Helium drying device

Abstract

The utility model provides a helium drying device, which relates to the technical field of drying for helium purification, and comprises a drying tank provided with a gas inlet and a gas outlet, a heating device for heating the drying tank, and a through hole communicated with the inside of the drying tank; the hot air pipe is provided with a closed end and an open end, the closed end extends into the drying tank through the through hole, and the open end is located on the outer side of the drying tank; exhaust holes are formed in the side wall of the hot air pipe, and a plurality of exhaust holes are distributed in the circumferential direction and used for communicating the drying tank with the hot air pipe; the open end of the hot air pipe communicates with an external heat supply pipeline and is used for conveying hot air to the hot air pipe and discharging the hot air into the drying tank through the exhaust hole. And through the arrangement of the hot air pipe and the exhaust hole, the heating and drying efficiency of helium in the drying tank can be improved, repeated drying caused by incomplete drying of moisture in the helium is avoided, and therefore additional procedures are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of drying for helium purification, in particular to a helium drying device. Background Art

[0002] Helium is a rare gas with the chemical formula He. It is colorless and odorless, chemically inactive, and generally difficult to react with other substances.

[0003] In the process of helium purification and production, it is necessary to use drying equipment to reduce the moisture content in helium so as to purify helium later. When helium is dried, helium will pass through the gaps of the adsorbent set in the drying equipment, and most of its moisture will enter the pores of the adsorbent. After being absorbed by the adsorbent, the helium will flow out of the drying equipment to continue the subsequent purification operation. In the above-mentioned helium drying process, there is also a simultaneous drying process: heating. Since the drying of helium is carried out in a closed container, such as a drying tank, the adsorbent is set in the drying tank. There is a heating device on the drying tank, which is used to heat the drying tank and dissipate the heat to the inside of the tank. The helium entering the drying tank will be dried in the heat field formed by the heating device, with the purpose of drying and evaporating the moisture in the helium; in addition, because the helium will absorb moisture through the adsorbent, the drying tank that increases the temperature after being heated can also dry the adsorbent at the same time, which prolongs the use time of the adsorbent and reduces the number of replacements.

[0004] In the process of heating and drying the helium in the above-mentioned drying tank, the tank body is heated from all sides and dissipates heat to the central axis of the tank body. The temperature at the central axis of the tank body is lower than the temperature around the tank body. For the helium entering the tank body, the temperature at the central axis of the tank body is lower, and the drying and evaporation efficiency of the moisture in the helium becomes lower. In addition, the continuous influx of helium into the tank body will cause the temperature at the central axis of the tank body to not rise, which will result in low heating and drying efficiency of the helium in the tank, affecting the subsequent purification of the helium. Utility Model Content

[0005] The utility model proposes a helium drying device to solve the problem that the drying efficiency is low due to insufficient heating temperature of the helium located at the central axis of the tank body in a drying tank for helium, which can improve the heating and drying efficiency of the helium in the drying tank, avoid repeated drying due to incomplete drying of moisture in the helium, and thus reduce the performance of additional processes.

[0006] The technical solution adopted by the utility model is:

[0007] A helium drying device is provided, comprising:

[0008] The drying tank has an air inlet and an air outlet. The drying tank is provided with a heating device for heating the drying tank. The drying tank is provided with a through hole connected to the interior of the drying tank.

[0009] The hot air pipe has a closed end and an open end, the closed end extends to the interior of the drying tank through the through hole, and the open end is located outside the drying tank; a plurality of exhaust holes are provided on the side wall of the hot air pipe, and are distributed circumferentially for connecting the drying tank and the hot air pipe;

[0010] The open end of the hot air pipe is connected to the external heating pipeline, which is used to transport hot air to the hot air pipe and discharge it into the interior of the drying tank through the exhaust hole.

[0011] In some embodiments of the present invention, a plurality of exhaust holes are obliquely opened on the side wall of the hot air pipe, so that the exhaust direction of the hot air pipe is toward the inner bottom of the drying tank.

