CN-224226951-U - Crude oil electric dehydration equipment containing natural gas

Abstract

The utility model discloses crude oil electric dehydration equipment containing natural gas, which relates to the technical field of petroleum and natural gas processing, and comprises a tank body, a transformer, an internal part and a pipeline, wherein the tank body is sequentially divided into a gas-liquid separation area, an oil-water preliminary separation area, an electric dehydration area and an oil storage area, the tank body is positioned on the side wall of the gas-liquid separation area and is provided with a crude oil inlet, an inlet distributor is positioned at the crude oil inlet inside the tank body, a steady flow plate and an oil-water separation filler are arranged at the downstream of the gas-liquid separation area, an electrode plate is positioned at the electric dehydration area and is connected with the transformer, the separation weir plate separates the electric dehydration area from the oil storage area, the oil storage area is provided with an oil self vortex breaker and an oil phase opening, and the demister is arranged at the gas phase opening at the top of the tank body.

Inventors

• HAN SHUAI
• LIU ZUHU
• SUN YUN

Assignees

• 江苏金门能源装备有限公司

Dates

Publication Date

20260512

Application Date

20250603

Claims (10)

1. 1. The crude oil electric dehydration equipment containing natural gas is characterized by comprising a tank body, a transformer (5), internal parts and pipelines, wherein the internal parts comprise an inlet distributor (2), a current stabilizer (3), an oil-water separation filler (4), an electrode plate (6), a separation weir plate (7) and a demister (8), the inside of the tank body is sequentially divided into a gas-liquid separation area, an oil-water preliminary separation area, an electric dehydration area and an oil storage area, the side wall of the tank body, which is positioned in the gas-liquid separation area, is provided with a crude oil inlet (1), the inlet distributor (2) is positioned at the crude oil inlet (1) in the tank body, the current stabilizer (3) and the oil-water separation filler (4) are arranged at the downstream of the gas-liquid separation area, the electrode plate (6) is positioned in the electric dehydration area and connected with the transformer (5), the separation weir plate (7) separates the electric dehydration area from the oil storage area, the oil storage area is provided with a pure oil self-vortex-preventing device (10) and an oil phase port (11), and the demister (8) is arranged at a gas phase port (9) at the top of the tank body.
2. 2. An electric crude oil dewatering plant containing natural gas according to claim 1, characterized in that the inlet distributor (2) is a vane-type inlet plant or a cyclone-type inlet plant.
3. 3. The crude oil electric dehydration apparatus containing natural gas according to claim 1, wherein the electrode plate (6) is a horizontal multi-layer plate structure comprising an upper grounded plate, a middle high-voltage plate and a lower grounded plate, forming a strong electric field region and a weak electric field region.
4. 4. An electric crude oil dewatering plant containing natural gas according to claim 1, characterized in that the oil-water separation packing (4) is a wire mesh or blade type coalescing packing.
5. 5. The crude oil electric dewatering equipment with natural gas according to claim 1, further comprising a back flushing system comprising a flushing water pipe (29), a sewage drain pipe (214) and a bottom nozzle.
6. 6. A crude oil electric dewatering equipment containing natural gas according to claim 1, characterized in that the tank side wall is provided with a low level switch (25), the low level switch (25) is interlocked with the transformer (5), and the power supply is cut off when the liquid level is below the set value.
7. 7. A crude oil electric dewatering equipment containing natural gas according to claim 1, characterized in that the oil storage area and the water phase port (15) are provided with an oil phase level gauge (28) and a water phase level gauge (27), respectively, and are interlocked with an oil phase level control valve (213) and a water phase level control valve (211).
8. 8. A crude oil electric dewatering plant containing natural gas according to claim 1, characterized in that the demister filler of the demister (8) comprises wire mesh and vane type.
9. 9. An electric crude oil dewatering plant with natural gas according to claim 5, characterized in that the nozzles of the backwash system are evenly distributed along the tank bottom and the jet coverage areas overlap.
10. 10. An electric crude oil dewatering plant with natural gas according to claim 1, characterized in that the tank top is provided with a pressure sensor (22) and a pressure control valve (24).

