Resin water treatment system and method

Abstract

The invention discloses a resin water treatment system and method. The resin water treatment system comprises a resin tank, a water inlet and outlet assembly, a regeneration assembly and an air blowing assembly, the resin tank is provided with a liquid inlet, an inlet / outlet and a regeneration water outlet; the water inlet and outlet assembly comprises a raw water tank, a water inlet part and a water outlet part, the outlet end of the raw water tank is connected with the liquid inlet through the water inlet part, and the water outlet part is connected with the inlet and outlet; the regeneration assembly comprises a desorption liquid tank, a new acid tank, a desorption liquid pump, a new acid pump and a flow dividing pipe, the inlet end of the desorption liquid pump is connected with the desorption liquid tank, the outlet end of the desorption liquid pump is connected with the inlet and outlet, the inlet end of the new acid pump is connected with the new acid tank, the outlet end of the new acid pump is connected with the inlet and outlet, and the flow dividing pipe is provided with a raw water opening, a desorption liquid opening and a metal liquid opening. The inlet end of the shunt pipe is connected with the regeneration water outlet, the raw water port is communicated with the raw water tank, and the desorption liquid port is communicated with the desorption liquid tank; the air blowing assembly is connected with the liquid inlet and the regeneration water outlet. The problem of low metal concentration after desorption can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment equipment, in particular to a resin water treatment system and method. BACKGROUND

[0002] The positive electrode material of ternary lithium battery (NCM / NCA) contains high-value nickel, cobalt, manganese and lithium. Through recycling, these metals can re-enter the industry chain to manufacture new batteries, form a closed loop of "resources-products-scrap-regenerated resources", and reduce resource waste. The comprehensive utilization process of waste ternary lithium ion batteries includes battery pack pretreatment section, ternary battery powder leaching and impurity removal section, extraction section, ternary precursor synthesis section and other main sections. Among them, the raffinate produced in the extraction section will inevitably contain a small amount of target metals that have not been extracted (for example, when cobalt is extracted, nickel and manganese may remain in the raffinate). After reverse extraction, the loaded organic phase or reverse extraction liquid also needs to be washed and balanced, resulting in metal-containing washing water. In addition, in the ternary precursor synthesis section, a large amount of metal-containing washing wastewater will be produced, and the water volume is huge.

[0003] The existing mainstream process is to recover valuable metals through "resin + membrane treatment" process, and the membrane effluent is reused. However, the resin often has problems such as large amount of elution water and low metal concentration of the metal solution after elution in the process of adsorption and elution concentration of metal solution, resulting in high subsequent treatment cost and huge investment cost. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a resin water treatment system and method to solve the problem of low metal solution concentration after elution.

[0005] The solution to the technical problem of the present application is: In a first aspect, a resin water treatment system is provided, comprising: A resin tank is provided with a liquid inlet, an inlet and outlet, and a regeneration outlet. The liquid inlet is located at the top of the resin tank, and the inlet and outlet are located at the bottom of the resin tank. The resin tank is used to place resin, and the regeneration outlet is located on the upper side of the resin. A water inlet and outlet assembly includes a raw water tank, a water inlet component, and a water outlet component. The outlet end of the raw water tank is connected to the liquid inlet through the water inlet component, and the water outlet component is connected to the inlet and outlet. The regeneration assembly includes an eluent tank, a new acid tank, an eluent pump, a new acid pump, and a distribution pipe. The inlet end of the eluent pump is connected to the eluent tank, and the outlet end of the eluent pump is connected to the inlet and outlet. The inlet end of the new acid pump is connected to the new acid tank, and the outlet end of the new acid pump is connected to the inlet and outlet. The distribution pipe has a raw water outlet, an eluent outlet, and a metal liquid outlet. The inlet end of the distribution pipe is connected to the regeneration outlet. The raw water outlet is connected to the raw water tank, the eluent outlet is connected to the eluent tank, and the metal liquid outlet is used to discharge metal liquid. An air blowing assembly is connected to the liquid inlet and the regeneration outlet respectively to provide compressed air to the resin tank.

[0006] The present invention has at least the following beneficial effects: Due to the inclusion of an aeration assembly, the resin tank can be emptied by aeration after both adsorption and desorption are completed, thereby rapidly draining any residual raw water or desorbed liquid from the resin tank, significantly improving processing efficiency. Furthermore, emptying the resin tank by aeration after adsorption reduces the dilution of the desorbed liquid by the raw water, improving the desorption effect and increasing the metal concentration of the desorbed metal liquid, thus reducing subsequent processing costs and lowering overall costs. Additionally, emptying the resin tank by aeration after desorption significantly reduces the amount of water used for subsequent washing of the resin tank, further reducing costs.

[0007] Moreover, because of the presence of an eluent tank, after the new acid enters the resin tank for eluent analysis, the new acid with a low metal concentration can be diverted through a splitter and returned to the eluent tank for use in the next cycle of analysis. In the next cycle of analysis, the eluent formed in the previous cycle is used to analyze the resin to obtain a metal liquid. The obtained metal liquid has a high metal concentration, which reduces the cost of subsequent processing and improves the utilization rate of the new acid.

[0008] As a further improvement to the above technical solution, the resin water treatment system further includes: The intermediate drainage device includes a main water collection pipe and multiple water distribution pipes. The main water collection pipe is installed inside the resin tank and located on the upper side of the resin. The outlet end of the main water collection pipe is connected to the regeneration outlet. Each water distribution pipe is connected to the main water collection pipe and is provided with a water inlet.

[0009] The central drainage device allows the liquid that forms the water column and pushes out the resin to flow through the water distribution pipe to the main water collection pipe, and then flows back through the main water collection pipe and is discharged from the regeneration outlet to the branch pipe.

[0010] As a further improvement to the above technical solution, the regeneration assembly further includes an acid-base detection component, a first control valve, a second control valve, and a third control valve. The diversion pipe includes a main pipe, a raw water pipe, an eluent pipe, and a metal liquid pipe. The raw water pipe, the eluent pipe, and the metal liquid pipe are respectively connected to the main pipe. The raw water inlet is located at the outlet end of the raw water pipe, the eluent inlet is located at the outlet end of the eluent pipe, and the metal liquid inlet is located at the outlet end of the metal liquid pipe. The acid-base detection component is located at the inlet end of the main pipe. The first control valve is located in the raw water pipe, the second control valve is located in the eluent pipe, and the third control valve is located in the metal liquid pipe. The acid-base detection component is used to detect the real-time acidity and alkalinity at the inlet end of the main pipe.

[0011] The liquid entering the main pipeline is detected by an acid-base detection component. The liquid is classified according to its acidity or alkalinity, and the liquid is diverted. This method is more accurate and can prevent raw water from entering the metal liquid outlet and diluting the metal liquid.

[0012] As a further improvement to the above technical solution, the resin water treatment system further includes: A water washing assembly includes a water washing pipe and a water washing valve, wherein the water washing valve is disposed on the water washing pipe and the outlet end of the water washing pipe is connected to the inlet and outlet.

[0013] The water washing unit can clean the resin tank after analysis, avoiding the influence of residual acid in the resin tank on the adsorption of metals by the resin in the cycle, thereby improving the metal recovery rate.

[0014] As a further improvement to the above technical solution, the resin water treatment system further includes: The liquid return assembly includes a ground tank, a liquid return pump, a drain pipe, and a drain valve. The inlet end of the drain pipe is connected to the inlet and outlet. The drain valve is located on the drain pipe. The outlet end of the drain pipe is connected to the ground tank. The inlet end of the liquid return pump is connected to the ground tank. The outlet end of the liquid return pump is connected to the raw water tank and the analytical liquid tank, respectively.

