Tank field oil gas recovery treatment system

Abstract

The utility model discloses a tank field oil gas recovery processing system which comprises an oil gas storage tank, an absorption tower connected with the oil gas storage tank, a buffer tank connected with the absorption tower, a precooler connected with the buffer tank, a primary condenser connected with the precooler and a secondary condenser connected with the primary condenser, the oil-water separation tank is connected with the precooler, the first-stage condenser and the second-stage condenser, the membrane separation tower is connected with the second-stage condenser, a gas outlet of the buffer tank is connected with an inlet of the precooler through a pipeline, a gas outlet of the precooler is connected with an inlet of the first-stage condenser through a pipeline, and a gas outlet of the second-stage condenser is connected with a gas outlet of the second-stage condenser through a pipeline. A gas outlet of the first-stage condenser is connected with an inlet of the second-stage condenser through a pipeline, liquid outlets of the precooler, the first-stage condenser and the second-stage condenser are all connected with the oil-water separation tank through pipelines, and a gas outlet of the second-stage condenser is connected with the membrane separation tower through a pipeline; the tank field oil gas recovery treatment system can effectively improve the oil product recovery rate and the recovery process safety.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas processing, in particular to an oil and gas recovery and processing system in a tank area. Background Art

[0002] The production, storage, transportation, and sales of organic chemical products all result in evaporation losses. During these processes, influenced by factors such as air pressure, temperature, and changes in the gas-liquid phase volume of the oil container, some organic vapors can enter the atmosphere, forming oil vapor. Because oil vapor has a greater relative density than air, it floats to the surface, exacerbating the impact on people and the surrounding environment. If the oil vapor content in the air reaches a certain concentration, it can easily cause a fire. Inhaling excessive, high-concentration oil vapor can cause acute or chronic poisoning, resulting in severe damage to the nervous, respiratory, central nervous, and even reproductive systems, and can even cause anesthesia, convulsions, and even death. Another hazard of oil vapor volatilization is the formation of photochemical smog. Furthermore, organic chemical materials are easily degraded by oil vapor, accelerating the corrosion of equipment. Therefore, oil vapor recovery plays a crucial role in energy conservation and emission reduction. In actual engineering applications, chemical storage tank areas often have high oil vapor concentrations and discontinuous emissions. Currently, adsorption is the primary method used to treat oil vapor in chemical storage tanks, with activated carbon being the predominant adsorbent. The activated carbon adsorption method has the following disadvantages: complex operation of the device, frequent switching, small adsorption capacity, limited use time of the adsorbent, long time to reach adsorption equilibrium, and difficulty in desorption. Moreover, because adsorption is an exothermic reaction, it may cause the bed temperature to overheat and spontaneously combust, posing a serious safety hazard. Utility Model Content

[0003] In view of this, the utility model provides a tank area oil and gas recovery and processing system to solve the above-mentioned problems.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A tank area oil and gas recovery and processing system includes an oil and gas storage tank, an absorption tower connected to the oil and gas storage tank, a buffer tank connected to the absorption tower, a precooler connected to the buffer tank, a primary condenser connected to the precooler, a secondary condenser connected to the primary condenser, an oil-water separation tank connected to the precooler, the primary condenser and the secondary condenser, and a membrane separation tower connected to the secondary condenser, the air outlet of the buffer tank is connected to the inlet of the precooler through a pipeline, the air outlet of the precooler is connected to the inlet of the primary condenser through a pipeline, the air outlet of the primary condenser is connected to the inlet of the secondary condenser through a pipeline, the liquid outlets of the precooler, the primary condenser and the secondary condenser are all connected to the oil-water separation tank through a pipeline, and the air outlet of the secondary condenser is connected to the membrane separation tower through a pipeline.

[0006] Furthermore, a delivery pipe is connected to the bottom of the side wall of the oil and gas storage tank, one end of the delivery pipe is connected to the absorption tower, and a compressor is connected to the delivery pipe.

[0007] Furthermore, an oil and gas inlet is opened in the middle of the side wall of the absorption tower, one end of the delivery pipe is connected to the oil and gas inlet, and an oil and gas outlet and a drain port are respectively opened at the top and bottom of the side wall of the absorption tower opposite to the oil and gas inlet. The oil and gas inlet, oil and gas outlet and drain port are all connected to the interior of the absorption tower. A connecting pipe is connected to the oil and gas outlet, and a delivery pump is provided on the connecting pipe. One end of the connecting pipe is connected to the buffer tank.

