A petrochemical oil, gas and water three-phase separator

Abstract

A petrochemical oil, gas and water three-phase separator, in the field of petrochemical equipment, comprises a tank body, an inlet is provided at one end of the tank body, a pre-separation device is provided on the side of the tank body near the inlet, a coalescing device is provided on the side of the pre-separation device away from the inlet, a separation chamber is provided on the side of the coalescing device away from the pre-separation device, an oil-water separation device is provided in the separation chamber, a first demister and a second demister are provided at intervals on the upper end of the tank body, the first demister is located above the pre-separation device, the second demister is provided above the separation chamber, and the tank body is provided with an oil drain port and a water drain port. The present invention can improve the problems of low oil, gas and water separation efficiency, narrow adaptability and poor anti-fluctuation ability of the three-phase separator in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of petrochemical equipment, in particular to a petrochemical oil-gas-water three-phase separator. Background Art

[0002] After years of development, the performance of oil, gas and water three-phase separators has been continuously improved, and the separation efficiency has been continuously improved. It has been widely used in the process of oil field development. However, there are also some problems, which are specifically manifested in the following aspects:

[0003] ① Low separation efficiency. The components and content of oilfield produced fluid are constantly changing during the production process. The fluctuation of oil, gas and water flow will affect the equipment's separation effect on gas-liquid and oil-water, thereby causing the separator's separation performance to decline.

[0004] ②Narrow scope of application and poor anti-fluctuation ability. The oil, gas and water three-phase separators currently used are designed according to the specific conditions of the site and can only meet the oil, gas and water separation under such conditions. The separation effect may not be optimal for raw materials with different oil-water ratios. Summary of the Invention

[0005] The purpose of the present invention is to provide a petrochemical oil-gas-water three-phase separator, which can improve the problems of low oil-gas-water separation efficiency, narrow adaptability and poor anti-fluctuation ability of the three-phase separator in the prior art.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A petrochemical oil, gas and water three-phase separator comprises a tank body, an inlet is provided at one end of the tank body, a pre-separation device is provided on the side of the tank body close to the inlet, a coalescing device is provided on the side of the pre-separation device away from the inlet, a separation chamber is provided on the side of the coalescing device away from the pre-separation device, an oil-water separation device is provided in the separation chamber, a first demister and a second demister are provided at intervals on the upper end of the tank body, the first demister is located above the pre-separation device, the second demister is provided above the separation chamber, and the tank body is provided with an oil drain port and a water drain port.

[0008] The pre-separation device comprises a rotating disk, a liquid inlet is provided on a side of the rotating disk close to the inlet, and a liquid blocking plate is provided on a side of the rotating disk away from the inlet.

[0009] The above-mentioned coalescing device includes a mounting plate connected to the inner wall of the above-mentioned tank body, the above-mentioned mounting plate is located on the side of the above-mentioned liquid-blocking plate away from the above-mentioned rotating disk, the above-mentioned mounting plate is evenly provided with multiple mounting grooves, the above-mentioned mounting grooves are provided with coalescing filling pieces, and a turbine is provided between the above-mentioned liquid-blocking plate and the above-mentioned mounting plate.

[0010] Furthermore, in the present invention, a plurality of liquid collectors are evenly arranged on one side of the rotating disk close to the inlet, and the liquid inlet is arranged in the liquid collector.

[0011] Furthermore, in the present invention, the liquid collector is bowl-shaped, and the inlet end of the liquid inlet is opened on one side of the plane of the liquid collector.

[0012] Furthermore, in the present invention, there are multiple liquid blocking plates, and gaps are provided between adjacent liquid blocking plates. Multiple liquid holes are evenly provided on the plate surfaces of the liquid blocking plates, and the liquid holes of two adjacent liquid blocking plates are staggered.

[0013] Furthermore, in the present invention, a plurality of overflow slits are formed on a side of the mounting plate away from the liquid-blocking plate, and the plurality of overflow slits correspond to and communicate with the plurality of mounting grooves one by one.

[0014] Furthermore, in the present invention, the above-mentioned coalescing filler comprises a composite coalescing plate provided with gaps.

