A gas separation device
By pretreating the mixed gas and performing two membrane separations, and utilizing a highly selective permeable separation membrane, the problems of high energy consumption and low efficiency in the separation of hydrogen chloride and hydrogen in the prior art are solved, achieving a low-energy and high-efficiency gas separation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA TONGWEI HIGH PURITY CRYSTAL SILICON CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-05-29
AI Technical Summary
Existing methods for separating hydrogen chloride and hydrogen have problems such as high energy consumption, low separation efficiency, or complex equipment.
The mixed gas is treated with a pretreatment unit to remove dust and water, and then separated by a first separation unit and a second separation unit connected in sequence. The gas is separated twice using a highly selective permeable membrane, and the gas on the permeate side and the non-permeate side are collected respectively.
This method achieves the separation of hydrogen chloride gas and hydrogen gas with simple structure, low energy consumption and high separation efficiency, and obtains pure hydrogen chloride gas and hydrogen gas.
Smart Images
Figure CN224292899U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas separation technology, and specifically to a gas separation device. Background Technology
[0002] In chemical production processes, mixtures of hydrogen chloride gas and hydrogen gas often need to be separated so that subsequent processes can utilize the two gases separately.
[0003] In existing technologies, traditional methods for separating hydrogen chloride and hydrogen include condensation separation and absorption separation, but these methods often suffer from problems such as high energy consumption, low separation efficiency, or complex equipment. Therefore, developing a hydrogen chloride gas and hydrogen gas separation device that is simple in structure, low in energy consumption, and has high separation efficiency is of great significance. Utility Model Content
[0004] The purpose of this invention is to develop a gas separation device that is simple in structure, low in energy consumption, and has high separation efficiency.
[0005] This utility model is achieved through the following technical solution:
[0006] A gas separation device, comprising:
[0007] The preprocessing unit, the first separation unit, and the second separation unit are connected in sequence.
[0008] The pretreatment unit includes a first compressor, a water separator, and a filter connected in sequence. The first separation unit and the second separation unit are membrane separation units. The membrane separation unit includes a sealed container, and a separation membrane is provided inside the sealed container.
[0009] Optionally, the separation membrane divides the sealed container into a separation chamber and a permeation chamber. The separation chamber is located on the inlet side of the sealed container, and the permeation chamber is located on the outlet side of the sealed container. The permeation chamber of the first separation unit sealed container is connected to the separation chamber of the second separation unit sealed container.
[0010] Optionally, a second compressor is also connected to the inlet side of the sealed container.
[0011] Optionally, the device further includes a hydrogen tank and a hydrogen chloride tank, wherein the hydrogen tank is connected to the separation chamber of the first separation unit and the sealed container of the second separation unit, and the hydrogen chloride tank is connected to the permeation chamber of the sealed container of the second separation unit.
[0012] Optionally, the filter includes a filter canister, a U-shaped tube inside the filter canister, and a first filter assembly and a second filter assembly on the U-shaped tube.
[0013] Optionally, the U-shaped tube includes a first pipe section, a rotating section, and a second pipe section connected in sequence. The first pipe section is connected to a water separator, and the second pipe section is connected to a first separation unit. The first pipe section and the second pipe section are parallel. The rotating section is arc-shaped. The first filter assembly and the second filter assembly are arranged in sequence on the first pipe section and the second pipe section according to the airflow direction.
[0014] Optionally, an oil mist separator may be provided on the first or second pipe section between the first filter assembly and the second filter assembly.
[0015] Optionally, the first filter assembly includes a multilayer filter membrane, and the second filter assembly is filled with activated carbon.
[0016] Optionally, both the first and second pipe sections are provided with heating wires on their outer walls.
[0017] Optionally, a drain pipe is connected to the rotary section, the drain pipe extends outside the filter tank, the drain pipe is equipped with a check valve and a valve, and an empty tank is connected to the drain pipe.
[0018] The beneficial effects of this utility model are:
[0019] The pretreatment unit of this invention is used to pretreat the mixed gas, including dust removal and water removal, to ensure the smooth progress of the subsequent separation process. The pretreated mixed gas is then subjected to membrane separation, which makes the separation device simple in structure, low in energy consumption and high in separation efficiency. In the subsequent separation process, the mixed gas is separated twice by the membrane separation unit to collect the gas on the permeate side and the non-permeate side, and obtain pure hydrogen chloride gas and hydrogen gas. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a structural diagram of the present utility model;
[0022] Figure 2 This is a diagram of the filter structure.
