Water quality filtering device for water injection station

Abstract

The utility model discloses a water quality filtering device and a filtering tank for a water injection station. And the impurity filter screen is arranged in the filter tank, is connected with the inner wall of the filter tank in an inserting manner and is used for filtering particle suspended matters in water. The first filter is inserted into the filtering tank, is positioned on one side of the impurity filter screen, is parallel to the impurity filter screen, has a preset distance with the impurity filter screen, and is used for filtering saprophytic bacteria in water through an upper-inlet and lower-outlet filtering structure. The second filter is arranged in the filtering tank, is positioned at the downstream of the first filter, is inserted into the inner wall of the filtering tank, and is used for filtering iron bacteria in water through an upper-inlet and lower-outlet structure. Large-particle suspended matters in water are filtered out through the impurity filter screen, so that the first filter and the second filter are prevented from being blocked. The first filter and the second filter are used for continuously filtering twice in a top-inlet and bottom-outlet manner in sequence to respectively remove saprophytic bacteria and iron bacteria in water, so that the water is filtered to meet the requirements of compatibility with oil-layer water and oil-layer water, and purified water meeting the requirements is conveyed to a water injection well.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality filtering of water injection stations, in particular to a water quality filtering device of a water injection station. Background Art

[0002] The water injection station of an oil field is the pre-pressurization system of the injection well, which delivers purified water that meets the injection requirements to the injection well.

[0003] The main task of the existing water injection station is to increase the pressure of the qualified water source after treatment to meet the requirements of water injection pressure and injection volume, so that the water can be injected into the oil layer of the injection well. It is mainly composed of qualified water source water pipes, water storage tanks, high-pressure water injection pumps, water pipes, etc. Among them, the high-pressure multi-stage centrifugal pump is the most important equipment of the water injection station. However, in the long-term production line of the oil field, the equipment of the water injection station is often used for too long, and rust and corrosion will gradually appear in the water storage tanks, water pipes, water injection pump rooms, pump units and other equipment, which will induce the emergence of saprophytes, iron bacteria and other microorganisms, which will reduce the water quality. Therefore, it is still necessary to filter the water quality in the water injection station before injecting water, and a set of equipment is needed to filter the purified water.

[0004] Therefore, the water must be filtered and purified through a water filtration device before it is delivered to the injection well. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a water quality filtering device for a water injection station, which filters the water in the filter tank through an impurity filter screen, a first filter and a second filter.

[0006] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0007] A water quality filtering device for a water injection station, comprising:

[0008] Filter tank.

[0009] The impurity filter is arranged in the filter tank and plugged into the inner wall of the filter tank to filter suspended particles in the water.

[0010] The first filter is inserted in the filter tank, located on one side of the impurity filter screen, parallel to the impurity filter screen, and at a preset distance, and is used to filter saprophytes in the water through a top-in and bottom-out filtering structure.

[0011] The second filter is arranged in the filter tank, is located downstream of the first filter, and is plugged into the inner wall of the filter tank to filter iron bacteria in the water through a top-in and bottom-out structure.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] The large suspended particles in the water are first filtered out through the impurity filter to avoid clogging the first filter and the second filter, thus achieving the purpose of preliminary filtration. Then the first filter and the second filter are filtered twice in succession in the way of upper inlet and lower outlet, respectively removing saprophytes and iron bacteria in the water, thus filtering the water to meet the requirements of compatibility with reservoir water and oil layer, and delivering purified water that meets the requirements to the injection well.

[0014] More preferably, the first filter comprises:

[0015] The first filter tank is arranged in the filter tank, plugged with the inner wall of the filter tank, and has a preset distance from the impurity filter screen, so as to establish a liquid level with the impurity filter screen.

[0016] The first inlet filter screen is arranged at the upper part of the first filter tank, located at a side close to the impurity filter screen, plugged with the first filter tank, and used for filtering saprophytes in water from the upper part of the first filter tank.

[0017] The first filter screen is arranged at the lower part of the first filter tank, located at a side close to the second filter, and is used for filtering the saprophytes in the water entering the first filter tank again.

[0018] By adopting the above technical scheme, water enters from the first inlet filter screen and the saprophytes are removed for the first time. There is a height difference between the first inlet filter screen and the first outlet filter screen. The water in the height difference space of the first filter tank is filtered for the second time by the first outlet filter screen to remove the remaining saprophytes again. The first filter composed of the first filter tank, the first inlet filter screen and the first outlet filter screen is used to complete the removal of saprophytes in the water.

[0019] More preferably, the second filter comprises:

[0020] The second filter tank is arranged on one side of the first filter tank, plugged into the inner wall of the filter tank, and parallel to the first filter tank.

[0021] The second inlet filter screen is arranged at the upper part of the second filter tank and is plugged into the second filter tank on the side close to the first inlet filter screen for filtering iron bacteria in water from the upper part of the second filter tank.