[0012] In some embodiments of the present invention, it also includes:

[0013] The filter tank has a filter cavity inside, and the filter tank is arranged at the bottom of the drying tank, and the filter cavity is connected with the inside of the drying tank;

[0014] The filter layer is arranged inside the filter cavity, and a cavity is formed between the filter layer and the inner bottom of the filter tank;

[0015] An air pump is located at the connection point between the filter chamber and the drying tank, and is used to pump the helium filtered in the filter chamber into the interior of the drying tank;

[0016] When the filter tank is arranged at the bottom of the drying tank, the air inlet is located on the side wall of the filter tank, so that the air inlet is communicated with the cavity.

[0017] In some embodiments of the utility model, a base located in the cavity is provided on the inner wall of the filter tank, the base is arranged close to the air inlet, a connecting rod is provided on the base, a baffle is rotatably connected to the connecting rod, and a torsion spring is sleeved between the baffle and the connecting rod for resetting the baffle.

[0018] In some embodiments of the present invention, a sealing cushion is provided at one end of the baffle plate that contacts the inner wall of the filter tank.

[0019] In some embodiments of the utility model, an outer cover is provided on the drying tank, and the outer cover is provided with recesses corresponding to the air inlet and the through hole respectively.

[0020] In some embodiments of the utility model, a circular ring is provided on the outer bottom of the drying tank, the bottom of the drying tank is hollowed out and connected to the hollow middle position of the circular ring, a thread is provided on the inner wall of the circular ring, the filter tank and the circular ring are threadedly connected, and a connecting port connected to the air inlet is opened on the side wall of the circular ring.

[0021] In some embodiments of the present invention, the bottom of the outer cover is hollowed out and a cover plate is threadedly connected thereto.

[0022] In some embodiments of the present invention, both the filter tank and the cover plate are provided with handles.

[0023] The beneficial effects of the utility model are:

[0024] 1. The external heating pipeline discharges the heated air into the hot air pipe, so that the hot air can enter the drying tank and then be discharged through the exhaust holes on the hot air pipe. Since the temperature of the drying tank heated by the heating device is higher around, the temperature near the center of the drying tank will be lower. The continuous flow of hot air on the hot air pipe can increase the temperature of the hot air pipe, thus achieving the effect of heating and drying the helium at the center axis of the drying tank, avoiding the situation of incomplete drying of the helium.

[0025] 2. The hot air continuously discharged from the exhaust holes in the hot air pipe can adjust the position of the helium in the drying tank. That is, the density of helium is smaller than that of air, which will cause the helium entering the drying tank to move toward the top of the drying tank. During the movement, the hot air discharged from the exhaust holes on the hot air pipe can blow the rising helium, enhancing the fluidity of the helium, so that the helium can be dried more thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 Schematic diagram of the structure of the helium drying device Figure 1 ;

[0028] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0029] Figure 3 It is a partial enlarged schematic diagram of the inclined setting of the exhaust hole;

[0030] Figure 4 Schematic diagram of the structure of the helium drying device Figure 2 ;

[0031] Figure 5 for Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0032] Figure 6Schematic diagram of the structure of the helium drying device Figure 3 ;

[0033] Figure 7 for Figure 6 A partial enlarged schematic diagram of point C in the middle.

[0034] Reference numerals:

[0035] 1-drying tank, 10-air inlet, 11-air outlet, 12-through hole, 13-A-way valve, 14-B-way valve, 15-ring, 2-hot air pipe, 20-exhaust hole, 3-outer cover, 30-recess, 4-filter tank, 40-filter cavity, 41-filter layer, 42-cavity, 43-base, 44-connecting rod, 45-baffle, 46-sealing cushion, 5-air pump, 6-leg, 7-cover plate. DETAILED DESCRIPTION

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0038] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0039] Example: Figure 1 and Figure 2 As shown, this embodiment provides a helium drying device, comprising:

[0040] The drying tank 1 has an air inlet 10 and an air outlet 11. The drying tank 1 is provided with a heating device for heating the drying tank 1. The drying tank 1 is provided with a through hole 12 connected to the interior thereof.

