Device and method for regenerating iron-poisoned resin and synchronously treating electroplating wastewater

Abstract

The invention discloses a device and a method for regenerating iron-poisoned resin and synchronously treating electroplating wastewater. Iron-poisoned resin in an iron-poisoned resin storage tank enters a spray cleaning tower for impurity removal, cleaning water is physically purified by a barrier and then is circularly pumped into the spray cleaning tower, the iron-poisoned resin subjected to impurity removal enters a pretreatment device for pretreatment, and the pretreated resin enters a resin regeneration-electroplating wastewater synchronous treatment device; the filtered electroplating wastewater is introduced for metal ion replacement, the generated iron-containing complex wastewater enters the iron-containing tail water treatment device to be treated and discharged after reaching the standard, and the generated resin enters the resin regeneration device for regeneration of the resin and recovery of heavy metal resources. The method can continuously realize regeneration of iron-poisoned resin and synchronous treatment of electroplating wastewater, has a remarkable treatment effect on a heavy metal citric acid complex, and has a resin regeneration rate gt; the heavy metal recovery rate is gt; 90%.

Description

Technical Field

[0001] The invention belongs to the field of iron poisoning resin and electroplating wastewater treatment, and relates to a device and method for regenerating iron poisoning resin and synchronously treating electroplating wastewater. Background Art

[0002] Ion exchange resin is a kind of macromolecular compound with a network structure and functional groups. Its structure consists of three parts: an insoluble three-dimensional network skeleton, functional groups connected to the skeleton, and exchangeable ions with opposite charges carried by the functional groups. Due to its unique active functional groups, it can undergo ion exchange adsorption with heavy metals to remove, concentrate, and recover heavy metal ions in the solution. Ion exchange resin has the advantages of large specific surface area, high adsorption capacity, and easy desorption and regeneration, which makes it widely used in the field of heavy metal contaminated wastewater treatment. However, there is Ca in natural water. 2+ Mg 2+ , Fe 3+ The same metal ions, but more Fe 3+ The iron salt coagulant used in the pretreatment of tap water, the corrosion of water treatment equipment and pipelines, etc., may cause the ion exchange resin to be affected by Fe during use. 3+ The contamination of Fe leads to the decrease of the working exchange capacity of the resin and affects the water quality. This phenomenon is usually called iron poisoning. At present, the common methods for regenerating resins are hydrochloric acid regeneration, NaCl regeneration and reduction regeneration. Although these methods can achieve certain regeneration effects, due to Fe 3+ The binding ability with cation exchange resin is strong, so the conventional regeneration method has problems such as poor regeneration effect, long regeneration cycle and excessive reagent dosage in the regeneration process of iron poisoning resin. Therefore, it is necessary to find an economical and simple method for regenerating iron poisoning resin with good regeneration performance.

[0003] Disodium EDTA (Na 2 -EDTA) is a common regeneration agent that can efficiently desorb heavy metal ions captured by adsorbents (such as ion exchange resins, biochar, etc.). The principle is based on the fact that in the octahedral coordination field formed by HM-EDTA and Fe(III)-EDTA in the coordination field theory, Fe(III)-EDTA has a larger absolute value of crystal field stabilization energy than HM-EDTA, which makes Fe(III)-EDTA have a larger complex stability constant than HM-EDTA. Therefore, the heavy metal ions adsorbed in the ion exchange resin can be successfully decomplexed and released into the solution. However, this method often requires the addition of a large amount of chemical reagents during actual use, which increases costs and may cause secondary pollution to the environment.

[0004] Electroplating wastewater is listed as one of the three major pollutants in the world. In the electroplating process, in order to increase the conductivity of the plating solution and improve the efficiency of electroplating, a large amount of organic chelating agents (such as ethylenediaminetetraacetic acid, citric acid, pyrophosphoric acid, etc.) are often added. These organic chelating agents form stable heavy metal complexes with heavy metal ions, which also makes the composition of electroplating wastewater more complex and difficult to treat. As a common method for removing heavy metal complexes, the displacement-precipitation method uses Fe 3+ The complex stability constants with a variety of common organic ligands are higher than those of some other common metals. From a thermodynamic point of view, Fe 3+ It can effectively replace the heavy metal ions in the heavy metal complex to form an iron complex, and then remove the free heavy metal ions released into the solution by adding a precipitant or adjusting the pH to alkaline conditions. However, in practical applications, there are still problems such as the generation of a large amount of iron sludge and the difficulty in recovering metal resources. Summary of the invention

[0005] The invention provides a device and method for regenerating iron-poisoned resin and synchronously treating electroplating wastewater.

[0006] The present invention first passes the iron-poisoned resin into a spray cleaning tower for impurity removal treatment to rinse and dissolve organic or inorganic impurities on the surface of the iron-poisoned resin. The impurity wastewater generated by the impurity removal treatment is physically filtered and purified through a grid to remove inorganic impurities in the impurity wastewater. The purified water is re-passed into the spray cleaning tower and circulated for impurity removal treatment of the iron-poisoned resin. The iron-poisoned resin after impurity removal treatment is passed into a pretreatment device and circulated into a pretreatment liquid in a pretreatment liquid storage tank to dissolve iron oxides or iron hydroxides deposited on the surface or in the pores of the iron-poisoned resin into iron ions to obtain a pretreated resin. The pretreated resin is passed into a resin regeneration-electroplating wastewater synchronous treatment device, and the electroplating wastewater is filtered and impurities removed by a filter device and then passed into a resin regeneration-electroplating wastewater synchronous treatment device. Through metal replacement and ion exchange, the removal of heavy metal complexes in the electroplating wastewater and the desorption of iron ions in the resin are achieved. On the one hand, the iron-complex wastewater produced in the resin regeneration-electroplating wastewater simultaneous treatment device is passed into the iron-containing tailwater treatment device, and the iron complex is removed by electrostatic attraction and surface complexation. On the other hand, the resin that desorbs iron ions and adsorbs heavy metal ions produced in the resin regeneration-electroplating wastewater simultaneous treatment device enters the resin regeneration tank, undergoes ion exchange with the sodium chloride solution, desorbs heavy metal ions, and is converted into Na-type or K-type resin. The regenerated liquid and the regenerated resin enter the solid-liquid separation tank for solid-liquid separation, the solid is passed into the regenerated resin storage tank for storing the successfully regenerated resin, and the liquid is passed into the heavy metal resource recovery device, and the heavy metal ions released by ion exchange are recovered by adjusting the pH or adding a precipitant.

