Intelligent filtering system capable of automatically switching circulating water

Abstract

The utility model is suitable for the technical field of circulating water filtration, and provides an automatic switching circulating water intelligent filtration system, which comprises a circulating water bypass filter pipe, a filter cylinder and a backwashing nitrogen pipe, and a first valve and a fourth valve are respectively arranged on the circulating water bypass filter pipe. The surface of the circulating water bypass filter pipe is communicated with a guide pipe located between the first valve and the fourth valve, and the other end of the guide pipe is communicated with the top of the inner cavity of the filter cylinder. According to the intelligent filtering system capable of automatically switching the circulating water, through automatic switching of flushing modes, the comprehensive advantages of the automatic switching of flushing modes can be fully played, the cleaning effect is improved, under the same water quality and filtering conditions, the types and attachment degrees of dirt on a filter screen may be different, and the automatic switching of flushing modes can be flexibly adjusted according to actual requirements; and the filter screen can be thoroughly cleaned under various working conditions.

Description

Technical Field

[0001] This utility model belongs to the field of circulating water filtration technology, and in particular relates to an intelligent circulating water filtration system with automatic switching. Background Technology

[0002] With the rapid development of global industrialization and urbanization, water scarcity and water pollution are becoming increasingly serious problems. As an indispensable part of industrial production and urban life, the efficient utilization and purification of circulating water systems are of great significance for saving water resources, reducing water costs, and minimizing wastewater discharge. The application of intelligent filtration technology can significantly improve the filtration efficiency and purification effect of circulating water systems, achieving the recycling and efficient use of water resources.

[0003] In the existing technology, water flushing and air flushing of the circulating water intelligent filtration system each have their advantages. Water flushing is suitable for removing most of the dirt and particulate matter on the surface of the filter screen, while air flushing can more effectively remove fine impurities and microorganisms attached deep to the filter screen.

[0004] However, most existing intelligent circulating water filtration systems cannot automatically switch between these two flushing modes, which may result in incomplete cleaning of the filter screen and affect the filtration effect. A single flushing mode cannot meet the optimal cleaning effect under different water quality and filtration requirements. In order to maintain a certain filtration efficiency, more frequent manual intervention or adjustment of flushing parameters may be required, thereby increasing operating costs and maintenance workload. Utility Model Content

[0005] This invention provides an automatic switching intelligent filtration system for circulating water, which aims to solve the problem that most existing intelligent filtration systems for circulating water cannot automatically switch between these two rinsing methods, which may lead to incomplete cleaning of the filter screen and affect the filtration effect.

[0006] This utility model is implemented as follows: an automatic switching intelligent filtration system for circulating water includes a circulating water bypass filter pipe, a filter cylinder, and a backwash nitrogen pipe. The circulating water bypass filter pipe is respectively provided with a first valve and a fourth valve. A guide pipe located between the first valve and the fourth valve is connected to the surface of the circulating water bypass filter pipe. The other end of the guide pipe is connected to the top of the inner cavity of the filter cylinder.

[0007] One end of the circulating water side filter pipe is connected to a connecting pipe, the other end of the connecting pipe is connected to the other end of the circulating water side filter pipe, the other end of the circulating water side filter pipe is connected to a sewage well, the bottom of the filter cylinder is connected to a drain pipe connected to a clear water tank, and a fifth valve is installed on the drain pipe.

[0008] The other end of the backwash nitrogen pipe is connected to the lower part of the inner cavity of the filter cylinder. A third valve is provided on the backwash nitrogen pipe. A pressure relief pipe is connected to the surface of the backwash nitrogen pipe. A seventh valve is provided on the pressure relief pipe.

[0009] Preferably, an electric contact pressure gauge is provided on the surface of the backwash nitrogen pipe, and the pressure relief pipe is located between the third valve and the electric contact pressure gauge.

[0010] Preferably, the top of the side wall of the filter cylinder is connected to an overflow pipe, and an eighth valve is provided on the overflow pipe.

[0011] Preferably, a perforated stainless steel tube is fixedly connected to the top of the inner wall of the filter cylinder, and the perforated stainless steel tube covers the outside of the other end of the guide tube.

[0012] Preferably, a steel support is fixedly connected to the lower part of the inner wall of the filter cylinder, a perforated stainless steel mesh is provided on the upper surface of the steel support, a fine stainless steel wire mesh is provided on the upper surface of the perforated stainless steel mesh, and a comet-shaped fiber filter media is provided on the upper surface of the fine stainless steel wire mesh.

