An oil and gas separator

Abstract

The present application relates to oil and gas recovery technical field, specifically disclose a kind of oil-gas separator, comprising: recovery pipeline, recovery pipeline is communicated with tank car airtight cover gas outlet;Condensation dehumidification tank, condensation dehumidification tank is communicated with recovery pipeline and condensation dehumidification tank inside is equipped with the condensing pipeline that can be condensed to the mixture of gasoline and air;Absorption tower, absorption tower is communicated with condensation dehumidification tank and is communicated with the adsorbent pipeline for adsorbing gasoline in mixture;Vacuum desorption tank, vacuum desorption tank is communicated with the top of absorption tower, for desorbing the oil gas absorbed by adsorbent;Heat exchange tank, heat exchange tank is communicated with vacuum desorption tank, for the oil gas desorbed is cooled;Storage tank, storage tank is communicated with heat exchange tank, for storing the gasoline after cooling, solve the problem that traditional oil and gas recovery is not treated in humid area of oil depot or oil depot is in humid environment, leading to the performance reduction of gasoline recovery.

Description

Technical Field

[0001] This application relates to the field of oil and gas recovery technology, and specifically discloses an oil and gas separator. Background Technology

[0002] Gasoline is one of the most consumed light petroleum products and an important fuel for engines. It is produced through crude oil fractionation and heavy distillation. Gasoline possesses properties of volatility, anti-knock properties, stability, safety, and corrosiveness. Gasoline vapors are emitted during gasoline production, storage, transportation, and refueling at gas stations. Failure to recover and purify these vapors not only causes environmental pollution but also represents a significant waste of resources. Therefore, a dedicated vapor recovery system is specifically designed for the gasoline bottling process at oil depots to recover the gasoline vapors emitted during bottling.

[0003] Existing technologies for gasoline vapor recovery include activated carbon adsorption, absorption, membrane separation, and condensation. For oil vapor recovery systems in oil depots using the absorption method, the typical process flow is as follows: Under slight positive pressure, the gasoline vapor from the tanker truck enters the absorption tower through the sealed outlet via an external pipeline. In the tower's packing layer, it comes into counter-current contact with a specialized absorbent sprayed from the top. The absorbent selectively absorbs hydrocarbons from the gasoline vapor, separating them from the air. Gases not absorbed are discharged through a flame arrester and completely treated by combustion. The absorbent then enters a vacuum desorption tank under pressure differential, where it desorbs the absorbed gasoline vapor under vacuum conditions, regenerating the absorbent. The desorbed gasoline vapor is then transported by a vacuum unit to a reabsorption tower, where it is fully absorbed by refined oil and then transported to the refined oil storage tank, achieving gasoline vapor recovery.

[0004] However, in oil depots located in humid areas or in environments with high humidity, the high moisture content in the air leads to a high moisture content in the mixture of oil and gas entering the absorption tower. This not only affects the performance of the absorbent during recycling but also causes moisture to adhere to the walls and pores of the absorption tower's packing, hindering the contact between the oil and gas mixture and the absorbent. Consequently, the adsorption effect of the absorbent on the oil and gas is reduced, resulting in a decrease in oil and gas recovery efficiency. Furthermore, since a small amount of oil and gas that is not absorbed by the absorbent needs to be combusted for purification, the moisture in the air discharged from the top of the absorption tower will affect the combustion of this portion of oil and gas, leading to the release of oil and gas into the external environment and causing pollution.

[0005] Therefore, the inventors have provided an oil-gas separator to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to solve the problem that traditional oil and gas recovery processes do not treat moisture in the air, which leads to reduced performance of gasoline recovery when the oil depot is located in a humid area or in a humid environment.

[0007] To achieve the above objectives, the basic solution of the present invention provides an oil-gas separator, comprising:

[0008] A recycling pipeline, wherein the recycling pipeline is connected to the vent of the sealed cover of the tanker truck;

[0009] A condensation dehumidification tank, wherein the condensation dehumidification tank is connected to the recovery pipeline and the condensation dehumidification tank is provided with a condensation pipeline inside which can condense a mixture of gasoline and air;

[0010] An absorption tower, which is connected to the condensation dehumidification tank and is connected to an adsorbent pipe for adsorbing gasoline in the mixture;

[0011] A vacuum desorption tank, which is connected to the top of the absorption tower, is used to desorb the oil and gas absorbed by the adsorbent;

[0012] A heat exchange tank, which is connected to the vacuum desorption tank, is used to cool the desorbed oil and gas;

[0013] A storage tank, which is connected to the heat exchange tank, is used to store cooled gasoline.