[0015] Furthermore, in the present invention, the oil-water separation device includes an oil storage tank arranged in the separation chamber, an oil baffle is provided on the side of the oil storage tank close to the inlet, a connecting gap is provided between the oil storage tank and the bottom wall of the separation chamber, and a water baffle is provided on the side of the oil storage tank away from the oil baffle.

[0016] Furthermore, in the present invention, the oil baffle and the water baffle are both connected to an automatic lifting structure, an oil-water interface detector is provided in the separation chamber, and the oil-water interface detector is electrically connected to the automatic lifting structure.

[0017] Furthermore, in the present invention, the oil-water interface detector is a radar level detector.

[0018] Compared with the prior art, the present invention has at least the following advantages or beneficial effects:

[0019] (1) When the present invention is in use, the raw material liquid enters the tank body from the above-mentioned inlet, and undergoes a series of actions such as the above-mentioned pre-separation, coalescence, and static stratification to achieve the effect of three-phase separation of oil, water, and gas. In addition, the gas is removed by the first demister and the second demister, and the two-phase separation of oil and water is achieved by the oil-water separation device, and an interface appears to achieve the separation of oil and water.

[0020] (2) By setting the rotating disk, the liquid passing through the inlet can pass through the liquid inlet under the action of the spiral. In this process, under the action of gravity and centrifugal force, the water phase particles and the oil phase particles collide violently, so that the free water is separated from the oil phase and agglomerated. In addition, the oil and water passing through the rotating disk are further subjected to mutual friction through the liquid blocking plate, thereby improving the effect of oil-water pre-separation. In addition, during the pre-separation, a part of the gas will be separated and extracted through the first demister to achieve a preliminary separation effect.

[0021] (3) The oil-water mixture is pre-treated in multiple installation tanks, and the free water or dispersed oil is subjected to agglomeration reaction under the agglomeration effect of the agglomeration filler in the installation tank, so that the oil-water mixture reaching the separation chamber can be quickly separated into two phases, and a two-phase interface is formed, which is convenient for rapid oil-water separation. In addition, during the steady flow or slow flow of the oil and water in the separation chamber, the remaining gas will overflow or volatilize. At this time, the second demister can extract the gas in the separation chamber, thereby improving the overall separation effect and speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic front cross-sectional view of an embodiment of the present invention.

[0024] Figure 2 For the embodiment of the present invention Figure 1 Enlarged view of point A in the middle.

[0025] Figure 3 For the embodiment of the present invention Figure 1 Enlarged view of point B in the middle.

[0026] Figure 4 This is a schematic diagram of the rotating disk structure according to an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the mounting plate structure according to an embodiment of the present invention.

[0028] Figure 6 It is a schematic top view of an embodiment of the present invention.

[0029] Figure 7 It is a left side schematic diagram of an embodiment of the present invention.

[0030] Figure 8 It is a right side schematic diagram of an embodiment of the present invention.

[0031] Icons: 1-tank body, 2-inlet, 3-separation chamber, 4-first demister, 5-second demister, 6-oil drain port, 7-water drain port, 8-liquid inlet, 9-liquid blocking plate, 10-rotating disk, 11-turbine, 12-liquid collector, 13-mounting plate, 14-coalescing filler, 15-mounting groove, 16-overflow seam, 17-liquid hole, 18-gap, 19-oil storage tank, 20-oil baffle plate, 21-water baffle plate, 22-water storage chamber, 23-oil-water interface detector. DETAILED DESCRIPTION

[0032] Example

[0033] according to Figures 1-8 As shown, an embodiment of the present application proposes a petrochemical oil-gas-water three-phase separator, comprising a tank body 1, an inlet 2 being provided at one end of the tank body 1, a pre-separation device being provided on the side of the tank body 1 close to the inlet 2, a coalescing device being provided on the side of the pre-separation device away from the inlet 2, a separation chamber 3 being provided on the side of the coalescing device away from the pre-separation device, an oil-water separation device being provided in the separation chamber 3, a first demister 4 and a second demister 5 being provided at intervals on the upper end of the tank body 1, the first demister 4 being located above the pre-separation device, the second demister 5 being provided above the separation chamber 3, and an oil drain port 6 and a water drain port 7 being provided on the tank body 1.

