Microbial water treatment scale removal device

Abstract

The present application relates to oil and gas field microbial water treatment technical field, specifically, it relates to a kind of microbial water treatment scale removal device;Including reaction device shell, the reaction device shell is equipped with water inlet and water outlet, the reaction device shell is divided into first aeration zone, electric descaling area and second aeration zone three parts, the first aeration zone, the electric descaling area and the second aeration zone are sequentially arranged from the water inlet end to the water outlet end, the electric descaling area inside is equipped with at least one electrode group, and the second aeration zone inside is equipped with at least one microbial biofilm;First through the first aeration zone to the reducing ion in liquid oxidation, deposition to the lower electric descaling area, electric descaling area is adsorbed to the scale-forming ion in liquid, so that effectively reduce the scale-forming ion amount in liquid through the surface of microbial biofilm, effectively avoid microbial biofilm due to surface fouling and affect water treatment effect, effectively improve water treatment quality, ensure that water injection water quality is stable.

Description

Technical Field

[0001] This invention relates to the field of microbial water treatment technology in oil and gas fields, and more specifically, to a microbial water treatment descaling device. Background Technology

[0002] After an oil and gas field is put into development, as the extraction time increases, the energy of the oil reservoir itself will be continuously consumed, causing the reservoir pressure to drop continuously. This leads to significant degassing of the underground crude oil, increased viscosity, and a substantial reduction in well production, sometimes even resulting in the cessation of production and leaving a large amount of unrecoverable dead oil underground. To compensate for the underground deficit caused by crude oil extraction, maintain or increase reservoir pressure, achieve high and stable production in the oil and gas field, and obtain a higher recovery rate, water injection is necessary. This typically involves using water injection equipment to inject qualified water from injection wells into the oil reservoir. The quality of the injected water determines the reservoir's development effectiveness. "Good water injection, sufficient water injection, and precise water injection" has become a consensus in current oil and gas field development management. Therefore, improving the quality of injected water is a crucial issue that oil and gas field development managers must address.

[0003] Currently, in the field of water treatment technology, microbial water treatment technology is increasingly valued by oil and gas field managers due to its characteristics such as low sludge production, water that is not easily deteriorated, and low treatment costs. At present, most oil and gas fields in China adopt microbial water treatment processes.

[0004] The prior art CN1966422A discloses a water treatment device utilizing solar energy and microorganisms, including a power generation unit, a treated water supply unit, and a water treatment unit. The treated water supply unit includes a chamber and multiple nozzles. The water treatment unit is located inside the chamber and includes multiple biofilm filters. The nozzles are positioned above the multiple biofilm filters, and some nozzles are connected to a pump located inside the chamber. The power generation unit provides power to the pump and uses solar energy to generate energy. The water sprayed from the nozzles falls onto the biofilm filters, where it is decomposed and treated. However, when this device is applied to the water treatment process for oil and gas field injection, due to the principle of environmental protection, all oily liquids enter the treatment station for water treatment. Therefore, the composition of the incoming liquid at the treatment station is complex, and scale will form on the biofilm filters after long-term use, which will affect the water decomposition effect and the quality of the treated water.

[0005] Therefore, there is an urgent need to provide a microbial water treatment descaling device that can improve water treatment quality and ensure stable injection water quality compared to existing technologies. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a microbial water treatment descaling device.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] A microbial water treatment descaling device includes a reaction device shell, which has an inlet and an outlet. The interior of the reaction device shell is divided into three parts: a first aeration zone, an electro-scaling zone, and a second aeration zone. The first aeration zone, the electro-scaling zone, and the second aeration zone are arranged sequentially from the inlet end to the outlet end. The electro-scaling zone has at least one electrode group, and the second aeration zone has at least one microbial biofilm.

[0009] Furthermore, multiple coils are sleeved on the outer wall of the electrode assembly, and the multiple coils are arranged along the length direction of the electrode assembly. The water inlet is located in the middle of the side wall of the outer shell of the reaction device. Both the coils and the electrode assembly are made of corrosion-resistant materials.

