Oil gas adsorption and negative pressure desorption recovery device

Abstract

The utility model discloses an oil gas adsorption negative pressure desorption recovery device which comprises an adsorption tank body, one side of the adsorption tank body is connected with negative pressure equipment, a filter tube matrix is arranged in the adsorption tank body, the filter tube matrix comprises a plurality of filter tubes made of activated carbon fibers, the adsorption tank body is provided with a gas inlet and a gas outlet, and the gas inlet is communicated with the gas outlet. The filter tube matrix is arranged between the air inlet and the air outlet, and the air outlet is connected with a recovery pipeline. Gas introduced into the oil gas adsorption and negative pressure desorption recovery device is uniformly distributed, and the utilization rate of an adsorption material is high; the filter tubes in the filter tube matrix are thin in wall and small in resistance, the negative pressure desorption effect can be improved, in addition, through the design of the gas distributor and the gas distribution device, the distribution uniformity of gas in the adsorption and desorption process is guaranteed, and the whole oil gas adsorption and negative pressure desorption recovery process is effectively optimized.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas recovery technology, specifically to an oil and gas adsorption negative pressure desorption recovery device. Background Technology

[0002] With economic development, the consumption of petroleum and its products is increasing daily. During the storage, transportation, and handling of petroleum, a large amount of oil and gas evaporates into the atmosphere. This not only wastes energy but also harms the environment and human health. Therefore, oil and gas recovery technology has become crucial.

[0003] Existing oil and gas adsorption devices have some shortcomings in terms of adsorption efficiency and desorption effect. For example, the traditional method of packing block or granular adsorbent materials may lead to uneven gas distribution, and some adsorbent materials may not be fully utilized, reducing the utilization rate of the adsorbent materials. At the same time, during the desorption process, due to the structural problems of the adsorbent materials, incomplete desorption may occur, affecting the oil and gas recovery efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an oil and gas adsorption negative pressure desorption and recovery device to solve one or more of the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model discloses an oil and gas adsorption negative pressure desorption and recovery device, including an adsorption tank with a negative pressure device connected to one side. A filter tube matrix is ​​installed inside the adsorption tank, comprising multiple filter tubes made of activated carbon fibers. The adsorption tank has an inlet and an outlet, and the filter tube matrix is ​​positioned between the inlet and outlet. Compared to traditional block or granular absorbent materials, the small tubes made of activated carbon fibers are more conducive to forming a more regular and uniform gas channel between the filter tubes. When oil and gas enter the adsorption tank, they can travel more evenly between the filter tubes, making full contact with each activated carbon fiber filter tube. This avoids the gas "short-circuiting" phenomenon caused by improper stacking of the adsorption material, i.e., excessive gas flow in some areas while gas cannot reach other areas. This allows the activated carbon fibers to maximize their adsorption performance, greatly improving the utilization rate of the adsorption material.

[0006] In some implementations...

[0007] The filter tube has a wall thickness of 10mm-50mm. This thinner wall design significantly reduces the frictional resistance between the gas and the tube wall when the gas passes through the filter tube. On the one hand, this facilitates the rapid diffusion of oil and gas into the interior of the filter tube during adsorption, allowing for full contact and adsorption with the activated carbon fibers, thus improving adsorption efficiency and shortening adsorption time. On the other hand, during negative pressure desorption, the desorbed gas can pass through the filter tube more smoothly in reverse, reducing flow resistance within the filter tube and making the desorption process more efficient.

[0008] The tube wall comprises multiple layers of activated carbon fibers and multiple layers of spacers, with the activated carbon fibers and spacers arranged at intervals.

[0009] In some implementations...

[0010] The inner and outer surfaces of the pipe wall are both partitions, which are Teflon breathable membranes or organic solvent resistant non-woven fabrics.

[0011] An air inlet is provided at the top of the adsorption tank, and an air outlet is provided at the bottom of the adsorption tank. A filter tube matrix is ​​arranged between the air inlet and the air outlet.

[0012] In some embodiments, a gas distributor is provided at the air inlet. The gas distributor is a porous plate structure, including a main board on which several vent holes with a diameter of 2-10 mm can be arranged. This allows the oil and gas entering the adsorption tank to be evenly dispersed into the filter tube matrix, ensuring that each activated carbon fiber filter tube can fully contact the oil and gas and improve the adsorption efficiency.

[0013] In some embodiments, the diameter of the vent hole near the center of the motherboard is smaller than the diameter of the vent hole farther from the center.

[0014] In some embodiments, the difference between the diameter of the vent hole furthest from the center point of the motherboard and the diameter of the vent hole closest to the center point of the motherboard is 0.5-1.5 mm.