[0014] The principle and effect of this basic scheme are as follows:

[0015] This invention addresses the issue of oil depots in humid areas or in environments where oil depots are located in damp locations. A condensation dehumidification tank is installed between the absorption tower and the air outlet of the tanker truck's sealed cover. The condensation pipes within the dehumidification tank condense the oil-gas mixture, removing most of the water vapor. This reduces the water vapor content of the oil-gas mixture entering the absorption tower, preventing water vapor from affecting the adsorption effect of the absorbent during recycling. It also prevents water vapor from affecting the combustion of residual oil and gas discharged from the top of the absorption tower, thereby improving the recovery performance of gasoline. Furthermore, it avoids the environmental pollution caused by the emission of oil and gas into the external environment. This invention solves the problem of reduced gasoline recovery performance in traditional oil and gas recovery methods that fail to treat moisture in the air when the oil depot is located in a humid environment.

[0016] Furthermore, the condensation dehumidification tank includes a tank body, a mixture inlet pipe connected to the bottom of the tank body, and a mixture outlet pipe connected to the top of the tank body. The opposite side walls of the tank body are respectively connected to a coolant inlet pipe and a coolant outlet pipe.

[0017] The condensation pipe is located between the coolant inlet pipe and the coolant outlet pipe, and the tank body is provided with a collection tank located below the condensation pipe, and the side wall of the tank body is provided with a liquid recovery pipe communicating with the collection tank.

[0018] With the above setup, the liquid water droplets generated during the condensation of the oil-gas mixture in the condensation pipe are collected in the collection tank, and discharged to the outside through the liquid recovery pipe.

[0019] Furthermore, it also includes:

[0020] A cooling water tank is used to store the cooling medium used in the heat exchanger to cool the desorbed oil and gas. The coolant outlet pipe is connected to the cooling water tank.

[0021] A filter is provided between the liquid recovery pipe and the cooling water tank, and the liquid in the liquid recovery pipe is filtered and discharged into the cooling water tank.

[0022] With the above setup, taking advantage of the low temperature of the medium in the condensation pipe, the medium in the condensation pipe is introduced into the cooling water tank through the coolant outlet pipe for storage and used as the cooling medium for cooling oil and gas in the heat exchanger. This improves the utilization rate of the medium in the condensation pipe. At the same time, the liquid water collected in the collection tank is also a low-temperature medium. After being filtered by the filter, it can be discharged into the cooling water tank as the cooling medium for cooling oil and gas in the heat exchanger, thus improving the utilization rate of water vapor.

[0023] Furthermore, the condensate pipe includes:

[0024] An inner tube is fixedly connected between the coolant inlet pipe and the coolant outlet pipe;

[0025] An outer tube is sleeved outside the inner tube and rotatably connected between the coolant inlet pipe and the coolant outlet pipe;

[0026] A cooling medium channel is formed between the inner tube and the outer tube, and a number of blades are evenly arranged on the inner wall of the outer tube.

[0027] A sleeve is symmetrically disposed on the inner wall of the tank, and the ends of the outer tube are rotatably connected to the sleeve.

[0028] The outer wall of the tank is symmetrically provided with liquid conversion plates. The liquid conversion plates contain conversion chambers that are respectively connected to the coolant inlet pipe and the coolant outlet pipe. The side walls of the liquid conversion plates and the side walls of the tank are uniformly provided with a plurality of guide holes that can connect the conversion chambers to the cooling medium channel.

[0029] With the above configuration, the cooling medium channel between the inner tube and the outer tank is used to allow the coolant to pass through, thereby avoiding the problem of the coolant being located in the middle of the condenser pipe without contacting the pipe wall, which would reduce the cooling performance. In addition, during the flow of the coolant, the outer tube is rotated by impacting the blades, thus keeping the outer tube in a rotating state to improve the condensation effect of the oil-gas mixture on the outer tube. The sleeve ensures the sealing performance of the outer tube when it rotates, and at the same time, it plays a supporting and limiting role for the outer tube. The liquid conversion plate connects the cooling medium channel, the coolant inlet pipe and the coolant outlet pipe, thus preventing coolant leakage.

