Ag molecular sieve helium-neon gas separation system with gas pretreatment device

Abstract

The utility model relates to an Ag molecular sieve helium neon gas separation system with gas pretreatment device, including raw material jar, pretreatment module, adsorption bed, helium collection jar and neon collection jar, pretreatment module includes box, first filter, condensation drying module, second filter and heating module are sequentially arranged from left to right in the box, the condensation drying module includes heat exchange copper pipe, the heat exchange copper pipe includes the bight, the liquid inlet of setting in the bight one end and the liquid outlet of setting in the bight other end, the bight is provided with scraper, the scraper is provided with through -hole, the bight passes through through -hole, one side of the scraper is provided with initiative lifting part, and the other side is provided with passive lifting part, the bight below of heat exchange copper pipe is provided with collection box, the utility model can carry out the preliminary impurity removal, drying treatment to the helium neon mixed gas of separation, promotes the effect and efficiency of subsequent adsorption separation.

Description

Technical Field

[0001] This utility model relates to helium-neon gas separation equipment, and in particular to an Ag molecular sieve helium-neon gas separation system with a gas pretreatment device. Background Technology

[0002] Separating helium-neon gas mixtures is an important method for preparing helium and neon. Helium-neon gas mixtures are generally prepared by adsorption using Ag (silver) molecular sieves. By adsorbing neon gas from the helium-neon gas mixture using Ag molecular sieves, high-purity helium gas is obtained. Then, the neon gas in the Ag molecular sieves is released to obtain high-purity neon gas.

[0003] Existing helium-neon separation equipment generally directly adsorbs and separates helium-neon mixed gases. However, in some cases, the helium-neon mixed gas entering the adsorption bed contains some impurities, such as dust brought in from the outlet of the helium-neon gas tube or the pipeline, or moisture in the helium-neon mixed gas. These impurities will lead to a decrease in the effect and efficiency of helium-neon separation. Utility Model Content

[0004] The purpose of this invention is to provide an Ag molecular sieve helium-neon gas separation system with a gas pretreatment device that can reduce impurities in helium-neon mixed gas, optimize helium-neon separation effect, and improve helium-neon separation efficiency.

[0005] The technical solution to achieve the purpose of this utility model is as follows:

[0006] An Ag molecular sieve helium-neon gas separation system with a gas pretreatment device includes a raw material tank, a pretreatment module, an adsorption bed, a helium collection tank, and a neon collection tank. The pretreatment module includes a housing, a first filter, a condensation and drying module, a second filter, and a heating module arranged sequentially from left to right inside the housing. The condensation and drying module includes a heat exchange copper tube, which includes a bend, an inlet at one end of the bend, and an outlet at the other end of the bend. The bend is equipped with a scraper with a through hole through which the bend passes. One side of the scraper has an active lifting part, and the other side has a passive lifting part.

[0007] The active lifting unit includes a first fixed plate fixedly connected to the housing, a stepper motor fixedly on the first fixed plate, a first rotating shaft mounted on the stepper motor, a first sprocket fixedly connected to the first rotating shaft, a second fixed plate fixedly connected to the housing, a second rotating shaft fixedly on the second fixed plate, a second sprocket rotatably connected to the second rotating shaft, and a first transmission chain fitted on the first sprocket and the second sprocket. The first transmission chain meshes with the first sprocket and the second sprocket. A first lifting block is fixedly mounted on the transmission chain, and the first lifting block is fixedly connected to the scraper.

[0008] The passive lifting unit includes a third fixed plate fixedly connected to the housing, a third rotating shaft fixedly on the third fixed plate, a third sprocket rotatably connected to the third rotating shaft, a fourth fixed plate fixedly connected to the housing, a fourth rotating shaft fixedly on the fourth fixed plate, a fourth sprocket rotatably connected to the fourth rotating shaft, and a second transmission chain fitted on the third sprocket and the fourth sprocket. The second transmission chain meshes with the third sprocket and the fourth sprocket. A second lifting block is fixedly mounted on the second transmission chain. The second lifting block is fixedly connected to the scraper.

[0009] A collection box is provided below the bend of the heat exchange copper tube;

[0010] The raw material tank has a discharge pipe and a compressor installed on the discharge pipe. The housing is provided with a first air inlet pipe, which is connected to the compressor. The housing is provided with a first air outlet pipe, which is connected to the adsorption bed. The adsorption bed has a helium gas outlet pipe and a neon gas outlet pipe. The helium gas outlet pipe is connected to a helium gas collection tank, and the neon gas outlet pipe is connected to a neon gas collection tank.

