Oil gas compression, collection and treatment device

Abstract

The utility model relates to the technical field of navigation transportation, in particular to an oil gas compressing, collecting and processing device which comprises a temporary storage tank used for storing mixed oil gas, a feeding pipeline is connected to the top of the temporary storage tank, a discharging pipeline is arranged at the bottom of the temporary storage tank, and a first separator is connected to the discharging pipeline. The upper part of the first separator is connected with a natural gas compression and collection system through a pipeline, the bottom of the first separator is connected with a crude oil storage and collection system through a pipeline, and the natural gas compression and collection system and the crude oil storage and collection system are connected with the oil-gas treatment system. Mixed oil gas is separated through the first separator and then enters the natural gas compression and collection system and the crude oil storage and collection system for further reaction and then is output, residues in the natural gas compression and collection system and the crude oil storage and collection system further participate in oil gas separation through the oil gas treatment system, and the emission concentration is low; and the energy-saving and low-carbon effects are obvious.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas recovery, in particular to an oil and gas compression, collection and processing device. Background Art

[0002] Natural gas and oil are usually mixed together when stored underground, but they have different uses and market demands. Natural gas and oil are usually used in different industrial processes, and in many cases, they need to be supplied in pure form. Therefore, separation of crude oil and natural gas can meet the needs of various industrial production. Natural gas and oil are transported and stored in different ways. Oil is usually transported in liquid form through pipelines, ships or railways, while natural gas is usually transported in gaseous form through pipelines or liquefied natural gas (LNG) ships. Therefore, separation of natural gas and oil can better meet their different transportation and storage requirements.

[0003] However, in the process of separating natural gas and oil, there is no simple production system to separate natural gas and oil. In the process of separation, the residual oil and gas produced cannot be recycled and reused, but are directly discharged into the external environment, causing waste of resources and environmental pollution.

[0004] When an emergency occurs in the system, the pressure, liquid or gas cannot be quickly discharged, and the system pressure cannot be effectively reduced. The possibility of accidents is high and the safety of the workplace is poor. Protect system equipment from damage caused by excessive pressure or other abnormal conditions, impact and damage to equipment, and extend the service life of equipment. Summary of the invention

[0005] The utility model provides an oil and gas compression collection and processing device to solve the problems raised in the above-mentioned background technology. The utility model separates the mixed oil and gas through a first separator, and after separation, the mixed oil and gas enter the natural gas compression collection system and the crude oil storage collection system respectively for further reaction and then output. The residue in the natural gas compression collection system and the crude oil storage collection system is further separated by the oil and gas processing system, and has the advantages of low emission concentration and significant energy saving and low carbon effect.

[0006] The utility model adopts the following technical scheme: an oil and gas compression collection and processing device, comprising a temporary storage tank for storing mixed oil and gas, a feed pipeline connected to the top of the temporary storage tank, a discharge pipeline provided at the bottom of the temporary storage tank, a first separator connected to the discharge pipeline, a natural gas compression collection system connected to the upper part of the first separator through a pipeline, a crude oil storage and collection system connected to the bottom of the first separator through a pipeline, and both the natural gas compression collection system and the crude oil storage and collection system are connected to the oil and gas processing system. Natural gas is a relatively clean fuel, and produces less pollution after combustion. Through compression and collection technology, the release and utilization of natural gas can be more effectively controlled, and the emission of greenhouse gases and other pollutants can be reduced. During the natural gas compression and collection process, the gas can be controlled and monitored to ensure safe operation. Compared with traditional natural gas extraction methods, compression and collection technology can reduce accidents and safety hazards. And the compressed and collected natural gas can be used in power generation, industrial production, transportation and other fields.

