Integrated groundwater treatment device

Abstract

The utility model belongs to underground water processing technical field, concretely relates to integrated treatment device of underground water. Including the filter that washes itself, bag type filter, ion exchanger, sedimentation tank, sand filter tank and disinfection tank that connect in proper order, ion exchanger's export is equipped with water quality detector, still including the regeneration system that links to each other with ion exchanger, and the regeneration system includes the brine tank, brine pump and brine filter that connect in proper order, and brine filter's export links to each other with ion exchanger's regeneration liquid import, ion exchanger and the cleaning fluid export of filter that washes itself links to each other with denitrification filter bed respectively, and the export of denitrification filter bed is connected to brine tank recycling through pipeline, still including PLC control system. Through PLC control system coordination each processing unit, realize the efficient removal of underground water suspended solids and nitrate nitrogen, utilize regeneration system to promote resin utilization rate simultaneously, through denitrification filter bed recycling cleaning fluid, reach the purpose that the treatment effect is stable, the resource is saved.

Description

Technical Field

[0001] This utility model belongs to the field of groundwater treatment technology, specifically relating to an integrated groundwater treatment device. Background Technology

[0002] Groundwater, as an important water source, often contains various impurities such as suspended solids, particulate matter, colloids, and nitrate nitrogen. If it enters a water treatment plant directly without treatment, large suspended particles will clog subsequent treatment equipment, reducing treatment efficiency; particulate matter and colloids may affect coagulation and sedimentation, leading to turbidity; and excessive nitrate nitrogen not only fails to meet drinking water standards but may also harm human health. Therefore, groundwater must undergo pretreatment before entering a water treatment plant to remove impurities, reduce turbidity, and remove harmful ions, ensuring the smooth operation of subsequent treatment processes and the safety of the treated water.

[0003] Existing groundwater treatment facilities suffer from several problems: First, the automation level of the treatment process is low, and the adjustment of operating parameters of each treatment unit relies on manual operation, making precise control difficult and resulting in unstable treatment effects. Second, the ion exchanger regeneration system is incomplete, and the preparation and transportation of brine during the regeneration process lack precise control, which not only wastes salt resources but may also affect the regeneration effect of ion exchange resins and shorten their service life. Third, the cleaning solution is improperly treated, with the cleaning solution from self-cleaning filters and ion exchangers being directly discharged, causing water waste and potentially polluting the environment. Fourth, the coordination between multiple treatment units is poor, making it impossible to adjust treatment parameters in real time according to changes in water quality, resulting in low treatment efficiency.

[0004] Therefore, it is crucial to develop an integrated groundwater treatment device that can achieve automated control, improve regeneration efficiency, reduce resource waste, and provide stable treatment results. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an integrated groundwater treatment device. Through an automated PLC control system, the device coordinates the work of each treatment unit (self-cleaning filter, bag filter, ion exchanger, etc.) to achieve efficient removal of suspended solids and nitrate nitrogen from groundwater. At the same time, the device utilizes a regeneration system to improve resin utilization and recovers cleaning liquid through a denitrification filter bed, thereby achieving stable treatment effect and saving resources.

[0006] This utility model is achieved using the following technical solution:

[0007] The integrated groundwater treatment device includes a self-cleaning filter, a bag filter, an ion exchanger, a sedimentation tank, a sand filter, and a disinfection tank connected in sequence. The inlet of the self-cleaning filter is connected to a groundwater well via a booster pump. A water quality analyzer is installed at the outlet of the ion exchanger. The device also includes a regeneration system connected to the ion exchanger, comprising a brine tank, a brine pump, and a brine filter connected in sequence. The outlet of the brine filter is connected to the regeneration liquid inlet of the ion exchanger. The cleaning liquid outlets of the ion exchanger and the self-cleaning filter are respectively connected to a denitrification filter bed. The outlet of the denitrification filter bed is connected to the inlet of the brine tank via a pipeline. The denitrification filter bed treats the cleaning liquid, removing harmful substances and enabling its recycling, thus saving water resources and reducing wastewater discharge. A PLC control system is also included.

[0008] The outlet of the disinfection pool is connected to the clear water pool.

[0009] The water quality analyzer and brine pump are electrically connected to the PLC control system.

[0010] The ion exchanger is filled with ion exchange resin. Nitrate nitrogen is removed by adsorption of the ion exchange resin. A water quality analyzer can monitor the effluent quality in real time, and the regeneration system is activated when the water quality fails to meet standards. The regeneration system allows the ion exchange resin to be reused, extending its service life, reducing operating costs, and achieving highly efficient removal of nitrate nitrogen from groundwater.

[0011] The brine tank is connected to a salt addition pipeline and a water addition pipeline, both of which are equipped with electric valves controlled by a PLC control system. By precisely preparing the brine concentration, and ensuring the delivery and cleanliness of the brine through a brine pump and filter, efficient regeneration of the ion exchange resin is achieved, improving resin utilization and reducing operating costs.

[0012] The self-cleaning filter is connected to a backwash water pipeline, and an electric valve controlled by a PLC control system is installed on the backwash water pipeline.