[0015] The liquid return assembly allows the liquid discharged from the resin tank by air blowing to be collected separately and reused, reducing the dilution of the eluent by the raw water.

[0016] As a further improvement to the above technical solution, the air blowing assembly includes a compressed air pipe, a first air inlet valve, a second air inlet valve, a first air inlet pipe, and a second air inlet pipe; one end of the first air inlet pipe is connected to the outlet end of the compressed air pipe, and the other end is connected to the liquid inlet, and the first air inlet valve is disposed on the first air inlet pipe; one end of the second air inlet pipe is connected to the outlet end of the compressed air pipe, and the other end is connected to the regenerated water outlet, and the second air inlet valve is disposed on the second air inlet pipe.

[0017] After adsorption and desorption are completed, the resin tank can be emptied by blowing air through the air blowing assembly. Compressed air can enter the resin tank from the first air inlet pipe and the second air inlet pipe, so that the gas can enter the resin tank from top to bottom, blowing out the resin adsorbed in the resin tank and the water or residual acid in the resin gaps.

[0018] As a further improvement to the above technical solution, the resin tank is also provided with an exhaust port, which is located at the top of the resin tank. The resin water treatment system also includes an exhaust valve and an exhaust pipe, with the exhaust valve located on the exhaust pipe and the exhaust port connected to the exhaust pipe.

[0019] When the resin water treatment system is initially filled with water or restarted, the air in and above the resin tank can be released by opening the vent valve. During the process of raw water entering the resin tank for adsorption, opening the vent valve allows the inside of the resin tank to be connected to the atmosphere, making the process of raw water entering and leaving the resin tank smoother.

[0020] Secondly, a resin water treatment method is proposed, characterized in that it is applied to a resin water treatment system as described in any one of the technical solutions in the first aspect, the resin water treatment method comprising the following steps: Step 1, Resin Adsorption: Control the raw water to enter the resin tank from the raw water tank, and after the raw water has been adsorbed by the resin, it is discharged through the inlet and outlet; Step 2, single air blowing and purging: control the air blowing assembly to supply compressed air to the resin tank so that the raw water remaining in the resin tank is discharged from the inlet and outlet; Step 3, Part 1: Controlling the elution liquid in the elution liquid tank to enter the resin tank through the inlet and outlet; Step 4, Second-stage analysis: Control the new acid in the new acid tank to enter the resin tank through the inlet and outlet; Step 5, Secondary air blowing and evacuation: Control the air blowing assembly to supply compressed air to the resin tank so that the desorbed liquid in the resin tank is discharged from the inlet and outlet.

[0021] The above steps improve acid utilization, increase the metal concentration in the molten metal discharged from the molten metal outlet, and reduce subsequent investment and operating costs for molten metal recycling. Furthermore, during the first purging, some of the raw water in the resin tank is blown out, reducing dilution of the subsequent eluent, ensuring effective eluent extraction, and increasing metal concentration. During the second purging, some residual acid in the resin tank is blown out, reducing the amount of washing water used for subsequent resin tank cleaning.

[0022] As a further improvement to the above technical solution, the resin water treatment method further includes the following steps: Step 6, water washing: Water is injected into the resin tank through the inlet and outlet until the water level submerges the resin. After the resin has been soaked for a preset time, the air blowing component is controlled to provide compressed air to the resin tank so that the liquid in the resin tank is discharged from the inlet and outlet.

[0023] By cleaning the resin tank through the above steps, the residual acid in the resin tank can be prevented from affecting the adsorption of metal by the resin in the next cycle.

[0024] As a further improvement to the above technical solution, after performing step five, water is first injected into the resin tank through the inlet and outlet, so that the residual desorption liquid in the resin tank is discharged into the raw water tank through the regeneration outlet, and then step six is ​​performed.

[0025] By following the steps above, the residual eluent can be pushed out into the raw water tank first, reducing the residual acid in the resin tank and thus reducing the amount of washing water.

[0026] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of the present invention, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the resin water treatment system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the resin tank according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the middle discharge device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the supporting structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the use of the inlet and outlet water components according to an embodiment of the present invention; Figure 6 This is a schematic diagram illustrating the use of the regeneration component according to an embodiment of the present invention; Figure 7 This is a schematic diagram illustrating the use of the air blowing assembly according to an embodiment of the present invention; Figure 8 This is a schematic diagram illustrating the use of the liquid return component according to an embodiment of the present invention; Figure 9 This is a flowchart of a resin treatment method according to an embodiment of the present invention.

[0029] Figure label: 100. Resin tank; 110. Resin; 120. Central drainage device; 121. Main water collection pipe; 122. Water distribution pipe; 123. End fixing bracket; 124. Branch pipe fixing bracket; 130. Support structure; 131. Support frame; 132. Support plate; 133. Water cap; 140. Liquid inlet; 150. Inlet and outlet; 160. Regeneration outlet; 170. Manhole; 180. Vent; 190. Interception cylinder; 200. Inlet / outlet water assembly; 210. Raw water tank; 211. First level gauge; 220. Inlet water component; 221. Inlet water pipe; 222. Inlet water valve; 223. Inlet water pump; 224. First liquid flow meter; 225. First gas shut-off valve; 230. Outlet water component; 231. Outlet water pipe; 232. Outlet water valve; 300. Regeneration component; 310. Desorbent tank; 311. Second level gauge; 320. New acid tank; 321. Third level gauge; 322. New acid pipe; 323. Seventh control valve; 330. Desorbent pump; 331. Fourth control valve; 340. New acid pump; 341. Fifth control valve; 350. Diverter pipe; 351. Raw water pipe; 352. Desorbent branch pipe; 353. Metal liquid branch pipe; 354. First control valve; 355. Second control valve; 356. Third control valve; 357. Third liquid flow meter; 358. Main pipeline; 3581. Second gas shut-off valve; 3582. Acid-base detection component; 360. Main inlet pipe; 361. Second liquid flow meter; 362. Sixth control valve; 400, Air blowing assembly; 410, Compressed air pipe; 420, First air inlet pipe; 421, First air inlet valve; 430, Second air inlet pipe; 431, Second air inlet valve; 440, Gas flow meter; 500. Exhaust assembly; 510. Exhaust valve; 520. Exhaust pipe; 600, return liquid assembly; 610, base tank; 620, return liquid pump; 630, drain pipe; 631, drain valve; 640, return liquid pipe; 641, first return liquid valve; 642, second return liquid valve; 700. Washing assembly; 710. Washing pipe; 720. Washing valve. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this invention, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0032] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0034] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. The various technical features of the present invention can be combined interactively without contradicting each other.

[0035] Reference Figures 1 to 8 In a first aspect, embodiments of the present invention propose a resin water treatment system, which includes a resin tank 100, an inlet / outlet water assembly 200, a regeneration assembly 300, and an air blowing assembly 400. This system can achieve the adsorption and desorption of metals to recover precious metals, and can solve the problems of large desorption water volume and low desorption concentration in the prior art.

[0036] In this embodiment, refer to Figure 2The resin tank 100 is provided with an inlet 140, an inlet / outlet 150, and a regenerated water outlet 160. The inlet 140 is located at the top of the resin tank 100, the inlet / outlet 150 is located at the bottom of the resin tank 100, resin 110 is placed inside the resin tank 100, and the regenerated water outlet 160 is located on the side wall of the resin tank 100 and above the resin 110. The water inlet / outlet assembly 200 includes a raw water tank 210, a water inlet component 220, and a water outlet component 230. The outlet end of the raw water tank 210 is connected to the inlet 140 of the resin tank 100 through the water inlet component 220, allowing raw water in the raw water tank 210 to be supplied into the resin tank 100. The water outlet component 230 is connected to the inlet / outlet 150 of the resin tank 100, allowing the raw water in the raw water tank 210 that has been treated by the resin 110 to be discharged.