[0007] Preferably, the natural gas compression and collection system includes a compressor unit for performing gas pressure boosting processing, a cooler for cooling the pressurized and heated gas, and a balancing tank for buffering the compressed gas, the inlet end of the compressor unit is connected to the outlet end of the first separator, the outlet end of the compressor unit is connected to the inlet end of the cooler, the outlet end of the cooler is connected to the inlet end of the balancing tank, and the outlet end of the balancing tank is externally connected to a subsequent terminal processing unit.

[0008] Preferably, there is a pipeline flame arrester on the outlet pipeline of the balance tank, and the pipeline flame arrester is connected to the terminal processing unit, and the terminal processing unit includes an external transmission pipeline network, a plant flare system and an oxidation furnace unit.

[0009] Preferably, a sewage outlet is provided at the bottom of the balancing tank, the sewage outlet is connected to the oil and gas processing system, and a liquid level meter is provided on the tank body of the balancing tank.

[0010] Preferably, the compressor unit is a water screw compressor, which has the advantages of high efficiency and energy saving, low noise, high reliability, strong adaptability, simple maintenance, environmental protection and energy saving.

[0011] Preferably, the crude oil storage and collection system includes a crude oil storage tank for temporarily storing crude oil and a desulfurization tower, the inlet end of the crude oil storage tank is connected to the outlet end of the first separator, the outlet end of the crude oil storage tank is connected to the inlet end of the desulfurization tower, and a sewage outlet is provided at the bottom of the desulfurization tower, which is connected to the oil and gas processing system. The desulfurization tower is used to purify various pollutants in the flue gas and improve the purification effect.

[0012] Preferably, the first separator, the balance tank, and the top of the desulfurization tower are all provided with an exhaust port, and an exhaust branch is provided on the exhaust port, and the exhaust branch is connected to the emergency emptying pipeline after being connected in parallel. Connecting to the emergency emptying pipeline, quickly discharging pressure, liquid or gas in an emergency helps to reduce system pressure and reduce the possibility of accidents, thereby improving workplace safety. Protect system equipment from damage caused by excessive pressure or other abnormal conditions. By emptying in time, the impact and damage to the equipment can be reduced, and the service life of the equipment can be extended. Reduce pollution and impact on the environment, and protect the ecological environment and human health.

[0013] Preferably, the oil and gas processing system includes a first adsorption tower, a membrane system and a second adsorption tower, the inlet end of the first adsorption tower is connected to the discharge outlets of the balance tank and the desulfurization tower respectively through a discharge pipeline, an oil and gas compressor is arranged on the discharge pipeline, the outlet end of the first adsorption tower is connected to the inlet end of the membrane system, the outlet end of the membrane system is connected to the inlet end of the second adsorption tower, an exhaust port is arranged on the top of the second adsorption tower, an exhaust pipe is arranged at the exhaust port, an exhaust valve is arranged on the exhaust pipe, the first adsorption tower is also connected to the lean oil system, the lean oil system includes a lean oil pump and a heat exchanger, the outlet end of the lean oil pump is connected to the outlet end of the heat exchanger, the outlet end of the heat exchanger is connected to the inlet end of the absorption tower, a circulation pipeline is connected in parallel to the inlet end of the second adsorption tower, the circulation pipeline is connected to the discharge pipeline at the inlet end of the oil and gas compressor, and a vacuum pump is arranged on the circulation pipeline.

[0014] The oil and gas processing system can save energy resources and improve energy efficiency by recycling useful components in residual oil and gas, such as extracting liquefied petroleum gas (LPG) or refining gasoline, diesel and other fuels. It can further remove harmful substances such as sulfides and oxides in residual oil and gas, reduce pollutants such as sulfur oxides and nitrogen oxides in combustion emissions, reduce the impact on the environment, and meet environmental protection requirements. In addition, the oil and gas processing system can be operated automatically to process oil and gas efficiently and continuously, improve production efficiency, reduce labor costs and production cycles, and enhance corporate competitiveness. It can also be adjusted and optimized according to different oil and gas components and production requirements, and has certain adaptability and flexibility.

