Oil and gas field high-emulsification sewage treatment device and use method thereof

Abstract

The invention relates to the technical field of oilfield exploitation, and discloses an oil and gas field high-emulsification sewage treatment device and a using method thereof.The oil and gas field high-emulsification sewage treatment device comprises a plurality of small input holes formed in the outer wall of the bottom of a sliding block, an annular connecting channel is formed in the inner wall of the sliding block, and a conical channel is formed in the inner wall of the sliding block; a plurality of output holes are formed in the inner wall of the sliding block, the diameter of the whole conical ring at the end, communicated with the annular connecting channel, of the conical channel is the largest, the closer the conical channel is to the output holes, the conical ring can be gradually shrunk, and the diameter of the conical ring at the position, communicated with the output holes, of the conical channel is the smallest. The conical channel is arranged in the middle of the conical channel, so that in the process that high-pressure air-dissolved water moves from the conical channel, due to the spiral effect of the conical channel, the high-pressure air-dissolved water is subjected to centrifugal force and shearing force, small bubbles separated out of the conical channel are further sheared and become smaller, meanwhile, bubble merging is restrained, and the treatment effect during slag removal is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield exploitation, in particular to an oil and gas field highly emulsified sewage treatment device and a use method thereof. Background Art

[0002] During the oil and gas field exploitation process, the treatment of highly emulsified oil and gas field wastewater has always been a key and difficult issue in the industry. Highly emulsified oil and gas field wastewater has a complex composition. It not only contains a large amount of emulsified oil, but also contains high concentrations of salts, suspended solids and various additives. The emulsified oil droplets are tiny in size and covered with a stable emulsion film on the surface, making oil-water separation extremely difficult. Dissolved air flotation is a commonly used equipment for treating such wastewater. Its working principle is to utilize the different solubility of water at different pressures to pressurize and aerate part or all of the water to be treated, so that the air dissolves in the water to form dissolved air water. The air is then released under reduced pressure under normal pressure. The air dissolved in the water precipitates in the form of tiny bubbles. These bubbles can adhere to oil droplets and suspended solids, and the pollutants float to the water surface through buoyancy, thereby achieving oil-water and solid-liquid separation.

[0003] During the operation of a dissolved air flotation machine, the release channel is a key component for decompressing the dissolved air and generating bubbles. Traditional dissolved air flotation machines often use a single release channel design. However, when the dissolved air is released through a single release channel (such as a traditional orifice plate or straight tube channel), the pressure drop within the channel is uneven, easily forming localized "high-pressure gradient zones." This causes large amounts of gas to precipitate quickly, forming dense bubble clusters. Because the release area of ​​a single channel is concentrated and lacks diversion and buffering, these bubbles accumulate due to collisions and mergers during their rise, forming large-diameter bubble clusters that affect wastewater treatment efficiency. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides an oil and gas field highly emulsified wastewater treatment device, comprising a housing, a slag scraping device fixedly connected to the outer wall of the housing, a mud outlet fixedly connected to the outer wall of the housing, and a slag notch fixedly connected to the inner wall of the housing, and further comprising:

[0005] The air release mechanism has an outer wall fixedly connected to the inner wall of the shell, and is used to release the pressure of the high-pressure dissolved air water;

[0006] A pressure stabilizing mechanism, wherein the outer wall of the pressure stabilizing mechanism is fixedly connected to the inner wall of the gas release mechanism, and the pressure stabilizing mechanism is used to stabilize the high-pressure dissolved gas pressure;

[0007] A limiting mechanism, wherein the outer wall of the limiting mechanism is fixedly connected to the inner wall of the shell, and the limiting mechanism is used to limit the output of clean water;

[0008] The inner wall of the shell is fixedly connected to a sewage input port, the inner wall of the shell is fixedly connected to a demulsifier input port, the inner wall of the shell is opened with a mixed liquid channel, the inner wall of the shell is fixedly connected to a separation chamber partition, the outer wall of the shell is fixedly connected to a high-pressure dissolved air tank, and the outer wall of the high-pressure dissolved air tank is fixedly connected to a high-pressure dissolved air liquid pipeline.

[0009] When in use, first place the entire device in the desired location, then input the sewage to be treated into the device through the sewage inlet, and at the same time input the demulsifier into the device through the demulsifier inlet, so that the sewage and demulsifier are fully mixed, and then enter the mixing chamber through the mixed liquid channel;

[0010] Preferably, the air release mechanism comprises:

[0011] The outer wall of the gas release component is fixedly connected to the outer wall of the high-pressure dissolved gas pipeline.

[0012] Preferably, the voltage stabilizing mechanism includes:

[0013] A voltage stabilizing component, wherein the outer wall of the voltage stabilizing component is fixedly connected to the inner wall of the gas release component;

[0014] The output component is opened on the outer wall of the voltage stabilizing component.

[0015] Preferably, the limiting mechanism includes:

[0016] A support assembly, wherein the outer wall of the support assembly is fixedly connected to the outer wall of the high-pressure dissolved gas tank;

[0017] The limiting component is rotatably connected at the outer wall of the limiting component and the inner wall of the supporting component.

