阅读说明：本技术 一种低温储罐分子筛吸附装置 (Low temperature storage tank molecular sieve adsorption equipment ) 是由 樊俊峰 铁伟强 王俊峰 刘杰 景绍朋 王会枝 李林波 于 2020-08-11 设计创作，主要内容包括：本发明公开了一种低温储罐分子筛吸附装置,包括：分子筛(12)储存机构,其分子筛(12)储存腔体固定于内封头(16)开口处,所述分子筛(12)储存腔体内填充有分子筛(12),靠近夹层的一侧具有连接孔和与夹层连通的吸附口,所述吸附口处设置有能够破空的箔纸；氮气破空系统,其破空管(5)的出口与所述连接孔连接,进口通过夹层,末端穿出外封头(15)的穿出孔且能够与氮气装置连接；密封机构,所述密封机构能够对所述破空管(5)的进口进行密封。该低温储罐分子筛吸附装置提高了低温储罐内部真空度,保证了低温储罐的绝热性能,为设备稳定运行及安全性能提供良好的保障。(The invention discloses a low-temperature storage tank molecular sieve adsorption device, which comprises: the molecular sieve (12) storage mechanism is characterized in that a molecular sieve (12) storage cavity is fixed at an opening of an inner seal head (16), the molecular sieve (12) is filled in the molecular sieve (12) storage cavity, one side close to an interlayer is provided with a connecting hole and an adsorption port communicated with the interlayer, and foil paper capable of being broken is arranged at the adsorption port; the outlet of the air breaking pipe (5) of the nitrogen air breaking system is connected with the connecting hole, the inlet of the nitrogen air breaking system passes through the interlayer, and the tail end of the nitrogen air breaking system penetrates out of the penetrating hole of the outer end enclosure (15) and can be connected with a nitrogen device; a sealing mechanism capable of sealing the inlet of the hollow-out breaking pipe (5). The molecular sieve adsorption device for the low-temperature storage tank improves the internal vacuum degree of the low-temperature storage tank, ensures the heat insulation performance of the low-temperature storage tank, and provides good guarantee for the stable operation and safety performance of equipment.)

1. The utility model provides a low temperature storage tank molecular sieve adsorption equipment which characterized in that includes:

the molecular sieve (12) storage mechanism is characterized in that a molecular sieve (12) storage cavity is fixed at an opening of an inner seal head (16), the molecular sieve (12) is filled in the molecular sieve (12) storage cavity, one side close to an interlayer is provided with a connecting hole and an adsorption port communicated with the interlayer, and foil paper capable of being broken is arranged at the adsorption port;

the outlet of the air breaking pipe (5) of the nitrogen air breaking system is connected with the connecting hole, the inlet of the nitrogen air breaking system passes through the interlayer, and the tail end of the nitrogen air breaking system penetrates out of the penetrating hole of the outer end enclosure (15) and can be connected with a nitrogen device;

a sealing mechanism capable of sealing the inlet of the hollow-out breaking pipe (5).

2. The cryogenic storage tank molecular sieve adsorption device of claim 1, wherein the molecular sieve (12) storage cavity comprises a shell ring (10) welded at an opening of the inner shell head (16), a shell head body (11) connected to the shell ring (10) and far away from the outer shell head (15), and a partition plate (13) connected to the shell ring (10) and close to the outer shell head (15), and the connection hole and the adsorption port are formed in the partition plate (13).

3. The adsorption device of the molecular sieve of the low-temperature storage tank is characterized in that a filling joint (9) is welded at the adsorption port, a step hole is formed in the middle shaft of the filling joint (9), the foil is laid at the step surface of the step hole through the large hole and the inner surface of the step hole, an internal thread is formed in the large hole of the step hole, a compression nut (6) is connected into the large hole, and the end face of the compression nut (6) is pressed on the foil.

4. The molecular sieve adsorption device of claim 3, further comprising a pore plate (8), wherein the pore plate (8) is pressed on the foil paper, the end face of the compression nut (6) is pressed on the pore plate (8), and the pore plate (8) is provided with a plurality of through holes.

5. The cryogenic storage tank molecular sieve adsorption device of claim 1, wherein an internal joint (14) is welded at the connecting hole, and an outlet of the hollow breaking pipe (5) is welded with the internal joint (14).

