Device and method for flushing inclined pipe of tap water sedimentation tank based on siphon type mud scraper

Abstract

The invention discloses a tap water sedimentation tank inclined pipe flushing device and method based on a siphon type mud scraper in the technical field of sedimentation tank cleaning, and the tap water sedimentation tank inclined pipe flushing device comprises the siphon type mud scraper installed in a sedimentation tank, and an aeration device and a siphon mud discharging device are installed on a bottom cross beam of the siphon type mud scraper; the siphon type sludge scraper translates in the sedimentation tank to hang sludge by utilizing the walking mechanism, and when the siphon type sludge scraper moves, the aeration device and the siphon sludge discharge device carry out aeration treatment and sludge suction treatment on different positions in the sedimentation tank. The siphon type sludge scraper is combined with the aeration device and the siphon sludge discharge device, manual cleaning of the tank bottom is replaced, the labor intensity of workers is effectively reduced, and the sludge discharge efficiency is greatly improved, so that the sludge discharge time is saved, the labor cost is reduced, and further improvement of the effluent quality is guaranteed.

Description

Technical Field

[0001] The invention relates to a device and method for flushing an inclined pipe of a tap water sedimentation tank based on a siphon-type mud scraper, and belongs to the technical field of sedimentation tank cleaning. Background Art

[0002] When the inclined tube sedimentation tank is in operation, the water flows from bottom to top, and the suspended matter such as sludge flocs in the water settles along the side wall of the inclined tube, and the water flows out of the inclined tube and enters the clean water area. The suspended matter in the inclined tube has a certain degree of adhesion. After running for a period of time, the suspended matter may adhere to the side wall of the inclined tube, resulting in a decrease in the cross-sectional area of ​​the inclined tube and an increase in the rising flow rate of the water flow, resulting in an increase in the turbidity of the outlet water; and in the process of the water flow entering the clean water area, the flow rate decreases due to the increase in the cross-sectional area, so part of the suspended matter in the water flow settles on the surface of the inclined tube, thereby blocking the inclined tube and affecting the quality of the outlet water. Therefore, regular cleaning of the inclined tube in the inclined tube sedimentation tank is an extremely important task in the operation of the inclined tube sedimentation tank. Improving the flushing efficiency of the inclined tube in the inclined tube sedimentation tank will effectively improve the production efficiency of the water plant.

[0003] At present, the conventional flushing method is to close the water inlet valve of the pool body, open the mud discharge valve, drain the water in the flocculation sedimentation tank, and then manually flush the inclined tube and the pool wall with a high-pressure water gun. The high-pressure water flow will impact and break the suspended flocs that have been generated and attached to the inner wall of the inclined tube. The crushed particles and water will gather at the bottom of the pool, and the particles will be discharged from the pool body by manually flushing the bottom of the pool. Then open the water inlet valve again, use the incoming water to flush the pool body, and drain the water through the mud discharge valve. The cleaning staff observes the water quality of the drain valve. Only when it is clear and transparent can they close the drain valve and make water normally. This cleaning method requires a long production stoppage time, a high loss of cleaning water, high manual labor intensity, and poor cleaning effect. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an inclined tube flushing device and method for a tap water sedimentation tank based on a siphon scraper. By installing an aeration device and a siphon mud discharge device on the bottom cross beam of the siphon scraper, aeration treatment and mud suction treatment can be performed on different positions in the sedimentation tank, thereby reducing the intensity of manual labor.

[0005] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0006] In the first aspect, the present invention provides an inclined tube flushing device for a tap water sedimentation tank based on a siphon scraper, comprising: a siphon scraper installed in the sedimentation tank, the bottom cross beam of the siphon scraper is equipped with an aeration device and a siphon mud discharge device, the siphon scraper utilizes a walking mechanism to translate the mud in the sedimentation tank, and when the siphon scraper moves, the aeration device and the siphon mud discharge device perform aeration treatment and mud suction treatment on different positions in the sedimentation tank.

[0007] Furthermore, the aeration device is powered by a power source outside the sedimentation tank, and the power source includes a screw air compressor, an air storage tank and a cold dryer connected in sequence through an aeration pipe, and a control valve is installed at the aeration pipe. After the screw air compressor is started and the control valve is opened, the screw air compressor transports the gas in the air storage tank to the cold dryer through the aeration pipe, and the gas output by the cold dryer is then transported to the inside of the sedimentation tank through the aeration pipe, so as to aerate the bottom of the sedimentation tank.

