Nickel recovery equipment

Abstract

The utility model discloses nickel recovery equipment. The nickel recovery equipment comprises an adjusting mechanism, an adsorption mechanism, a pickling mechanism and a control device, the adjusting mechanism comprises an adjusting device, a filtering device and a source water device, the water outlet end of the adjusting device is in butt joint with the water inlet end of the filtering device, and the water outlet end of the filtering device is in butt joint with the water inlet end of the source water device; the adsorption mechanism comprises a resin tower, an alkali liquor storage device and an alkali adding pump, and the resin tower is provided with a spectrophotometer; the pickling mechanism comprises an acid liquid storage device, an acid adding pump and a saturated liquid collecting device; and the control device is electrically connected with the adjusting mechanism, the adsorption mechanism and the pickling mechanism. Through the nickel recovery equipment, the nickel recovery efficiency can be improved, the nickel recovery equipment is convenient and rapid, meanwhile, resin regeneration is achieved, continuous production is achieved, the production benefit is improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of nickel recycling technology, and in particular to a nickel recycling device. Background Technology

[0002] Nickel content in electroplating wastewater is one of the key indicators for wastewater discharge. During electroplating, most of the nickel sulfate and nickel chloride added to the plating tank are carried out by the workpieces and end up in the wastewater treatment plant. However, nickel ions will still be present in the wastewater. Current common nickel recovery methods typically involve adsorption using single-resin or triple-resin towers, followed by manual judgment or assessment at fixed time intervals. However, this method often results in insufficient nickel recovery from the wastewater, leading to repeated operations and increased recovery costs. Utility Model Content

[0003] To address the aforementioned technical problems, this invention provides a nickel recovery device that can fully recover nickel from wastewater while reducing recovery costs.

[0004] According to a first aspect of the present invention, a nickel recovery device includes: an adjustment mechanism, an adsorption mechanism, an acid washing mechanism, and a control device; the adjustment mechanism includes an adjustment device, a filtration device, and a source water device, wherein the outlet of the adjustment device is connected to the inlet of the filtration device, and the outlet of the filtration device is connected to the inlet of the source water device; the adsorption mechanism includes a resin tower, an alkali storage tank, and an alkali addition pump, wherein the resin tower is connected to the outlet of the source water device, the inlet of the alkali storage tank is connected to the resin tower, and the alkali addition pump... The pump's inlet is connected to the outlet of the alkali storage tank, and the outlet of the alkali pump is connected to the resin tower, which is equipped with a spectrophotometer. The acid washing mechanism includes an acid storage tank, an acid pump, and a saturated liquid collection device. The outlet of the acid storage tank is connected to the acid pump, the inlet of the acid storage tank is connected to the resin tower, and the outlet of the acid pump is connected to both the resin tower and the saturated liquid collection device. The control device is electrically connected to the regulating mechanism, the adsorption mechanism, and the acid washing mechanism.

[0005] In some embodiments of this utility model, a vortex assembly is provided inside the resin tower. The vortex assembly includes an inlet pipe, an outlet pipe, and a control valve. The control valve is connected to the inlet pipe and electrically connected to the control device. The inlet pipe extends horizontally into the resin tower, and the outlet pipe is vertically disposed inside the resin tower and is connected to the inlet pipe. The outlet pipe has multiple outlet holes, which are arranged along the axial direction of the outlet pipe.

[0006] In some embodiments of this utility model, the air inlet pipe includes a first pipe and a second pipe, and multiple air outlet pipes are provided. One end of the first pipe is located outside the resin tower, and the other end of the first pipe is located inside the resin tower. The second pipe is generally annular, and the multiple air outlet pipes are all vertically arranged and connected to the second pipe. The multiple air outlet pipes are arranged circumferentially along the second pipe, and the axis of the air outlet intersects the axis of the second pipe.

[0007] In some embodiments of this utility model, a breather valve and a safety valve are provided at the upper end of the resin tower, and both the breather valve and the safety valve are connected to the interior of the resin tower.

[0008] In some embodiments of this utility model, an infrared transmitter and an infrared receiver are provided inside the resin tower. Both the infrared transmitter and the infrared receiver are electrically connected to the control device, and the infrared transmitter and the infrared receiver are arranged correspondingly.

[0009] In some embodiments of this utility model, two sets of water distribution components are provided inside the resin tower. The two sets of water distribution components are respectively located at both ends of the resin tower. Each water distribution component includes a partition plate and multiple water distributors. The partition plate cooperates with the inner wall of the resin tower to form a receiving space at the end of the resin tower. The multiple water distributors are arranged in an array on the side of the partition plate facing away from the receiving space. The water distributors are in communication with the receiving space.