[0018] Preferably, the gas release assembly includes two connectors fixedly connected to the outer wall of the high-pressure dissolved gas pipeline, the outer wall of the connector is fixedly connected to the pressure releaser shell, and the inner wall of the pressure releaser shell is fixedly connected to a plurality of output pipes.

[0019] Open the high-pressure dissolved air tank so that the high-pressure dissolved air water in the high-pressure dissolved air tank is transported to the connector through the high-pressure dissolved air liquid pipeline;

[0020] Preferably, the pressure stabilizing assembly includes a limiting block fixedly connected to the inner wall of the connector, a sliding block slidably connected to the inner wall of the pressure release housing, and a reset spring fixedly connected to the top outer wall of the sliding block;

[0021] The outer wall of one end of the return spring away from the sliding block is fixedly connected to the inner wall of the pressure release device shell.

[0022] When the high-pressure dissolved air water is not output, due to the presence of the return spring, the sliding block is made to fit tightly with the outer wall of the bottom of the sliding block and the outer wall of the limiting block under the action of the elastic potential energy of the return spring. When the high-pressure dissolved air water reaches the contact point between the limiting block and the sliding block, the high-pressure dissolved air water pushes the sliding block toward the pressure release device shell, thereby causing the return spring to be compressed. At the same time, since the sliding block begins to move away from the limiting block at this time, the high-pressure dissolved air water can begin to be output through the inside of the sliding block. Since the high-pressure dissolved air water output from the inside of the high-pressure dissolved air tank will cause pressure fluctuations due to the action of other factors such as the pipeline, the supersaturated gas in the high-pressure dissolved air water will be precipitated prematurely, resulting in unsatisfactory subsequent slag removal effect.

[0023] Preferably, the output assembly includes a plurality of input holes formed on the outer wall of the bottom of the sliding block, an annular connecting channel formed on the inner wall of the sliding block, a tapered channel formed on the inner wall of the sliding block, and a plurality of output holes formed on the inner wall of the sliding block;

[0024] The annular connecting channel is interconnected with a plurality of input holes, the tapered channel is interconnected with the annular connecting channel, and one end of the tapered channel away from the annular connecting channel is interconnected with a plurality of output holes.

[0025] When the pressure of high-pressure dissolved air water decreases due to various factors, the pressure of the dissolved air water on the sliding block will decrease. At this time, under the action of the return spring, the sliding block will be moved closer to the limiting block, thereby reducing the gap between the limiting block and the sliding block. Furthermore, when the conveying gap is reduced, the pressure of the liquid will increase, thereby reducing some of the lost dissolved air and reducing the impact on subsequent slag removal.

[0026] When the high-pressure dissolved air water reaches the input small hole of the sliding block, the high-pressure dissolved air water will enter the annular connecting channel through several input small holes. Since the several input small holes are connected to the annular connecting channel, the high-pressure dissolved air water entering the several annular connecting channels will converge in the annular connecting channel. Further, the high-pressure dissolved air water gathered in the annular connecting channel will continue to move through the tapered channel. Since the diameter of the entire tapered ring at the end where the tapered channel is connected to the annular connecting channel is the largest, and the closer the tapered channel is to the output hole, the more its tapered ring will gradually shrink, so that the diameter of the tapered ring at the place where it is connected to the several output holes is the smallest, and thus, in the process of moving from the tapered channel, the high-pressure dissolved air water will be subjected to centrifugal force and shear force due to the spiral action of the tapered channel, and the small bubbles precipitated in the tapered channel will be further sheared, thereby becoming smaller, and at the same time, the merging of bubbles is suppressed, thereby increasing the processing effect during slag removal;

[0027] At the same time, since the diameter of the channel wall where the tapered channel connects to the annular connecting channel is the largest, and as the tapered channel shrinks, the diameter of the channel wall also gradually shrinks, and the diameter of the channel wall where the output hole is connected is the smallest, the channel of the high-pressure dissolved air water gradually decreases as it approaches the output hole, so that the water flow velocity of the high-pressure dissolved air water gradually increases and the pressure gradually decreases, making the high-pressure dissolved air water stable during the pressure release process, making the state of reducing the water flow more stable, reducing the uneven bubble precipitation caused by local vortex or pressure fluctuation, and at the same time, the stable pressure release process can also reduce the water flow impact of the high-pressure dissolved air water during output, prolong the residence time and precipitation process of the dissolved air water, and reduce the gas waste caused by insufficient precipitation;

[0028] Preferably, the support assembly includes a clean water return pipe fixedly connected to the outer wall of the high-pressure dissolved air tank, an inclined plate fixedly connected to the inner wall of the shell, a clean water partition fixedly connected to the inner wall of the shell, and a clean water output port is opened on the inner wall of the shell.

[0029] The dissolved air water reaches the inside of the pressure release device shell through the output hole and is then output through the output pipe, where it mixes with the demulsifier and sewage mixture. Under the action of tiny bubbles precipitated by the dissolved air water, the tiny bubbles will be adsorbed or embedded in the impurities such as demulsified flocs in the mixture through van der Waals force, surface tension, etc., forming a complex with a density lower than that of water. At this time, the dissolved air water and the mixed liquid reach the separation chamber between the separation chamber partition and the clean water partition. At this time, the complex will float to the water surface due to buoyancy to form a scum layer during the flow process. At this time, the drive motor in the scraper device will drive the scraper to scrape the scum layer on the surface to the scum notch.

