Mixed bed regeneration drain shunt recovery device and mixed bed regeneration drain system

Abstract

This application discloses a mixed-bed regeneration wastewater diversion and recycling device and a mixed-bed regeneration wastewater system. The mixed-bed regeneration wastewater diversion and recycling device includes: a three-way diversion valve, an inlet pipe connected to the wastewater pipe of the mixed bed, a first outlet pipe connected to an acid-base neutralization tank, and a second outlet pipe connected to a storage device; a total dissolved solids (TDS) analyzer for detecting the total dissolved solids content discharged from the wastewater pipe of the mixed bed during the replacement stage; and a control system that controls the three-way diversion valve to switch to the first or second outlet pipe based on the comparison result of the detected value and a preset threshold. This application uses a TDS analyzer to detect the total dissolved solids in the wastewater during the replacement stage, and the control system controls the outlet pipe of the three-way diversion valve to be open based on the comparison result of the detected value and a preset threshold, thereby achieving precise diversion and recycling of wastewater of different qualities, thereby improving water resource utilization and reducing wastewater treatment costs.

Description

Technical Field

[0001] This application generally relates to the field of industrial water treatment technology. More specifically, this application relates to a mixed-bed regeneration wastewater diversion and recovery device; further, this application also relates to a mixed-bed regeneration wastewater system. Background Technology

[0002] In demineralized water preparation systems in industries such as power generation and chemical processing, ion exchange mixed-bed regeneration is a crucial step in ensuring water quality. Existing regeneration processes include a displacement stage. Testing shows that in the early stages of this stage, the total dissolved solids (TDS) in the effluent reaches approximately 9000 mg / L, classifying it as high-salinity wastewater. Later, the TDS can be reduced to approximately 750 mg / L, significantly lower than the 1000 mg / L salinity standard for fresh water, indicating that the effluent at this stage has good recycling value. However, under current treatment methods, all effluent is mixed and discharged into an acid-base neutralization tank before ultimately entering the wastewater treatment system.

[0003] However, this treatment method not only wastes resources, but also increases the cost of wastewater treatment, leading to an increase in the operating costs of the entire system and affecting the company's economic performance and market competitiveness.

[0004] In view of this, there is an urgent need to provide a mixed bed regeneration wastewater diversion and recycling device and a mixed bed regeneration wastewater system solution in order to save resources and reduce wastewater treatment costs. Utility Model Content

[0005] In order to at least solve one or more of the technical problems mentioned above, this application proposes, in several aspects, a mixed bed regeneration wastewater diversion and recycling device and a mixed bed regeneration wastewater system capable of collecting and recycling qualified water.

[0006] In a first aspect, this application provides a mixed bed regeneration drainage diversion and recycling device, comprising: a three-way diversion valve, the inlet pipe of which is connected to the drainage pipe of the mixed bed, the first outlet pipe of which is connected to an acid-base neutralization tank, and the second outlet pipe of which is connected to a storage device;

[0007] A total dissolved solids (TDS) analyzer is used to detect the total dissolved solids content discharged from the drainage pipe of the mixed bed during the displacement stage; and a control system is connected to the TDS analyzer and the three-way diversion valve respectively, and controls the three-way diversion valve to switch to the first outlet pipe or the second outlet pipe according to the comparison result of the detection value of the TDS analyzer and the preset threshold.

[0008] In some embodiments, when the TDS analyzer detects a value greater than or equal to a preset threshold, the control system activates the first water outlet pipe; when the TDS analyzer detects a value less than the preset threshold, the control system activates the second water outlet pipe.

[0009] In some embodiments, the preset threshold is 800 mg / L.

[0010] In some embodiments, the drainage pipeline is used to transport the drainage generated by the mixed bed during the displacement phase.

[0011] In some embodiments, the storage device is a raw water tank used to recover wastewater with a total dissolved solids content that meets the standard and to supply water to the mixed bed.

[0012] In some embodiments, the TDS analyzer is installed on the drain pipe or the inlet pipe of the three-way diverter valve.