[0008] Furthermore, a spray assembly is installed in the middle of the interior of the absorption tower, a liquid collection pool is provided below the spray assembly, the liquid collection pool is located at the bottom of the absorption tower, a wire mesh demister is provided above the spray assembly, and the spray assembly and the wire mesh demister are both provided below the oil and gas outlet.

[0009] Furthermore, the spray assembly includes a mounting frame installed on the inner side wall of the absorption tower and a spray head installed at the bottom of the mounting frame.

[0010] Furthermore, a connecting port is provided at the bottom of the side wall of the liquid collecting tank, and the connecting port is connected to the liquid drain port.

[0011] Furthermore, an air inlet is provided at the bottom of the side wall of the membrane separation tower, and an exhaust port is provided on the top wall of the membrane separation tower. Both the air inlet and the exhaust port are communicated with the interior of the membrane separation tower.

[0012] Furthermore, a plurality of membrane modules are evenly installed inside the membrane separation tower, and an adsorption filler layer is filled between every two membrane modules.

[0013] Furthermore, the membrane assembly includes a fixing frame installed on the inner side wall of the membrane separation tower, a gas distribution plate installed in the fixing frame, and an oil-gas separation membrane attached to the gas distribution plate, and the gas distribution plate is evenly provided with multiple ventilation holes.

[0014] The beneficial effects of the utility model are:

[0015] The oil and gas recovery and processing system in the tank area provided by the utility model comprises an oil and gas storage tank for storing oil and gas, an absorption tower connected to the oil and gas storage tank through a pipeline for absorbing part of the light component oil phase in the oil and gas, a buffer tank connected to the absorption tower through a pipeline for buffering the oil and gas pressure fluctuation, a precooler connected to the buffer tank through a pipeline for precooling the oil and gas after absorption treatment, a first-level condenser connected to the precooler through a pipeline for primary condensation of the precooled oil and gas, a second-level condenser connected to the first-level condenser through a pipeline for secondary condensation of the primary condensed oil and gas, an oil-water separation tank connected to the precooler, the first-level condenser and the second-level condenser through a pipeline for collecting condensate and oil products and performing separation treatment, and a membrane separation tower connected to the second-level condenser through a pipeline for filtering and adsorbing the gas after the secondary condensation; the air outlet of the buffer tank is connected to the inlet of the precooler through a pipeline, and the air outlet of the precooler is connected to the inlet of the precooler through a pipeline. The inlet of the first-stage condenser is connected through a pipeline, the air outlet of the first-stage condenser is connected to the inlet of the second-stage condenser through a pipeline, the liquid outlets of the precooler, the first-stage condenser and the second-stage condenser are all connected to the oil-water separation tank through a pipeline, and the air outlet of the second-stage condenser is connected to the membrane separation tower through a pipeline. The oil and gas after absorption treatment enter the precooler through the buffer tank, where most of the water vapor is condensed into water and separated. The condensed oil and gas enter the first-stage condenser and the second-stage condenser in turn, so that most of the oil vapor is condensed into liquid and recovered. The oil-water mixture obtained after condensation enters the oil-water separator for oil-water separation, thereby collecting the recovered oil products. The oil and gas after condensation treatment are transported to the membrane separation tower for membrane separation treatment. The oil and gas undergo solvent absorption, condensation and membrane separation treatment in turn, which can effectively recover the oil products in the oil and gas, improve the recovery rate of the oil products in the oil and gas and the safety of the recovery process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a front view of the oil and gas recovery and processing system for the tank area of the utility model;

[0018] Figure 2 for Figure 1 A cross-sectional view of an absorption tower in the tank area oil and gas recovery and processing system of the present invention is shown;

[0019] Figure 3 for Figure 1 The figure shows a cross-sectional view of a membrane separation tower in the tank area oil and gas recovery and processing system of the present invention.

[0020] In the figure: 100, tank area oil and gas recovery and processing system, 1, oil and gas storage tank, 11, delivery pipe, 12, compressor, 2, absorption tower, 21, oil and gas inlet, 22, oil and gas outlet, 221, connecting pipe, 222, delivery pump, 23, drain port, 24, spray assembly, 241, mounting frame, 242, spray head, 25, liquid collecting tank, 26, wire mesh demister, 3, buffer tank, 4, precooler, 5, primary condenser, 6, secondary condenser, 7, oil-water separation tank, 8, membrane separation tower, 81, air inlet, 82, exhaust port, 83, membrane assembly, 831, fixing frame, 832, gas uniform distribution plate, 8321, air vent, 833, oil and gas separation membrane, 84, adsorption filler layer. DETAILED DESCRIPTION