[0008] Furthermore, the siphon mud discharge device includes a vacuum pump, a mud suction pipe and a drainage trough. After the vacuum pump is turned on, the mud suction pipe sucks mud from the sedimentation tank, and the sucked mud is discharged along the drainage trough.

[0009] Furthermore, the vacuum pump is installed on the side beam of the siphon scraper.

[0010] Furthermore, the aeration device and the mud suction pipe are fixed to the bottom crossbeam of the siphon type mud scraper through a clamp.

[0011] Furthermore, the aeration device and the mud suction pipeline are located on the upper and lower surfaces of the bottom crossbeam of the siphon scraper, and the aeration hole of the aeration device faces upward and is located below the inclined pipe in the sedimentation tank.

[0012] In a second aspect, the present invention provides an inclined tube flushing method for a tap water sedimentation tank based on a siphon scraper, comprising: closing a water inlet valve of a flocculation sedimentation tank, opening a sludge discharge valve at the bottom of the flocculation sedimentation tank to drain water, and after the water level of the sedimentation tank is lower than a preset distance from the upper surface of the water tank, closing the sludge discharge valve of the flocculation sedimentation tank, starting a walking mechanism, a siphon scraper, an aeration device and a siphon sludge discharge device to discharge sludge and perform mobile aeration. After aeration is completed, the aeration device is closed and kept for a preset time, and then the walking mechanism, the siphon scraper and the siphon sludge discharge device are opened again to siphon sludge and discharge the sludge water. When the sludge discharge is completed, the main water inlet valve of the flocculation sedimentation tank is opened to produce water normally.

[0013] Furthermore, the water surface of the sedimentation tank is preset to be 100 mm below the upper surface of the water tank.

[0014] Furthermore, the preset stay time of the aeration device after closing is 20 minutes.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention installs an aeration device and a siphon mud discharge device on the bottom crossbeam of the siphon mud scraper. When the siphon mud scraper moves, the aeration device and the siphon mud discharge device perform aeration treatment and mud suction treatment on different positions in the sedimentation tank, and can simultaneously achieve mud scraping, mobile aeration and mud discharge. The siphon mud scraper replaces manual cleaning of the pool bottom, effectively reducing the labor intensity and greatly improving the mud discharge efficiency, thereby saving mud discharge time, reducing labor costs, and ensuring that the effluent water quality is further improved;

[0017] Second, the present invention utilizes the walking and mud discharge functions of the siphon scraper to press out compressed air through the aeration holes to form a gas explosion, which vibrates and drops the mud blocks attached to or blocked in the inclined tube and discharges them through the siphon pipe, which can effectively improve the cleaning efficiency and effect of the inclined tube sedimentation tank in the water plant, while reducing the cleaning cost and saving more than 40% of the flushing time compared with the original traditional flushing method. The air flushing device replaces the manual high-pressure water gun flushing, and there is no need to lower the liquid level in the pool. After aeration, the suspended particles will not be dispersed and can settle faster, thereby effectively saving cleaning time, labor and cleaning water losses, and improving the water quality of the effluent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 A schematic structural diagram of an inclined tube flushing device for a tap water sedimentation tank based on a siphon-type scraper provided in Example 1 of the present invention.

[0020] In the figure: 1. Aeration pipe; 2. Mud suction pipe; 3. Walking mechanism; 4. Siphon scraper; 5. Vacuum pump; 6. Drain trough; 7. Inclined pipe; 8. Control valve; 9. Screw air compressor; 10. Air storage tank; 11. Cold dryer; 12. Sedimentation tank. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0022] The following detailed description is an exemplary description, which is intended to provide further detailed description of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention.

[0023] Embodiment 1:

[0024] The inclined tube sedimentation tank is one of the most common treatment processes in tap water treatment. It refers to a sedimentation tank with inclined tubes in the sedimentation area. The sedimentation area of ​​the horizontal or vertical flow sedimentation tank is divided into a series of shallow sedimentation layers using inclined parallel tubes, parallel pipes and honeycomb fillers. Suspended particles such as sludge flocs are precipitated in the inclined tube fillers and separated from the water, thereby achieving water purification. Since the inclined tube fillers are generally in the middle of the pool, it is necessary to empty the pool water level to one-third of the position and then manually flush it with a high-pressure water gun. The entire cleaning process takes a long time, has a large water loss, high labor intensity, and poor cleaning effect.