[0010] In some embodiments of this utility model, two resin towers are provided, and a series pipe is provided between the two resin towers. A switch valve is provided on the series pipe, and the series pipe is connected to both resin towers.

[0011] In some embodiments of this utility model, the source water device includes a source water tank and a source water pump. The outlet of the filter device is connected to the source water tank. The source water pump is electrically connected to the control device. The source water tank is connected to the resin tower through the source water pump.

[0012] In some embodiments of this invention, the side wall of the resin tower is provided with an observation window.

[0013] In some embodiments of this utility model, the resin tower is connected to a collection pipe, the collection pipe includes a vertically arranged vertical pipe, and horizontal pipes are connected to both ends of the vertical pipe. The horizontal pipe near the lower end is connected to the lower part of the resin tower, and the spectrophotometer is arranged in the horizontal pipe near the upper end.

[0014] Compared with the prior art, the nickel recovery equipment of this utility model has the following advantages: After the pH value of the wastewater is adjusted by the regulating device, it is sent to the source water device after sterilization and filtration. The source water device then transports the adjusted wastewater to the resin tower for adsorption treatment. Based on the change in nickel concentration in the wastewater detected by the spectrophotometer, the control device drives the source water device to change the wastewater delivery rate. This avoids the diluted wastewater from washing away the resin when the nickel concentration decreases, which would reduce the resin adsorption efficiency. This ensures resin adsorption, reduces the flow of nickel ions to the wastewater station, and improves nickel recovery efficiency. Then, the nickel in the resin is eluted by the acid washing mechanism. By detecting the concentration of the eluent, it is determined whether the nickel in the resin has been completely eluted. This monitoring is convenient and cost-effective. The nickel is then recovered by recycling the eluent. Finally, alkali is pumped into the resin tower by the alkali pump to regenerate the resin. This is convenient, fast, and enables continuous production, improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a nickel recovery device according to the first aspect of this utility model;

[0016] Figure 2 This is a cross-sectional view of the resin tower in the nickel recovery equipment according to the first aspect of this utility model;

[0017] Figure 3 This is a top view of the water distributor and partition plate in the nickel recovery equipment according to the first aspect of this utility model;

[0018] Figure 4 This is a top view of the air inlet pipe in the nickel recovery equipment according to the first aspect of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] Regulating device 110; Filtration device 120; Raw water device 130; Raw water tank 131; Raw water pump 132;

[0021] Resin tower 210; series pipe 211; switch valve 212; observation window 213; alkali storage tank 221; alkali pump 222; breather valve 231; safety valve 232; partition plate 241;

[0022] Water distributor 242; containment space 243; air inlet pipe 251; air outlet pipe 252; air outlet 253; first pipe 254; second pipe 255; infrared transmitter 261; infrared receiver 262; spectrophotometer 270;

[0023] Acid storage tank 311; acid pump 312; saturated liquid collection device 320. Detailed Implementation

[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0025] The nickel recovery equipment according to a first aspect of this utility model includes: an adjustment mechanism, an adsorption mechanism, an acid washing mechanism, and a control device; the adjustment mechanism includes an adjustment device 110, a filtration device 120, and a source water device 130, with the outlet of the adjustment device 110 connected to the inlet of the filtration device 120, and the outlet of the filtration device 120 connected to the inlet of the source water device 130; the adsorption mechanism includes a resin tower 210, an alkali storage tank 221, and an alkali pump 222, with the resin tower 210 connected to the outlet of the source water device 130, and the alkali pump 222 connected to the alkali storage tank 210. 21 and resin tower 210 are connected together, and resin tower 210 is equipped with spectrophotometer 270; the acid washing mechanism includes acid storage tank 311, acid pump 312 and saturated liquid collection device 320. The water inlet of acid storage tank 311 is connected to resin tower 210, the water inlet of acid pump 312 is connected to the water outlet of acid storage tank, the water outlet of acid pump 312 is connected to saturated liquid collection device 320 and resin tower 210 respectively, and the water inlet of acid adding device 310 is connected to resin tower 210; the control device is electrically connected to the regulating mechanism, adsorption mechanism and acid washing mechanism respectively.

[0026] The wastewater is fed into the conditioning device 110, where purified water is added to adjust the pH value. Then, a non-oxidizing bactericide is added to the wastewater to reduce and inhibit fungal growth, thus preventing interference with the resin's adsorption of nickel ions and maintaining its adsorption capacity. This also improves the purity of the saturated eluent obtained from subsequent acid washing. Additionally, the filtration device 120 filters out other impurities from the wastewater, increasing the purity of nickel ions and reducing the impact of other impurities on nickel ion recovery.