[0021] The present invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0022] like Figure 1 As shown, the utility model provides a tank area oil and gas recovery and processing system 100, which is used to treat the oil and gas generated in the tank area during the production, storage and transportation of organic chemical products. The tank area oil and gas recovery and processing system 100 of the utility model includes an oil and gas storage tank 1 for storing oil and gas, an absorption tower 2 connected to the oil and gas storage tank 1 for absorbing part of the light component oil phase in the oil and gas, a buffer tank 3 connected to the absorption tower 2 for buffering the oil and gas pressure fluctuation, a precooler 4 connected to the buffer tank 3 for precooling the oil and gas after absorption treatment, a first-level condenser 5 connected to the precooler 4 for primary condensation of the precooled oil and gas, a second-level condenser 6 connected to the first-level condenser 5 for secondary condensation of the first-level condensed oil and gas, an oil-water separation tank 7 connected to the precooler 4, the first-level condenser 5 and the second-level condenser 6 for collecting condensate and oil products and separating them, and a membrane separation tower 8 connected to the second-level condenser 6 for filtering and adsorbing the gas after the second condensation.

[0023] like Figure 1 As shown, a delivery pipe 11 for delivering oil and gas is connected to the bottom of the side wall of the oil and gas storage tank 1, one end of the delivery pipe 11 is connected to the absorption tower 2, and a compressor 12 for compressing the oil and gas is connected to the delivery pipe 11. The oil and gas in the oil and gas storage tank 1 are compressed by the compressor 12 and then delivered to the absorption tower 2 through the delivery pipe 11 for absorption treatment.

[0024] like Figure 1 and Figure 2As shown, an oil and gas inlet 21 for introducing oil and gas into the absorption tower 2 is provided in the middle of the side wall of the absorption tower 2, one end of the delivery pipe 11 is connected to the oil and gas inlet 21, and an oil and gas outlet 22 and a drain port 23 are respectively provided at the top and bottom of the side wall of the absorption tower 2 opposite to the oil and gas inlet 21. The oil and gas inlet 21, the oil and gas outlet 22 and the drain port 23 are all connected to the interior of the absorption tower 2, and the oil and gas outlet 22 is connected to a connecting pipe 221 for discharging the absorbed oil and gas, and a delivery pump 222 is provided on the connecting pipe 221, and one end of the connecting pipe 221 is connected to the buffer tank 3; a spray assembly 24 for spraying the absorption solvent is installed in the middle of the interior of the absorption tower 2, and the spray assembly 24 includes a mounting frame 241 installed on the inner side wall of the absorption tower 2 and a spray head 242 installed at the bottom of the mounting frame 241, and a liquid collecting pool 25 for collecting the solution is provided below the spray assembly 24, and the liquid collecting pool 25 is located at the absorption A connection port (not shown) communicating with the drain port 23 is provided at the bottom of the collecting tower 2 and the bottom of the side wall of the liquid collecting tank 25. A wire mesh demister 26 for removing floating foam in the oil and gas is provided above the spray assembly 24. The spray assembly 24 and the wire mesh demister 26 are both arranged below the oil and gas outlet 22. After the oil and gas enter the absorption tower 2 through the oil and gas inlet 21, the spray head 242 on the spray assembly 24 sprays a solvent for absorbing organic matter in the oil and gas. The solvent and the oil and gas form convection and fully contact, thereby absorbing part of the organic matter in the oil and gas. The absorbed oil and gas flow upward and pass through the wire mesh demister 26 to remove floating foam, and then are discharged through the oil and gas outlet 22 and are transported to the buffer tank 3 through the connecting pipe 221 under the action of the delivery pump 222 to buffer pressure fluctuations, so as to facilitate subsequent condensation treatment. The solution formed by absorbing the organic matter enters the liquid collecting tank 25 under the action of gravity and is collected and then discharged through the drain port 23 for recycling.

[0025] like Figure 1 As shown, the air outlet of the buffer tank 3 is connected to the inlet of the precooler 4 through a pipeline, the air outlet of the precooler 4 is connected to the inlet of the first-stage condenser 5 through a pipeline, the air outlet of the first-stage condenser 5 is connected to the inlet of the second-stage condenser 6 through a pipeline, the liquid outlets of the precooler 4, the first-stage condenser 5 and the second-stage condenser 6 are all connected to the oil-water separation tank 7 through a pipeline, and the air outlet of the second-stage condenser 6 is connected to the membrane separation tower 8 through a pipeline. The oil and gas after absorption treatment enter the precooler 4 through the buffer tank 3, wherein most of the water vapor is condensed into water and separated, and the condensed oil and gas enter the first-stage condenser 5 and the second-stage condenser 6 in turn, so that most of the oil vapor is condensed into liquid and recovered, and the oil-water mixture obtained after condensation enters the oil-water separator 7 for oil-water separation, thereby collecting the recovered oil product, and the oil and gas after condensation treatment are transported to the membrane separation tower 8 for membrane separation treatment.