[0037] Reference Figure 6 The regeneration assembly 300 includes a desorption tank 310, a desorption pump 330, a new acid tank 320, a new acid pump 340, and a diversion pipe 350. The outlet end of the desorption tank 310 is connected to the inlet end of the desorption pump 330, and the inlet end of the new acid pump 340 is connected to the outlet end of the new acid tank 320. The outlet ends of the desorption pump 330 and the new acid pump 340 are respectively connected to the inlet and outlet 150. The diversion pipe 350 is provided with a raw water outlet, a desorption outlet, and a metal liquid outlet. The inlet end of the diversion pipe 350 is connected to the regeneration outlet 160. The raw water outlet is connected to the raw water tank 210, the desorption outlet is connected to the desorption tank 310, and the metal liquid outlet is used to discharge metal liquid with a concentration that meets the standard.

[0038] Reference Figure 7 The air blowing assembly 400 is connected to the liquid inlet 140 and the regeneration outlet 160 respectively, and the air blowing assembly 400 can provide compressed air to the resin tank 100.

[0039] When using the resin water treatment system of this embodiment to treat washing wastewater containing metal, the washing wastewater is first adsorbed by the resin 110 in the resin tank 100. When the metal concentration of the wastewater discharged through the effluent component 230 exceeds the standard concentration, the resin 110 needs to be regenerated using a desorption acid. After adsorption, compressed air is supplied to the resin tank 100 through the air blowing assembly 400, which allows the residual washing wastewater in the resin tank 100 to be blown out, reducing the dilution of the subsequent desorption liquid, thus ensuring the desorption effect and increasing the concentration of the subsequently obtained metal liquid. After desorption, the compressed air is supplied to the resin tank 100 through the air blowing assembly 400, which allows the residual acid in the desorption liquid in the resin tank 100 to be discharged, reducing the amount of washing water required for subsequent cleaning of the resin tank 100.

[0040] In this embodiment, after the resin 110 completes adsorption, the eluent pump 330 is turned on, and the eluent enters from the bottom of the resin tank 100 and undergoes a period of eluent flow. The eluent forms a laminar upward flow within the resin tank 100, pushing out the raw water adsorbed by the resin 110 and the interstitial water in the gaps, allowing the raw water to first exit the resin tank 100 through the regeneration outlet 160, so that it can be separated by the diversion pipe 350. This avoids diluting the metal liquid with residual raw water and increases the concentration of the metal liquid. After the eluent enters the resin tank 100, it can precipitate the metal adsorbed by the resin 110. The eluent with a high metal concentration can be discharged from the resin tank 100 through the regeneration outlet 160 and discharged from the metal liquid outlet under the action of the diversion pipe 350.

[0041] After the eluent completes its eluent analysis, the new acid pump 340 is turned on, and new acid enters the resin tank 100 from the bottom for a second-stage eluent analysis. The new acid forms a laminar upward flow within the resin tank 100, causing any residual molten metal in the gaps of the resin 110 to first exit the resin tank 100 through the regeneration outlet 160 for separation via the diverter pipe 350. Subsequently, the new acid exits the resin tank 100 from the regeneration outlet 160 and is discharged from the eluent outlet under the action of the diverter pipe 350. It is understood that the new acid entering the resin tank 100 from the new acid tank 320 has a low metal concentration after eluent analysis and is not immediately recycled; it can be used as acid for the next stage of eluent analysis. This setup significantly improves acid utilization, increases the metal concentration of the eluent recovered from the molten metal outlet, and reduces subsequent investment and operating costs for reuse.

[0042] Understandably, after the second stage of analysis is completed, the resin tank 100 can be purged by the air blowing assembly 400 to blow out the residual analysis liquid in the resin tank 100 and reduce the amount of subsequent water washing.

[0043] In some embodiments, the resin water treatment system further includes a central discharge device 120, as shown in the reference. Figure 3 The intermediate drainage device 120 includes a water collection main pipe 121 and a water distribution pipe 122. The water collection main pipe 121 is installed inside the resin tank 100 and located on the upper side of the upper surface of the resin 110. The outlet end of the water collection main pipe 121 is connected to the regeneration outlet 160. Multiple water distribution pipes 122 are provided, and each of the multiple water distribution pipes 122 is connected to the water collection main pipe 121. Water inlet holes are provided on the water distribution pipes 122.

[0044] The liquid that forms the water column can enter the water distribution pipe 122 through the water inlet, flow along the water distribution pipe 122 to the water collection pipe 121, and be discharged through the water collection pipe 121 and the regeneration outlet 160.

[0045] In some embodiments, the main water collection pipe 121 is arranged horizontally in the left-right direction, and the water distribution pipes 122 are evenly arranged on the front and rear sides of the main water collection pipe 121 and are arranged horizontally in the front-back direction.

[0046] In some embodiments, each water distribution pipe 122 has water inlet holes evenly arranged around its perimeter, and a mesh sleeve is fitted over the outside of the water distribution pipe 122. It is understood that the mesh sleeve can intercept the resin 110. In some embodiments, the aperture of the water inlet holes is greater than or equal to 5 mm and less than or equal to 10 mm, ensuring smooth liquid entry while further preventing the resin 110 from entering. In some embodiments, the mesh sleeve is made of polyester material with a mesh size of 60 mesh.

[0047] In some embodiments, the water distribution pipe 122 and the water collection main pipe 121 are detachably connected, for example by a threaded connection, to facilitate subsequent cleaning of the interior of the water distribution pipe 122 and the water collection main pipe 121.

[0048] In some embodiments, the intermediate drainage device 120 further includes an end fixing bracket 123 and a branch pipe fixing bracket 124. The end fixing bracket 123 is disposed on the inner wall of the resin tank 100 and located on the opposite side of the regeneration outlet 160. The end fixing bracket 123 can be installed inside the resin tank 100 by welding, screw connection, or other methods. One end of the main water collection pipe 121 is connected to the regeneration outlet 160 via a flange, and the other end is fixed to the end fixing bracket 123 via a U-shaped clamp, thereby facilitating the disassembly of the main water collection pipe 121 for cleaning. The branch pipe fixing bracket 124 is bolted to the inside of the resin tank 100, and the water distribution pipe 122 is fixed to the branch pipe fixing bracket 124 via a U-shaped clamp, thereby facilitating the disassembly of the water distribution pipe 122 for cleaning.

[0049] In some embodiments, refer to Figure 6 The regeneration component 300 also includes an acid-base detection component 3582, a first control valve 354, a second control valve 355, and a third control valve 356. The diversion pipe 350 includes a main pipe 358, a raw water pipe 351, an eluent pipe 352, and a metal liquid pipe 353. The inlet ends of the raw water pipe 351, the eluent pipe 352, and the metal liquid pipe 353 are respectively connected to the main pipe 358. The outlet end of the raw water pipe 351 extends into the raw water tank 210, and the raw water outlet is located at the outlet end of the raw water pipe 351. The outlet end of the eluent pipe 352 extends into the eluent tank 310, and the eluent outlet is located at the outlet end of the eluent pipe 352. The metal liquid outlet is located at the outlet end of the metal liquid pipe 353.

