TW201628975A - Recovery system and method for underwater heavy metals - Google Patents

Abstract

A recovery system for heavy metals in water comprises a first heavy metal removal module, a second heavy metal removal module, a heavy metal recovery module, a wastewater tank, and a recovery solution tank. The first heavy metal removal module is connected, via pipelines, respectively to the wastewater tank and the heavy metal recovery module, and the first heavy metal removal module has at least one cation exchange resin and a first drain pipeline. The second heavy metal removal module is connected, via pipelines, to the wastewater tank and the heavy metal recovery module respectively, and the second heavy metal removal module has at least one cation exchange resin and a second drain pipeline. The heavy metal recovery module is connected, via pipelines, to the wastewater tank and the recovery solution tank respectively, and the heavy metal recovery module has at least one cation exchange resin.

Description

Heavy metal recovery system and recovery method in water

The invention relates to a heavy metal recovery system and a recovery method in water, in particular to a method capable of completely combining heavy metals in waste water with a cation exchange resin, and the heavy metal content in the discharged wastewater can be lower than the discharge standard, and a high concentration can be obtained. Recovery system and recovery method for heavy metal recovery liquid.

In the manufacturing process of the printed circuit board and the semiconductor manufacturing industry, a large amount of high-concentration waste liquid containing heavy metals is generated, and if this waste liquid is improperly disposed, it will cause serious environmental pollution. Furthermore, in recent years, due to the rise of environmental awareness, governments have increasingly stricter standards for the discharge of industrial wastewater containing heavy metals. Therefore, how to effectively separate heavy metals from water to ensure that the content of heavy metals in discharged wastewater is lower than the discharge standard is One of the concerns of the industry.

In addition to ensuring that treated wastewater is below emission standards, today's treatment of heavy metal-containing wastewater has moved toward the recovery of heavy metals, which not only solves the problem of industrial wastewater treatment, but also further processes the recovered heavy metals into high-value Rice particles, for the purpose of recycling resources.

Electrolysis is the most common method for recovering heavy metal ions. It uses DC electricity to deposit heavy metal ions in wastewater on the cathode and recover it. However, when the concentration of heavy metal ions in wastewater is too low, the efficiency of electrolytic recovery of heavy metals will be Significantly reduce and increase recycling costs. Therefore, before electrolyzing the wastewater containing heavy metals, the cation exchange resin is first treated to combine the heavy metals in the wastewater with the cation exchange resin, and the treated water can be discharged or recycled after being discharged below the discharge standard; Next, the cation exchange resin is further washed with an anion regenerant to remove heavy metal ions from the cation exchange resin, and the cation exchange resin can be reused, and the separated heavy metal ions are electrolyzed and recovered.

In the conventional heavy metal recovery system 1 shown in FIG. 1, in order to increase the recovery efficiency, the first cation exchange resin 11 and the second cation exchange resin 12 are used to treat the wastewater in turn; the heavy metal-containing wastewater first flows from the wastewater tank 13 into the first cation. The exchange resin 11 is treated so that the heavy metal in the wastewater is first combined with the first cation exchange resin 11, and the treated water is discharged from the drain tank 14, and when the first cation exchange resin 11 is nearly saturated, the waste water tank 13 is The waste water line is switched to the second cation exchange resin 12 to continue the treatment, and at this time, the first cation exchange resin 11 is washed with an anion regenerant to remove the heavy metal from the first cation exchange resin 11, the first cation exchange resin 11 It can be reused, and the separated heavy metal is collected into the recovery liquid tank 15 to be subjected to electrolytic recovery; when the second cation exchange resin 12 is nearly saturated, the waste water line in the wastewater tank 13 is switched to the first cation exchange The resin 11 is further processed, and at this time, the second cation exchange resin 12 is washed with an anion regenerant to make heavy metals From the second cation exchange resin 12, the second cation exchange resin 12 may be reused, while the heavy metals from the collector to the recovery tank 15 is to be subjected to electrolytic recovery.