[0027] Understandably, a vortex assembly is installed inside the resin tower 210. This assembly includes an inlet pipe 251, an outlet pipe 252, and a control valve. The control valve is connected to the inlet pipe 251 and electrically connected to a control device. The inlet pipe 251 extends horizontally into the resin tower 210, while the outlet pipe 252 is vertically positioned within the resin tower 210 and is connected to the inlet pipe 251. The outlet pipe 252 has multiple outlet holes 253 arranged axially along its axis. When the control valve opens, compressed gas enters the outlet pipe 252 through the inlet pipe 251 and is ejected through the outlet holes 253. The ejected gas drives the liquid to rotate, forming a vortex that stirs the liquid, thereby improving adsorption efficiency, elution efficiency, and regeneration efficiency.

[0028] Specifically, the air inlet pipe 251 includes a first pipe 254 and a second pipe 255. The first pipe 254 is connected to the second pipe 255, and the second pipe 255 is connected to the air outlet pipe 252. The first pipe 254 extends into the resin tower 210 from the outside and connects to the external air source. The second pipe 255 is generally ring-shaped and is horizontally arranged inside the resin tower 210. Multiple air outlet pipes 252 are provided, and the multiple air outlet pipes 252 are arranged around the circumference of the second pipe 255. The angle formed by the intersection of the axis of the air outlet 253 and the projection of the axis of the second pipe 255 is an acute angle, so that after the gas is blown out, it drives the liquid to form a vortex in the resin tower 210, thereby improving the success rate of forming the vortex.

[0029] Understandably, the upper end of the resin tower 210 is equipped with a breather valve 231 and a safety valve 232. Both the breather valve 231 and the safety valve 232 are connected to the interior of the resin tower 210 and are electrically connected to the control device. When the outlet pipe 252 agitates the liquid, the gas pressure inside the resin tower 210 increases. The gas entering the resin tower 210 from the inlet pipe 251 is discharged through the breather valve 231, preventing the gas pressure inside the resin tower 210 from continuously increasing and damaging the resin tower 210, thus reducing safety risks. At the same time, the breather valve 231 can prevent external contamination inside the resin tower 210. When the resin tower 210 is undergoing acid leaching, water washing, or resin regeneration, if it is affected by abnormal reasons and the pressure inside the tower increases, the safety valve 232 automatically opens to release pressure, reducing the pressure inside the resin tower 210. Simultaneously, the control device immediately stops the operation of all mechanisms and sounds an alarm, effectively protecting the equipment and reducing the risk of equipment damage.

[0030] Understandably, referring to Figure 2 The resin tower 210 has an observation window 213 on its side wall, which allows for easy and intuitive observation of the conditions inside the resin tower 210, timely detection of problems, and avoidance of impact on production efficiency.

[0031] It is also understandable that the resin tower 210 is connected to a collection pipe, which includes a vertically arranged vertical pipe 272. Both ends of the vertical pipe 272 are connected to horizontal pipes 271. The horizontal pipe 271 near the lower end is connected to the lower part of the resin tower 210, and the spectrophotometer 270 is located in the horizontal pipe 271 near the upper end. The spectrophotometer 270 improves detection accuracy by detecting the liquid concentration in the collection pipe, avoiding detection deviations caused by uneven solution concentration distribution within the resin tower 210. Furthermore, by setting up the vertical pipe 272, the liquid is transported from bottom to top, filling the vertical pipe 272 and ensuring that the liquid inside the vertical pipe 272 remains in a full state, further improving the detection accuracy of the spectrophotometer.

[0032] It is understood that an infrared transmitter 261 and an infrared receiver 262 are installed inside the resin tower 210. Both the infrared transmitter 261 and the infrared receiver 262 are electrically connected to the control device, and are correspondingly arranged. The infrared transmitter 261 and the infrared receiver 262 are installed near the upper end of the resin tower 210. The alkali pump 222 delivers alkali solution into the resin tower 210, promoting resin regeneration. During the resin regeneration stage, when the resin expands to a height between the infrared transmitter 261 and the infrared receiver 262, it blocks the infrared receiver 262 from receiving infrared light, thus determining whether the resin regeneration is complete. This achieves automatic detection of resin regeneration, which is convenient and fast. When the control device detects a good signal from the infrared receiver 262, it controls the source water device 130 to start a new round of adsorption, achieving automated adsorption treatment and improving production efficiency.