[0013] Preferably, a maintenance manhole is provided in the middle of the side wall of the filter cylinder.

[0014] Beneficial effects

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: This utility model's automatic switching circulating water intelligent filtration system can fully utilize the combined advantages of different flushing methods to improve the cleaning effect. Under different water quality and filtration conditions, the types and degrees of dirt on the filter screen may vary. The automatic switching of flushing methods can be flexibly adjusted according to actual needs, ensuring that the filter screen is thoroughly cleaned under various operating conditions. This reduces the need for manual intervention, lowers the workload and labor intensity of maintenance personnel, and automatically adjusts flushing parameters such as flushing time and flushing intensity according to water quality and filtration effect, avoiding over-flushing or under-flushing. This reduces water consumption and equipment wear, improves the cleaning effect, reduces dirt accumulation on the filter screen, extends the service life of the filter screen and equipment, reduces the cost of replacing the filter screen and equipment, and fully utilizes the adsorption and filtration performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the automatic switching intelligent filtration system for circulating water of this utility model.

[0017] In the diagram: 1. First valve; 2. Second valve; 3. Third valve; 4. Fourth valve; 5. Fifth valve; 6. Sixth valve; 7. Seventh valve; 8. Eighth valve; 9. Circulating water bypass filter pipe; 10. Connecting pipe; 11. Drain pipe; 12. Overflow pipe; 13. Pressure relief pipe; 14. Backwash nitrogen pipe; 15. Filter cylinder; 16. Perforated stainless steel pipe; 17. Guide pipe; 18. Comet-shaped fiber filter media; 19. Fine-mesh stainless steel wire mesh; 20. Steel support; 21. Perforated stainless steel mesh plate; 22. Inspection manhole; 23. Electrical contact pressure gauge. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] Please see Figure 1 This utility model provides a technical solution: an automatic switching intelligent filtration system for circulating water, including a circulating water bypass filter pipe 9, a filter cylinder 15 and a backwash nitrogen pipe 14. The circulating water bypass filter pipe 9 is respectively provided with a first valve 1 and a fourth valve 4. The surface of the circulating water bypass filter pipe 9 is connected to a guide pipe 17 located between the first valve 1 and the fourth valve 4. The other end of the guide pipe 17 is connected to the top of the inner cavity of the filter cylinder 15.

[0020] One end of the circulating water side filter pipe 9 is connected to the connecting pipe 10, and the other end of the connecting pipe 10 is connected to the other end of the circulating water side filter pipe 9. The other end of the circulating water side filter pipe 9 is connected to the sewage well. The bottom of the filter cylinder 15 is connected to the drain pipe 11, which is connected to the clear water tank. A fifth valve 5 is installed on the drain pipe 11.

[0021] The other end of the backwash nitrogen pipe 14 is connected to the lower part of the inner cavity of the filter cylinder 15. A third valve 3 is provided on the backwash nitrogen pipe 14. A pressure discharge pipe 13 is connected to the surface of the backwash nitrogen pipe 14. A seventh valve 7 is provided on the pressure discharge pipe 13. An overflow pipe 12 is connected to the top of the side wall of the filter cylinder 15. An eighth valve 8 is provided on the overflow pipe 12.

[0022] The first valve 1, the second valve 2, the third valve 3, the fourth valve 4, the fifth valve 5, and the sixth valve 6 are electric butterfly valves with open and closed status feedback; the seventh valve 7 is an electric small ball valve; and the eighth valve 8 is a manual ball valve.

[0023] Turn the manual knob of the first valve 1 on the field control cabinet to energize the solenoid valve of the first valve 1 and open the first valve 1 to fill the water filter with water. Manually open the eighth valve 8 to vent the air. When water flows out of the overflow pipe, close the eighth valve 8. Turn the manual knob of the first valve 1 on the control cabinet to de-energize the solenoid valve of the first valve 1 and close it, and fill the water filter with water.

[0024] Manually rotate the knobs of each valve on the control cabinet to energize and de-energize each valve's solenoid valve once, and check whether the feedback signals of the valve's open (closed) status can be correctly transmitted back to the PLC control cabinet.

[0025] The control knobs on the valves in the control cabinet can also be used to manually control the operation of each step of the filter.

[0026] Program operation (or manual operation of the control cabinet by turning the corresponding valve solenoid valve, time adjustable): Pre-filtration (3-5 minutes, adjustable) → Filtration (6-12 hours, adjustable) → Preliminary water flush (3 minutes) → Air flush (3-5 minutes, adjustable) → Air and water flush (5-10 minutes, adjustable) → Water flush (3-5 minutes, adjustable) → Pre-filtration.

