Natural gas recovery equipment based on gas separation technology

Abstract

The utility model relates to the technical field of natural gas recovery, and discloses natural gas recovery equipment based on a gas separation technology, which comprises a support frame, the top of the support frame is fixedly connected with a separation cylinder, the outer wall of the separation cylinder is fixedly connected with a heating ring, and the top of the separation cylinder is fixedly connected with a feeding mechanism. The top of the supporting frame is fixedly connected with a stirring mechanism, the outer wall of the separation barrel is fixedly connected with a purification mechanism, the purification mechanism comprises a discharging pipe, one end of the discharging pipe is fixedly connected to the inner wall of the separation barrel, and the other end of the discharging pipe is detachably connected with a gas-liquid separation pipe; and the bottom of the gas-liquid separation pipe is fixedly connected with a return pipe. According to the utility model, three-phase impurities are efficiently separated, and the purity and the recovery quality of natural gas are improved, so that the use requirements on high-quality natural gas in different scenes such as industrial production and civil use are better met, and the adverse effects of the impurities on the performances such as combustion efficiency are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas recovery technical field especially based on gas separation technology's natural gas recovery equipment. BACKGROUND

[0002] When the natural gas is recovered, the natural gas recovery equipment of gas separation technology is often used, and the natural gas is a naturally occurring gaseous fossil fuel mainly composed of methane, widely distributed in underground rock reservoirs and coal seams, with the characteristics of clean, efficient and high combustion value, and is an important energy resource. The natural gas recovery equipment is used for separating, purifying and collecting natural gas from the gas sources such as the vented natural gas in the oilfield associated gas, coalbed methane, shale gas exploitation process and industrial production of natural gas containing waste gas. Its role is to effectively recover the natural gas resources that would be vented or wasted, not only improves the utilization rate of natural gas, reduces energy waste, but also reduces greenhouse gas emissions, saves costs for enterprises and increases economic benefits, and has important significance in energy utilization and environmental protection.

[0003] The natural gas recovery equipment usually includes an air inlet system, a compression system, a cooling separation system, a purification system and a storage system. The working principle is as follows: the mixed gas first enters the equipment through the air inlet system, the compression system compresses and boosts the gas, the temperature of the gas is raised, then the gas enters the cooling separation system, and the water, heavy hydrocarbon and other impurities in the gas are condensed into liquid state and separated out by cooling; then the gas enters the purification system, and the impurities such as carbon dioxide and hydrogen sulfide are further removed by adsorption, absorption and other technologies, and the purified natural gas is obtained; finally, the purified natural gas is transported to the storage system for storage, and the whole process is realized through the coordinated operation of the structures, so as to realize the efficient recovery of natural gas from the mixed gas.

[0004] In the prior art, due to the complexity of the solid, liquid and gas components in the natural gas, the size and properties of the solid particles are different, and there are many liquid components, and different phase materials require different physical and chemical conditions for separation, so that some equipment is difficult to separate the solid, liquid and gas three phases of the natural gas, thereby reducing the efficiency and quality of the natural gas recovery, and due to the loss in the recovery process, the amount of the finally recovered natural gas is reduced, and therefore the natural gas recovery equipment based on the gas separation technology is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a natural gas recovery equipment based on gas separation technology, which aims at improving the problem that some equipment in the prior art is difficult to separate the solid, liquid and gas three phases of the natural gas.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The natural gas recovery equipment based on gas separation technology comprises a support frame, a separation cylinder fixedly connected to the top of the support frame, a heating ring fixedly connected to the outer wall of the separation cylinder, a feeding mechanism fixedly connected to the top of the separation cylinder, a stirring mechanism fixedly connected to the top of the support frame, and a purification mechanism fixedly connected to the outer wall of the separation cylinder;

[0008] The purification mechanism comprises a discharge pipe, one end of the discharge pipe is fixedly connected to the inner wall of the separation cylinder, the other end of the discharge pipe is detachably connected with a gas-liquid separation pipe, the bottom of the gas-liquid separation pipe is fixedly connected with a reflux pipe, the other end of the reflux pipe is fixedly connected to the inside of the separation cylinder, the other end of the gas-liquid separation pipe is fixedly connected with a condensation separation pipe, the top of the condensation separation pipe is fixedly connected with a natural gas recovery pipe, the other end of the natural gas recovery pipe is fixedly connected with a natural gas recovery cylinder, the bottom of the condensation separation pipe is fixedly connected with a water removal assembly, and the outer wall of the gas-liquid separation pipe is threadedly connected with a sealing assembly.

