Separation and purification device for acetylene dissolved by acetone
Through low-temperature cyclic cooling and U-shaped bent pipe separation operation, combined with a high-pressure dryer, the separation and purification of acetylene gas in acetone solution is solved, and the high-purity purification of acetylene gas and the recycling of acetone solution are realized, which reduces production costs and ensures the safety of the system.
Patent Information
- Application Number
- CN202421854570.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-08-02
AI Technical Summary
In the prior art, the separation and purification of acetylene gas in acetone solution has problems such as strong corrosiveness, high environmental protection treatment costs, and inability to recycle acetone, resulting in increased production costs and safety hazards.
The acetone solution is separated by low-temperature cyclic cooling, and collected and recovered by U-shaped bent pipe liquid separation operation. Combined with a high-pressure desiccant, acetylene gas is purified, and dried using anhydrous calcium chloride or molecular sieve to ensure system safety.
High purity purification of acetylene gas is achieved, the reaction rate is improved, the production cost is reduced, and the recycling of acetone solution is achieved, ensuring the safety and reliability of the system.
Smart Images
Figure CN223159225U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a separation and purification device for acetylene dissolved in acetone, belonging to the field of chemical engineering technology. Specifically, it is a device that uses low-temperature circulating cooling to separate the acetone solution in dissolved acetylene, collects and recovers the separated acetone solution through the liquid separation operation of a U-shaped bend pipe, and purifies acetylene gas through high-pressure drying. Background Art
[0002] Acetylene gas is at risk of violent explosion in the liquid and solid states or in the gaseous state under certain pressures. Factors such as heat, vibration, and electric sparks can all trigger an explosion. Therefore, it cannot be stored or transported after being pressurized and liquefied. Acetylene gas is insoluble in water and soluble in acetone. At 15°C and a total pressure of 15 atmospheres, the solubility of acetylene gas in acetone is relatively large, being 237 g / L, and the solution is stable.
[0003] Therefore, industrially, acetylene gas is pressed into a steel cylinder filled with porous substances such as asbestos (made by combining lightweight and porous activated carbon, wood chips, pumice, and diatomaceous earth, etc.) after the porous substances absorb the acetone solution for storage and transportation. In the presence of the acetone solution, acetylene gas can be stored in the steel cylinder at a very low pressure, with stable and safe storage. The dissolution of acetylene in acetone has been widely used in industry.
[0004] During use, the acetylene gas dissolved in the acetone solution will decompose and flow out through the acetylene cylinder valve. During the outflow process of acetylene gas, some acetone will flow out along with the acetylene gas, resulting in a decrease in the purity of the acetylene gas. When acetylene gas is used as a raw material in the organic synthesis industry, it must be separated and purified. Otherwise, it will cause a decrease in the concentration of acetylene gas in the reaction system and a slowdown in the reaction process at worst; or it will lead to the failure of the organic synthesis reaction or cause safety production accidents. To separate acetone from dissolved acetylene gas, the currently commonly used purification device is to let the dissolved acetylene gas pass through a concentrated sulfuric acid solution to absorb the acetone impurities. The deficiencies of this acetone-dissolved acetylene purification device are as follows: First, due to the strong corrosiveness of concentrated sulfuric acid and it being a precursor for drug production under control, it increases the risk of the process; second, the sulfuric acid needs to be replaced after a certain period of use and treated as hazardous waste, increasing the environmental protection treatment cost; third, the acetone solution absorbed by concentrated sulfuric acid cannot be recycled, increasing the production cost.
[0005] Through retrieval, it can be known that there has been no report on a device that uses low-temperature circulating cooling to separate the acetone solution in dissolved acetylene, collects and recovers the separated acetone solution through the liquid separation operation of a U-shaped bend pipe, and purifies acetylene gas through high-pressure drying. Summary of the Utility Model
[0006] The purpose of the present utility model is to provide a device that utilizes low-temperature circulating cooling to separate the acetone solution in dissolved acetylene, collects and recovers the separated acetone solution through U-shaped bend liquid separation operation, and purifies acetylene gas through high-pressure drying. It can not only purify acetylene gas, but also separate and collect and recover the acetone solution, and the operation process is safe and reliable.
