Energy-saving multistage water treatment backwashing device

Abstract

The utility model discloses an energy-saving multistage water treatment backwashing device, which belongs to the technical field of water treatment backwashing, drainage pipelines are arranged at the upper parts of the side walls of a first filtering tank, a second filtering tank and a sterilization and disinfection tank, and backwashing operation of the filtering tanks and the sterilization and disinfection tank is realized through a backwashing water pump, a water conveying pipeline and the drainage pipelines; a water inlet pipe and a water outlet pipe are connected to the side wall of the fixed pipe, a centrifugal pump and a dosing tank are connected between the water inlet pipe and the water outlet pipe, and the centrifugal pump drives liquid medicine in the dosing tank to enter the fixed pipe and drives the liquid medicine to enter the filtering tank and the sterilization tank to improve the backwashing efficiency. The centrifugal pump is used for uniformly injecting liquid medicine into the water inlet pipe, the liquid medicine enters the filtering and sterilizing tank along with water flow, backwashing efficiency is improved, and cleanliness of filtering media is guaranteed. Impurities are thoroughly removed through dosing backwashing, the service life of a medium is prolonged, small particles and organic matters are removed, and the water quality treatment effect is improved. The system reduces the backwashing frequency and intensity, and reduces the energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of water treatment backwashing technology, and in particular to an energy-saving multi-stage water treatment backwashing device. Background Technology

[0002] A multi-stage water treatment backwashing device is a device used to filter and purify water. It removes suspended solids, colloids, organic matter, bacteria, and other impurities from water through a multi-stage filtration system. This device typically includes several filtration units, each using different types of filter media, such as sand filters, activated carbon, and quartz sand, to achieve different levels of purification.

[0003] Backwashing is a crucial function of this device. It uses reverse water flow to flush the filter media, removing impurities accumulated on its surface and inside, thereby restoring the filter's filtration capacity. The backwashing process is typically controlled by an automatic control system, initiated periodically or based on changes in filter differential pressure. During backwashing, the device halts normal filtration, using a portion of pre-treated water or dedicated backwash water at a high flow rate through the filter media to flush out impurities and remove them from the system.

[0004] Current multi-stage water treatment backwashing systems typically add chemicals directly into the water supply pipeline during actual cleaning. This method has several drawbacks, including inconvenience in adding and replacing chemicals. First, because the chemicals are added directly to the pipeline, operators must add them at specific locations, potentially requiring partial system shutdown or operation at specific times, thus disrupting the continuous operation of the entire water treatment system. Second, the dosage and timing of chemical addition require precise control; otherwise, waste or insufficient addition may occur, affecting the water treatment effect. Furthermore, adding chemicals directly into the pipeline hinders the rapid replacement of different types of chemicals, as each replacement necessitates pipeline cleaning to prevent residual chemicals from affecting the effectiveness of the new agent. Finally, this method also makes monitoring and adjustment of the dosing process difficult, as it is challenging to monitor the distribution and reaction of chemicals in the water in real time once added to the pipeline. Utility Model Content

[0005] The main objective of this invention is to provide an energy-saving multi-stage water treatment backwashing device that can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An energy-saving multi-stage water treatment backwashing device includes a first filter tank, a second filter tank, a sterilization tank, and connecting pipes. The first filter tank, the second filter tank, and the sterilization tank are connected through the connecting pipes to realize multi-stage water treatment operation.

[0008] The lower ends of the first filter tank, the second filter tank, and the sterilization tank are all equipped with bends, and the other end of the bends is connected to a fixed pipe. The outer end of the fixed pipe is connected to a water supply pipe through a backwash water pump. The upper side wall of the first filter tank, the second filter tank, and the sterilization tank is provided with a drain pipe. The backwashing operation of the filter tank and the sterilization tank is realized through the backwash water pump, the water supply pipe, and the drain pipe.

[0009] The side wall of the fixed pipe is connected to an inlet pipe and an outlet pipe. A centrifugal pump and a dosing tank are connected between the inlet pipe and the outlet pipe. The centrifugal pump drives the chemical solution in the dosing tank into the fixed pipe, and then drives the chemical solution into the filter tank and the sterilization tank to improve the backwashing efficiency.

[0010] The first filter tank uses an inorganic flocculant to flocculate and settle the water, the second filter tank uses a PP cotton filter element and an ultrafiltration membrane filter element to filter the water, and the sterilization and disinfection tank uses ultraviolet light to sterilize and disinfect.

[0011] The upper ends of the first filter tank, the second filter tank, and the sterilization tank are connected to the tank lids by a locking device, and the upper ends of the tank lids are provided with pipes and valves.

[0012] The bent pipe is fixed to the first filter tank, the second filter tank, and the sterilization tank by bolts and nuts. The bent pipe and the fixed pipe are designed as an integral part. The fixed pipe is connected to the backwash water pump by connecting flanges, bolts, and nuts. The water supply pipe is also connected to the backwash water pump by connecting flanges, bolts, and nuts.

