A wastewater resin capture device

Abstract

The utility model discloses a wastewater resin capturing device belongs to wastewater treatment field, including the barrel, the inner chamber of barrel is divided into upper layer inner chamber and lower layer inner chamber by the partition, upper layer inner chamber communicates wastewater inlet, upper layer inner chamber inner chamber bottom middle part is provided with the coarse filter element, the lower layer inner chamber inner chamber middle part is provided with the fine filter element, the bottom of fine filter element communicates wastewater outlet, wastewater outlet is located the bottom of barrel, the bottom of coarse filter element is linked with lower layer inner chamber, and the diameter value of fine filter element is less than the diameter value of coarse filter element, and through coarse filter element first intercepts most resin particles, and then through the fine filter element and retains the classification filtration design of remaining fine particle, realizes accurate, thorough capture to wastewater resin, effectively avoids resin particles into subsequent equipment or with water discharge, guarantees that the water quality reaches the standard again, prevents the follow -up pipeline, precision equipment blockage, reduces system failure risk.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and specifically relates to a wastewater resin capture device. Background Technology

[0002] In industrial wastewater treatment, materials such as ion exchange resins are widely used in water purification and heavy metal removal. However, after long-term use, resins can experience wear, breakage, aging, and failure, leading to the shedding of failed resin particles or fragments into the wastewater.

[0003] If these detached resin particles are directly introduced into subsequent treatment units with the wastewater, it will cause a series of problems: blockage of subsequent pipelines, valves and precision treatment equipment, reduce the operating efficiency of the treatment system, increase equipment maintenance costs, and the resin particles may adsorb harmful substances, which will cause secondary pollution if discharged with wastewater, affecting the effluent water quality to meet standards. If a traditional single filtration structure is used, there are problems such as insufficient filtration accuracy or easy clogging, and the reliance on manual monitoring of the filter element status makes it impossible to detect potential clogging in time, resulting in unstable filtration effect and difficulty in achieving continuous and efficient resin capture. Utility Model Content

[0004] The purpose of this invention is to provide a wastewater resin capture device to solve the problems of insufficient filtration accuracy or easy clogging in traditional single filtration structures, and the difficulty in timely detection of potential clogging hazards due to reliance on manual monitoring, resulting in low resin capture efficiency and difficulty in ensuring the quality of effluent.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wastewater resin capture device, comprising a cylinder, wherein the inner cavity of the cylinder is divided into an upper inner cavity and a lower inner cavity by a partition, the upper inner cavity is connected to a wastewater inlet, a coarse filter element is provided at the bottom center of the upper inner cavity, a fine filter element is provided at the center of the lower inner cavity, the bottom of the fine filter element is connected to a wastewater outlet, and the wastewater outlet is located at the bottom of the cylinder;

[0006] The bottom of the coarse filter element is connected to the inner cavity of the lower layer, and the diameter of the fine filter element is smaller than that of the coarse filter element. Wastewater passes through the coarse filter element and the fine filter element from the outside to the inside.

[0007] Both the fine-stage filter element and the coarse-stage filter element are fitted onto the gas-water mixing pulse generator. Both the fine-stage filter element and the coarse-stage filter element are equipped with a detector group, which is used to detect pressure difference and liquid level. Both the detector group and the gas-water mixing pulse generator are connected to a PLC controller.

[0008] Furthermore, the cylinder body is made of carbon steel lined with rubber.

[0009] Furthermore, the wastewater inlet is located on one side of the bottom of the upper inner cavity of the cylinder.

[0010] Furthermore, the pore gap of the coarse filter element is 0.4-0.5mm, and the filtration rate of the coarse filter element is set within 10~12m / h.

[0011] Furthermore, the pore gap of the fine filter element is 0.20-0.25mm, and the filtration rate of the fine filter element is set within 8~10m / h.

[0012] Furthermore, both the upper and lower inner cavities are provided with drain outlets.

[0013] Furthermore, detector groups are installed on both the inner and outer sides of the fine filter element and the coarse filter element, and the detector groups include differential pressure sensors and liquid level sensors.