[0007] To achieve the above purpose, the present utility model adopts the following technical solutions: The separation and purification device for acetone-dissolved acetylene includes an acetylene cylinder filled with acetone-dissolved acetylene and a jacket cooler, and the acetylene cylinder and the jacket cooler are connected through a connecting pipe; the jacket cooler is cooled by a constant-temperature circulating water tank to ensure that the temperature of the acetone-dissolved acetylene entering through the intake valve in the jacket cooler is reduced to 2-8 °C, which is far lower than the boiling point of acetone. At this time, acetone is in a liquid state and acetylene is in a gaseous state, so they can be naturally separated; the jacket cooler and the acetone collection tank are connected through a U-shaped bend liquid separation pipeline, and there are two high-pressure glass sight glasses and manual valves on the U-shaped bend liquid separation pipeline to collect and recover the acetone solution through U-shaped bend liquid separation operation; the outlet valve at the top of the jacket cooler is connected to the bottom of the high-pressure dryer through a connecting pipe; the purified acetylene after high-pressure drying enters the acetylene storage tank for storage through the intake valve on the connecting pipe; the acetylene storage tank and the compressor are connected through a connecting pipe; the compressor and the gas-using unit are connected through a connecting pipe, and an acetylene flame retarder is provided; when the gas-using unit uses gas, according to the pressure required by its production process, the compressor compresses the purified acetylene in the storage tank to the corresponding pressure for the production use of the gas-using unit.
[0008] As a further description of the above technical solution:
[0009] Before running this separation and purification device, the nitrogen intake valve should be opened to introduce nitrogen into the system for replacement; after the replacement is qualified, the vacuum pump is run to perform a low-pressure vacuum operation on the system; the above operations not only ensure the high purity of acetylene gas, but also ensure the safety of system operation and avoid the occurrence of production safety accidents.
[0010] As a further description of the above technical solution:
[0011] A gas cylinder pressure reducing valve (0-2.5 MPa for the first stage and 0-0.25 MPa for the second stage) and a cooler intake valve are provided on the connecting pipe between the acetylene cylinder and the jacket cooler.
[0012] As a further description of the above technical solution:
[0013] The outlet pipe of the constant-temperature circulating water tank of the jacket cooler is connected to the lower jacket cavity of the cooler, and the return pipe is output from the upper jacket cavity of the cooler; a cooling water inlet valve and a return water valve are respectively provided on the outlet pipe and the return pipe to control the flow rate of the constant-temperature circulating water.
[0014] As a further description of the above technical solution:
[0015] A thermocouple, an intake valve, and an outlet valve are provided at the top of the jacket cooler described above.
[0016] As a further description of the above technical solution:
[0017] A vent valve is further provided at the top of the acetone collection tank described above.
[0018] As a further description of the above technical solution:
[0019] The liquid separation pipeline described above is provided with a U-shaped bend structure. Its upper part is connected to the bottom of the jacket cooler, and a high-pressure glass sight glass and a manual valve are arranged in sequence; its lower part is connected to the acetone collection tank, and a manual valve is provided.
[0020] As a further description of the above technical solution:
[0021] Before the liquid separation operation of the U-shaped bend pipe, before the liquid separation operation of the U-shaped bend pipe, the manual valve of the first U-shaped bend liquid separation pipe is opened, and the manual valves of the second U-shaped bend liquid separation pipe and the vent valve of the acetone collection tank are closed; through continuous cooling by circulation, when the acetone solution separated in the jacket cooler reaches the liquid level of the high-pressure glass sight glass of the U-shaped bend liquid separation pipeline, the liquid separation operation is carried out. The manual valve of the upper first U-shaped bend liquid separation pipe is closed, and the manual valves of the lower second U-shaped bend liquid separation pipe and the vent valve of the acetone collection tank are opened. The separated acetone solution enters the collection tank; after the liquid separation is completed, the vent valve of the acetone collection tank and the manual valve of the lower second U-shaped bend liquid separation pipe are closed, and the manual valve of the upper first U-shaped bend liquid separation pipe is opened, and then the above liquid separation steps are repeated according to the liquid level situation of the high-pressure glass sight glass for operation.