[0050] Acid-base detection component 3582 is installed at the inlet end of the main pipeline 358. A first control valve 354 is installed on the raw water pipe 351, a second control valve 355 is installed on the eluent pipe 352, and a third control valve 356 is installed on the molten metal pipe 353. The acid-base detection component 3582 is used to detect the real-time acid-base level at the inlet end of the main pipeline 358. Operators can control the opening or closing of the first control valve 354, the second control valve 355, and the third control valve 356 based on the real-time acid-base level.

[0051] In some embodiments, the regeneration assembly 300 further includes a controller, and the acid-base detection component 3582, the first control valve 354, the second control valve 355, and the third control valve 356 are electrically connected to the controller, respectively. The controller is configured to control the opening or closing of the first control valve 354, the second control valve 355, and the third control valve 356 according to the real-time acid-base level.

[0052] The acid-base detection component 3582 can automatically distinguish whether the liquid entering the main pipe 358 is raw water or analyte, and open the corresponding control valve to allow the raw water entering the main pipe 358 to flow back to the raw water tank 210, thereby preventing the raw water from diluting the metal liquid and allowing more of the metal liquid to flow out and be recycled through the metal liquid branch pipe 353.

[0053] In some embodiments, the acid-base detection component 3582 is a pH meter. By utilizing the differences in pH values ​​of the raw water, the low-concentration eluent, and the high-concentration eluent, it automatically controls the opening or closing of the first control valve 354, the second control valve 355, and the third control valve 356 to achieve automatic diversion and further avoid mutual interference between different liquids.

[0054] In some embodiments, a third liquid flow meter 357 is provided on the metal liquid distribution pipe 353. The third liquid flow meter 357 is used to obtain the liquid flow rate in the metal distribution pipe and cooperate with the manual closing and opening of the third control valve 356 to control the volume of high metal concentration leaching liquid in each reuse workshop, so as to avoid subsequent reuse of low concentration leaching liquid in the workshop and reduce the metal liquid concentration.

[0055] In some embodiments, refer to Figure 1 The resin water treatment system also includes a water washing component 700, which can wash the resin tank 100 and other structures after the resin 110 has been analyzed. The water washing component 700 includes a water washing pipe 710 and a water washing valve 720. The water washing pipe 710 is connected to an external water source, and the water washing valve 720 is mounted on the water washing pipe 710. The outlet end of the water washing pipe 710 is connected to the inlet and outlet 150 of the resin tank 100. When water washing is required, the water washing valve 720 is opened, allowing water to be supplied to the resin tank 100 through the water washing pipe 710 to initiate the water washing process.

[0056] In some embodiments, refer toFigure 1 and Figure 8 The resin water treatment system also includes a return liquid assembly 600. The return liquid assembly 600 includes a ground tank 610, a return liquid pump 620, an empty pipe 630, and an empty valve 631. The inlet end of the empty pipe 630 is connected to the inlet and outlet 150 of the resin tank 100. The empty valve 631 is installed on the empty pipe 630. The outlet end of the empty pipe 630 is connected to the ground tank 610. The inlet end of the return liquid pump 620 is connected to the ground tank 610. The outlet end of the return liquid pump 620 is connected to the raw water tank 210 and the eluent tank 310, respectively.

[0057] The base tank 610 is designed to receive raw water, eluent, or wash water blown out from the inlet and outlet 150 of the resin tank 100. The liquid remaining in the resin tank 100 is blown out from the inlet and outlet 150 by the air blowing assembly 400 and drips into the base tank 610 along the drain pipe 630. Subsequently, through the action of the return pump 620, the liquid flows back to the raw water tank 210 or the eluent tank 310 for continued use.

[0058] In some embodiments, the return liquid assembly 600 further includes a first return liquid valve 641, a second return liquid valve 642, and a return liquid pipe 640. The outlet end of the return liquid pipe 640 is provided with two return liquid branch pipes, which extend into the raw water tank 210 and the eluent tank 310, respectively. The inlet end of the return liquid pipe 640 is connected to the outlet end of the return liquid pump 620. The first return liquid valve 641 is located on the return liquid branch pipe extending into the raw water tank 210, and the second return liquid valve 642 is located on the return liquid branch pipe extending into the eluent tank 310. In use, the first return liquid valve 641 or the second return liquid valve 642 can be opened according to the specific liquid in the tank 610, so that raw water enters the raw water tank 210 and the eluent enters the eluent tank 310.

[0059] The vent valve 631, the first return valve 641, and the second return valve 642 can be battery valves.

[0060] In some embodiments, the basin 610 is provided with a sump, into which a pipe connecting the inlet of the return pump 620 to the basin 610 is inserted to achieve maximum drainage of liquid and prevent different liquids from affecting each other. In some embodiments, the bottom of the basin 610 is inclined downwards towards the sump, allowing liquid to concentrate in the sump and be pumped out by the return pump 620. In some embodiments, the depth of the sump is greater than or equal to 5 cm and less than or equal to 10 cm.

[0061] In some embodiments, refer to Figure 1 and Figure 7The air blowing assembly 400 includes a compressed air pipe 410, a first air inlet valve 421, a second air inlet valve 431, a first air inlet pipe 420, and a second air inlet pipe 430. One end of the first air inlet pipe 420 is connected to the outlet end of the compressed air pipe 410, and the other end is connected to the liquid inlet 140. The first air inlet valve 421 is disposed on the first air inlet pipe 420. One end of the second air inlet pipe 430 is connected to the outlet end of the compressed air pipe 410, and the other end is connected to the regeneration water outlet 160. The second air inlet valve 431 is disposed on the second air inlet pipe 430.

[0062] When air blowing is required, the first air inlet valve 421 and the second air inlet valve 431 are opened respectively, and compressed air can enter the resin tank 100 from the liquid inlet 140 and the regeneration outlet 160. This can accelerate the emptying of the liquid in the resin tank 100, reduce the emptying time, and also backflush the intermediate discharge device 120 to prevent resin 110 from adhering to the intermediate discharge device 120 and to prevent resin 110 from clogging the mesh sleeve and other structures.

[0063] In some embodiments, the air blowing assembly 400 further includes a gas flow meter 440, which is disposed on the compressed air pipe 410 and used to detect the gas flow rate within the compressed air pipe 410. By providing the gas flow meter 440, the opening degrees of the first inlet valve 421 and the second inlet valve 431 can be controlled according to the flow rate displayed by the gas flow meter 440, ensuring that the compressed air flow rate meets the gas velocity requirements of the cross-sectional area of ​​the resin tank 100, so that the compressed air can accelerate the emptying of residual liquid within the resin tank 100.

[0064] In some embodiments, refer to Figure 1 and Figure 2 The resin tank 100 is also equipped with an exhaust port 180, which is located at the top of the resin tank 100. The resin water treatment system also includes an exhaust assembly 500, which includes an exhaust valve 510 and an exhaust pipe 520. The exhaust valve 510 is mounted on the exhaust pipe 520, and the exhaust port 180 is connected to the exhaust pipe 520. During the initial filling or restart of the resin water treatment system, the air inside the resin tank 100 and above the resin 110 can be released by opening the exhaust valve 510.

[0065] In some embodiments, the resin tank 100 is also provided with a manhole 170. The upper and lower parts of the resin tank 100 are respectively provided with manholes 170, which can facilitate maintenance personnel to inspect or replace the resin 110.

[0066] In some embodiments, an intercepting cylinder 190 is provided inside the resin tank 100. The intercepting cylinder 190 is located below the liquid inlet 140 and can intercept the resin 110, preventing the resin 110 from entering the water inlet pipe 221 through the liquid inlet 140. Since the first air inlet valve 421 of the air blowing assembly 400 is connected to the liquid inlet 140 and can blow air into the resin tank 100 through the liquid inlet 140, it can also backflush the intercepting cylinder 190 during air blowing, preventing the resin 110 from adhering to the intercepting cylinder 190, ensuring that the intercepting cylinder 190 is not blocked by the resin 110 and can be used normally.

