A propylene purification device for liquefied petroleum gas

Abstract

The utility model relates to the field of liquefied petroleum gas processing especially relates to a propylene purification device for liquefied petroleum gas, including filter cartridge, petroleum import, water pump, first processing cartridge and refrigerator etc., the petroleum import is connected to filter cartridge upper portion front side, the water pump is connected to filter cartridge right part, the first processing cartridge is connected to filter cartridge right side, the refrigerator is connected to first processing cartridge upside. The utility model discloses through filter plate to the impurity filtration, through the heating wire in the first processing cartridge to the liquid heating, makes propylene and propane rise and enter the refrigerator and condenses, and then flows into the second processing cartridge and adds the extractant and heats, makes propane and propylene separate after heating, makes propylene gasification be activated carbon adsorption, makes the extractant flow back second processing cartridge and continue to use, thereby can separate the purification of propylene and propane in the liquefied petroleum gas, and realizes the recycling of extractant at the same time, reduces the purification cost, saves the resources, improves the processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of liquefied petroleum gas processing, and in particular to a propylene purification device for liquefied petroleum gas. Background Technology

[0002] Liquefied petroleum gas (LPG) is an important energy source and chemical raw material with wide applications in industrial production and daily life. Propylene and propane are key components of LPG. Propylene is a basic raw material for the production of many important chemical products such as polypropylene, acrylonitrile, and propylene oxide. In addition to being used as fuel, propane is also an important raw material for the production of chemical products such as propylene and acrylic acid.

[0003] Existing methods for propylene purification from liquefied petroleum gas (LPG) typically involve a combination of distillation and rectification to separate and purify propylene and propane. However, during extractive distillation, specific extractants are required to alter the relative volatility of propylene and propane in the gas and liquid phases to achieve separation. Most current equipment struggles to recycle these extractants, which are often lost along with the products during separation, resulting in significant extractant consumption, increased purification costs, and reduced processing efficiency.

[0004] Therefore, it is necessary to design a propylene purification device for liquefied petroleum gas that can separately purify propylene and propane in liquefied petroleum gas while recycling the extractant, thereby reducing purification costs, saving resources, and improving processing efficiency. Utility Model Content

[0005] To overcome the drawbacks of current equipment, which requires the addition of specific extractants to alter the relative volatility of propylene and propane in the gas and liquid phases during extractive distillation to achieve separation, most existing equipment struggles to recycle the extractants. The extractants are often lost along with the products during separation, leading to high consumption, increased purification costs, and reduced processing efficiency. This invention provides a propylene purification device for liquefied petroleum gas (LPG) that can simultaneously purify propylene and propane separately while recycling the extractant, thereby reducing purification costs, saving resources, and improving processing efficiency.

[0006] The technical solution is as follows: A propylene purification device for liquefied petroleum gas includes a filter cylinder, an oil inlet, a water pump, a first processing cylinder, a cooler, a filter plate, a drain port, an extraction component, a pressure swing adsorption (PSA) component, and a fixing component. The oil inlet is connected to the upper front side of the filter cylinder, the water pump is connected to the right side of the filter cylinder, the first processing cylinder is connected to the right side of the filter cylinder, the cooler is connected to the upper side of the first processing cylinder, the filter plate is slidably engaged at the upper part of the filter cylinder, the drain port is connected to the lower side of the first processing cylinder, the extraction component for extracting propane is provided on the right side of the cooler, the PSA component for adsorbing and extracting propylene is provided on the extraction component, and the fixing component for fixing the filter plate is provided on both the filter cylinder and the PSA component.

[0007] Furthermore, it also includes valves, with valves installed on the drain outlet.

[0008] Furthermore, the extraction assembly includes a second processing cylinder, a propane outlet, a separation cylinder, a circulation pipe, an extractant inlet, and heating wires. The second processing cylinder is connected to the right side of the cooler. The propane outlet is connected to the upper right side of the second processing cylinder. The circulation pipe is connected to the lower side of the second processing cylinder, and a water pump is also connected to the circulation pipe. The separation cylinder is connected to the rear side of the circulation pipe. The extractant inlet is connected to the upper rear side of the second processing cylinder, and a water pump is also connected to the extractant inlet. The water pump at the extractant inlet is connected to the separation cylinder. Heating wires are connected inside the first processing cylinder, the second processing cylinder, and the separation cylinder.