[0022] The second filter screen is arranged at the lower outlet of the second filter tank, located at a side close to the inner wall of the filter tank, and plugged into the second filter tank for filtering iron bacteria in the water again.

[0023] The above technical solution is adopted, which is the same as the principle of the first filter. The water after the saprophytes have been filtered out enters the second filter tank from the second inlet filter. The second inlet filter first removes the iron bacteria for the first time, and then removes the remaining iron bacteria again from the second outlet filter, completing the filtration of the iron bacteria in the water, thereby preparing purified water that meets the water injection requirements.

[0024] More preferably, the filter tank is further provided with:

[0025] The detection element is installed on the inner wall of the filter tank, located between the second filter tank and the filter tank, and is used to detect the number of suspended matter, saprophytes and iron bacteria in the filtered water.

[0026] The aerator is located between the impurity filter screen and the first filter tank and is connected to the filter tank.

[0027] By adopting the above technical solution, the water quality is detected at the upper outlet of the filter tank through the detection element, providing an accurate judgment basis for the water quality detection before water injection.

[0028] Further optimization is that the impurity filter is selected as a multi-layer filter, and the mesh size of each layer of the filter is different.

[0029] By adopting the above technical solution, a filter screen combination with an extremely poor performance is formed, thereby improving the filtering effect.

[0030] Further optimization is that the middle part of the bottom surface of the first inlet filter is plugged into the upper top surface of the first filter tank.

[0031] By adopting the above technical solution, the first filter inlet socket on the first filter tank has the characteristics of stable and firm structure, and can withstand the pressure of a large amount of water, thereby ensuring that the first filter tank stores a large amount of water.

[0032] Further optimization is that the middle part of the top surface of the first outlet filter is plugged into the lower bottom surface of the first filter tank.

[0033] By adopting the above technical solution, a firm plug-in structure is formed between the first outlet filter and the first filter tank, which is sufficient to withstand the impact force of water coming down from the first inlet filter, ensuring secondary filtration and removal of floating bacteria in the water.

[0034] In a further optimization, the second filter is the same as the first filter.

[0035] By adopting the above technical solution, the second filter has the structural characteristics of the first filter, and can store a large amount of water and withstand the pressure and impact of water.

[0036] Further optimization is that the mesh number of the second inlet filter is greater than the mesh number of the first inlet filter, and the mesh number of the second outlet filter is greater than the mesh number of the first outlet filter.

[0037] The above technical solution can not only meet the requirement of removing iron bacteria, but also filter out impurities with smaller diameters in the water, further improving the water quality of purified water. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of this embodiment.

[0039] Figure 2 Schematic diagram of the structure of the impurity filter in this embodiment.

[0040] Figure 3 Schematic diagram of the structure of the first filter in this embodiment.

[0041] Figure 4 Schematic diagram of the structure of the second filter in this embodiment.

[0042] Figure markings: 1-filter tank; 2-impurity filter screen; 3-first filter; 31-first filter tank; 32-first inlet filter screen; 33-first outlet filter screen; 4-second filter; 41-second filter tank; 42-second inlet filter screen; 43-third inlet filter screen; 5-detection element; 6-aerator; 7-water pipe. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-Figure 4 The utility model is further introduced in detail.

[0044] A water quality filtering device for a water injection station, such as Figure 1 As shown, including:

[0045] Filter tank 1.

[0046] The impurity filter 2 is arranged in the filter tank 1 and plugged into the inner wall of the filter tank 1 to filter suspended particles in the water.

[0047] The first filter 3 is inserted into the filter tank 1, located on one side of the impurity filter screen 2, parallel to the impurity filter screen 2, and at a preset distance, and is used to filter saprophytes in the water through a top-in and bottom-out filtering structure.

[0048] The second filter 4 is arranged in the filter tank 1, is located downstream of the first filter 3, and is plugged into the inner wall of the filter tank 1, and is used to filter iron bacteria in the water through a top-in and bottom-out structure.

[0049] The large suspended particles in the water are first filtered out through the impurity filter 2 to avoid clogging the first filter 3 and the second filter 4, thereby achieving the purpose of preliminary filtration. Then the first filter 3 and the second filter 4 are filtered twice in succession in the manner of upper inlet and lower outlet, respectively removing saprophytes and iron bacteria in the water, thereby filtering the water to meet the requirements of compatibility with oil layer water and oil layer, and delivering purified water that meets the requirements to the injection well.

[0050] Specifically, Figure 1 and Figure 3 As shown, the first filter 3 in this embodiment includes:

[0051] The first filter tank 31 is disposed in the filter tank 1 , plugged into the inner wall of the filter tank 1 , and has a preset distance from the impurity filter screen 2 , so as to establish a liquid level with the impurity filter screen 2 .

