A gas purification device

Abstract

The application discloses a kind of gas purification devices, it is related to gas purification processing technical field.The raw material gas bottle group, low temperature cold trap, cyclone separator, normal temperature adsorber, heavy tower, light tower, raw material gas compressor and raw material gas storage tank are included;Adjusting valve is arranged on the pipeline between the upper outlet end in the normal temperature adsorber and the feed inlet in the middle of heavy tower;Distribution valve is arranged on the pipeline between the lower discharge port of light tower and the inlet end of raw material gas compressor;The distribution valve is connected with adjusting valve by pipeline.The cyclone separator is arranged to separate the particulate impurities in gas, while reducing gas flow rate, so that gas can better contact with normal temperature adsorber, improve the adsorption effect of normal temperature adsorber;By gas utilization shunt, on the one hand, it can dilute impurity gas concentration, facilitate separation, on the other hand, cold energy is utilized again, reduces cold energy consumption, reduces production cost.

Description

Technical Field

[0001] This invention relates to the field of gas purification technology, and in particular to a gas purification device. Background Technology

[0002] The applications of stable isotopes are becoming increasingly widespread, and their separation methods include thermal diffusion, gas diffusion, centrifugation, laser separation, chemical exchange, ion exchange, and distillation. However, currently only cryogenic distillation is suitable for industrial applications. Stable isotopes 13C, 18O, 15N, and 10B are mostly obtained through cryogenic distillation of CO, NO, and BF3. The ideal separation coefficient of 12CO / 13CO in cryogenic CO distillation is 1.01, but in practice it is mostly less than 1.008. Therefore, to enrich 13CO from its natural abundance of 1.11% to 99% 13CO, approximately 3000 theoretical plates are generally required, resulting in very long isotope separation cascades. Furthermore, due to the use of randomly packed packing, the column diameter is generally less than 100 mm, requiring multi-tube columns to scale up production. This makes the actual installation of production equipment quite difficult. When separating isotopes by cryogenic distillation, the cryogenic distillation column is the main equipment investment; during the production process, the reflux ratio is as high as 1000 or more, so cryogenic energy consumption is the main production cost.

[0003] In existing technologies, there are methods for producing and purifying the stable isotope 13CO. Currently, CO purification methods mainly include distillation, adsorption, and membrane separation. Among these, distillation is difficult because O2, N2, and CO have similar boiling points; at the same time, because O2, N2, and CO molecules are similar in size, it is difficult to remove O2 and N2 impurities using adsorption. In the process of transporting and storing high-purity gases, due to the use of steel pipelines and storage tanks, impurities such as CO2, Fe, and Ni metal ions are continuously formed in the system. Due to limitations in technological development, current membrane separation methods can only separate substances with significantly different molecular sizes from CO, such as H2, and cannot achieve the separation of CO from O2 and N2, making CO purification difficult and resulting in insufficient purification efficiency. Chinese Patent Publication No. CN115301040A discloses a 13CO isotope separation tail gas purification device, comprising, in sequence, a first diaphragm compressor, a dehydration tower, an adsorption tower, a light-weight gas removal tower, a dust collector, a first filter, a heavy-weight gas removal tower connected to the bottom of the light-weight gas removal tower, a second filter connected to the top of the heavy-weight gas removal tower, and a second diaphragm compressor connected to the second filter and outputting the CO purified product; the device pressurizes and removes water from the CO tail gas to be purified, and adsorbs and removes gaseous impurities of a predetermined type from the tail gas; the adsorbed tail gas is then filtered and dusted; the filtered tail gas is then distilled through the light-weight gas removal tower and the heavy-weight gas removal tower; the distilled gas is then filtered and compressed to obtain the CO purified product. The aforementioned device has a complex structure, high cold energy consumption, and high purification difficulty; at the same time, the distillation tower has low utilization, resulting in high production costs and low production capacity. Summary of the Invention

