Backwash type desulfurization waste liquid filtering device

Abstract

The utility model discloses a backwashing type desulfurization waste liquid filtering device which comprises a support, a treatment tank is installed on the support, a filter screen is arranged in the treatment tank, a liquid inlet pipe is connected to the treatment tank and located below the filter screen, a liquid outlet pipe is connected to the treatment tank and located above the filter screen, and a backwashing assembly is arranged in the treatment tank. The back washing assembly comprises a center rod, the center rod is arranged in the treatment tank and located above the filter screen, an impeller is connected to the center rod, the center rod can drive the impeller to rotate by rotating the center rod, the impeller can drive liquid above the filter screen to flow downwards, and in the downward flowing process of the liquid, the filter screen is not prone to falling off. Liquid is used for backwashing the filter screen, so that impurities blocked on the filter screen are removed, the filter screen does not need to be disassembled for maintenance and cleaning, an excellent filtering effect can be always kept, the maintenance cost is reduced, and the filtering effect is ensured.

Description

Technical Field

[0001] The utility model relates to a backwashing type desulfurization waste liquid filtering device, belonging to the technical field of waste liquid treatment. Background Art

[0002] At present, a large amount of waste liquid is inevitably generated during the desulfurization process, and these waste liquids contain a variety of toxic and harmful substances. If they are discharged directly without treatment, they will cause serious pollution to the water body and the environment. In the existing treatment method, a filter is usually used to filter impurities in the waste liquid to purify the waste liquid. However, the filter will gradually be blocked by filter residues during long-term use, which greatly reduces its filtering effect and may even affect the purification effect of the waste liquid.

[0003] To solve this problem, the traditional approach is to manually dismantle the equipment and clean or replace the filter, which not only increases maintenance costs but also reduces work efficiency.

[0004] In view of the above problems, a backwashing desulfurization waste liquid filtering device is provided. Utility Model Content

[0005] The utility model aims to provide a backwashing desulfurization waste liquid filtering device to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a backwashing desulfurization waste liquid filtering device, comprising a bracket, a processing tank is installed on the bracket, a filter screen for intercepting impurities in the waste liquid is arranged inside the processing tank, a liquid inlet pipe is connected to the processing tank and located below the filter screen, and a liquid outlet pipe is connected to the processing tank and located above the filter screen;

[0007] Among them, a backwash assembly is arranged inside the treatment tank, and the backwash assembly includes a rotatable center rod, which is arranged inside the treatment tank and located above the filter screen. An impeller is connected to the center rod. When the center rod rotates with the impeller, the impeller drives the liquid in the treatment tank to flow downward.

[0008] Preferably, a lifting frame is provided above the bracket to slide up and down, the upper end of the lifting frame is connected to a liquid inlet tank, the position where the liquid outlet pipe is connected to the treatment tank is higher than the bottom of the liquid inlet tank and lower than the top of the liquid inlet tank, the lower end of the liquid inlet tank is connected to a connecting pipe, and the connecting pipe is slidably connected to the end of the liquid inlet pipe, and the sliding connection position between the connecting pipe and the liquid inlet pipe is sealed.

[0009] Preferably, a liquid storage tank is placed on the bracket, and the water outlet of the liquid outlet pipe is inserted into the interior of the liquid storage tank, wherein the water outlet of the liquid outlet pipe is lower than the water outlet of the liquid storage tank, and the water outlet of the liquid outlet pipe is below the liquid level in the liquid storage tank.

[0010] Preferably, the lower end of the central rod passes through the center of the filter screen and extends toward the bottom of the processing tank. The central rod is provided with a plurality of scraping rods below the filter screen, and the scraping rods are attached to the inner wall of the processing tank.

[0011] Preferably, the filter net has a cone shape or a bowl-shaped structure. The cone shape or the bowl-shaped structure increases the surface area of ​​the filter net. The increase in surface area also means that the filter net has more filter holes. More filter holes mean that impurities in the waste liquid have more channels to be intercepted, further improving the filtering effect.

[0012] Preferably, the outer contour of the impeller fits against the inner wall of the treatment tank and the upper surface of the filter screen. Since the outer contour of the impeller fits against the inner wall of the treatment tank, the space of the treatment tank can be fully utilized during rotation to form effective fluid dynamics. This dynamics causes the waste liquid in the treatment tank to be subjected to a strong downward force, thereby achieving efficient downward flow of the waste liquid.

[0013] Preferably, a sewage pipe is connected to the bottom of the treatment tank, and a valve for controlling the on-off of the sewage pipe is provided on the sewage pipe.

[0014] Preferably, a motor is installed at the center of the upper end of the processing tank, and the output shaft of the motor is connected to the upper end of the center rod through a coupling, so that after the motor is started, the output shaft of the motor can drive the center rod to rotate, and then the impeller rotates in the processing tank.