[0034] The pre-separation device includes a rotating disk 10 . A liquid inlet 8 is provided on a side of the rotating disk 10 close to the inlet 2 , and a liquid blocking plate 9 is provided on a side of the rotating disk 10 away from the inlet 2 .

[0035] The above-mentioned coalescing device includes a mounting plate 13 connected to the inner wall of the above-mentioned tank body 1, and the above-mentioned mounting plate 13 is located on the side of the above-mentioned liquid-blocking plate 9 away from the above-mentioned rotating disk 10. The above-mentioned mounting plate 13 is evenly provided with a plurality of mounting grooves 15, and the above-mentioned mounting grooves 15 are provided with coalescing fillers 14. A turbine 11 is provided between the above-mentioned liquid-blocking plate 9 and the above-mentioned mounting plate 13.

[0036] It should be noted that when this embodiment is in use, the raw liquid enters the tank body 1 from the above-mentioned inlet 2, and undergoes a series of actions such as the above-mentioned pre-separation, agglomeration, and static stratification to achieve the effect of three-phase separation of oil, water, and gas. Moreover, the gas is removed by the first demister 4 and the second demister 5, and the two-phase separation of oil and water is achieved by the oil-water separation device, and an interface appears to achieve the separation of oil and water. By setting the rotating disk 10, the liquid passing through the inlet 2 can pass through the liquid inlet 8 under the action of the spiral. In this process, under the action of gravity and centrifugal force, the water phase particles and the oil phase particles collide violently, so that the free water is separated and agglomerated from the oil phase. Moreover, the oil and water passing through the rotating disk 10 are further subjected to mutual friction by the liquid-blocking plate 9, thereby improving the effect of oil-water pre-separation. Moreover, during the pre-separation, a portion of the gas will be separated and extracted by the first demister 4 to achieve a preliminary separation effect. Through the pre-treatment of the oil-water mixture in multiple installation grooves 15, and under the agglomeration action of the agglomeration filler 14 in the installation groove 15, the free water or dispersed oil is subjected to agglomeration reaction, which can ensure that the oil-water mixture reaching the separation chamber 3 can be quickly separated into phases, and a two-phase interface is formed, which is convenient for rapid oil-water separation. In addition, during the steady flow or slow flow of the oil and water in the separation chamber 3, the remaining gas will overflow or volatilize. At this time, the second demister 5 can extract the gas in the separation chamber 3 to improve the overall separation effect and speed.

[0037] The arrangement of the turbine 11 can help the liquid passing through the liquid-blocking plate 9 to be quickly pressurized and move toward the coalescing device, thereby improving the stability of the entire process.

[0038] Moreover, a plurality of liquid collectors 12 are evenly arranged on one side of the rotating disk 10 close to the inlet 2, and the liquid inlet 8 is arranged in the liquid collector 12, which can ensure that the liquid can be realized when the rotating disk 10 rotates.

[0039] Specifically, the liquid collector 12 is bowl-shaped, and the inlet 2 ends of the liquid inlet 8 are opened on one side of the plane of the liquid collector 12. In the actual working process, multiple liquid collectors 12 are synchronously rotated under the drive of the rotating disk 10. At this time, the opening plane of the bowl-shaped liquid collector 12 has a certain inclination angle with the end surface of the rotating disk 10, and the optimal angle is 90°. During the rotation of the liquid collector 12, the bowl-shaped liquid collector 12 realizes the wrapped collection of the incoming liquid, which can ensure that the incoming liquid passes through the rotating disk 10 efficiently. Moreover, during the working process, the bowl-shaped liquid collector 12 enables the liquid to achieve high-frequency tangential collision with the liquid collector 12, which can improve the efficiency of three-phase separation.

[0040] It is worth noting that the rotating disk 10 is driven by a motor connected to the tank body 1, and the speed of the rotating disk 10 is adjustable. The speed of the rotating disk 10 can be adjusted in real time according to the amount of liquid inflow to ensure the best effect.

[0041] There is a preset space between the liquid-blocking plate 9 and the rotating disk 10. The liquid processed by the rotating disk 10 first enters the space, and is squeezed and moved directly toward the liquid-blocking plate 9 under the spiral centrifugal force of the rotating disk 10. Moreover, the first demister 4 is located above the space, which can efficiently realize the preliminary demisting operation.

