Resin adsorption device beneficial to improving metal enrichment concentration of regenerated liquid

Abstract

The utility model provides a resin adsorption device favorable for improving the metal enrichment concentration of regenerated liquid, which is used for enriching metal ions adsorbed in resin through the regenerated liquid and comprises a resin tank, an industrial water tank, a regeneration agent tank, a low-concentration regenerated liquid tank and a high-concentration regenerated liquid tank. According to the utility model, a resin adsorption process is carried out through the resin tank, so that the metal concentration of the enrichment liquid meets the electrodeposition liquid inlet requirement, the enrichment and concentration process is simplified, and meanwhile, the investment of equipment and operation cost is also reduced; the current efficiency of the subsequent electrodeposition extraction process can be reduced by improving the concentration of metal ions in the regeneration liquid, so that the equipment investment and the power consumption cost of the electrodeposition process are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy metal recovery in waste water, in particular to a resin adsorption device which is beneficial to improving the metal enrichment concentration of regenerated liquid. Background Art

[0002] The first step in heavy metal recovery from wastewater is usually enrichment and concentration, and then the elemental metals are extracted from the enriched liquid by electrolysis. The methods of enrichment and concentration usually include membrane method, extraction method and resin adsorption method. For low-concentration wastewater, the membrane method is used to concentrate it to the concentration required by the downstream process (electrolysis), and the concentration multiple is usually dozens or even hundreds of times. The wastewater needs to be concentrated in multiple stages, which invisibly increases the investment and power consumption cost of the membrane equipment; the extracting liquid used in the extraction method is usually a high-molecular organic matter that is difficult to degrade. The wastewater generated in the extraction process is difficult to treat by biochemical methods, which will bring a series of wastewater treatment problems; in comparison, the resin adsorption method has certain advantages.

[0003] When using the resin adsorption process, when the resin is saturated with adsorption, a certain amount of regeneration agent and water will be mixed in proportion to form a regeneration liquid of a certain concentration to regenerate the resin. At this time, the metal ions adsorbed in the resin will enter the regeneration liquid and be enriched in the regeneration liquid.

[0004] During the resin regeneration process, as the regeneration liquid continues to enter the resin layer, the amount of metal remaining in the resin layer will gradually be eluted into the regeneration liquid, so the metal concentration in the regeneration liquid flowing out of the resin layer will show a gradual downward trend over time.

[0005] In conventional resin adsorption processes, the regeneration liquid flowing out of the resin layer during the regeneration process is generally collected and then sent to the downstream electrowinning process. However, as mentioned above, collecting the regeneration liquid throughout the process will undoubtedly reduce the enrichment effect of the regeneration liquid on the target metal. Utility Model Content

[0006] The utility model aims to provide a resin adsorption device which can improve the enrichment effect of resin regeneration liquid on target metals and solve the problems existing in the prior art in practical applications.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A resin adsorption device that is beneficial to improving the metal enrichment concentration of the regeneration liquid, which is used to enrich the metal ions adsorbed in the resin through the regeneration liquid, comprises a resin tank, an industrial water tank, a regeneration agent tank, a low-concentration regeneration liquid tank and a high-concentration regeneration liquid tank; the resin tank is filled with metal adsorption resin; the resin tank is provided with a water inlet, a water production port, a regeneration liquid inlet, and a regeneration liquid discharge port; wherein the regeneration liquid discharge port comprises a low-concentration regeneration liquid discharge port and a high-concentration regeneration liquid discharge port; water to be treated is connected to the water inlet on the resin tank through a water inlet pipe using a pipeline with a water inlet valve, and water is produced through the water production port on the resin tank using a pipeline with a water production valve connected to a water production pipe; the pipeline of the water production valve A metal ion concentration detector is provided on the branch pipe for detecting the metal ion concentration of the produced water; an outlet of the industrial water tank is connected to the regeneration inlet with a regeneration inlet valve in the resin tank through a pipeline with a regeneration water pump, an outlet of the regeneration agent tank is connected to the regeneration agent valve through a pipeline, and an outlet of the low-concentration regeneration liquid tank is connected to the regeneration inlet with a regeneration inlet valve in the resin tank through a pipeline with a high-concentration regeneration drain valve through the high-concentration regeneration inlet in the resin tank to discharge high-concentration regeneration liquid; a low-concentration regeneration inlet in the resin tank is connected to the low-concentration regeneration liquid tank through a pipeline with a low-concentration regeneration drain valve to discharge low-concentration regeneration liquid.