[0067] In some embodiments, refer to Figure 2 and Figure 4 The resin tank 100 is provided with a support structure 130 for supporting the resin 110, so that a gap is formed between the bottom surface of the resin 110 and the bottom surface of the resin tank 100, thereby preventing the resin 110 from clogging the inlet and outlet 150 and facilitating the flow of liquid. In some embodiments, the support structure 130 includes a support frame 131, a support plate 132, and a water cap 133. The support plate 132 is used to hold the resin 110. The upper end of the support frame 131 is connected to the lower surface of the support plate 132, and the lower end of the support frame 131 is connected to the inner bottom surface of the resin tank 100, so that there is a gap between the support frame 131 and the inner bottom surface of the resin tank 100. Multiple through holes are provided on the support plate 132, and multiple water caps 133 are correspondingly provided. The water caps 133 are respectively inserted into the various through holes on the support plate 132, which can ensure the smooth passage of liquid while preventing the resin 110 from passing through.

[0068] When in use, the top surface of the resin 110 is lower than the middle discharge device 120. The distance between the top surface of the resin 110 and the lower surface of the middle discharge device 120 is greater than or equal to 5 cm and less than or equal to 10 cm, so as to avoid the resin 110 clogging the middle discharge device 120 and to make the most of the space inside the resin tank 100.

[0069] In some embodiments, refer to Figure 1 and Figure 5The water inlet component 220 includes an inlet pipe 221, an inlet valve 222, and an inlet pump 223. The inlet end of the inlet pump 223 is connected to the outlet end of the raw water tank 210, and the outlet end of the inlet pump 223 is connected to the inlet end of the inlet pipe 221. The inlet valve 222 is installed on the inlet pipe 221, and the outlet end of the inlet pipe 221 is connected to the liquid inlet 140 of the resin tank 100. When the inlet valve 222 and the inlet pump 223 are open, the raw water in the raw water tank 210 can enter the resin tank 100 along the inlet pipe 221. The water outlet component 230 includes a water outlet pipe 231 and a water outlet valve 232. The water outlet valve 232 is installed on the water outlet pipe 231. The inlet end of the water outlet pipe 231 is connected to the inlet and outlet 150 of the resin tank 100. When the water outlet valve 232 is opened, the raw water in the resin tank 100 that has been treated by the resin 110 can be discharged from the resin water treatment system through the water outlet pipe 231.

[0070] In some embodiments, the water inlet component 220 further includes a first liquid flow meter 224, which is installed at the water inlet pipe 221 and can monitor the liquid flow rate of the water inlet pipe 221. The first liquid flow meter 224 is linked with the water inlet valve 222 to stabilize the water inlet flow rate within a certain range. When the first liquid flow meter 224 detects that the liquid flow rate in the water inlet pipe 221 is greater than the upper limit of the preset flow rate range, the opening of the water inlet valve 222 decreases; when the first liquid flow meter 224 detects that the liquid flow rate in the water inlet pipe 221 is less than the lower limit of the preset flow rate range, the opening of the water inlet valve 222 increases. This configuration ensures that the raw water stays in the resin tank 100 for a sufficient time to further ensure complete adsorption by the resin 110.

[0071] In some embodiments, the outlet end of the raw water tank 210 is located at the bottom of the raw water tank 210. The inlet and outlet water assembly 200 also includes a first level gauge 211, which is disposed at the upper part of the raw water tank 210. The first level gauge 211 is linked with the inlet pump 223 to control the liquid level in the raw water tank 210 within a certain range, thereby preventing the raw water tank 210 from overflowing and the inlet pump 223 from running dry.

[0072] In some embodiments, the outlet end of the first air inlet pipe 420 is connected to the water inlet pipe 221, and the outlet end of the water inlet pipe 221 is connected to the liquid inlet 140. The outlet end of the second air inlet pipe 430 is connected to the main pipe 358 of the diversion pipe 350, and the inlet end of the main pipe 358 is connected to the regeneration outlet 160.

[0073] In some embodiments, a first gas shut-off valve 225 is provided on the water inlet pipe 221. The first gas shut-off valve 225 is located between the outlet end of the first air inlet pipe 420 and the water inlet pump 223, which can prevent compressed air from flowing to the side of the water inlet pump 223, thereby preventing damage to the water inlet pump 223. A second gas shut-off valve 3581 is provided on the main pipe 358. The second gas shut-off valve 3581 is located on the side away from the resin tank 100 at the connection between the main pipe 358 and the second air inlet pipe 430, and is located between the second air inlet pipe 430 and the branch pipe closest to the resin tank 100, which can prevent compressed air from flowing to each branch pipe and ensure the blowing effect of compressed air on the resin tank 100.

[0074] In some embodiments, the water outlet component 230 includes a water outlet pipe 231 and a water outlet valve 232. The inlet end of the water outlet pipe 231 is connected to the inlet and outlet 150 of the resin tank 100. After the raw water enters the resin tank 100 through the water inlet component 220, the metal in the raw water is adsorbed by the resin 110. The wastewater after adsorption is completed is discharged through the water outlet pipe 231.

[0075] In some embodiments, the inlet end of the outlet pipe 231 is connected to the drain pipe 630, and the inlet end of the drain pipe 630 is connected to the inlet and outlet 150. In some embodiments, the outlet end of the washing pipe 710 of the washing assembly 700 is also connected to the drain pipe 630, and the drain pipe 630 is connected to the inlet and outlet 150.

[0076] In some embodiments, refer to Figure 1 and Figure 6 The outlet end of the analytical liquid tank 310 is located at the bottom of the analytical liquid tank 310. A second level gauge 311 is installed at the upper end of the analytical liquid tank 310. The analytical liquid pump 330 is interlocked with the second level gauge 311 to control the liquid level of the analytical liquid tank 310 within a certain range, so as to avoid overflow or the analytical liquid pump 330 running dry.

[0077] In some embodiments, refer to Figure 1 and Figure 6 The outlet of the new acid tank 320 is located at the bottom of the new acid tank 320, and a third level gauge 321 is installed at the top of the new acid tank 320. The new acid pump 340 is interlocked with the third level gauge 321 to control the liquid level of the new acid tank 320 within a certain range, avoiding the new acid pump 340 from running dry. When the liquid level is too low, the new acid pump 340 is shut off.

[0078] In some embodiments, the inlet end of the new acid tank 320 is connected to a new acid pipe 322, which provides new acid to the new acid tank 320. In some embodiments, the new acid is sulfuric acid. A seventh control valve 323 is provided on the new acid pipe 322, which is interlocked with a third level gauge 321 to control the liquid level in the new acid tank 320 within a certain range, preventing the new acid tank 320 from overflowing or the new acid pump 340 from running dry. When the liquid level in the new acid tank 320 is too low, the seventh control valve 323 opens, and new acid enters the new acid tank 320; when the liquid level in the new acid tank 320 is too high, the seventh control valve 323 closes.

[0079] In some embodiments, the eluent tank 310 and the new acid tank 320 share a single inlet main pipe 360. The outlet end of the inlet main pipe 360 ​​is connected to the drain pipe 630, thus connecting to the inlet / outlet 150. The inlet end of the inlet main pipe 360 ​​is connected to two inlet branch pipes via a tee fitting. The two inlet branch pipes are respectively connected to the outlet end of the eluent pump 330 and the outlet end of the new acid pump 340. A fourth control valve 331 and a fifth control valve 341 are respectively installed on the two inlet branch pipes, which can regulate the flow rate of the eluent or new acid after the pump and prevent the eluent from the eluent tank 310 from directly entering the new acid tank 320, and prevent the new acid in the new acid tank 320 from directly entering the eluent tank 310 from the bottom.