[0013] A butterfly valve is provided between the bend and the filter tank or sterilization tank, and valves are provided on the water supply pipe and the drainage pipe;

[0014] The inlet pipe, outlet pipe and fixed pipe are designed as an integral part, and the inlet pipe and outlet pipe are equipped with connecting flanges. The dosing tank is connected to the outlet pipe through a threaded part. The centrifugal pump is connected to the inlet pipe and outlet pipe through connecting flanges, bolts and nuts. The dosing tank is equipped with a drip port in the tank opening, and the medicine is added to the inlet pipe through the drip port.

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

[0016] By using a centrifugal pump, the chemicals in the dosing tank can be evenly injected into the inlet pipe. These chemicals then flow with the water into the filter tank and sterilization tank, effectively improving backwashing efficiency and ensuring the cleanliness of the filter media. The chemical backwashing process more thoroughly removes impurities and dirt from the filter media, reducing clogging and extending its lifespan. Furthermore, chemical backwashing helps remove fine particles and organic matter that are difficult to remove through physical rinsing, further enhancing water treatment performance.

[0017] Because chemical backwashing systems can remove impurities from filter media more efficiently, the frequency and intensity of backwashing can be reduced, thereby lowering overall energy consumption. By installing butterfly valves and various other valves in the system, the intensity and duration of backwashing can be flexibly adjusted according to actual needs, improving operational flexibility and system adaptability.

[0018] The entire device is designed with ease of operation and maintenance in mind. For example, the use of a locking mechanism to connect the tank lid and a threaded connection to the dosing tank makes daily operation and maintenance simpler and more efficient. This design not only improves work efficiency but also ensures the stable operation of the system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a side view of the overall structure of this utility model;

[0021] Figure 3 This is a top view of the overall structure of this utility model;

[0022] Figure 4 The diagram shows the fixed pipe, dosing tank, centrifugal pump, backwash pump, and water pipeline of this utility model.

[0023] In the diagram: 1. First filter tank; 2. Second filter tank; 3. Sterilization tank; 4. Connecting pipe; 5. Bend; 6. Fixing pipe; 7. Inlet pipe; 8. Dosing tank; 9. Centrifugal pump; 10. Outlet pipe; 11. Backwash water pump; 12. Water supply pipe; 13. Drainage pipe. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] like Figure 1 - Figure 4 As shown, an energy-saving multi-stage water treatment backwashing device is characterized by high efficiency and energy saving. It mainly consists of a first filter tank 1, a second filter tank 2, a sterilization tank 3, and connecting pipes 4. These components are interconnected via the connecting pipes 4 to achieve multi-stage water treatment operation. Specifically, the lower ends of the first filter tank 1, the second filter tank 2, and the sterilization tank 3 are all equipped with elbows 5, the other ends of which are connected to fixed pipes 6. The outer end of the fixed pipe 6 is connected to the water supply pipe 12 via a backwash water pump 11, thereby ensuring the smooth operation of the entire system.

[0026] Drainage pipes 13 are respectively provided on the upper side walls of the first filter tank 1, the second filter tank 2, and the sterilization tank 3. These drainage pipes 13 work in conjunction with the backwash water pump 11 and the water supply pipe 12 to achieve backwashing of the filter tanks and the sterilization tank 3. To further improve the backwashing efficiency, an inlet pipe 7 and an outlet pipe 10 are also connected to the side wall of the fixed pipe 6. A centrifugal pump 9 and a dosing tank 8 are connected between the inlet pipe 7 and the outlet pipe 10. The centrifugal pump 9 can drive the chemical solution in the dosing tank 8 into the fixed pipe 6, and then into the filter tank and the sterilization tank 3, thereby significantly improving the backwashing efficiency.

[0027] In the water treatment process, the first filter tank 1 uses an inorganic flocculant to flocculate and settle the water, removing suspended solids and impurities. The second filter tank 2 uses a PP cotton filter element and an ultrafiltration membrane filter element to finely filter the water, ensuring its purity. The sterilization and disinfection tank 3 uses ultraviolet light irradiation to sterilize and disinfect the water, ensuring its safety.

[0028] For ease of operation and maintenance, the upper ends of the first filter tank 1, the second filter tank 2, and the sterilization tank 3 are connected to tank lids via locking devices. The upper ends of the tank lids are equipped with pipes and valves. Furthermore, the elbow 5 is fixed to each tank body with bolts and nuts to ensure structural stability. The elbow 5 is integrated with the fixed pipe 6, which is connected to the backwash water pump 11 via connecting flanges, bolts, and nuts. The water delivery pipe 12 is also connected to the backwash water pump 11 via connecting flanges, bolts, and nuts, ensuring the system's sealing and reliability.