[0009] Preferably, the resin tank is also provided with a backwash water inlet and a backwash water outlet; the other outlet of the industrial water tank is connected to the backwash water inlet on the resin tank through a backwash water pump using a pipeline with a backwash water inlet valve for water intake, and the backwash water outlet on the resin tank is drained to an external ground ditch using a pipeline with a backwash drain valve.

[0010] Preferably, the resin tank is also provided with a drain port, and the drain port is connected to an external grounding trench through a pipeline with a drain valve.

[0011] Preferably, it also includes a regeneration agent injector, which includes an outlet and two inlets. The outlet of the regeneration agent injector is connected in parallel with a pipeline with a regeneration liquid pump and then connected to the regeneration liquid inlet through the regeneration liquid inlet valve. The two inlets of the regeneration agent injector are connected to the industrial water tank and the regeneration agent tank through the pipeline with the regeneration water pump and the pipeline with the regeneration agent valve, respectively.

[0012] Preferably, the industrial water tank, the regeneration agent tank and the low-concentration regeneration liquid tank are all provided with liquid level gauges; the industrial water tank and the regeneration agent tank are connected to industrial water and regeneration agent respectively through replenishing valves.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) The utility model uses a resin tank to carry out a resin adsorption process so that the metal concentration of the enriched solution meets the requirements of the electrodeposition solution, simplifies the enrichment and concentration process, and also reduces the investment in equipment and operating costs.

[0015] (2) The utility model can reduce the current efficiency of the subsequent electrolytic extraction process by increasing the metal ion concentration in the regeneration liquid, thereby reducing the equipment investment and power consumption cost of the electrolytic extraction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a resin adsorption device for improving the metal enrichment concentration of regenerated liquid provided in an embodiment of the utility model.

[0017] The serial numbers in the figure are as follows:

[0018] 1. Resin tank; 1-1-water inlet valve; 1-2-water production valve; 1-3-backwash inlet valve; 1-4-backwash drain valve; 1-5-drain valve; 1-6-regeneration inlet valve; 1-7-high concentration regeneration liquid drain valve; 1-8-low concentration regeneration liquid drain valve; 1-9-metal ion concentration detector;

[0019] 2. Industrial water tank; 2-1 Industrial water tank level gauge; 2-2 Industrial water tank water supply valve;

[0020] 3. Regeneration agent tank; 3-1 Regeneration agent tank level gauge; 3-2 Regeneration agent replenishing valve; 3-3 Regeneration agent valve;

[0021] 4. Low concentration regeneration liquid tank; 4-1 Low concentration regeneration liquid tank level gauge;

[0022] 5. High-concentration regeneration liquid tank; 6. Ditch; 7. Low-concentration regeneration liquid pump; 8. Regeneration water pump; 9. Backwash water pump; 10. Regeneration agent injector. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] like Figure 1 As shown, a resin adsorption device for improving the metal enrichment concentration of the regeneration liquid disclosed in the utility model is used to enrich the metal ions adsorbed in the resin through the regeneration liquid, including a resin tank 1, an industrial water tank 2, a regeneration agent tank 3, a low-concentration regeneration liquid tank 4 and a high-concentration regeneration liquid tank 5.

[0025] The resin tank 1 is filled with metal adsorption resin; the resin tank 1 is provided with a water inlet, a water production inlet, a regeneration liquid inlet, a regeneration liquid discharge inlet, a backwash water inlet and a backwash water outlet. The regeneration liquid discharge inlet includes a low-concentration regeneration liquid discharge inlet and a high-concentration regeneration liquid discharge inlet.

[0026] The water to be treated is connected to the water inlet on the resin tank 1 through a water inlet pipe using a pipeline with a water inlet valve 1-1, and is connected to the water production pipe through a water production port on the resin tank 1 using a pipeline with a water production valve 1-2 to produce water; a metal ion concentration detector 1-9 is provided on the pipeline branch of the water production valve 1-2 for detecting the metal ion concentration of the produced water.

[0027] An outlet of the industrial water tank 2 is connected to the regeneration liquid inlet with a regeneration liquid inlet valve 1-6 through a pipeline with a regeneration water pump 8, an outlet of the regeneration agent tank 3 is connected to the regeneration liquid inlet with a regeneration agent valve 3-3, and an outlet of the low-concentration regeneration liquid tank 4 is connected to the regeneration liquid inlet with a regeneration liquid inlet valve 1-6 through a pipeline with a regeneration liquid valve 7.

[0028] Furthermore, in this embodiment, a regeneration agent injector 10 is provided, and the regeneration agent injector 10 has three interfaces: one is a regeneration agent inlet, which is connected to the regeneration agent tank 3 through a pipeline with a regeneration agent valve 3-3.