[0030] Preferably, the limiting assembly includes a connecting shaft rotatably connected to the inner wall of the clean water partition, a torsion spring is sleeved on the outer wall of the connecting shaft, and a one-way plate is fixedly connected to the outer wall of the connecting shaft.

[0031] When the device just starts to operate, the liquid level in the separation chamber gradually rises. If the clean water outlet is opened directly at this time, some scum will enter the clean water pipe along with the clean water, which will further pollute the treated clean water and affect the treatment effect. In the process of gradually rising liquid level, due to the presence of the torsion spring and the middle part of the torsion spring restricting the movement of the one-way plate, the two ends of the torsion spring are tightly attached to the outer wall of the clean water partition, so that the liquid in the separation chamber cannot leave the separation chamber during the rising process of the liquid level. As the liquid level continues to rise, the pressure on the one-way plate gradually increases. When the pressure on the one-way plate reaches a certain limit and then exceeds the pressure of the torsion spring on the one-way plate, the one-way plate will rotate around the connection with the connecting shaft, so that the clean water can flow into the clean water through the one-way plate and be discharged through the clean water outlet. At the same time, a part of the clean water enters the high-pressure dissolved air tank through the clean water return pipe to produce high-pressure dissolved air water.

[0032] A method for using an oil and gas field highly emulsified wastewater treatment device comprises the following steps:

[0033] S1: Input sewage and demulsifier: Input sewage and demulsifier into the equipment through the sewage input port and the demulsifier input port;

[0034] S2: Input high-pressure dissolved air water: Use a high-pressure dissolved air tank to input high-pressure dissolved air water into the equipment through a high-pressure dissolved air liquid pipeline.

[0035] The present invention has the following beneficial effects:

[0036] (1) In order to solve the problem that a single release channel may cause excessive pressure release and easily cause bubbles to gather when releasing high-pressure dissolved air water, the present invention is provided with an output component. When the high-pressure dissolved air water reaches the input small hole of the sliding block, the high-pressure dissolved air water will enter the annular connecting channel through several input small holes. Since several input small holes are interconnected with the annular connecting channel, the high-pressure dissolved air water entering the several annular connecting channels will converge in the annular connecting channel. Furthermore, the high-pressure dissolved air water gathered in the annular connecting channel will continue to move through the conical channel. Since the diameter of the entire conical ring at the end where the conical channel is connected to the annular connecting channel is the largest, and the closer the conical channel is to the output hole, the more its conical ring shrinks, so that the diameter of the conical ring at the point where it is connected to the several output holes is the smallest. As a result, the high-pressure dissolved air water will be subjected to centrifugal force and shear force due to the spiral action of the conical channel during its movement from the conical channel, so that the small bubbles precipitated in the conical channel are further sheared, thereby becoming smaller, and at the same time, the bubble merging is suppressed, thereby increasing the processing effect during slag removal.

[0037] (2) The present invention utilizes the above-mentioned mechanism. Since the diameter of the channel wall where the conical channel connects to the annular connecting channel is the largest, and as the conical channel shrinks, the diameter of the channel wall also gradually shrinks. The diameter of the channel wall where the output hole is connected is the smallest, so that the channel of the high-pressure dissolved air water gradually decreases as it approaches the output hole, so that the water flow velocity of the high-pressure dissolved air water gradually increases, and the pressure gradually decreases, so that the high-pressure dissolved air water is stable in the pressure release process, and the state of reducing the water flow is more stable, reducing the uneven bubble precipitation caused by local vortex or pressure fluctuation. At the same time, the stable pressure release process can also reduce the water flow impact of the high-pressure dissolved air water during output, prolong the residence time of the dissolved air water and the precipitation process, and reduce the gas waste caused by insufficient precipitation;

[0038] (3) In order to solve the problem of pressure fluctuations caused by various factors during the output of high-pressure dissolved air water, which in turn causes the dissolved air water to be unstable, the present invention is provided with a pressure stabilizing component. When the high-pressure dissolved air water is not output, due to the presence of the reset spring, the bottom outer wall of the sliding block is tightly fitted with the outer wall of the limiting block under the action of the elastic potential energy of the reset spring. When the high-pressure dissolved air water reaches the fitting point between the limiting block and the sliding block, the high-pressure dissolved air water pushes the sliding block toward the pressure release device housing, thereby causing the reset spring to be compressed. At the same time, since the sliding block begins to move away from the limiting block at this time, the high-pressure dissolved air water can begin to be output through the inside of the sliding block. Since the high-pressure dissolved air water output from the inside of the high-pressure dissolved air tank will be compressed by the pipeline, the high-pressure dissolved air water output from the inside of the high-pressure dissolved air tank will be compressed by the pipeline. The influence of other factors such as pressure fluctuations will cause supersaturated gas in high-pressure dissolved air water to precipitate in advance, resulting in unsatisfactory effect of subsequent slag removal. At this time, when the pressure of high-pressure dissolved air water decreases due to various factors, the pressure of the dissolved air water on the sliding block will decrease. At this time, under the action of the return spring, the sliding block will be close to the limiting block, thereby reducing the gap between the limiting block and the sliding block. Furthermore, when the conveying gap is reduced, the output of dissolved air water decreases. After the flow rate is reduced, the flow rate of dissolved air water in the releaser and the front pipeline slows down, the impact energy of the pressure fluctuation is partially buffered, and the gas precipitation process is smoother, thereby reducing part of the lost dissolved air, thereby reducing the impact on subsequent slag removal.