It can be seen that in the conventional heavy metal recovery system in water, each cation exchange resin is responsible for removing heavy metals in the wastewater, so that the wastewater is lower than the discharge standard, and the separated heavy metals are directly recycled and reused. However, whether the treated wastewater is lower than the discharge standard is related to the adsorption saturation of the cation exchange resin. The closer to saturation, the higher the risk that the treated wastewater cannot be lower than the discharge standard; in order to ensure that the treated wastewater can be lower than the discharge standard, When the cation exchange resin has not reached saturation state, the pipeline is switched, the heavy metal-containing wastewater is stopped, and the regeneration is carried out with an anion regenerant. However, because the cation exchange resin is combined with a low heavy metal content, the concentration of heavy metals in the recovered liquid after the regeneration treatment is stopped. Low, will greatly reduce the efficiency of subsequent electrolytic recovery. Therefore, when to switch the pipeline of the cation exchange resin to ensure that the treated wastewater can be lower than the discharge standard, and the concentration of the recovered heavy metal is not too low, it is a difficult point faced by the heavy metal recovery system in the water, and it is urgent to be Improvements.

In order to solve the above problems, the main object of the present invention is to provide a heavy metal recovery system in water. By adding a heavy metal recovery module, the function of removing heavy metal from the cation exchange resin in the water is separated from the function of recovering heavy metals, and is responsible for removing heavy metals in the water. The cleaning module can be regenerated before the cation exchange resin has reached saturation, to ensure that the heavy metals in the wastewater are completely combined with the cation exchange resin, and the discharged heavy metal content is lower than the emission standard, which is in compliance with regulations and does not cause environmental damage. Pollution.

A second object of the present invention is to provide a heavy metal recovery system in water, which has more than one heavy metal removal module and a heavy metal recovery module, and the heavy metal recovery module can collectively collect heavy metals separated by the heavy metal removal module. When the heavy metal adsorption of the cation exchange resin in the heavy metal recovery module reaches full saturation, the regeneration is performed to obtain a high concentration heavy metal recovery liquid, thereby improving the efficiency of subsequent heavy metal electrolytic recovery.