6. The molecular sieve adsorption device of the cryogenic storage tank of claim 1, wherein an external joint (4) is welded at a position of a through hole of the outer end enclosure (15), and an inlet of the hollow breaking pipe (5) is welded with the external joint (4).

7. The molecular sieve adsorption device of claim 6, wherein the sealing mechanism comprises a sleeve (2) welded to the outer side of the outer end enclosure (15) and located at the outer joint (4), and a cover plate (3) welded to the outer end of the sleeve (2), and an inlet of the hollow breaking pipe (5) can be sealed in a sealing cavity formed by the sleeve (2), the cover plate (3) and the outer end enclosure (15).

8. The adsorption device for the molecular sieve of the cryogenic storage tank according to claim 7, wherein a reinforcing ring (1) is welded at the position, located at the external joint (4), of the outer end enclosure (15), the casing pipe (2) is welded on the reinforcing ring (1), and an inlet of the hollow breaking pipe (5) can be sealed in a sealing cavity formed by the casing pipe (2), the cover plate (3) and the reinforcing ring (1).

9. The cryogenic storage tank molecular sieve adsorption unit of claim 1 wherein the adsorption port is inclined upward.

10. The cryogenic storage tank molecular sieve adsorption unit of claim 1, wherein the foil is a copper foil (7).

Technical Field

The invention relates to the technical field of molecular sieve adsorption, in particular to a molecular sieve adsorption device for a low-temperature storage tank.

Background

The cryogenic storage tank is a jacketed vacuum powder heat-insulating pressure vessel (liquefied LNG, liquid nitrogen, liquid argon, liquid oxygen, etc.) for storing and supplying cryogenic liquid, and is widely used in industrial production. The liquid in the low-temperature storage tank has the dangerous characteristics of low boiling point, high expansibility, high suffocation and high oxidizing property. It is therefore important to ensure stable operation of the device and safe performance of the device.

At present, most of low-temperature storage tanks manufactured in China pump the vacuum degree in the interlayer to 5Pa at one time, and do not consider the heat insulation performance of the interlayer in transportation, use and maintenance. Therefore, air enters the interlayer through leakage points generated in each link, and the more the air in the interlayer increases along with the increase of the service life of the equipment, the lower the heat insulation performance of the interlayer of the equipment becomes, so that the equipment is scrapped in advance; the liquid in the equipment can be gasified along with the reduction of the heat insulation performance of the interlayer of the equipment, so that the pressure in the equipment is increased, and serious harm is brought to the safety of the equipment.

In conclusion, how to effectively improve the vacuum degree of the interlayer of the low-temperature storage tank and the like is a problem which needs to be solved urgently by the technical personnel in the field at present.

Disclosure of Invention

The invention aims to provide a low-temperature storage tank molecular sieve adsorption device, which improves the internal vacuum degree of a low-temperature storage tank, ensures the heat insulation performance of the low-temperature storage tank, and provides good guarantee for the stable operation and safety performance of equipment.

In order to solve the technical problems, the invention provides the following technical scheme:

a cryogenic storage tank molecular sieve adsorption unit, comprising:

the molecular sieve storage mechanism is characterized in that a molecular sieve storage cavity of the molecular sieve storage mechanism is fixed at an opening of the inner sealing head, a molecular sieve is filled in the molecular sieve storage cavity, one side close to the interlayer is provided with a connecting hole and an adsorption port communicated with the interlayer, and foil paper capable of being broken is arranged at the adsorption port;

the outlet of the hollow breaking pipe of the nitrogen hollow breaking system is connected with the connecting hole, the inlet of the nitrogen hollow breaking system passes through the interlayer, and the tail end of the nitrogen hollow breaking system passes through the penetrating hole of the outer end enclosure and can be connected with a nitrogen device;

and the sealing mechanism can seal the inlet of the hollow pipe.

Preferably, the molecular sieve storage cavity comprises a shell section welded at the opening of the inner seal head, a seal head body connected to the shell section and far away from the outer seal head, and a partition plate connected to the shell section and close to the outer seal head, wherein the connecting hole and the adsorption port are formed in the partition plate.