[0009] As a further description of the above technical solutions:

[0010] The sealing assembly comprises two sealing rings, the inner walls of the two sealing rings are respectively threadedly connected to the outer walls of the two ends of the gas-liquid separation pipe, the outer wall of the sealing ring is fixedly connected with a sealing ring, the outer wall of the discharge pipe is fixedly connected with a butt ring, and the outer wall of the sealing ring is detachably connected to the inner wall of the butt ring.

[0011] As a further description of the above technical solutions:

[0012] The water removal assembly comprises a water vapor shunt pipe, the top of the water vapor shunt pipe is fixedly connected to the bottom of the condensation separation pipe, the bottom of the water vapor shunt pipe is fixedly connected with a condensate water cylinder, the inside of the condensation separation pipe is fixedly connected with a temperature table, and the outer wall of the natural gas recovery pipe is fixedly connected with a cooling jacket.

[0013] As a further description of the above technical solutions:

[0014] The inner wall of the discharge pipe is fixedly connected with a filter plate, and the inner wall of the gas-liquid separation pipe is fixedly connected with a gas-liquid separation plate.

[0015] As a further description of the above technical solutions:

[0016] The feeding mechanism comprises a feeding valve, an outer wall of the feeding valve is fixedly connected to the top of the separation cylinder, an inner wall of the feeding valve is slidably connected with a sliding ring, an inner wall of the sliding ring is fixedly connected with a connecting block, the bottom of the connecting block is fixedly connected with a transmission column, the bottom of the transmission column is fixedly connected with a piston, the outer side of the piston is sleeved with a rubber ring, the bottom of the sliding ring is fixedly connected with a spring, the other end of the spring is fixedly connected to the inner wall of the feeding valve;

[0017] As a further description of the above technical solution:

[0018] The stirring mechanism comprises a motor, the bottom of the motor is fixedly connected to the top of the support frame, the output end of the motor is fixedly connected with a transmission rod, and the outer wall of the transmission rod is fixedly connected with a plurality of stirring paddles;

[0019] As a further description of the above technical solution:

[0020] The outer wall of the piston is in contact with the inner wall of the feeding valve, and the outer diameter of the rubber ring is equal to the inner diameter of the bottom opening of the feeding valve;

[0021] As a further description of the above technical solution:

[0022] The end head outer wall of the stirring paddle is in contact with the inner wall of the separation cylinder, and the outer wall of the transmission rod is rotatably connected to the bottom of the separation cylinder.

[0023] The utility model has the advantages of:

[0024] 1、 in the utility model, through the operation of the natural gas recovery cylinder exhaust pump, the gas preliminarily separated by the separation cylinder is transported to the gas-liquid separation pipe by the discharge pipe, and the solid impurities are filtered by the filter plate, the liquid water drops are separated by the gas-liquid separation plate and the gas-liquid separation membrane in the gas-liquid separation pipe, the water drops are returned to the separation cylinder for secondary volatile separation through the reflux pipe, and the impurity gas is separated by the condensing separation pipe using the temperature difference, so that the condensed water is transported to the condensing water cylinder through the water vapor shunt pipe, and the trace impurities are condensed into liquid beads by the cooling jacket and separated, finally the natural gas purified multiple times enters the recovery cylinder, realizes the efficient separation of three-phase impurities, improves the natural gas purity and recovery quality, and is more in line with the use requirements of high-quality natural gas in different scenarios such as industrial production and civil use, reduces the adverse effects of impurities on combustion efficiency and other performances.