The first aspect of the invention discloses a heavy metal recovery system for water, comprising: a first heavy metal removal module, a second heavy metal removal module, a heavy metal recovery module, a wastewater tank, and a recovery liquid tank; a heavy metal removal module is respectively connected to the wastewater tank and the heavy metal recovery module by a pipeline, and the first heavy metal removal module has at least one cation exchange resin and a first drainage pipeline; the second heavy metal removal module Separating the wastewater tank and the heavy metal recovery module with a pipeline, and the second heavy metal removal module has at least one cation exchange resin and a second drainage pipeline; and the heavy metal recovery module and the first heavy metal The cleaning module, the second heavy metal removal module, the waste water tank, and the recovery liquid tank are connected by a pipeline, and the heavy metal recovery module has at least one cation exchange resin. [00010] In a preferred embodiment, the underwater heavy metal recovery system further has a drain tank connected to the first heavy metal removal module and the drain tank, and the second drain line system Connecting the second heavy metal removal module to the drain groove. [00011] In a preferred embodiment, a sampling point is disposed on the heavy metal recovery module-wastewater tank line connecting the heavy metal recovery module and the wastewater tank. [0001] The present invention discloses a method for recovering heavy metals in water, comprising: providing a heavy metal recovery system in water as described in claim 1; flowing water from the wastewater tank of the recovery system to the recovery system The first heavy metal removal module is processed to combine the heavy metal in the water with the cation exchange resin in the first heavy metal removal module, and the treated water is discharged from the first drainage pipeline; in the first heavy metal removal module When the cation exchange resin is not saturated, the waste water line in the waste water tank is switched to the second heavy metal removal module of the recovery system for treatment, so that the heavy metal in the water is combined with the cation exchange resin in the second heavy metal removal module. The treated water is discharged from the second drain line; the cation exchange resin in the first heavy metal removal module is washed by an anion regenerant to remove the heavy metal from the cation exchange resin in the first heavy metal removal module, The cation exchange resin in a heavy metal removal module can be reused and the detached heavy metal stream is washed until The heavy metal recovery module combines the detached heavy metal with the cation exchange resin in the heavy metal recovery module; when the cation exchange resin in the second heavy metal removal module is not near saturation, the waste water line in the wastewater tank is switched Processing to the first heavy metal removal module, and washing the cation exchange resin in the second heavy metal removal module with an anionic regenerant to remove heavy metals from the cation exchange resin in the second heavy metal removal module, the second The cation exchange resin in the heavy metal removal module can be reused, and the detached heavy metal is washed to the heavy metal recovery module to combine the detached heavy metal with the cation exchange resin in the heavy metal recovery module; and the heavy metal will pass through The flow washing liquid of the recovery module is input to the waste water tank through the heavy metal recovery module-waste water tank line, and when the cation exchange resin in the heavy metal recovery module is saturated, the heavy metal recovery mold is washed by an anion regenerant. a cation exchange resin in the group to remove heavy metals from the heavy metal recovery module Cation exchange resin, and collection tank to the recovery of heavy metals from the recovery system to obtain a high concentration of heavy metals recovery solution. [00013] In a preferred embodiment, the cation exchange resin adsorption saturation in the heavy metal recovery module is determined by sampling the sampling point on the heavy metal recovery module-wastewater tank line to analyze the heavy metal content in the flow washing liquid. . [00014] The third aspect of the invention discloses a heavy metal recovery system for water, comprising: a first cation exchange resin, a second cation exchange resin, a third cation exchange resin, a heavy metal recovery module, a wastewater tank, and a a drain tank, and a recovery liquid tank; and the first cation exchange resin, the second cation exchange resin, and the third cation exchange resin are connected in series with each other, and the first cation exchange resin and the second cation exchange The resin and the third cation exchange resin are respectively connected to the heavy metal recovery module, the wastewater tank and the drainage tank by a pipeline; and the heavy metal recovery module is a fourth cation exchange resin, and the heavy metal recovery module And respectively connected to the wastewater tank and the recovery liquid tank by a pipeline. [00015] In a preferred embodiment, a sampling point is disposed on the heavy metal recovery module-wastewater tank line connecting the heavy metal recovery module and the wastewater tank. [00016] In a fourth aspect, the invention discloses a method for recovering heavy metals in water, comprising: providing a heavy metal recovery system in water as described in claim 6; flowing water from the wastewater tank of the recovery system to the first cation The exchange resin is treated to combine heavy metals in the water with the first cation exchange resin, and the treated water is then flowed into the second cation exchange resin for treatment, and the residual heavy metal in the water is combined with the second cation exchange resin and treated. The water after the drain is discharged through the drain tank 3; when the first cation exchange resin is not near saturation, the waste water line in the waste water tank is switched to the second cation exchange resin for treatment to make the heavy metal in the water and the second cation The exchange resin is combined, and the treated water is then flowed into the third cation exchange resin for treatment, the residual heavy metal in the water is combined with the third cation exchange resin, and the treated water is discharged through the drainage tank, and an anionic regenerant is used. Flowing the first cation exchange resin to remove the heavy metal from the first cation a sub-exchange resin, the first cation exchange resin can be reused, and the detached heavy metal stream is washed to the heavy metal recovery module, the detached heavy metal is combined with the fourth cation exchange resin, and the fourth cation exchange is performed. a flow washing liquid of the resin is input to the waste water tank via the heavy metal recovery module-waste water tank line; and when the second cation exchange resin is not near saturation, the waste water line in the waste water tank is switched to the third cation exchange resin Processing, combining heavy metal in water with the third cation exchange resin, and the treated water is then flowed into the regenerated first cation exchange resin for treatment, and the residual heavy metal in the water is combined with the first cation exchange resin, and treated The water after the drain is discharged through the drain tank, and the second cation exchange resin is washed by an anion regenerant to remove the heavy metal from the second cation exchange resin, and the