[0022] As a further description of the above technical solution:
[0023] The high-pressure dryer is filled with anhydrous calcium chloride or molecular sieve.
[0024] As a further description of the above technical solution:
[0025] An acetylene pressure gauge (0 - 2.5 MPa), an intake valve, and an outlet valve are provided at the top of the pure acetylene gas storage tank described above.
[0026] As a further description of the above technical solution:
[0027] The acetylene flame retarder is filled with a high-temperature self-crosslinking copolyester.
[0028] As a further description of the above technical solution:
[0029] The high-pressure glass sight glass is arranged at the same horizontal plane as the manual valve of the second U-shaped bend liquid separation pipe.
[0030] The utility model has the following beneficial effects:
[0031] In the utility model, for the acetone-dissolved acetylene separation and purification device, through low-temperature cycle cooling, the acetone solution in the dissolved acetylene is separated, and the separated acetone solution is collected and recycled through the U-shaped bend liquid separation operation. Moreover, through high-pressure drying, the purity of the acetylene gas is increased. This device can not only purify the acetylene gas, improve the reaction rate, and meet the requirements of the production process, but also separate and collect the acetone solution, reduce the production cost, realize the recycling of resources, and the operation process of this device is safe and reliable, ensuring the safety of the system operation and avoiding the occurrence of production safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is a schematic diagram of the structural assembly principle of the utility model.
[0033] Legend description:
[0034] 1. Nitrogen inlet valve; 2. Acetone-dissolved acetylene gas cylinder; 3. Jacketed cooler; 4. Gas cylinder pressure reducing valve; 5. Cooler inlet valve; 6. Thermocouple; 7. Constant temperature circulating water tank; 8. Cooling water inlet valve; 9. Cooling water return valve; 10. Acetone collection tank; 11. High-pressure glass sight glass; 12. Manual valve of the first U-shaped bend liquid separation pipe; 13. Vent valve; 14. High-pressure dryer; 15. Cooler outlet valve; 16. Acetylene gas storage tank; 17. Inlet valve; 18. Outlet valve; 19. Acetylene pressure gauge; 20. Compressor; 21. Gas using unit; 22. Acetylene flame arrester; 23. Vacuum pump; 24. Manual valve of the second U-shaped bend liquid separation pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0035] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.
[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0037] Referring to Figure 1 , an embodiment provided by the present utility model: The separation and purification device for acetone-dissolved acetylene includes an acetone-dissolved acetylene gas cylinder 2 and a jacket cooler 3. The acetone-dissolved acetylene gas cylinder 2 and the jacket cooler 3 are connected through a connecting pipe; the jacket cooler 3 is cooled by a constant temperature circulating water tank 7 to ensure that the temperature of the acetone-dissolved acetylene entering through the cooler inlet valve 5 in the jacket cooler 3 is reduced to 2-8°C, which is far lower than the boiling point of acetone. At this time, acetone is in a liquid state and acetylene is in a gaseous state, so they can be naturally separated; the jacket cooler 3 and the acetone collection tank 10 are connected through a U-shaped bent liquid separation pipeline, and there are two high-pressure glass sight glasses 11 and U-shaped bent liquid separation pipe manual valves 12 on the U-shaped bent liquid separation pipeline for U-shaped bent pipe liquid separation operation to collect and recover the acetone solution; the cooler outlet valve 15 at the top of the jacket cooler 3 is connected to the bottom of the high-pressure dryer 14 through a connecting pipe; the purified acetylene after high-pressure drying enters the acetylene storage tank 16 for storage through the inlet valve 17 on the connecting pipe; the acetylene storage tank 16 and the compressor 20 are connected through a connecting pipe; the compressor 20 and the gas-using unit 21 are connected through a connecting pipe, and an acetylene flame retarder 22 is provided; when the gas-using unit 21 uses gas, according to the pressure required by its production process, the purified acetylene in the acetylene storage tank 16 is compressed to the corresponding pressure by the compressor 20 for the production use of the gas-using unit 21.
[0038] As an improvement of the present utility model: Before running this separation and purification device, the nitrogen inlet valve 1 should be opened to introduce nitrogen into the system for replacement; after the replacement is qualified, the vacuum pump 23 is run to perform a low-pressure vacuum operation on the system; the above operations not only ensure the high purity of the acetylene gas, but also ensure the safety of the system operation and avoid the occurrence of production safety accidents.