[0025] 2. The utility model discloses, through the pressure of natural gas feed makes piston downward movement thereby makes piston and feed valve separate, piston downward movement transmission makes the sliding ring down shift compression spring energy storage through connecting block, after feed end, spring rebound pushes the sliding ring up shift, drives piston up shift and blocks feed valve bottom, rubber ring ensures the sealing, thereby realized to feed valve feed after automatic sealing processing, thereby effectively prevent natural gas leakage, avoided the resource waste that causes natural gas leakage, ensured the recovery rate of natural gas. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the three-dimensional schematic view of natural gas recovery equipment based on gas separation technology that the utility model provides;

[0027] Figure 2 It is the structure schematic view of separation cylinder of natural gas recovery equipment based on gas separation technology that the utility model provides;

[0028] Figure 3 It is the structure schematic view of feed valve of natural gas recovery equipment based on gas separation technology that the utility model provides;

[0029] Figure 4 It is Figure 2 The enlarged view of A in the middle.

[0030] Legend:

[0031] 1, support frame;2, separation cylinder;3, heating ring;4, feed valve;5, sliding ring;6, connecting block;7, transmission column;8, piston;9, rubber ring;10, spring;11, motor;12, transmission rod;13, stirring paddle;14, discharge pipe;15, filter plate;16, gas-liquid separation pipe;17, reflux pipe;18, condensation separation pipe;19, temperature table;20, natural gas recovery pipe;21, cooling jacket;22, water vapor shunt pipe;23, condensate cylinder;24, natural gas recovery cylinder;25, gas-liquid separation plate;26, sealing ring;27, butt joint ring;28, sealing ring. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0033] Refer to Figure 1 , Figure 2 , Figure 4The utility model provides an embodiment: natural gas recovery equipment based on gas separation technology, including support frame 1, support frame 1 is used to provide stable installation support point for subsequent recovery equipment, and carries the action force of entire recovery equipment operation time, thereby make the whole recovery process keep stable. The top fixed connection of support frame 1 has separation cylinder, separation cylinder 2 makes natural gas carry out effective preliminary separation in it, and the preliminary separation of part impurities and the component not needing in mixed gas is carried out, thereby improves the efficiency and purity of subsequent separation step. The outer wall fixed connection of separation cylinder 2 has heating ring 3, and the effect of heating ring 3 is to heat the gas in separation cylinder 2, thereby makes the substance of not easy volatility be separated out and remain in separation cylinder 2, and the separated gas and steam are transported to subsequent separation structure and carry out secondary separation. The top fixed connection of separation cylinder 2 has feeding mechanism, and the top fixed connection of support frame 1 has stirring mechanism, and the outer wall fixed connection of separation cylinder 2 has purification mechanism,

[0034] Purification mechanism includes discharge pipe 14, and one end of discharge pipe 14 is fixedly connected in the inner wall of separation cylinder 2, and discharge pipe 14 is used to guide the gas after preliminary separation to enter subsequent purification step. The inner wall fixed connection of discharge pipe 14 has filter plate 15, and filter plate 15 can intercept the small solid particle impurities still remaining in the gas after preliminary separation. The other end detachably connected of discharge pipe 14 has gas-liquid separation tube 16, and gas-liquid separation tube 16 is used to separate the liquid small water drop contained in gas, and the inner wall fixed connection of gas-liquid separation tube 16 has gas-liquid separation plate 25, and gas-liquid separation plate 25 contains gas-liquid separation membrane, thereby utilizes the difference of the adhesion, surface tension and gravity of gas and liquid on its surface physical characteristics, and the liquid component entrained in gas is efficiently separated, and since the opening of gas-liquid separation plate 25 is horn-shaped, thereby makes the separated liquid small water drop enter subsequent reflux structure through the spherical inner wall of gas-liquid separation tube 16. The bottom fixed connection of gas-liquid separation tube 16 has reflux tube 17, and the other end of reflux tube 17 is fixedly connected in the inside of separation cylinder 2, and reflux tube 17 sends the liquid impurities collected in the bottom of gas-liquid separation tube 16 back to separation cylinder 2, thereby carries out volatile separation again, and thereby further extracts the natural gas component contained in liquid impurities.

[0035] The other end of the gas-liquid separation pipe 16 is fixedly connected with a condensation separation pipe 18, which further separates the gas by using temperature difference. The top of the condensation separation pipe 18 is fixedly connected with a natural gas recovery pipe 20, the gas inlet end of which is in a vertical upward state, so that the condensed liquid is automatically transported downward due to gravity. The other end of the natural gas recovery pipe 20 is fixedly connected with a natural gas recovery cylinder 24, which is provided with a gas suction pump, so that the whole gas suction process is continuous and stable. The bottom of the condensation separation pipe 18 is fixedly connected with a water removal assembly, which is used to remove the residual water in the natural gas. The outer wall of the gas-liquid separation pipe 16 is threadedly connected with a sealing assembly, which is used to keep the gas-liquid separation pipe 16 sealed during installation and prevent gas leakage.