[0009] Furthermore, the pressure swing adsorption assembly includes an adsorption cylinder, an outlet, and a vacuum pump. The adsorption cylinder is connected to the rear side of the separation cylinder, and a filter plate is also slidably snapped onto the upper part of the adsorption cylinder. The outlet is connected to the rear side of the upper part of the adsorption cylinder, and the vacuum pump is connected to the lower right side of the adsorption cylinder.

[0010] Furthermore, each filter plate is equipped with a handle.

[0011] Furthermore, the fixing component includes clamping blocks and torsion springs. Clamping blocks are rotatably connected to both the filter cylinder and the adsorption cylinder. A torsion spring is connected between the rear clamping block and the adsorption cylinder, and a torsion spring is also connected between the front clamping block and the filter cylinder.

[0012] The beneficial effects are as follows: 1. This utility model filters impurities through a filter plate and heats the liquid through a heating wire in the first processing cylinder, causing propylene and propane to rise and enter the refrigerator for condensation. Then, they flow into the second processing cylinder, where an extractant is added and heated to separate the propane and propylene. The propylene is then vaporized and adsorbed by activated carbon, allowing the extractant to flow back into the second processing cylinder for continued use. This allows for the separate purification of propylene and propane in liquefied petroleum gas while simultaneously recycling the extractant, reducing purification costs, saving resources, and improving processing efficiency.

[0013] 2. This utility model uses a rotating clamp to deform the torsion spring, which then removes the filter plate containing activated carbon. The filter plate on the filter cylinder is then removed to clean impurities. The activated carbon is then further processed to separate and extract the propylene. The filter plate is then reinstalled. This allows for the installation of filter plates for activated carbon adsorption and filtration, facilitating impurity cleaning, activated carbon replacement, and filter plate loading, unloading, and replacement. It is convenient to use. Attached Figure Description

[0014] Figure 1 This is a frontal three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the bottom three-dimensional structure of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the filter cylinder and filter plate components of this utility model.

[0017] Figure 4 This is a three-dimensional cross-sectional view of the heating wire and other components of this utility model.

[0018] Component names and serial numbers in the diagram: 1_Filter cartridge, 2_Oil inlet, 3_Water pump, 4_First processing cartridge, 41_Refrigerator, 5_Second processing cartridge, 6_Propane outlet, 7_Separation cartridge, 8_Adsorption cartridge, 9_Discharge outlet, 10_Vacuum pump, 11_Circulation pipe, 12_Extractant inlet, 13_Filter plate, 14_Clamping block, 15_Torsion spring, 16_Heating wire, 17_Drain outlet, 18_Valve. Detailed Implementation

[0019] The preferred technical solution of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] A propylene purification device for liquefied petroleum gas, such as Figures 1-4 As shown, the system includes a filter cylinder 1, an oil inlet 2, a water pump 3, a first processing cylinder 4, a cooler 41, a filter plate 13, a drain port 17, a valve 18, an extraction assembly, a pressure swing adsorption assembly, and a fixing assembly. The oil inlet 2 is connected to the upper front side of the filter cylinder 1, the water pump 3 is connected to the right side of the filter cylinder 1, the first processing cylinder 4 is connected to the right side of the filter cylinder 1, the cooler 41 is connected to the upper side of the first processing cylinder 4, the filter plate 13 is slidably clipped onto the upper part of the filter cylinder 1, the drain port 17 is connected to the lower side of the first processing cylinder 4, and a valve 18 is provided on the drain port 17 to facilitate the control of material discharge. An extraction assembly for extracting propane is provided on the right side of the cooler 41, and a pressure swing adsorption assembly for adsorbing and extracting propylene is provided on the extraction assembly. Both the filter cylinder 1 and the pressure swing adsorption assembly are provided with fixing assemblies for fixing the filter plate 13.