[0015] The beneficial effects of the utility model are as follows: the utility model separates the mixed oil and gas through the first separator, and after separation, the mixed oil and gas enter the natural gas compression and collection system and the crude oil storage and collection system respectively for further reaction and then output; the residue in the natural gas compression and collection system and the crude oil storage and collection system is further separated by the oil and gas processing system, and has the advantages of low emission concentration and significant energy saving and low carbon effect.

[0016] (1) Natural gas compression and collection technology can more effectively control the release and utilization of natural gas and reduce the emission of greenhouse gases and other pollutants. During the natural gas compression and collection process, the gas can be controlled and monitored to ensure safe operation. Compared with traditional natural gas extraction methods, compression and collection technology can reduce accidents and safety hazards. And compressed and collected natural gas can be used in power generation, industrial production, transportation and other fields.

[0017] (2) There is also a pipeline flame arrester on the outlet pipeline of the balance tank, and the pipeline flame arrester is connected to the terminal processing unit. The terminal processing unit includes an external transmission pipeline network, a plant flare system and an oxidation furnace unit.

[0018] (3) The use of water screw compressors has the advantages of high efficiency and energy saving, low noise, high reliability, strong adaptability, easy maintenance, and environmental protection and energy saving.

[0019] (4) The desulfurization tower is used to purify various pollutants in the flue gas and improve the purification effect.

[0020] (5) Protect system equipment from damage caused by excessive pressure or other abnormal conditions. By emptying the system in time, the impact and damage to the equipment can be reduced, and the service life of the equipment can be extended. It can also reduce pollution and impact on the environment, and protect the ecological environment and human health.

[0021] (6) The oil and gas processing system can save energy resources and improve energy efficiency by recycling useful components in residual oil and gas, such as extracting liquefied petroleum gas (LPG) or refining gasoline, diesel and other fuels. It can further remove harmful substances such as sulfides and oxides in residual oil and gas, reduce pollutants such as sulfur oxides and nitrogen oxides in combustion emissions, reduce the impact on the environment, and meet environmental protection requirements. In addition, the oil and gas processing system can be operated automatically to process oil and gas efficiently and continuously, improve production efficiency, reduce labor costs and production cycles, and enhance corporate competitiveness. It can also be adjusted and optimized according to different oil and gas components and production requirements, and has a certain degree of adaptability and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the system principle of the utility model.

[0024] In the figure: 1-temporary storage tank, 101-feed pipeline, 102-discharge pipeline, 2-first separator, 3-exhaust branch, 301-emergency emptying pipeline, 4-compressor unit, 401-cooler, 402-balance tank, 421-pipeline flame arrester, 422-oxidation furnace unit, 423-plant flare system, 424-external transmission pipeline, 5-crude oil storage tank, 6-desulfurization tower, 7-first adsorption tower, 701-lean oil pump, 702-heat exchanger, 703-oil and gas compressor, 8-membrane system, 9-second adsorption tower, 901-exhaust pipeline, 911-exhaust valve, 10-vacuum pump. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] An embodiment of an oil and gas compression collection and processing device of the utility model is as follows Figure 1 As shown;

[0028] An oil and gas compression collection and processing device includes a temporary storage tank 1 for storing mixed oil and gas, a feed pipeline 101 is connected to the top of the temporary storage tank, a discharge pipeline 102 is provided at the bottom of the temporary storage tank, and a first separator 2 is connected to the discharge pipeline. The mixed oil and gas are separated by the first separator to obtain crude oil or various liquid petroleum products, and natural gas.

[0029] The upper part of the first separator is connected to a natural gas compression and collection system through a pipeline, and the natural gas enters the natural gas compression and collection system. The natural gas compression and collection system includes a compressor unit 4 for gas pressure boosting, a cooler 401 for cooling the pressurized and heated gas, and a balance tank 402 for buffering the compressed gas. The compressor unit is a water screw compressor. The water screw compressor directly increases the operating pressure of the device system to 7 bar (G). In addition, a pressure transmitter, a temperature transmitter, etc. can also be set on the outlet pipeline of the compressor unit 5.