[0042] In addition, in order to improve the pre-separation effect of the liquid-blocking plate 9, there are multiple liquid-blocking plates 9, and gaps 18 are set between adjacent liquid-blocking plates 9. Multiple liquid-through holes 17 are evenly opened on the plate surface of the liquid-blocking plate 9, and the liquid-through holes 17 of two adjacent liquid-blocking plates 9 are staggered with each other.

[0043] In the actual working process, the liquid passing through the liquid inlet 8 on the rotating disk 10 moves and is squeezed toward the liquid-blocking plate 9 under the spiral action of the rotating disk 10. During the extrusion process, the liquid directly enters the above-mentioned gap 18 through the above-mentioned liquid holes 17. At the same time, under the action of extrusion, the liquid passes through another set of staggered liquid holes 17. Under the action of multiple liquid-blocking plates 9, the liquid realizes mutual friction between the liquid particles, promotes the separation of free water, and further improves the pre-separation effect.

[0044] The liquid material after the pre-separation process realizes the preliminary separation of the three phases of oil, gas and water and directly enters the above-mentioned coalescing device. Under the full coalescing action of the above-mentioned coalescing filler 14, the aggregation connection between the same phases of oil and water is achieved, thereby ensuring the stability of the subsequent slow flow stratification process.

[0045] Specifically, a plurality of overflow slits 16 are provided on a side of the mounting plate 13 away from the liquid-blocking plate 9. The plurality of overflow slits 16 correspond one-to-one to and are connected to the plurality of mounting grooves 15. The pre-separated liquid enters the mounting groove 15 and interacts with the coalescing filler 14 in the mounting groove 15 to achieve same-phase coalescence of the oil and water phases. The coalescing filler 14 is made of a hydrophilic and oleophobic material or an oleophilic and hydrophobic material, and can adsorb the free oil phase or water phase when the oil phase or the water phase comes into contact, so that the free oil phase or the water phase can gradually be connected into pieces, thereby achieving a coalescence effect.

[0046] In this embodiment, a composite agglomerating plate with interstices is used as the agglomerating filler 14. Specifically, the plate is made of a galvanized material with an oleophilic coating. This plate has excellent oil removal performance, and the coating on its surface has strong adhesion to the metal, is corrosion-resistant, and can be used for a long time. Operation and maintenance are simple and reliable. The porous structure ensures stable flow of liquid. The honeycomb-shaped pores are interconnected, and the coating stabilizes the inner wall of the pores, increasing the flow path of the liquid and improving the agglomeration effect.

[0047] After the coalescence, the feed liquid directly enters the above-mentioned separation chamber 3. Due to the action of the above-mentioned overflow seam 16, the flow rate of the feed liquid is slowed down and it flows steadily into the separation chamber 3. The feed liquid in the separation chamber 3 realizes obvious stratification of the water phase and the oil tank under the action of slow flow or static state. Moreover, through the dual action of pre-separation and coalescence, the stratification speed of the oil-water phase in the separation chamber 3 can be accelerated, thereby improving efficiency.

[0048] Corresponding to the separation of oil and water phases, specifically, the above-mentioned oil-water separation device includes an oil storage tank 19 arranged in the above-mentioned separation chamber 3, an oil baffle plate 20 is provided on the side of the above-mentioned oil storage tank 19 close to the above-mentioned inlet 2, a connecting gap 18 is provided between the above-mentioned oil storage tank 19 and the bottom wall of the above-mentioned separation chamber 3, and a water baffle plate 21 is provided on the side of the above-mentioned oil storage tank 19 away from the above-mentioned oil baffle plate 20.

[0049] During the actual separation process, the above-mentioned oil baffle 20 is located above the oil-water interface. When the oil reaches a certain height, it can pass over the oil baffle 20 and enter the oil storage tank 19, and the separation chamber 3, the oil storage tank 19, the connecting gap 18 and the water baffle 21 together form a communicating vessel, so that the water phase can flow to the side of the water baffle 21 through the effect of the communicating vessel, and can achieve the effect of external discharge through the water baffle 21.