[0007] The technical solution of the present invention is as follows:

[0008] The device for regenerating iron-poisoned resin and synchronously treating electroplating wastewater comprises an iron-poisoned resin storage tank 1, a spray cleaning tower 2, a No. 1 water delivery pump 3, a screen 4, a No. 2 water delivery pump 5, a pretreatment device 6, a resin regeneration-electroplating wastewater synchronous treatment device 7, a pretreatment liquid storage tank 8, an electroplating wastewater storage tank 9, a filtering device 10, a No. 3 water delivery pump 11, a No. 4 water delivery pump 12, an iron-containing tail water treatment device 13, and a resin regeneration device 14; the iron-poisoned resin storage tank 1 is connected to the spray cleaning tower 2, the water outlet of the spray cleaning tower 2 is connected to the screen 4 via the No. 1 water delivery pump 3, and the water outlet of the screen 4 is connected to the No. 2 water delivery pump 5. , connected to the water inlet of the spray cleaning tower 2, the discharge port of the spray cleaning tower 2 is connected to the pretreatment device 6, the discharge port of the pretreatment device 6 is connected to the resin regeneration-electroplating wastewater synchronous treatment device 7, the pretreatment liquid storage tank 8 is connected to the pretreatment device 6, the electroplating wastewater storage tank 9 is connected to the filtering device 10, the filtering device 10 is connected to the water inlet of the resin regeneration-electroplating wastewater synchronous treatment device 7 through the No. 3 water delivery pump 11, the water outlet of the resin regeneration-electroplating wastewater synchronous treatment device 7 is connected to the iron-containing tail water treatment device 13 through the No. 4 water delivery pump 12, and the discharge port of the resin regeneration-electroplating wastewater synchronous treatment device 7 is connected to the resin regeneration device 14.

[0009] Furthermore, the resin regeneration-electroplating wastewater simultaneous treatment device 7 includes an electroplating wastewater inlet device 71, a pretreatment iron-poisoned resin inlet 72, a No. 1 packing column 73, a No. 2 packing column 74, an iron-containing tail water outlet 75, a No. 1 packing column outlet 76, and a No. 2 packing column outlet 77; the electroplating wastewater inlet device 71 is connected to the No. 1 packing column 73, the pretreatment iron-poisoned resin inlet 72 is connected to the No. 1 packing column 73 and the No. 2 packing column 74, the bottoms of the No. 1 packing column 73 and the No. 2 packing column 74 are connected, the No. 2 packing column 74 is connected to the iron-containing tail water outlet 75, the No. 1 packing column outlet 76 is connected to the No. 1 packing column 73, and the No. 2 packing column outlet 77 is connected to the No. 2 packing column 74.

[0010] Furthermore, the electroplating wastewater inlet device 71 includes an electroplating wastewater inlet 711, an electroplating wastewater inlet pipe 712, and an electroplating wastewater spray head 713. The pretreatment iron poisoning resin feed port 72 includes an upper layer feed port 721 of a packing column, a lower layer feed port 722 of a packing column, an upper layer feed port 723 of a packing column, and a lower layer feed port 724 of a packing column. The packing column 73 includes an upper layer feed port 721 of a packing column, a lower layer feed port 722 of a packing column, an upper layer feed port 723 of a packing column, and a lower layer feed port 724 of a packing column. The packing column 731 and the first lower packing column 732 are provided. The second packing column 74 includes the second upper packing column 741 and the second lower packing column 742. The iron-containing tailwater outlet 75 includes an outlet pipe 751, an outlet 752, and a check valve 753. The first packing column outlet 76 includes a first outlet pipe 761, a first outlet 762, and a first check valve 763. The second packing column outlet 77 The electroplating wastewater inlet 711 is connected to the electroplating wastewater inlet pipe 712, and the electroplating wastewater inlet pipe 712 is connected to the electroplating wastewater spray head 713. The upper layer feed port 721 of the No. 1 packing column is connected to the upper layer packing column 731, the lower layer feed port 722 of the No. 1 packing column is connected to the lower layer packing column 732, and the upper layer feed port 721 of the No. 1 packing column is connected to the lower layer packing column 732. The layer feed inlet 723 is connected to the No. 2 upper layer packing column 741, the No. 2 packing column lower layer feed inlet 724 is connected to the No. 2 lower layer packing column 742, the water outlet pipe 751 is connected to the water outlet 752 and is provided with a check valve 753, the No. 1 discharge pipe 761 is connected to the No. 1 discharge port 762 and is provided with a No. 1 check valve 763, and the No. 2 discharge pipe 771 is connected to the No. 2 discharge port 772 and is provided with a No. 2 check valve 773.

[0011] Furthermore, the spray cleaning tower 2 includes an iron-poisoned resin feed port 21, a resin conveying pipe 22, an iron-poisoned resin filling device 23, a deionized water spray device 24, a discharge port 25 and a water outlet 26; the iron-poisoned resin feed port 21 is fixedly connected to the resin conveying pipe 22, the resin conveying pipe 22 is fixedly connected to the top of the iron-poisoned resin filling device 23, the discharge port 25 is located at the bottom of the iron-poisoned resin filling device 23, the deionized water spray device 24 is located at the top of the spray cleaning tower 2, and the water outlet 26 is located at the bottom of the spray cleaning tower 2.

[0012] Furthermore, the iron-poisoned resin feed port 21 includes an upper layer iron-poisoned resin feed port 211 and a lower layer iron-poisoned resin feed port 212, the resin delivery pipe 22 includes an upper layer resin delivery pipe 221 and a lower layer resin delivery pipe 222, the iron-poisoned resin filling device 23 includes an upper layer iron-poisoned resin filling device 231 and a lower layer iron-poisoned resin filling device 232, the deionized water spraying device 24 includes a deionized water inlet 241 and a spray head 242, the discharge port 25 includes an upper layer discharge port 251 and a lower layer discharge port 252, and the water outlet 26 includes a water outlet pipe 261 and a check valve 262; the upper layer feed port 211 and the lower layer feed port 212 of the iron poisoning resin are respectively connected to the upper layer iron poisoning resin filling device 231 and the lower layer iron poisoning resin filling device 232 via the upper layer resin conveying pipe 221 and the lower layer resin conveying pipe 222, the deionized water inlet 241 is connected to the spray head 242, the upper layer discharge port 251 and the lower layer discharge port 252 are respectively located at the bottom of the upper layer iron poisoning resin filling device 231 and the lower layer iron poisoning resin filling device 232, and a check valve 262 is provided on the outlet pipe 261.

[0013] Furthermore, the resin regeneration device 14 includes a resin regeneration tank 141, a solid-liquid separation tank 142, a regenerated resin storage tank 143 and a heavy metal resource recovery device 144; one end of the resin regeneration tank 141 is connected to the resin regeneration-electroplating wastewater synchronous treatment device 7, the discharge port is connected to the feed port of the resin regeneration tank 141, the discharge port of the resin regeneration tank 141 is connected to the feed port of the solid-liquid separation tank 142, the solid discharge port of the solid-liquid separation tank 142 is connected to the regenerated resin storage tank 143, and the liquid discharge port of the solid-liquid separation tank 142 is connected to the heavy metal resource recovery device 144.

