Gas supply system

Abstract

The utility model provides a gas supply system which comprises an input pipeline, and the input pipeline is used for being selectively connected with a liquid gas storage tank in a communicating mode. The vaporizer is selectively arranged at the downstream of the input pipeline in a communicating manner; the compressor is selectively arranged at the downstream of the vaporizer in a communicating manner; the air collecting bag is selectively arranged at the downstream of the compressor in a communicating manner; according to the gas supply system, high-purity liquid argon can be gasified through the vaporizer, then the high-purity liquid argon is pressurized through the compressor and then sent to the gas collection bag, and finally the high-purity liquid argon is conveyed to a laboratory to be used by high-precision analysis equipment, so that by-products of an air separation device can be continuously stabilized, and the production efficiency is improved. The high-precision analysis and assay equipment is simple in structure, lower in cost and lower in cost, and particularly, the gas collecting bag is arranged, so that the pressure buffering effect can be achieved, the supply stability of the gasified argon is guaranteed, and the pressure fluctuation of a pressure pipeline during transient large-flow gas use is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical experimental equipment, and particularly relates to a gas supply system. Background Art

[0002] There are many types of analytical equipment used for analysis and detection. According to the actual analysis items and the types of detectors, the types of gases used are also different, and argon is one of them. For example, argon is used in some gas chromatographic carrier gases, ICP atomic emission spectrometers, atomic absorption spectrometers, etc. Especially, an ICP atomic emission spectrometer consumes 1 bottle (13 Mpa, 40 L) of bottled argon every 4 hours, and the laboratory consumes a large amount of argon.

[0003] Currently, the gas supply method for argon used in laboratory analytical equipment is to purchase bottled argon, and the gas supply method is single. Bottled argon is filled by a third party. On the one hand, this gas supply method has a high procurement cost, increasing the analysis cost. On the other hand, the use of gas cylinders requires analysts to replace the gas cylinders regularly according to the usage amount, increasing the safety risk and labor consumption. In addition, the argon used in analytical equipment is high-purity argon with a purity of ≥ 99.999%. The arrival acceptance of bottled gas filled by a third party can only rely entirely on the manufacturer's certificate, and there are problems with the quality that cannot be guaranteed during the process, posing a threat to the safe and stable operation of high-precision analytical equipment.

[0004] At the same time, coal chemical enterprises are booming, and all coal chemical enterprises are equipped with air separation units. The air separation unit produces air by-products such as liquid oxygen, liquid argon, and liquid nitrogen. High-purity liquid argon is sold externally as a simple by-product. The output of high-purity argon is also quite considerable. For an air separation unit with a production capacity of 56000 Nm 3 / h, its liquid argon output can reach 1400 Nm 3 / h.

[0005] Therefore, it is necessary to design a gas supply system that relies on the advantage of high-purity argon by-produced by the air separation unit of coal chemical enterprises and transports it to the laboratory for use in high-precision analytical equipment. Summary of the Utility Model

[0006] In view of some or all of the above technical problems existing in the prior art, the present utility model provides a gas supply system. The gas supply system relies on the advantage of high-purity argon by-produced by the air separation unit of modern coal chemical enterprises. After gasifying high-purity liquid argon, it can be transported to the laboratory for use in high-precision analytical equipment, so as to solve the problems of single gas supply method for argon in existing analytical equipment, high cost, increased labor consumption, and inability to guarantee quality, and achieve argon supply for high-precision analytical and testing equipment with continuous stability, lower cost, and cost savings.

[0007] According to the present utility model, a gas supply system is provided, including:

[0008] An input pipeline for selectively connecting a cryogenic gas storage tank in a connected manner.

[0009] A vaporizer selectively connected in series downstream of the input pipeline.

[0010] A compressor selectively connected in series downstream of the vaporizer.

[0011] A gas collector selectively connected in series downstream of the compressor.

[0012] An output pipeline selectively connected in series downstream of the gas collector.

[0013] In one embodiment, a branch pipeline is provided between the gas collector and the vaporizer. There are at least two branch pipelines, which are arranged in parallel with each other, and the compressors are arranged in a one-to-one correspondence on each branch pipeline.

[0014] In one embodiment, a first filter is further provided on each branch pipeline upstream of the compressor.

[0015] In one embodiment, a second filter is further provided on each branch pipeline downstream of the compressor.