[0030] Furthermore, the collection tank is provided with a scraper that can fit against the bottom of the outer tube, and both sides of the collection tank are provided with guide plates that can shield the scraper to prevent the mixture in the tank from directly contacting the scraper. A gap channel is formed between the guide plates and the outer tube.

[0031] With the above configuration, by setting up a scraper, the outer wall of the outer pipe comes into contact with the scraper during the rotation of the outer pipe. The water mist that is cooled and liquefied on the outer wall of the outer pipe is scraped by the scraper and collected into the collection tank, preventing the water mist from adhering to the surface of the outer pipe and affecting the condensation effect of the outer pipe on the oil-gas mixture. At the same time, the two guide plates not only guide the flow of the oil-gas mixture, but also isolate the scraper from the oil-gas mixture, preventing the water droplets scraped off the scraper from mixing back into the oil-gas mixture, and also preventing the oil-gas mixture from entering the liquid recovery pipe.

[0032] Furthermore, the tank body is also provided with a fixing frame, which includes a fixing shaft located inside the inner tube, a plurality of connecting rods disposed between the fixing shaft and the inner tube, and a plurality of conductive rods disposed inside the fixing shaft and the connecting rods. The conductive rods located inside the fixing shaft extend through the side wall of the tank body and are connected to the ground.

[0033] The above setup allows the fixed shaft and connecting rod to fix and support the inner tube. At the same time, the conductive rods embedded in the fixed shaft and connecting rods discharge any static electricity that may be generated during the blade rotation, thus avoiding potential safety hazards.

[0034] Furthermore, the absorption tower includes:

[0035] The tower body has an oil and gas inlet pipe connected to the bottom of its side wall, an absorbent feed pipe connected to the top of its side wall, a discharge pipe connected to the bottom of its bottom, and an air exhaust pipe connected to the top of its top.

[0036] The guide assembly includes a fixed column vertically disposed within the tower body and spiral blades evenly disposed on the fixed column. The ends of the spiral blades are attached to the inner wall of the tower body. The bottom of the fixed column is connected to the top of the discharge pipe, and the side wall of the fixed column is evenly provided with a plurality of openings that can connect the tower body and the discharge pipe. The bottom surface of the spiral blade is evenly provided with bottom guide plates that are inclined upward along the spiral direction, and the top surface of the spiral blade is evenly provided with a plurality of top guide plates that are inclined downward along the spiral direction.

[0037] The above configuration increases the flow path between the adsorbent and the oil-gas mixture, allowing for more thorough contact and improving the adsorbent's absorption efficiency of hydrocarbons in the mixture. Since the oil-gas mixture is gaseous and primarily flows along the top of the spiral blades, the top guide plate guides its flow, causing it to impact the bottom surface of the spiral blades and thus contact the adsorbent. Conversely, the liquid adsorbent primarily flows along the bottom of the spiral blades; the bottom guide plate also guides its flow, causing it to impact the top surface of the spiral blades and thus contact the oil-gas mixture, further enhancing the adsorbent's absorption efficiency of hydrocarbons in the mixture.

[0038] Furthermore, the top guide plate and the bottom guide plate are staggered, with the bottommost horizontal position of the top guide plate being lower than the topmost horizontal position of the adjacent bottom guide plate, forming an interactive gap between the top guide plate and the bottom guide plate.

[0039] The above settings allow for more thorough contact between the absorbent and the oil-gas mixture, further enhancing the absorbency of the absorbent for hydrocarbons in the mixture.

[0040] Based on the same inventive concept, the present invention provides an oil-gas separation method, including using the above-mentioned oil-gas separator to recover the oil and gas loaded on the vehicle.

[0041] Furthermore, the steps for recovering the oil and gas from the vehicle using the aforementioned oil-gas separator are as follows:

[0042] Step S001: Under a slight positive pressure, the oil and gas mixture enters the condensation and dehumidification tank through the gas outlet of the sealed cover of the tanker truck and the recovery pipe. The condensation pipe in the condensation and dehumidification tank condenses the water vapor in the oil and gas mixture, removing most of the water vapor in the oil and gas mixture.