[0027] When the program is in automatic operation mode (or when power is interrupted and then restored during automatic operation), all electric valves are closed, and then the program proceeds to the initial filtration step.

[0028] Pre-filtration: Open valve 1 and valve 6 and run for 3-5 minutes. Purpose: 1. To determine whether there are any damaged or leaking layers in the lower bed of the water filter media by detecting the presence of flocculent filter media debris in the sewage discharge; 2. To preliminarily judge the backwashing effect of the filter media by observing the clarity of the discharged water.

[0029] Filtration: Close the sixth valve 6 and open the fifth valve 5 (i.e., open the first valve 1 and the fifth valve 5). The system enters the water purification process and runs for 6 to 12 hours (the purification time can also be adjusted automatically according to the water quality analysis point of the water filter outlet pipe).

[0030] Preliminary water flushing: Close valve 1 and valve 5, open valve 2 and valve 4, and backwash for 3 minutes. (This allows the scaled filter media to float in the water and gradually loosen.) At this time, valve 7 is energized and opened, reducing the pressure of the backflushing air source to about 0.1 MPa (if the pipeline pressure is high, the diameter of the laid gas pipe can be reduced), preparing for air flushing (to prevent severe water hammer and damage to the filter bed).

[0031] Air flushing: Close the second valve 2 and open the third valve 3 (i.e., open the third valve 3 and the fourth valve 4), and air flush for 3-5 minutes. (This further disperses and loosens the filter media suspended in the water).

[0032] Air and water flushing: Open the second valve 2 (i.e., open the second valve 2, the third valve 3, and the fourth valve 4), and flush with air and water for 5 to 10 minutes to clean and remove the sludge and other impurities adsorbed by the filter media.

[0033] Water flushing: Close the third valve 3 (i.e., open the second valve 2 and the fourth valve 4) to reinforce the backwashing effect.

[0034] Pre-filtration: Close valve 2 and valve 4, open valve 1 and valve 6, and perform pre-filtration for 3-5 minutes (check the backwashing effect of the filter media).

[0035] Automatic switching of flushing modes can fully leverage their combined advantages and improve cleaning effectiveness. Under different water quality and filtration conditions, the types and degrees of dirt on the filter screen may vary. Automatic switching of flushing modes can flexibly adjust according to actual needs, ensuring that the filter screen is thoroughly cleaned under various operating conditions, reducing the need for manual intervention and lowering the workload and labor intensity of maintenance personnel.

[0036] The system automatically adjusts flushing parameters, such as flushing time and flushing intensity, based on water quality and filtration effect to avoid over-flushing or under-flushing. This reduces water consumption and equipment wear, improves cleaning effect, reduces dirt accumulation on the filter screen, extends the service life of the filter screen and equipment, reduces the cost of replacing the filter screen and equipment, and fully utilizes the adsorption and filtration performance.

[0037] Furthermore, an electric contact pressure gauge 23 is provided on the surface of the backwash nitrogen pipe 14, the pressure relief pipe 13 is located between the third valve 3 and the electric contact pressure gauge 23, a steel support 20 is fixedly connected to the lower part of the inner wall of the filter cylinder 15, a perforated stainless steel mesh plate 21 is provided on the upper surface of the steel support 20, a fine stainless steel wire mesh 19 is provided on the upper surface of the perforated stainless steel mesh plate 21, and a comet-shaped fiber filter media 18 is provided on the upper surface of the fine stainless steel wire mesh 19.

[0038] Furthermore, an electrical contact pressure gauge 23 is also installed in the upper part of the inner cavity of the filter cylinder 15, and the on / off signal is connected to the program control logic. The electrical contact pressure gauge on the filter cylinder 15 can be used (or disconnected and not used) to control the filter layer resistance of the water filter.

[0039] When the filter starts running, the gauge reading is low. As the amount of dirt adsorbed by the filter media increases, the resistance of the filter media layer increases, the inlet flow rate begins to exceed the outlet flow rate, and the pressure reading on the cylinder pressure gauge begins to rise. When the pressure exceeds the set value, the electrical contact signal is connected and sent to the program control. The program automatically shuts off the solenoid valves (first valve 1 and fifth valve 5) that are running in the filtration state, and energizes the second valve 2 and the fourth valve 4 in the water washing state, switching to backwash control.

[0040] Furthermore, a perforated stainless steel tube 16 is fixedly connected to the top of the inner wall of the filter cylinder 15, and the perforated stainless steel tube 16 covers the outside of the other end of the guide tube 17.