[0030] The inlet of the compressor unit is connected to the outlet of the first separator, the outlet of the compressor unit is connected to the inlet of the cooler, and the outlet of the cooler is connected to the inlet of the balance tank. Natural gas enters the compressor unit to increase the pressure of natural gas, then enters the cooler to cool down, and the cooled natural gas enters the balance tank for buffering.

[0031] The temperature and pressure in the balancing tank are cooled to below the critical point of the natural gas, which will then be liquefied into liquefied natural gas (LNG) in the tank. LNG is a form of natural gas liquefied at low temperatures (usually about minus 162 degrees Celsius). Liquid natural gas has a higher density and storage efficiency and is used for long-distance transportation and storage.

[0032] The bottom of the balancing tank is provided with a sewage outlet, which is connected to the oil and gas processing system, and the tank body of the balancing tank is provided with a liquid level gauge, which monitors the liquid level status in the balancing tank in real time.

[0033] The outlet of the balance tank is externally connected to a subsequent terminal processing unit. There is also a pipeline flame arrester 421 on the outlet pipeline of the balance tank. When a fire occurs in the pipeline, the flame arrester quickly closes the pipeline, blocks the flame propagation path, prevents the flame from spreading in the pipeline, and avoids explosion. The pipeline flame arrester is connected to the terminal processing unit, which includes an external transmission pipeline network 424, a plant flare system 423, and an oxidation furnace unit 422.

[0034] Liquid natural gas1 can be transported through external transmission pipelines to residential and commercial terminals for heating, cooking and hot water supply, and can be transported over long distances by container ships and used for power generation or transportation, etc.

[0035] The core component of the plant's flare system 423 is the flare unit, which consists of a tall vertical pipe with a flame burner on top. When the plant needs to relieve excessive pressure or treat waste gas, the flare unit ignites the waste gas and burns it, converting the harmful gases into carbon dioxide and water vapor.

[0036] The oxidation furnace unit 422 includes a furnace, a heating system for heating the furnace, a feeding device, a gas circulation system and an exhaust system. Liquid natural gas is introduced into the furnace through the feeding device for oxidation reaction.

[0037] The bottom of the first separator 2 is connected to a crude oil storage and collection system through a pipeline, and the crude oil storage and collection system includes a crude oil storage tank 5 and a desulfurization tower 6 for temporarily storing crude oil. The inlet end of the crude oil storage tank is connected to the outlet end of the first separator, and the outlet end of the crude oil storage tank is connected to the inlet end of the desulfurization tower. The crude oil is desulfurized by the desulfurization tower to obtain low-sulfur crude oil or ultra-low-sulfur crude oil, and the sulfur content of the low-sulfur crude oil or ultra-low-sulfur crude oil is low. The low-sulfur crude oil or ultra-low-sulfur crude oil is finally transported to the external transmission pipeline network for use by downstream terminals.

[0038] The natural gas compression and collection system and the crude oil storage and collection system are both connected to the oil and gas processing system; a sewage outlet is provided at the bottom of the desulfurization tower, and the sewage outlet is connected to the oil and gas processing system.

[0039] The oil and gas processing system includes a first adsorption tower 7, a membrane system 8 and a second adsorption tower 9. The inlet end of the first adsorption tower is connected to the sewage outlets of the balance tank and the desulfurization tower through sewage pipelines, and an oil and gas compressor 703 is provided on the sewage pipeline. The outlet end of the first adsorption tower is connected to the inlet end of the membrane system, and the outlet end of the membrane system is connected to the inlet end of the second adsorption tower. The oil and gas processing system can save energy resources and improve energy utilization efficiency by recycling useful components in residual oil and gas, such as extracting liquefied petroleum gas (LPG) or refining gasoline, diesel and other fuels.

