Rectifying tower for coal bed gas liquefaction

Abstract

The utility model relates to the technical field of rectifying towers, and discloses a rectifying tower for coal bed gas liquefaction, which comprises a rectifying tower body, a liquid outlet pipe is communicated with the bottom wall surface of the rectifying tower body, an adjusting valve is arranged on the outer wall of the liquid outlet pipe, a gas inlet pipe is communicated with the outer side wall surface of the rectifying tower body, and a fixing frame is arranged in the gas inlet pipe. A piston sealing piece is fixedly connected to the outer wall of the fixing frame, a mounting frame is arranged in the fixing frame, a drying layer, a zeolite layer and an activated carbon layer are sequentially and fixedly connected to the inner wall of the mounting frame, two adjusting grooves are formed in the wall face of the side, away from the rectifying tower body, of the mounting frame, and two push rods are slidably arranged in the two adjusting grooves respectively. The two push rods in the two adjusting grooves are pushed to be close to each other and extrude the telescopic rods and the adjusting springs, space is provided for the insertion rods, the insertion rods are separated from the insertion holes, and therefore the installation frame, the drying layer, the zeolite layer and the activated carbon layer are taken down from the fixing frame to be replaced.

Description

Technical Field

[0001] This utility model relates to the field of distillation tower technology, and in particular to a distillation tower for coalbed methane liquefaction. Background Technology

[0002] A coalbed methane reservoir is an underground area where coal or natural gas is stored, typically found within the geological structure of coal mines or natural gas fields. These reservoirs are usually composed of porous rock or coal seams, possessing the ability to store and transport gases. Coalbed methane reservoirs are of great importance in energy extraction, especially in the development of natural gas and coalbed methane. Coalbed methane is primarily composed of methane, which can be extracted and transported through commercial mining. However, to improve transportation and utilization efficiency, coalbed methane usually requires liquefaction. In this liquefaction process, distillation columns play a crucial role. These columns separate methane from other gases (such as ethane, propane, and carbon dioxide) using fractionation technology, thereby obtaining high-purity methane liquefied products. This process is essential for the efficient utilization of coalbed methane and energy transportation.

[0003] In coalbed methane liquefaction technology, existing distillation towers used for coalbed methane liquefaction can filter coalbed methane, but these filter layers cannot be easily disassembled and replaced. Over time, they gradually become saturated and contaminated, which leads to a reduction in filtration efficiency and an inability to effectively remove impurities from the gas, thereby affecting the efficiency of the liquefaction process and the purity of the final product.

[0004] Therefore, we propose a distillation column for coalbed methane liquefaction. Utility Model Content

[0005] The present invention aims to solve the technical problems existing in the prior art and provide a distillation tower for coalbed methane liquefaction.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a distillation tower for coalbed methane liquefaction, comprising a distillation tower body, a liquid outlet pipe connected to the bottom wall of the distillation tower body, a regulating valve on the outer wall of the liquid outlet pipe, an air inlet pipe connected to the outer wall of the distillation tower body, a fixing frame inside the air inlet pipe, a piston sealing plate fixedly connected to the outer wall of the fixing frame, an installation frame inside the fixing frame, a drying layer, a zeolite layer and an activated carbon layer fixedly connected to the inner wall of the installation frame in sequence, two adjusting grooves opened on the side wall of the installation frame away from the distillation tower body, two push rods slidably arranged in the two adjusting grooves respectively, and disassembly and assembly components for disassembling and assembling the installation frame respectively on the two push rods, the disassembly and assembly components including a telescopic rod and two insert rods.

[0007] As a preferred technical solution of this utility model, the upper and lower inner walls of the air intake pipe are symmetrically provided with four movable sliding grooves, and a slider is slidably arranged in each of the four movable sliding grooves. The four sliders are fixedly connected to the upper and lower outer walls of the piston sealing plate, and the outer wall of the piston sealing plate is tightly fitted with the inner wall of the air intake pipe.

[0008] As a preferred technical solution of this utility model, the four sliders are divided into front and rear groups. The right end walls of the upper and lower sliders in the two groups are respectively fixedly connected to a fixing frame. The two fixing frames are arc-shaped structures, and the side walls of the two fixing frames away from the piston sealing plate are respectively fixedly connected to a pull rod.

[0009] As a preferred embodiment of this utility model, the two ends of the telescopic rod are respectively fixedly connected to the wall surface of the two push rods that are close to each other, and an adjusting spring is sleeved on the outer wall of the telescopic rod.