[0016] In one embodiment, a first one-way valve is further provided on each branch pipeline downstream of the compressor.

[0017] In one embodiment, a first ball valve is provided at both the starting end and the ending end of each branch pipeline.

[0018] In one embodiment, the branch pipeline is connected to the vaporizer through a connecting pipeline, and a second one-way valve and a first stop valve are arranged in sequence from upstream to downstream on the connecting pipeline.

[0019] In one embodiment, an external pipeline is provided between the vaporizer and the second one-way valve, and a second stop valve is provided on the external pipeline.

[0020] In one embodiment, an output pressure reducing valve is provided on the output pipeline.

[0021] In one embodiment, a swing valve and a third stop valve are arranged in sequence from the upstream end to the downstream end of the input pipeline.

[0022] Compared with the prior art, the advantages of the present utility model are as follows: relying on the advantage of by-product high-purity argon gas from the air separation unit of modern coal chemical enterprises, the vaporizer of the gas supply system can vaporize high-purity liquid argon, and then send it to the gas collecting tank after being pressurized by a compressor, and finally transport it to the laboratory for use by high-precision analysis equipment. It can effectively utilize the by-products of the air separation unit, avoid the problems of single argon gas supply method, high cost, increased labor consumption and unguaranteed quality, and can supply argon gas to high-precision analysis and testing equipment continuously, stably, at a lower cost and with cost savings. In particular, by setting up a gas collecting tank, it can play a role in pressure buffering, ensure the stability of the argon gas supply after vaporization, and avoid pressure fluctuations in the pressure pipeline during short-term large-flow gas use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. In the drawings:

[0024] Figure 1 shows a gas supply system according to an embodiment of the present utility model.

[0025] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the technical solutions and advantages of the present utility model clearer, the exemplary embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than an exhaustive list of all embodiments. And without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0027] An embodiment of the present utility model provides a gas supply system. As Figure 1 shown, the gas supply system includes an input pipeline 1, a vaporizer 2, a compressor 3, a gas collecting tank 4 and an output pipeline 5. The input pipeline 1 is used to selectively communicate with the outside, for example, a liquid gas storage tank, for transporting liquid gas to the downstream. The vaporizer 2 is selectively connected in series downstream of the input pipeline 1 for vaporizing the transported liquid gas. The compressor 3 is selectively connected in series downstream of the vaporizer 2 for compressing the gas and increasing the output pressure of the gas. The gas collecting tank 4 is used to receive and store the gas. The output pipeline 5 is selectively connected in series downstream of the gas collecting tank 4 for supplying the gas to the downstream, such as high-precision analysis and testing equipment.

[0028] According to the present application, by designing a gas supply system, by-products of high-purity argon gas produced by a coal chemical gas-liquid air separation unit can be supplied to high-precision analytical and testing equipment. In this process, high-purity liquid argon is vaporized by a vaporizer 2, then pressurized by a compressor 3, and finally stored in a gas collecting tank 4 and ultimately transported to a laboratory for use by high-precision analytical equipment. This gas supply system can effectively utilize the by-products of the air separation unit, avoid the problems of single argon gas supply method, high cost, increased labor consumption, and unguaranteed quality, and can supply argon gas to high-precision analytical and testing equipment continuously, stably, at a lower cost, and with cost savings. In particular, by setting up the gas collecting tank 4, it can play a role in pressure buffering, ensure the stability of the argon gas supply after vaporization, and avoid pressure fluctuations in the pressure pipeline during short-term large-flow gas use.

[0029] For example, the vaporizer 2 is an air-cooled vaporizer, and 20 Nm 3 / h can be selected to achieve the vaporization of liquid argon. For example, the vaporizer 2 can be the E-7518 air-cooled vaporizer produced by Wuxi Scherer Energy Technology Co., Ltd. For example, the compressor 3 is an oil-free gas compressor, and the SMT-Y-2 booster pump of Jinan Simetric Technology Co., Ltd. can be selected. In a specific embodiment, the input pressure of the compressor 3 is approximately 0 and less than or equal to 10 Kpa, while the output pressure is greater than or equal to 1.0 Mpa and less than or equal to 1.2 Mpa. It can be seen that the compressor 3 can greatly increase the pressure of argon gas. The gas collecting tank 4 is mainly used for collecting gas, and its model can be DN80.

