CN210102405U

CN210102405U - Molecular sieve package

Info

Publication number: CN210102405U
Application number: CN201920444133.6U
Authority: CN
Inventors: 何晓冬; 李晓峰; 黄勇; 朱关标; 余科元
Original assignee: Zhangjiagang Furui Special Equipment Co Ltd
Current assignee: Zhangjiagang Furui New Energy Technology Co ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2020-02-21
Anticipated expiration: 2029-04-03

Abstract

The utility model discloses a molecular sieve package, include: the molecular sieve is packaged in a packaging bag, and the air release rate of the packaging bag at the normal temperature of 0-25 ℃ is not more than 8.00E-07Pa.m³/(s.g); the air permeability of the packaging bag under the pressure difference of 200Pa is 1000-4000L/(m)²S); the packaging bag filled with the molecular sieve is packaged in a sealing bag, and the sealing bag is vacuumized or filled with inert gas. When the sieve bag is not used, the sealing bag can isolate air, so thatIt cannot adsorb gas; when the molecular sieve packaging bag is used, the sealing bag needs to be torn and peeled off, then the molecular sieve packaging bag is placed in the interlayer, and when the sealing bag is torn off, the molecular sieve is not directly exposed in the air due to the protection of the packaging bag; because the packaging bag has the characteristics of low air release rate and high air permeability, excessive air cannot be generated to destroy the vacuum when the packaging bag is used in a vacuum environment, and the effect of adsorbing impurity gas under the vacuum cannot be reduced due to the isolation of the packaging bag.

Description

Molecular sieve package

Technical Field

The utility model relates to a vacuum cryrogenic insulated container field, concretely relates to be arranged in adsorbing impurity gas so that maintain vacuum molecular sieve package in high vacuum environment.

Background

The vacuum cryogenic heat insulation container is generally of a double-layer structure, a low-temperature medium is stored in an inner layer, an outer layer is in contact with the environment, an interlayer space between the inner layer and the outer layer is a heat insulation layer in a vacuum environment, the super heat insulation performance of the container is realized, and the maintenance of the vacuum environment of the interlayer space is very important.

The molecular sieve is a solid with a porous structure, can quickly adsorb various gas molecules with the pore diameter smaller than the internal pore diameter of the molecular sieve, and is used for adsorbing gas in a high vacuum environment so as to maintain vacuum.

At present, a sealed barrel is usually used as a packaging and transporting means for the molecular sieve, a barrel cover needs to be detached when the molecular sieve is used, then the required molecular sieve is taken, so that the residual molecular sieve in the sealed barrel can be directly exposed in the air, and because the molecular sieve has extremely high adsorption efficiency, the molecular sieve can adsorb a large amount of gas molecules in an extremely short time until the molecular sieve is saturated in adsorption.

The molecular sieve with saturated adsorption can generate desorption phenomenon when the vacuum cryogenic heat-insulating container is vacuumized, namely, gas molecules adsorbed in the molecular sieve are slowly separated out again in vacuum and high-temperature environments, the difficulty and time of vacuumizing are greatly increased, and the energy consumption is increased. The adsorption capacity of the molecular sieve after complete desorption is reduced by more than 20 percent. The molecular sieve with incomplete desorption has the condition that the gas release is larger than the gas suction in the vacuum environment, so that the condition that the high vacuum environment cannot be maintained, even the high vacuum environment is damaged at an accelerated speed occurs.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the molecular sieve bag which can well keep the adsorption performance of the molecular sieve so as to well adsorb impurity gas in a high vacuum environment is provided.

In order to solve the above problem, the utility model discloses the technical scheme who adopts does: a molecular sieve package comprising: a molecular sieve characterized by: the molecular sieve is packaged in a packaging bag with low air release rate and high air permeability, and the air release rate of the packaging bag at the normal temperature of 0-25 ℃ is not more than 8.00E-07Pa.m³/(s.g); the air permeability of the packaging bag under the pressure difference of 200Pa is 1000-4000L/(m)²S); the packaging bag filled with the molecular sieve is packaged in a sealing bag, and the sealing bag is vacuumized or filled with inert gas.

Further, the molecular sieve package described above, wherein: the air permeability of the sealed bag under the pressure difference of 200Pa is less than 1L/(m)².s）。

Further, the molecular sieve package described above, wherein: and vacuumizing the sealed bag.