[0039] (4) The present invention solves the problem that when the scum is first separated, part of the scum will be discharged with the clean water due to the gradual rise of the liquid level, causing pollution to the clean water. A limiting mechanism is provided. Since the liquid level in the separation chamber is gradually rising, if the clean water outlet is directly opened at this time, part of the scum will enter the clean water pipe with the clean water, and then pollute the treated clean water, affecting the treatment effect. In the process of gradual rise of the liquid level, due to the presence of the torsion spring and the middle part of the torsion spring limiting the movement of the one-way plate, the two ends of the torsion spring are tightly attached to the outer wall of the clean water partition, so that the liquid cannot leave the separation chamber during the rising process of the liquid level in the separation chamber. As the liquid level continues to rise, the pressure on the one-way plate gradually increases. When the pressure on the one-way plate reaches a certain limit and exceeds the pressure of the torsion spring on the one-way plate, the one-way plate will rotate around the connection with the connecting shaft, so that the clean water can flow into the clean water through the one-way plate and be discharged through the clean water outlet. At the same time, part of the clean water enters the high-pressure dissolved air tank through the clean water return pipe to produce high-pressure dissolved air water. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention;

[0042] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0043] Figure 3 It is a cross-sectional schematic diagram of the air release mechanism of the present invention;

[0044] Figure 4 A schematic diagram of a gas release assembly according to the present invention;

[0045] Figure 5 It is a cross-sectional schematic diagram of the voltage stabilizing mechanism of the present invention;

[0046] Figure 6 For the present invention Figure 5 A magnified schematic diagram of point A in the middle;

[0047] Figure 7 This is a schematic cross-sectional view of a voltage stabilizing assembly of the present invention;

[0048] Figure 8 is a cross-sectional schematic diagram of an output assembly of the present invention;

[0049] Figure 9 It is a cross-sectional schematic diagram of the limiting mechanism of the present invention;

[0050] Figure 10 is a schematic cross-sectional view of a support assembly of the present invention;

[0051] Figure 11 is a schematic cross-sectional view of a restriction assembly of the present invention;

[0052] Figure 12 For the present invention Figure 11 A magnified schematic diagram of point B in the middle;

[0053] Figure 13 Schematic diagram of the workflow of the present invention.

[0054] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0055] In the figure: 1. gas release mechanism; 12. gas release assembly; 13. housing; 14. scraper; 15. mud outlet; 16. scum notch; 111. sewage inlet; 112. demulsifier inlet; 113. mixed liquid channel; 114. separation chamber partition; 115. high-pressure dissolved gas tank; 116. high-pressure dissolved gas liquid pipeline; 121. connector; 122. pressure release housing; 123. output pipe; 2. pressure stabilizing mechanism; 21. pressure stabilizing assembly; 2 2. Output assembly; 211. Limiting block; 212. Sliding block; 213. Return spring; 221. Input orifice; 222. Annular connecting channel; 223. Conical channel; 224. Output orifice; 3. Limiting mechanism; 31. Support assembly; 32. Limiting assembly; 311. Clean water return pipe; 312. Inclined plate; 313. Clean water partition; 314. Clean water output port; 321. Connecting shaft; 322. Torsion spring; 323. One-way plate. DETAILED DESCRIPTION

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0057] For example 1, please refer to Figure 1 - Figure 7 The present invention is a highly emulsified wastewater treatment device for oil and gas fields, comprising a housing 13, a scraping device 14 fixedly connected to the outer wall of the housing 13, a mud outlet 15 fixedly connected to the outer wall of the housing 13, and a scum notch 16 fixedly connected to the inner wall of the housing 13, and further comprising:

[0058] The air release mechanism 1 is fixedly connected to the inner wall of the housing 13 at its outer wall, and is used to release the high-pressure dissolved air water;

[0059] The pressure stabilizing mechanism 2 is fixedly connected to the inner wall of the gas release mechanism 1 at its outer wall, and is used to stabilize the high-pressure dissolved gas pressure;

[0060] The limiting mechanism 3, the outer wall of the limiting mechanism 3 is fixedly connected to the inner wall of the housing 13, and the limiting mechanism 3 is used to limit the output of clean water;

[0061] A sewage input port 111 is fixedly connected to the inner wall of the shell 13, a demulsifier input port 112 is fixedly connected to the inner wall of the shell 13, a mixed liquid channel 113 is opened on the inner wall of the shell 13, a separation chamber partition 114 is fixedly connected to the inner wall of the shell 13, a high-pressure dissolved air tank 115 is fixedly connected to the outer wall of the shell 13, and a high-pressure dissolved air liquid pipeline 116 is fixedly connected to the outer wall of the high-pressure dissolved air tank 115.