[0030] In one embodiment, a branch pipeline 6 is provided between the gas collecting tank 4 and the vaporizer 2. There are at least two branch pipelines 6, for example, two. The different branch pipelines 6 are arranged in parallel. The compressor 3 is arranged in a one-to-one correspondence on each branch pipeline 6, that is to say, there is a compressor 3 on each branch pipeline 6. This setting enables the selective use of the compressor 3. Even if one compressor 3 or other components on the branch pipeline 6 need to be repaired, the other branch pipeline 6 can still ensure the normal operation of the gas supply system.

[0031] A first filter 7 is also provided on each branch pipeline 6. The first filter 7 is located at the upstream end of the compressor 3. The first filter 7 is mainly used to filter solid impurities, prevent solid impurities from entering the compressor 3, maintain the safety of the compressor 3, and extend its service life. For example, the first filter 7 can be a ferrule filter. In addition, the first filter 7 can be the filter with the model SS FT-FC8-0.5um produced by Yancheng Jietuo Fluid Technology Co., Ltd.

[0032] A second filter 8 is also provided on each branch pipeline 6. The second filter 8 is located at the downstream end of the compressor 3. The second filter 8 is a gas filter, mainly used to filter other gases in the gas to ensure that the purity of argon meets the requirements of high-performance OES, ICP, gas chromatography and other laboratory equipment with high requirements for performance and stability in the laboratory. For example, the second filter 8 can be the EA3000 argon purifier of Chengdu Yian Saidi Environmental Protection Technology Co., Ltd., with a flow rate of up to 4NM 3 / h, inlet gas O2 < 1000 ppm, H2O < 1000 ppm, outlet argon purity > 99.9995%. It is easy to understand that, in order to reduce the production cost, there can be one second filter 8, which is used to be provided on each branch pipeline 6, that is to say, multiple branch pipelines 6 share one second filter 8.

[0033] A first one-way valve 9 located at the downstream end of the compressor 3 is also provided on each branch pipeline 6. The first one-way valve 9 is mainly used to make the gas flow unidirectionally from the upstream to the downstream direction, avoiding the reverse flow of the gas.

[0034] First ball valves 10 are provided at both the starting end and the ending end of each branch pipeline 6. It is easy to understand that the first ball valve 10 at the starting end is mainly used to connect or cut off the branch pipeline 6, so that the gas from the upstream can pass through or not pass through the branch pipeline 6. In addition, the first ball valves 10 at the starting end and the ending end are used for maintenance. For example, during the maintenance process, both of these two first ball valves 10 need to be shut off.

[0035] The branch pipeline 6 is connected to the vaporizer 2 through a connecting pipeline 11. In the upstream to downstream direction of the connecting pipeline 11, a second one-way valve 12 and a first stop valve 13 are arranged in sequence. The second one-way valve 12 can ensure the normal flow of the gas and avoid the reverse flow of the gas. The first stop valve 13 can be opened or closed to control whether the gas flows towards the compressor 3. In addition, an external pipeline 14 is provided on the pipeline where the connecting pipeline 11 is connected to the vaporizer 2. A second stop valve 15 is provided on the external pipeline 14. It can be seen that an external pipeline 14 is reserved on this gas supply system, and gas can be supplied to other places that need gas supply through the external pipeline 14. It is easy to understand that the first stop valve 13 and the second stop valve 15 are in a parallel relationship. When the compressor 3 needs to work, the first stop valve 13 is in the open state, while the second stop valve 15 is in the closed state. On the contrary, when other external components need gas supply, the first stop valve 13 is in the closed state, while the second stop valve 15 is in the open state.

[0036] An output pressure reducing valve 16 is provided on the output pipeline 5. This pressure reducing valve 16 is mainly used to reduce the pressure of the gas and ensure a suitable pressure is supplied to the downstream. For example, the pressure of argon gas after being compressed by the compressor 3 is 1.0 Mpa. The gas enters the gas collector 4 and, after passing through the pressure reducing valve 16, the gas pressure can be reduced from 1 Mpa to 0.8 Mpa and then enters the main argon gas supply pipeline of the analysis room. By setting the pressure reducing valve 16, it helps to ensure the constant pressure of the pipeline and avoid pressure fluctuations.