[0014] Furthermore, the data collected by the detector group is transmitted to the PLC controller in real time, and the PLC controller can control the start and stop of the gas-water mixing pulse generator according to the data collected by the detector group.

[0015] Furthermore, the inside of the cylinder is backwashed with clean water. The backwash water flow rate (m³ / h) = total external surface area of ​​the filter element (m²) × backwash intensity, and the backwash time is set to 60s-180s.

[0016] Furthermore, the pulse frequency of the pulse generator is set to 60~300 times / minute.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This wastewater resin capture device employs a graded filtration design that uses a coarse filter element to intercept most of the resin particles, followed by a fine filter element to retain the remaining fine particles. This design achieves precise and thorough capture of wastewater resin, effectively preventing resin particles from entering subsequent equipment or being discharged with the water. It ensures that the effluent water quality meets standards and prevents blockages in subsequent pipelines and precision equipment, thus reducing the risk of system failure.

[0019] In this wastewater resin capture device, both the coarse and fine filter elements are connected to an air-water mixed pulse generator. The PLC controller can intelligently adjust the pulse frequency and intensity according to the severity of clogging. The filter elements are backwashed with high-frequency air-water mixed pulses, which can quickly and powerfully remove the attached resin impurities. The backwashing effect is better than the traditional flushing method. At the same time, it avoids over-flushing, saves water and air resources, and reduces operating costs.

[0020] This wastewater resin capture device is equipped with differential pressure sensors and liquid level sensors on both the inner and outer sides of the two-stage filter elements. The data is transmitted to the PLC controller in real time. The controller analyzes the rate and trend of differential pressure and liquid level changes through intelligent algorithms. It can provide early warnings before the filter elements reach the critical point of blockage and recommend the best backwashing time. This replaces traditional manual monitoring, avoids the decrease in filtration efficiency or equipment damage caused by monitoring lag, realizes predictive maintenance, and reduces unplanned downtime. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a wastewater resin capture device.

[0022] In the diagram: 1. Cylinder; 11. Upper inner cavity; 12. Lower inner cavity; 2. Wastewater inlet; 3. Coarse filter element; 4. Fine filter element; 5. No. 1 drain outlet; 6. No. 2 drain outlet; 7. Wastewater outlet; 81. Differential pressure sensor; 82. Liquid level sensor; 9. Gas-water mixing pulse generator; 10. PLC controller. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments.

[0024] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0025] Please see Figure 1 This utility model provides a wastewater resin capture device, including a cylinder 1. The cylinder 1 is made of carbon steel lined with rubber. The interior of the cylinder 1 is divided into an upper inner cavity 11 and a lower inner cavity 12 by a horizontally arranged partition.

[0026] Wastewater inlet 2 is provided on one side of the cylinder 1. Wastewater inlet 2 is located on one side of the bottom of the upper inner cavity 11 of the cylinder 1. Wastewater inlet 2 is used to send wastewater into the upper inner cavity 11.

[0027] A coarse filter element 3 is installed at the bottom center of the upper inner cavity 11. The filter pores of the coarse filter element 3 have a gap of 0.4-0.5mm. The coarse filter element 3 is used to intercept most of the resin and larger debris, and bears the main load. The coarse filter element 3 is backwashed frequently but with a small pressure drop. The bottom of the coarse filter element 3 is connected to the lower inner cavity 12.

[0028] A fine filter element 4 is installed in the middle of the lower inner cavity 12. The filter pores of the fine filter element 4 have a gap of 0.20-0.25mm, serving as the final protection. Since the coarse filter element 3 bears most of the load, the fine filter element 4 clogs very slowly. The diameter of the fine filter element 4 is smaller than that of the coarse filter element 3. The bottom of the fine filter element 4 is connected to the wastewater outlet 7, which is located at the bottom of the cylinder 1 and is used to discharge the filtered wastewater.

[0029] Coarse filter element 3 (first stage): As the main filtration unit, its filtration rate setting determines the processing capacity of the entire device. Coarse filter element 3 (first stage) bears the main load. While ensuring the filtration effect, its processing capacity should be fully utilized. Therefore, it is set in the range of 10~12m / h.