[0080] In some embodiments, the fourth control valve 331 and the fifth control valve 341 are solenoid valves.

[0081] In some embodiments, the inlet pipe 360 ​​is provided with a second liquid flow meter 361 and a sixth control valve 362. The sixth control valve 362 can control the opening size according to the flow rate obtained by the second liquid flow meter 361, thereby adjusting the flow rate of the desorption acid into the resin tank 100 to ensure the desorption effect and control the desorption acid to gradually flow upward in the resin tank 100.

[0082] Secondly, embodiments of the present invention provide a resin-based water treatment method capable of recovering raw water containing metals through adsorption and desorption using resin 110. This embodiment uses a resin-based water treatment system as described in any embodiment of the first aspect to treat the raw water, including steps one, two, three, four, five, and six, as referred to... Figure 9 .

[0083] Step 1: Adsorption by resin 110. The raw water to be treated is controlled to enter the resin tank 100 from the raw water tank 210, and discharged after being adsorbed by resin 110. For details, refer to... Figure 1 and Figure 5The arrows in the attached diagram indicate the direction of liquid flow. The inlet pump 223 is turned on, and the inlet valve 222, the first gas shut-off valve 225, and the outlet valve 232 remain open. The raw water to be treated in the raw water tank 210 is pumped through the inlet pump 223 to the liquid inlet 140 at the top of the resin tank 100, entering the interior of the resin tank 100 through the liquid inlet 140. After being adsorbed by the resin 110, the raw water is discharged from the resin tank 100 through the inlet / outlet 150 and then discharged through the outlet pipe 231. During this process, the outlet valve 232 remains open, while the second gas shut-off valve 3581, the first air inlet valve 421, the second air inlet valve 431, the vent valve 631, and the sixth control valve 362 remain closed.

[0084] Step two, initial air purging. Raw water flows forward through resin tank 100 at a rate of 1-15 BV / h for adsorption by resin 110. The adsorption endpoint is determined by detecting the metal content at the outlet of water pipe 231. At this point, the resin 110 in resin tank 100 can no longer adsorb any more metal. The air purging assembly 400 supplies compressed air to resin tank 100, causing the raw water in resin tank 100 to be discharged from inlet / outlet 150 to the ground tank 610, and then pumped back to raw water tank 210 by return pump 620.

[0085] Specifically, refer to Figure 1 and Figure 7 The arrows in the attached diagram indicate the direction of gas flow. After the resin 110 has finished adsorbing, the vent valve 631, the first inlet valve 421, and the second inlet valve 431 are opened, while other valves remain closed. By controlling the opening of the first inlet valve 421 and the second inlet valve 431, the gas flow meter 440 displays a compressed air flow rate that meets the gas velocity requirements of the cross-sectional area of ​​the resin tank 100 within the range of 0.1-3 m³ / (m³·min). In this embodiment, 0.1 MPa compressed air is introduced into the resin tank 100, with a flow rate that meets the gas velocity requirements of 1 m³ / (m³·min) across the cross-sectional area of ​​the resin tank 100.

[0086] The raw water in resin tank 100 is rapidly emptied under the action of compressed air, reducing the emptying time. Simultaneously, the compressed air also backflushes the resin 110 adhering to the interceptor cylinder 190 and the intermediate discharge device 120, preventing the resin 110 from clogging these components. Once the liquid at the outlet of the emptying pipe 630 forms water droplets, the first purging is complete. The emptying valve 631, the first air inlet valve 421, and the second air inlet valve 431 are closed, and purging stops. After purging, the first return valve 641 and the return pump 620 are opened to pump the raw water in the ground tank 610 into the raw water tank 210. After the ground tank 610 is emptied, the return pump 621 and the first return valve 641 are closed.

[0087] It is understood that this embodiment uses compressed air to blow from top to bottom to blow out the liquid adsorbed inside the resin 110 and the liquid in the gaps between the resin 110, thereby reducing the dilution of the subsequent desorption acid, ensuring the desorption effect, increasing the metal concentration in the obtained desorption liquid, reducing the raw water drainage time, and ensuring that the resin 110 does not clog the interception cylinder 190 and the intermediate drainage device 120.

[0088] Step 3, Part 1: Analysis. The analysis solution in the analysis solution tank 310 is controlled to enter the resin tank 100 through inlet and outlet 150. It can be understood that the analysis solution is an acid capable of analyzing metals, and the analysis solution tank 310 contains fresh acid from the previous cycle, containing a low concentration of metals.

[0089] During a certain analysis process, the second gas shut-off valve 3581, the sixth control valve 362, and the fourth control valve 331 are opened, while other valves remain closed. The analyzer pump 330 is turned on to begin feeding analyzer into the resin tank 100. The second liquid flow meter 361 monitors the real-time and cumulative flow rates, controlling the flow rate of the analyzer into the resin tank 100 to 1-3 BV / h, gradually forming a laminar flow that slowly rises upwards, pushing out the raw water that was previously remaining in the resin 110 in a water column. The raw water flows out from the regeneration outlet 160 and into the diversion pipe 350. (Refer to...) Figure 1 and Figure 6 The arrows in the attached diagram indicate the direction of liquid flow.

[0090] The acid-base detection component 3582 automatically controls the opening of the first control valve 354, the second control valve 355, and the third control valve 356 to divert different liquids. It can be understood that the liquid just ejected is raw water with a high pH value (pH value greater than or equal to 1.3). After the acid-base detection component 3582 identifies this, it controls the opening of the first control valve 354, transferring the remaining raw water in the resin tank 100 to the raw water tank 210. After the raw water in the resin tank 100 has been completely ejected, the highly concentrated metal-containing leaching solution is gradually ejected. At this time, the acid-base detection component 3582 detects that the pH value rapidly drops to the set value (pH value less than 1.3), controls the closing of the first control valve 354 and the opening of the third control valve 356, diverting the highly concentrated metal-containing leaching solution to the metal liquid distribution pipe 353 for discharge to the recycling workshop.

[0091] Understandably, by performing a series of analyses, it is possible to reduce the amount of high-metal-concentration analysis solution mixed with the raw water, thus preventing the high-metal-concentration analysis solution from being diluted. At the same time, it is also possible to prevent the raw water from diluting the H+ concentration in the analysis solution entering the resin tank 100, which would affect the analysis effect.

[0092] Step 4, Second-stage analysis. Once the second liquid flow meter 361 indicates that enough analysis liquid (usually 1-2 BV) has been delivered into the resin tank 100, the analysis liquid pump 330 and the fourth control valve 331 are turned off. The second-stage analysis is then carried out, and the new acid in the new acid tank 320 is controlled to enter the resin tank 100 through the inlet and outlet 150.

[0093] During the second-stage analysis process, the new acid pump 340 and the fifth control valve 341 are opened to begin feeding new acid into the resin tank 100. The new acid forms a laminar upward flow, pushing the high-metal-concentration analysis solution to the regeneration outlet 160, and then diverting it through the splitter pipe 350 to the metal liquid outlet for discharge and recovery. When the third liquid flow meter 357 shows that the volume of analysis solution added to the resin tank 100 is the same, it is determined that the metal concentration in the liquid discharged from the regeneration outlet 160 is too low. The third control valve 356 is closed, and the second control valve 355 is opened to recover the low-metal-concentration analysis solution into the analysis solution tank 310 for use in the next analysis cycle. When the second liquid flow meter 361 shows that the volume of new acid pumped into the resin tank 100 is the same as the volume of analysis solution, the fifth control valve 341, the sixth control valve 362, and the new acid pump 340 are closed. (Refer to...) Figure 1 and Figure 6 The arrows in the attached diagram indicate the direction of liquid flow.