[0039] A gas cylinder pressure reducer 4 with a first stage of 0 - 2.5 MPa and a second stage of 0 - 0.25 MPa and a cooler inlet valve 5 are provided on the connecting pipe between the acetone-dissolved acetylene gas cylinder 2 and the jacket cooler 3.
[0040] The outlet pipe of the constant-temperature circulating water tank 7 of the jacket cooler 3 is connected to the lower jacket cavity of the cooler, and the return pipe is output from the upper jacket cavity of the cooler; a cooling water inlet valve 8 and a cooling water return valve 9 are respectively arranged on the outlet pipe and the return pipe to control the flow rate of the constant-temperature circulating water.
[0041] A thermocouple 6, a cooler inlet valve 5, and a cooler outlet valve 15 are arranged at the top of the jacket cooler 3.
[0042] A vent valve 13 is also arranged at the top of the acetone collection tank 10.
[0043] The liquid separation pipeline is provided with a U-shaped bend structure, the upper part of which is connected to the bottom of the jacket cooler 3, and a high-pressure glass sight glass 11 and a manual valve are successively arranged; the lower part of which is connected to the acetone collection tank 10, and a manual valve is arranged.
[0044] Before the liquid separation operation of the U-shaped bend pipe, the first manual valve 12 of the U-shaped bend liquid separation pipe is opened, and the second manual valve 24 of the U-shaped bend liquid separation pipe and the vent valve 13 of the acetone collection tank are closed; through continuous cooling by circulation, when the acetone solution separated in the jacket cooler 3 reaches the liquid level of the high-pressure glass sight glass 11 of the U-shaped bend liquid separation pipeline, the liquid separation operation is carried out, the first manual valve 12 of the upper U-shaped bend liquid separation pipe is closed, the second manual valve 24 of the lower U-shaped bend liquid separation pipe and the vent valve 13 of the acetone collection tank 10 are opened, and the separated acetone solution enters the collection tank 10; after the liquid separation is completed, the vent valve 13 of the acetone collection tank 10 and the second manual valve 24 of the lower U-shaped bend liquid separation pipe are closed, the first manual valve 12 of the upper U-shaped bend liquid separation pipe is opened, and then the above liquid separation steps are repeated according to the liquid level situation of the high-pressure glass sight glass 11 for operation.
[0045] The high-pressure dryer 14 is filled with anhydrous calcium chloride or molecular sieve.
[0046] A acetylene pressure gauge 19 with a range of 0 - 2.5 MPa, an inlet valve 17, and an outlet valve 18 are arranged at the top of the pure acetylene gas storage tank 16.
[0047] The acetylene flame retarder 22 is filled with a high-temperature self-crosslinking copolyester.
[0048] The high-pressure glass sight glass 11 is arranged at the same horizontal plane as the second manual valve 24 of the U-shaped bend liquid separation pipe.
[0049] Working principle: For the separation and purification device of acetylene dissolved in acetone, nitrogen first enters the jacket cooler 3 through the nitrogen inlet valve 1. Before entering the jacket cooler, the gas in the dissolved acetylene gas cylinder decomposes acetylene and acetone. Subsequently, the dissolved acetone and acetylene enter the jacket cooler 3. Through the cooperation between the jacket cooler 3 and the constant temperature circulating water tank 7, acetone undergoes low-temperature circulating cooling inside. Finally, it flows into the acetone collection tank 10 through the high-pressure glass sight glass 11. The air in the acetone collection tank 10 is released by opening the vent valve 13, thus realizing the purification of acetone. Acetylene enters the high-pressure drying box through the cooler outlet valve 15 for drying and purification processing, and then enters the acetylene storage tank 16 through the inlet valve 17 for storage. The acetylene pressure gauge 19 is used to detect the gas pressure in the tank. Finally, the gas inside the acetylene storage tank 16 is evacuated by the vacuum pump 23 and the compressor 20. After passing through the compressor 20, the acetylene flame arrester 22 is used to block acetylene. Finally, the blocked gas is supplied to the gas supply unit for use. This device can not only purify acetylene gas, improve the reaction rate, and meet the production process requirements, but also separate and collect the recycled acetone solution, reduce the production cost, realize the recycling of resources, and the operation process of this device is safe and reliable, ensuring the safety of the system operation and avoiding the occurrence of production safety accidents.