[0015] Compared with existing technologies:

[0016] 1. The utility model rotates the center rod, which will drive the impeller to rotate. The impeller can drive the liquid above the filter net to flow downward. During the downward flow of the liquid, the liquid backwashes the filter net, thereby removing impurities blocked in the filter net. There is no need to disassemble the filter net for maintenance and cleaning, and it can always maintain an excellent filtering effect, reduce maintenance costs, and ensure the filtering effect.

[0017] 2. In the utility model, the scraper rod rotates with the rotation of the central rod and slides along the inner wall of the treatment tank, thereby effectively removing impurities and residues attached to the inner wall and ensuring the cleanliness of the interior of the treatment tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is an overall cross-sectional view of the utility model;

[0020] Figure 3 It is a cross-sectional view of the treatment tank, filter screen and impeller of the utility model;

[0021] Figure 4It is a cross-sectional view of the liquid inlet pipe, liquid inlet tank and connecting pipe of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the liquid inlet pipe, lifting frame, liquid inlet tank and connecting pipe of the utility model;

[0023] Figure 6 It is a cross-sectional exploded view of the treatment tank, filter screen, backwashing assembly and scraper rod of the utility model.

[0024] In the figure: 1, treatment tank, 2, filter screen, 3, liquid inlet pipe, 4, liquid outlet pipe, 5, backwash assembly, 501, center rod, 502, impeller, 6, motor, 7, bracket, 8, liquid storage tank, 9, lifting frame, 10, sewage pipe, 11, valve, 12, scraper rod, 13, stabilizing frame, 14, liquid inlet tank, 15, connecting pipe, 16, oil cylinder. DETAILED DESCRIPTION

[0025] The present invention is described below with specific embodiments, but is not intended to be a limitation of the present invention.

[0026] Example 1

[0027] like Figure 1-Figure 6 As shown, in this embodiment, a backwashing desulfurization waste liquid filtering device is provided, comprising a bracket 7, a processing tank 1 is mounted on the bracket 7, a filter screen 2 for intercepting impurities in the waste liquid is arranged inside the processing tank 1, a liquid inlet pipe 3 is connected to the processing tank 1 and located below the filter screen 2, and a liquid outlet pipe 4 is connected to the processing tank 1 and located above the filter screen 2;

[0028] The backwashing assembly 5 is provided inside the treatment tank 1. The backwashing assembly 5 includes a rotatable center rod 501. The center rod 501 is provided inside the treatment tank 1 and above the filter screen 2. An impeller 502 is connected to the center rod 501. When the center rod 501 rotates with the impeller 502, the impeller 502 drives the liquid in the treatment tank 1 to flow downward.

[0029] The process of filtering desulfurization waste liquid is as follows:

[0030] The desulfurized waste liquid is injected into the treatment tank 1 through the liquid inlet pipe 3. At this time, the desulfurized waste liquid flows upward in the treatment tank 1. The filter screen 2 can intercept impurities in the waste liquid. The impurities are intercepted and retained below the filter screen 2. The filtered liquid flows through the filter holes of the filter screen 2 to the top of the filter screen 2. When reaching the position of the liquid outlet pipe 4, the filtered liquid flows out from the liquid outlet pipe 4. As the falling waste liquid continuously enters the treatment tank 1 from the liquid inlet pipe 3, the desulfurized waste liquid is continuously filtered to improve the filtering effect.

[0031] The process of backwashing the filter 2 is as follows:

[0032] After filtering for a period of time, the center rod 501 is rotated once (for example, the center rod 501 rotates once every 24 hours). At this time, the center rod 501 rotates with the impeller 502, and the impeller 502 can drive the liquid above the filter screen 2 to flow downward. During the downward flow of the liquid, the liquid backwashes the filter screen 2, thereby removing impurities clogging the filter screen 2. There is no need to disassemble the filter screen 2 for maintenance and cleaning, and can always maintain an excellent filtering effect, reduce maintenance costs, and ensure the filtering effect.

[0033] The filter screen 2 is in a cone shape or a bowl-shaped structure. The cone shape or the bowl-shaped structure increases the surface area of ​​the filter screen 2. The increase in surface area also means that the filter screen 2 has more filter holes. More filter holes mean that impurities in the waste liquid have more channels to be intercepted, further improving the filtering effect. When the waste liquid enters the treatment tank 1 from the liquid inlet pipe 3 and flows upward, the larger surface area can more effectively intercept the impurities in the waste liquid, causing them to be retained under the filter screen 2.