[0043] In step S002, the oil and gas mixture after removing water vapor enters the absorption tower, and at the same time, absorbent is introduced into the top of the absorption tower. The absorbent comes into countercurrent contact with the oil and gas mixture in the absorption tower. The absorbent selectively absorbs the hydrocarbon oil and gas, and the gas that is not absorbed by the absorbent is discharged through the flame arrester and completely treated by combustion.

[0044] In step S003, the absorbent enters the vacuum desorption tank under the action of pressure difference, and the absorbed oil and gas are desorbed under vacuum conditions. The absorbent is regenerated in the vacuum desorption tank and then introduced into the absorption tower.

[0045] In step S004, the desorbed oil and gas are cooled by a heat exchange tank and then stored in a storage tank.

[0046] The above method for recovering gasoline vapors from vehicles avoids water vapor affecting the adsorption effect of the absorbent during recycling, and also prevents water vapor from affecting the combustion of residual gasoline vapors discharged from the top of the absorption tower. This improves the recovery performance of gasoline and avoids environmental pollution caused by the emission of gasoline vapors into the external environment. It also solves the problem of reduced gasoline recovery performance in traditional gasoline vapor recovery methods that fail to treat moisture in the air, especially in humid oil depots or oil depots located in humid environments. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 A system diagram of an oil-gas separator according to an embodiment of this application is shown;

[0049] Figure 2 This paper shows a cross-sectional view of one side of a condenser dehumidifier tank in an oil-gas separator according to an embodiment of this application.

[0050] Figure 3 This paper shows a cross-sectional view of the other side of the condensation dehumidification tank in an oil-gas separator according to an embodiment of this application;

[0051] Figure 4 A schematic diagram of the internal structure of the absorption tower in an oil-gas separator according to an embodiment of this application is shown. Detailed Implementation

[0052] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0053] The reference numerals in the accompanying drawings include: oil tank 1, condensate dehumidification tank 2, tank body 201, mixture inlet pipe 202, mixture outlet pipe 203, inner pipe 204, outer pipe 205, sleeve 206, guide block 207, fixed shaft 208, conductive rod 209, guide plate 210, scraper 211, liquid recovery pipe 212, coolant inlet pipe 213, coolant outlet pipe 214, liquid conversion plate 215, flow guide hole 216, absorption tower 3, tower body 30. 1. Oil and gas inlet pipe 302. Absorbent inlet pipe 303. Discharge pipe 304. Fixed column 305. Air exhaust pipe 306. Spiral blade 307. Bottom guide plate 308. Top guide plate 309. Opening 310. Vacuum desorption tank 4. Heat exchange tank 5. Fusion tower 6. Storage tank 7. Cooling water tank 8. Filter 9. Fan 10. Coolant pump 11. Condensate pump 12. Circulation pump 13. Drain pump 14. Solvent pump 15. Lean oil pump 16. Rich oil pump 17.

[0054] An oil-gas separator, implementing, for example Figure 1 As shown, it includes the following structure:

[0055] Recovery pipeline: The recovery pipeline is connected to the vent of the sealed cover of the tank truck, and the oil and gas loaded on the truck enter the recovery pipeline under a slight positive pressure.