[0015] In some embodiments, the negative pressure device includes a vacuum pump connected to the outlet of the adsorption tank via a pipe, and the vacuum pump has a pumping rate of 50L / min-100L / min.

[0016] In some embodiments, a gas distribution device is provided at the connection between the pipeline and the adsorption tank. The gas distribution device ensures that the desorption gas acts uniformly on the filter tube matrix, so that the adsorbed oil and gas in each filter tube can be completely desorbed under the combined action of negative pressure and desorption gas, thereby improving the efficiency and quality of oil and gas recovery.

[0017] In some implementations, the distance S1 from the gas distributor to the filter tube matrix and the distance S2 from the gas distribution device to the filter tube matrix are 4-6 cm.

[0018] In some embodiments, the bottom outlet of the adsorption tank is connected to a recovery pipe, which is equipped with a valve and an oil and gas collection container for collecting the desorbed oil and gas.

[0019] Compared with the prior art, the advantages of this utility model are: uniform gas distribution and high utilization rate of adsorption material; thin wall thickness and low resistance; excellent negative pressure desorption effect; through the design of gas distributor and gas distribution device, the uniform distribution of gas during adsorption and desorption is ensured, which can optimize the entire oil and gas adsorption, negative pressure desorption and recovery process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the oil and gas adsorption negative pressure desorption and recovery device in some embodiments of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the adsorption tank in some embodiments of this utility model;

[0022] Figure 3 This is a schematic diagram of the gas distributor in some embodiments of this utility model;

[0023] Figure 4 This is a schematic diagram of the arrangement structure of the filter tubes in the filter tube matrix in some embodiments of this utility model;

[0024] Figure 5 This is a schematic diagram of the filter tube in a specific embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the filter tube in another specific embodiment of the present invention. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1 to 4The figure shows a preferred embodiment of this utility model, which discloses an oil and gas adsorption negative pressure desorption and recovery device, including an adsorption tank 1, a negative pressure device 3 connected to one side of the adsorption tank 1, and a filter tube matrix 2 arranged inside the adsorption tank 1. The filter tube matrix includes multiple filter tubes 201 made of activated carbon fibers. The adsorption tank 1 is provided with an air inlet 101 and an air outlet 102, and the filter tube matrix 2 is arranged between the air inlet 101 and the air outlet 102. The wall thickness L of the filter tubes 201 can be 10 mm to 50 mm. The filter tubes 201 made of activated carbon fibers can effectively utilize the good adsorption performance and microporous structure of activated carbon fibers themselves. During the negative pressure desorption process, when a negative pressure is applied from the outside, the oil and gas molecules in the internal pores are more likely to overcome the adsorption force and desorb. At the same time, combined with the characteristics of thin filter tube wall and low resistance, the desorbed gas can enter the interior of the filter tube more effectively and carry out the desorbed oil and gas molecules.

[0028] In some specific implementations, the wall of the filter tube 201 comprises multiple layers of activated carbon fibers 212 and multiple layers of spacers 211, with the activated carbon fibers 212 and spacers 211 arranged alternately. The specific arrangement structure can be as follows: Figure 5 or Figure 6 The structure shown has a partition 211 on both the inner and outer sides of the tube wall. The partition 211 can be a Teflon breathable membrane or an organic solvent-resistant nonwoven fabric.

[0029] The air inlet 101 can be located at the top of the adsorption tank 1, and the air outlet 102 can be located at the bottom of the adsorption tank 1.

[0030] A gas distributor 4 can be added to the aforementioned air inlet 101. This gas distributor 4 is a perforated plate structure, and its specific structure can be as follows: Figure 3 The structure shown includes a gas distributor 4 comprising a main board 401, on which several vent holes 402 with diameters of 2 mm to 10 mm can be arranged. The first vent hole can also be a vent hole of other shapes. The diameter of the vent hole near the center of the main board 401 is smaller than the diameter of the vent hole far from the center.

[0031] In some specific implementations, the difference between the diameter of the vent hole furthest from the center point of the motherboard 401 and the diameter of the vent hole closest to the center point of the motherboard 401 can be 0.5-1.5 mm.

[0032] The aforementioned negative pressure device 3 includes a vacuum pump. The inlet of the vacuum pump is connected to the outlet 102 of the adsorption tank through a pipe. The pumping speed of the vacuum pump can be 50L / min-100L / min. A gas distribution device 5 can also be added at the connection between the pipe and the adsorption tank 1. The gas distribution device 5 can adopt the same structure as the gas distributor 4, or adopt other existing gas distributor structures.