[0034] The outer contour of the impeller 502 fits the inner wall of the treatment tank 1 and the upper surface of the filter screen 2. Since the outer contour of the impeller 502 fits the inner wall of the treatment tank 1, the space of the treatment tank 1 can be fully utilized during rotation to form an effective fluid dynamic force. This dynamic force causes the waste liquid in the treatment tank 1 to be strongly pushed downward, thereby achieving efficient downward flow of the waste liquid.

[0035] Secondly, the outer contour of the impeller 502 contacts the upper surface of the filter screen 2, ensuring that the liquid can flow evenly through the surface of the filter screen 2 during backwashing. The uniform flow helps to remove impurities that clog various positions on the filter screen 2, ensuring continuous and efficient filtration of the filter screen 2 and improving the efficiency of the entire filtration and backwashing process.

[0036] like Figure 1-Figure 3 As shown, in order to conveniently discharge the impurities intercepted in the treatment tank 1, a sewage pipe 10 is connected to the bottom of the treatment tank 1, and a valve 11 for controlling the on-off of the sewage pipe 10 is provided on the sewage pipe 10. When the waste liquid in the treatment tank 1 is filtered, the impurities will be intercepted and retained under the filter screen 2. After a period of time, these impurities will gradually accumulate at the bottom of the treatment tank 1. The valve 11 can be opened to allow the waste liquid and impurities at the bottom of the treatment tank 1 to be discharged through the sewage pipe 10;

[0037] The setting of valve 11 makes the sewage discharge process more controllable. During the normal filtering process, valve 11 can be kept closed to prevent the waste liquid and impurities from being accidentally discharged. When sewage discharge operation is required, valve 11 can be opened manually or automatically to allow the waste liquid and impurities to be discharged. Once the sewage discharge is completed, valve 11 can be closed again to maintain the sealing of the treatment tank 1;

[0038] This design not only facilitates the cleaning of impurities and the discharge of waste liquid, but also improves the efficiency and reliability of the entire filtering system, ensuring that the waste liquid in the processing tank 1 is always maintained at an appropriate level, thereby maintaining the filtering effect of the filter screen 2.

[0039] like Figure 1-Figure 3 As shown, in order to drive the center rod 501 to rotate, a motor 6 is installed at the center position of the upper end of the processing tank 1, and the output shaft of the motor 6 is connected to the upper end of the center rod 501 through a coupling, so that after the motor 6 is started, the output shaft of the motor 6 can drive the center rod 501 to rotate, and then the impeller 502 rotates in the processing tank 1.

[0040] Example 2

[0041] like Figure 1-Figure 5 As shown, on the basis of Example 1, in order to facilitate the waste liquid to flow downward in the treatment tank 1, a lifting frame 9 is slid up and down above the bracket 7, and the upper end of the lifting frame 9 is connected to the liquid inlet tank 14. The height of the position where the liquid outlet pipe 4 connects to the treatment tank 1 is higher than the bottom of the liquid inlet tank 14 and lower than the top of the liquid inlet tank 14. The lower end of the liquid inlet tank 14 is connected to a connecting pipe 15, and the connecting pipe 15 is slidably connected to the end of the liquid inlet pipe 3, and the sliding connection position of the connecting pipe 15 and the liquid inlet pipe 3 is sealed;

[0042] The desulfurized waste liquid to be filtered is introduced into the liquid inlet tank 14 by using an external pipeline. The waste liquid in the liquid inlet tank 14 is introduced into the treatment tank 1 through the liquid inlet pipe 3 by using the liquid level difference. After the liquid level in the treatment tank 1 is raised to the position where the liquid outlet pipe 4 is connected to the treatment tank 1, the liquid in the treatment tank 1 is discharged from the liquid outlet pipe 4.

[0043] When the backwashing operation is performed, the introduction of waste liquid into the liquid inlet tank 14 is stopped, and the lifting frame 9 slides downward, so that the lifting frame 9 moves downward with the liquid inlet tank 14. At this time, the liquid level of the liquid inlet tank 14 is lowered, so that the rotation of the impeller 502 is conducive to the backflow of the liquid in the treatment tank 1 to the liquid inlet tank 14, so as to achieve the purpose of facilitating the waste liquid to flow downward in the treatment tank 1 and improve the efficiency of backwashing. After the backwashing is completed, the lifting frame 9 is moved upward to reset the liquid inlet tank 14;

[0044] Furthermore, in order to drive the lifting frame 9 to move, a cylinder 16 is provided on the bracket 7, and an output shaft of the cylinder 16 is connected to the lifting frame 9. When the cylinder 16 is operated, the lifting frame 9 is driven to move, that is, the liquid inlet tank 14 is driven to move upward or downward.