Preferably, the welding of absorption opening department has the packing to connect, the axis that fills the joint has the step hole, the foil is laid through the macropore and the inner face in step hole step face department in step hole, the macropore in step hole has the internal thread and its internal connection gland nut, gland nut's terminal surface press in on the foil.

Preferably, the paper packaging machine further comprises a pore plate, the pore plate is pressed on the foil paper, the end face of the compression nut is pressed on the pore plate, and the pore plate is provided with a plurality of through holes.

Preferably, an internal joint is welded at the connecting hole, and an outlet of the hollow pipe is welded with the internal joint.

Preferably, an external joint is welded at the position of the penetrating hole of the outer end enclosure, and an inlet of the hollow breaking pipe is connected with the external joint in a welding mode.

Preferably, the sealing mechanism comprises a sleeve welded to the outer side of the outer seal head and located at the outer joint, and a cover plate welded to the outer end of the sleeve, and an inlet of the hollow breaking pipe can be packaged in a sealing cavity formed by the sleeve, the cover plate and the outer seal head.

Preferably, the outer side of the outer end enclosure is located at the outer joint, a reinforcing ring is welded on the outer joint, the sleeve is welded on the reinforcing ring, and an inlet of the hollow breaking pipe can be packaged in a sealing cavity formed by the sleeve, the cover plate and the reinforcing ring.

Preferably, the adsorption port is inclined upward.

Preferably, the foil paper is copper foil paper.

The invention provides a low-temperature storage tank molecular sieve adsorption device, which comprises: the molecular sieve storage cavity of the molecular sieve storage mechanism is fixed at the opening of the inner sealing head, the molecular sieve is filled in the molecular sieve storage cavity, one side close to the interlayer is provided with a connecting hole and an adsorption port communicated with the interlayer, and the adsorption port is provided with foil paper capable of being broken; the outlet of the hollow breaking pipe of the nitrogen hollow breaking system is connected with the connecting hole, the inlet of the nitrogen hollow breaking system passes through the interlayer, and the tail end of the nitrogen hollow breaking system passes through the penetrating hole of the outer end enclosure and can be connected with the nitrogen device; and the sealing mechanism can seal the inlet of the broken hollow pipe.

By applying the technical scheme provided by the embodiment of the invention, the low-temperature storage tank can keep the internal vacuum degree for a long time, so that the heat insulation performance of the low-temperature storage tank is higher, and the running time is longer. In the operation process, the molecular sieve is connected with the interlayer of the storage tank through nitrogen air breaking, the air breaking pipe is sealed, and the activated molecular sieve can further adsorb the gas remained in the interlayer through a vacuumizing measure. In the long-time operation process of the equipment, a small amount of gas possibly entering the interlayer can be adsorbed by the molecular sieve, so that the vacuum degree inside the interlayer meets the relevant specification requirement for a long time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a molecular sieve adsorption device for a cryogenic storage tank according to an embodiment of the present invention;

fig. 2 is a partially enlarged view of a portion a in fig. 1.

The drawings are numbered as follows:

1-reinforcing ring, 2-sleeve, 3-cover plate, 4-external joint, 5-broken hollow pipe, 6-compression nut, 7-copper foil paper, 8-pore plate, 9-filling joint, 10-cylinder section, 11-seal head body, 12-molecular sieve, 13-clapboard, 14-internal joint, 15-external seal head and 16-internal seal head.

Detailed Description

The core of the invention is to provide the molecular sieve adsorption device for the low-temperature storage tank, which improves the internal vacuum degree of the low-temperature storage tank, ensures the heat insulation performance of the low-temperature storage tank and provides good guarantee for the stable operation and safety performance of equipment.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a molecular sieve adsorption device for a cryogenic storage tank according to an embodiment of the present invention; fig. 2 is a partially enlarged view of a portion a in fig. 1.