[0033] Understandably, the resin tower 210 is equipped with two sets of water distribution components, which are respectively located at both ends of the resin tower 210. Each water distribution component includes a partition plate 241 and multiple water distributors 242. The partition plate 241 cooperates with the inner wall of the resin tower 210 to form a receiving space 243 at the end of the resin tower 210. Multiple water distributors 242 are arrayed on the side of the partition plate 241 facing away from the receiving space 243, and the water distributors 242 are connected to the receiving space 243. Wastewater enters the resin tower 210 from the upper part. The source water device 130 transports the wastewater to the receiving space 243 located at the upper part of the resin tower 210, and then it enters the resin tower 210 through the water distributors 242. The water distributors 242 effectively disperse the wastewater as it enters the resin tower 210, allowing the nickel-containing wastewater to fully contact and adsorb with the resin, reducing the escape of metallic nickel ions with the wastewater. It should be noted that the resin tower 210 is made of PPN, which has good toughness, strong welding ability, high temperature resistance (≤100℃), pressure resistance (≤1.0MPa), strong acid and strong alkali resistance, and is easier to weld and manufacture, which facilitates the structure of the water distributor 242.

[0034] Additionally, acid enters resin tower 210 from its lower end, then flows into a lower water storage space before passing through water distributor 242 and filling the tower. This ensures thorough contact between the acid and resin. After a set elution time, the eluent is discharged through water distributor 242 at the top of the tower, returning to acid storage tank 312. If the returned eluent is saturated, it is sent to saturated collection device 320. If not saturated, it is retained for the next elution until saturated, then sent to saturated collection device 320. The prepared acid is then replenished to acid storage tank 312. Similarly, alkali enters resin tower 210 from its lower end to replenish resin until regeneration. The consumed liquid returns from the top of resin tower 210 to alkali storage tank 221, and is then discharged by alkali pump 222.

[0035] Understandably, there are two resin towers 210, connected by a series pipe 211. A switch valve 212 is installed on the series pipe, and both series pipes 211 are connected to both resin towers 210. When one resin tower 210 becomes saturated with adsorption, but the wastewater still contains nickel ions, the switch valve 212 can be opened, connecting the two resin towers 210 via the series pipe 211, allowing the wastewater to be transferred to the other resin tower 210 for continued adsorption. Then, the switch valve 212 is closed, and the saturated resin undergoes acid washing and regeneration, improving production efficiency while ensuring the efficient recovery of nickel from the wastewater.

[0036] Understandably, the source water device includes a source water tank 131 and a source water pump 132. The outlet of the filter device 120 is connected to the source water tank 131, and the source water pump 132 is electrically connected to the control device. The source water tank 131 is connected to the resin tower 210 through the source water pump 132. The filter device 120 filters wastewater into the source water tank 131, and then the wastewater is transported to the resin tower 210 through the source water pump 132.

[0037] The nickel recovery process applied to the nickel recovery equipment of the first aspect embodiment of this utility model includes the following steps:

[0038] (1) Collect the wastewater into the regulating device 110 and adjust the pH value of the wastewater to avoid the wastewater neutralizing the resin acid and base and to avoid affecting the resin adsorption capacity.

[0039] (2) Add bactericide to the regulating device 110 to kill and inhibit fungi, reduce the impact on the resin adsorption capacity and improve the purity of the subsequent saturated liquid.

[0040] (3) The filter device 120 filters the wastewater to the source water device 130 and transports the wastewater to the resin tower 210 for adsorption. During adsorption, the flow rate of the wastewater is adjusted by detecting the concentration of nickel ions to avoid the wastewater washing away the resin, affecting the resin adsorption, and causing an increase in the amount of nickel flowing out of the wastewater station.

[0041] (4) After adsorption is complete, the acid pump 312 sends the acid from the acid storage tank 311 into the resin tower 210 to elute the resin.

[0042] (5) After the set elution time is reached, the eluent is returned to the acid addition device 310. The pH value of the eluent is detected. If the pH value reaches the set value, the eluent is saturated. The eluent is sent to the saturated liquid collection device 320, and then acid is added again to continue elution. If the pH value does not reach the set value, the eluent is not saturated and is left in the acid addition device 310 for use in the next elution.

[0043] (6) The alkali pump 222 delivers alkali solution from the alkali solution storage tank 221 to the resin tower 210 to regenerate the resin tower 210. During resin regeneration, if the resin does not reach the set height, alkali solution is added quantitatively until the resin production reaches the set height. After the resin reaches the set height, the pH value of the alkali solution is detected. If it is less than the set pH value, it is discharged. If it is greater than the set pH value, it is retained for the next resin regeneration.