[0030] Fine filter element 4 (second stage): Since the water flow is already relatively clean after the first stage of filtration, and the second stage filter element has higher precision and requires more protection, its filtration speed can be set in the range of 8~10m / h, which helps to reduce its operating pressure difference and extend the backwash cycle.

[0031] Setting the filtration rate of a two-stage filter element requires balancing processing capacity and operating cycle. Too high a filtration rate will cause a sharp increase in differential pressure, necessitating frequent backwashing; too low a filtration rate will require a larger equipment size, which is uneconomical.

[0032] A first drain outlet 5 and a second drain outlet 6 are respectively provided on one side of the bottom of the upper inner cavity 11 and the lower inner cavity 12. Both the first drain outlet 5 and the second drain outlet 6 are connected to the drain pipe. The first drain outlet 5 and the second drain outlet 6 are used to intercept resin and debris for discharge.

[0033] High-precision differential pressure sensors 81 and liquid level sensors 82 are installed on both the inner and outer sides of the fine filter element 4 and the coarse filter element 3. The resin clogging status is determined by the differential pressure and liquid level.

[0034] Both the fine filter element 4 and the coarse filter element 3 are fitted onto the air-water mixing pulse generator 9. The air-water mixing pulse generator 9 is composed of a high-speed variable frequency solenoid valve that opens and closes dozens to hundreds of times per minute. It efficiently mixes the compressed air and water connected to the device to form a uniform air-water mixture, which is then sent into the pulse generator to enter the fine filter element 4 and the coarse filter element 3 for backwashing. The frequency can be adjusted according to the degree of blockage.

[0035] The compressed air pressure range can be set to: 0.3~0.6MPa (approximately 3~6 bar);

[0036] Lower limit 0.3MPa: The pressure must be sufficient to overcome the system back pressure and generate enough impact force to cause the filter element to vibrate slightly, effectively loosening the resin; Upper limit 0.6MPa: Must be lower than the design pressure limit of the trap body 1, filter element and related pipes and valves. Excessive pressure will produce too violent an impact, which may damage the precision filter element (especially the fine filter element) and accelerate the breakage of the resin.

[0037] The external clean water pressure range should be set at 0.2~0.4MPa (approximately 2~4 bar); the clean water pressure is usually slightly lower than or equal to the air pressure. Excessive water pressure will dilute the "pulse rigidity" of the air-water mixture, making it more prone to continuous flow and weakening the impact effect. The pressure must ensure sufficient flow velocity during discharge to quickly carry away resin fragments and prevent their deposition in the drain pipe.

[0038] The flow rate of air-water mixed pulse backwash: At this time, the water flow rate is no longer a stable value, but pulsed. Its instantaneous peak flow rate will be much higher than the filtration rate. The backwash water flow rate is usually set in terms of "backwash intensity", which is set between 8 and 15 m³ / (m²·h). This intensity needs to work in conjunction with the compressed air pulse to ensure sufficient shear force to peel off the resin and carry it out smoothly.

[0039] The backwash water flow rate needs to be calculated based on the surface area of ​​the filter element. Backwash water flow rate (m³ / h) = total external surface area of ​​the filter element (m²) × backwash intensity. If the flow rate is too low, it will not be able to effectively remove impurities; if the flow rate is too high, it will waste water resources and may shorten the effective backwash time.

[0040] The pulse generator pulse frequency is set to: 60~300 times / minute (1~5Hz); Low frequency (e.g., 1-2Hz): strong impact force, suitable for severe blockage and firm resin adhesion. High frequency (e.g., 4-5Hz): high impact frequency, forming continuous oscillation, suitable for routine maintenance or minor blockage, and gentler on the resin. Intelligent adjustment: The PLC system can intelligently select the frequency according to the rate of pressure difference increase. A rapid increase in pressure difference indicates a strong blockage, in which case the "low frequency, high intensity" mode can be used; a slow increase allows for energy-saving maintenance using the "high frequency, low intensity" mode.