[0036] The sealing assembly includes two sealing rings 26, the inner walls of which are respectively threadedly connected to the outer walls of the two ends of the gas-liquid separation pipe 16, so that the sealing rings 26 can move on the gas-liquid separation pipe 16 through threaded connection, and then be moved to the connection positions of the two ends of the gas-liquid separation pipe 16 for abutting sealing. This prevents gas leakage at the connection positions of the gas-liquid separation pipe 16 and ensures that the whole gas separation and purification process is carried out in a closed environment. The outer wall of the sealing ring 26 is fixedly connected with a sealing ring 28, which is used to further enhance the sealing performance of the abutting position of the gas-liquid separation pipe 16. The outer wall of the discharge pipe 14 is fixedly connected with an abutting ring 27, which forms an abutting mechanism with the sealing ring 26 to ensure the stability of the installation of the gas-liquid separation pipe 16. The outer wall of the sealing ring 28 is detachably connected to the inner wall of the abutting ring 27, so that by rotating the sealing ring 26, the sealing ring 26 is moved towards the abutting ring 27, so that the sealing ring 28 is pressed while the abutting installation of the gas-liquid separation pipe 16 is realized, thereby filling and sealing the gap at the abutting position.

[0037] The water removal assembly includes a water vapor diversion pipe 22, the top of which is fixedly connected to the bottom of the condensation separation pipe 18. The water vapor diversion pipe 22 can guide the liquid water condensed in the condensation separation pipe 18 out, thereby improving the purity of the natural gas and enhancing the purification and separation effect of the natural gas. The bottom of the water vapor diversion pipe 22 is fixedly connected with a condensate water cylinder 23, which is used to collect the liquid water discharged from the water vapor diversion pipe 22. The inside of the condensation separation pipe 18 is fixedly connected with a temperature table 19, which is used to monitor the temperature in the condensation separation pipe 18 in real time. The outer wall of the natural gas recovery pipe 20 is fixedly connected with a cooling sleeve 21, which cools the natural gas in the natural gas recovery pipe 20, reduces the pressure fluctuation and composition change of the natural gas due to temperature change during storage, and makes the trace impurities in the natural gas form liquid beads through recooling and condensation for separation and collection.

[0038] Referring toFigures 1 to 3 The feeding mechanism includes a feeding valve 4, the outer wall of which is fixedly connected to the top of the separation cylinder 2, and the feeding valve 4 is used to control the feeding operation of the entire natural gas recovery device and automatically seal after the feeding is completed, so as to ensure that the natural gas does not leak. The inner wall of the feeding valve 4 is slidably connected with a sliding ring 5, which can slide up and down inside the feeding valve 4, so as to control the automatic sealing process of the subsequent structure after feeding. The inner wall of the sliding ring 5 is fixedly connected with a connecting block 6, which is used to provide a connecting support point for the subsequent structure, and the hole design of the connecting block 6 does not affect the feeding operation. The bottom of the connecting block 6 is fixedly connected with a transmission column 7, which is used to transmit the stress of the subsequent structure to the sliding ring 5 through the connecting block 6, so that the sliding ring 5 moves. The bottom of the transmission column 7 is fixedly connected with a piston 8, the outer wall of which is in contact with the inner wall of the feeding valve 4. The piston 8 is used to block the feeding valve 4 when not feeding, and the feeding valve 4 is opened and closed by blocking and separating the piston 8 and the bottom of the feeding valve 4. The outer side of the piston 8 is sleeved with a rubber ring 9, the outer diameter of which is equal to the inner diameter of the bottom opening of the feeding valve 4. The rubber ring 9 can always maintain close contact with the inner wall of the feeding valve 4 by relying on its elasticity, ensuring the reliability of the sealing. The bottom of the sliding ring 5 is fixedly connected with a spring 10, the other end of which is fixedly connected to the inner wall of the feeding valve 4. The spring 10 plays a role of resetting and auxiliary sealing in the feeding mechanism. During the feeding process, the pressure of the natural gas pushes the piston 8 to move downward, so as to drive the sliding ring 5 to move downward through the transmission effect of the connecting block 6, so that the spring 10 is compressed to store energy. When the feeding is completed, the spring 10 releases the stored energy to push the sliding ring 5 to move upward, and then drives the piston 8 to seal the feeding port.