[0023] Reference numerals: 1. First compressor; 2. Water separator; 3. Filter; 31. First pipe section; 32. Rotary section; 33. Second pipe section; 34. First filter assembly; 35. Oil mist separator; 36. Second filter assembly; 37. Filter canister; 4. Check valve; 5. Emptying tank; 6. Second compressor; 7. Sealed container; 71. Separation chamber; 72. Permeation chamber; 8. Separation membrane; 9. Hydrogen tank; 10. Hydrogen chloride tank. Detailed Implementation
[0024] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0026] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0028] like Figure 1 and Figure 2 As shown, this utility model discloses a gas separation device, including a pretreatment unit, a first separation unit, and a second separation unit connected in sequence. After the mixture of hydrogen chloride and hydrogen is dehydrated and impurities are removed in the pretreatment unit, it enters the first separation unit and the second separation unit in sequence for separation to obtain hydrogen chloride and hydrogen.
[0029] The pretreatment unit includes a first compressor 1, a water separator 2, and a filter 3 connected in sequence. The water separator 2 contains a desiccant, which is covered by a filter bag that allows airflow and prevents the desiccant from overflowing.
[0030] The filter 3 includes a filter tank 37, which contains a U-shaped tube. The U-shaped tube includes a first pipe section 31, a rotating section 32, and a second pipe section 33 connected in sequence. The first pipe section 31 is connected to the water separator 2, and the second pipe section 33 is connected to the first separation unit. The first pipe section 31 and the second pipe section 33 are parallel. The rotating section 32 is arc-shaped. The mixed gas passes through the first pipe section 31, the rotating section 32, and the second pipe section 33 in sequence.
[0031] Both the first pipe section 31 and the second pipe section 33 are sequentially provided with a first filter assembly 34, an oil mist separator 35, and a second filter assembly 36 in the direction of gas flow. The first filter assembly 34 includes multiple layers of filter membranes, which filter out impurities in the gas mixture. The second filter assembly 36 is filled with activated carbon to further filter out water and impurities.
[0032] Both the outer walls of the first pipe section 31 and the second pipe section 33 are equipped with heating wires, and the heating temperature of the heating wires in the first pipe section 31 and the second pipe section 33 gradually decreases in the direction of gas flow.
[0033] A drain pipe is connected at the slewing section 32. The drain pipe extends outside the filter tank 37. A check valve 4 and a valve are installed on the drain pipe. An empty tank 5 is connected to the drain pipe. The heavy components that have settled at the slewing section 32 can be discharged through the drain pipe.
[0034] The inner wall of the filter tank 37 is also equipped with a heat insulation layer, which can reduce the heat exchange between the inside of the filter tank 37 and the outside, and reduce the power consumption of the heating wire.
[0035] Both the first and second separation units are membrane separation units. Each membrane separation unit includes a sealed container 7, with a second compressor 6 installed on a pipe on the inlet side of the sealed container 7. A separation membrane 8 is installed inside the sealed container 7. The separation membrane 8 has high selective permeability, exhibiting high permeability to hydrogen chloride gas but low permeability to hydrogen gas. The separation membrane 8 divides the sealed container 7 into a separation chamber 71 and a permeation chamber 72. The separation chamber 71 is located closer to the second compressor 6. The second compressor 6 adjusts the pressure difference between the separation chamber 71 and the permeation chamber 72 on both sides of the separation membrane 8. After the mixed gas enters the separation chamber 71, hydrogen chloride gas passes through the separation membrane 8 into the permeation chamber 72, while hydrogen gas is blocked by the separation membrane 8 within the separation chamber 71. The permeation chamber 72 of the sealed container 7 of the first separation unit is connected to the separation chamber 71 of the sealed container of the second separation unit.
[0036] The separation device also includes a hydrogen tank 9 and a hydrogen chloride tank 10. The hydrogen tank 9 is connected to the separation chamber 71 of the first separation unit and the sealed container 7 of the second separation unit. The hydrogen in the separation chamber 71 is fed into the hydrogen tank 9. The hydrogen chloride tank 10 is connected to the permeation chamber 72 of the sealed container 7 of the second separation unit.