[0010] As a preferred technical solution of this utility model, the ends of the two insert rods that are close to each other are respectively fixedly connected to the side wall of the two push rods that are far apart from each other, and the ends of the two insert rods that are far away from the push rods respectively pass through the mounting frame and are slidably connected to the mounting frame.

[0011] As a preferred technical solution of this utility model, the upper and lower inner walls of the fixed frame are respectively symmetrically provided with insertion holes adapted to the insertion rods, and the end of the insertion rod away from the push rod is slidably inserted into the corresponding insertion hole.

[0012] This invention provides a distillation column for coalbed methane liquefaction. It has the following beneficial effects:

[0013] 1. This distillation tower for coalbed methane liquefaction, during operation, allows gas to be discharged into the tower body through an inlet pipe and sequentially filtered through a drying layer, a zeolite layer, and an activated carbon layer to remove impurities, ensuring smooth liquefaction and improving the purity of the final product. Because the piston seal is tightly fitted to the inner wall of the inlet pipe, it remains stationary under friction. When the drying layer, zeolite layer, and activated carbon layer become contaminated and need replacement, first, two pull rods are pulled. These rods, through a fixed frame and a slider, move the piston seal, thereby pulling the fixed frame and mounting frame together. When they reach the inlet of the inlet pipe, two push rods in the two adjusting slots are pushed, causing them to approach each other and press against the telescopic rod and adjusting spring, thus providing space for the insertion rod to disengage from the insertion hole. This allows the mounting frame, drying layer, zeolite layer, and activated carbon layer to be easily removed from the fixed frame for replacement, maintaining efficient equipment operation and ensuring smooth liquefaction, greatly improving the convenience and practicality of the device. Attached Figure Description

[0014] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented, and therefore have no substantial technical significance.

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the intake pipe of a utility model.

[0017] Figure 3 A schematic diagram of the utility model's fixing frame, piston sealing plate, and mounting frame structure;

[0018] Figure 4 This is a schematic diagram of the installation frame structure for a utility model.

[0019] Legend:

[0020] 10. Distillation column body; 11. Liquid outlet pipe; 12. Gas inlet pipe; 13. Fixing frame; 14. Piston seal; 15. Moving chute; 16. Sliding block; 17. Fixing bracket; 18. Tie rod; 19. Mounting frame; 20. Drying layer; 21. Zeolite layer; 22. Activated carbon layer; 23. Adjusting tank; 24. Push rod; 25. Telescopic rod; 26. Adjusting spring; 27. Insert rod. Detailed Implementation

[0021] A distillation column for coalbed methane liquefaction, such as Figure 1-4As shown, the distillation column includes a main body 10. A liquid outlet pipe 11 is connected to the bottom wall of the main body 10. A regulating valve is provided on the outer wall of the liquid outlet pipe 11. An air inlet pipe 12 is connected to the outer wall of the main body 10. A fixing frame 13 is installed inside the air inlet pipe 12. A piston sealing plate 14 is fixedly connected to the outer wall of the fixing frame 13. An installation frame 19 is installed inside the fixing frame 13. A drying layer 20, a zeolite layer 21, and an activated carbon layer 22 are sequentially fixedly connected to the inner wall of the installation frame 19. Two adjusting grooves 23 are provided on the side wall of the mounting frame 19 away from the distillation column body 10. Two push rods 24 are slidably installed in the two adjusting grooves 23 respectively. The two push rods 24 are respectively provided with disassembly and assembly components for disassembling and assembling the mounting frame 19. The disassembly and assembly components include telescopic rods 25 and two insert rods 27. Four movable slide grooves 15 are symmetrically provided on the inner walls of the upper and lower sides of the air inlet pipe 12. Sliding sliders 16 are slidably installed in the four movable slide grooves 15 respectively. The sliders 16 are fixedly connected to the upper and lower outer walls of the piston seal 14, and the outer wall of the piston seal 14 is tightly fitted to the inner wall of the intake pipe 12. The four sliders 16 are divided into two groups, front and back. The right end walls of the upper and lower sliders 16 in the two groups are fixedly connected to the fixing brackets 17. The two fixing brackets 17 are arc-shaped, and the side walls of the two fixing brackets 17 away from the piston seal 14 are fixedly connected to the pull rods 18. The two ends of the telescopic rod 25 are fixedly connected to the side walls of the two push rods 24 that are close to each other, and the outer wall of the telescopic rod 25 is fitted with an adjusting spring 26. The side walls of the two insertion rods 27 that are close to each other are fixedly connected to the side walls of the two push rods 24 that are far from each other. The side walls of the two insertion rods 27 that are far from the push rods 24 pass through the mounting frame 19 and are slidably connected to the mounting frame 19. The upper and lower inner walls of the fixing frame 13 are symmetrically provided with insertion holes that are compatible with the insertion rods 27, and the side walls of the insertion rods 27 that are far from the push rods 24 are slidably inserted into the corresponding insertion holes.