[0045] like Figure 1-Figure 5As shown, in order to replenish the backwashing liquid into the treatment tank 1, a liquid storage tank 8 is placed on the bracket 7, and the water outlet of the liquid outlet pipe 4 is inserted into the interior of the liquid storage tank 8, wherein the water outlet of the liquid outlet pipe 4 is lower than the water outlet of the liquid storage tank 8, and the water outlet of the liquid outlet pipe 4 is below the liquid level in the liquid storage tank 8. With this design, when the impeller 502 rotates to drive the liquid in the treatment tank 1 to flow downward, the liquid outlet pipe 4 can reversely suck the liquid in the liquid storage tank 8 into the treatment tank 1, thereby replenishing the liquid in the treatment tank 1 and improving the backwashing efficiency.

[0046] Example 3

[0047] like Figure 6 As shown, based on Example 1, in order to clean the inner wall of the treatment tank 1 to keep the inner cavity of the treatment tank 1 clean, the lower end of the center rod 501 passes through the center position of the filter screen 2 and extends toward the bottom of the treatment tank 1. The center rod 501 is located below the filter screen 2 and is provided with a plurality of scraping rods 12, which are attached to the inner wall of the treatment tank 1.

[0048] A plurality of scraper rods 12 are arranged on the central rod 501 below the filter screen 2 and are distributed in a circular array, and the scraper rods 12 are connected to the channel connecting frame of the central rod 501, which increases the stability of the connection between the scraper rods 12 and the central rod 501. The scraper rods 12 fit the inner wall of the treatment tank 1. When the central rod 501 rotates, the scraper rods 12 rotate accordingly and slide along the inner wall of the treatment tank 1, effectively removing impurities and residues attached to the inner wall, thereby ensuring the cleanliness of the interior of the treatment tank 1.

[0049] In addition, a stabilizing frame 13 supporting the lower end of the central rod 501 is fixed to the bottom of the processing tank 1 .

[0050] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A backwashing desulfurization waste liquid filtering device, comprising a bracket (7), characterized in that: A treatment tank (1) is mounted on the support (7), a filter screen (2) is arranged inside the treatment tank (1), a liquid inlet pipe (3) is connected to the treatment tank (1) below the filter screen (2), and a liquid outlet pipe (4) is connected to the treatment tank (1) above the filter screen (2); A backwash assembly (5) is arranged inside the treatment tank (1), and the backwash assembly (5) comprises a rotatable center rod (501). The center rod (501) is arranged inside the treatment tank (1) and is located above the filter screen (2). An impeller (502) is connected to the center rod (501). When the center rod (501) rotates with the impeller (502), the impeller (502) drives the liquid in the treatment tank (1) to flow downward.

2. A backwashing desulfurization waste liquid filtering device according to claim 1, characterized in that: A lifting frame (9) is slidably mounted above the bracket (7), and the upper end of the lifting frame (9) is connected to a liquid inlet tank (14). The height of the position at which the liquid outlet pipe (4) is connected to the treatment tank (1) is higher than the bottom of the liquid inlet tank (14) and lower than the top of the liquid inlet tank (14). The lower end of the liquid inlet tank (14) is connected to a connecting pipe (15), and the connecting pipe (15) is slidably connected to the end of the liquid inlet pipe (3).

3. A backwashing desulfurization waste liquid filtering device according to claim 2, characterized in that: A liquid storage tank (8) is placed on the bracket (7), and the water outlet of the liquid outlet pipe (4) is inserted into the interior of the liquid storage tank (8), wherein the water outlet of the liquid outlet pipe (4) is lower than the water outlet of the liquid storage tank (8).

4. A backwashing desulfurization waste liquid filtering device according to claim 1, characterized in that: The lower end of the central rod (501) passes through the center of the filter screen (2) and extends toward the bottom of the processing tank (1). The central rod (501) is located below the filter screen (2) and is provided with a plurality of scraping rods (12), and the scraping rods (12) are attached to the inner wall of the processing tank (1).

5. A backwashing desulfurization waste liquid filtering device according to claim 1, characterized in that: The filter screen (2) is in a cone or bowl shape.

6. A backwashing desulfurization waste liquid filtering device according to claim 1, characterized in that: The outer contour of the impeller (502) fits onto the inner wall of the treatment tank (1) and the upper surface of the filter screen (2).

7. A backwashing desulfurization waste liquid filtering device according to claim 1, characterized in that: The bottom of the treatment tank (1) is connected to a sewage pipe (10), and the sewage pipe (10) is provided with a valve (11) for controlling the on-off of the sewage pipe (10).

8. A backwashing desulfurization waste liquid filtering device according to claim 1, characterized in that: A motor (6) is installed at the center of the upper end of the processing tank (1), and the output shaft of the motor (6) is connected to the upper end of the center rod (501) through a coupling.

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