[0037] A second ball valve 17 is also provided on the output pipeline 5. This second ball valve 17 is used to open or close the output pipeline 5, so as to supply the gas in the gas collector 4 to the high-precision analysis equipment in the laboratory or not supply it to the high-precision analysis equipment in the laboratory.

[0038] A swing valve 18 and a third stop valve 19 are successively arranged on the input pipeline 1 in the direction from the upstream end to the downstream end. This swing valve 18 is used for the external interface of the input pipeline 1, which is convenient for direct piping installation and simplifies the construction project. This third stop valve 19 is used to connect or cut off the gas flow to the vaporizer 2.

[0039] A safety valve 20 is connected to the vaporizer 2 in a communicating manner. This safety valve 20 is used to open when the pressure in the vaporizer 2 reaches a preset pressure value, and exhaust gas outward, thereby avoiding overpressure in the vaporizer 2 and ensuring the normal operation of the vaporizer 2. For example, the safety valve 20 can be REG O 1 / 4"10.3 bar from the United States. In addition, the models of each ball valve and stop valve can be selected according to the actual situation.

[0040] Next, according to Figure 1 Describe the working process of the gas supply system in detail.

[0041] The swing valve 18 is connected to, for example, a liquid argon storage tank. Liquid argon enters the third stop valve 19 through the swing valve 18. The third stop valve 19 is opened to allow the liquid argon to enter the vaporizer 3. The liquid argon is changed into gaseous argon in the vaporizer 3. The argon gas successively passes through the second one-way valve 12 and the opened first stop valve 13 and enters at least one branch pipeline 6, where the second stop valve 15 is in the closed state. In the enabled branch pipeline 6, the first ball valves 10 are all opened. The gas passes through the first filter 7 for filtration, and then enters the compressor 3 for compression to increase the gas pressure, and then passes through the first one-way valve 9, and then enters the second filter 8 for further filtration, and is supplied to the gas collector 4. It is easy to understand that in the unenabled branch pipeline 6, the first ball valves 10 are all in the off state. The gas in the gas collector 4 passes through the opened second ball valve 17 and enters the output pressure reducing valve 16. The output pressure reducing valve 16 reduces the pressure of the gas and supplies the gas for use by the high-precision analysis device downstream.

[0042] Although the preferred embodiments of the present utility model have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and / or modifications that fall within the scope of the present utility model. All changes and / or modifications made in accordance with the embodiments of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A gas supply system, characterized in that, Comprising: An input pipeline for selectively and communicatively connecting to a cryogenic gas storage tank, A vaporizer selectively and communicatively arranged downstream of the input pipeline, A compressor selectively and communicatively arranged downstream of the vaporizer, A gas collection header selectively and communicatively arranged downstream of the compressor, An output pipeline selectively and communicatively arranged downstream of the gas collection header.

2. The gas supply system according to claim 1, characterized in that, A branch pipeline is arranged between the gas collection header and the vaporizer. There are at least two branch pipelines, and different branch pipelines are arranged in parallel. The compressors are arranged in a one-to-one correspondence on each branch pipeline.

3. The gas supply system according to claim 2, characterized in that, A first filter is further arranged on each branch pipeline at the upstream end of the compressor.

4. The gas supply system according to claim 2, wherein, A second filter is further arranged on each branch pipeline at the downstream end of the compressor.

5. The air supply system according to claim 2, characterized in that, A first check valve is further arranged on each branch pipeline at the downstream end of the compressor.

6. The gas supply system according to claim 2, characterized in that, A first ball valve is arranged at both the starting end and the ending end of each branch pipeline.

7. The gas supply system according to any one of claims 2 to 6, characterized in that, The branch pipeline is connected to the vaporizer through a connecting pipeline. A second check valve and a first stop valve are sequentially arranged on the connecting pipeline in the upstream-to-downstream direction.

8. The air supply system according to claim 7, characterized in that An external pipeline is arranged between the vaporizer and the second check valve, and a second stop valve is arranged on the external pipeline.

9. The gas supply system according to any one of claims 1 to 6, characterized in that, An output pressure reducing valve is arranged on the output pipeline.

10. The gas supply system according to any one of claims 1 to 6, characterized in that, A swing valve and a third stop valve are sequentially arranged on the input pipeline in the upstream-to-downstream direction.

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