[0041] Pulse duration: This refers to the duration of each solenoid valve opening, set between 0.1 and 0.5 seconds. If the time is too short, the pulse energy is insufficient; if the time is too long, it becomes close to continuous flushing, losing the pulse effect.

[0042] The backwashing time can be set to 60s-180s depending on the differential pressure of the filter element.

[0043] The differential pressure sensor 81, liquid level sensor 82, and gas-water mixing pulse generator 9, through the PLC controller 10, utilize an intelligent learning algorithm to establish a blockage model. This model predicts blockage conditions not only based on absolute pressure difference and liquid level height, but also on the rate and trend of pressure difference and liquid level rise. It can issue early warnings before the blockage reaches a critical point and recommend the optimal backwashing time. Furthermore, it learns the relationship between unit load, water quality fluctuations, and resin leakage patterns to achieve proactive adjustment.

[0044] The working principle of this utility model is as follows: Wastewater inlet: Wastewater containing degraded resin and impurities enters the device from the wastewater inlet 2 located in the middle of the cylinder 1.

[0045] First-stage coarse filter element 3: Wastewater first passes through coarse filter element 3 from the outside to the inside. The vast majority (more than 95%) of resin particles and larger fragments are intercepted here and accumulate on the outer surface of coarse filter element 3.

[0046] Second-stage fine filter element 4: After coarse filtration, the water flows into the lower inner cavity 12 and continues to flow from the outside to the inside through the fine filter element 4.

[0047] The coarse filter element 3 (0.25-0.35mm pore size) first intercepts over 95% of large resin particles and impurities in an "outside-in" manner, directly bearing the main filtration load and preventing premature clogging of the fine filter element 4 (0.20-0.25mm pore size). The fine filter element 4 then filters "outside-in" in the same manner, accurately capturing fine particles that penetrate the coarse filter, forming a stepped interception process that significantly improves the overall resin removal rate and ensures stable and compliant effluent quality. Impurities are concentrated on the outside of the filter elements, facilitating rapid monitoring of clogging status via the differential pressure sensor 81. The PLC controller 10 accurately determines the degree of contamination in both filter stages, enabling targeted backwashing, reducing resource waste from ineffective backwashing, and lowering maintenance costs. During backwashing, a mixed air-water pulse is injected from the inside of the filter element, flowing in the opposite direction to the filtration flow. The impact force directly acts on the impurity adhesion layer, quickly stripping resin and debris. Combined with independent drain ports on the upper and lower layers, drainage is more thorough and backwashing time is shortened. Meanwhile, impurities attached to the outside will not enter the internal channels of the filter element, reducing the risk of filter element pore blockage, reducing wear on the filter element during backwashing, and extending the service life of the filter element.

[0048] Wastewater discharge: The final filtered wastewater is discharged through the wastewater outlet 7 at the bottom of the cylinder 1, and enters the subsequent treatment unit or is discharged after meeting the standards.

[0049] PLC control:

[0050] Data Acquisition: Differential pressure sensor 81 and liquid level sensor 82 monitor the pressure difference inside and outside the two-stage filter elements in real time, as well as the liquid level signal set inside the cylinder 1. The pressure difference is the most critical parameter, and its change directly reflects the degree of clogging of the filter elements.

[0051] Intelligent Analysis and Prediction: All sensor data is transmitted to the PLC control system in real time. The intelligent algorithm (AI or machine learning model) inside the PLC not only looks at the absolute values ​​of differential pressure and liquid level, but also analyzes the rate and trend of differential pressure and liquid level rise. It systematically learns and memorizes the leakage patterns of resin under different loads and start-up / shutdown conditions, thereby establishing an accurate blockage prediction model.

[0052] Early warning and decision-making: Before the differential pressure reaches the set upper limit (0.08MPa for coarse filters and 0.05MPa for fine filters, adjustable according to actual operating conditions), the system can predict the fouling trend of the filter elements and issue an early warning on the touchscreen, recommending the optimal backwashing time for predictive maintenance. Operators can manually start the backwashing, or the system can automatically initiate the backwash according to a preset program.