[0026] like Figure 1 and Figure 3As shown, an air inlet 81 for conveying the oil and gas after condensation treatment is provided at the bottom of the side wall of the membrane separation tower 8, an exhaust port 82 for exhausting air is provided on the top wall of the membrane separation tower 8, and a plurality of membrane modules 83 for membrane separation treatment of the oil and gas after condensation treatment are evenly installed inside the membrane separation tower 8, and an adsorption filler layer 84 for adsorbing the oil and gas is filled between each two membrane modules 83; the membrane module 83 includes a fixing frame 831 installed on the inner side wall of the membrane separation tower 8, a gas distribution plate 832 installed in the fixing frame 831 for evenly distributing the oil and gas, and a gas distribution plate 832 for evenly distributing the oil and gas. And the oil-gas separation membrane 833 attached to the gas uniform distribution plate 832, the gas uniform distribution plate 832 is evenly provided with a plurality of air vents 8321 for the passage of oil and gas; the oil and gas entering the membrane separation tower 8 come into contact with the oil-gas separation membrane 833 after passing through the air vents 8321 on the gas uniform distribution plate 832, and the air preferentially passes through the oil-gas separation membrane 833 to become clean air free of oil and gas, while the oil products are selectively retained, and the oil products retained on one side of the oil-gas separation membrane 833 are adsorbed by the adsorption filler layer 84 after passing through the oil-gas separation membrane 833 to achieve enrichment and recovery.

[0027] When treating oil and gas, the oil and gas in the oil and gas storage tank 1 are compressed by the compressor 12 and then transported to the absorption tower 2 through the delivery pipe 11. The spray head 242 on the spray assembly 24 sprays a solvent for absorbing organic matter in the oil and gas. The solvent forms convection with the oil and gas and fully contacts, thereby absorbing and treating part of the organic matter in the oil and gas. The absorbed oil and gas flow upward and pass through the wire mesh demister 26 to remove the floating foam and then are discharged through the oil and gas outlet 22 and are transported to the buffer tank 3 through the connecting pipe 221 under the action of the delivery pump 222 to buffer the pressure fluctuation. The solution formed by absorbing the organic matter enters the liquid collecting pool 25 under the action of gravity and is collected and then discharged through the drain port 23 for recycling. The absorbed oil and gas enter the precooler 4 through the buffer tank 3, and most of the water vapor is condensed into water and is After separation, the condensed oil and gas enter the primary condenser 5 and the secondary condenser 6 in turn, so that most of the oil vapor is condensed into liquid for recovery. The oil-water mixture obtained after condensation enters the oil-water separator 7 for oil-water separation, thereby collecting the recovered oil products. The condensed oil and gas are transported to the membrane separation tower 8. The oil and gas entering the membrane separation tower 8 pass through the air vents 8321 on the gas distribution plate 832 and contact the oil and gas separation membrane 833. The air preferentially passes through the oil and gas separation membrane 833 and becomes clean air removed from the oil and gas and is discharged from the exhaust port 82, while the oil products are selectively retained. The oil products retained on one side of the oil and gas separation membrane 833 are adsorbed by the adsorption filler layer 84 after passing through the oil and gas separation membrane 833 to achieve enrichment and recovery.

[0028] The oil and gas recovery and processing system 100 in the tank area provided by the utility model comprises an oil and gas storage tank 1 for storing oil and gas, an absorption tower 2 connected to the oil and gas storage tank 1 through a pipeline for absorbing part of the light component oil phase in the oil and gas, a buffer tank 3 connected to the absorption tower 2 through a pipeline for buffering the pressure fluctuation of the oil and gas, a precooler 4 connected to the buffer tank 3 through a pipeline for precooling the oil and gas after the absorption treatment, a first-level condenser 5 connected to the precooler 4 through a pipeline for performing a primary condensation on the precooled oil and gas, a second-level condenser 6 connected to the first-level condenser 5 through a pipeline for performing a secondary condensation on the first-condensed oil and gas, an oil-water separation tank 7 connected to the precooler 4, the first-level condenser 5 and the second-level condenser 6 through a pipeline for collecting condensate and oil products and performing separation treatment, and a membrane separation tower 8 connected to the second-level condenser 6 through a pipeline for filtering and adsorbing the gas after the secondary condensation; the gas outlet of the buffer tank 3 is connected to the inlet of the precooler 4 through a pipeline, and the precooler 4 The air outlet is connected to the inlet of the first-stage condenser 5 through a pipeline, the air outlet of the first-stage condenser 5 is connected to the inlet of the second-stage condenser 6 through a pipeline, the liquid outlets of the precooler 4, the first-stage condenser 5 and the second-stage condenser 6 are all connected to the oil-water separation tank 7 through a pipeline, and the air outlet of the second-stage condenser 6 is connected to the membrane separation tower 8 through a pipeline. The oil and gas after absorption treatment enter the precooler 4 through the buffer tank 3, wherein most of the water vapor is condensed into water and separated. The condensed oil and gas enter the first-stage condenser 5 and the second-stage condenser 6 in turn, so that most of the oil vapor is condensed into liquid and recovered. The oil-water mixture obtained after condensation enters the oil-water separator 7 for oil-water separation, thereby collecting the recovered oil products. The oil and gas after condensation treatment are transported to the membrane separation tower 8 for membrane separation treatment. The oil and gas undergo solvent absorption, condensation and membrane separation treatment in turn, which can effectively recover the oil products in the oil and gas, improve the recovery rate of the oil products in the oil and gas and the safety of the recovery process.