Description

Crude oil electric dehydration equipment containing natural gas Technical Field The utility model relates to the technical field of petroleum and natural gas processing, in particular to crude oil electric dehydration equipment containing natural gas. Background In crude oil recovery, the oil well product is a multiphase mixture containing crude oil, natural gas, water, and impurities, usually requiring pretreatment, and the three-phase separator is usually the first device to treat the produced fluid at the wellhead in oilfield surface engineering. The main process of the three-phase separator is that the oil-water-gas mixture enters the three-phase separator through an inlet separation device, gas-liquid two-phase separation is realized through the inlet separation device, the separated gas leaves the separator from the other end of the separator, liquid drops carried by the gas leave the separator in the movement process, turbulence of the liquid separated through the inlet separation device is reduced through a flow stabilizing device, further separation of an oil phase and a water phase in the liquid is realized through parallel plate filler or coalescent filler, the water phase is under the condition that the oil phase is above, the oil phase enters an oil chamber under the action of a weir plate, and thus the separation of oil, gas and water phases is realized. The crude oil separated by the three-phase separator has water content which does not meet the requirement of external oil transportation and needs further treatment by adopting an electric dehydration process. The electric dehydration causes tiny water drops dispersed in crude oil to be aggregated into big water drops through the intensified coalescence of an electric field, and the big water drops continue to settle, thereby realizing the further separation of oil and water. The traditional crude oil treatment process generally adopts a series process of a three-phase separator and an electric dehydration tank, and has the advantages of dispersed equipment, long process, large occupied area, complex pipeline connection, high investment and operation and maintenance cost, increased energy consumption of an intermediate storage tank and a pumping link and hidden trouble of oil gas volatilization leakage. An integrated device is needed to separate natural gas from crude oil in a single device, desalt and dewater crude oil, simplify the process of crude oil treatment, and improve the safety and energy efficiency. Disclosure of utility model The utility model provides crude oil electric dehydration equipment containing natural gas, which can solve the problems that in the prior art, a three-phase separator and an electric dehydration tank are generally adopted in the traditional crude oil treatment process in series, the energy consumption is increased in a middle storage tank and a pumping link, and hidden danger of oil gas volatilization and leakage exists. The aim of the utility model can be achieved by the following technical scheme: The crude oil electric dehydration equipment comprises a tank body, a transformer, an inner part and a pipeline, wherein the inner part comprises an inlet distributor, a flow stabilizing plate, oil-water separation filler, an electrode plate, a separation weir plate and a demister, the inside of the tank body is sequentially divided into a gas-liquid separation area, an oil-water preliminary separation area, an electric dehydration area and an oil storage area, the tank body is positioned on the side wall of the gas-liquid separation area and is provided with a crude oil inlet, the inlet distributor is positioned at the crude oil inlet inside the tank body, the flow stabilizing plate and the oil-water separation filler are arranged at the downstream of the gas-liquid separation area, the electrode plate is positioned in the electric dehydration area and is connected with the transformer, the separation weir plate separates the electric dehydration area from the oil storage area, the oil storage area is provided with a pure oil self-vortex inhibitor and an oil phase port, and the demister is arranged at the gas phase port at the top of the tank body. Preferably, the inlet distributor is a vane-type inlet device or a swirl-type inlet device. Preferably, the electrode plate is in a horizontal multi-layer electrode plate structure and comprises an upper-layer grounding electrode plate, a middle-layer high-voltage electrode plate and a lower-layer grounding electrode plate, so that a strong electric field region and a weak electric field region are formed. Preferably, the oil-water separation filler is a silk screen type or blade type coalescence filler. Preferably, the device also comprises a back flushing system, wherein the back flushing system comprises a flushing water pipeline, a sewage pipeline and a bottom nozzle. Preferably, the side wall of the tank body is provided with a low liquid level switch, the low li