[0013] In a second aspect, this application also provides a mixed-bed regeneration drainage system, which includes the aforementioned mixed-bed regeneration drainage diversion and recovery device.

[0014] The mixed bed regeneration wastewater diversion and recycling device provided above allows for the detection of total dissolved solids (TDS) in the wastewater during the replacement phase using a TDS analyzer. The control system controls the flow of the outlet pipe of the three-way diversion valve based on the comparison between the detected value and a preset threshold, thereby achieving precise diversion and recycling of wastewater of different qualities, thus improving water resource utilization and reducing wastewater treatment costs. Attached Figure Description

[0015] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts, wherein:

[0016] Figure 1 A schematic diagram of a mixed-bed regeneration wastewater diversion and recycling device according to an embodiment of this application is shown;

[0017] Figure 2 A schematic diagram of a mixed-bed regeneration drainage system according to an embodiment of this application is shown.

[0018] In the diagram: 100, Mixed bed regeneration wastewater diversion and recovery device; 200, Mixed bed regeneration wastewater system;

[0019] 101. Mixed bed; 102. Three-way diverter valve; 103. TDS analyzer; 104. Control system; 105. Raw water tank; 106. Acid-base neutralization tank; 107. Drainage pipeline;

[0020] 201. Secondary reverse osmosis water tank; 202. Reclaimed water pump; 203. Demineralized water tank; 204. Ultrafiltration concentration tank; 205. Alkali metering tank; 206. Acid metering tank. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] It should be understood that the terms "comprising" and "including" used in the specification and claims of this application indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0023] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0024] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0025] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0026] like Figure 1As shown, in some embodiments, this application provides a mixed bed regeneration drainage diversion and recovery device 100, including: a three-way diversion valve 102, whose inlet pipe is connected to the drainage pipe 107 of the mixed bed 101, whose first outlet pipe is connected to the acid-base neutralization tank 106, and whose second outlet pipe is connected to the storage device; a total dissolved solids (TDS) analyzer 103, which is used to detect the content of total dissolved solids discharged from the drainage pipe 107 of the mixed bed 101 during the replacement stage; and a control system 104, which is connected to the TDS analyzer 103 and the three-way diversion valve 102 respectively, and controls the three-way diversion valve 102 to switch to the first outlet pipe or the second outlet pipe according to the comparison result of the detection value of the TDS analyzer 103 and the preset threshold.

[0027] This application provides a mixed-bed regeneration wastewater diversion and recovery device 100, which aims to improve water resource utilization, reduce wastewater treatment costs, and conform to the environmental protection concept of water conservation and emission reduction. Specifically, the mixed-bed regeneration wastewater diversion and recovery device 100 mainly includes three parts: a three-way diversion valve 102, a total dissolved solids (TDS) analyzer, and a control system 104. These parts cooperate with each other to achieve intelligent diversion and efficient recovery of the regeneration wastewater from the mixed bed 101. The following is a detailed description of each part.

[0028] The three-way diversion valve 102 is the core component of the device. Its inlet pipe is connected to the outlet pipe 107 of the mixed bed 101, responsible for diverting the wastewater generated during the displacement process of the mixed bed 101. The valve has two outlet pipes: the first outlet pipe is connected to the acid-base neutralization tank 106 for discharging high-salinity wastewater, and the second outlet pipe is connected to the storage device for recovering low-salinity, high-quality wastewater. The TDS analyzer 103 is installed on the inlet pipe of the three-way diversion valve to monitor the total dissolved solids content in the wastewater in real time. It has high measurement accuracy and can quickly and accurately detect the salinity level of the wastewater. During the displacement process of the mixed bed 101, the TDS analyzer 103 operates continuously, providing real-time water quality data support to the control system 104.