[0033] In some specific implementations, the distance S1 from the gas distributor 4 to the filter tube matrix and the distance S2 from the gas distribution device 5 to the filter tube matrix can be 4-6 cm, such as 5 cm.

[0034] Furthermore, the outlet 102 at the bottom of the adsorption tank 1 can be directly connected to a recovery pipeline, on which valves and an oil and gas collection container can be installed to collect the desorbed oil and gas. The recovery pipeline described herein can also be connected to the outlet of a vacuum pump.

[0035] The working principle of the above-mentioned oil and gas adsorption negative pressure desorption and recovery device is as follows:

[0036] Adsorption process: The oil-containing gas enters from the inlet 101 at the top of the adsorption tank 1 and is evenly dispersed into the filter tube matrix 2 by the gas distributor 4. The filter tubes 201 adsorb the oil-containing gas, and the purified gas is discharged from the outlet 102 at the bottom of the adsorption tank 1.

[0037] Desorption process: Once the activated carbon fiber filter tubes are saturated with adsorption, the vacuum pump is activated, and a negative pressure is applied to the inside of the adsorption tank 1 through the pipeline and gas distribution device 5. The desorption gas is accelerated and sprayed onto the filter tube matrix 2 through the gas distributor 4, causing the oil and gas adsorbed in the filter tubes 201 to be desorbed under the combined action of the negative pressure and the desorption gas. The desorbed oil and gas enter the oil and gas collection container through the recovery pipeline for collection.

[0038] All of the above-mentioned undisclosed matters can be implemented using existing technologies, so they will not be elaborated here.

[0039] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0041] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. An oil and gas adsorption negative pressure desorption recovery device, characterized in that, The oil and gas adsorption negative pressure desorption recovery device comprises an adsorption tank body, a negative pressure device connected to one side of the adsorption tank body, a filter pipe matrix arranged in the adsorption tank body, a plurality of filter pipes made of activated carbon fibers in the filter pipe matrix, an air inlet and an air outlet arranged on the adsorption tank body, and the filter pipe matrix arranged between the air inlet and the air outlet.

2. The oil and gas adsorption negative pressure desorption recovery device according to claim 1, wherein: the wall thickness of the filter pipe is 10-50mm; the pipe wall comprises a plurality of layers of activated carbon fibers and a plurality of layers of separation layers, and the activated carbon fibers are arranged in a spaced manner with the separation layers.

3. The oil and gas adsorption negative pressure desorption recovery device according to claim 2, wherein: the inner side and the outer side of the pipe wall are both separation layers, and the separation layers are Teflon breathable membranes or organic solvent-resistant non-woven fabrics; an air inlet is arranged at the top of the adsorption tank body, an air outlet is arranged at the bottom of the adsorption tank body, and the filter pipe matrix is arranged between the air inlet and the air outlet.

4. The oil and gas adsorption negative pressure desorption recovery device according to claim 3, characterized in that: a gas distributor is arranged at the air inlet, the gas distributor is in a multi-hole plate structure, and the gas distributor comprises a main plate, a plurality of air holes with a diameter of 2-10mm are arranged on the main plate.

5. The oil and gas adsorption negative pressure desorption recovery device according to claim 4, characterized in that: the hole diameter of the air hole close to the center position on the main plate is smaller than the hole diameter of the air hole away from the center position.

6. The oil and gas adsorption negative pressure desorption recovery device according to claim 5, characterized in that: the difference between the hole diameter of the air hole farthest from the center point of the main plate and the hole diameter of the air hole closest to the center point of the main plate is 0.5-1.5mm.

7. The oil and gas adsorption negative pressure desorption recovery device according to claim 4, characterized in that: the negative pressure device comprises a vacuum pump, the vacuum pump is connected to the air outlet of the adsorption tank body through a pipeline, and the air suction rate of the vacuum pump is 50-100L / min.

8. The oil and gas adsorption negative pressure desorption recovery device according to claim 7, characterized in that: a gas distribution device is arranged at the connection between the pipeline and the adsorption tank body.

9. The oil and gas adsorption negative pressure desorption recovery device according to claim 8, characterized in that: the distance S1 from the gas distributor to the filter pipe matrix and the distance S2 from the gas distribution device to the filter pipe matrix are 4-6mm.

10. The oil and gas adsorption negative pressure desorption recovery device according to claim 3, characterized in that: a recovery pipeline is connected to the air outlet at the bottom of the adsorption tank body, and a valve and an oil and gas collection container are arranged on the recovery pipeline.

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