[0013] The self-cleaning filter is equipped with differential pressure sensors connected across its inlet and outlet, and these sensors are electrically connected to the PLC control system. The differential pressure sensors monitor the pressure difference before and after filtration in real time. When the pressure difference reaches a set value, the PLC controls the electric valve to open for automatic backwashing. This eliminates the need for manual operation, achieving automatic cleaning of the filter, ensuring stable filtration performance, reducing manual maintenance costs, and protecting the normal operation of downstream equipment.

[0014] The working principle of the integrated groundwater treatment device is as follows:

[0015] Groundwater enters the self-cleaning filter from a groundwater well, where the filter screen directly intercepts impurities, removing large suspended solids and particulate matter and reducing turbidity. The backwash water line of the self-cleaning filter is equipped with an electric valve controlled by a PLC control system. Differential pressure sensors are connected to the inlet and outlet. When the differential pressure reaches a set value, the PLC control system automatically opens the electric valve on the backwash water line to perform backwashing, initially purifying the water and protecting downstream system equipment for normal operation.

[0016] Water from the self-cleaning filter enters the bag filter, where particles, colloids, and suspended solids leaking from the self-cleaning system are trapped, preventing large particles from entering the subsequent ion exchange system.

[0017] The effluent from the bag filter enters the ion exchanger, where the nitrate nitrogen in the water is adsorbed and ion exchanged using the nitrate ion exchange resin filled inside. When the resin's exchange sites are saturated, the ion exchanger needs regeneration. During regeneration, a brine solution with a concentration of 8%-10% is prepared in the brine tank via salt and water supply lines. The electric valves on the salt and water supply lines are controlled by a PLC system to precisely control the amount of salt and water added. The prepared brine solution is pumped to the brine filter, where larger particles are filtered out, before entering the ion exchanger for regeneration. After treatment by the ion exchanger, the nitrate (as nitrogen) in the water is reduced from 10-15 mg / L to below 1 mg / L, and the treated water then enters the sedimentation tank.

[0018] The permeate water undergoes sedimentation in a sedimentation tank to remove fine suspended solids and colloids. The effluent from the sedimentation tank then enters a sand filter, which uses quartz sand as the filter media, to further remove fine impurities and suspended solids. The effluent from the sand filter then enters a disinfection tank where a disinfectant (such as sodium hypochlorite) is added. After disinfection, the water enters a clear water tank and is then transported to the water supply plant for further treatment.

[0019] The cleaning solutions from the self-cleaning filters and ion exchangers are respectively piped into the denitrification filter bed. The denitrification filter bed is filled with biological packing material, and through denitrification in an anaerobic environment, harmful substances such as nitrate nitrogen in the cleaning solution are converted into nitrogen gas and released, while simultaneously removing suspended solids and organic matter. The treated cleaning solution flows through the denitrification filter bed outlet pipe into the inlet of the brine tank, achieving resource recovery of the cleaning solution.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] The integrated groundwater treatment device described in this invention forms a complete treatment process by sequentially connecting self-cleaning filters, bag filters, and ion exchangers. It efficiently removes suspended solids, particulate matter, nitrate nitrogen, and other impurities from groundwater, reducing nitrate (as nitrogen) levels from 10-15 mg / L to below 1 mg / L, meeting the requirements of subsequent water treatment plants. The introduction of a PLC control system automates the control of components such as water quality analyzers, brine pumps, and electric valves in various pipelines. Operating parameters are adjusted in real time based on water quality data and differential pressure sensor signals, eliminating the need for manual intervention and improving the accuracy and stability of the treatment process. The rational configuration of the brine tank, brine pump, and brine filter in the regeneration system ensures precise brine preparation and filtration, improving the regeneration efficiency of the ion exchange resin, extending its lifespan, and reducing operating costs. The cleaning solution from the ion exchanger and self-cleaning filter is treated by the denitrification filter bed and then connected to the brine tank of the regeneration system, enabling the recycling of the cleaning solution, saving water resources, and reducing wastewater discharge. The various treatment units work together and can automatically adjust their treatment strategies according to changes in water quality, significantly improving the efficiency and quality of groundwater treatment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the integrated groundwater treatment device described in this utility model;

[0023] In the diagram: 1. Self-cleaning filter; 2. Bag filter; 3. Ion exchanger; 4. Sedimentation tank; 5. Sand filter; 6. Disinfection tank; 7. Groundwater well; 8. Water quality analyzer; 9. Brine tank; 10. Brine pump; 11. Brine filter; 12. Denitrification filter bed; 13. Clear water tank; 14. Ion exchange resin; 15. Salt supply line; 16. Water supply line; 17. Backwash water line; 18. Differential pressure sensor. Detailed Implementation

[0024] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] Example 1

[0026] like Figure 1As shown, the integrated groundwater treatment device includes a self-cleaning filter 1, a bag filter 2, an ion exchanger 3, a sedimentation tank 4, a sand filter 5, and a disinfection tank 6 connected in sequence. The inlet of the self-cleaning filter 1 is connected to a groundwater well 7. A water quality analyzer 8 is installed at the outlet of the ion exchanger 3. The device also includes a regeneration system connected to the ion exchanger 3, which includes a brine tank 9, a brine pump 10, and a brine filter 11 connected in sequence. The outlet of the brine filter 11 is connected to the regeneration liquid inlet of the ion exchanger 3. The cleaning liquid outlets of the ion exchanger 3 and the self-cleaning filter 1 are respectively connected to a denitrification filter bed 12. The outlet of the denitrification filter bed 12 is connected to the inlet of the brine tank 9 through a pipeline. The device also includes a PLC control system.