[0041] The hot air pipe 2 has a closed end and an open end. The closed end extends to the inside of the drying tank 1 through the through hole 12, and the open end is located outside the drying tank 1. The side wall of the hot air pipe 2 is provided with an exhaust hole 20, and a plurality of exhaust holes 20 are distributed in the circumferential direction, for connecting the drying tank 1 and the hot air pipe 2.

[0042] The open end of the hot air pipe 2 is connected to an external heating pipeline, which is used to transport hot air to the hot air pipe 2 and discharge it into the drying tank 1 through the exhaust hole 20.

[0043] In this embodiment, the air inlet 10 is opened near the bottom of the drying tank 1, and the air outlet 11 is located at the top of the drying tank 1. The reason is that the density of helium is less than that of air, so the helium entering the drying tank 1 will rise from the bottom to the top of the drying tank 1. The air inlet 10 of the drying tank 1 is connected to the external helium pipeline through a threaded joint. In addition, two valves are connected to the air outlet 11 of the drying tank 1, namely, the A-way valve 13 and the B-way valve 14. The A-way valve 13 is used to discharge the helium dried by the drying tank 1, and the B-way valve 14 is used to evacuate the remaining gas in the drying tank 1. The A-way valve 13 and the B-way valve 14 are connected through a pipeline. The A-way valve 13 is connected to the collection device for storing the dried helium through a threaded joint, and the B-way valve 14 is connected to the evacuation system through a threaded joint. The opening position of the through hole 12 is located on the side wall of the drying tank 1 and close to the bottom side of the drying tank 1. The two ends of the hot air pipe 2 are a closed end and an open end, respectively. The closed end will extend to the inside of the drying tank 1 through the through hole 12, and the open end is located outside the drying tank 1, or the port of the open end is flush with the outer wall of the drying tank 1, that is, the open end can be connected to the external heating pipeline. In this regard, the heating pipeline used in this embodiment is a hot air supply pipeline, which transmits the heated air to the inside of the drying tank 1 through the hot air pipe 2, and is used to heat and dry the helium in the drying tank 1; in addition, the hot air pipe 2 in this embodiment is L-shaped as a whole, and the distance between the outer wall of the hot air pipe 2 located in the drying tank 1 and the inner wall around the drying tank 1 may not be equal, which will not affect the drying of the helium in the drying tank 1. The heating device in this embodiment is selected as a heating belt, which is wound on the outer wall of the drying tank. The heating belt is mainly composed of electric heating materials and insulating materials. The electric heating material is a nickel-chromium alloy belt, which has the characteristics of fast heating, high thermal efficiency, and long service life. The insulating material is a multi-layer alkali-free glass fiber, which has good temperature resistance and reliable insulation performance.

[0044] When in use, the helium pipeline is opened so that the helium enters the drying tank 1 through the air inlet 10 to be heated and dried. At the same time, the heating pipeline is opened so that the heated hot air enters the drying tank 1 through the hot air pipe 2 and the exhaust hole 20. The helium entering the drying tank 1 will move upward from the bottom of the drying tank 1 because its density is lower than that of air. During the movement of the helium, the hot air entering the hot air pipe 2 will be discharged from the exhaust hole 20. The discharged hot air can dry the helium floating in the drying tank 1. In addition, the discharged hot air can also make the helium in the drying tank 1 move in multiple directions, thereby achieving the effect of improving the fluidity of the helium. The dried helium will be discharged through the gas outlet 11, and the discharged helium will first enter the A-way valve 13 and enter the external gas storage device, and will be tested by the subsequent micro-water meter to determine whether it meets the drying requirements of the helium. During this period, the B-way valve 14 is closed and not connected to the A-way valve 13 and the gas outlet 11. If the helium measured by the micro-water meter does not meet the drying requirements, the A-way valve 13 and the gas inlet 10 are closed, and the heating power of the heating device is adjusted. After a period of continuous heating, the B-way valve 14 is opened, and the helium in the drying tank 1 will be evacuated by the evacuation system connected to the B-way valve 14, and then the A-way valve 13 and the gas inlet 10 are opened to dry the helium.