[0010] Furthermore, an isolation layer is provided between the electrode assembly and the outer shell of the reaction device, and the isolation layer is made of a corrosion-resistant material.

[0011] Furthermore, a barrier component is provided between the electro-scaling zone and the second aeration zone, the barrier component being used to block floating matter and sediment.

[0012] Furthermore, the barrier assembly includes an upper weir plate and a lower weir plate, the upper weir plate being fixedly connected to the upper wall inside the outer shell of the reaction device, and the lower weir plate being fixedly connected to the lower wall inside the outer shell of the reaction device.

[0013] Furthermore, both the upper weir plate and the lower weir plate extend in a direction perpendicular to the water flow direction.

[0014] Furthermore, a first aeration device is provided in the first aeration zone, and the first aeration device is located below the first aeration zone.

[0015] Furthermore, the second aeration zone is provided with a second aeration device, which is located below the second aeration zone.

[0016] Furthermore, both the first aeration device and the second aeration device are connected to a controller, which individually controls the flow rate of the first aeration device and the second aeration device.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] (1) The present invention sets up a first aeration zone, an electro-scaling zone and a second aeration zone between the inlet and the outlet, and sets the microbial biofilm inside the second aeration zone. The incoming liquid passes through the first aeration zone and the electro-scaling zone in sequence, first oxidizing the reducing ions in the incoming liquid and depositing them below the electro-scaling zone. The electro-scaling zone adsorbs the scale-forming ions in the incoming liquid, thereby effectively reducing the amount of scale-forming ions in the incoming liquid passing through the surface of the microbial biofilm, effectively avoiding the microbial biofilm from affecting the water treatment effect due to surface scaling, effectively improving the water treatment quality and ensuring the stability of the injected water quality.

[0019] (2) The electrode assembly of the present invention is fitted with a coil, so that after the incoming liquid containing scale passes through the first aeration zone, the tiny scale crystals are attracted by the electrode assembly and collide with the coil to form crystals, which are deposited in the lower part of the electrostatic scale reduction zone. During the water flow, most of the crystals are blocked by the lower weir plate and will not flow with the water flow. This can effectively reduce the content of scale crystals entering the second aeration zone and the scale content at the outlet when treating the incoming liquid with scale. It can also effectively reduce the risk of blockage of the outlet connecting pipe. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Reactor casing; 11. Inlet; 12. Outlet; 2. First aeration zone; 21. First aeration device; 3. Electrostatic descaling zone; 31. Electrode assembly; 32. Coil; 4. Second aeration zone; 41. Second aeration device; 42. Microbial biofilm formation; 5. Upper weir plate; 6. Lower weir plate. Detailed Implementation

[0023] The technical solution of the present invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] Example 1

[0025] like Figure 1As shown, the present invention provides a microbial water treatment descaling device, including a reaction device shell 1. The reaction device shell 1 is provided with an inlet 11 and an outlet 12. The inlet 11 and the outlet 12 are respectively located on the left and right side walls of the reaction device shell 1. The inlet 11 is located at the bottom of one side wall, and the outlet 12 is located in the middle of one side wall. The internal space of the reaction device shell 1 is divided into three parts: a first aeration zone 2, an electro-scaling zone 3, and a second aeration zone 4. The first aeration zone 2, the electro-scaling zone 3, and the second aeration zone 4 are arranged sequentially from the inlet 11 to the outlet 12. The liquid to be treated entering from the inlet 11 passes through the first aeration zone 2, the electro-scaling zone 3, and the second aeration zone 4 in sequence and then flows out from the outlet 12.