[0029] One is a water inlet, which is connected to an outlet of the industrial water tank 2 through a pipeline with a regeneration water pump 8.

[0030] The last one is the regeneration liquid outlet, which is connected to the regeneration liquid inlet with the regeneration liquid inlet valve 1-6 through a pipeline and a pipeline with a low-concentration regeneration liquid pump 7 through a combined pipe.

[0031] When the regeneration agent injector 10 is working, a certain amount of industrial water enters its water inlet, and a certain amount of regeneration agent is sucked into its regeneration agent inlet. After the two are mixed in the injector, they become resin regeneration liquid and flow out from the injector outlet.

[0032] The other outlet of the industrial water tank 2 is connected to the backwash inlet on the resin tank 1 through a backwash water pump 9 using a pipeline with a backwash inlet valve 1-3, and the backwash outlet on the resin tank 1 is drained through an external ground ditch 6 through a pipeline with a backwash drain valve 1-4.

[0033] The high-concentration regeneration liquid inlet in the resin tank 1 is connected to the high-concentration regeneration liquid tank 5 through a pipeline with a high-concentration regeneration liquid discharge valve 1-7 to discharge the high-concentration regeneration liquid; the low-concentration regeneration liquid inlet in the resin tank 1 is connected to the low-concentration regeneration liquid tank 4 through a pipeline with a low-concentration regeneration liquid discharge valve 1-8 to discharge the low-concentration regeneration liquid.

[0034] Furthermore, the resin tank 1 is provided with a drain port, which is emptied through a grounding trench 6 outside the pipeline with a drain valve 1-5.

[0035] Furthermore, in this embodiment, an industrial water tank level gauge 2-1 is provided in the industrial water tank 2, and industrial water is connected to the outside through the industrial water tank water replenishment valve 2-2. Two liquid levels, a high liquid level (H) and a middle liquid level (M), are set to be interlocked with the industrial water tank water replenishment valve 2-2: when the liquid level is middle, the valve 2-2 opens to start replenishing industrial water into the regenerated water tank 2, and the high liquid level valve 2-2 is closed.

[0036] A regeneration agent tank level gauge 3-1 is provided in the regeneration agent tank 3, and the regeneration agent is externally connected through the regeneration agent replenishing valve 3-2. Two liquid levels, a high liquid level (H) and a low liquid level (L), are set to be interlocked with the regeneration agent replenishing valve 3-2 and the regeneration agent valve 3-3; when the regeneration agent tank 3 is at a low liquid level, the regeneration agent valve 3-3 is closed first, and then the regeneration agent replenishing valve 3-2 is opened after a delay of 5s to start replenishing the regeneration agent into the regeneration agent tank 3. When the regeneration agent tank is at a high liquid level, the regeneration agent replenishing valve 3-2 is closed.

[0037] A low-concentration regeneration liquid tank level gauge 4-1 is provided in the low-concentration regeneration liquid tank 4, whose inlet is connected to the low-concentration regeneration liquid drain valve 1-8 through a pipeline, and whose outlet is connected to the inlet of the low-concentration regeneration liquid pump 7 through a pipeline. The low-concentration regeneration liquid tank level gauge 4-1 is provided with at least one low liquid level interlocking with the low-concentration regeneration liquid pump 7, so that the operation of the low-concentration regeneration liquid pump 7 is stopped when the liquid level is low.

[0038] The working principle of the utility model is as follows:

[0039] Before working, the device must be checked in advance to ensure that all valves and water pumps are in the closed state. This device has a working cycle that includes the following 5 procedures: adsorption, backwash 1, emptying, regeneration and backwash 2.

[0040] The first working cycle of the device operates as follows:

[0041] (1) Adsorption

[0042] Open the water inlet valve 1-1 and the water production valve 1-2, and the water to be treated enters the resin tank 1 from the water inlet valve, flows through the resin layer from top to bottom, and then flows out from the water production valve 1-2.

[0043] When the water to be treated flows through the resin layer, the target metal ions in the water to be treated will be adsorbed by the resin, and the water (product water) with the metal ions removed will be discharged from the system. During the adsorption process, the metal ion concentration of the product water is constantly monitored by the metal ion concentration detector 1-9. When the concentration is higher than the set value, the water inlet valve 1-1 and the product water valve 1-2 are closed to end the adsorption process.

[0044] (2) Backwash 1

[0045] First open the backwash inlet valve 1-3 and the backwash drain valve 1-4, then open the backwash water pump 9, the cleaning water will enter the resin tank, flow through the resin layer from bottom to top, clean the resin, and the backwash water will flow out from the backwash drain valve 1-4 into the ditch.