[0011] With the above structure, the helium-neon mixed gas enters the chamber from the raw material tank. It undergoes initial filtration through the first filter, then passes through a heat exchange copper tube. A low-temperature medium, such as a 0°C cryogenic liquid, is introduced into the heat exchange copper tube. Moisture in the helium-neon mixed gas condenses into condensate or ice crystals at the heat exchange copper tube. A stepper motor drives the first sprocket to rotate, which in turn drives the first transmission chain to follow the sprocket's rotation. By switching the stepper motor's forward and reverse rotation, the first lifting block reciprocates up and down through the transmission chain, causing the scraper to reciprocate up and down. During this reciprocating motion, the scraper scrapes the condensate or ice crystals into the collection box. After condensation and drying, the helium-neon mixed gas is filtered through the second filter and then heated by the heating module before being discharged into the adsorption bed for adsorption separation. This invention can pre-treat the helium-neon mixed gas to be separated by removing impurities and drying it, improving the effect and efficiency of subsequent adsorption separation.

[0012] Preferably, in order to drain the water from the collection tank, a water outlet pipe is provided at the bottom of the collection tank, and the end of the water outlet pipe extends out of the tank body.

[0013] Preferably, in order to prevent excessive water in the collection tank, a liquid level sensor is installed in the collection tank, and a water outlet solenoid valve is installed in the water outlet pipe. When the liquid level sensor detects that the liquid level is too high, the water outlet solenoid valve opens to drain the water in the collection tank.

[0014] Preferably, in order to facilitate adjustment of the heating rate of the helium-neon mixture by the heating module, the heating module is an electric heating rod.

[0015] Preferably, to prevent the humidity and temperature of the pretreated helium-neon mixture from failing to meet standards, the chamber is equipped with a circulating outlet pipe, a circulating connecting pipe, a first circulating inlet pipe, and a second circulating inlet pipe. The circulating outlet pipe is connected to the circulating connecting pipe. One end of the first circulating inlet pipe is connected to the circulating connecting pipe, and the other end is connected to the chamber. One end of the second circulating inlet pipe is connected to the circulating connecting pipe, and the other end is connected to the chamber. The circulating outlet pipe is equipped with a first thermometer, a first hygrometer, and a first circulating solenoid valve. The first circulating inlet pipe is equipped with a second solenoid valve. The connection point between the first circulation inlet pipe and the housing is located between the second filter and the heating module. The second circulation inlet pipe is equipped with a third solenoid valve, and the connection point between the second circulation inlet pipe and the housing is located at the end of the housing closer to the first filter. In this way, when the humidity and temperature of the helium-neon mixture are not up to standard, the helium-neon mixture is transported to the first filter through the second circulation inlet pipe for re-filtration, drying, and heating. When only the temperature of the helium-neon mixture is not up to standard, the helium-neon mixture is transported to the heating module through the first circulation inlet pipe for heating.

[0016] Preferably, to facilitate the inspection and replacement of the first and second filters, a connecting plate is provided at the upper end of both the first and second filters. The housing is provided with mounting holes corresponding to the connecting plates, and the mounting holes are provided with steps. The lower surface of the connecting plate abuts against the steps. An mounting plate is provided above the connecting plate, and mounting bolts are provided on the mounting plate. The mounting plate is fixedly connected to the housing by the mounting bolts, and the mounting plate presses the connecting plate tightly onto the steps.

[0017] Preferably, a sealing ring is provided between the connecting plate and the step to ensure the sealing at the mounting hole. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the preprocessing module structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the heat exchange copper tube and scraper of this utility model.

[0022] Figure 4 This is a schematic diagram of the connection plate and mounting holes of this utility model. Detailed Implementation