[0021] like Figure 1 , Figure 2 and Figure 4 As shown, the extraction assembly includes a second processing cylinder 5, a propane outlet 6, a separation cylinder 7, a circulation pipe 11, an extractant inlet 12, and a heating wire 16. The second processing cylinder 5 is connected to the right side of the cooler 41. The propane outlet 6 is connected to the upper right side of the second processing cylinder 5. The circulation pipe 11 is connected to the lower side of the second processing cylinder 5. A water pump 3 is also connected to the circulation pipe 11. The separation cylinder 7 is connected to the rear side of the circulation pipe 11. The extractant inlet 12 is connected to the upper rear side of the second processing cylinder 5. A water pump 3 is also connected to the extractant inlet 12. The water pump 3 on the extractant inlet 12 is connected to the separation cylinder 7. Heating wires 16 are connected inside the first processing cylinder 4, the second processing cylinder 5, and the separation cylinder 7.

[0022] like Figure 1 As shown, the pressure swing adsorption assembly includes an adsorption cylinder 8, an outlet 9, and a vacuum pump 10. The adsorption cylinder 8 is connected to the rear side of the separation cylinder 7. A filter plate 13 is also slidably attached to the upper part of the adsorption cylinder 8. Each filter plate 13 is provided with a handle to facilitate hand gripping and moving the filter plate 13 for removal. The outlet 9 is connected to the rear side of the upper part of the adsorption cylinder 8, and the vacuum pump 10 is connected to the lower right side of the adsorption cylinder 8.

[0023] like Figure 3 As shown, the fixing assembly includes a clamping block 14 and a torsion spring 15. The clamping block 14 is rotatably connected to both the filter cylinder 1 and the adsorption cylinder 8. The rear clamping block 14 is connected to the adsorption cylinder 8 by a torsion spring 15, and the front clamping block 14 is also connected to the filter cylinder 1 by a torsion spring 15.

[0024] This device can be used to purify propylene in liquefied petroleum gas (LPG). The filter cylinder 1, first processing cylinder 4, second processing cylinder 5, separation cylinder 7, and adsorption cylinder 8 are brought into contact with the ground. Then, the clamping block 14 is rotated, causing the torsion spring 15 to deform. The filter plate 13 is then lifted using the handle and brought into contact with the filter cylinder 1. The filter plate 13, containing activated carbon, is then brought into contact with the adsorption cylinder 8. The filter plate 13 is then moved and installed. The clamping block 14 is then released, causing the torsion spring 15 to rotate back to its original position. The clamping block 14 rotates in the opposite direction to reset and contact the filter plate 13 for fixation. Finally, an LPG delivery pipeline is connected to the oil inlet 2, allowing the propylene to be transported to the LPG source. Petroleum gas enters the filter cartridge 1 through the oil inlet 2 and flows through the filter plate 13 for filtration, leaving impurities on the filter plate 13. The liquid flows into the lower part of the filter cartridge 1, and then the water pump 3 is started, causing the liquid to flow into the first processing cartridge 4. The heating wire 16 in the first processing cartridge 4 heats the liquid, causing the heavier components to remain in the first processing cartridge 4. Propylene and propane preferentially rise and enter the cooler 41 to condense into liquid, which then flows into the second processing cartridge 5. Then, the valve 18 is turned to open, allowing the heavier components to be discharged from the drain port 17. The valve 18 is then turned to close, and then the extractant is introduced from the propane... Propylene enters the second processing cylinder 5 through outlet 6. The liquid is then heated by heating wire 16 in the second processing cylinder 5, causing propane to vaporize and exit from propane outlet 6 for collection. Propylene and the extractant form a liquid mixture. Next, water pump 3 on circulation pipe 11 is activated, allowing the liquid mixture to flow into separation cylinder 7. The liquid mixture is then heated by heating wire 16 in separation cylinder 7, causing propylene to vaporize and flow into adsorption cylinder 8. Then, water pump 3 on extractant inlet 12 is activated, allowing the extractant in separation cylinder 7 to flow back into the second processing cylinder 5 for continued use. Finally, water pump 3 on extractant inlet 12 is turned off. 3. Next, start the vacuum pump 10 to put the adsorption cylinder 8 into a vacuum state, then turn off the vacuum pump 10. Then, the propylene is adsorbed by the activated carbon on the filter plate 13, and the impurities are discharged from the outlet 9. Then, rotate the clamp block 14, and the torsion spring 15 is deformed. Then, remove the filter plate 13 containing the activated carbon and remove the filter plate 13 on the filter cylinder 1 to clean the impurities. Then, perform subsequent treatment on the activated carbon to separate and extract the propylene. This allows for the separate purification of propylene and propane in liquefied petroleum gas while recycling the extractant, reducing purification costs, saving resources, and improving processing efficiency.