[0014] The method for regenerating iron-poisoned resin and simultaneously treating electroplating wastewater adopts the above-mentioned device and comprises the following steps:

[0015] S1: The iron-poisoned resin in the iron-poisoned resin storage tank 1 is transported to the spray cleaning tower 2 for impurity removal;

[0016] S2: The water from the spray cleaning tower 2 is passed through the No. 1 water delivery pump 3 into the screen 4 to physically filter the solid impurities in the water, and then pumped into the spray cleaning tower 2 through the No. 2 water delivery pump 5 for recycling;

[0017] S3: The iron-poisoned resin after impurity removal treatment enters the pretreatment device 6 through the discharge port of the spray cleaning tower 2, and the pretreatment liquid in the pretreatment liquid storage tank 8 is circulated and pumped into the pretreatment device 6 for pretreatment to convert the iron oxide or iron hydroxide on the resin surface or in the pores into iron ions;

[0018] S4: the pretreated iron-poisoned resin enters the resin regeneration-electroplating wastewater simultaneous treatment device 7 through the discharge port of the pretreatment device 6;

[0019] S5: After the electroplating wastewater in the electroplating wastewater storage tank 9 is filtered and impurities are removed by the filtering device 10, it is passed into the resin regeneration-electroplating wastewater synchronous treatment device 7 through the No. 3 water delivery pump 11, and the electroplating wastewater is treated by metal replacement and the iron ions in the iron-poisoned resin are desorbed;

[0020] S6: The iron-complex wastewater generated by the resin regeneration-electroplating wastewater synchronous treatment device 7 is transported to the iron-containing tailwater treatment device 13 via the No. 4 water delivery pump 12, and the iron complex is removed by electrostatic attraction and / or surface complexation;

[0021] S7: Resin regeneration - The resin that desorbs iron ions and adsorbs heavy metal ions produced by the electroplating wastewater simultaneous treatment device 7 enters the resin regeneration tank 141 of the resin regeneration device 14, and undergoes ion exchange with the chloride solution to achieve desorption of heavy metal ions and regeneration of the resin. The regenerated liquid and the regenerated resin enter the solid-liquid separation tank 142. After solid-liquid separation, the solid is passed into the regenerated resin storage tank 143, and the liquid is passed into the heavy metal resource recovery device 144. The heavy metal ions released by the ion exchange are recovered by adjusting the pH or adding a precipitant.

[0022] Furthermore, the method for regenerating the iron-poisoned resin and simultaneously treating electroplating wastewater comprises the following steps:

[0023] S1: The iron-poisoned resin in the iron-poisoned resin storage tank 1 is transported to the spray cleaning tower 2, and the organic or inorganic impurities on the surface of the iron-poisoned resin are washed or dissolved by spraying water to achieve impurity removal of the iron-poisoned resin;

[0024] S2: The spray water used in the spray cleaning tower 2 is passed through the outlet by the No. 1 water delivery pump 3 into the grille 4 for physical filtration of solid impurities in the spray water, and then the outlet water is passed through the No. 2 water delivery pump 5 into the spray cleaning tower 2 to realize the recycling of the spray water;

[0025] S3: The iron-poisoned resin after impurity removal treatment enters the pretreatment device 6 through the discharge port of the spray cleaning tower 2, and the pretreatment liquid in the pretreatment liquid storage tank 8 is circulated and pumped into the pretreatment device 6 to pretreat the iron-poisoned resin after impurity removal, dissolving the iron oxides or iron hydroxides deposited on the resin surface or in the pores into iron ions;

[0026] S4: The pretreated iron-poisoned resin enters the packing column of the resin regeneration-electroplating wastewater simultaneous treatment device 7 through the discharge port of the pretreatment device 6;

[0027] S5: After the electroplating wastewater in the electroplating wastewater storage tank 9 is filtered and impurities are removed by the filtering device 10, it is pumped into the resin regeneration-electroplating wastewater synchronous treatment device 7 by the No. 3 water delivery pump 11, and after spraying, it passes through the No. 1 packing column from top to bottom, and then passes through the No. 2 packing column from bottom to top, thereby reducing the pressure in the device while increasing the contact area and contact time between the electroplating wastewater and the packing, and desorbing the iron ions in the resin while treating the electroplating wastewater through the metal replacement effect;

[0028] S6: The iron-complex wastewater generated by the resin regeneration-electroplating wastewater synchronous treatment device 7 is transported from the outlet to the iron-containing tailwater treatment device 13 via the No. 4 water delivery pump 12, and the iron complex is removed by the electrostatic attraction and / or surface complexation of the adsorbent;

[0029] S7: Resin regeneration - The resin for desorbing iron ions and adsorbing heavy metal ions produced by the electroplating wastewater simultaneous treatment device 7 enters the resin regeneration tank 141 of the resin regeneration device 14 from the discharge port, undergoes ion exchange with the chloride solution, and realizes the desorption of adsorbed heavy metal ions and the regeneration of the resin. The regenerated liquid and the regenerated resin enter the solid-liquid separation tank 142. After solid-liquid separation, the solid is passed into the regenerated resin storage tank 143, and the liquid is passed into the heavy metal resource recovery device 144. The heavy metal ions released by the ion exchange are recovered by adjusting the pH or adding a precipitant.

[0030] Furthermore, in S3, the pretreatment liquid is a hydrochloric acid solution with a mass concentration of 10-30 wt%.

[0031] Furthermore, in S6, the adsorbent includes but is not limited to activated carbon, anion exchange resin, orange peel, biochar, etc.

[0032] Furthermore, in S7, the chloride salt solution is a potassium chloride solution or a sodium chloride solution.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] (1) Since most heavy metal ions (HM) can form octahedral structures with ethylenediaminetetraacetic acid (EDTA), shorter bond lengths generally indicate better affinity. Studies have shown that in the octahedral structure formed, heavy metal ions (such as Cu 2+ 、Ni 2+ The bond length between the coordinated O or N (HM-O bond, HM-N bond) is longer than the bond length between the corresponding O or N and Fe 3 +The bond length between the coordination (Fe-O, Fe-N) also makes Fe(III)-EDTA more stable in structure than Ni(II)-EDTA and Cu(II)-EDTA. Theoretically, the electrons provided by the EDTA ligand can occupy the d orbital and p orbital of HM and Fe(III). According to crystal field theory, in the octahedral coordination field, the d orbital of the central ion will split. For example, Cu 2+ , whose electronic configuration is , in the octahedral field, the electron filling is .because The presence of electrons in the orbital will produce the Jahn-Teller effect, causing the complex to be distorted, resulting in a relative decrease in its structural stability. When the crystal field stabilization energy (CFSE) is used to judge the stability of the complex, the principle is that the larger the absolute value of CFSE, the more stable the complex. 3+ In the coordination process, electrons preferentially occupy the lower orbital. 3+ The electronic configuration of , in the octahedral field, the electron filling is , the energy of Fe(III)-EDTA is reduced more, and its electronic configuration is relatively more stable. This makes Fe(III)-EDTA have a larger complex stability constant than HM-EDTA. Therefore, from a thermodynamic point of view, Fe 3+ It can effectively replace the heavy metal ions in the heavy metal complex to form an iron complex. The present invention utilizes the Fe 3+ Heavy metal complexes in electroplating wastewater are treated, and in the pretreatment process, hydrochloric acid solution is used as the pretreatment liquid, which can also be used to adjust the pH value of electroplating wastewater to obtain the best treatment effect. This method avoids the waste of chemical agents, saves costs, and realizes efficient treatment of electroplating wastewater.

[0035] (2) The present invention designs a multi-layer double-filler column in the resin regeneration-electroplating wastewater simultaneous treatment device, which reduces the pressure in the device while increasing the contact area and contact time between the electroplating wastewater and the filler, so that the iron-poisoned resin and the heavy metal complexes in the electroplating wastewater can fully react, thereby achieving efficient removal of the electroplating wastewater and desorption of iron ions in the resin and simultaneous recovery of heavy metal ions.

[0036] (3) The present invention designs an iron-containing tail water treatment device for the iron-containing waste water generated by the resin regeneration and electroplating waste water simultaneous treatment device, and utilizes the electrostatic adsorption and surface complexation of the adsorbent filled in the iron-containing tail water treatment device to ultimately achieve the discharge of electroplating waste water that meets the standards.