[0004] The main objective of this invention is to provide a gas purification device to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides a gas purification device, comprising a raw material gas cylinder group, a cryogenic cold trap, a cyclone separator, a room temperature adsorber, a heavy-weight removal tower, a light-weight removal tower, a raw material gas compressor, and a raw material gas storage tank; the outlet end of the raw material gas cylinder group is connected to the inlet end of the cryogenic cold trap at the upper left of the cylinder via a pipe; the pipe extends into the liquid nitrogen zone inside the cryogenic cold trap, which is filled with activated carbon packing made of coconut shells to adsorb carbon dioxide and water impurities in the raw material gas; a heating wire is installed directly below the cryogenic cold trap, and a heating pump is connected below the wire; the middle outlet end of the cryogenic cold trap is connected to the inlet end of the cyclone separator via a pipe; the outlet end of the cyclone separator... The system is connected to the inlet of the ambient temperature adsorber via a pipeline. The upper outlet of the ambient temperature adsorber is connected to the feed inlet in the middle of the heavy weight removal tower via a pipeline. The upper outlet of the heavy weight removal tower is connected to the feed inlet in the middle of the light weight removal tower via a pipeline. The lower outlet of the light weight removal tower is connected to the inlet of the feed gas compressor via a pipeline. The outlet of the feed gas compressor is connected to the inlet of the feed gas storage tank via a pipeline. A regulating valve is installed on the pipeline between the upper outlet of the ambient temperature adsorber and the feed inlet in the middle of the heavy weight removal tower. A distribution valve is installed on the pipeline between the lower outlet of the light weight removal tower and the inlet of the feed gas compressor. The distribution valve and the regulating valve are connected via a pipeline.

[0006] Furthermore, multiple cyclone separators are provided.

[0007] Furthermore, a pressure pump is installed on the pipeline between the distribution valve and the regulating valve.

[0008] Furthermore, multiple raw material gas storage tanks are provided, and the multiple raw material gas storage tanks are connected in series through pipelines.

[0009] The present invention has the following beneficial effects:

[0010] This invention separates particulate impurities in gas by setting up a cyclone separator, while reducing the gas flow rate so that the gas can better contact the room temperature adsorber and improve the adsorption effect of the room temperature adsorber. By utilizing gas diversion, the concentration of impurity gas can be diluted to facilitate separation, and the cold energy can be reused to reduce cold energy consumption and lower production costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a gas purification device according to the present invention.

[0012] Among them, 1-raw material gas cylinder group; 2-low temperature cold trap; 3-cyclone separator; 4-normal temperature adsorber; 5-regulating valve; 6-heavy removal tower; 7-light removal tower; 8-raw material gas compressor; 9-raw material gas storage tank; 10-distribution valve; 11-pressurization pump; 21-liquid nitrogen zone; 22-heating mesh wire; 23-heating pump. Detailed Implementation

[0013] To achieve the above objectives and effects, the technical means and structure adopted by the present invention will be described in detail with reference to the accompanying drawings, focusing on the features and functions of the preferred embodiments of the present invention.

