of the inner tube, the other end of the inner tube is sealed, and a plurality of the second air vents are arranged on the side of the inner tube.

9. The gas drying device according to claim 4, characterized in that: The inner tube is provided with a joint at the third air outlet, and the other end of the joint passes through the outer tube and is communicated with the fourth air outlet.

10. A gas drying device according to claim 9, characterized in that: One end of the outer tube close to the end cover is fixedly connected with a cover plate, the cover plate is provided with a second through hole, and one end of the joint passes through the through hole of the cover plate and is inserted into the fourth air outlet.

Images