[0056] Condensation dehumidification tank 2: Condensation dehumidification tank 2 is connected to the recovery pipeline, and its internal structure is as follows. Figure 2 and Figure 3As shown, the system includes a tank 201, a mixture inlet pipe 202 connected to the bottom of the tank 201, a mixture outlet pipe 203 connected to the top of the tank 201, and coolant inlet pipes 213 and 214 respectively located on the left and right sides of the tank 201. The coolant inlet pipe 213 is connected to a coolant pump 11. Both the coolant inlet pipe 213 and the coolant outlet pipe 214 are connected to the tank 201 via a liquid transfer plate 215 located on the outer wall of the tank 201. The liquid transfer plate 215 contains transfer chambers that communicate with the coolant inlet pipe 213 and the coolant outlet pipe 214 respectively. The tank 201 is equipped with a condensing pipe located between two liquid conversion plates 215. The condensing pipe includes an inner pipe 204, an outer pipe 205, and a sleeve 206. The inner pipe 204 and the sleeve 206 are fixedly connected to the inner wall of the tank 201, while the outer pipe 205 is rotatably connected to the inner wall of the tank 201. The end of the outer pipe 205 is located between the sleeve 206 and the inner pipe 204 and is rotatably connected to the sleeve 206. A cooling medium channel is formed between the inner pipe 204 and the outer pipe 205. The inner wall of the outer pipe 205 is uniformly provided with several blades. The side walls of the liquid conversion plates 215 and the side walls of the tank 201 are uniformly provided with several blades that can connect the conversion chamber to the cooling medium. A guide hole 216 is connected to the medium channel; a collection tank located below the condensation pipe is provided inside the tank body 201, and a liquid recovery pipe 212 connected to the collection tank is provided on the side wall of the tank body 201. A scraper 211 that can fit against the bottom of the outer pipe 205 is provided inside the collection tank. Guide plates 210 are provided on both sides of the collection tank to block the scraper 211 and prevent the mixture in the tank body 201 from directly contacting the scraper 211. A gap channel is formed between the guide plate 210 and the outer pipe 205 to prevent the guide plate 210 from directly contacting the outer pipe 205; a guide tube located on the upper part of the outer pipe 205 is also provided inside the tank body 201. The block 207 causes the oil-gas mixture to flow upward along the outer wall of the outer pipe 205; a fixing frame for supporting the inner pipe 204 is also provided inside the tank body 201. The fixing frame includes a fixing shaft 208 located inside the inner pipe 204, several connecting rods between the fixing shaft 208 and the inner pipe 204, and several conductive rods 209 located inside the fixing shaft 208 and the connecting rods. The conductive rods 209 located inside the fixing shaft 208 pass through the side wall of the tank body 201 and the side wall of the liquid conversion plate 215 and are connected to the ground. Protective rubber sleeves are provided for the contact parts of the conductive rods 209 with the tank body 201, the liquid conversion plate 215 and the coolant.

[0057] Absorption Tower 3: Absorption Tower 3 is connected to the condensation dehumidification tank 2. The internal structure of Absorption Tower 3 is as follows: Figure 4As shown, the system includes a tower body 301 and a guide assembly disposed within the tower body 301. The bottom of the side wall of the tower body 301 is connected to an oil / gas inlet pipe 302 for connection to a condensation dehumidification tank 2. The top of the side wall of the tower body 301 is connected to an absorbent inlet pipe 303, the absorbent supplied in the absorbent inlet pipe 303 being ABSFOV-97. The bottom of the tower body 301 is connected to a discharge pipe 304, and the top of the tower body 301 is connected to an air exhaust pipe 306. The guide assembly includes a vertically mounted fixed column 305 within the tower body 301 and spiral blades 307 evenly distributed on the fixed column 305. The ends of the spiral blades 307 are fitted against the inner wall of the tower body 301. The bottom of the fixed column 305 is connected to the top of the discharge pipe 304, and the side wall of the fixed column 305 is evenly provided with several guides that can guide the tower body... The opening 310, which connects to the discharge pipe 304, has a bottom guide plate that is uniformly inclined upward along the spiral direction on the bottom surface of the spiral blade 307. The top of the spiral blade 307 has several top guide plates that are uniformly inclined downward along the spiral direction. The top guide plates and the bottom guide plates are staggered. The bottom horizontal position of the top guide plate is lower than the top horizontal position of the adjacent bottom guide plate. An interactive gap is formed between the top guide plate and the bottom guide plate. Both the top guide plate and the bottom guide plate are made of plates with dense pores, so that some absorbent and oil-gas mixture can pass through the pores, preventing dead corners where absorbent and oil-gas mixture accumulate. The air discharge pipe 306 of the absorption tower 3 is also equipped with an air supply pipe supplied with air by the fan 10.

[0058] Vacuum desorption tank 4: Vacuum desorption tank 4 is connected to the top of absorption tower 3 through discharge pipe 304 and is used to desorb the oil and gas absorbed by the adsorbent. The adsorbent regenerated in vacuum desorption tank 4 enters absorption tower 3 through solvent pump 15 and adsorbent feed pipe 303.