[0052] The first inlet filter screen 32 is disposed at the upper part of the first filter tank 31 , located at a side close to the impurity filter screen 2 , and plugged into the first filter tank 31 , for filtering saprophytes in water from the upper part of the first filter tank 31 .

[0053] The first filter screen 33 is disposed at the lower part of the first filter tank 31 and located on a side close to the second filter 4 , and is used to filter the saprophytes in the water entering the first filter tank 31 again.

[0054] Water enters from the first inlet filter 32 to remove saprophytes for the first time. There is a height difference between the first inlet filter 32 and the first outlet filter 33. The water in the height difference space of the first filter tank 31 is filtered for the second time by the first outlet filter 33 to remove the remaining saprophytes again. The first filter 3 composed of the first filter tank 31, the first inlet filter 32 and the first outlet filter 33 is used to complete the filtration of saprophytes in the water.

[0055] Specifically, Figure 1 and Figure 4 As shown, the second filter 4 in this embodiment includes:

[0056] The second filter tank 41 is disposed on one side of the first filter tank 31 , plugged into the inner wall of the filter tank 1 , and parallel to the first filter tank 31 .

[0057] The second inlet filter screen 42 is disposed at the upper portion of the second filter tank 41 and is plugged into the second filter tank 41 on a side close to the first inlet filter screen 32 , so as to filter iron bacteria in water from the upper portion of the second filter tank 41 .

[0058] The second filter screen is arranged at the lower outlet of the second filter tank 41, located at a side close to the inner wall of the filter tank 1, and plugged into the second filter tank 1 for filtering iron bacteria in the water again.

[0059] The principle is the same as that of the first filter 3. The water after the saprophytes have been filtered out enters the second filter tank 41 from the second inlet filter 42. The second inlet filter 42 first removes the iron bacteria for the first time, and then removes the remaining iron bacteria again from the second outlet filter, completing the filtration of the iron bacteria in the water, thereby preparing purified water that meets the water injection requirements.

[0060] Specifically, Figure 1 and Figure 2 As shown, the filter tank 1 in this embodiment is also provided with:

[0061] The detection element 5 is installed on the inner wall of the filter tank 1 and is located between the second filter tank 41 and the filter tank 1, and is used to detect the amount of suspended matter, saprophytes and iron bacteria in the filtered water.

[0062] The aerator 6 is located between the impurity filter screen 2 and the first filter tank 31 and is connected to the filter tank 1 .

[0063] The water quality is detected at the upper outlet of the filter tank 1 by the detection element 5, providing an accurate judgment basis for the water quality detection before water injection.

[0064] Specifically, Figure 1 and Figure 2 As shown, the impurity filter screen 2 in this embodiment is selected as a multi-layer filter screen, and the mesh size of each layer of the filter screen is different, thereby forming a filter screen combination with extreme differences and improving the filtering effect.

[0065] Specifically, Figure 1 and Figure 3 As shown, the middle part of the bottom surface of the first inlet filter 32 in this embodiment is plugged into the upper top surface of the first filter tank 31, so that the first inlet filter 32 socket is on the first filter tank 31, which has the characteristics of stable and firm structure and can withstand the pressure of a large amount of water, thereby ensuring that the first filter tank 31 stores a large amount of water.

[0066] Specifically, Figure 1 and Figure 3 As shown, the middle part of the top surface of the first outlet filter 33 in this embodiment is plugged into the lower bottom surface of the first filter tank 31, so that a firm plug-in structure is formed between the first outlet filter 33 and the first filter tank 31, which is sufficient to withstand the impact force of water coming down from the first inlet filter 32, ensuring secondary filtration and removal of floating bacteria in the water.

[0067] Specifically, Figure 1 and Figure 2 As shown, the second filter 4 in this embodiment is the same as the first filter 3, so that the second filter 4 has the structural characteristics of the first filter and can store a large amount of water and withstand the pressure and impact of water.

[0068] Specifically, Figure 1 and Figure 2 As shown, the mesh number of the second inlet filter 42 in this embodiment is greater than the mesh number of the first inlet filter 32, and the mesh number of the second outlet filter is greater than the mesh number of the first outlet filter 33, which not only meets the requirement of removing iron bacteria, but also can filter out impurities with smaller diameters in the water, further improving the water quality of the purified water.