[0094] Understandably, the utilization rate of acid can be improved through two-stage analysis. Moreover, by not purging after the first stage of analysis, the metal in the analysis liquid can be prevented from being re-adsorbed by resin 110, thereby increasing the metal concentration of the liquid discharged to the metal outlet and improving the analysis efficiency.

[0095] Step 5, secondary air purging. After the second stage of analysis is completed, open the purging valve 631, the first intake valve 421, and the second intake valve 431, while keeping other valves closed, as per [reference needed]. Figure 1 and Figure 7 The arrows in the attached diagram indicate the direction of gas flow. By controlling the opening of the first inlet valve 421 and the second inlet valve 431, the compressed air flow rate displayed by the gas flow meter 440 is made to ensure that the gas flow velocity across the cross-sectional area of ​​the resin tank 100 is within the range of 0.1-3 m³ / (m³·min). The eluent in the resin tank 100 is rapidly emptied under the action of compressed air, reducing the emptying time. At the same time, the compressed air can also backflush the resin 110 adhering to the interceptor cylinder 190 and the intermediate discharge device 120, preventing the resin 110 from clogging the interceptor cylinder 190 and the intermediate discharge device 120. When the liquid at the outlet end of the emptying pipe 630 appears as water droplets, the secondary purging is complete. The emptying valve 631, the first inlet valve 421, and the second inlet valve 431 are closed to stop the purging.

[0096] After the aeration is completed, open the second return valve 642 and the return pump 620 to extract the eluent from the ground pool 610 into the eluent tank 310 for use in the next eluent cycle. (Refer to...) Figure 1 and Figure 8 The arrows in the attached diagram indicate the direction of liquid flow. After the earthen pool 610 is emptied, the return pump 620 and the second return valve 642 are shut off.

[0097] Understandably, by blowing out the adsorbed liquid inside the resin 110 and the residual liquid in the gaps between the resin 110, the waste of the desorption acid can be reduced, the amount of subsequent water washing can be reduced, and the interception cylinder 190 and the middle discharge device 120 can be flushed by airflow to ensure that they are not blocked by the resin 110.

[0098] After the above five steps, one round of raw water adsorption and desorption can be completed. After completing one round of raw water adsorption and desorption, step six, water washing, is required to prevent residual desorption acid in resin tank 100 from affecting the next adsorption in resin 110.

[0099] In some embodiments, after performing step five, the water washing valve 720, the second gas shut-off valve 3581, and the first control valve 354 are opened first, while other valves remain closed. Water is first injected into the resin tank 100 through the inlet and outlet 150, so that the residual eluent in the resin tank 100 is discharged through the regeneration outlet 160 and discharged into the raw water tank 210 along the diversion pipe 350. Then, the water washing step in step six is ​​performed. Specifically, the pure water flow rate in the water washing pipe 710 is controlled to be pumped into the resin tank 100 from the inlet and outlet 150 at the bottom of the resin tank 100 at 2 BV / h. After the pure water pushes the liquid in the resin tank 100 out by 1-2 BV, the water washing valve 720, the second gas shut-off valve 3581, and the first control valve 354 are closed.

[0100] During the washing process, the washing valve 720 is opened, and the pure water flow rate in the washing pipe 710 is controlled to be pumped into the resin tank 100 from the inlet and outlet 150 at the bottom at a rate of 5-10 BV / h. Water is injected into the resin tank 100 through the washing pipe 710 until the water level submerges the resin 110. After the resin 110 has been soaked for a preset time, the air blowing component 400 is controlled to provide compressed air to the resin tank 100, so that the liquid in the resin tank 100 is discharged from the inlet and outlet 150 to the ground pool 610, thereby emptying the residual washing water in the resin tank 100.

[0101] During the water washing process, increasing the water intake can shorten the washing time and achieve the purpose of rinsing the resin 110, thereby flushing out as much acid as possible from inside the resin 110.

[0102] Understandably, this embodiment employs a "rapid water intake – soaking – air purging" mode to backwash the resin tank 100. During the water intake process, the water washing valve 720 and the air vent valve 510 are opened. After the water level submerges the resin 110, the water washing valve 720 and the air vent valve 510 are closed. After water intake is complete, the resin 110 is soaked for a time greater than or equal to 5 minutes and less than or equal to 10 minutes to allow the acid inside the resin 110 to precipitate out. Then, the resin tank 100 is purged with air, following the method described in step two. The "rapid water intake – soaking – air purging" process can be repeated multiple times until the pH value of the liquid collected in the pool 610 is qualified, at which point the next adsorption of the resin 110 can begin.

[0103] Understandably, since pure water enters from the inlet / outlet 150 at the bottom of resin 110, before water washing, the liquid laminar flow in resin tank 100 pushes upwards, displacing as much of the residual eluent in resin 110 as possible, thus reducing the amount of washing water. Furthermore, by adopting the "rapid water intake – soaking – air purging" mode, each air purging minimizes residual acid in resin tank 100, thereby reducing the amount of washing water and backwashing time.

[0104] The following description uses raw water with a pH of 1.88 and Ni of 1286 mg / L as an example. The raw water enters the resin tank 100 at a flow rate of 5 BV / h. After 6 hours of adsorption, the Ni concentration at the outlet of the effluent pipe 231 exceeds the standard, initiating regeneration. The vent valve 631 is opened, and compressed air at 0.1 MPa is introduced into the resin tank 100 through the inlet 140 and the regeneration outlet 160. The flow rate meets the requirement of a gas flow rate of 1 m³ / (m³·min) across the cross-sectional area of ​​the resin tank 100. Air blowing stops when water droplets are observed at the outlet of the vent pipe 630, and the blown-out raw water is pumped back to the raw water tank 210. The previous cycle's analytical solution is pumped into the resin tank 100 at a flow rate of 2 BV / h from the inlet / outlet 150 at the bottom, gradually forming a laminar flow that slowly rises. The raw water remaining in the resin 110 gradually forms a water column and is pushed out. When the pH value of the liquid at the regenerated outlet 160 is greater than or equal to 1.3, the liquid is controlled to flow back to the raw water tank 210; when the pH value of the liquid at the regenerated outlet 160 is less than 1.3, the liquid is controlled to flow back to the metal liquid outlet and discharged to the reuse workshop. After 1 BV of eluent in the eluent tank 310 is delivered into the resin tank 100, new acid with 10% sulfuric acid in the new acid tank 320 is pumped into the resin tank 100 at a rate of 2 BV / h from the inlet / outlet 150 at the bottom of the resin tank 100. After the volume of metal liquid in the reuse workshop reaches 1 BV, the eluent is discharged to the eluent tank 310 for collection through the diversion pipe 350 for the next cycle of regeneration. After the second stage of analysis is completed, the vent valve 631 is opened, and compressed air at 0.1 MPa is introduced into the resin tank 100 through the liquid inlet 140 and the regeneration outlet 160. The flow rate meets the gas flow rate of 1 m³ / (m³·min) across the cross-sectional area of ​​the resin tank 100. The air blowing stops when water droplets are seen at the outlet of the vent pipe 630, and the blown-out analysis liquid is pumped to the analysis liquid tank 310 for collection and use in the next cycle of regeneration. After the second air blowing and venting is completed, the water washing valve 720 is opened, and pure water is pumped into the resin tank 100 from the inlet and outlet 150 at the bottom of the resin tank 100 at a flow rate of 2 BV / h. The liquid is pushed out from the regeneration outlet 160, of which 1 BV of the pushed liquid is discharged to the raw water tank 210. After purging, switch to the intermittent backwashing mode of "rapid water intake - soaking - air blowing". Soak for 5 minutes and air blow for 8 minutes until the pH value of the liquid at the outlet of the 630 drain pipe is greater than 1.8. Then raw water can be introduced and the adsorption of the next cycle can begin.