[0059] Heat exchange tank 5: Heat exchange tank 5 is connected to vacuum desorption tank 4. The desorbed oil and gas are cooled by passing through heat exchange tank 5. Correspondingly, a cooling water tank 8 is configured. The coolant in the cooling water tank 8 is supplied by the coolant outlet pipe 214 of the condensation dehumidification tank 2. A condensate pump 12 and a filter 9 are installed between the liquid recovery pipe 212 and the cooling water tank 8 to allow condensate to enter the cooling water tank 8. A circulation pipe and a circulation pump 13 are installed between the cooling water tank 8 and the heat exchange tank 5 to supply coolant to the heat exchange tank 5 to cool the oil and gas. The cooling water tank 8 is also equipped with a corresponding drain pipe and a drain pump 14.

[0060] Storage tank 7: Storage tank 7 is connected to the heat exchange tank 5 and is used to store cooled gasoline.

[0061] In another embodiment, a fusion tower 6 is also configured. The top of the fusion tower 6 is connected to the storage tank 7 via a lean oil pump 16, and the bottom of the fusion tower 6 is connected to the storage tank 7 via a rich oil pump 17. A vent pipe is provided at the top of the fusion tower 6. The fusion tower 6 can be configured to mix lean oil with desorbed oil and gas to form rich oil for storage.

[0062] In the implementation of this invention, under a slight positive pressure, the oil and gas mixture is drawn from the tanker truck's sealed cover outlet through the recovery pipe into the condensation and dehumidification tank 2 and flows from bottom to top. Simultaneously, the coolant pump 11 supplies coolant at 4-10°C to the condensation and dehumidification tank 2. The coolant flows in the cooling medium channel and condenses and cools the oil and gas mixture through the outer pipe 205, causing water vapor in the mixture to liquefy and adhere to the outer wall surface. During the flow, the coolant impacts the blades, causing the outer pipe 205 to rotate, thus maintaining its rotation. The outer wall of the outer pipe 205 contacts the scraper 211, and the water mist liquefied on the outer wall is scraped away by the scraper 211 and collected in the collection tank. This prevents water mist from adhering to the surface of the outer pipe 205 and affecting its condensation effect on the oil and gas mixture. The condensate in the collection tank is then collected through the liquid recovery pipe 212 and condensation... Water pump 12 and filter 9 enter cooling water tank 8; the oil-gas mixture after most of the water vapor has been removed enters absorption tower 3, and absorbent is introduced into the top of absorption tower 3. The oil-gas mixture flows along the top of spiral blade 307 and impacts the bottom surface of spiral blade 307 under the guidance of top guide plate 309. The absorbent flows along the bottom of spiral blade 307 and impacts the top surface of spiral blade 307 under the guidance of bottom guide plate 308. The absorbent comes into countercurrent contact with the oil-gas mixture in absorption tower 3. The absorbent selectively absorbs hydrocarbon oil and gas. Gases not absorbed by the absorbent are discharged through flame arresters and completely treated by combustion. The absorbent enters vacuum desorption tank 4 under pressure difference. Under vacuum conditions, the absorbed oil and gas are desorbed. The absorbent is regenerated in vacuum desorption tank 4 and then introduced into absorption tower 3. The desorbed oil and gas are cooled by heat exchange tank 5 and then stored in storage tank 7.

[0063] The aforementioned oil-gas separator, designed for oil depots in humid areas or in humid environments, incorporates a condensation dehumidification tank 2 between the absorption tower 3 and the tank truck's sealed outlet. The condensation pipes within the tank 2 condense the oil-gas mixture, removing most of the water vapor. This reduces the water vapor content of the mixture entering the absorption tower 3, preventing water vapor from affecting the adsorption effect of the absorbent during recycling. It also prevents water vapor from affecting the combustion of residual oil and gas discharged from the top of the absorption tower 3, thereby improving the recovery performance of gasoline. Furthermore, it avoids the environmental pollution caused by oil and gas emissions into the external environment. This solves the problem of reduced gasoline recovery performance in traditional oil-gas recovery methods that fail to treat moisture in the air when operating in humid areas or in humid environments.