[0044] Understandably, in step (3), the spectrophotometer 270 detects the nickel concentration in the wastewater inside the resin tower 210, and the source water device 130 adjusts the flow rate of the wastewater delivered to the resin tower 210 based on the detected nickel concentration. If the nickel concentration in the wastewater decreases, the flow rate of the wastewater is reduced to prevent the diluted wastewater from scouring the resin and affecting the resin's adsorption of nickel ions. This also prevents nickel ions from flowing out of the resin tower 210 due to the resin's failure to adsorb nickel ions in time, thereby reducing the amount of nickel ions flowing out of the resin tower 210.

[0045] The above description is only a preferred embodiment of the present utility model. It should be noted that for ordinary counting personnel in this technical field, several improvements and substitutions can be made without departing from the counting principle of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A nickel recovery device, characterized in that, Including: The regulating mechanism includes a regulating device, a filtering device, and a source water device. The outlet of the regulating device is connected to the inlet of the filtering device, and the outlet of the filtering device is connected to the inlet of the source water device. The adsorption mechanism includes a resin tower, an alkali storage tank, and an alkali pump. The resin tower is connected to the outlet of the source water device, the inlet of the alkali storage tank is connected to the resin tower, the inlet of the alkali pump is connected to the outlet of the alkali storage tank, and the outlet of the alkali pump is connected to the resin tower. The resin tower is equipped with a spectrophotometer. The pickling mechanism includes an acid reservoir, an acid pump, and a saturated liquid collection device. The outlet of the acid reservoir is connected to the acid pump, the inlet of the acid reservoir is connected to the resin tower, and the outlet of the acid pump is connected to both the resin tower and the saturated liquid collection device. The control device is electrically connected to the adjustment mechanism, the adsorption mechanism, and the acid washing mechanism, respectively.

2. The nickel recovery equipment according to claim 1, characterized in that, The resin tower is equipped with a vortex assembly, which includes an inlet pipe, an outlet pipe, and a control valve. The control valve is connected to the inlet pipe and electrically connected to the control device. The inlet pipe extends horizontally into the resin tower, and the outlet pipe is vertically positioned inside the resin tower and is connected to the inlet pipe. The outlet pipe has multiple outlet holes arranged along the axial direction of the outlet pipe.

3. The nickel recovery equipment according to claim 2, characterized in that, The air inlet pipe includes a first pipe and a second pipe. Multiple air outlet pipes are provided. One end of the first pipe is located outside the resin tower, and the other end of the first pipe is located inside the resin tower. The second pipe is generally ring-shaped. The multiple air outlet pipes are all vertically arranged and connected to the second pipe. The multiple air outlet pipes are arranged circumferentially along the second pipe. The axis of the air outlet intersects the projection line of the axis of the second pipe.

4. The nickel recovery equipment according to claim 2, characterized in that, The upper end of the resin tower is equipped with a breather valve and a safety valve, both of which are connected to the interior of the resin tower.

5. The nickel recovery equipment according to claim 1, characterized in that, An infrared transmitter and an infrared receiver are installed inside the resin tower. Both the infrared transmitter and the infrared receiver are electrically connected to the control device, and the infrared transmitter and the infrared receiver are arranged correspondingly.

6. The nickel recovery equipment according to claim 1, characterized in that, The resin tower is equipped with two sets of water distribution components, which are respectively located at both ends of the resin tower. Each water distribution component includes a partition plate and multiple water distributors. The partition plate cooperates with the inner wall of the resin tower to form a receiving space at the end of the resin tower. The multiple water distributors are arranged in an array on the side of the partition plate facing away from the receiving space, and the water distributors are in communication with the receiving space.

7. The nickel recovery equipment according to claim 1, characterized in that, There are two resin towers, and a series pipe is provided between the two resin towers. A switch valve is provided on the series pipe, and the series pipe is connected to both resin towers.

8. The nickel recovery equipment according to claim 1, characterized in that, The source water device includes a source water tank and a source water pump. The outlet of the filter device is connected to the source water tank. The source water pump is electrically connected to the control device. The source water tank is connected to the resin tower through the source water pump.

9. The nickel recovery equipment according to claim 1, characterized in that, The resin tower is provided with an observation window on its side wall.

10. The nickel recovery equipment according to claim 1, characterized in that, The resin tower is connected to a collection pipe, which includes a vertically arranged vertical pipe and horizontal pipes connected to both ends of the vertical pipe. The horizontal pipe near the lower end is connected to the lower part of the resin tower, and the spectrophotometer is installed in the horizontal pipe near the upper end.

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