In a specific embodiment, the present invention provides a molecular sieve adsorption device for a cryogenic storage tank, comprising:

a molecular sieve 12 storage mechanism, wherein a molecular sieve 12 storage cavity is fixed at an opening of an inner seal head 16, the molecular sieve 12 storage cavity is filled with the molecular sieve 12, one side close to an interlayer is provided with a connecting hole and an adsorption port communicated with the interlayer, and the adsorption port is provided with foil paper capable of being broken;

the outlet of the vacuum breaking pipe 5 of the nitrogen vacuum breaking system is connected with the connecting hole, the inlet of the nitrogen vacuum breaking system passes through the interlayer, and the tail end of the nitrogen vacuum breaking system passes through the penetrating hole of the outer end enclosure 15 and can be connected with a nitrogen device;

and the sealing mechanism can seal the inlet of the hollow breaking pipe 5.

In the structure, the molecular sieve adsorption device of the low-temperature storage tank comprises a molecular sieve 12 storage mechanism, a nitrogen gas vacuum breaking system and a sealing mechanism.

The molecular sieve 12 storage mechanism comprises a molecular sieve 12 storage cavity, a molecular sieve 12 and foil paper, wherein the molecular sieve 12 storage cavity is arranged on the inner cylinder body and is fixed at an opening of the inner end enclosure 16, and the molecular sieve 12 storage cavity can be specifically connected to the opening of the inner end enclosure 16 through welding.

The molecular sieve 12 is filled in the storage cavity of the molecular sieve 12, and the molecular sieve 12 has strong gas adsorption and can adsorb 8-10 times of the volume of the molecular sieve 12. The molecular sieve 12 is activated at a high temperature of 300 ℃ to enhance the adsorbability of the molecular sieve 12 gas.

An interlayer is arranged between the inner end enclosure 16 and the outer end enclosure 15, and the interlayer of the low-temperature storage tank is filled with pearl sand to ensure compaction. The molecular sieve 12 storage cavity is provided with a connecting hole and an adsorption port at one side close to the interlayer, and the adsorption port is communicated with the interlayer.

The adsorption port department is provided with the foil that can break empty, and the foil is used for isolated storage tank intermediate layer and molecular sieve 12 storage cavity, and consequently, the foil initial condition is sealed, and the molecular sieve 12 storage cavity that also is in encapsulated situation. The foil paper is the weakest link, and pressurization is carried out in the molecular sieve 12 storage cavity, and the foil paper can explode, so that the molecular sieve 12 in the molecular sieve 12 storage cavity can be connected with the space in the storage tank.

The nitrogen air breaking system comprises an air breaking pipe 5, an outlet of the air breaking pipe 5 is connected with the connecting hole, an inlet of the air breaking pipe passes through the interlayer, a tail end of the air breaking pipe penetrates out of a penetrating hole of the outer end enclosure 15, and the air breaking pipe 5 is a connecting channel between the outside and the molecular sieve 12 storage cavity.

The inlet of the broken hollow pipe 5 penetrates out of the outer end enclosure 15 and then can be connected with the nitrogen device, the molecular sieve 12 does not adsorb nitrogen, the nitrogen device can provide nitrogen heated to 280-300 ℃ by using a nitrogen bottle or a dry nitrogen facility, the pressure is transmitted to the molecular sieve 12 storage cavity through the broken hollow pipe 5, and the pressure is slowly and continuously pressurized until the foil paper is exploded.

After the foil paper explodes, close nitrogen devices such as nitrogen cylinder or dry nitrogen facility, seal the import of breaking empty pipe 5 through sealing mechanism, sealed nitrogen gas import, store the cavity with molecular sieve 12 and isolated with external world, prevent that external gas from breaking empty system and getting into molecular sieve 12 and storing the cavity through nitrogen gas.

It should be noted that the adsorption port of the storage cavity for molecular sieve 12 is a filling port for molecular sieve 12, and the activated molecular sieve 12 can be added into the storage cavity for molecular sieve 12 through the filling joint 9 for molecular sieve 12, so as to realize the filling and replacement of molecular sieve 12, and ensure the regeneration and reuse of the used molecular sieve 12.

Specifically, the method comprises the following steps:

and vacuumizing the storage tank, wherein the vacuum degree is not more than 5 pa.

The sealing mechanism is cut off.

And (3) filling nitrogen heated to 280-300 ℃ into the molecular sieve 12 storage cavity through the hollow breaking pipe 5, so that water and gas in the molecular sieve 12 are separated out.