[0026] The first aeration zone 2 has a first aeration device 21 on its lower wall, which is positioned corresponding to the inlet 11. The electro-scaling zone 3 has an electrode assembly 31, with its upper end connected to the upper wall of the electro-scaling zone 3 and its lower end connected to the lower wall of the electro-scaling zone 3. The electrode assembly 31 extends in a direction perpendicular to the water flow, and there are multiple electrode assemblies. The electrodes in the electrode assembly 31 are made of corrosion-resistant, non-reactive metal or carbon rods. The second aeration zone 4 has multiple microbial biofilms 42 and a second aeration device 41. The multiple microbial biofilms 42 are fixedly connected to the upper wall of the second aeration zone 4 and are spaced apart. Each microbial biofilm 42 extends in a direction perpendicular to the water flow. The second aeration device 41 is fixedly connected to the lower wall of the second aeration zone 4, and the multiple microbial biofilms 42 are positioned above the second aeration device 41.

[0027] The first aeration device 21 and the second aeration device 41 are respectively connected to a controller. The flow rates of the first aeration device 21 and the second aeration device 41 are adjusted by the controller, and the controller independently controls the flow rates of the first aeration device 21 and the second aeration device 41. The flow rate adjustment range of the first aeration device 21 is 0-500 m³ / h. 3 The flow rate adjustment range of the second aeration device 41 is 0-100m³. 3 /

[0028] An isolation layer is provided between the inner wall of the reaction device shell 1 and the electrode assembly 31. The isolation layer is made of a corrosion-resistant material, preferably a non-metallic material. The isolation layer is provided to prevent the electrode assembly 31 and the inner wall of the reaction device shell 1 from contacting and corroding.

[0029] The working principle of the microbial water treatment descaling device provided in Example 1 is as follows: The incoming liquid to be treated flows into the reaction device from the inlet 11. It first passes through the first aeration zone 2 for aeration, which oxidizes reducing ions such as hydrogen sulfide and ferrous ions in the incoming liquid in advance. Then, the incoming liquid enters the electro-scaling zone 3, where scale-forming ions are adsorbed by the electrode assembly 31. Calcium and magnesium ions in the incoming liquid are adsorbed and deposited on the surface of the electrode assembly. At the same time, the oxidized hydrogen sulfide and ferrous ions are deposited in the electro-scaling zone 3, and then the liquid enters the second aeration zone. 4. Aeration is carried out, and the incoming liquid is treated by microbial biofilm 42. The treated incoming liquid will flow out of the reaction device from the outlet 12, so that the content of ferrous ions in the outflowing water is almost 0 and the sulfur ion is reduced to below 1 mg / L. After the scale ions in the incoming liquid are treated by the electro-scale reduction zone 3, scale will not be generated on the surface of the microbial biofilm 42 in the second aeration zone 4, which effectively improves the water treatment quality, ensures the stability of the injection water quality, and greatly reduces the content of reducing ions in the water flowing out of the outlet 12.

[0030] Example 2

[0031] like Figure 1 As shown, the difference between Embodiment 2 and Embodiment 1 is that: multiple coils 32 are sleeved on the outer wall of each electrode group 31, and the multiple coils 32 are arranged along the length direction of the electrode group 31. Two adjacent coils 32 arranged on the outer wall of the same electrode group 31 are in contact with each other, and the coils 32 arranged between two adjacent electrode groups 31 are not in contact. The coils 32 can be made of non-metallic materials (such as nylon rope) or corrosion-resistant metal materials (such as nickel-containing steel wire). When the materials of the coils 32 and the electrodes in the electrode group 31 are both selected as metal materials, it is preferable to set the electrodes in the electrode group 31 and the coils 32 to be the same metal material, which is more conducive to corrosion prevention.

[0032] The working principle of a microbial water treatment descaling device provided in Example 2 is as follows: The incoming liquid enters the interior of the reaction device through the inlet 11 and is first aerated in the first aeration zone 2. The tiny scale crystals present in the incoming liquid are attracted by the electrode group and collide preferentially with the coil 32 in the electro-descaling zone 3, forming loose crystals that fall to the lower wall of the electro-descaling zone 3. This helps to reduce the outflow of scale crystals in the already scaled incoming liquid, effectively reducing the scale content of the water at the outlet 12, and even reducing the risk of blockage of the connecting pipe at the outlet 12.