[0037] (4) The method of the present invention can continuously realize the regeneration of iron-poisoned resin and the simultaneous treatment of electroplating wastewater, and has a significant treatment effect on heavy metal citric acid complexes. For example, the regeneration rate of iron-poisoned resin with an iron content of 4% is >90%, and the heavy metal recovery rate of electroplating wastewater with a heavy metal content of 10 ppm is >90%. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of a device for regenerating iron-poisoned resin and simultaneously treating electroplating wastewater, in which: an iron-poisoned resin storage tank 1, a spray cleaning tower 2, a No. 1 water delivery pump 3, a grille 4, a No. 2 water delivery pump 5, a pretreatment device 6, a resin regeneration-electroplating wastewater simultaneous treatment device 7, a pretreatment liquid storage tank 8, an electroplating wastewater storage tank 9, a filtering device 10, a No. 3 water delivery pump 11, a No. 4 water delivery pump 12, an iron-containing tail water treatment device 13, and a resin regeneration device 14;

[0039] Figure 2 It is a structural schematic diagram of a resin regeneration-electroplating wastewater synchronous treatment device, in which: an electroplating wastewater inlet device 71, a pre-treatment iron poisoning resin inlet 72, a No. 1 packing column 73, a No. 2 packing column 74, an iron-containing tail water outlet 75, a No. 1 packing column outlet 76, and a No. 2 packing column outlet 77;

[0040] Figure 3 7 is a schematic diagram of the structural details of the resin regeneration-electroplating wastewater synchronous treatment device, in which: an electroplating wastewater inlet 711, an electroplating wastewater inlet pipe 712, an electroplating wastewater spray head 713, an upper feed port 721 of a packing column No. 1, a lower feed port 722 of a packing column No. 1, an upper feed port 723 of a packing column No. 2, a lower feed port 724 of a packing column No. 2, an upper packing column No. 1 731, a lower packing column No. 1 732, an upper packing column No. 2 741, a lower packing column No. 2 742, an outlet pipe 751, an outlet 752, a check valve 753, a discharge pipe No. 1 761, a discharge port No. 1 762, a check valve No. 1 763, a discharge pipe No. 2 771, a discharge port No. 2 772, and a check valve No. 2 773;

[0041] Figure 4 2 is a schematic diagram of the structure of a spray cleaning tower, in which: an iron-poisoned resin feed port 21, a resin delivery pipeline 22, an iron-poisoned resin filler device 23, a deionized water spray device 24, a discharge port 25 and a water outlet 26;

[0042] Figure 52 is a schematic diagram of the structural details of the spray cleaning tower, in which: an upper layer iron poisoning resin feed port 211, a lower layer iron poisoning resin feed port 212, an upper layer resin delivery pipe 221, a lower layer resin delivery pipe 222, an upper layer iron poisoning resin filling device 231, a lower layer iron poisoning resin filling device 232, a deionized water inlet 241, a spray head 242, an upper layer discharge port 251, a lower layer discharge port 252, a water outlet pipe 261, and a check valve 262;

[0043] Figure 6 It is a schematic diagram of the structure of a resin regeneration device, in which: a resin regeneration tank 141, a solid-liquid separation tank 142, a regenerated resin storage tank 143 and a heavy metal resource recovery device 144. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] like Figure 1 As shown, the device for regenerating iron-poisoned resin and synchronously treating electroplating wastewater of the present invention comprises an iron-poisoned resin storage tank 1, a spray cleaning tower 2, a No. 1 water delivery pump 3, a grille 4, a No. 2 water delivery pump 5, a pretreatment device 6, a resin regeneration-electroplating wastewater synchronous treatment device 7, a pretreatment liquid storage tank 8, an electroplating wastewater storage tank 9, a filtering device 10, a No. 3 water delivery pump 11, a No. 4 water delivery pump 12, an iron-containing tail water treatment device 13, and a resin regeneration device 14; the iron-poisoned resin storage tank 1 is connected to the spray cleaning tower 2, the outlet of the spray cleaning tower 2 is connected to the grille 4 via the No. 1 water delivery pump 3, and the outlet of the grille 4 is connected to the No. 2 water delivery pump 3. The delivery pump 5 is connected to the water inlet of the spray cleaning tower 2, the discharge port of the spray cleaning tower 2 is connected to the pretreatment device 6, the discharge port of the pretreatment device 6 is connected to the resin regeneration-electroplating wastewater synchronous treatment device 7, the pretreatment liquid storage tank 8 is connected to the pretreatment device 6, the electroplating wastewater storage tank 9 is connected to the filtering device 10, the filtering device 10 is connected to the water inlet of the resin regeneration-electroplating wastewater synchronous treatment device 7 via the No. 3 water delivery pump 11, the water outlet of the resin regeneration-electroplating wastewater synchronous treatment device 7 is connected to the iron-containing tail water treatment device 13 via the No. 4 water delivery pump 12, and the discharge port of the resin regeneration-electroplating wastewater synchronous treatment device 7 is connected to the resin regeneration device 14.

[0046] like Figure 2As shown, the resin regeneration-electroplating wastewater simultaneous treatment device 7 includes an electroplating wastewater inlet device 71, a pretreatment iron-poisoned resin inlet 72, a No. 1 packing column 73, a No. 2 packing column 74, an iron-containing tail water outlet 75, a No. 1 packing column outlet 76, and a No. 2 packing column outlet 77; the electroplating wastewater inlet device 71 is connected to the No. 1 packing column 73, the pretreatment iron-poisoned resin inlet 72 is connected to the No. 1 packing column 73 and the No. 2 packing column 74, the bottoms of the No. 1 packing column 73 and the No. 2 packing column 74 are connected, the No. 2 packing column 74 is connected to the iron-containing tail water outlet 75, the No. 1 packing column outlet 76 is connected to the No. 1 packing column 73, and the No. 2 packing column outlet 77 is connected to the No. 2 packing column 74.

[0047] like Figure 3 As shown, the electroplating wastewater inlet device 71 includes an electroplating wastewater inlet 711, an electroplating wastewater inlet pipe 712, and an electroplating wastewater spray head 713. The pretreatment iron poisoning resin feed port 72 includes an upper layer feed port 721 of a packing column, a lower layer feed port 722 of a packing column, an upper layer feed port 723 of a packing column, and a lower layer feed port 724 of a packing column. The No. 1 packing column 73 includes an upper layer packing column 721, a lower layer packing column 722, an upper layer packing column 723, and a lower layer packing column 724. The packing column 731, the first lower packing column 732, the second packing column 74 includes the second upper packing column 741, the second lower packing column 742, the iron-containing tail water outlet 75 includes an outlet pipe 751, an outlet 752, and a check valve 753, the first packing column outlet 76 includes a first outlet pipe 761, a first outlet 762, and a first check valve 763, and the second packing column outlet 77 includes a The electroplating wastewater inlet 711 is connected to the electroplating wastewater inlet pipe 712, and the electroplating wastewater inlet pipe 712 is connected to the electroplating wastewater spray head 713. The upper layer feed port 721 of the No. 1 packing column is connected to the upper layer packing column 731, the lower layer feed port 722 of the No. 1 packing column is connected to the lower layer packing column 732, and the upper layer feed port 721 of the No. 1 packing column is connected to the lower layer packing column 732. The feed port 723 is connected to the No. 2 upper packing column 741, the No. 2 packing column lower layer feed port 724 is connected to the No. 2 lower packing column 742, the water outlet pipe 751 is connected to the water outlet 752 and is provided with a check valve 753, the No. 1 discharge pipe 761 is connected to the No. 1 discharge port 762 and is provided with a No. 1 check valve 763, and the No. 2 discharge pipe 771 is connected to the No. 2 discharge port 772 and is provided with a No. 2 check valve 773.