[0023] like Figures 1 to 4As shown, the Ag molecular sieve helium-neon gas separation system with a gas pretreatment device of this utility model includes a raw material tank 1, a pretreatment module, an adsorption bed 2, a helium collection tank 3, and a neon collection tank 4. The pretreatment module includes a housing 5, a first filter 6, a condensation and drying module, a second filter 7, and a heating module 8 arranged sequentially from left to right inside the housing. The condensation and drying module includes a heat exchange copper tube, which includes a bend 9, an inlet 10 at one end of the bend, and an outlet 11 at the other end of the bend. The bend is equipped with a scraper 12, which has a through hole 13 through which the bend passes. One side of the scraper is equipped with an active lifting part, and the other side... A passive lifting unit is provided on the side; the active lifting unit includes a first fixed plate 14 fixedly connected to the housing, a stepper motor 15 fixedly on the first fixed plate, a first rotating shaft 16 mounted on the stepper motor, a first sprocket 17 fixedly connected to the first rotating shaft, a second fixed plate 18 fixedly connected to the housing, a second rotating shaft 19 fixedly on the second fixed plate, a second sprocket 20 rotatably connected to the second rotating shaft, and a first transmission chain 21 mounted on the first sprocket and the second sprocket. The first transmission chain meshes with the first sprocket and the second sprocket. A first lifting block 212 is fixedly mounted on the transmission chain. The first lifting block is fixedly connected to a scraper. A first position switch 2 is also provided on the first fixed plate. 2. When the first lifting block descends to its lowest position, it contacts the first position switch, the stepper motor stops rotating and then rotates in the opposite direction, and the first lifting block rises. A second position switch 23 is provided on the second fixed plate. When the first lifting block rises to its highest position, it contacts the second position switch, the stepper motor stops rotating and then rotates in the opposite direction, and the first lifting block descends. The passive lifting part includes a third fixed plate 24 fixedly connected to the housing, a third rotating shaft 25 fixedly on the third fixed plate, a third sprocket 26 rotatably connected to the third rotating shaft, a fourth fixed plate 27 fixedly connected to the housing, a fourth rotating shaft 28 fixedly on the fourth fixed plate, a fourth sprocket 29 rotatably connected to the fourth rotating shaft, and a sprocket mounted on the third sprocket. The second transmission chain 30 on the fourth sprocket meshes with the third and fourth sprockets. A second lifting block 31 is fixed on the second transmission chain and is fixedly connected to the scraper. A collection box 32 is provided below the bend of the heat exchange copper tube. The raw material tank has a discharge pipe 33 and a compressor 34 installed on the discharge pipe. The tank body is provided with a first air inlet pipe 35, which is connected to the compressor. The tank body is provided with a first air outlet pipe 36, which is connected to the adsorption bed. The adsorption bed has a helium gas outlet pipe 37 and a neon gas outlet pipe 38. The helium gas outlet pipe is connected to a helium gas collection tank, and the neon gas outlet pipe is connected to a neon gas collection tank.

[0024] In some embodiments, such as Figure 1 and Figure 2As shown, the bottom of the collection box is provided with a water outlet pipe 39, the end of which extends out of the box body. A liquid level sensor 40 is provided inside the collection box, and a water outlet solenoid valve 41 is provided on the water outlet pipe.

[0025] In some embodiments, the heating module is an electric heating rod.

[0026] In some embodiments, such as Figure 1 and Figure 2 As shown, the housing is equipped with a circulating air outlet pipe 42, a circulating connecting pipe 43, a first circulating air inlet pipe 44, and a second circulating air inlet pipe 45. The circulating air outlet pipe is connected to the circulating connecting pipe. One end of the first circulating air inlet pipe is connected to the circulating connecting pipe, and the other end is connected to the housing. One end of the second circulating air inlet pipe is connected to the circulating connecting pipe, and the other end is connected to the housing. The circulating air outlet pipe is equipped with a first thermometer 46, a first hygrometer 47, and a first circulating solenoid valve 48. The first circulating air inlet pipe is equipped with a second solenoid valve 49. The connection point between the first circulating air inlet pipe and the housing is located between the second filter and the heating module. The second circulating air inlet pipe is equipped with a third solenoid valve 50. The connection point between the second circulating air inlet pipe and the housing is located at the end of the housing near the first filter. When both the temperature and humidity of the helium-neon mixed gas are below standard, the first and third circulating solenoid valves are opened. When only the temperature of the helium-neon mixed gas is below standard, the first and second circulating solenoid valves are opened.

[0027] In some embodiments, such as Figure 1 and Figure 2 As shown, a second thermometer 51, a second hygrometer 52, and an air outlet solenoid valve 53 are installed on the first air outlet pipe.

[0028] In some embodiments, such as Figure 4 As shown, the upper ends of the first filter and the second filter are both provided with connecting plates 54. The housing is provided with mounting holes 55 corresponding to the connecting plates. The mounting holes are provided with steps 56. The lower surface of the connecting plate abuts against the steps. The upper part of the connecting plate is provided with a mounting plate 57. The mounting plate is provided with mounting bolts 58. The mounting plate and the housing are fixedly connected by the mounting bolts. The mounting plate presses the connecting plate tightly onto the steps. A sealing ring 59 is provided between the connecting plate and the steps.

[0029] With the above structure, the helium-neon mixed gas enters the chamber from the raw material tank. It undergoes initial filtration through the first filter, then passes through a heat exchange copper tube. A low-temperature medium, such as a 0°C cryogenic liquid, is introduced into the heat exchange copper tube. Moisture in the helium-neon mixed gas condenses into condensate or ice crystals at the heat exchange copper tube. A stepper motor drives the first sprocket to rotate, which in turn drives the first transmission chain to follow the sprocket's rotation. By switching the stepper motor's forward and reverse rotation, the first lifting block reciprocates up and down through the transmission chain, causing the scraper to reciprocate up and down. During this reciprocating motion, the scraper scrapes the condensate or ice crystals into the collection box. After condensation and drying, the helium-neon mixed gas is filtered through the second filter and then heated by the heating module before being discharged into the adsorption bed for adsorption separation. This invention can pre-treat the helium-neon mixed gas to be separated by removing impurities and drying it, improving the effect and efficiency of subsequent adsorption separation.