[0029] The control system 104 is connected to both the TDS analyzer 103 and the three-way diversion valve 102. Through preset control logic and algorithms, it achieves automated control of the three-way diversion valve 102. Specifically, the control system 104 receives the detection signal from the TDS analyzer 103 in real time and compares it with a preset threshold. When the detected value is higher than or equal to the threshold, the control system 104 controls the three-way diversion valve 102 to its initial state, i.e., the drainage flows to the first outlet pipe and enters the acid-base neutralization tank 106. When the detected value is lower than the threshold, the control system 104 immediately issues a command to drive the three-way diversion valve 102 to switch to the second outlet pipe, transporting the low-salinity drainage to the storage device.

[0030] The mixed-bed regeneration wastewater diversion and recovery device 100 in this application, under the control system 104, uses a three-way diversion valve 102 to precisely switch to the corresponding effluent pipeline based on the total dissolved solids in the wastewater, ensuring that the wastewater is properly treated and utilized. The entire control process is highly automated and has a fast response time, ensuring timely and accurate diversion of the wastewater from the mixed-bed 101. This significantly improves the operating efficiency of the demineralized water system and the water resource recovery rate, reducing the operating costs and wastewater treatment burden for enterprises, resulting in significant economic and environmental benefits.

[0031] In one specific implementation, when the TDS analyzer 103 detects a value greater than or equal to a preset threshold, the control system 104 activates the first outlet pipe; when the TDS analyzer 103 detects a value less than the preset threshold, the control system 104 activates the second outlet pipe. The preset threshold is 800 mg / L.

[0032] In this application, the preset threshold is 800 mg / L. When the TDS analyzer 103 detects that the total dissolved solids content in the wastewater is greater than or equal to 800 mg / L, the control system 104 automatically opens the first effluent pipeline, allowing the wastewater to flow into the acid-base neutralization tank 106, and then into the wastewater treatment system for centralized treatment. This process effectively avoids interference from high-salinity wastewater with the recovery system, ensuring the targeted and efficient nature of wastewater treatment. When the TDS analyzer 103 detects a value less than 800 mg / L, it indicates that the wastewater salinity is low and has value for recycling. At this time, the control system 104 will open the second effluent pipeline, transporting the low-salinity, high-quality wastewater to the raw water tank 105 for subsequent demineralized water preparation, thereby improving the water resource recycling rate and increasing the overall water production rate of the demineralized water system.

[0033] This device, through precise diversion control, not only reduces the burden on the wastewater treatment system and lowers the cost of wastewater treatment for enterprises, but also improves the efficiency of fresh water to desalinate water, bringing significant economic benefits to enterprises.

[0034] In one specific implementation, the drainage line 107 is used to transport the drainage generated by the mixed bed 101 during the displacement phase.

[0035] Those skilled in the art will understand that the water quality discharged from the mixed bed 101 varies at different stages. During the replacement stage, the total dissolved solids (TDS) value of the effluent gradually decreases until it meets discharge or recycling standards. The drainage pipeline 107 in this application refers to the pipeline used to transport the effluent generated by the mixed bed 101 during the replacement stage. This drainage pipeline 107 is flexibly designed; it can be used alone to transport effluent from the replacement stage or share the same pipeline with effluent from other stages. When sharing the same pipeline with effluent from other stages, the control system 104 automatically activates the TDS analyzer 103 to monitor the effluent in real time when it detects that the mixed bed 101 has entered the replacement stage. Based on the TDS analyzer 103's detection results, the control system 104 precisely adjusts the three-way diversion valve to switch the effluent's destination. This intelligent switching mechanism not only improves the efficiency of effluent treatment but also enhances the system's flexibility and adaptability, ensuring the economy and environmental friendliness of the entire demineralized water system.

[0036] In one specific implementation, the storage device is a raw water tank 105, which is used to recover wastewater with a total dissolved solids content that meets the standard and to supply water to the mixed bed 101.

[0037] The storage device in this application is a raw water tank 105, whose core function is to recover wastewater with a total dissolved solids content that meets the standard and supply it as raw water to the mixed bed 101. In other words, the raw water tank 105 in this application not only serves as a temporary storage container for the recovered water, but also plays an important role in providing regenerated water to the mixed bed 101, thereby realizing the recycling of water resources.