[0045] Further, such as Figure 3 As shown, a plurality of exhaust holes 20 are obliquely opened on the side wall of the hot air pipe 2 , so that the exhaust direction of the hot air pipe 2 is toward the inner bottom of the drying tank 1 .

[0046] The connection port on the exhaust hole 20 close to one end of the hot air pipe 2 is higher than the connection port on the other end of the exhaust hole 20 connected to the inside of the drying tank 1, so that the exhaust hole 20 is obliquely opened on the side wall of the hot air pipe 2.

[0047] When in use, the helium entering the drying tank 1 through the air inlet 10 will float toward the top of the drying tank 1 because of its lower density than air. During the floating process of the helium, the hot air in the hot air pipe 2 will be discharged from the exhaust hole 20. Driven by the exhaust hole 20 opened at an angle, the gas direction of the hot air and the floating direction of the helium form a certain angle. It is worth noting that in the present embodiment, the exhaust hole 20 is inclined toward the inner bottom side of the drying tank 1, so that the hot air discharged from the hot air pipe 2 can form an effect of hindering the floating helium. In this process, the blowing of the hot air can hinder the floating speed of the helium. On the one hand, it can make the helium stay in the drying tank 1 for a longer time, so that the drying time of the helium is increased, and the dried helium better meets the dryness requirement; on the other hand, the collision between the hot air and the helium can improve the fluidity of the helium in the drying tank 1, which is more conducive to the drying of the helium.

[0048] Further, such as Figure 4 and Figure 5 As shown, it also includes:

[0049] The filter tank 4 has a filter cavity 40 therein, and the filter tank 4 is disposed at the bottom of the drying tank 1, and the filter cavity 40 is connected to the interior of the drying tank 1;

[0050] The filter layer 41 is disposed inside the filter cavity 40 , and a cavity 42 is formed between the filter layer 41 and the inner bottom of the filter tank 4 ;

[0051] The air pump 5 is located at the connection point between the filter chamber 40 and the drying tank 1 and is used to pump the helium filtered in the filter chamber 40 into the interior of the drying tank 1;

[0052] When the filter tank 4 is disposed at the bottom of the drying tank 1 , the air inlet 10 is located on the side wall of the filter tank 4 , so that the air inlet 10 is communicated with the cavity 42 .

[0053] The filter tank 4 is a tank body with an opening, and has a filter cavity 40 connected to the opening inside. The filter layer 41 is arranged inside the filter cavity 40. The filter tank 4 is located at the bottom of the drying tank 1. The filter cavity 40 on the filter tank 4 is connected to the inside of the drying tank 1 through the opening, and is used to remove impurities from the helium entering the drying tank 1 in advance. When the filter layer 41 is arranged in the filter tank 4, there is a gap between the filter layer 41 and the inner bottom of the filter tank 4. This gap forms a cavity 42 between the filter layer 41 and the filter tank 4, which is used for the helium in the air inlet 10 to enter the filter tank 4 and then be filtered and removed by the filter layer 41. It is worth noting that when the filter tank 4 is arranged at the bottom of the drying tank 1, the air inlet 10 originally opened on the drying tank 1 is opened on the side wall of the filter tank 4, so that the air inlet 10 is connected to the cavity 42, and the helium is passed into the cavity 42. An air pump 5 is provided at the connection point between the filter cavity 40 in the filter tank 4 and the inner cavity of the drying tank 1, and the helium after impurity removal and filtration in the filter tank 4 is pumped into the drying tank 1 for drying. The filter layer 41 in this embodiment is specifically two filter plates, both of which are arranged on the inner wall of the filter tank 4, and there is a space for filling the filter material between the two filter plates. In this space, iron filings layer, absorbent cotton layer and activated carbon layer are filled in sequence from bottom to top, and the helium can be treated with impurities in sequence.