[0048] like Figure 4As shown, the spray cleaning tower 2 includes an iron-poisoned resin feed port 21, a resin conveying pipeline 22, an iron-poisoned resin filling device 23, a deionized water spray device 24, a discharge port 25 and a water outlet 26; the iron-poisoned resin feed port 21 is fixedly connected to the resin conveying pipeline 22, the resin conveying pipeline 22 is fixedly connected to the top of the iron-poisoned resin filling device 23, the discharge port 25 is located at the bottom of the iron-poisoned resin filling device 23, the deionized water spray device 24 is located at the top of the spray cleaning tower 2, and the water outlet 26 is located at the bottom of the spray cleaning tower 2.

[0049] like Figure 5 As shown, the iron-poisoned resin feed port 21 includes an upper layer iron-poisoned resin feed port 211 and a lower layer iron-poisoned resin feed port 212, the resin delivery pipe 22 includes an upper layer resin delivery pipe 221 and a lower layer resin delivery pipe 222, the iron-poisoned resin filling device 23 includes an upper layer iron-poisoned resin filling device 231 and a lower layer iron-poisoned resin filling device 232, the deionized water spraying device 24 includes a deionized water inlet 241 and a spray head 242, the discharge port 25 includes an upper layer discharge port 251 and a lower layer discharge port 252, and the water outlet 26 includes a water outlet pipe 2 61 and a check valve 262; the upper layer feed port 211 and the lower layer feed port 212 of the iron poisoning resin are connected to the upper layer iron poisoning resin filling device 231 and the lower layer iron poisoning resin filling device 232 respectively through the upper layer resin conveying pipe 221 and the lower layer resin conveying pipe 222, the deionized water inlet 241 is connected to the spray head 242, the upper layer discharge port 251 and the lower layer discharge port 252 are respectively located at the bottom of the upper layer iron poisoning resin filling device 231 and the lower layer iron poisoning resin filling device 232, and a check valve 262 is provided on the outlet pipe 261.

[0050] like Figure 6 As shown, the resin regeneration device 14 includes a resin regeneration tank 141, a solid-liquid separation tank 142, a regenerated resin storage tank 143 and a heavy metal resource recovery device 144; one end of the resin regeneration tank 141 is connected to the resin regeneration-electroplating wastewater synchronous treatment device 7, the discharge port is connected to the feed port of the resin regeneration tank 141, the discharge port of the resin regeneration tank 141 is connected to the feed port of the solid-liquid separation tank 142, the solid discharge port of the solid-liquid separation tank 142 is connected to the regenerated resin storage tank 143, and the liquid discharge port of the solid-liquid separation tank 142 is connected to the heavy metal resource recovery device 144.

[0051] The method for regenerating the iron-poisoned resin and simultaneously treating electroplating wastewater of the present invention adopts the above-mentioned device and comprises the following steps:

[0052] S1: The iron-poisoned resin in the iron-poisoned resin storage tank 1 is transported to the spray cleaning tower 2 for impurity removal;

[0053] S2: The water from the spray cleaning tower 2 is passed through the No. 1 water delivery pump 3 into the screen 4 to physically filter the solid impurities in the water, and then pumped into the spray cleaning tower 2 through the No. 2 water delivery pump 5 for recycling;

[0054] S3: The iron-poisoned resin after impurity removal treatment enters the pretreatment device 6 through the discharge port of the spray cleaning tower 2, and the pretreatment liquid in the pretreatment liquid storage tank 8 is circulated and pumped into the pretreatment device 6 for pretreatment to convert the iron oxide or iron hydroxide on the resin surface or in the pores into iron ions;

[0055] S4: the pretreated iron-poisoned resin enters the resin regeneration-electroplating wastewater simultaneous treatment device 7 through the discharge port of the pretreatment device 6;

[0056] S5: After the electroplating wastewater in the electroplating wastewater storage tank 9 is filtered and impurities are removed by the filtering device 10, it is passed into the resin regeneration-electroplating wastewater synchronous treatment device 7 through the No. 3 water delivery pump 11, and the electroplating wastewater is treated by metal replacement and the iron ions in the iron-poisoned resin are desorbed;

[0057] S6: The iron-complex wastewater generated by the resin regeneration-electroplating wastewater synchronous treatment device 7 is transported to the iron-containing tailwater treatment device 13 via the No. 4 water delivery pump 12, and the iron complex is removed by electrostatic attraction and / or surface complexation;

[0058] S7: Resin regeneration - The resin that desorbs iron ions and adsorbs heavy metal ions produced by the electroplating wastewater simultaneous treatment device 7 enters the resin regeneration tank 141 of the resin regeneration device 14, undergoes ion exchange with the chloride solution to achieve the desorption of heavy metal ions and regeneration of the resin, and the regenerated liquid and the regenerated resin enter the solid-liquid separation tank 142. After solid-liquid separation, the solid is passed into the regenerated resin storage tank 143, and the liquid is passed into the heavy metal resource recovery device 144.

[0059] More specifically, the method for regenerating the iron-poisoned resin and simultaneously treating electroplating wastewater comprises the following steps:

[0060] S1: The iron-poisoned resin in the iron-poisoned resin storage tank 1 is transported to the spray cleaning tower 2, and the organic or inorganic impurities on the surface of the iron-poisoned resin are washed or dissolved by spraying water to achieve impurity removal of the iron-poisoned resin;

[0061] S2: The spray water used in the spray cleaning tower 2 is passed through the outlet by the No. 1 water delivery pump 3 into the grille 4 for physical filtration of solid impurities in the spray water, and then the outlet water is passed through the No. 2 water delivery pump 5 into the spray cleaning tower 2 to realize the recycling of the spray water;

[0062] S3: The iron-poisoned resin after impurity removal treatment enters the pretreatment device 6 through the discharge port of the spray cleaning tower 2, and the pretreatment liquid in the pretreatment liquid storage tank 8 is circulated and pumped into the pretreatment device 6 to pretreat the iron-poisoned resin after impurity removal, dissolving the iron oxides or iron hydroxides deposited on the resin surface or in the pores into iron ions;

[0063] S4: The pretreated iron-poisoned resin enters the packing column of the resin regeneration-electroplating wastewater simultaneous treatment device 7 through the discharge port of the pretreatment device 6;

[0064] S5: After the electroplating wastewater in the electroplating wastewater storage tank 9 is filtered and impurities are removed by the filtering device 10, it is pumped into the resin regeneration-electroplating wastewater synchronous treatment device 7 by the No. 3 water delivery pump 11, and after spraying, it passes through the No. 1 packing column from top to bottom, and then passes through the No. 2 packing column from bottom to top, thereby reducing the pressure in the device while increasing the contact area and contact time between the electroplating wastewater and the packing, and desorbing the iron ions in the iron-poisoned resin while treating the electroplating wastewater through the metal replacement effect;

[0065] S6: The iron-complex wastewater generated by the resin regeneration-electroplating wastewater synchronous treatment device 7 is transported to the iron-containing tailwater treatment device 13 via the No. 4 water delivery pump 12, and the iron complex is removed by the electrostatic attraction and / or surface complexation of the adsorbent;

[0066] S7: Resin regeneration - The resin for desorbing iron ions and adsorbing heavy metal ions produced by the simultaneous treatment device for electroplating wastewater 7 enters the resin regeneration tank 141 of the resin regeneration device 14, undergoes ion exchange with the sodium chloride solution, and realizes the desorption of adsorbed heavy metal ions and the regeneration of the resin. The regenerated liquid and the regenerated resin enter the solid-liquid separation tank 142. After solid-liquid separation, the solid is passed into the regenerated resin storage tank 143, and the liquid is passed into the heavy metal resource recovery device 144.