[0040] The first adsorption tower 7 is also connected to the lean oil system, which includes a lean oil pump 701 and a heat exchanger 702. The outlet of the lean oil pump is connected to the outlet of the heat exchanger, and the outlet of the heat exchanger is connected to the inlet of the absorption tower. A circulation pipeline is connected in parallel to the inlet of the second adsorption tower, and the circulation pipeline is connected to the sewage pipeline at the inlet of the oil and gas compressor. A vacuum pump 10 is provided on the circulation pipeline.

[0041] The residual oil and gas first enter the oil and gas compressor, and after the compressor increases the pressure to the operating pressure of 0.7-0.75MPa, it enters the first adsorption tower, and in the first adsorption tower, it countercurrently contacts with the lean oil absorbent sprayed from the lean liquid pump on the top of the first adsorption tower to absorb the oil and gas mixed gas. The rich oil gathers at the bottom of the first adsorption tower, and is discharged to the oil storage tank by the rich liquid pump or its own pressure after reaching a certain oil level. The unabsorbed mixed gas enters the membrane system 8 and is separated under the action of gas pressure. The membrane separator in the membrane system divides the mixed gas into residual gas containing very small amounts of hydrocarbons and permeate gas rich in hydrocarbons. The permeate gas rich in hydrocarbons returns to the inlet of the oil and gas compressor for cyclic cascade treatment, and the residual gas containing very small amounts of hydrocarbons enters the subsequent second adsorption tower for further treatment.

[0042] The concentration of the residual gas after membrane separation and purification is less than 0.5% (vol), and deep purification treatment is carried out to make the various organic substances discharged meet the national emission standards (≤120mg / m3).

[0043] The first adsorption tower 7 and the second adsorption tower 9 are filled with special activated carbon adsorbents. The oil and gas enter the adsorption tower from the inlet valve at the lower end of the adsorption tower, pass through the activated carbon on the bed, and are discharged into the atmosphere through the vent valve at the top of the adsorption tower. In this process, hydrocarbons are adsorbed by the activated carbon, thereby achieving the purpose of purification.

[0044] When the first adsorption tower 7 is close to saturation, the pressure of its activated carbon bed is reduced, and the high-concentration hydrocarbons are separated from the pore structure of the activated carbon through a vacuum pump, and re-enter the oil and gas compressor inlet for recycling. Then it enters the membrane system, and the residual pressure of the non-condensable gas is used as the separation power of the separation membrane assembly. The separation membrane has different permeation rates for different gases, and the organic gas and water in the non-condensable gas pass through the membrane more preferentially than air, so that the gas after passing through the membrane assembly reduces the oil and gas concentration and removes water before entering the second adsorption tower.

[0045] The oil and gas treatment system uses the principle of pressure swing adsorption to make the remaining low-concentration oil and gas mixture undergo deep adsorption treatment with special activated carbon, remove harmful substances such as sulfides and oxides in the residual oil and gas, reduce pollutants such as sulfur oxides and nitrogen oxides in combustion emissions, and reduce the impact on the environment. The tail gas meets the national emission standards for discharge. The second adsorption tower 9 is provided with an exhaust port at the top of the tower, and an exhaust pipeline 901 is provided at the exhaust port. The exhaust pipeline is provided with an exhaust valve 911. When the exhaust valve is opened, the tail gas is discharged along the exhaust pipe.