And vacuumizing the interlayer of the low-temperature storage tank, and pumping out moisture and gas in the interlayer of the storage tank.

And (5) welding the sealing mechanism.

And vacuumizing the interlayer of the low-temperature storage tank, wherein the vacuum degree is not more than 5pa, and thus the regeneration of the molecular sieve 12 is completed.

And after the nitrogen is emptied, sealing the inlet of the emptying pipe 5, and vacuumizing the equipment to reduce the gas adsorbed by the molecular sieve 12 before the equipment runs to the maximum extent. Meanwhile, high-temperature nitrogen is adopted to break the air, so that the temperature in the interlayer is increased, and moisture in the interlayer is discharged.

Air entering the equipment from leakage points generated in the transportation, use and maintenance of the low-temperature storage tank is absorbed by the molecular sieve 12, so that the vacuum degree in the interlayer is ensured to reach the standard.

The vacuum degree in the low-temperature storage tank can reach the standard in the long-term operation process, but the one-time service life of the equipment can be prolonged by 4-5 years.

The maintenance cost is reduced in the using process of the equipment. The pearl sand heat insulation material in the interlayer of the low-temperature storage tank is filled once from 2 years to 4 years.

By applying the technical scheme provided by the embodiment of the invention, the low-temperature storage tank can keep the internal vacuum degree for a long time, so that the heat insulation performance of the low-temperature storage tank is higher, and the running time is longer. In the operation process, the molecular sieve 12 is connected with the interlayer of the storage tank through nitrogen air breaking, the air breaking pipe 5 is sealed, and the activated molecular sieve 12 can further adsorb the gas remained in the interlayer through a vacuumizing measure. In the long-time operation process of the equipment, a small amount of gas possibly entering the interlayer can also be adsorbed by the molecular sieve 12, so that the vacuum degree inside the interlayer meets the relevant specification requirement for a long time.

On the basis of the above specific embodiment, the molecular sieve 12 storage cavity includes the shell ring 10, the head body 11, and the partition plate 13, the head body 11 is connected to the shell ring 10 and is far away from the outer head 15, the partition plate 13 is connected to the shell ring 10 and is close to the outer head 15, and the shell ring 10 is welded to the opening of the inner head 16, so that the molecular sieve 12 storage cavity can be integrally fixed to the opening of the inner head 16.

The molecular sieve 12 storage cavity is manufactured independently, the seal head body 11, the cylinder section 10 and the partition plate 13 are welded with each other firstly, and the seal head body, the cylinder section and the partition plate are integrally welded at an opening of the inner seal head 16, so that the fixing is convenient, the welding is easy, and the sealing performance of the weld joints of the molecular sieve 12 storage cavity and the inner seal head 16 is better.

Preferably, the end socket body 11 can be arc-shaped, the space of the storage cavity of the molecular sieve 12 is increased, the number of the molecular sieves 12 can be relatively increased, and the adsorbability is improved.

The connecting holes and the adsorption ports are formed in the partition plate 13, the partition plate 13 can be a flat plate, the connecting holes and the adsorption ports are easy to form, and the connection of the hollow breaking pipes 5 and the installation of foil paper are convenient.

In another more reliable embodiment, on the basis of any one of the above embodiments, the filling joint 9 is welded at the adsorption port, the middle shaft of the filling joint 9 is provided with a step hole, and the foil paper is laid on the step surface of the step hole through the large hole and the inner surface of the step hole, so that the foil paper is easy to mount.

The big hole of the stepped hole is provided with internal threads, a compression nut 6 is connected in the big hole, the end face of the compression nut 6 is pressed on the foil paper, and the compression nut 6 compresses the foil paper to prevent the displacement of the foil paper before the air is broken from causing the communication between the molecular sieve 12 storage cavity and the interlayer.

The technical scheme is further optimized, the device further comprises a pore plate 8, the pore plate 8 is pressed on the foil paper, the end face of the compression nut 6 is pressed on the pore plate 8, the pore plate 8 is provided with a plurality of through holes, the size of the through holes is small, the molecular sieve 12 cannot pass through the through holes, and the molecular sieve 12 can be prevented from flowing out; meanwhile, the through hole communicates the interlayer of the storage tank with the storage cavity of the molecular sieve 12, and is the only channel for connecting the interlayer of the storage tank with the storage cavity of the molecular sieve 12, so that the molecular sieve 12 can adsorb gas in the interlayer of the storage tank.