[0046] When the backwash 1 time t1 = 30 min (adjustable), first turn off the backwash water pump 9, then close the backwash water inlet valve 1-3 and the backwash drain valve 1-4, and the backwash process ends.

[0047] (3) Emptying

[0048] Open drain valve 1-5 to drain the water in the resin tank to prevent the water in the resin tank from diluting the metal ion concentration in the regeneration liquid.

[0049] When the emptying time t2 = 3 min (adjustable), the emptying valve 1-5 is closed. The emptying process is completed.

[0050] (4)Regeneration

[0051] ① First open the regeneration liquid inlet valve 1-6 and the high concentration regeneration liquid discharge valve 1-7

[0052] ② After a delay of 5s, the regeneration water pump 8 is opened, and after a delay of 5s, the regeneration agent valve 3-3 is opened, and the t3 timing is started at the same time.

[0053] ③ When t3 = 30min (adjustable), first open the low-concentration regeneration liquid drain valve 1-8, and then close the high-concentration regeneration liquid drain valve 1-7.

[0054] ④ When the regeneration agent tank 3 reaches a low liquid level, first close the regeneration agent valve 3-3, start t4 timing at the same time, then open the regeneration agent replenishing valve 3-2, and when the liquid level in the regeneration agent tank reaches a high liquid level, close the regeneration agent replenishing valve 3-2.

[0055] ⑤ When t4 = 20min (adjustable), first turn off the regeneration water pump 8, then close the regeneration liquid inlet valve 1-6 and the low-concentration regeneration liquid discharge valve 1-8.

[0056] The regeneration process ends here.

[0057] Note: When the regeneration agent tank 3 reaches a low liquid level, the regeneration agent valve 3-3 is closed first, but the regeneration water pump 8 continues to work, and the working time is t4=20min (adjustable). The purpose of this step is to use industrial water to push the regeneration liquid in the resin tank out of the resin tank in the same direction and at a similar flow rate as regeneration. This step can be regarded as a continuation of regeneration.

[0058] (5) Backwash 2

[0059] First open the backwash inlet valve 1-3 and the backwash drain valve 1-4, then open the backwash water pump 9, the cleaning water will enter the resin tank, flow through the resin layer from bottom to top, clean the resin, and the backwash water will flow out from the backwash drain valve 1-4 into the ditch.

[0060] After the backwash 2 time t5 = 30 min (adjustable), first turn off the backwash water pump 9, then close the backwash water inlet valve 1-3 and the backwash drain valve 1-4, and the backwash process ends.

[0061] The main purpose of backwash 2 is to clean the residual regeneration liquid in the resin layer so that the equipment can be put into the next working cycle.

[0062] At this point, the device can enter the second working cycle. The second working cycle still includes five procedures: adsorption, backwash 1, emptying, regeneration and backwash 2. Except for the regeneration step, which is different from the first cycle, the other steps are the same. The details are as follows:

[0063] (1) Adsorption

[0064] The process is the same as the first cycle.

[0065] (2) Backwash 1

[0066] The process is the same as the first cycle.

[0067] (3) Emptying

[0068] The process is the same as the first cycle.

[0069] (4)Regeneration

[0070] ① First open the regeneration liquid inlet valve 1-6 and the high concentration regeneration liquid discharge valve 1-7.

[0071] ② After a delay of 5s, the low-concentration regeneration liquid pump is turned on. When the low-concentration regeneration liquid tank 4 reaches the low liquid level, the low-concentration regeneration liquid pump 7 is turned off first.

[0072] ③ After a delay of 5s, open the regeneration water pump 8, and after a delay of 5s, open the regeneration agent valve 3-3, and start the t3 timing at the same time.

[0073] ④ When t3 = 30min (adjustable), first open the low-concentration regeneration liquid drain valve 1-8, and then close the high-concentration regeneration liquid drain valve 1-7.

[0074] ⑤ When the regeneration agent tank 3 reaches a low liquid level, first close the regeneration agent valve 3-3, start t4 timing at the same time, then open the regeneration agent replenishing valve 3-2, and when the liquid level in the regeneration agent tank reaches a high liquid level, close the regeneration agent replenishing valve 3-2.

[0075] ⑥ When t4 = 20min (adjustable), first turn off the regeneration water pump 8, then close the regeneration liquid inlet valve 1-6 and the low-concentration regeneration liquid discharge valve 1-8.

[0076] The regeneration process ends here.

[0077] (5) Backwash 2

[0078] The process is the same as the first cycle.