[0041] Furthermore, a maintenance manhole 22 is provided in the middle of the side wall of the filter cylinder 15.

[0042] The working principle and usage process of this utility model: After the utility model is installed, open the first valve 1 and the sixth valve 6 and run for 3 to 5 minutes. Objectives: 1. To determine whether there are any defects or leaks in the lower bed of the water filter media by detecting the presence of flocculent filter media debris in the sewage discharge. 2. To preliminarily judge the backwashing effect of the filter media by observing the clarity of the discharged water. Close the sixth valve 6 and open the fifth valve 5 (i.e., open the first valve 1 and the fifth valve 5). The system enters the water purification process and runs for 6-12 hours (the purification time can also be adjusted automatically based on the water quality analysis at the water filter outlet pipe). Close the first valve 1 and the fifth valve 5, and open the second valve 2 and the fourth valve 4. Backwash for 3 minutes (so that the scaled filter media floats in the water and gradually loosens). At this time, the seventh valve 7 is energized and opened, reducing the pressure of the backwash air source to about 0.1 MPa (when the pipeline pressure is high, the diameter of the laid air pipe can be reduced) to prepare for air flushing (to prevent severe water hammer and breakage of the cylinder bed). Close the second valve 2 and open the third valve 3 (i.e., open the third valve 3 and the fourth valve 4). Air flush for 3-5 minutes. (To further loosen and disperse the filter media suspended in the water), open the second valve 2 (i.e., open the second valve 2, the third valve 3, and the fourth valve 4), and flush with air and water for 5-10 minutes to clean and remove the sludge and other impurities adsorbed by the filter media. Close the third valve 3 (i.e., open the second valve 2 and the fourth valve 4) to consolidate the backwashing effect. Close the second valve 2 and the fourth valve 4, and open the first valve 1 and the sixth valve 6 for initial filtration for 3-5 minutes (to check the backwashing effect of the filter media).

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic switching circulating water intelligent filter system, comprising a circulating water bypass filter pipe (9), a filter cylinder (15) and a backwashing nitrogen gas pipe (14), characterized in that: The circulating water side filter pipe (9) is respectively provided with a first valve (1) and a fourth valve (4). The surface of the circulating water side filter pipe (9) is connected to a guide pipe (17) located between the first valve (1) and the fourth valve (4). The other end of the guide pipe (17) is connected to the top of the inner cavity of the filter cylinder (15). One end of the circulating water side filter pipe (9) is connected to a connecting pipe (10), the other end of the connecting pipe (10) is connected to the other end of the circulating water side filter pipe (9), the other end of the circulating water side filter pipe (9) is connected to a sewage well, the bottom of the filter cylinder (15) is connected to a drain pipe (11) connected to a clear water tank, and a fifth valve (5) is provided on the drain pipe (11); The other end of the backwash nitrogen pipe (14) is connected to the lower part of the inner cavity of the filter cylinder (15). A third valve (3) is provided on the backwash nitrogen pipe (14). A pressure relief pipe (13) is connected to the surface of the backwash nitrogen pipe (14). A seventh valve (7) is provided on the pressure relief pipe (13).

2. The automatic switching recirculating water intelligent filter system of claim 1, wherein: An electric contact pressure gauge (23) is provided on the surface of the backwash nitrogen pipe (14), and the pressure relief pipe (13) is located between the third valve (3) and the electric contact pressure gauge (23).

3. The automatic switching recirculating water intelligent filter system of claim 1, wherein: The top of the side wall of the filter cylinder (15) is connected to an overflow pipe (12), and an eighth valve (8) is provided on the overflow pipe (12).

4. The automatic switching recirculating water intelligent filter system of claim 1, wherein: A perforated stainless steel tube (16) is fixedly connected to the top of the inner wall of the filter cylinder (15), and the perforated stainless steel tube (16) covers the outside of the other end of the guide tube (17).

5. The automatic switching recirculating water intelligent filter system of claim 1, wherein: A steel support (20) is fixedly connected to the lower part of the inner wall of the filter cylinder (15). A perforated stainless steel mesh plate (21) is provided on the upper surface of the steel support (20). A fine stainless steel wire mesh (19) is provided on the upper surface of the perforated stainless steel mesh plate (21). A comet-shaped fiber filter media (18) is provided on the upper surface of the fine stainless steel wire mesh (19).

6. An automatic switching recirculating water intelligent filter system as described in claim 1, further comprising: A maintenance manhole (22) is provided in the middle of the side wall of the filter cylinder (15).

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