second cation exchange resin can be reused, and the heavy metal stream to be detached Washing the heavy metal recovery module to remove the heavy metal from the fourth cation exchange tree Binding, and the flow washing liquid passing through the fourth cation exchange resin is input to the wastewater tank through the heavy metal recovery module-waste water tank line; when the third cation exchange resin is not near saturation, the waste water tank is in the waste water tank The waste water line is switched to the first cation exchange resin for treatment, the heavy metal in the water is combined with the first cation exchange resin, and the treated water is then flowed into the regenerated second cation exchange resin for treatment to make residual heavy metals in the water The second cation exchange resin is combined, and the treated water is discharged through the drainage tank, and the third cation exchange resin is washed by an anion regenerant to remove the heavy metal from the third cation exchange resin, and the third cation exchange resin may be Repeatedly, the detached heavy metal is washed to the heavy metal recovery module, the detached heavy metal is combined with the fourth cation exchange resin, and the flow washing liquid passing through the fourth cation exchange resin is passed through the heavy metal recovery module. - a waste water tank line is input to the waste water tank; when the fourth cation exchange resin is adsorbed And when the anion regenerant stream to the fourth washing the cation exchange resin, the heavy metal from the fourth cation exchange resin, and collection tank to the recovery of heavy metals from the recovery system to obtain a high concentration of heavy metals recovery solution. [00017] In a preferred embodiment, the fourth cation exchange resin adsorption saturation is determined by sampling the sample points on the heavy metal recovery module-wastewater tank line to analyze the heavy metal content in the flow wash.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which are to be understood Only the components and combinations related to the case are shown. The components shown in the figure are not drawn in proportion to the actual number, shape and size of the actual implementation. Some size ratios are proportional to other related dimensions or have been exaggerated or simplified. Provide a clearer description. The actual number, shape and size ratio of the implementation is an optional design, and the detailed component layout may be more complicated. [00022] According to a first embodiment of the present invention, an underwater heavy metal recovery system is illustrated as shown in the schematic diagram of FIG. The underwater heavy metal recovery system 2 of the present invention comprises a first heavy metal removal module 21, a second heavy metal removal module 22, a heavy metal recovery module 23, a waste water tank 24, a drain tank 25, and a recovery liquid tank 26 . The first heavy metal removal module 21 is connected to the wastewater tank 24 and the heavy metal recovery module 23 by a pipeline, and the first heavy metal removal module 21 has at least one cation exchange resin and a first drainage pipeline 211. The first drain line 211 is connected to the first heavy metal removal module 21 and the drain groove 25. The second heavy metal removal module 22 is connected to the wastewater tank 24 and the heavy metal recovery module 23 by a pipeline, and the second heavy metal removal module 22 has at least one cation exchange resin and a second drainage pipeline 221. The second drain line 221 is connected to the second heavy metal removal module 22 and the drain groove 25 . The heavy metal recovery module 23 is connected to the first heavy metal removal module 21, the second heavy metal removal module 22, the waste water tank 24, and the recovery liquid tank 26 by a pipeline, and the heavy metal recovery module 23 has At least one cation exchange resin. A sampling point 232 is disposed on the heavy metal recovery module-wastewater tank line 231 connected between the heavy metal recovery module 23 and the wastewater tank 24. [00023] Please continue to refer to FIG. 2, the method for recovering heavy metals in water according to the first embodiment of the present invention is that wastewater containing heavy metals first flows into the first heavy metal removal module 21 from the wastewater tank 24 for treatment, so that heavy metals in the wastewater are The cation exchange resin in the first heavy metal removal module 21 is combined, and the treated water is discharged from the first drainage line 211; after a fixed time, the cation exchange resin in the first heavy metal removal module 21 When the saturation is not near (for example, only 40% to 60% saturation), the wastewater line in the wastewater tank 24 is switched to the second heavy metal removal module 22 for treatment to make heavy metals in the wastewater and the second heavy metal. The cation exchange resin in the cleaning module 22 is combined, and the treated water is discharged from the second drain line 221; at this time, the cation exchange resin in the first heavy metal removal module 21 is washed by an anion regenerant, so that The heavy metal is separated from the cation exchange resin in the first heavy metal removal module 21, and the cation exchange resin in the first heavy metal removal module 21 can be reused; The heavy metal is flow-washed to the heavy metal recovery module 23 to combine the detached heavy metal with the cation exchange resin in the heavy metal recovery module 23; after a fixed time, the cation exchange resin in the second heavy metal removal module 22 When the saturation is not near (for example, only 40% to 60% saturation), the waste water line in the wastewater tank 24 is again switched to the first heavy metal removal module 21 for treatment, and at this time, the anion regenerator flow Washing the cation exchange resin in the second heavy metal removal module 22 to remove the heavy metal from the cation exchange resin in the second heavy metal removal module 22, and the cation exchange resin in the second heavy metal removal module 22 can be reused; The detached heavy metal is washed to the heavy metal recovery module 23, and the detached heavy metal is combined with the cation exchange resin in the heavy metal recovery module 23; the flow washing liquid passing through the heavy metal recovery module 23 passes through the heavy metal recovery module. - a waste water tank line 231 is input to the waste water tank 24, and is sampled through the sampling point 232 to analyze the heavy metal content in the flow wash liquid, when the flow wash liquid is heavy When the metal content reaches a certain standard, it indicates that the cation exchange resin in the heavy metal recovery module 23 is saturated, and the cation exchange resin in the heavy metal recovery module 23 is washed by an anion regenerant to remove the heavy metal from the heavy metal recovery module. The cation exchange resin in 23, and the detached heavy metal is collected into the recovery liquid tank 26 to obtain a high concentration heavy metal recovery liquid to be subjected to subsequent electrolytic recovery. [00024] According to a second embodiment of the present invention, as shown in FIG. 3A, the first heavy metal removal module and the second heavy metal removal module of the underwater heavy metal recovery system 3 of the second embodiment of the present invention are a cation exchange resin A, a second cation exchange resin B and a third cation exchange resin C are co-constituted, and the first cation exchange resin A, the second cation exchange resin B, and