[0054] When in use, the helium pipeline passes helium from the air inlet 10 into the cavity 42 in the filter tank 4. The helium entering the cavity 42 is then filtered and removed by the filter layer 41 in the filter tank 4 under the pumping of the air pump 5, and then the helium enters the drying tank 1 for drying.

[0055] Further, such as Figure 6 and Figure 7As shown, a base 43 located in the cavity 42 is provided on the inner wall of the filter tank 4, and the base 43 is arranged close to the air inlet 10. A connecting rod 44 is provided on the base 43, and a baffle 45 is rotatably connected to the connecting rod 44. A torsion spring is sleeved between the baffle 45 and the connecting rod 44 for resetting the baffle 45.

[0056] The base 43 is arranged on the inner wall of the filter tank 4 and is located in the cavity 42 near the side of the air inlet 10. The number of the base 43 is 1-2. The base 43 has a ram horn structure, and the connecting rod 44 is arranged on the ram horn structure. The torsion spring is sleeved on the connecting rod 44. One end of the torsion spring is abutted against the ram horn structure, and the other end is connected to the baffle 45.

[0057] During use, the helium pipeline will touch the baffle 45 located near the air inlet 10 when entering the cavity 42 on the filter tank 4. The helium pipeline will push the baffle 45 open, so that the helium pipeline can pass all the helium into the cavity 42 and be filtered by the filter layer 41.

[0058] Further, such as Figure 7 As shown, a sealing gasket 46 is provided at one end of the baffle 45 that contacts the inner wall of the filter tank 4 .

[0059] When in use, the sealing gasket 46 is made of silicone. After the helium pipeline is removed from the air inlet 10, the baffle 45 returns to its original position, and the sealing gasket 46 on the baffle 45 can cooperate with the baffle 45 to seal the air inlet 10 to prevent outside air from entering the cavity 42 in the filter tank 4 through the air inlet 10.

[0060] Further, such as Figure 1 and Figure 6 As shown, the drying tank 1 is sleeved with an outer cover 3, and the outer cover 3 is provided with recesses 30 corresponding to the air inlet 10 and the through hole 12 respectively.

[0061] When in use, the outer cover 3 is used to wrap the drying tank 1. The outer cover 3 contains insulation material, which is specifically insulation cotton, made of high-purity clay clinker, alumina powder, silica powder, chrome sand and other raw materials. It has the characteristics of light weight, oxidation resistance, low thermal conductivity, good softness, corrosion resistance, small heat capacity and sound insulation, so that the heat loss of the drying tank 1 can be avoided when the drying tank 1 is heated and dried. The opening on the outer cover 3 extends from the side wall of the outer cover 3 from bottom to top to adapt to the use of the air inlet 10. It is worth noting that the outer bottom of the outer cover 3 can be provided with a leg 6, which can support the entire drying tank 1 to leave space for the replacement of the filter tank 4 later.

[0062] Further, such as Figure 6 and Figure 7As shown, a circular ring 15 is provided on the outer bottom of the drying tank 1, the bottom of the drying tank 1 is hollowed out and connected to the hollow middle position of the circular ring 15, a thread is provided on the inner side wall of the circular ring 15, the filter tank 4 is threadedly connected to the circular ring 15, and a connecting port connected to the air inlet 10 is opened on the side wall of the circular ring 15.

[0063] The ring 15 and the drying tank 1 are fixedly connected together at the same center line, and the inner diameter of the ring 15 is less than or equal to the inner diameter of the drying tank 1. A thread is arranged on the inner wall of the ring 15, and a thread groove matching the thread on the inner wall of the ring 15 is arranged on the outer wall of the filter tank 4, so that the filter tank 4 can be threadedly connected to the ring 15, so as to achieve the purpose of being detachable at any time.