[0038] In some specific implementations, the TDS analyzer 103 is installed on the drain pipe 107 or on the inlet pipe of the three-way diversion valve 102.

[0039] In this application, the TDS analyzer 103 can be installed on the drainage pipe 107 or on the inlet pipe of the three-way diversion valve 102. Both installation methods enable real-time monitoring of the drainage during the displacement stage of the mixed bed 101, ensuring accurate detection of the total dissolved solids content in the drainage.

[0040] In some embodiments, this application also provides a mixed bed regeneration drainage system 200, which includes the aforementioned mixed bed regeneration drainage diversion and recovery device 100.

[0041] like Figure 2As shown, this application provides a mixed-bed regeneration drainage system 200, which includes a mixed-bed regeneration drainage diversion and recovery device 100, and a mixed bed 101, a drainage pipeline 107, an acid-base neutralization tank 106, and a raw water tank 105 connected thereto. Specifically, the mixed bed 101 is used for deep desalination of demineralized water. During the replacement stage, drainage is generated. The drainage pipeline 107 is responsible for transporting the water discharged from the mixed bed 101 to the diversion and recovery device. The acid-base neutralization tank 106 is used to receive high-salinity drainage and perform neutralization treatment. The raw water tank 105 is used to recover qualified drainage and supply it to the mixed bed 101 as raw water.

[0042] The above scheme introduces the mixed bed regeneration drainage system 200. The following details the steps of operating the mixed bed 101 drainage system.

[0043] During the backwash stratification stage, the backwash drain valve and backwash inlet valve of the mixed bed 101 must be opened. Simultaneously monitor the backwash drainage until the interface between the cation and anion resins in the mixed bed 101 is clear and the backwash drainage is clear, transparent, and free of impurities; at this point, the backwash stratification is complete. It is worth noting that the water used in this process is supplied by the secondary reverse osmosis permeate tank, and the backwash drainage is discharged to the ultrafiltration concentrate tank for recycling.

[0044] During the free settling stage, the vent valve of mixed bed 101 is opened to allow the resin to settle naturally. After free settling, water is drained by opening the main drain valve and vent valve of mixed bed 101. When the liquid level in the bed drops to 200-300mm above the resin layer, the bottom drain valve and vent valve are closed. It is worth noting that the water drained from mixed bed 101 in this step is also discharged into the ultrafiltration concentrate tank for recycling.

[0045] In the pre-spraying stage, the acid inlet, alkali inlet, and intermediate drain valve of the mixed bed 101 are opened. The inlet and outlet valves of the acid and alkali ejectors are activated. The regenerated water pump 202 is started to pressurize and transport the demineralized water from the demineralized water tank 203 to the acid and alkali ejectors. The intermediate drain valve is adjusted to maintain the liquid level in the mixed bed 101 at approximately 200 mm above the resin surface. The outlet valves 1 and 2 of the acid and alkali tanks and the inlet valve of the acid and alkali metering tank 205 are opened. The regenerated water used in this stage is demineralized water, and the regenerated wastewater is discharged to the ultrafiltration concentration tank 204 for recycling.

[0046] During the acid-base stage, open the 205 outlet door of the acid-base metering tank and manually adjust the acid and base concentrations to around 3.5%.

[0047] During the replacement phase, the process begins after 30 minutes of acid-base exchange. In this phase, the TDS analyzer 103 detects the total dissolved solids (TDS) content in the wastewater and transmits this information to the control system 104. The control system 104 compares the detected value with a preset threshold. If the detected value is greater than or equal to the preset threshold, it indicates a high TDS content in the wastewater. In this case, the control system 104 keeps the first outlet pipe open, allowing water to flow into the acid-base neutralization tank. If the detected value is less than the preset threshold, it indicates a low TDS content in the wastewater, meeting collection requirements. In this case, the control system 104 opens the second outlet pipe, allowing water to flow into the raw water tank 105 for storage.