[0025] Then, the filter plate 13 is brought into contact with the adsorption cylinder 8 and the filter cylinder 1, and the filter plate 13 is pushed to move for installation. Then, the clamp 14 is released, the torsion spring 15 rotates back to its original position, and the clamp 14 rotates in the opposite direction to reset and contact the filter plate 13 for fixation. This allows the filter plate 13 to be installed for activated carbon adsorption and filtration, facilitating the cleaning of impurities, the replacement of activated carbon, and the loading, unloading and replacement of the filter plate 13. It is easy to use. Then, the above operation is repeated to purify the propylene in the liquefied petroleum gas until purification is complete. Then, the water pump 3, heating wire 16 and cooler 41 are turned off.

[0026] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A propylene purification device for liquefied petroleum gas, characterized by, The filter includes a filter cylinder (1), an oil inlet (2), a water pump (3), a first processing cylinder (4), a cooler (41), a filter plate (13), a drain port (17), an extraction assembly, a pressure swing adsorption assembly, and a fixing assembly. The oil inlet (2) is connected to the front upper part of the filter cylinder (1), the water pump (3) is connected to the right side of the filter cylinder (1), the first processing cylinder (4) is connected to the right side of the filter cylinder (1), the cooler (41) is connected to the upper side of the first processing cylinder (4), the filter plate (13) is slidably clipped to the upper part of the filter cylinder (1), and the drain port (17) is connected to the lower side of the first processing cylinder (4). An extraction assembly for extracting propane is provided on the right side of the cooler (41), and a pressure swing adsorption assembly for adsorbing and extracting propylene is provided on the extraction assembly. Both the filter cylinder (1) and the pressure swing adsorption assembly are provided with fixing assemblies for fixing the filter plate (13).

2. The propylene purification apparatus for liquefied petroleum gas according to claim 1, characterized in that, It also includes a valve (18), and the drain port (17) is equipped with a valve (18).

3. The propylene purification device for liquefied petroleum gas according to claim 1, characterized by, The extraction assembly includes a second processing cylinder (5), a propane outlet (6), a separation cylinder (7), a circulation pipe (11), an extractant inlet (12), and a heating wire (16). The second processing cylinder (5) is connected to the right side of the cooler (41). The propane outlet (6) is connected to the upper right side of the second processing cylinder (5). The circulation pipe (11) is connected to the lower side of the second processing cylinder (5). A water pump (3) is also connected to the circulation pipe (11). The separation cylinder (7) is connected to the rear side of the circulation pipe (11). The extractant inlet (12) is connected to the upper rear side of the second processing cylinder (5). A water pump (3) is also connected to the extractant inlet (12). The water pump (3) on the extractant inlet (12) is connected to the separation cylinder (7). The heating wire (16) is connected to the interior of the first processing cylinder (4), the second processing cylinder (5), and the separation cylinder (7).

4. The propylene purification device for liquefied petroleum gas according to claim 1, characterized by The pressure swing adsorption assembly includes an adsorption cylinder (8), an outlet (9) and a vacuum pump (10). The adsorption cylinder (8) is connected to the rear side of the separation cylinder (7). A filter plate (13) is also slidably attached to the upper part of the adsorption cylinder (8). The outlet (9) is connected to the rear side of the upper part of the adsorption cylinder (8). The vacuum pump (10) is connected to the lower right side of the adsorption cylinder (8).

5. The propylene purification device for liquefied petroleum gas according to claim 1, characterized by, Each filter plate (13) is equipped with a handle.

6. A propylene purification apparatus for liquefied petroleum gas according to claim 1, characterized in that, The fixing components include a clamp (14) and a torsion spring (15). The clamp (14) is rotatably connected to both the filter cylinder (1) and the adsorption cylinder (8). A torsion spring (15) is connected between the rear clamp (14) and the adsorption cylinder (8), and a torsion spring (15) is also connected between the front clamp (14) and the filter cylinder (1).

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