[0014] like Figure 1 As shown, this invention provides a gas purification device, including a raw material gas cylinder group 1, a cryogenic cold trap 2, a cyclone separator 3, a room temperature adsorber 4, a heavy-weight removal tower 6, a light-weight removal tower 7, a raw material gas compressor 8, and a raw material gas storage tank 9. The outlet end of the raw material gas cylinder group 1 is connected to the inlet end of the cryogenic cold trap 2 at the upper left of the outlet end via a pipe. The pipe extends into the liquid nitrogen zone 21 inside the cryogenic cold trap, which is filled with activated carbon packing made of coconut shells to adsorb carbon dioxide and water impurities in the raw material gas. A gas storage tank 9 is located directly below the cryogenic cold trap 2. A heating wire mesh 22 is installed, and a heating pump 23 is connected to the bottom of the heating wire mesh 22. The middle outlet end of the low-temperature cold trap 2 is connected to the inlet end of the cyclone separator 3 through a pipeline; the outlet end of the cyclone separator 3 is connected to the inlet end of the ambient temperature adsorber 4 through a pipeline; the cyclone separator 3 separates particulate impurities in the gas and reduces the gas flow rate, so that the gas can better contact the ambient temperature adsorber 4, thereby improving the adsorption effect of the ambient temperature adsorber 4; the upper outlet end of the ambient temperature adsorber 4 is connected to the feed inlet in the middle of the deweighting tower 6 through a pipeline. The upper outlet of the heavy removal tower 6 is connected to the feed inlet of the middle section of the light removal tower 7 via a pipeline; impurities in the gas source are separated through distillation in the heavy removal tower 6 and the light removal tower 7; the lower outlet of the light removal tower 7 is connected to the inlet of the raw material gas compressor 8 via a pipeline, and the outlet of the raw material gas compressor 8 is connected to the inlet of the raw material gas storage tank 9; a regulating valve 5 is installed on the pipeline between the upper outlet of the ambient temperature adsorber 4 and the feed inlet of the middle section of the heavy removal tower 6; the lower outlet of the light removal tower 7 is connected to the raw material gas... A distribution valve 10 is installed on the pipeline between the inlet end of the compressor 8 and the regulating valve 5. The distribution valve 10 is connected to the regulating valve 5 through a pipeline. The gas separated from the light gas removal tower 7 is distributed by the distribution valve 10. Part of the gas is compressed by the raw material gas compressor 8 and enters the raw material gas storage tank 9 for storage. The other part of the gas enters the regulating valve 5 and is mixed with the gas flowing out from the ambient temperature adsorber 4 before entering the heavy gas removal tower 6. On the one hand, this can dilute the concentration of impurity gas and facilitate separation. On the other hand, it can reuse cold energy, reduce cold energy consumption, and reduce production costs.

[0015] In another embodiment, multiple cyclone separators 3 are provided to enhance the separation effect of particulate impurities and the speed reduction effect.

[0016] In another embodiment, a pressure pump 11 is provided on the pipeline between the distribution valve 10 and the regulating valve 5 to ensure the gas flow direction and mixing effect.

[0017] In another embodiment, multiple raw material gas storage tanks 9 are provided, and the multiple raw material gas storage tanks 9 are connected in series by pipelines to ensure that all the purified gas can be stored.

[0018] The above description is only a preferred embodiment of the present invention and not all embodiments. Anyone should know that structural changes made under the guidance of the present invention, and any technical solutions that are the same as or similar to the present invention, are within the protection scope of the present invention.

Claims

1. A gas purification device, characterized in that, The system includes a feed gas cylinder assembly, a cryogenic cold trap, a cyclone separator, a room-temperature adsorber, a heavy-weight removal tower, a light-weight removal tower, a feed gas compressor, and a feed gas storage tank. The outlet of the feed gas cylinder assembly is connected to the inlet of the cryogenic cold trap at its upper left position via a pipe. The pipe extends into a liquid nitrogen zone inside the cryogenic cold trap, which is filled with activated carbon packing made from coconut shells to adsorb carbon dioxide and water impurities from the feed gas. A heating wire is installed directly below the cryogenic cold trap, with a heating pump connected below it. The middle outlet of the cryogenic cold trap is connected to the inlet of the cyclone separator via a pipe. The outlet of the cyclone separator is connected to the inlet of the room-temperature adsorber via a pipe. The upper outlet of the adsorber is connected to the feed inlet in the middle of the heavy-duty removal tower via a pipeline. The upper outlet of the heavy-duty removal tower is connected to the feed inlet in the middle of the light-duty removal tower via a pipeline. The lower outlet of the light-duty removal tower is connected to the inlet of the raw material gas compressor via a pipeline. The outlet of the raw material gas compressor is connected to the inlet of the raw material gas storage tank. A regulating valve is installed on the pipeline between the upper outlet of the adsorber and the feed inlet in the middle of the heavy-duty removal tower. A distribution valve is installed on the pipeline between the lower outlet of the light-duty removal tower and the inlet of the raw material gas compressor. The distribution valve and the regulating valve are connected via a pipeline. A pressure pump is installed on the pipeline between the distribution valve and the regulating valve.

2. The gas purification device as described in claim 1, characterized in that, Multiple cyclone separators are provided.

3. A gas purification device as described in claim 1 or 2, characterized in that, The raw material gas storage tanks are provided in multiple ways, and the multiple raw material gas storage tanks are connected in series by pipelines.

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