[0067] Example 1

[0068] The method for regenerating iron-poisoned resin and simultaneously treating electroplating wastewater comprises the following steps:

[0069] S1: The iron-poisoned resin in the iron-poisoned resin storage tank 1 is transported to the upper iron-poisoned resin packing device 231 and the lower iron-poisoned resin packing device 232 in the spray cleaning tower 2 through the upper iron-poisoned resin feed port 211 and the lower iron-poisoned resin feed port 212 by the upper resin delivery pipe 221 and the lower resin delivery pipe 222, and deionized water is sprayed from the spray head 242 through the deionized water inlet 241 to wash or dissolve the organic or inorganic impurities on the surface of the iron-poisoned resin, so as to remove impurities from the iron-poisoned resin;

[0070] S2: Open the check valve 262, and the outlet water in the spray cleaning tower 2 is passed through the outlet pipe 261 by the No. 1 water delivery pump 3 into the grille 4 for physically filtering solid impurities in the water. Then the outlet water is recycled to the spray cleaning tower 2 through the No. 2 water delivery pump 5 and the deionized water inlet 241, so as to realize the recycling of deionized water;

[0071] S3: The iron-poisoned resin after impurity removal treatment enters the pretreatment device 6 through the upper discharge port 251 and the lower discharge port 252 of the spray cleaning tower 2, and the pretreatment liquid in the pretreatment liquid storage tank 8 is circulated and pumped into the pretreatment device 6 to pretreat the iron-poisoned resin after impurity removal, dissolving the iron oxides or iron hydroxides deposited on the resin surface or in the pores into iron ions;

[0072] S4: The pretreated iron-poisoned resin enters the No. 1 upper packing column 731, No. 1 lower packing column 732, No. 2 upper packing column 741, and No. 2 lower packing column 742 of the resin regeneration-electroplating wastewater synchronous treatment device 7 through the discharge port of the pretreatment device 6 through the No. 1 packing column upper layer feed port 721, the No. 1 packing column lower layer feed port 722, the No. 2 packing column upper layer feed port 723, and the No. 2 packing column lower layer feed port 724;

[0073] S5: After the electroplating wastewater in the electroplating wastewater storage tank 9 is filtered and impurities are removed by the filtering device 10, it is sprayed out from the electroplating wastewater spray head 713 through the electroplating wastewater inlet 711 through the electroplating wastewater inlet pipe 712 through the No. 3 water delivery pump 11, and the electroplating wastewater passes through the No. 1 upper packing column 731 and the No. 1 lower packing column 732 from top to bottom, and then passes through the No. 2 lower packing column 742 and the No. 2 upper packing column 741 from bottom to top, thereby reducing the pressure in the device while increasing the contact area and contact time between the electroplating wastewater and the packing, and desorbing the iron ions in the iron poisoning resin while treating the electroplating wastewater through the metal replacement effect;

[0074] S6: Open the check valve 753, and the iron-containing complex wastewater generated by the resin regeneration-electroplating wastewater synchronous treatment device 7 is transported from the outlet pipe 751 through the outlet 752 and the No. 4 water delivery pump 12 to the iron-containing tail water treatment device 13, and the iron complex is removed by the electrostatic attraction and / or surface complexation of the adsorbent;

[0075] S7: Open the first check valve 763 and the second check valve 773. The resin that desorbs iron ions and adsorbs heavy metal ions generated by the resin regeneration - electroplating wastewater synchronous treatment device 7 enters the resin regeneration tank 141 of the resin regeneration device 14 through the first discharge port 762 and the second discharge port 772, and undergoes an ion exchange reaction with the chloride salt solution to achieve the desorption of heavy metal ions and the regeneration of the resin. The regenerated liquid and the regenerated resin enter the solid - liquid separation tank 142. After solid - liquid separation, the solid is fed into the regenerated resin storage tank 143, and the liquid is fed into the heavy metal resource recovery device 144. The heavy metal ions released by ion exchange are recovered by adjusting the pH or adding a precipitant.

[0076] In this embodiment, the macroporous cation exchange resin D001 containing Fe 3+ (styrene - divinylbenzene copolymer with sulfonic acid groups (-SO 3 H)) is selected as the representative of iron - poisoned resin. The iron - poisoned resins with different iron contents are shown in Table 1.

[0077] Respectively add 0.3 g / L of iron - poisoned resins with different iron contents into the device for the synchronous treatment of the regeneration of iron - poisoned resin and electroplating wastewater of the present invention. Control the water flow rate of the spray water in the spray cleaning tower to be 0.1 L / min, the pretreatment liquid is a 10wt.% hydrochloric acid solution, the chloride salt solution is sodium chloride solution, the iron - removing adsorbent is macroporous cation exchange resin and macroporous anion exchange resin, and the heavy metal ions released by ion exchange are recovered by adjusting the pH. The initial concentration of the electroplating wastewater (calculated as heavy metal ions) is 10 ppm. The electroplating wastewater is a complex wastewater containing citric acid ligands, and the heavy metals are Cu, Ni, Zn, Pb, and Hg respectively. The pretreated resin is loaded into the resin regeneration - electroplating wastewater synchronous treatment device. The initial pH of the electroplating wastewater is about 5.0, the wastewater pumping speed is 0.01 L / min, and the wastewater residence time is 30 min. Collect the tail water treated by the iron - containing tail water treatment device, the tail water treated by the heavy metal resource recovery device, and the regenerated resin, test the contents of different metal elements in the tail water, and calculate the heavy metal removal rate, heavy metal recovery efficiency, and resin regeneration rate. The results are shown in Table 2.