the third cation exchange resin C are respectively lined with each other. In series, the first cation exchange resin A, the second cation exchange resin B, and the third cation exchange resin C are respectively combined with a heavy metal recovery module 33, a wastewater tank 34, a drain tank 35, and a regenerant tank 37. Pipe connection. The heavy metal recovery module 33 is a fourth cation exchange resin D, and the heavy metal recovery module 33 is connected to the wastewater tank 34, a recovery liquid tank 36 and the regenerant tank 37, respectively, and the heavy metal A sampling point 332 is disposed on the heavy metal recovery module-wastewater tank line 331 connected between the recovery module 33 and the wastewater tank 34. [00025] The method for recovering heavy metals in water according to the second embodiment of the present invention is shown in FIG. 3B to FIG. Referring first to FIG. 3B, the heavy metal-containing wastewater first flows into the first cation exchange resin A from the wastewater tank 34 for treatment, so that the heavy metal in the wastewater is combined with the first cation exchange resin A, and the treated water then flows into the first The cation exchange resin B is treated to combine residual heavy metals in the water with the second cation exchange resin B to ensure that the heavy metal content in the treated wastewater is lower than the discharge standard, and then the treated wastewater is discharged through the drain tank 35. [00026] Referring to Figure 3C, after a fixed time, when the first cation exchange resin A is not near saturation (for example, only 40% to 60% saturation), the wastewater in the wastewater tank 34 The pipeline is switched to the second cation exchange resin B for treatment, the heavy metal in the wastewater is combined with the second cation exchange resin B, and the treated water is then flowed into the third cation exchange resin C for treatment to make residual heavy metals in the water The third cation exchange resin C is combined to ensure that the heavy metal content in the treated wastewater is lower than the discharge standard, and then the treated wastewater is discharged through the drain tank 35. At this time, the first cation exchange resin A is washed by an anion regenerant to remove the heavy metal from the first cation exchange resin A, and the first cation exchange resin A can be reused; and the separated heavy metal is washed to the heavy metal. The recovery module 33 is configured to combine the detached heavy metal with the fourth cation exchange resin D, and the flow washing liquid passing through the fourth cation exchange resin D is input to the wastewater tank via the heavy metal recovery module-wastewater tank line 331. 34. [00027] Please refer to FIG. 3D, after a fixed time, when the second cation exchange resin B is not near saturation (for example, only 40% to 60% saturation), the wastewater in the wastewater tank 34 The pipeline is switched to the third cation exchange resin C for treatment, the heavy metal in the wastewater is combined with the third cation exchange resin C, and the treated water is then flowed into the regenerated first cation exchange resin A for treatment to make residual water The heavy metal is combined with the first cation exchange resin A to ensure that the heavy metal content in the treated wastewater is lower than the discharge standard, and then the treated wastewater is discharged through the drain tank 35. At this time, the second cation exchange resin B is washed by an anion regenerant to remove the heavy metal from the second cation exchange resin B, and the second cation exchange resin B can be reused; and the separated heavy metal is washed to the heavy metal. The recovery module 33 is configured to combine the detached heavy metal with the fourth cation exchange resin D, and the flow washing liquid passing through the fourth cation exchange resin D is input to the wastewater tank via the heavy metal recovery module-wastewater tank line 331. 34. [00028] Please refer to FIG. 3E, after a fixed time, when the third cation exchange resin C is not near saturation (for example, only 40% to 60% saturation), the wastewater in the wastewater tank 34 The pipeline is switched to the first cation exchange resin A for treatment, the heavy metal in the wastewater is combined with the first cation exchange resin A, and the treated water is then flowed into the regenerated second cation exchange resin B for treatment to make residual water The heavy metal is combined with the second cation exchange resin B to ensure that the heavy metal content in the treated wastewater is lower than the discharge standard, and then the treated wastewater is discharged through the drain tank 35. At this time, the third cation exchange resin C is washed by an anion regenerant to remove the heavy metal from the third cation exchange resin C, and the third cation exchange resin C can be reused; and the separated heavy metal is washed to the heavy metal. The recovery module 33 is configured to combine the detached heavy metal with the fourth cation exchange resin D, and the flow washing liquid passing through the fourth cation exchange resin D is input to the wastewater tank via the heavy metal recovery module-wastewater tank line 331. 34. [00029] Please refer to FIG. 3F. After a period of time, the sample is analyzed by sampling point 332 to analyze the heavy metal content in the flow washing liquid. When the heavy metal content in the flow washing liquid reaches a certain standard, the fourth cation exchange resin D is indicated. The adsorption reaches saturation. At this time, the fourth cation exchange resin D is washed by the anion regenerant to remove the heavy metal from the fourth cation exchange resin D, and the separated heavy metal is collected into the recovery liquid tank 36 to obtain a high concentration heavy metal recovery liquid. Wait for subsequent electrolytic recovery. [00030] Therefore, from the above description, the present invention has the following advantages: [00031] The water heavy metal recovery system provided by the present invention adds a heavy metal recovery module to remove the heavy metal function of the cation exchange resin from water. The function of recovering heavy metals is separate. The heavy metal removal module responsible for removing heavy metals in water can be regenerated before the cation exchange resin has reached saturation, to ensure that the heavy metals in the wastewater are completely combined with the cation exchange resin, and the discharged waste water has low heavy metal content. The emission standards are in compliance with the regulations and do not pollute the environment. In addition, the heavy metal recovery system provided by the invention has a heavy metal recovery module, which can collect the heavy metal separated by the heavy metal removal module, and absorb the heavy metal of the cation exchange resin in the heavy metal recovery module. When it is fully saturated, it is regenerated to obtain a high-concentration heavy metal recovery liquid, which can improve the efficiency of subsequent heavy metal electrolysis recovery. The detailed description of the preferred embodiments of the present invention is not intended to limit the scope of the present invention. It should be included in the patent scope of this case. [00034] In summary, the technical features disclosed in this case have fully complied with the novelty and progressive statutory invention patent requirements, and the application is filed according to law, and you are requested to approve the invention patent application, in order to invent invention, to the sense Will.