[0025] In order to solve the above-mentioned technical problems, the present embodiment provides an inclined tube flushing device for a tap water sedimentation tank based on a siphon scraper, so as to efficiently solve the problem of sludge accumulation in the inclined tube sedimentation tank of a conventional tap water plant. The siphon scraper is a sedimentation tank scraping and suction equipment commonly used in urban water plants and urban sewage treatment plants. The sludge suction pipe and the scraper plate are designed according to the liquid level difference and air lift principle. Under the action of the liquid level difference, the silt, suspended matter, organic matter and other solid particles deposited at the bottom of the water body are discharged to the outside of the pool through the sludge suction port, sludge collecting trough, siphon pipe, central sludge pipe and sludge discharge pipe. This device is designed based on the siphon scraper. The whole device consists of four parts: power source, walking mechanism, aeration device and siphon sludge discharge. Please refer to Figure 1 ,in:

[0026] The power source is composed of a screw air compressor 9, a gas storage tank 10, a cold dryer 11 and a control valve 8, and is the core power for realizing oblique tube aeration. The aeration pipe 1 is used to sequentially connect the screw air compressor 9, the gas storage tank 10 and the cold dryer 11, and the control valve 8 is installed at the aeration pipe 1. After the screw air compressor 9 is started and the control valve 8 is opened, the screw air compressor 8 transports the gas in the gas storage tank 10 to the cold dryer 11 through the aeration pipe 1, and the gas output by the cold dryer 11 is then transported to the inside of the sedimentation tank 12 through another aeration pipe 1, and the bottom of the sedimentation tank 12 is aerated.

[0027] The walking mechanism 3 utilizes the walking motor of the siphon scraper 4 itself and realizes walking speed control by installing a frequency converter drive. The siphon scraper 4 is located at the lower part of the walking mechanism 3 and moves along the vertical direction of the cross section of the sedimentation tank 12 driven by the walking mechanism 3 to realize the scraping treatment of the sedimentation tank 12 at different positions.

[0028] The aeration device (i.e., the aeration pipe 1 located in the sedimentation tank 12) is made of a PVC pipe of suitable diameter and is fixed to the crossbeam at the bottom of the siphon scraper 4 by a clamp. The aeration holes face upward and are located below the inclined pipe 7. The hole diameter and spacing are designed and calculated based on the actual tank body conditions. The aeration device can aerate different positions of the sedimentation tank 12 when the siphon scraper 4 moves.

[0029] The siphon mud discharge device is composed of a vacuum pump 5, a mud suction pipe 2 and a drainage trough 6. The mud and water at the bottom of the sedimentation tank are discharged by the siphon principle, and the mud discharge valve at the bottom of the tank can also be used to discharge mud synchronously. The mud suction pipe 2 is fixed under the crossbeam at the bottom of the siphon scraper 4 by a clamp, and the vacuum pump 5 is fixed at the side beam of the siphon scraper 4. When the vacuum pump 5 is turned on, the siphon scraper 4 drives the mud suction pipe 2 to move along the vertical direction of the cross section of the sedimentation tank 12 when moving, so as to realize the mud suction treatment at different positions of the sedimentation tank 12, and the sucked mud is discharged along the drainage trough 6.

[0030] Embodiment 2:

[0031] The method for flushing the inclined tube of a tap water sedimentation tank based on a siphon-type scraper is implemented based on the device for flushing the inclined tube of a tap water sedimentation tank based on a siphon-type scraper described in Embodiment 1, and comprises:

[0032] Close the water inlet valve of the flocculation sedimentation tank, open the mud discharge valve at the bottom of the flocculation sedimentation tank to drain the water, wait until the water level of the sedimentation tank is 100mm lower than the upper surface of the water tank, close the mud discharge valve of the flocculation sedimentation tank, turn on the screw air compressor 9, open the control valve 8, turn on the walking mechanism 3 above the siphon scraper 4, turn on the vacuum pump 5, discharge the air inside the siphon pipe, realize mud discharge, realize mobile aeration, and flush the inclined pipe 7 with air. After aeration, stop the screw air compressor 9, close the control valve 8, stay for 20 minutes, and turn on the walking mechanism 3 and the vacuum pump 5 again to realize the siphon mud discharge function and discharge the muddy water. Visually observe that the water in the mud discharge tank is clear and is considered to be qualified for cleaning. Open the main water inlet valve of the flocculation sedimentation tank to make water normally.