[0048] It is worth noting that the replacement phase in this application can be set to 60 minutes. After the replacement time reaches 60 minutes, water is drained after the replacement is completed. At this time, the exhaust valve and the positive drain valve are opened to raise the liquid level to about 200mm above the resin surface. The positive drain valve and the exhaust valve are then closed, and the regenerated water is discharged into the neutralization tank for external discharge.

[0049] Next is the resin mixing stage. Open the backwash drain valve and air valve of mixing bed 101, and then open the air inlet valve of mixing bed 101 to allow the resin in mixing bed 101 to mix thoroughly for 3-5 minutes. After that, close the air inlet valve and backwash drain valve of mixing bed 101.

[0050] Finally, perform a forward wash. Open the inlet and vent valves of mixed bed 101. When the effluent is vented and water is discharged, open the forward wash drain and sampling valves, and close the vent valve. When the silica content in the effluent from mixed bed 101 is less than 20 μg / L and the conductivity is less than 0.2 μS / cm, it can be put into operation or set up for standby. It is worth noting that the forward wash water uses the permeate from the secondary reverse osmosis permeate tank, and the wastewater is discharged to the ultrafiltration concentrate tank for recycling.

[0051] The mixed-bed regeneration wastewater diversion and recycling device 100 and system proposed in this application focus on optimizing wastewater treatment during the replacement process of the mixed bed 101. It should be clarified that this solution primarily innovates the wastewater treatment method during the replacement stage, while the operational steps of other stages, such as backwashing stratification and free settling, fall within the scope of existing industry technology. To ensure the completeness of the solution description, this application provides a brief overview of these existing technical steps, but this is not a limitation on the solution itself. The core innovation of this solution lies in the introduction of key components such as a three-way diversion valve 102, a TDS analyzer 103, and a control system 104, tailored to the water quality changes in the wastewater during the replacement stage. This enables precise diversion and recycling of wastewater with different water qualities, thereby improving water resource utilization and reducing wastewater treatment costs.

[0052] While numerous embodiments of this application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will arise for those skilled in the art without departing from the spirit and intent of this application. It should be understood that various alternatives to the embodiments of this application described herein may be employed in the practice of this application. The appended claims are intended to define the scope of protection of this application and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A mixed-bed regeneration wastewater diversion and recycling device, characterized in that, include: The three-way diverter valve has its inlet pipe connected to the drainage pipe of the mixed bed, its first outlet pipe connected to the acid-base neutralization tank, and its second outlet pipe connected to the storage device. A total dissolved solids (TDS) analyzer is used to detect the total dissolved solids content discharged from the drainage pipe of the mixed bed during the displacement stage; and The control system is connected to the TDS analyzer and the three-way diversion valve respectively, and controls the three-way diversion valve to switch to the first outlet pipeline or the second outlet pipeline according to the comparison result of the detection value of the TDS analyzer and the preset threshold.

2. The apparatus according to claim 1, characterized in that, When the TDS analyzer detects a value greater than or equal to a preset threshold, the control system activates the first outlet pipe. When the TDS analyzer detects a value less than a preset threshold, the control system activates the second water outlet pipe.

3. The apparatus according to claim 1, characterized in that, The preset threshold is 800 mg / L.

4. The apparatus according to any one of claims 1-3, characterized in that, The drainage pipeline is used to transport the drainage generated by the mixed bed during the displacement phase.

5. The apparatus according to claim 4, characterized in that, The storage device is a raw water tank, used to recover wastewater with a total dissolved solids content that meets the standard, and to supply water to the mixed bed.

6. The apparatus according to claim 1, characterized in that, The TDS analyzer is installed on the drainage pipe or the inlet pipe of the three-way diversion valve.

7. A mixed-bed regeneration drainage system, characterized in that, It includes the mixed bed regeneration wastewater diversion and recycling device as described in any one of claims 1-6.

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