It should be noted that the size and the number of the through holes on the orifice plate 8 can be set according to different specific use situations, and are within the protection scope of the present invention.

In another more reliable embodiment, on the basis of any one of the above embodiments, the inner joint 14 is welded at the connecting hole, and the outlet of the blank pipe 5 is welded and connected with the inner joint 14.

Similarly, an external joint 4 is welded at the position of the penetrating hole of the external sealing head 15, and the inlet of the hollow breaking pipe 5 is connected with the external joint 4 in a welding mode.

The inner joint 14 and the outer joint 4 are both an open hole reinforcing structure, and reinforcing elements are added in the area near the open hole for local reinforcement, so that the stress at the edge of the open hole is reduced to the allowable range, and the stress at the edge of the open hole is not increased and the strength is not weakened due to the reduction of the bearing area and the stress concentration after the open hole. The particular inner and outer fittings 4, 14 can be constructed, sized, and made of any suitable material depending on the application.

The blank pipe 5 may be provided longer to facilitate the curved shape.

Further optimize above-mentioned technical scheme, sealing mechanism includes sleeve pipe 2, apron 3, the inner of sleeve pipe 2 welds in the outside of outer head 15, sleeve pipe 2 is located external joint 4 department, sleeve pipe 2 encapsulates internal joint 4, apron 3 welds in the outer end of sleeve pipe 2, apron 3 and outer head 15 constitute sealed chamber, the import of broken hollow tube 5 encapsulates in sealed chamber, the import of broken hollow tube 5 is not communicated with the external world, the import of sealed broken hollow tube 5, stop that the outside gas passes through the broken hollow system of nitrogen gas and gets into molecular sieve 12 and store the cavity. The sealing mechanism has the advantages of simple structure, good sealing performance, convenient cutting of the cover plate 3 and convenient welding.

On the basis of the specific embodiment, the molecular sieve adsorption device of the low-temperature storage tank is changed in a plurality of ways, the reinforcing ring 1 is welded at the position, located at the external joint 4, of the outer end sealing head 15, the sleeve 2 is welded on the reinforcing ring 1, and the inlet of the hollow breaking pipe 5 can be packaged in a sealing cavity formed by the sleeve 2, the cover plate 3 and the reinforcing ring 1. The reinforcing ring 1 also belongs to an open hole reinforcing structure, and a reinforcing element is added in the area near the penetrating hole of the outer end enclosure 15 for further carrying out local reinforcement.

According to the molecular sieve adsorption device for the low-temperature storage tank, under the condition that other parts are not changed, the activated molecular sieve 12 is added into the molecular sieve 12 storage cavity through the adsorption port, the device is normally manufactured on a rotating tire, and the adsorption port is inclined upwards by rotating the position, so that the optimal filling angle of the molecular sieve 12 is achieved.

On the basis of the above embodiments, the foil paper is the copper foil paper 7, and the copper foil paper 7 is adopted, so that the pressure of air breakage can be reduced.

The material kind that can break empty is fine, but some materials need break empty pressure too big, difficult breaking empty. Applying the formula: p_max＝P’[σ]^t/[σ]Can yield [ sigma ]]^tThe smaller the value, P_maxThe smaller the value. Allowable stress [ sigma ] of materials such as Q235A and B, C]^tAllowable stress [ sigma ] of Q345R material at 148MPa]^tAllowable stress [ sigma ] of 189MPa S30408 material]^tAllowable stress [ sigma ] of 137MPa, S30403 material]^tAllowable stress [ sigma ] of S31608 material of 120MPa]^tAllowable stress [ sigma ] of S31603 material at 137MPa]^tIs 120 MPa.

Allowable stress [ sigma ] of aluminum material]^t25MPa, but the reaction takes place in the environment, so the method is not adopted.

Allowable stress [ sigma ] of pure copper material]^tThe pressure is 30MPa, so that the copper foil paper 7 is adopted, the required air breaking pressure is lowest, and the copper performance is stable.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The molecular sieve adsorption device for the low-temperature storage tank provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.