[0062] When in use, first place the entire device in the desired location, then input the sewage to be treated into the device through the sewage inlet 111, and at the same time input the demulsifier into the device through the demulsifier inlet 112, so that the sewage and demulsifier are fully mixed, and then enter the mixing chamber through the mixed liquid channel 113;

[0063] The air release mechanism 1 comprises:

[0064] The outer wall of the gas release component 12 is fixedly connected to the outer wall of the high-pressure dissolved gas pipeline 116.

[0065] The voltage stabilizing mechanism 2 includes:

[0066] A voltage stabilizing component 21, wherein the outer wall of the voltage stabilizing component 21 is fixedly connected to the inner wall of the gas release component 12;

[0067] The output component 22 is provided on the outer wall of the voltage stabilizing component 21 .

[0068] Restriction agencies 3 include:

[0069] The outer wall of the support assembly 31 is fixedly connected to the outer wall of the high-pressure dissolved gas tank 115;

[0070] The limiting component 32 has an outer wall that is rotatably connected to the inner wall of the supporting component 31 .

[0071] The gas release assembly 12 includes two connectors 121 fixedly connected to the outer wall of the high-pressure gas solution pipeline 116. The outer wall of the connector 121 is fixedly connected to a pressure releaser housing 122. The inner wall of the pressure releaser housing 122 is fixedly connected to a plurality of output pipes 123.

[0072] Open the high-pressure dissolved air tank 115 so that the high-pressure dissolved air water in the high-pressure dissolved air tank 115 is transported to the connector 121 through the high-pressure dissolved air liquid pipeline 116;

[0073] The voltage stabilizing assembly 21 includes a limiting block 211 fixedly connected to the inner wall of the connector 121, a sliding block 212 slidably connected to the inner wall of the pressure release housing 122, and a return spring 213 fixedly connected to the top outer wall of the sliding block 212;

[0074] The outer wall of one end of the return spring 213 away from the sliding block 212 is fixedly connected to the inner wall of the pressure release device housing 122 .

[0075] When the high-pressure dissolved air water is not output, due to the presence of the return spring 213, the sliding block 212 is tightly fitted with the outer wall of the bottom of the sliding block 212 and the outer wall of the limiting block 211 under the action of the elastic potential energy of the return spring 213. When the high-pressure dissolved air water reaches the contact point between the limiting block 211 and the sliding block 212, the high-pressure dissolved air water pushes the sliding block 212 toward the pressure release device housing 122, thereby causing the return spring 213 to be compressed. At the same time, since the sliding block 212 begins to move away from the limiting block 211 at this time, the high-pressure dissolved air water can begin to be output through the inside of the sliding block 212. Since the high-pressure dissolved air water output from the inside of the high-pressure dissolved air tank 115 will cause pressure fluctuations due to other factors such as the pipeline, the supersaturated gas in the high-pressure dissolved air water will be precipitated prematurely, resulting in unsatisfactory subsequent slag removal effect.

[0076] For example 2, please refer to Figure 2 - Figure 12 The present invention is a highly emulsified wastewater treatment device for oil and gas fields. Based on the first embodiment, the output assembly 22 includes a plurality of input holes 221 formed on the outer wall of the bottom of the sliding block 212, an annular connecting channel 222 formed on the inner wall of the sliding block 212, a tapered channel 223 formed on the inner wall of the sliding block 212, and a plurality of output holes 224 formed on the inner wall of the sliding block 212.

[0077] The annular connecting channel 222 is interconnected with the plurality of input holes 221 , the tapered channel 223 is interconnected with the annular connecting channel 222 , and one end of the tapered channel 223 away from the annular connecting channel 222 is interconnected with the plurality of output holes 224 .

[0078] When the pressure of the high-pressure dissolved air water decreases due to various factors, the pressure of the dissolved air water on the sliding block 212 will decrease. At this time, under the action of the return spring 213, the sliding block 212 will be moved close to the limiting block 211, thereby reducing the gap between the limiting block 211 and the sliding block 212. Furthermore, when the delivery gap is reduced, the output of the dissolved air water is reduced. After the flow rate is reduced, the flow rate of the dissolved air water in the releaser and the front pipe is slowed down, the impact energy of the pressure fluctuation is partially buffered, and the gas precipitation process is smoother, thereby reducing part of the lost dissolved air and thus reducing the impact on the subsequent slag removal.

[0079] When the high-pressure dissolved air water reaches the input small hole 221 of the sliding block 212, the high-pressure dissolved air water will enter the annular connecting channel 222 through the plurality of input small holes 221. Since the plurality of input small holes 221 and the annular connecting channel 222 are interconnected, the high-pressure dissolved air water entering the plurality of annular connecting channels 222 will converge in the annular connecting channel 222. Further, the high-pressure dissolved air water gathered in the annular connecting channel 222 will pass through the tapered channel 223 and continue to move. Since the tapered channel 223 is connected to the annular connecting channel 222, the high-pressure dissolved air water will continue to move. The entire conical ring at one end of the conical channel has the largest diameter, and the closer the conical channel 223 is to the output hole 224, the conical ring gradually shrinks, so that the conical ring diameter at the connection with the output holes 224 is the smallest. As a result, when the high-pressure dissolved air water moves through the conical channel 223, due to the spiral action of the conical channel 223, the high-pressure dissolved air water will be subjected to centrifugal force and shear force, thereby further shearing the small bubbles precipitated in the conical channel 223, making them smaller. At the same time, the merging of bubbles is suppressed, thereby improving the treatment effect during slag removal.