[0046] Example 2

[0047] In this embodiment, the first separator 2, the balance tank 402, and the top of the desulfurization tower 6 are all provided with exhaust ports, and exhaust branches are provided on the exhaust ports. The exhaust branches are connected in parallel to the emergency emptying pipeline 301. When connected to the emergency emptying pipeline, pressure, liquid or gas can be quickly discharged in an emergency to reduce system pressure, protect system equipment from damage caused by excessive pressure or other abnormal conditions, and empty in time to reduce impact and damage to the equipment.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil and gas compression, collection and processing device, characterized in that: The invention comprises a temporary storage tank (1) for storing mixed oil and gas, wherein the top of the temporary storage tank is connected to a feed pipeline (101), the bottom of the temporary storage tank is provided with a discharge pipeline (102), the discharge pipeline is connected to a first separator (2), the top of the first separator is connected to a natural gas compression and collection system via a pipeline, the bottom of the first separator is connected to a crude oil storage and collection system via a pipeline, and both the natural gas compression and collection system and the crude oil storage and collection system are connected to an oil and gas processing system.

2. The oil and gas compression collection and processing device according to claim 1 is characterized in that: The natural gas compression and collection system comprises a compressor unit (4) for performing gas pressure-boosting treatment, a cooler (401) for cooling the pressurized and heated gas, and a balancing tank (402) for buffering the compressed gas, wherein the inlet end of the compressor unit is connected to the outlet end of the first separator, the outlet end of the compressor unit is connected to the inlet end of the cooler, the outlet end of the cooler is connected to the inlet end of the balancing tank, and the outlet end of the balancing tank is externally connected to a subsequent terminal processing unit.

3. The oil and gas compression collection and processing device according to claim 2 is characterized in that: The outlet pipeline of the balance tank is also provided with a pipeline flame arrester (421), which is connected to a terminal processing unit. The terminal processing unit includes an external transmission pipeline network (424), a plant flare system (423) and an oxidation furnace unit (422).

4. The oil and gas compression collection and processing device according to claim 3 is characterized in that: The balance tank (402) is provided with a sewage outlet at the bottom, the sewage outlet is connected to the oil and gas processing system, and a liquid level meter is provided on the body of the balance tank.

5. The oil and gas compression collection and processing device according to claim 4 is characterized in that: The compressor unit (4) is a water screw compressor.

6. The oil and gas compression collection and processing device according to claim 4 is characterized in that: The crude oil storage and collection system comprises a crude oil storage tank (5) for temporarily storing crude oil and a desulfurization tower (6), wherein the inlet end of the crude oil storage tank is connected to the outlet end of the first separator, the outlet end of the crude oil storage tank is connected to the inlet end of the desulfurization tower, and a sewage outlet is provided at the bottom of the desulfurization tower, which is connected to the oil and gas processing system.

7. The oil and gas compression collection and processing device according to claim 6, characterized in that: The first separator (2), the balance tank (402) and the desulfurization tower (6) are all provided with exhaust ports at the top, and exhaust branches (3) are provided on the exhaust ports. The exhaust branches are connected in parallel to the emergency exhaust pipeline (301).

8. The oil and gas compression collection and processing device according to claim 7 is characterized in that: The oil and gas processing system comprises a first adsorption tower (7), a membrane system (8) and a second adsorption tower (9). The inlet end of the first adsorption tower is connected to the discharge outlets of the balance tank and the desulfurization tower respectively through a discharge pipeline, and an oil and gas compressor (703) is arranged on the discharge pipeline. The outlet end of the first adsorption tower is connected to the inlet end of the membrane system, and the outlet end of the membrane system is connected to the inlet end of the second adsorption tower. An exhaust port is arranged at the top of the second adsorption tower, and an exhaust pipeline (901) is arranged at the exhaust port. An exhaust valve (911) is arranged on the exhaust pipeline. The first adsorption tower is also connected to a lean oil system. The lean oil system comprises a lean oil pump (701) and a heat exchanger (702). The outlet end of the lean oil pump is connected to the outlet end of the heat exchanger, and the outlet end of the heat exchanger is connected to the inlet end of the absorption tower. A circulation pipeline is connected in parallel to the inlet end of the second adsorption tower, and the circulation pipeline is connected to the discharge pipeline at the inlet end of the oil and gas compressor (703). A vacuum pump (10) is arranged on the circulation pipeline.

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