[0064] Based on the same inventive concept, this invention provides an oil-gas separation method, including using the above-mentioned oil-gas separator to recover oil and gas from the vehicle, with the specific steps as follows:

[0065] In step S001, under a slight positive pressure, the oil and gas mixture enters the condensation and dehumidification tank 2 from the air outlet of the tanker's sealed cover through the recovery pipe and flows from bottom to top. At the same time, the coolant pump 11 supplies coolant at 4-10°C into the condensation and dehumidification tank 2. The coolant flows in the cooling medium channel and condenses and cools the oil and gas mixture through the outer pipe 205, causing the water vapor in the oil and gas mixture to liquefy and adhere to the outer wall surface. During the flow of the coolant, the outer pipe 205 is rotated by impacting the blades, thus keeping the outer pipe 205 in a rotating state. The outer wall of the outer pipe 205 contacts the scraper 211. The water mist liquefied on the outer wall of the outer pipe 205 is scraped by the scraper 211 and collected in the collection tank, preventing the water mist from adhering to the surface of the outer pipe 205 and affecting the condensation effect of the outer pipe 205 on the oil and gas mixture. The condensate in the collection tank enters the cooling water tank 8 through the liquid recovery pipe 212, the condensate pump 12, and the filter 9.

[0066] In step S002, the oil and gas mixture after removing water vapor enters the absorption tower 3. At the same time, absorbent is introduced into the top of the absorption tower 3. The absorbent comes into countercurrent contact with the oil and gas mixture in the absorption tower 3. The absorbent selectively absorbs the hydrocarbon oil and gas. The gas that is not absorbed by the absorbent is discharged through the flame arrester and completely treated by combustion.

[0067] In step S003, the oil-gas mixture after most of the water vapor has been removed enters the absorption tower 3. At the same time, absorbent is introduced into the top of the absorption tower 3. The oil-gas mixture flows along the top of the spiral blade 307 and impacts the bottom surface of the spiral blade 307 under the guidance of the top guide plate 309. The absorbent flows along the bottom of the spiral blade 307 and impacts the top surface of the spiral blade 307 under the guidance of the bottom guide plate 308. The absorbent comes into countercurrent contact with the oil-gas mixture in the absorption tower 3. The absorbent selectively absorbs the hydrocarbon oil and gas. The gas that is not absorbed by the absorbent is discharged through the flame arrester and completely treated by combustion.

[0068] In step S004, the desorbed oil and gas are cooled by the heat exchange tank 5 and then stored in the storage tank 7. In another embodiment, the desorbed oil and gas are mixed with lean oil by the fusion tower 6 to form rich oil for storage.

[0069] Using the above method, most of the water vapor in the oil-gas mixture can be removed, thereby reducing the water vapor content of the oil-gas mixture entering the absorption tower 3. This prevents water vapor from affecting the adsorption effect of the absorbent during recycling and also prevents water vapor from affecting the combustion of residual oil and gas discharged from the top of the absorption tower 3. This improves the recovery performance of gasoline and avoids the problem of oil and gas being emitted into the external environment, which would cause environmental pollution. It also solves the problem that traditional oil and gas recovery methods do not treat the moisture in the air when the oil depot is in a humid area or in a humid environment, which would lead to a decrease in the performance of gasoline recovery.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An oil-gas separator, characterized in that, include: A recycling pipeline, wherein the recycling pipeline is connected to the vent of the sealed cover of the tanker truck; A condensation dehumidification tank, wherein the condensation dehumidification tank is connected to the recovery pipeline and the condensation dehumidification tank is provided with a condensation pipeline for condensing a mixture of gasoline and air; An absorption tower, which is connected to the condensation dehumidification tank and is connected to an adsorbent pipe for adsorbing gasoline in the mixture; A vacuum desorption tank, which is connected to the top of the absorption tower, is used to desorb the oil and gas absorbed by the adsorbent; A heat exchange tank, which is connected to the vacuum desorption tank, is used to cool the desorbed oil and gas; A storage tank, which is connected to the heat exchange tank, is used to store cooled gasoline. The condensation dehumidification tank includes a tank body, a mixture inlet pipe connected to the bottom of the tank body, and a mixture outlet pipe connected to the top of the tank body. The opposite side walls of the tank body are respectively connected to a coolant inlet pipe and a coolant outlet pipe. The condensation pipe is located between the coolant inlet pipe and the coolant outlet pipe, and the tank body is provided with a collection tank located below the condensation pipe, and the side wall of the tank body is provided with a liquid recovery pipe communicating with the collection tank. The condensate pipe includes: An inner tube is fixedly connected between the coolant inlet pipe and the coolant outlet pipe; An outer tube is sleeved outside the inner tube and rotatably connected between the coolant inlet pipe and the coolant outlet pipe; A cooling medium channel is formed between the inner tube and the outer tube, and a number of blades are evenly arranged on the inner wall of the outer tube. A sleeve is symmetrically disposed on the inner wall of the tank, and the ends of the outer tube are rotatably connected to the sleeve. The outer wall of the tank is symmetrically provided with liquid conversion plates. The liquid conversion plates contain conversion chambers that are respectively connected to the coolant inlet pipe and the coolant outlet pipe. The side wall of the liquid conversion plates and the side wall of the tank are uniformly provided with a plurality of guide holes that connect the conversion chambers to the cooling medium channel.