[0064] When in use, the staff can install and remove the filter tank 4 at any time by rotating the filter tank 4 on the ring 15, so as to avoid the long-term use of the filter tank 4 and the inability to replace the filter layer 41 in the filter tank 4, which leads to a decrease in impurity removal efficiency.

[0065] Further, such as Figure 6 and Figure 7 As shown, the bottom of the outer cover 3 is hollowed out and a cover plate 7 is threadedly connected thereto.

[0066] The bottom of the outer cover 3 is hollowed out so that the outer cover 3 can be removed from the drying tank 1 , and then the inner space of the outer cover 3 is sealed by the cover plate 7 .

[0067] When in use, after the staff passes the filter tank 4 through the hollow at the bottom of the outer cover 3 and installs it at the bottom of the drying tank 1, the cover plate 7 is then threadedly connected to the hollow at the bottom of the outer cover 3, so that the filter tank 4 and the drying tank 1 are both in the sealed space inside the outer cover 3 to prevent the loss of heating temperature.

[0068] Further, such as Figure 6 As shown, both the filter tank 4 and the cover plate 7 are provided with handles.

[0069] When in use, the handle makes it convenient for the staff to install or take out the cover plate 7 and the filter tank 4.

[0070] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. In the absence of conflicts, the embodiments of the present application and the features in the embodiments may be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A helium drying device, characterized in that: include: A drying tank having an air inlet and an air outlet, the drying tank being provided with a heating device for heating the drying tank, and the drying tank being provided with a through hole connected to the interior thereof; The hot air pipe has a closed end and an open end, wherein the closed end extends to the interior of the drying tank through the through hole, and the open end is located outside the drying tank; a plurality of exhaust holes are provided on the side wall of the hot air pipe, and are distributed circumferentially for connecting the drying tank and the hot air pipe; The open end of the hot air pipe is connected to an external heating pipeline, which is used to transport hot air to the hot air pipe and discharge it into the interior of the drying tank through the exhaust hole.

2. The helium drying device according to claim 1, characterized in that: The plurality of exhaust holes are obliquely opened on the side wall of the hot air pipe, so that the exhaust direction of the hot air pipe is toward the inner bottom of the drying tank.

3. The helium drying device according to claim 2, characterized in that: Also includes: A filter tank having a filter cavity therein, the filter tank is arranged at the bottom of the drying tank, and the filter cavity is connected to the interior of the drying tank; A filter layer is disposed inside the filter cavity, and a cavity is formed between the filter layer and the inner bottom of the filter tank; An air pump, located at the connection point between the filter cavity and the drying tank, and used to pump the helium filtered in the filter cavity into the interior of the drying tank; Wherein, when the filter tank is arranged at the bottom of the drying tank, the air inlet is located on the side wall of the filter tank, so that the air inlet is communicated with the cavity.

4. The helium drying device according to claim 3, characterized in that: A base located in the cavity is provided on the inner wall of the filter tank, and the base is arranged close to the air inlet. A connecting rod is provided on the base, and a baffle is rotatably connected to the connecting rod. A torsion spring is sleeved between the baffle and the connecting rod for resetting the baffle.

5. The helium drying device according to claim 4, characterized in that: A sealing cushion is provided at one end of the baffle plate that contacts the inner wall of the filter tank.

6. The helium drying device according to claim 5, characterized in that: The drying tank is sleeved with an outer cover, and the outer cover is provided with recesses corresponding to the air inlet and the through hole respectively.

7. The helium drying device according to claim 3, characterized in that: A circular ring is provided at the outer bottom of the drying tank, the bottom of the drying tank is hollowed out and communicated with the hollowed-out middle position of the circular ring, a thread is provided on the inner side wall of the circular ring, the filter tank is threadedly connected to the circular ring, and a connecting port connected to the air inlet is opened on the side wall of the circular ring.

8. The helium drying device according to claim 6, characterized in that: The bottom of the outer cover is hollowed out and is threadedly connected with a cover plate.

9. The helium drying device according to claim 8, characterized in that: The filter tank and the cover plate are both provided with handles.

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