[0022] The working principle of this utility model is as follows: During use, the gas is discharged into the distillation column body 10 through the inlet pipe 12, and is filtered sequentially through the drying layer 20, the zeolite layer 21, and the activated carbon layer 22 to remove impurities from the gas, ensuring the smooth progress of the liquefaction process and improving the purity of the final product. Because the piston sealing plate 14 is tightly fitted to the inner wall of the inlet pipe 12, it remains stationary under the action of friction. When the drying layer 20, the zeolite layer 21, and the activated carbon layer 22 become contaminated and need to be replaced, the two pull rods 18 are pulled first. The pull rods 18 drive the piston through the fixing bracket 17 and the slider 16. The sealing plate 14 moves, thereby pulling the fixed frame 13 and the mounting frame 19 together. When it moves to the air inlet of the air inlet pipe 12, it pushes the two push rods 24 in the two adjustment slots 23, so that the push rods 24 are close to each other and squeeze the telescopic rod 25 and the adjusting spring 26, thereby providing space for the insertion rod 27 and allowing the insertion rod 27 to disengage from the insertion hole. In this way, the mounting frame 19, the drying layer 20, the zeolite layer 21 and the activated carbon layer 22 can be easily removed from the fixed frame 13 for replacement, thereby maintaining the efficient operation of the equipment and ensuring the smooth progress of the liquefaction process, greatly improving the convenience and practicality of the device.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A distillation column for coalbed methane liquefaction, comprising a distillation column body (10), a liquid outlet pipe (11) connected to the bottom wall of the distillation column body (10), a regulating valve provided on the outer wall of the liquid outlet pipe (11), and an air inlet pipe (12) connected to the outer wall of the distillation column body (10), characterized in that: The air inlet pipe (12) is provided with a fixed frame (13) inside. A piston sealing plate (14) is fixedly connected to the outer wall of the fixed frame (13). An installation frame (19) is provided inside the fixed frame (13). A drying layer (20), a zeolite layer (21) and an activated carbon layer (22) are fixedly connected to the inner wall of the installation frame (19) in sequence. Two adjustment grooves (23) are opened on the side wall of the installation frame (19) away from the distillation column body (10). Two push rods (24) are slidably arranged in the two adjustment grooves (23). The two push rods (24) are respectively provided with disassembly and assembly components for disassembling and assembling the installation frame (19). The disassembly and assembly components include a telescopic rod (25) and two insert rods (27).

2. A distillation column for coalbed methane liquefaction according to claim 1, characterized in that: The upper and lower inner walls of the air intake pipe (12) are symmetrically provided with movable grooves (15). There are four movable grooves (15), and sliders (16) are slidably arranged in the four movable grooves (15). The four sliders (16) are fixedly connected to the upper and lower outer walls of the piston sealing plate (14), and the outer wall of the piston sealing plate (14) is tightly fitted with the inner wall of the air intake pipe (12).

3. A distillation column for coalbed methane liquefaction according to claim 2, characterized in that: The four sliders (16) are divided into two groups, front and back. The right end walls of the upper and lower sliders (16) in the two groups are respectively fixedly connected to a fixing frame (17). The two fixing frames (17) are arc-shaped structures, and the side walls of the two fixing frames (17) away from the piston sealing plate (14) are respectively fixedly connected to a pull rod (18).

4. A distillation column for coalbed methane liquefaction according to claim 1, characterized in that: The two ends of the telescopic rod (25) are respectively fixedly connected to the wall of the two push rods (24) that are close to each other, and the outer wall of the telescopic rod (25) is fitted with an adjusting spring (26).

5. A distillation column for coalbed methane liquefaction according to claim 1, characterized in that: The two insert rods (27) are fixedly connected to the side wall of the two push rods (24) on the side away from each other at the ends of the two insert rods (27) and the ends of the two insert rods (27) away from the push rods (24) respectively pass through the mounting frame (19) and are slidably connected to the mounting frame (19).

6. A distillation column for coalbed methane liquefaction according to claim 1, characterized in that: The upper and lower inner walls of the fixed frame (13) are symmetrically provided with insertion holes that are compatible with the insertion rod (27), and the end of the insertion rod (27) away from the push rod (24) is slidably inserted into the corresponding insertion hole.

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