[0080] At the same time, since the diameter of the channel wall where the tapered channel 223 connects to the annular connecting channel 222 is the largest, and as the tapered channel 223 shrinks, the diameter of the channel wall also gradually shrinks, and the diameter of the channel wall where the output hole 224 is connected is the smallest, the passage of the high-pressure dissolved air water gradually decreases as it approaches the output hole 224, so that the water flow velocity of the high-pressure dissolved air water gradually increases, and the pressure gradually decreases, so that the high-pressure dissolved air water is stable during the pressure release process, and the state of reducing the water flow is more stable, reducing the uneven bubble precipitation caused by local vortex or pressure fluctuation. At the same time, the stable pressure release process can also reduce the water flow impact of the high-pressure dissolved air water during output, prolong the residence time and precipitation process of the dissolved air water, and reduce the gas waste caused by insufficient precipitation;

[0081] The support assembly 31 includes a clean water return pipe 311 fixedly connected to the outer wall of the high-pressure dissolved air tank 115, an inclined plate 312 fixedly connected to the inner wall of the shell 13, a clean water partition 313 fixedly connected to the inner wall of the shell 13, and a clean water output port 314 opened on the inner wall of the shell 13.

[0082] The dissolved air water reaches the interior of the pressure releaser housing 122 through the output hole 224 and is then output through the output pipe 123, where it mixes with the demulsifier and sewage mixture. Under the action of tiny bubbles precipitated from the dissolved air water, the tiny bubbles are adsorbed or embedded in the impurities such as demulsified flocs in the mixture through van der Waals forces, surface tension, etc., forming a complex with a density less than that of water. At this time, the dissolved air water and the mixture reach the separation chamber between the separation chamber partition 114 and the clean water partition 313. At this time, the complex floats to the water surface due to buoyancy during the flow process, forming a scum layer. At this time, the drive motor in the scraper device 14 drives the scraper to scrape the scum layer on the surface to the scum notch 16.

[0083] The limiting assembly 32 includes a connecting shaft 321 rotatably connected to the inner wall of the clean water partition 313 , a torsion spring 322 sleeved on the outer wall of the connecting shaft 321 , and a one-way plate 323 fixedly connected to the outer wall of the connecting shaft 321 .

[0084] When the device starts to operate, the liquid level in the separation chamber gradually rises. If the clean water outlet is directly opened at this time, some scum will enter the clean water pipe along with the clean water, which will then contaminate the treated clean water and affect the treatment effect. In the process of gradually rising liquid level, due to the presence of the torsion spring 322 and the middle part of the torsion spring 322 restricting the movement of the one-way plate 323, the two ends of the torsion spring 322 are tightly attached to the outer wall of the clean water partition 313, so that the liquid cannot leave the separation chamber during the rising process of the liquid level in the separation chamber. As the liquid level continues to rise, the pressure on the one-way plate 323 gradually increases. When the pressure on the one-way plate 323 reaches a certain limit and exceeds the pressure of the torsion spring 322 on the one-way plate 323, the one-way plate 323 will rotate around the connection with the connecting shaft 321, so that the clean water can flow into the clean water through the one-way plate 323 and be discharged through the clean water outlet 314. At the same time, a part of the clean water enters the high-pressure dissolved air tank 115 through the clean water return pipe 311 to produce high-pressure dissolved air water.

[0085] A method for using an oil and gas field highly emulsified wastewater treatment device comprises the following steps:

[0086] S1: Input sewage and demulsifier: Input sewage and demulsifier into the device through sewage input port 111 and demulsifier input port 112;

[0087] S2: Input high-pressure dissolved air water: Use the high-pressure dissolved air tank 115 to input the high-pressure dissolved air water into the device through the high-pressure dissolved air liquid pipeline 116.

[0088] A specific application of this embodiment is as follows: when in use, the entire device is first placed in a desired location. Then, the sewage to be treated is fed into the device through the sewage inlet 111. At the same time, the demulsifier is fed into the device through the demulsifier inlet 112. The sewage and demulsifier are fully mixed and then enter the mixing chamber through the mixed liquid channel 113. At this time, the high-pressure dissolved air tank 115 is opened, and the high-pressure dissolved air water in the high-pressure dissolved air tank 115 is transported to the connector 121 through the high-pressure dissolved air liquid pipeline 116.