[0078] Table 1

[0079] Iron content in iron-poisoned resin (mass fraction) 2.1328% 4.2107% 8.3598% serial number Iron poisoning resin 1 Iron poisoning resin 2 Iron poisoning resin 3

[0080] Table 2

[0081] Regeneration efficiency of iron poisoned resin 1 (%) Regeneration efficiency of iron poisoned resin 2 (%) Regeneration efficiency of iron-poisoned resin 3 (%) Heavy metal removal rate (%) Heavy metal recovery efficiency (%) Nickel-containing wastewater >95 >90 >85 >99.5 >90 Copper-containing wastewater >95 >90 >85 >99.5 >90 Zinc-containing wastewater >95 >90 >85 >99.5 >90 Lead-containing wastewater >95 >90 >85 >99.5 >90 Mercury-containing wastewater >95 >90 >85 >99.5 >90

[0082] The working principle of the present invention is: firstly, the iron-poisoned resin after impurity removal is pretreated with hydrochloric acid solution to dissolve the iron oxides or iron hydroxides deposited on the surface or in the pores. At this time, the iron in the iron-poisoned resin exists in the form of iron ions. Based on the principle of coordination field theory, Fe(III)-EDTA is more stable in structure than HM-EDTA (such as Ni(II)-EDTA and Cu(II)-EDTA, etc.), which makes Fe(III)-EDTA have a larger complex stability constant than HM-EDTA. Therefore, from a thermodynamic point of view, Fe 3+ It can effectively replace the heavy metal ions in the heavy metal complex to form an iron complex, thereby achieving effective removal of the heavy metal complex in the electroplating wastewater. At this time, the iron in the iron-poisoned resin is released into the solution in the form of a complex, and the resin functional groups are occupied by heavy metal ions. Sodium chloride solution is used as the regeneration solution. Through ion exchange, sodium ions replace the heavy metal ions on the resin functional groups, and the heavy metal ions are released into the solution while the resin is regenerated. At this time, the capture and recovery of heavy metal ions is achieved by using a precipitant or by adjusting the solution to alkalinity. The treated electroplating wastewater is converted into iron-containing complex wastewater, and the iron complex is removed by electrostatic attraction and / or surface complexation of common adsorbents (such as activated carbon, anion exchange resin, orange peel, biochar, etc.), so that the effluent can finally meet the discharge standards.

[0083] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0084] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for regenerating iron-poisoned resin and simultaneously treating electroplating wastewater, characterized in that: The invention comprises an iron-poisoned resin storage tank (1), a spray cleaning tower (2), a first water delivery pump (3), a grille (4), a second water delivery pump (5), a pretreatment device (6), a resin regeneration-electroplating wastewater synchronous treatment device (7), a pretreatment liquid storage tank (8), an electroplating wastewater storage tank (9), a filtering device (10), a third water delivery pump (11), a fourth water delivery pump (12), an iron-containing tail water treatment device (13), and a resin regeneration device (14); the iron-poisoned resin storage tank (1) is connected to the spray cleaning tower (2), the water outlet of the spray cleaning tower (2) is connected to the grille (4) via the first water delivery pump (3), the water outlet of the grille (4) is connected to the spray cleaning tower via the second water delivery pump (5), and the water outlet of the grille (4) is connected to the spray cleaning tower via the second water delivery pump (5). The spray cleaning tower (2) is connected to the water inlet, the discharge port of the spray cleaning tower (2) is connected to the pretreatment device (6), the discharge port of the pretreatment device (6) is connected to the resin regeneration-electroplating wastewater synchronous treatment device (7), the pretreatment liquid storage tank (8) is connected to the pretreatment device (6), the electroplating wastewater storage tank (9) is connected to the filtering device (10), the filtering device (10) is connected to the water inlet of the resin regeneration-electroplating wastewater synchronous treatment device (7) via a No. 3 water delivery pump (11), the water outlet of the resin regeneration-electroplating wastewater synchronous treatment device (7) is connected to the iron-containing tail water treatment device (13) via a No. 4 water delivery pump (12), and the discharge port of the resin regeneration-electroplating wastewater synchronous treatment device (7) is connected to the resin regeneration device (14).

2. The device according to claim 1, characterized in that The resin regeneration-electroplating wastewater synchronous treatment device (7) comprises an electroplating wastewater inlet device (71), a pre-treatment iron poisoning resin feed port (72), a first packing column (73), a second packing column (74), an iron-containing tail water outlet (75), a first packing column discharge port (76), and a second packing column discharge port (77); the electroplating wastewater inlet device (71) is connected to the first packing column (73), the pre-treatment iron poisoning resin feed port (72) is connected to the first packing column (73) and the second packing column (74), the bottoms of the first packing column (73) and the second packing column (74) are connected, the second packing column (74) is connected to the iron-containing tail water outlet (75), the first packing column discharge port (76) is connected to the first packing column (73), and the second packing column discharge port (77) is connected to the second packing column (74).

3. The device according to claim 2, characterized in that The electroplating wastewater inlet device (71) comprises an electroplating wastewater inlet (711), an electroplating wastewater inlet pipe (712), and an electroplating wastewater spray head (713); the pretreatment iron poisoning resin feed port (72) comprises an upper layer feed port (721) of a No. 1 packing column, a lower layer feed port (722) of a No. 1 packing column, an upper layer feed port (723) of a No. 2 packing column, and a lower layer feed port (724) of a No. 2 packing column; the No. 1 packing column (73) comprises an upper layer packing column (731) of a No. 1 packing column. , a No. 1 lower packing column (732), the No. 2 packing column (74) includes a No. 2 upper packing column (741) and a No. 2 lower packing column (742), the iron-containing tailwater outlet (75) includes an outlet pipe (751), an outlet (752), and a check valve (753), the No. 1 packing column discharge port (76) includes a No. 1 discharge pipe (761), a No. 1 discharge port (762), and a No. 1 check valve (763), the No. 2 packing column discharge port (77) includes a No. 2 packing column discharge port (78), and a No. 2 packing column discharge port (79). No. 1 discharge pipe (771), No. 2 discharge port (772), No. 2 check valve (773), the electroplating wastewater inlet (711) is connected to the electroplating wastewater inlet pipe (712), the electroplating wastewater inlet pipe (712) is connected to the electroplating wastewater spray head (713), the No. 1 packing column upper layer feed port (721) is connected to the No. 1 upper layer packing column (731), the No. 1 packing column lower layer feed port (722) is connected to the No. 1 lower layer packing column (732), the No. 2 packing column upper layer feed port (721) is connected to the No. 1 packing column upper layer feed port (722) is connected to the No. 1 packing column lower layer feed port (732), the No. 2 packing column upper layer feed port (721) is connected to the No. 1 packing column lower layer feed port (722) is connected to the No. 1 packing column lower layer feed port (732), the No. 2 packing column upper layer feed port (721) is connected to the No. 1 ... upper layer feed port (731) (723) is connected to the No. 2 upper packing column (741), the lower layer feed port (724) of the No. 2 packing column is connected to the No. 2 lower layer packing column (742), the water outlet pipe (751) is connected to the water outlet (752) and is provided with a check valve (753), the No. 1 discharge pipe (761) is connected to the No. 1 discharge port (762) and is provided with a No. 1 check valve (763), and the No. 2 discharge pipe (771) is connected to the No. 2 discharge port (772) and is provided with a No. 2 check valve (773).

4. The device according to claim 1, characterized in that The spray cleaning tower (2) comprises an iron-poisoned resin feed port (21), a resin delivery pipeline (22), an iron-poisoned resin filling device (23), a deionized water spray device (24), a discharge port (25) and a water outlet (26); the iron-poisoned resin feed port (21) is fixedly connected to the resin delivery pipeline (22), the resin delivery pipeline (22) is fixedly connected to the top of the iron-poisoned resin filling device (23), the discharge port (25) is located at the bottom of the iron-poisoned resin filling device (23), the deionized water spray device (24) is located at the top of the spray cleaning tower (2), and the water outlet (26) is located at the bottom of the spray cleaning tower (2).