[0027] The outlet of the disinfection pool 6 is connected to the clear water pool 13.

[0028] The water quality analyzer 8 and the brine pump 10 are electrically connected to the PLC control system.

[0029] The ion exchanger 3 is filled with ion exchange resin 14.

[0030] The brine tank 9 is connected to a salt addition pipeline 15 and a water addition pipeline 16, and electric valves controlled by a PLC control system are installed on the salt addition pipeline 15 and the water addition pipeline 16.

[0031] The self-cleaning filter 1 is connected to a backwash water pipeline 17, and the backwash water pipeline 17 is equipped with an electric valve controlled by a PLC control system.

[0032] The inlet and outlet of the self-cleaning filter 1 are connected to differential pressure sensors 18, which are electrically connected to the PLC control system.

[0033] The integrated groundwater treatment device operates as follows:

[0034] First, groundwater enters the self-cleaning filter 1 from groundwater well 7. The filter screen intercepts large suspended particles. When the inlet and outlet pressure difference reaches 0.3 MPa, the PLC controls the electric valve of the backwash water pipeline 17 to open, flushing for 30 minutes at a water pressure of 0.25 ± 0.05 MPa. Then, the effluent enters the bag filter 2, which traps 7.5 ± 2.5 μm particles, with the filtration flow rate controlled at 5 m / h. Next, it flows into the ion exchanger 3, where nitrate ion exchange resin 14 adsorbs nitrate nitrogen at a flow rate of 10 m / h and a temperature of 25°C. When saturated, the brine tank 9 prepares a 10% concentration brine solution via an electric valve, which is then pumped by the brine pump 10 at a flow rate of 1 m / h to the brine filter 11. After filtration, the resin is regenerated for 60 minutes, and the nitrate (as N) in the permeate is reduced to below 1 mg / L. The permeate then enters the sedimentation tank 4 for sedimentation for 2 hours. Subsequently, it flows into the sand filter tank 5, where the quartz sand filter layer is filtered for 12 hours at a flow rate of 8 m / h, resulting in an effluent turbidity of <1 NTU. Finally, 2 mg / L of sodium hypochlorite is added to the disinfection tank 6, and after contact for 30 minutes, the solution enters the clear water tank 13 and is then transported to the water supply plant.

[0035] The cleaning solutions from the self-cleaning filter 1 and ion exchanger 3 are respectively discharged into the denitrification filter bed 12 through pipelines to carry out the denitrification reaction, converting nitrate nitrogen into nitrogen gas, while simultaneously filtering out suspended solids. The treated water is then transported through the outlet pipeline of the denitrification filter bed 12 to the inlet of the brine tank 9 for recycling and reuse.

Claims

1. An integrated groundwater treatment device, characterized in that, The system includes a self-cleaning filter (1), a bag filter (2), an ion exchanger (3), a sedimentation tank (4), a sand filter (5), and a disinfection tank (6) connected in sequence. The inlet of the self-cleaning filter (1) is connected to a groundwater well (7). The outlet of the ion exchanger (3) is equipped with a water quality tester (8). The system also includes a regeneration system connected to the ion exchanger (3), which includes a brine tank (9), a brine pump (10), and a brine filter (11) connected in sequence. The outlet of the brine filter (11) is connected to the regeneration liquid inlet of the ion exchanger (3). The cleaning liquid outlets of the ion exchanger (3) and the self-cleaning filter (1) are respectively connected to a denitrification filter bed (12). The outlet of the denitrification filter bed (12) is connected to the inlet of the brine tank (9) through a pipeline. The system also includes a PLC control system.

2. The integrated groundwater treatment device according to claim 1, characterized in that, The outlet of the disinfection pool (6) is connected to the clear water pool (13).

3. The integrated groundwater treatment device according to claim 1, characterized in that, The water quality analyzer (8) and the brine pump (10) are electrically connected to the PLC control system.

4. The integrated groundwater treatment device according to claim 1, characterized in that, The ion exchanger (3) is filled with ion exchange resin (14).

5. The integrated groundwater treatment device according to claim 1, characterized in that, The brine tank (9) is connected to a salt supply line (15) and a water supply line (16), and the salt supply line (15) and the water supply line (16) are equipped with electric valves controlled by a PLC control system.

6. The integrated groundwater treatment device according to claim 1, characterized in that, The self-cleaning filter (1) is connected to a backwash water line (17), and the backwash water line (17) is equipped with an electric valve controlled by a PLC control system.

7. The integrated groundwater treatment device according to claim 6, characterized in that, The self-cleaning filter (1) is connected to a differential pressure sensor (18) at its inlet and outlet, and the differential pressure sensor (18) is electrically connected to the PLC control system.

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