[0039] The stirring mechanism includes a motor 11, the bottom of which is fixedly connected to the top of the support frame 1, and the motor 11 provides a stable power basis for the entire stirring mechanism. The output end of the motor 11 is fixedly connected with a transmission rod 12, the outer wall of which is rotatably connected to the bottom of the separation cylinder 2, and the transmission rod 12 is used to transmit the power of the motor 11 to the subsequent stirring structure. The outer wall of the transmission rod 12 is fixedly connected with a plurality of stirring paddles 13, the end outer wall of which is in contact with the inner wall of the separation cylinder 2. The stirring paddles 13 rotate under the drive of the transmission rod 12, so as to ensure that the natural gas in the separation cylinder 2 is stirred in all directions, so as to accelerate the heat exchange and mass transfer process between gas molecules, thereby improving the speed and accuracy of gas separation.

[0040] Working principle: when feeding, the pressure of natural gas acts on the piston 8, driving the piston 8 to move downward, the movement of the piston 8 drives the connecting block 6 to move downward through the transmission of the connecting block 6, and then compresses the spring 10 to store energy; when the feeding is completed, the spring 10 releases the stored energy, driving the sliding ring 5 to move upward, the upward movement of the sliding ring 5 drives the piston 8 to move upward through the connecting block 6, the upward movement of the piston 8 realizes the sealing of the bottom of the feeding valve 4, and the rubber ring 9 on the outside of the piston 8 always maintains close contact with the inner wall of the feeding valve 4 by relying on its elasticity, ensuring the reliability of the seal, so as to complete the automatic sealing treatment of the feeding valve 4 after feeding, avoiding natural gas leakage, and providing stable starting conditions for the subsequent natural gas separation process.

[0041] After feeding, open the heating ring 3 and the motor 11, the motor 11 operates to drive the stirring paddle 13 to rotate through the transmission of the transmission rod 12, so that the gas and solid-liquid mixture in the whole separation cylinder 2 are preliminarily separated due to the difference in specific gravity, and part of the impurities are preliminarily removed, improving the subsequent separation efficiency. And through the heating ring 3, the gas is heated, so that the substances not easy to volatilize remain in the cylinder, and the gas and steam enter the subsequent purification step.

[0042] Then open the gas extraction pump in the natural gas recovery cylinder 24 to extract the gas, so that the gas preliminarily separated by the separation cylinder 2 is transported through the discharge pipe 14, and the filter plate 15 in the discharge pipe 14 intercepts the residual small solid particle impurities, realizing the preliminary separation of solid impurities. Then, the gas enters the gas-liquid separation pipe 16, and the gas-liquid separation plate 25 in the pipe separates the liquid droplets by utilizing the difference in physical properties of gas and liquid, and the liquid droplets automatically enter the reflux pipe 17 through the gas-liquid separation pipe 16, and the reflux pipe 17 sends the liquid impurities back to the separation cylinder 2 for volatile separation again, further extracting the natural gas components, and the twice-purified gas enters the condensation separation pipe 18, and the impurity gas is further separated by utilizing the temperature difference, and the condensed liquid is automatically transported downward through the water vapor diversion pipe 22 due to the vertical upward design of the gas inlet end of the natural gas recovery pipe 20 under the action of gravity, and the condensed liquid water is concentrated and guided to the condensate cylinder 23. Then, the natural gas is cooled again through the cooling jacket 21, so that the trace impurities are condensed into liquid droplets again, and the natural gas is further purified, so that the natural gas after multiple purification enters the natural gas recovery cylinder 24. The three-phase efficient separation of solid, liquid and gas impurities is realized, and the purity and recovery quality of the natural gas are improved.