2. The oil-gas separator according to claim 1, characterized in that, Also includes: A cooling water tank is used to store the cooling medium used in the heat exchanger to cool the desorbed oil and gas. The coolant outlet pipe is connected to the cooling water tank. A filter is provided between the liquid recovery pipe and the cooling water tank, and the liquid in the liquid recovery pipe is filtered and discharged into the cooling water tank.

3. The oil-gas separator according to claim 1, characterized in that, The collection tank is equipped with a scraper that fits against the bottom of the outer tube. Both sides of the collection tank are equipped with guide plates to shield the scraper and prevent the mixture in the tank from directly contacting the scraper. A gap channel is formed between the guide plates and the outer tube.

4. An oil-gas separator according to claim 3, characterized in that, The tank is also equipped with a fixing frame, which includes a fixing shaft located inside the inner tube, a number of connecting rods between the fixing shaft and the inner tube, and a number of conductive rods located inside the fixing shaft and the connecting rods. The conductive rods located inside the fixing shaft pass through the side wall of the tank and are connected to the ground.

5. An oil-gas separator according to any one of claims 1, 3, or 4, characterized in that, The absorption tower includes: The tower body has an oil and gas inlet pipe connected to the bottom of its side wall, an absorbent feed pipe connected to the top of its side wall, a discharge pipe connected to the bottom of its bottom, and an air exhaust pipe connected to the top of its top. The guide assembly includes a fixed column vertically disposed within the tower body and spiral blades uniformly disposed on the fixed column. The ends of the spiral blades are attached to the inner wall of the tower body. The bottom of the fixed column is connected to the top of the discharge pipe, and the side wall of the fixed column is uniformly provided with a plurality of openings connecting the tower body and the discharge pipe. The bottom surface of the spiral blade is uniformly provided with bottom guide plates that are inclined upward along the spiral direction, and the top surface of the spiral blade is uniformly provided with a plurality of top guide plates that are inclined downward along the spiral direction.

6. An oil-gas separator according to claim 5, characterized in that, The top guide plate and the bottom guide plate are staggered, with the bottommost horizontal position of the top guide plate being lower than the topmost horizontal position of the adjacent bottom guide plate, and an interactive gap being formed between the top guide plate and the bottom guide plate.

7. An oil-gas separation method, characterized in that, This includes using the oil-gas separator according to any one of claims 1 to 6 to recover the oil and gas from the vehicle.

8. The oil-gas separation method according to claim 7, characterized in that, The steps for recovering vehicle-loaded oil and gas using the oil-gas separator according to any one of claims 1 to 6 are as follows: Step S001: Under a slight positive pressure, the oil and gas mixture enters the condensation and dehumidification tank through the gas outlet of the sealed cover of the tanker truck and the recovery pipe. The condensation pipe in the condensation and dehumidification tank condenses the water vapor in the oil and gas mixture, removing most of the water vapor in the oil and gas mixture. In step S002, the oil and gas mixture after removing water vapor enters the absorption tower, and at the same time, absorbent is introduced into the top of the absorption tower. The absorbent comes into countercurrent contact with the oil and gas mixture in the absorption tower. The absorbent selectively absorbs the hydrocarbon oil and gas, and the gas that is not absorbed by the absorbent is discharged through the flame arrester and completely treated by combustion. In step S003, the absorbent enters the vacuum desorption tank under the action of pressure difference, and the absorbed oil and gas are desorbed under vacuum conditions. The absorbent is regenerated in the vacuum desorption tank and then introduced into the absorption tower. In step S004, the desorbed oil and gas are cooled by a heat exchange tank and then stored in a storage tank.

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