[0053] Cleaning: When the PLC determines that a certain filter element needs cleaning, the air-water mixing pulse generator 9 starts, automatically selecting the filter unit to be cleaned. The pulse generator activates, mixing compressed air and pressurized water instantaneously in the air-water mixer at a frequency of tens to hundreds of times per minute, and then injecting these high-speed, high-frequency pulses into the inner surface of the filter element (opposite to the normal wastewater flow direction). These high-frequency air-water pulses create intense turbulence and shear force, powerfully flushing the gaps in the filter element, instantly loosening and peeling off the resin layer adhering to the inner surface of the filter element. The PLC can intelligently adjust the frequency and intensity of the pulses (variable frequency control) according to the severity of the blockage. For minor blockages, a mild mode is used to conserve resources; for severe blockages, a high-intensity mode is used for thorough cleaning.

[0054] Sewage discharge: The stripped resin and debris are quickly discharged from the device through sewage outlet 5 or sewage outlet 6 respectively.

[0055] The above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description, and these obvious variations or modifications derived from the spirit of this utility model are still within the protection scope of this utility model.

Claims

1. A wastewater resin capture device, characterized in that: Includes a cylindrical body (1), the inner cavity of which is divided into an upper inner cavity (11) and a lower inner cavity (12) by a partition. The upper inner cavity (11) is connected to a wastewater inlet (2). A coarse filter element (3) is provided at the middle of the bottom of the upper inner cavity (11). A fine filter element (4) is provided at the middle of the lower inner cavity (12). The bottom of the fine filter element (4) is connected to a wastewater outlet (7). The wastewater outlet (7) is located at the bottom of the cylindrical body (1). The bottom of the coarse filter element (3) is connected to the lower inner cavity (12), and the diameter of the fine filter element (4) is smaller than that of the coarse filter element (3). Wastewater passes through the coarse filter element (3) and the fine filter element (4) from the outside to the inside. The fine filter element (4) and the coarse filter element (3) are both fitted onto the gas-water mixing pulse generator (9). The fine filter element (4) and the coarse filter element (3) are each equipped with a detector group. The detector group is used to detect pressure difference and liquid level. The detector group and the gas-water mixing pulse generator (9) are both connected to a PLC controller (10).

2. The wastewater resin capture device according to claim 1, characterized in that: The cylinder (1) is made of carbon steel lined with rubber.

3. The wastewater resin capture device according to claim 1, characterized in that: The wastewater inlet (2) is located on one side of the bottom of the upper inner cavity (11) of the cylinder (1).

4. The wastewater resin capture device according to claim 1, characterized in that: The pore gap of the coarse filter element (3) is 0.4-0.5mm, and the filtration rate of the coarse filter element (3) is set within 10~12m / h.

5. The wastewater resin capture device according to claim 1, characterized in that: The pore gap of the fine filter element (4) is 0.20-0.25mm, and the filtration rate of the fine filter element (4) is set within 8~10m / h.

6. The wastewater resin capture device according to claim 1, characterized in that: Both the upper inner cavity (11) and the lower inner cavity (12) are provided with sewage outlets.

7. The wastewater resin capture device according to claim 1, characterized in that: The fine filter element (4) and the coarse filter element (3) are equipped with detector groups on their inner and outer sides. The detector groups include a differential pressure sensor (81) and a liquid level sensor (82).

8. The wastewater resin capture device according to claim 7, characterized in that: The data collected by the detector group is transmitted to the PLC controller (10) in real time. The PLC controller (10) can control the start and stop of the gas-water mixing pulse generator (9) according to the data collected by the detector group.

9. The wastewater resin capture device according to claim 1, characterized in that: The interior of the cylinder (1) can be backwashed with clean water. The backwash water flow rate (m³ / h) = total external surface area of ​​the filter element (m²) × backwash intensity. The backwash time is set to 60s-180s.

10. A wastewater resin capture device according to claim 1, characterized in that: The pulse frequency of the pulse generator is set to 60~300 times / minute.

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