[0033] The present invention utilizes the walking and mud discharge functions of the siphon scraper to press out compressed air through the aeration holes to form a gas explosion, so that the mud blocks attached to or blocked in the inclined tube are vibrated and fall down and discharged through the siphon pipe. The present invention can effectively improve the cleaning efficiency and effect of the inclined tube sedimentation tank of the water plant, while reducing the cleaning cost, and saving more than 40% of the flushing time compared with the original traditional flushing method. On the one hand, the air flushing device replaces the manual high-pressure water gun flushing, and there is no need to lower the liquid level in the pool. After aeration, the suspended particles will not be dispersed and can settle down faster, thereby effectively saving cleaning time, labor and cleaning water loss, and improving the water quality of the effluent; on the other hand, the siphon scraper replaces the manual cleaning of the pool bottom, which can greatly improve the mud discharge efficiency, thereby saving mud discharge time, reducing labor costs, and ensuring that the water quality of the effluent is further improved.

[0034] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. The inclined pipe flushing device of the tap water sedimentation tank based on the siphon type scraper is characterized by: include: A siphon scraper is installed in a sedimentation tank, and an aeration device and a siphon mud discharge device are installed on the bottom cross beam of the siphon scraper. The siphon scraper uses a walking mechanism to translate the mud in the sedimentation tank, and when the siphon scraper moves, the aeration device and the siphon mud discharge device perform aeration treatment and mud suction treatment on different positions in the sedimentation tank.

2. The tap water sedimentation tank inclined tube flushing device based on a siphon-type scraper according to claim 1 is characterized in that: The aeration device is powered by a power source outside the sedimentation tank. The power source includes a screw air compressor, an air storage tank and a cold dryer connected in sequence through an aeration pipe, and a control valve is installed at the aeration pipe. After the screw air compressor is started and the control valve is opened, the screw air compressor transports the gas in the air storage tank to the cold dryer through the aeration pipe, and the gas output by the cold dryer is then transported to the inside of the sedimentation tank through the aeration pipe to aerate the bottom of the sedimentation tank.

3. The tap water sedimentation tank inclined tube flushing device based on a siphon-type scraper according to claim 1 is characterized in that: The siphon mud discharge device comprises a vacuum pump, a mud suction pipeline and a drainage trough. After the vacuum pump is turned on, the mud suction pipeline sucks mud from the sedimentation tank, and the sucked mud is discharged along the drainage trough.

4. The tap water sedimentation tank inclined tube flushing device based on a siphon-type scraper according to claim 3 is characterized in that: The vacuum pump is installed on the side beam of the siphon type scraper.

5. The tap water sedimentation tank inclined tube flushing device based on a siphon-type scraper according to claim 1 is characterized in that: The aeration device and the mud suction pipeline are both fixed to the bottom crossbeam of the siphon type mud scraper through a clamp.

6. The tap water sedimentation tank inclined pipe flushing device based on a siphon-type scraper according to claim 1 is characterized in that: The aeration device and the mud suction pipeline are located on the upper and lower surfaces of the bottom crossbeam of the siphon-type mud scraper. The aeration hole of the aeration device faces upward and is located below the inclined pipe in the sedimentation tank.

7. A tap water sedimentation tank oblique tube flushing method based on a siphon scraper, characterized in that: The device is implemented by using the inclined tube flushing device for a tap water sedimentation tank based on a siphon scraper as described in any one of claims 1 to 6, comprising: closing the water inlet valve of the flocculation sedimentation tank, opening the mud discharge valve at the bottom of the flocculation sedimentation tank to drain water, and after the water level of the sedimentation tank is lower than a preset distance from the upper surface of the water tank, closing the mud discharge valve of the flocculation sedimentation tank, starting the walking mechanism, the siphon scraper, the aeration device and the siphon mud discharge device to discharge mud and carry out mobile aeration, after aeration is completed, closing the aeration device and staying for a preset time, and then starting the walking mechanism, the siphon scraper and the siphon mud discharge device again to siphon mud and discharge muddy water, and when the mud discharge is completed, opening the main water inlet valve of the flocculation sedimentation tank to make water normally.

8. The method for flushing the inclined pipe of a tap water sedimentation tank based on a siphon-type scraper according to claim 7 is characterized in that: The water surface of the sedimentation tank is preset to be 100 mm below the upper surface of the water tank.

9. The method for flushing the inclined pipe of a tap water sedimentation tank based on a siphon-type scraper according to claim 7, characterized in that: The preset retention time after the aeration device is closed is 20 minutes.

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