[0089] When the high-pressure dissolved air water is not output, due to the presence of the return spring 213, the sliding block 212 is tightly fitted with the outer wall of the bottom of the sliding block 212 and the outer wall of the limiting block 211 under the action of the elastic potential energy of the return spring 213. When the high-pressure dissolved air water reaches the contact point between the limiting block 211 and the sliding block 212, the high-pressure dissolved air water pushes the sliding block 212 toward the pressure release device housing 122, thereby causing the return spring 213 to be compressed. At the same time, since the sliding block 212 begins to move away from the limiting block 211 at this time, the high-pressure dissolved air water can begin to be output through the inside of the sliding block 212. Since the high-pressure dissolved air water output from the high-pressure dissolved air tank 115 will be affected by other factors such as the pipeline, the pressure The generated fluctuations will cause the supersaturated gas in the high-pressure dissolved air water to precipitate in advance, resulting in unsatisfactory subsequent slag removal effect. At this time, when the pressure of the high-pressure dissolved air water is reduced due to various factors, the pressure of the dissolved air water on the sliding block 212 will be reduced. At this time, under the action of the return spring 213, the sliding block 212 will be moved close to the limiting block 211, thereby reducing the gap between the limiting block 211 and the sliding block 212. Furthermore, when the delivery gap is reduced, the output of the dissolved air water is reduced. After the flow rate is reduced, the flow rate of the dissolved air water in the releaser and the front pipe is slowed down, the impact energy of the pressure fluctuation is partially buffered, and the gas precipitation process is smoother, thereby reducing part of the lost dissolved air, thereby reducing the impact on the subsequent slag removal.

[0090] When the high-pressure dissolved air water reaches the input small hole 221 of the sliding block 212, the high-pressure dissolved air water will enter the annular connecting channel 222 through the plurality of input small holes 221. Since the plurality of input small holes 221 and the annular connecting channel 222 are interconnected, the high-pressure dissolved air water entering the plurality of annular connecting channels 222 will converge in the annular connecting channel 222. Further, the high-pressure dissolved air water gathered in the annular connecting channel 222 will pass through the tapered channel 223 and continue to move. Since the tapered channel 223 is connected to the annular connecting channel 222, the high-pressure dissolved air water will continue to move. The entire conical ring at one end of the conical channel has the largest diameter, and the closer the conical channel 223 is to the output hole 224, the conical ring gradually shrinks, so that the conical ring diameter at the connection with the output holes 224 is the smallest. As a result, when the high-pressure dissolved air water moves through the conical channel 223, due to the spiral action of the conical channel 223, the high-pressure dissolved air water will be subjected to centrifugal force and shear force, thereby further shearing the small bubbles precipitated in the conical channel 223, making them smaller. At the same time, the merging of bubbles is suppressed, thereby improving the treatment effect during slag removal.

[0091] At the same time, since the diameter of the channel wall where the tapered channel 223 connects to the annular connecting channel 222 is the largest, and as the tapered channel 223 shrinks, the diameter of the channel wall also gradually shrinks, and the diameter of the channel wall where the output hole 224 is connected is the smallest, the passage of the high-pressure dissolved air water gradually decreases as it approaches the output hole 224, so that the water flow velocity of the high-pressure dissolved air water gradually increases, and the pressure gradually decreases, so that the high-pressure dissolved air water is stable during the pressure release process, and the state of reducing the water flow is more stable, reducing the uneven bubble precipitation caused by local vortex or pressure fluctuation. At the same time, the stable pressure release process can also reduce the water flow impact of the high-pressure dissolved air water during output, prolong the residence time and precipitation process of the dissolved air water, and reduce the gas waste caused by insufficient precipitation;

[0092] The dissolved air water reaches the interior of the pressure releaser housing 122 through the output hole 224 and is then output through the output pipe 123, where it mixes with the demulsifier and sewage mixture. Under the action of tiny bubbles precipitated from the dissolved air water, the tiny bubbles are adsorbed or embedded in the impurities such as demulsified flocs in the mixture through van der Waals forces, surface tension, etc., forming a complex with a density less than that of water. At this time, the dissolved air water and the mixture reach the separation chamber between the separation chamber partition 114 and the clean water partition 313. At this time, the complex floats to the water surface due to buoyancy during the flow process, forming a scum layer. At this time, the drive motor in the scraper device 14 drives the scraper to scrape the scum layer on the surface to the scum notch 16.

[0093] When the device starts to operate, the liquid level in the separation chamber gradually rises. If the clean water outlet is directly opened at this time, some scum will enter the clean water pipe along with the clean water, thereby contaminating the treated clean water and affecting the treatment effect. In the process of gradually rising liquid level, due to the presence of the torsion spring 322 and the middle part of the torsion spring 322 restricting the movement of the one-way plate 323, the two ends of the torsion spring 322 are tightly attached to the outer wall of the clean water partition 313, so that the liquid cannot leave the separation chamber during the rising process of the liquid level in the separation chamber. As the liquid level continues to rise, the pressure on the one-way plate 323 gradually increases. When the pressure on the one-way plate 323 reaches a certain limit and exceeds the pressure of the torsion spring 322 on the one-way plate 323, the one-way plate 323 will rotate around the connection with the connecting shaft 321, thereby allowing clean water to flow into the clean water through the one-way plate 323 and be discharged through the clean water outlet 314. At the same time, a part of the clean water enters the high-pressure dissolved air tank 115 through the clean water return pipe 311 to produce high-pressure dissolved air water.