[0030] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. An Ag molecular sieve helium-neon gas separation system with a gas pretreatment device, characterized in that: The system includes a raw material tank, a pretreatment module, an adsorption bed, a helium collection tank, and a neon collection tank. The pretreatment module includes a housing, a first filter, a condensation drying module, a second filter, and a heating module arranged sequentially from left to right inside the housing. The condensation drying module includes a heat exchange copper tube, which includes a bend, an inlet at one end of the bend, and an outlet at the other end of the bend. The bend is equipped with a scraper with a through hole through which the bend passes. One side of the scraper has an active lifting part, and the other side has a passive lifting part. The active lifting unit includes a first fixed plate fixedly connected to the housing, a stepper motor fixedly on the first fixed plate, a first rotating shaft mounted on the stepper motor, a first sprocket fixedly connected to the first rotating shaft, a second fixed plate fixedly connected to the housing, a second rotating shaft fixedly on the second fixed plate, a second sprocket rotatably connected to the second rotating shaft, and a first transmission chain fitted on the first sprocket and the second sprocket. The first transmission chain meshes with the first sprocket and the second sprocket. A first lifting block is fixedly mounted on the transmission chain, and the first lifting block is fixedly connected to the scraper. The passive lifting unit includes a third fixed plate fixedly connected to the housing, a third rotating shaft fixedly on the third fixed plate, a third sprocket rotatably connected to the third rotating shaft, a fourth fixed plate fixedly connected to the housing, a fourth rotating shaft fixedly on the fourth fixed plate, a fourth sprocket rotatably connected to the fourth rotating shaft, and a second transmission chain fitted on the third sprocket and the fourth sprocket. The second transmission chain meshes with the third sprocket and the fourth sprocket. A second lifting block is fixedly mounted on the second transmission chain. The second lifting block is fixedly connected to the scraper. A collection box is provided below the bend of the heat exchange copper tube; The raw material tank has a discharge pipe and a compressor installed on the discharge pipe. The housing is provided with a first air inlet pipe, which is connected to the compressor. The housing is provided with a first air outlet pipe, which is connected to the adsorption bed. The adsorption bed has a helium gas outlet pipe and a neon gas outlet pipe. The helium gas outlet pipe is connected to a helium gas collection tank, and the neon gas outlet pipe is connected to a neon gas collection tank.

2. The Ag molecular sieve helium-neon gas separation system with a gas pretreatment device according to claim 1, characterized in that: The bottom of the collection box is equipped with a water outlet pipe, the end of which extends out of the box.

3. The Ag molecular sieve helium-neon gas separation system with a gas pretreatment device according to claim 2, characterized in that: The collection tank is equipped with a liquid level sensor, and the water outlet pipe is equipped with a water outlet solenoid valve.

4. The Ag molecular sieve helium-neon gas separation system with a gas pretreatment device according to claim 1, characterized in that: The heating module is an electric heating rod.

5. The Ag molecular sieve helium-neon gas separation system with a gas pretreatment device according to claim 1, characterized in that: The housing is equipped with a circulating air outlet pipe, a circulating connecting pipe, a first circulating air inlet pipe, and a second circulating air inlet pipe. The circulating air outlet pipe is connected to the circulating connecting pipe. One end of the first circulating air inlet pipe is connected to the circulating connecting pipe, and the other end is connected to the housing. One end of the second circulating air inlet pipe is connected to the circulating connecting pipe, and the other end is connected to the housing. The circulating air outlet pipe is equipped with a first thermometer, a first hygrometer, and a first circulating solenoid valve. The first circulating air inlet pipe is equipped with a second solenoid valve. The connection point between the first circulating air inlet pipe and the housing is located between the second filter and the heating module. The second circulating air inlet pipe is equipped with a third solenoid valve. The connection point between the second circulating air inlet pipe and the housing is located at the end of the housing closer to the first filter.

6. The Ag molecular sieve helium-neon gas separation system with a gas pretreatment device according to claim 1, characterized in that: Both the first and second filters have connecting plates at their upper ends. The housing has mounting holes corresponding to the connecting plates, and the mounting holes have steps. The lower surface of the connecting plate abuts against the steps. A mounting plate is provided above the connecting plate, and mounting bolts are provided on the mounting plate. The mounting plate is fixedly connected to the housing by the mounting bolts, and the mounting plate presses the connecting plate tightly onto the steps.

7. The Ag molecular sieve helium-neon gas separation system with a gas pretreatment device according to claim 6, characterized in that: A sealing ring is provided between the connecting plate and the step.

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