[0079] When the backwash 2 process is finished, the resin adsorption device ends the second working cycle, and the device can continue to be put into the next working cycle. Each subsequent working cycle can be executed completely according to the operating steps of the second working cycle.

[0080] The traditional device collects the regeneration liquid generated by the resin regeneration in the whole process, while the utility model collects the regeneration liquid in different time periods and reuses part of the regeneration liquid. The utility model collects the high-concentration regeneration liquid of the process separately and then directly uses it in the subsequent electrolytic extraction process; however, the low-concentration regeneration liquid generated in the later stage of the regeneration process is collected separately and reused for the regeneration of the resin to further increase the metal ion concentration therein so that it meets the electrolytic extraction process.

[0081] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0083] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A resin adsorption device that is beneficial to increasing the metal enrichment concentration of the regeneration liquid, used to enrich the metal ions adsorbed in the resin through the regeneration liquid, characterized in that: It comprises a resin tank (1), an industrial water tank (2), a regeneration agent tank (3), a low-concentration regeneration liquid tank (4) and a high-concentration regeneration liquid tank (5); The resin tank (1) is filled with metal adsorption resin; the resin tank (1) is provided with a water inlet, a water outlet, a regeneration liquid inlet, and a regeneration liquid outlet; wherein the regeneration liquid outlet comprises a low-concentration regeneration liquid outlet and a high-concentration regeneration liquid outlet; The water to be treated is connected to the water inlet of the resin tank (1) through a water inlet pipe using a pipeline with a water inlet valve (1-1), and is connected to the water production pipe through a water production port on the resin tank (1) using a pipeline with a water production valve (1-2) to produce water; a metal ion concentration detector (1-9) is provided on the pipeline branch of the water production valve (1-2) for detecting the metal ion concentration of the produced water; An outlet of the industrial water tank (2) is connected to a regeneration liquid inlet with a regeneration liquid inlet valve (1-6) in the resin tank (1) through a pipeline with a regeneration water pump (8), an outlet of the regeneration agent tank (3) is connected to a pipeline with a regeneration agent valve (3-3), and an outlet of the low-concentration regeneration liquid tank (4) is connected to a regeneration liquid inlet with a regeneration liquid inlet valve (1-6) in the resin tank (1) through a pipeline with a low-concentration regeneration liquid pump (7); The high-concentration regeneration liquid inlet in the resin tank (1) is connected to the high-concentration regeneration liquid tank (5) through a pipeline with a high-concentration regeneration liquid discharge valve (1-7) to discharge high-concentration regeneration liquid; the low-concentration regeneration liquid inlet in the resin tank (1) is connected to the low-concentration regeneration liquid tank (4) through a pipeline with a low-concentration regeneration liquid discharge valve (1-8) to discharge low-concentration regeneration liquid.

2. A resin adsorption device for increasing the metal enrichment concentration of the regeneration liquid according to claim 1, characterized in that: The resin tank (1) is also provided with a backwash water inlet and a backwash water outlet; the other outlet of the industrial water tank (2) is connected to the backwash water inlet on the resin tank (1) via a backwash water pump (9) using a pipeline with a backwash water inlet valve (1-3) to take in water, and the backwash water outlet on the resin tank (1) is connected to an external ground ditch (6) via a pipeline with a backwash water drain valve (1-4) to drain water.

3. A resin adsorption device for increasing the metal enrichment concentration of regeneration liquid according to claim 1, characterized in that: The resin tank (1) is also provided with a drain port, and the drain port is connected to an external grounding trench (6) through a pipeline with a drain valve (1-5).

4. A resin adsorption device for increasing the metal enrichment concentration of the regeneration liquid according to claim 1, characterized in that: It also includes a regeneration agent injector (10), which includes an outlet and two inlets. The outlet of the regeneration agent injector (10) is connected in parallel with a pipeline with a regeneration liquid pump (7) and then connected to the regeneration liquid inlet through the regeneration liquid inlet valve (1-6). The two inlets of the regeneration agent injector (10) are connected to the industrial water tank (2) and the regeneration agent tank (3) through a pipeline with a regeneration water pump (8) and a pipeline with a regeneration agent valve (3-3), respectively.

5. A resin adsorption device for increasing the metal enrichment concentration of regeneration liquid according to claim 1, characterized in that: The industrial water tank (2), the regeneration agent tank (3) and the low-concentration regeneration liquid tank (4) are all provided with liquid level gauges; the industrial water tank (2) and the regeneration agent tank (3) are connected to industrial water and regeneration agent respectively via replenishment valves.

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