Further, the molecular sieve package described above, wherein: the air release rate of the packaging bag at 120 ℃ is not more than 4.00E-06Pa.m³/（s.g）。

The utility model has the advantages that: the molecular sieve bag of the utility model can isolate air when not in use, so that the molecular sieve can not adsorb gas, and the adsorption performance of the molecular sieve is ensured; when the molecular sieve bag is used, the peeling sealing bag needs to be torn, then the molecular sieve belt packaging bag is directly placed in the interlayer, and when the sealing bag is torn, the molecular sieve is not directly exposed in the air due to the protection of the packaging bag, so that the adsorption performance of the molecular sieve is ensured; meanwhile, the packaging bag has the characteristics of low air release rate and high air permeability, so that excessive air cannot be generated to destroy vacuum when the packaging bag is used in a vacuum environment, and the effect of adsorbing impurity gas under vacuum cannot be reduced due to isolation of the packaging bag.

Drawings

Fig. 1 is a schematic structural diagram of the molecular sieve package of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.

As shown in fig. 1, a molecular sieve package, comprising: the molecular sieve 1 and the molecular sieve 1 are packaged in a packaging bag 2 with low air release rate and high air permeability, and the air release rate of the packaging bag 2 at the normal temperature of 0-25 ℃ is not more than 8.00E-07Pa.m³/(s.g) the air release rate of the packaging bag at 120 ℃ is not more than 4.00E-06Pa.m³(s.g), the detection standard of the deflation rate adopts GBT31480 aiming at the high-vacuum multilayer heat-insulating material for the deep cooling container, and the excessive deflation rate of the packaging bag 2 causes the excessive deflation of the material, thus being not beneficial to the maintenance of vacuum; the air permeability of the packaging bag 2 under the pressure difference of 200Pa is 1000-4000L/(m)²S), the molecular sieve cannot be effectively protected due to too high air permeability of the packaging bag 2, and the molecular sieve adsorption speed under vacuum is too low due to too low air permeability of the packaging bag 2, which is not beneficial to maintaining vacuum; the packaging bag is customized according to the provided parameters; the packaging bag 2 filled with the molecular sieve 1 is packaged in a sealing bag 3, the sealing bag 3 is vacuumized or filled with inert gas, in the embodiment, the sealing bag 3 is vacuumized, and in actual production, the sealing bag 3 can also be filled with nitrogen. In this embodiment, the air permeability of the sealed bag under a pressure difference of 200Pa should be less than 1L/(m)²S), the smaller the air permeability of the sealed bag, the better.

When the molecular sieve bag is not used, the sealing bag can isolate air, so that the molecular sieve cannot adsorb gas, and the adsorption performance of the molecular sieve is guaranteed; when the molecular sieve bag is used, the peeling sealing bag needs to be torn, then the molecular sieve belt packaging bag is directly placed in the interlayer, and when the sealing bag is torn, the molecular sieve is not directly exposed in the air due to the protection of the packaging bag, so that the adsorption performance of the molecular sieve is ensured; meanwhile, the packaging bag has the characteristics of low air release rate and high air permeability, so that excessive air cannot be generated to destroy vacuum when the packaging bag is used in a vacuum environment, and the effect of adsorbing impurity gas under vacuum cannot be reduced due to isolation of the packaging bag.

Claims

1. A molecular sieve package comprising: a molecular sieve characterized by: the molecular sieve is packaged in a packaging bag with low air release rate and high air permeability, and the air release rate of the packaging bag at the normal temperature of 0-25 ℃ is not more than 8.00E-07Pa.m³/(s.g); the air permeability of the packaging bag under the pressure difference of 200Pa is 1000-4000L/(m)²S); the packaging bag filled with the molecular sieve is packaged in a sealing bag, and the sealing bag is vacuumized or filled with inert gas.

2. The molecular sieve package of claim 1, wherein: the air permeability of the sealed bag under the pressure difference of 200Pa is less than 1L/(m)².s）。

3. The molecular sieve package of claim 1 or 2, characterized in that: and vacuumizing the sealed bag.

4. The molecular sieve package of claim 1 or 2, characterized in that: the air release rate of the packaging bag at 120 ℃ is not more than 4.00E-06Pa.m³/（s.g）。