[0033] Example 3

[0034] like Figure 1As shown, the difference between Example 3 and Example 1 or Example 2 is that a barrier component is provided between the electro-scaling zone 3 and the second aeration zone 4. The barrier component includes an upper weir plate 5 and a lower weir plate 6. The upper weir plate 5 is fixedly connected to the upper wall inside the outer shell 1 of the reaction device, and the lower weir plate 6 is fixedly connected to the lower wall inside the outer shell 1 of the reaction device. The upper weir plate 5 and the lower weir plate 6 are arranged at intervals, and both the upper weir plate 5 and the lower weir plate 6 extend in a direction perpendicular to the water flow direction. The upper weir plate 5 is used to block floating objects such as floating oil, and the lower weir plate 6 is used to block deposits such as scale crystals and mud.

[0035] The working principle of the microbial water treatment descaling device provided in Example 3 is as follows: After the incoming liquid passes through the aeration operation of the first aeration zone 2, it enters the electro-scaling zone 3. The electro-scaling zone 3 is used to adsorb and deposit scale-forming ions in the incoming liquid. Floating matter such as oil in the incoming liquid is in the upper part of the electro-scaling zone 3, and sediment such as mud in the incoming liquid is deposited in the lower part of the electro-scaling zone 3. After the descaling, the incoming liquid enters the second aeration zone 4 from the electro-scaling zone 3. Floating matter is blocked by the upper weir plate 5, and sediment is blocked by the lower weir plate 6. Floating matter and sediment will not enter the interior of the second aeration zone 4 with the water flow, further improving the water quality of the outflowing water.

[0036] Tiny scale crystals in the incoming liquid will collide with coil 32, forming loose crystals that are deposited below the electrostatic scale reduction zone 3. More than 50% of the crystals will be blocked by the lower weir plate 6 and will not enter the second aeration zone 4 with the water flow, effectively blocking most of the crystals, effectively reducing the scale content of the outlet 12, and also reducing the risk of blockage of the pipe connected to the outlet 12.

[0037] The above specific embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A microbial water treatment descaling device, characterized in that, The device includes a reaction apparatus housing with an inlet and an outlet. The interior of the housing is divided into three sections: a first aeration zone, an electro-scaling zone, and a second aeration zone. These zones are arranged sequentially from the inlet to the outlet. The electro-scaling zone contains at least one electrode assembly, and the second aeration zone contains at least one microbial biofilm. A first aeration device is located below the first aeration zone. The water inlet is located at the lower end of the side wall of the outer shell of the reaction device; The air outlet direction of the first aeration device and the extension direction of the electrode group are perpendicular to the water flow direction.

2. The microbial water treatment descaling device according to claim 1, characterized in that, Multiple coils are sleeved on the outer wall of the electrode assembly, and the multiple coils are arranged along the length of the electrode assembly. The water inlet is located in the middle of the side wall of the outer shell of the reaction device. Both the coils and the electrode assembly are made of corrosion-resistant materials.

3. The microbial water treatment descaling device according to claim 2, characterized in that, An isolation layer is provided between the electrode assembly and the outer shell of the reaction device, and the isolation layer is made of a corrosion-resistant material.

4. The microbial water treatment descaling device according to claim 1, characterized in that, A barrier component is provided between the electrostatic descaling zone and the second aeration zone, the barrier component being used to block floating matter and sediment.

5. A microbial water treatment descaling device according to claim 4, characterized in that, The barrier assembly includes an upper weir plate and a lower weir plate. The upper weir plate is fixedly connected to the upper wall inside the outer shell of the reaction device, and the lower weir plate is fixedly connected to the lower wall inside the outer shell of the reaction device.

6. The microbial water treatment descaling device according to claim 5, characterized in that, Both the upper weir plate and the lower weir plate extend in a direction perpendicular to the water flow direction.

7. A microbial water treatment descaling device according to claim 6, characterized in that, The second aeration zone is equipped with a second aeration device, which is located below the second aeration zone.

8. A microbial water treatment descaling device according to claim 7, characterized in that, Both the first aeration device and the second aeration device are connected to a controller, which controls the flow rate of the first aeration device and the second aeration device individually.

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