[0094] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An oil and gas field highly emulsified wastewater treatment device, comprising a housing (13), a scraping device (14) fixedly connected to the outer wall of the housing (13), a mud outlet (15) fixedly connected to the outer wall of the housing (13), and a scum notch (16) fixedly connected to the inner wall of the housing (13), characterized in that: Also includes: A gas release mechanism (1), wherein the outer wall of the gas release mechanism (1) is fixedly connected to the inner wall of the housing (13), and the gas release mechanism (1) is used to release the pressure of high-pressure dissolved air water; A pressure stabilizing mechanism (2), wherein the outer wall of the pressure stabilizing mechanism (2) is fixedly connected to the inner wall of the gas release mechanism (1), and the pressure stabilizing mechanism (2) is used to stabilize the high-pressure dissolved gas pressure; A limiting mechanism (3), wherein the outer wall of the limiting mechanism (3) is fixedly connected to the inner wall of the outer shell (13), and the limiting mechanism (3) is used to limit the output of clean water; A sewage inlet (111) is fixedly connected to the inner wall of the shell (13), a demulsifier inlet (112) is fixedly connected to the inner wall of the shell (13), a mixed liquid channel (113) is opened on the inner wall of the shell (13), a separation chamber partition (114) is fixedly connected to the inner wall of the shell (13), a high-pressure dissolved air tank (115) is fixedly connected to the outer wall of the shell (13), and a high-pressure dissolved air liquid pipeline (116) is fixedly connected to the outer wall of the high-pressure dissolved air tank (115).

2. The oil and gas field highly emulsified wastewater treatment device according to claim 1, characterized in that: The gas release mechanism (1) comprises: A gas release component (12), wherein the outer wall of the gas release component (12) is fixedly connected to the outer wall of the high-pressure gas solution pipeline (116).

3. The oil and gas field highly emulsified wastewater treatment device according to claim 2, characterized in that: The voltage stabilizing mechanism (2) comprises: A voltage stabilizing component (21), wherein the outer wall of the voltage stabilizing component (21) is fixedly connected to the inner wall of the gas release component (12); An output component (22) is provided on the outer wall of the voltage stabilizing component (21).

4. The oil and gas field highly emulsified wastewater treatment device according to claim 3, characterized in that: The limiting mechanism (3) comprises: A support assembly (31), wherein the outer wall of the support assembly (31) is fixedly connected to the outer wall of the high-pressure dissolved gas tank (115); A limiting component (32), wherein the outer wall of the limiting component (32) is rotatably connected to the inner wall of the supporting component (31).

5. The oil and gas field highly emulsified wastewater treatment device according to claim 4, characterized in that: The gas release assembly (12) comprises two connectors (121) fixedly connected to the outer wall of the high-pressure gas solution pipeline (116); a pressure releaser housing (122) is fixedly connected to the outer wall of the connector (121); and a plurality of output pipes (123) are fixedly connected to the inner wall of the pressure releaser housing (122).

6. The oil and gas field highly emulsified wastewater treatment device according to claim 5, characterized in that: The voltage stabilizing assembly (21) includes a limiting block (211) fixedly connected to the inner wall of the connector (121), a sliding block (212) slidably connected to the inner wall of the pressure release housing (122), and a return spring (213) fixedly connected to the top outer wall of the sliding block (212); The outer wall of one end of the return spring (213) away from the sliding block (212) is fixedly connected to the inner wall of the pressure release device housing (122).

7. The oil and gas field highly emulsified wastewater treatment device according to claim 6, characterized in that: The output assembly (22) includes a plurality of input holes (221) formed on the outer wall of the bottom of the sliding block (212), an annular connecting channel (222) formed on the inner wall of the sliding block (212), a tapered channel (223) formed on the inner wall of the sliding block (212), and a plurality of output holes (224) formed on the inner wall of the sliding block (212); The annular connecting channel (222) is in communication with a plurality of input holes (221), the tapered channel (223) is in communication with the annular connecting channel (222), and one end of the tapered channel (223) away from the annular connecting channel (222) is in communication with a plurality of output holes (224).

8. The oil and gas field highly emulsified wastewater treatment device according to claim 7, characterized in that: The support assembly (31) comprises a clean water return pipe (311) fixedly connected to the outer wall of the high-pressure dissolved gas tank (115); an inclined plate (312) fixedly connected to the inner wall of the housing (13); a clean water partition (313) fixedly connected to the inner wall of the housing (13); and a clean water outlet (314) is provided on the inner wall of the housing (13).

9. The oil and gas field highly emulsified wastewater treatment device according to claim 8, characterized in that: The limiting assembly (32) comprises a connecting shaft (321) rotatably connected to the inner wall of the clean water partition (313), a torsion spring (322) sleeved on the outer wall of the connecting shaft (321), and a one-way plate (323) fixedly connected to the outer wall of the connecting shaft (321).

10. An oil and gas field highly emulsified wastewater treatment device and its use method, using the oil and gas field highly emulsified wastewater treatment device according to claim 9, characterized in that: The following steps are included: S1: Mixing sewage and demulsifier: The sewage and demulsifier are input into the device through the sewage input port (111) and the demulsifier input port (112); S2: Input high-pressure dissolved air water: Use a high-pressure dissolved air tank (115) to input high-pressure dissolved air water into the device through a high-pressure dissolved air liquid pipeline (116).

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