5. The device according to claim 1, characterized in that The iron-poisoned resin feed port (21) includes an upper layer iron-poisoned resin feed port (211) and a lower layer iron-poisoned resin feed port (212); the resin delivery pipe (22) includes an upper layer resin delivery pipe (221) and a lower layer resin delivery pipe (222); the iron-poisoned resin filling device (23) includes an upper layer iron-poisoned resin filling device (231) and a lower layer iron-poisoned resin filling device (232); the deionized water spraying device (24) includes a deionized water inlet (241) and a spray head (242); the discharge port (25) includes an upper layer discharge port (251) and a lower layer discharge port (252); the water outlet (26) includes a water outlet pipe (261); and the water outlet (262) includes a water outlet pipe (263). 1) and a check valve (262); the upper layer iron poisoning resin feed port (211) and the lower layer feed port (212) are connected to the upper layer iron poisoning resin filling device (231) and the lower layer iron poisoning resin filling device (232) through the upper layer resin conveying pipe (221) and the lower layer resin conveying pipe (222), respectively; the deionized water inlet (241) is connected to the spray head (242); the upper layer discharge port (251) and the lower layer discharge port (252) are respectively located at the bottom of the upper layer iron poisoning resin filling device (231) and the lower layer iron poisoning resin filling device (232); and the water outlet pipe (261) is provided with a check valve (262).

6. The device according to claim 1, characterized in that The resin regeneration device (14) comprises a resin regeneration tank (141), a solid-liquid separation tank (142), a regenerated resin storage tank (143) and a heavy metal resource recovery device (144); one end of the resin regeneration tank (141) is connected to the resin regeneration-electroplating wastewater synchronous treatment device (7); the discharge port is connected to the feed port of the resin regeneration tank (141); the discharge port of the resin regeneration tank (141) is connected to the feed port of the solid-liquid separation tank (142); the solid discharge port of the solid-liquid separation tank (142) is connected to the regenerated resin storage tank (143); and the liquid discharge port of the solid-liquid separation tank (142) is connected to the heavy metal resource recovery device (144).

7. A method for regenerating iron-poisoned resin and simultaneously treating electroplating wastewater, characterized in that: The device according to any one of claims 1 to 6 comprises the following steps: S1: The iron-poisoned resin in the iron-poisoned resin storage tank (1) is transported to the spray cleaning tower (2) for impurity removal; S2: The water discharged from the spray cleaning tower (2) is passed through the No. 1 water delivery pump (3) into the screen (4), solid impurities in the water are physically filtered, and then pumped into the spray cleaning tower (2) through the No. 2 water delivery pump (5) for recycling; S3: the iron-poisoned resin after impurity removal treatment enters the pretreatment device (6) through the discharge port of the spray cleaning tower (2), and the pretreatment liquid in the pretreatment liquid storage tank (8) is circulated and pumped into the pretreatment device (6) for pretreatment to convert the iron oxide or iron hydroxide on the surface or in the pores of the resin into iron ions; S4: The pretreated iron-poisoned resin enters the resin regeneration-electroplating wastewater simultaneous treatment device (7) through the discharge port of the pretreatment device (6); S5: After the electroplating wastewater in the electroplating wastewater storage tank (9) is filtered and impurities are removed by the filtering device (10), it is passed into the resin regeneration-electroplating wastewater synchronous treatment device (7) through the No. 3 water delivery pump (11), and the electroplating wastewater is treated by metal replacement and the iron ions in the iron-poisoned resin are desorbed; S6: The iron-complex wastewater generated by the resin regeneration-electroplating wastewater simultaneous treatment device (7) is transported to the iron-containing tailwater treatment device (13) via the No. 4 water delivery pump (12), and the iron complex is removed by electrostatic attraction and / or surface complexation; S7: The resin that desorbs iron ions and adsorbs heavy metal ions produced by the resin regeneration-electroplating wastewater simultaneous treatment device (7) enters the resin regeneration tank (141) of the resin regeneration device (14), and undergoes ion exchange with the chloride solution to achieve desorption of heavy metal ions and regeneration of the resin. The regenerated liquid and the regenerated resin enter the solid-liquid separation tank (142). After solid-liquid separation, the solid is passed into the regenerated resin storage tank (143), and the liquid is passed into the heavy metal resource recovery device (144). The heavy metal ions released by the ion exchange are recovered by adjusting the pH or adding a precipitant.

8. The method according to claim 7, characterized in that The following steps are involved: S1: The iron-poisoned resin in the iron-poisoned resin storage tank (1) is transported to the spray cleaning tower (2), and the organic or inorganic impurities on the surface of the iron-poisoned resin are washed or dissolved by spraying water, thereby removing impurities from the iron-poisoned resin; S2: The spray water used in the spray cleaning tower (2) is passed through the water outlet by the No. 1 water delivery pump (3) into the grille (4) for physically filtering solid impurities in the spray water. The outlet water then passes through the No. 2 water delivery pump (5) into the spray cleaning tower (2), thereby realizing the recycling of the spray water. S3: the iron-poisoned resin after impurity removal treatment enters the pretreatment device (6) through the discharge port of the spray cleaning tower (2), and the pretreatment liquid in the pretreatment liquid storage tank (8) is circulated and pumped into the pretreatment device (6) to pretreat the iron-poisoned resin after impurity removal, and dissolve the iron oxides or iron hydroxides deposited on the resin surface or in the pores into iron ions; S4: the pretreated iron-poisoned resin enters the packing column of the resin regeneration-electroplating wastewater simultaneous treatment device (7) through the discharge port of the pretreatment device (6); S5: After the electroplating wastewater in the electroplating wastewater storage tank (9) is filtered and impurities are removed by the filtering device (10), the electroplating wastewater is pumped into the resin regeneration-electroplating wastewater synchronous treatment device (7) through the No. 3 water delivery pump (11), and is sprayed and passed through the No. 1 packing column from top to bottom, and then passed through the No. 2 packing column from bottom to top, thereby reducing the pressure in the device while increasing the contact area and contact time between the electroplating wastewater and the packing, and desorbing the iron ions in the iron-poisoned resin while treating the electroplating wastewater through the metal replacement effect; S6: The iron-complex wastewater generated by the resin regeneration-electroplating wastewater synchronous treatment device (7) is transported from the outlet to the iron-containing tailwater treatment device (13) via the No. 4 water delivery pump (12), and the iron complex is removed by electrostatic attraction and / or surface complexation of the adsorbent; S7: The resin for desorbing iron ions and adsorbing heavy metal ions produced by the resin regeneration-electroplating wastewater simultaneous treatment device (7) enters the resin regeneration tank (141) of the resin regeneration device (14) from the discharge port, undergoes ion exchange with the chloride solution, and achieves desorption of adsorbed heavy metal ions and regeneration of the resin. The regenerated liquid and the regenerated resin enter the solid-liquid separation tank (142). After solid-liquid separation, the solid is passed into the regenerated resin storage tank (143), and the liquid is passed into the heavy metal resource recovery device (144). The heavy metal ions released by the ion exchange are recovered by adjusting the pH or adding a precipitant.

9. The method according to claim 7 or 8, characterized in that In S3, the pretreatment liquid is a hydrochloric acid solution with a mass concentration of (10)~(30) wt%; in S6, the adsorbent is activated carbon, anion exchange resin, orange peel or biochar.

10. The method according to claim 7 or 8, characterized in that: In S7, the chloride salt solution is a potassium chloride solution or a sodium chloride solution.

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