[0069] Please combine Figure 1-Figure 4 The water filtration principle and process of this embodiment are described as follows:

[0070] After water enters the filter tank 1 from the water pipe 7, it encounters the impurity filter 2. The impurity filter 2 blocks the suspended particles in the water from passing through it. The suspended particles gradually settle in the filter tank 1 or adhere to the impurity filter 2. After passing through the impurity filter 2, the water enters the space between the first filter tank 31 and the impurity filter 2, and gradually establishes the liquid level. When the liquid level is higher than the connection between the first filter tank 31 and the first inlet filter 32, the water flows from the first inlet filter 32 to the first filter tank 31. During this period, the first inlet filter 32 filters out the saprophytes in the water. Then, after the water passes through the first outlet filter 33, it enters the space between the second filter tank 41 and the first filter tank 31, and gradually establishes the liquid level. During this period, the saprophytes are filtered out again by the first outlet filter 33, and the remaining water containing iron bacteria passes through the second inlet filter 42 and enters the second filter tank 41 as the liquid level rises, and at the same time, the iron bacteria are filtered out for the first time by the second inlet filter 42. The water entering the second filter tank 41 passes through the second filter screen 43, and the iron bacteria are removed again by the second filter screen, and then enters the space between the second filter tank 41 and the filter tank 1, and then outputs from the outlet of the filter tank 1 to the water pump of the subsequent section. The aerator 6 inputs oxygen into the filter tank 1 and stirs the water so that the saprophytes are fully filtered. The water quality of the filtered water is detected in real time by the detection element 5 to ensure that the water meets the water injection requirements.

[0071] This specific embodiment is merely an explanation of the utility model, and it is not a limitation of the utility model. After reading this specification, those skilled in the art can make non-creative modifications to the embodiment as needed, but as long as it is within the protection scope of the utility model, it is protected by the patent law.

Claims

1. A water quality filtration device for a water injection station, characterized in that: include: Filter tank (1); An impurity filter (2) is arranged in the filter tank (1) and plugged into the inner wall of the filter tank (1) to filter suspended particles in water; A first filter (3) is inserted into the filter tank (1), is located on one side of the impurity filter screen (2), is parallel to the impurity filter screen (2), and is at a preset distance, and is used to filter saprophytes in water through a top-in, bottom-out filtering structure; The second filter (4) is arranged in the filter tank (1), is located downstream of the first filter (3), and is plugged into the inner wall of the filter tank (1), and is used to filter iron bacteria in the water through a top-in and bottom-out structure.

2. The water quality filtering device for a water injection station according to claim 1, characterized in that: The first filter (3) comprises: A first filter tank (31) is arranged in the filter tank (1), plugged into the inner wall of the filter tank (1), and has a preset distance from the impurity filter screen (2), and is used to establish a liquid level with the impurity filter screen (2); A first inlet filter screen (32) is arranged at the upper part of the first filter tank (31), located at a side close to the impurity filter screen (2), plugged into the first filter tank (31), and used to filter saprophytes in water from the upper part of the first filter tank (31); The first outlet filter (33) is arranged at the lower part of the first filter tank (31) and is located on a side close to the second filter (4), and is used to filter the saprophytes in the water entering the first filter tank (31) again.

3. The water quality filtering device for a water injection station according to claim 2, characterized in that: The second filter (4) comprises: A second filter tank (41) is arranged on one side of the first filter tank (31), plugged into the inner wall of the filter tank (1), and parallel to the first filter tank (31); A second inlet filter screen (42) is arranged at the upper part of the second filter tank (41), and is located on a side close to the first inlet filter screen (32), and is plugged into the second filter tank (41), and is used to filter iron bacteria in water from the upper part of the second filter tank (41); The second filter screen (43) is arranged at the lower outlet of the second filter tank (41), located on a side close to the inner wall of the filter tank (1), plugged into the filter tank (1), and used for filtering iron bacteria in water again.

4. The water quality filtering device for a water injection station according to claim 3, characterized in that: The filter tank (1) is also provided with: A detection element (5) is installed on the inner wall of the filter tank (1), located between the second filter tank and the filter tank (1), and is used to detect the amount of suspended matter, saprophytes and iron bacteria in the filtered water; An aerator (6) is located between the impurity filter screen (2) and the first filter tank (31), and is connected to the filter tank (1).

5. The water quality filtering device for a water injection station according to claim 1, characterized in that: The impurity filter (2) is selected as a multi-layer filter, and the mesh size of each layer of the filter is different.

6. The water quality filtering device for a water injection station according to claim 2, characterized in that: The middle portion of the bottom surface of the first inlet filter screen (32) is plugged into the top surface of the upper portion of the first filter tank (31).

7. The water quality filtering device for a water injection station according to claim 2, characterized in that: The middle portion of the top surface of the first outlet filter (33) is plugged into the lower bottom surface of the first filter tank (31).

8. The water quality filtering device for a water injection station according to claim 1, characterized in that: The second filter (4) is identical to the first filter (3).

9. The water quality filtering device for a water injection station according to claim 4, characterized in that: The mesh number of the second inlet filter (42) is greater than the mesh number of the first inlet filter (32), and the mesh number of the second outlet filter (43) is greater than the mesh number of the first outlet filter (33).

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