[0043] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A natural gas recovery plant based on gas separation technology, comprising a support frame (1), characterized in that: The top of the support frame (1) is fixedly connected with a separation cylinder (2), the outer wall of the separation cylinder (2) is fixedly connected with a heating ring (3), the top of the separation cylinder (2) is fixedly connected with a feeding mechanism, the top of the support frame (1) is fixedly connected with a stirring mechanism, and the outer wall of the separation cylinder (2) is fixedly connected with a purification mechanism. The purification mechanism comprises a discharge pipe (14), one end of the discharge pipe (14) is fixedly connected to the inner wall of the separation cylinder (2), the other end of the discharge pipe (14) is detachably connected with a gas-liquid separation pipe (16), the bottom of the gas-liquid separation pipe (16) is fixedly connected with a reflux pipe (17), the other end of the reflux pipe (17) is fixedly connected to the inside of the separation cylinder (2), the other end of the gas-liquid separation pipe (16) is fixedly connected with a condensation separation pipe (18), the top of the condensation separation pipe (18) is fixedly connected with a natural gas recovery pipe (20), the other end of the natural gas recovery pipe (20) is fixedly connected with a natural gas recovery cylinder (24), the bottom of the condensation separation pipe (18) is fixedly connected with a water removal assembly, and the outer wall of the gas-liquid separation pipe (16) is threadedly connected with a sealing assembly.

2. A natural gas recovery plant based on gas separation technology according to claim 1, characterized in that: The sealing assembly comprises two sealing rings (26), the inner walls of the two sealing rings (26) are respectively threadedly connected to the outer walls of the two ends of the gas-liquid separation pipe (16), the outer wall of the sealing ring (26) is fixedly connected with a sealing ring (28), the outer wall of the discharge pipe (14) is fixedly connected with a butt ring (27), and the outer wall of the sealing ring (28) is detachably connected to the inner wall of the butt ring (27).

3. The natural gas recovery apparatus based on gas separation technology of claim 1, wherein: The water removal assembly comprises a water vapor shunt pipe (22), the top of the water vapor shunt pipe (22) is fixedly connected to the bottom of the condensation separation pipe (18), the bottom of the water vapor shunt pipe (22) is fixedly connected with a condensed water cylinder (23), the inside of the condensation separation pipe (18) is fixedly connected with a temperature table (19), and the outer wall of the natural gas recovery pipe (20) is fixedly connected with a cooling sleeve (21).

4. The natural gas recovery apparatus based on gas separation technology of claim 1, wherein: The inner wall of the discharge pipe (14) is fixedly connected with a filter plate (15), and the inner wall of the gas-liquid separation pipe (16) is fixedly connected with a gas-liquid separation plate (25).

5. The natural gas recovery apparatus based on gas separation technology of claim 1, wherein: The feeding mechanism comprises a feeding valve (4), the outer wall of the feeding valve (4) is fixedly connected to the top of the separation cylinder (2), the inner wall of the feeding valve (4) is slidingly connected with a sliding ring (5), the inner wall of the sliding ring (5) is fixedly connected with a connecting block (6), the bottom of the connecting block (6) is fixedly connected with a transmission column (7), the bottom of the transmission column (7) is fixedly connected with a piston (8), the outer side of the piston (8) is sleeved with a rubber ring (9), the bottom of the sliding ring (5) is fixedly connected with a spring (10), and the other end of the spring (10) is fixedly connected to the inner wall of the feeding valve (4).

6. The natural gas recovery apparatus based on gas separation technology of claim 1, wherein: The stirring mechanism comprises a motor (11), the bottom of the motor (11) is fixedly connected to the top of the support frame (1), the output end of the motor (11) is fixedly connected with a transmission rod (12), and the outer wall of the transmission rod (12) is fixedly connected with a plurality of stirring paddles (13).

7. The natural gas recovery apparatus based on gas separation technology of claim 5, wherein: The outer wall of the piston (8) is in contact with the inner wall of the feeding valve (4), and the outer diameter of the rubber ring (9) is equal to the inner diameter of the bottom opening of the feeding valve (4).

8. The natural gas recovery apparatus based on gas separation technology of claim 6, wherein: The end outer wall of the stirring paddle (13) is in contact with the inner wall of the separation cylinder (2), and the outer wall of the transmission rod (12) is rotatably connected to the bottom of the separation cylinder (2).

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