[0050] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. Separation and purification device for acetylene dissolved in acetone, characterized in that: It includes an acetylene cylinder (2) filled with acetone-dissolved acetylene and a jacket cooler (3). The acetylene cylinder and the jacket cooler (3) are connected through a connecting pipe. The jacket cooler (3) is cooled down by a constant-temperature circulating water tank (7) to ensure that the temperature of the acetone-dissolved acetylene entering through the cooler inlet valve (5) in the jacket cooler (3) is reduced to 2 - 8°C, which is far lower than the boiling point of acetone. At this time, acetone is in a liquid state and acetylene is in a gaseous state, so they can be naturally separated. The jacket cooler (3) and the acetone collection tank (10) are connected through a U-shaped bent liquid separation pipeline. There are two components, a high-pressure glass sight glass (11) and a manual valve, on the U-shaped bent liquid separation pipeline for the liquid separation operation of the U-shaped bent pipe to collect and recycle the acetone solution. The cooler outlet valve (15) at the top of the jacket cooler (3) is connected to the bottom of the high-pressure dryer (14) through a connecting pipe. The purified acetylene after high-pressure drying enters the acetylene storage tank (16) for storage through the inlet valve (17) on the connecting pipe. The acetylene storage tank (16) and the compressor (20) are connected through a connecting pipe. The compressor (20) and the gas-using unit (21) are connected through a connecting pipe, and an acetylene flame retarder (22) is set. When the gas-using unit (21) uses gas, according to the pressure required by its production process, the purified acetylene in the storage tank is compressed to the corresponding pressure by the compressor (20) for the production use of the gas-using unit (21).
2. The acetylene separation and purification device for dissolving acetylene in acetone according to claim 1, wherein: Before operating this separation and purification device, the nitrogen inlet valve (1) should be opened to introduce nitrogen into the system for replacement. After the replacement is qualified, the vacuum pump (23) is operated to perform a low-pressure vacuum operation on the system. The above operations not only ensure the high purity of the acetylene gas but also ensure the safety of the system operation and avoid the occurrence of production safety accidents.
3. The acetylene separation and purification device for acetone dissolution according to claim 1, characterized in that: A cylinder pressure reducing valve (4) and a cooler inlet valve (5) are provided on the connecting pipe between the acetylene cylinder and the jacket cooler (3).
4. The acetylene separation and purification device for dissolving acetylene in acetone according to claim 1, characterized in that: The outlet pipe of the constant-temperature circulating water tank (7) of the jacket cooler (3) is connected to the lower jacket cavity of the cooler, and the return pipe is output from the upper jacket cavity of the cooler. A cooling water inlet valve (8) and a return water valve are respectively set on the outlet pipe and the return pipe to control the flow rate of the constant-temperature circulating water.
5. The acetylene separation and purification device for dissolving acetylene in acetone according to claim 1, wherein: A thermocouple (6), an inlet valve (17), and an outlet valve (18) are provided at the top of the jacket cooler (3).
6. The acetylene separation and purification device for dissolving acetylene in acetone according to claim 1, characterized in that: The liquid separation pipeline is provided with a U-shaped bent structure. Its upper part is connected to the bottom of the jacket cooler (3), and a high-pressure glass sight glass (11) and a manual valve are arranged in sequence. Its lower part is connected to the acetone collection tank (10), and a vent valve (13) is set.
7. The acetylene separation and purification device for dissolving acetylene in acetone according to claim 1, characterized in that: The high-pressure dryer (14) is filled with anhydrous calcium chloride or molecular sieve.
8. The acetylene separation and purification device for dissolving acetylene in acetone according to claim 1, wherein: An acetylene pressure gauge (19), an inlet valve (17), and an outlet valve (18) are provided at the top of the purified acetylene storage tank (16).
9. The acetylene separation and purification device dissolved in acetone according to claim 1, characterized in that: The acetylene flame retarder (22) is filled with a high-temperature self-crosslinking copolyester.