[0029] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the scope of the present invention. The technical scope of this utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A tank area oil and gas recovery and processing system, characterized in that: It includes an oil and gas storage tank, an absorption tower connected to the oil and gas storage tank, a buffer tank connected to the absorption tower, a precooler connected to the buffer tank, a first-level condenser connected to the precooler, a second-level condenser connected to the first-level condenser, an oil-water separation tank connected to the precooler, the first-level condenser and the second-level condenser, and a membrane separation tower connected to the second-level condenser, the air outlet of the buffer tank is connected to the inlet of the precooler through a pipeline, the air outlet of the precooler is connected to the inlet of the first-level condenser through a pipeline, the air outlet of the first-level condenser is connected to the inlet of the second-level condenser through a pipeline, the liquid outlets of the precooler, the first-level condenser and the second-level condenser are all connected to the oil-water separation tank through a pipeline, and the air outlet of the second-level condenser is connected to the membrane separation tower through a pipeline.

2. The tank area oil and gas recovery and processing system according to claim 1 is characterized in that: A delivery pipe is connected to the bottom of the side wall of the oil and gas storage tank, one end of the delivery pipe is connected to the absorption tower, and a compressor is connected to the delivery pipe.

3. The tank area oil and gas recovery and processing system according to claim 2 is characterized in that: An oil and gas inlet is provided in the middle of the side wall of the absorption tower, one end of the delivery pipe is connected to the oil and gas inlet, and an oil and gas outlet and a drain port are respectively provided at the top and bottom of the side wall of the absorption tower opposite to the oil and gas inlet. The oil and gas inlet, the oil and gas outlet and the drain port are all connected to the interior of the absorption tower, a connecting pipe is connected to the oil and gas outlet, a delivery pump is provided on the connecting pipe, and one end of the connecting pipe is connected to the buffer tank.

4. The tank area oil and gas recovery and processing system according to claim 3 is characterized in that: A spray assembly is installed in the middle of the interior of the absorption tower, a liquid collection pool is provided below the spray assembly, the liquid collection pool is located at the bottom of the absorption tower, a wire mesh demister is provided above the spray assembly, and the spray assembly and the wire mesh demister are both provided below the oil and gas outlet.

5. The tank area oil and gas recovery and processing system according to claim 4 is characterized in that: The spray assembly comprises a mounting frame mounted on the inner side wall of the absorption tower and a spray head mounted at the bottom of the mounting frame.

6. The tank area oil and gas recovery and processing system according to claim 4 is characterized in that: A connecting port is provided at the bottom of the side wall of the liquid collecting tank, and the connecting port is communicated with the liquid discharge port.

7. The tank area oil and gas recovery and processing system according to claim 1 is characterized in that: An air inlet is provided at the bottom of the side wall of the membrane separation tower, and an exhaust port is provided on the top wall of the membrane separation tower. Both the air inlet and the exhaust port are communicated with the interior of the membrane separation tower.

8. The tank area oil and gas recovery and processing system according to claim 1 is characterized in that: A plurality of membrane modules are evenly installed inside the membrane separation tower, and an adsorption filler layer is filled between every two membrane modules.

9. The tank area oil and gas recovery and processing system according to claim 8, characterized in that: The membrane assembly includes a fixing frame installed on the inner side wall of the membrane separation tower, a gas distribution plate installed in the fixing frame, and an oil-gas separation membrane attached to the gas distribution plate, wherein a plurality of vents are evenly opened on the gas distribution plate.

Images