[0105] After actual use and testing, the raw water treated by the resin water treatment method of this embodiment of the invention has a nickel concentration of 33855 mg / L in the eluent reused in the workshop, a backwash water volume of 3 BV, and a regeneration time of 162 min.

[0106] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A resin water treatment system characterized by comprising: The resin water treatment system comprises a resin tank (100), an inlet-outlet assembly (200), a regeneration assembly (300) and a blowing assembly (400). The resin tank (100) is provided with an inlet (140), an inlet-outlet (150) and a regeneration outlet (160), the inlet (140) is arranged at the top of the resin tank (100), the inlet-outlet (150) is arranged at the bottom of the resin tank (100), the resin tank (100) is used for placing resin (110), and the regeneration outlet (160) is located on the upper side of the resin (110). The inlet-outlet assembly (200) comprises a raw water tank (210), a water inlet component (220) and a water outlet component (230), the outlet end of the raw water tank (210) is connected with the inlet (140) through the water inlet component (220), and the water outlet component (230) is connected with the inlet-outlet (150). The regeneration assembly (300) comprises an eluent tank (310), a new acid tank (320), an eluent pump (330), a new acid pump (340) and a shunt pipe (350), the inlet end of the eluent pump (330) is connected with the eluent tank (310), the outlet end of the eluent pump (330) is connected with the inlet-outlet (150), the inlet end of the new acid pump (340) is connected with the new acid tank (320), the outlet end of the new acid pump (340) is connected with the inlet-outlet (150), the shunt pipe (350) is provided with a raw water port, an eluent port and a metal liquid port, the inlet end of the shunt pipe (350) is connected with the regeneration outlet (160), the raw water port is communicated with the raw water tank (210), the eluent port is communicated with the eluent tank (310), and the metal liquid port is used for discharging metal liquid. The blowing assembly (400) is connected with the inlet (140) and the regeneration outlet (160) respectively to provide compressed air for the resin tank (100).

2. The resin water treatment system of claim 1, wherein The resin water treatment system further comprises a middle discharge device (120) comprising a water collecting main pipe (121) and a plurality of water distribution branch pipes (122), the water collecting main pipe (121) is installed in the resin tank (100) and located on the upper side of the resin (110), the outlet end of the water collecting main pipe (121) is communicated with the regeneration outlet (160), each water distribution branch pipe (122) is communicated with the water collecting main pipe (121) respectively, and the water distribution branch pipe (122) is provided with a water inlet hole. ​ 3. The resin water treatment system of claim 1, wherein The regeneration assembly (300) further comprises an acid-base detection component (3582), a first control valve (354), a second control valve (355) and a third control valve (356), the shunt pipe (350) comprises a main pipe (358), a raw water branch pipe (351), an elution liquid branch pipe (352) and a metal liquid branch pipe (353), the raw water branch pipe (351), the elution liquid branch pipe (352) and the metal liquid branch pipe (353) are connected with the main pipe (358) respectively, the raw water outlet is arranged at the outlet end of the raw water branch pipe (351), the elution liquid outlet is arranged at the outlet end of the elution liquid branch pipe (352), the metal liquid outlet is arranged at the outlet end of the metal liquid branch pipe (353), the acid-base detection component (3582) is arranged at the inlet end of the main pipe (358), the first control valve (354) is arranged on the raw water branch pipe (351), the second control valve (355) is arranged on the elution liquid branch pipe (352), and the third control valve (356) is arranged on the metal liquid branch pipe (353), and the acid-base detection component (3582) is used for detecting the real-time acid-base degree of the inlet end of the main pipe (358).

4. The resin water treatment system of claim 1, wherein The resin water treatment system further comprises: A water washing assembly (700) comprising a water washing pipe (710) and a water washing valve (720), the water washing valve (720) is arranged on the water washing pipe (710), and the outlet end of the water washing pipe (710) is connected with the inlet and outlet (150).

5. The resin water treatment system of claim 1, wherein The resin water treatment system further comprises: A liquid return assembly (600) comprising a pit (610), a liquid return pump (620), a vent pipe (630) and a vent valve (631), the inlet end of the vent pipe (630) is connected with the inlet and outlet (150), the vent valve (631) is arranged on the vent pipe (630), the outlet end of the vent pipe (630) is communicated with the pit (610), the inlet end of the liquid return pump (620) is connected with the pit (610), and the outlet end of the liquid return pump (620) is connected with the raw water tank (210) and the elution liquid tank (310) respectively.

6. The resin water treatment system of claim 1, wherein The air blowing assembly (400) comprises a compressed air pipe (410), a first air inlet valve (421), a second air inlet valve (431), a first air inlet pipe (420) and a second air inlet pipe (430), one end of the first air inlet pipe (420) is connected with the outlet end of the compressed air pipe (410), the other end is connected with the liquid inlet (140), and the first air inlet valve (421) is arranged on the first air inlet pipe (420); one end of the second air inlet pipe (430) is connected with the outlet end of the compressed air pipe (410), the other end is connected with the regeneration water outlet (160), and the second air inlet valve (431) is arranged on the second air inlet pipe (430).

7. The resin water treatment system of claim 1, wherein The resin tank (100) is also provided with an exhaust port (180) located at the top of the resin tank (100), and the resin water treatment system further comprises an exhaust valve (510) and an exhaust pipe (520), the exhaust valve (510) is arranged on the exhaust pipe (520), and the exhaust port (180) is connected with the exhaust pipe (520).

8. A resin water treatment method characterized by, The resin water treatment method applied to the resin water treatment system in any one of claims 1 to 7 comprises the following steps: Step one, resin (110) adsorption: control the raw water from the raw water tank (210) into the resin tank (100), and after the raw water is adsorbed by the resin (110), it is discharged through the inlet and outlet (150); Step two, primary air blowing and emptying: control the blowing assembly (400) to provide compressed air to the resin tank (100) to discharge the residual raw water in the resin tank (100) from the inlet and outlet (150); Step three, one-stage elution: control the elution liquid in the elution liquid tank (310) to enter the resin tank (100) through the inlet and outlet (150); Step four, two-stage elution: control the new acid in the new acid tank (320) to enter the resin tank (100) through the inlet and outlet (150); Step five, secondary air blowing and emptying: control the blowing assembly (400) to provide compressed air to the resin tank (100) to discharge the elution liquid in the resin tank (100) from the inlet and outlet (150).

9. The resin water treatment method according to claim 8, characterized by, The resin water treatment method further comprises the following steps: Step six, water washing: water is injected into the resin tank (100) through the inlet and outlet (150) to a water level state of submerging the resin (110), and after the resin (110) is soaked for a preset time, the blowing assembly (400) is controlled to provide compressed air to the resin tank (100) to discharge the liquid in the resin tank (100) from the inlet and outlet (150).

10. The resin water treatment method according to claim 9, characterized by, After performing the step five, water is first injected into the resin tank (100) through the inlet and outlet (150), so that the residual elution liquid in the resin tank (100) is discharged through the regenerated water outlet (160) into the raw water tank (210), and then the step six is performed.

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