[0029] To further enhance the system's operational flexibility, a butterfly valve is installed between the bend 5 and the filter tank or sterilization tank 3. Valves are also installed on the water supply pipe 12 and the drainage pipe 13 to facilitate adjustment as needed. The inlet pipe 7 and outlet pipe 10 are integrated with the fixed pipe 6, and the pipe openings are equipped with connecting flanges. The dosing tank 8 is connected to the outlet pipe 10 via a threaded connection, and the centrifugal pump 9 is connected to the inlet pipe 7 and outlet pipe 10 via connecting flanges, bolts, and nuts. The dosing tank 8 has a drip nozzle inside its opening, through which chemicals are added to the inlet pipe 7, ensuring uniform distribution and effective utilization of the chemicals.

[0030] Through the above design, this energy-saving multi-stage water treatment backwashing device not only achieves efficient and energy-saving water treatment, but also features simple operation and convenient maintenance, greatly improving the efficiency and safety of water treatment.

[0031] Water treatment process: Raw water is first introduced into the first filter tank 1. At this stage, inorganic flocculants are added, effectively removing suspended solids and impurities through flocculation and sedimentation. After preliminary flocculation treatment, the water flows into the second filter tank 2, where PP cotton filter cartridges and ultrafiltration membrane cartridges perform fine filtration to further ensure water purity. Subsequently, the double-filtered water enters the sterilization tank 3, where ultraviolet light irradiation thoroughly sterilizes and disinfects the water, ensuring its safety.

[0032] Backwashing process: During backwashing, the backwash water pump 11 discharges water from the lower end of the filter tank and sterilization tank 3 through fixed pipes and connecting pipes 4. Simultaneously, the centrifugal pump 9 drives the chemical solution in the dosing tank 8, guiding it through fixed pipes 6 into the filter tank and sterilization tank 3 to improve backwashing efficiency. The dosing tank 8 has a drip outlet inside its opening, through which the chemical solution is evenly added to the inlet pipe 7, ensuring uniform distribution and effective utilization. After the backwashing operation is complete, the system discharges the backwash wastewater through the drain pipe 13 to maintain the cleanliness of the filter media, thereby ensuring the efficient operation of the entire system.

[0033] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An energy-saving multi-stage water treatment backwashing device, comprising a first filter tank (1), a second filter tank (2), a sterilization tank (3), and a connecting pipe (4), wherein the first filter tank (1), the second filter tank (2), and the sterilization tank (3) are connected through the connecting pipe (4) to realize multi-stage water treatment operation, characterized in that: The lower ends of the first filter tank (1), the second filter tank (2), and the sterilization tank (3) are all equipped with bends (5), and the other end of the bends (5) is connected to a fixed pipe (6). The outer end of the fixed pipe (6) is connected to a water supply pipe (12) through a backwash water pump (11). The upper side wall of the first filter tank (1), the second filter tank (2), and the sterilization tank (3) is provided with a drain pipe (13). The backwashing operation of the filter tank and the sterilization tank (3) is realized through the backwash water pump (11), the water supply pipe (12), and the drain pipe (13). The side wall of the fixed pipe (6) is connected to an inlet pipe (7) and an outlet pipe (10). A centrifugal pump (9) and a dosing tank (8) are connected between the inlet pipe (7) and the outlet pipe (10). The centrifugal pump (9) drives the medicine in the dosing tank (8) into the fixed pipe (6), and drives the medicine into the filter tank and the sterilization tank (3) to improve the backwashing efficiency.

2. The energy-saving multi-stage water treatment backwashing device according to claim 1, characterized in that: The first filter tank (1) uses inorganic flocculant to flocculate and settle the water, the second filter tank (2) uses PP cotton filter element and ultrafiltration membrane filter element to filter the water, and the sterilization tank (3) uses ultraviolet lamp to sterilize and disinfect.

3. The energy-saving multi-stage water treatment backwashing device according to claim 2, characterized in that: The upper ends of the first filter tank (1), the second filter tank (2) and the sterilization tank (3) are connected to the tank lids by a locking device, and the upper ends of the tank lids are provided with pipes and valves.

4. The energy-saving multi-stage water treatment backwashing device according to claim 3, characterized in that: The bend (5) is fixed to the first filter tank (1), the second filter tank (2), and the sterilization tank (3) by bolts and nuts. The bend (5) and the fixed pipe (6) are designed as a whole. The fixed pipe (6) is connected to the backwash water pump (11) by connecting flanges, bolts and nuts. The water supply pipe (12) is connected to the backwash water pump (11) by connecting flanges, bolts and nuts.

5. The energy-saving multi-stage water treatment backwashing device according to claim 4, characterized in that: A butterfly valve is provided between the bend (5) and the filter tank or sterilization tank (3), and valves are provided on the water supply pipe (12) and the drainage pipe (13).

6. The energy-saving multi-stage water treatment backwashing device according to claim 5, characterized in that: The inlet pipe (7), outlet pipe (10) and fixed pipe (6) are designed as a whole, and the inlet pipe (7) and outlet pipe (10) are provided with connecting flanges. The dosing tank (8) is connected to the outlet pipe (10) through a threaded part. The centrifugal pump (9) is connected to the inlet pipe (7) and outlet pipe (10) through connecting flanges, bolts and nuts. The dosing tank (8) is provided with a drip port, and the medicine is added to the inlet pipe (7) through the drip port.

Images