[0050] Moreover, a water storage chamber 22 is provided on the side of the water baffle 21 away from the oil storage tank 19, and the water phase can directly enter the water storage chamber 22 through the water baffle 21, and the oil storage tank 19 and the water storage chamber 22 are respectively connected to the oil discharge port 6 and the water discharge port 7 through pipelines, and a controllable liquid pumping operation is achieved through an external liquid pumping pump to realize the final separation operation of the water phase and the oil phase.

[0051] It is worth noting that the above-mentioned oil baffle 20 and the above-mentioned water baffle 21 are both connected to an automatic lifting structure, and an oil-water interface detector 23 is provided in the above-mentioned separation chamber 3. The above-mentioned oil-water interface detector 23 is electrically connected to the above-mentioned automatic lifting structure, and the above-mentioned oil-water interface detector 23 is a radar liquid level detector.

[0052] During specific operations, the volume processing capacity and operational safety are considered. The principle of this technology is to utilize the difference in dielectric constants between oil and water. Using a transmit-reflect-receive mode, the radar emits high-frequency electromagnetic waves, which propagate to the surface of the liquid being measured. After reflection, they are received by the instrument. The spatial distance to be measured is proportional to the time difference between the transmitted and received pulses, from which the total liquid level and interface position are calculated. The advantages of this measurement method include low energy consumption, low signal sensitivity, stable test performance, and simple installation and maintenance.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A petrochemical oil, gas and water three-phase separator, characterized in that: The invention comprises a tank body, wherein one end of the tank body is provided with an inlet, a pre-separation device is provided on a side of the tank body close to the inlet, a coalescing device is provided on a side of the pre-separation device away from the inlet, a separation chamber is provided on a side of the coalescing device away from the pre-separation device, an oil-water separation device is provided in the separation chamber, a first demister and a second demister are provided at intervals on the upper end of the tank body, the first demister is located above the pre-separation device, and the second demister is provided above the separation chamber, and the tank body is provided with an oil discharge port and a water discharge port; The pre-separation device includes a rotating disk, a liquid inlet is provided on a side of the rotating disk close to the inlet, and a liquid blocking plate is provided on a side of the rotating disk away from the inlet; a plurality of liquid collectors are evenly arranged on the side of the rotating disk close to the inlet, and the liquid inlet is provided in the liquid collectors; the liquid collectors are bowl-shaped, and the inlet end of the liquid inlet is opened on one side of the liquid collector plane; the bowl-shaped liquid collector opening plane has an inclination angle with the end surface of the rotating disk; The coalescing device includes a mounting plate connected to the inner wall of the tank body, the mounting plate is located on the side of the liquid-blocking plate away from the rotating disk, the mounting plate is evenly provided with a plurality of mounting grooves, the mounting grooves are provided with coalescing filling pieces, and a turbine is provided between the liquid-blocking plate and the mounting plate.

2. The petrochemical oil, gas and water three-phase separator according to claim 1, characterized in that: There are multiple liquid-blocking plates, and gaps are provided between adjacent liquid-blocking plates. Multiple liquid-through holes are evenly provided on the plate surfaces of the liquid-blocking plates, and the liquid-through holes of two adjacent liquid-blocking plates are staggered with each other.

3. The petrochemical oil, gas and water three-phase separator according to claim 1, characterized in that: A plurality of overflow slots are formed on a side of the mounting plate away from the liquid-blocking plate, and the plurality of overflow slots correspond to and are in communication with the plurality of mounting grooves.

4. The petrochemical oil, gas and water three-phase separator according to claim 3, characterized in that: The coalescing filler comprises a composite coalescing plate with gaps.

5. The petrochemical oil, gas and water three-phase separator according to claim 1, characterized in that: The oil-water separation device includes an oil storage tank arranged in the separation chamber, an oil baffle is provided on the side of the oil storage tank close to the inlet, a connecting gap is provided between the oil storage tank and the bottom wall of the separation chamber, and a water baffle is provided on the side of the oil storage tank away from the oil baffle.

6. The petrochemical oil, gas and water three-phase separator according to claim 5, characterized in that: The oil baffle and the water baffle are both connected to an automatic lifting structure. An oil-water interface detector is provided in the separation chamber, and the oil-water interface detector is electrically connected to the automatic lifting structure.

7. The petrochemical oil-gas-water three-phase separator according to claim 6, characterized in that: The oil-water interface detector is a radar liquid level detector.

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