[0037] The mixture of hydrogen and hydrogen chloride is pressurized by the first compressor 1 and then sent to the water separator 2. The water separator 2 removes the moisture from the mixture. The mixture then enters the filter 3 and passes sequentially through the first pipe section 31, the rotating section 32, and the second pipe section 33. During the transport in the first pipe section 31 and the second pipe section 33, the temperature is initially high and then decreases. That is, the temperature is highest at the first filter component 34. The high temperature of the filter membrane ensures complete gas vaporization. The temperature is next at the oil mist separator 35 to suppress gas condensation, especially acidic hydrogen chloride, and to avoid equipment blockage. The temperature is lowest at the second filter component 36. The adsorption process is mostly an exothermic reaction, and low temperature (usually 10~50℃) is more conducive to improving adsorption efficiency, especially for particulate matter, oil, or some organic impurities in silane gas. The temperature zoning control described above facilitates impurity volatilization and filtration. After filtration by filter 3, the mixed gas enters the first separation unit. After pressure adjustment by the second compressor 6, it is sent into the separation chamber 71 of the sealed container 7 of the first separation unit. Hydrogen chloride permeates through the separation membrane 8 into the permeation chamber 72, while hydrogen cannot permeate through the separation membrane 8 and is transported to the hydrogen tank 9. The gas in the permeation chamber 72 of the sealed container 7 of the first separation unit enters the second separation unit. After pressure adjustment by the second compressor 6, it is sent into the separation chamber 71 of the sealed container 7 of the second separation unit. The residual hydrogen in the gas cannot permeate through the separation membrane 8 and is transported to the hydrogen tank 9, while hydrogen chloride permeates through the separation membrane 8 into the permeation chamber 72 and is finally transported to the hydrogen chloride tank 10. By opening the valve, the heavy component impurities precipitated in the rotating section 32 can be discharged.
[0038] The pretreatment unit of this invention is used to pretreat the mixed gas, including dust removal and water removal, to ensure the smooth progress of the subsequent separation process. The pretreated mixed gas is then subjected to membrane separation, which makes the separation device simple in structure, low in energy consumption and high in separation efficiency. In the subsequent separation process, the mixed gas is separated twice by the membrane separation unit to collect the gas on the permeate side and the non-permeate side, and obtain pure hydrogen chloride gas and hydrogen gas.
[0039] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.
Claims
1. A gas separation device, characterized in that, include: The preprocessing unit, the first separation unit, and the second separation unit are connected in sequence. The pretreatment unit includes a first compressor, a water separator, and a filter connected in sequence. The first separation unit and the second separation unit are membrane separation units. The membrane separation unit includes a sealed container, and a separation membrane is provided inside the sealed container. The filter includes a filter canister, a U-shaped tube is provided inside the filter canister, and a first filter component and a second filter component are provided on the U-shaped tube; The U-shaped tube includes a first pipe section, a rotating section, and a second pipe section connected in sequence. The first pipe section is connected to the water separator, and the second pipe section is connected to the first separation unit. The first pipe section and the second pipe section are parallel. The rotating section is arc-shaped. The first filter assembly and the second filter assembly are arranged in sequence on the first pipe section and the second pipe section according to the airflow direction. An oil mist separator is also provided on the first or second pipe section between the first filter assembly and the second filter assembly.
2. The gas separation device according to claim 1, characterized in that, The separation membrane divides the sealed container into a separation chamber and a permeation chamber. The separation chamber is located on the inlet side of the sealed container, and the permeation chamber is located on the outlet side of the sealed container. The permeation chamber of the first separation unit sealed container is connected to the separation chamber of the second separation unit sealed container.
3. The gas separation device according to claim 2, characterized in that, A second compressor is also connected to the inlet side of the sealed container.
4. The gas separation device according to claim 3, characterized in that, The device also includes a hydrogen tank and a hydrogen chloride tank. The hydrogen tank is connected to the separation chamber of the first separation unit and the sealed container of the second separation unit, and the hydrogen chloride tank is connected to the permeation chamber of the sealed container of the second separation unit.
5. The gas separation device according to claim 1, characterized in that, The first filter assembly includes a multi-layer filter membrane, and the second filter assembly is filled with activated carbon.
6. The gas separation device according to claim 1, characterized in that, Both the first and second pipe sections are equipped with heating wires on their outer walls.
7. The gas separation device according to claim 1, characterized in that, A drain pipe is connected to the rotary section, extending outside the filter tank. The drain pipe is equipped with a check valve and a valve, and an empty tank is connected to the drain pipe.