【00035】
1‧‧‧Used water heavy metal recovery system
11‧‧‧First cation exchange resin
12‧‧‧Second cation exchange resin
13‧‧‧ Wastewater tank
14‧‧‧Drainage trough
15‧‧‧Recycling tank
2‧‧‧Water Heavy Metal Recovery System
21‧‧‧First Heavy Metal Removal Module
211‧‧‧First drainage line
22‧‧‧Second Heavy Metal Removal Module
221‧‧‧Second drain line
23‧‧‧Heavy metal recycling module
231‧‧‧Heavy Metal Recovery Module - Wastewater Tank Pipeline
232‧‧ ‧ sampling point
24‧‧‧ Wastewater tank
25‧‧‧Drainage trough
26‧‧‧Recycling tank
3‧‧‧Water Heavy Metal Recovery System
A‧‧‧First Cation Exchange Resin
B‧‧‧Second cation exchange resin
C‧‧‧ third cation exchange resin
33‧‧‧Heavy metal recycling module
331‧‧‧Heavy Metal Recycling Module - Wastewater Tank Pipeline
332‧‧‧ sampling points
D‧‧‧fourth cation exchange resin
34‧‧‧ Wastewater tank
35‧‧‧Drainage trough
36‧‧‧Recycling tank
37‧‧‧Regenerant tank

[00018] Figure 1 is a schematic diagram of the structure of a heavy metal recovery system in water. [00019] FIG. 2 is a schematic structural view of a heavy metal recovery system in water according to a first embodiment of the present invention. [00020] FIG. 3A is a schematic view showing the arrangement of the heavy metal recovery system in the water according to the second embodiment of the present invention; and FIG. 3B to FIG. 3F are schematic diagrams showing the operation of the heavy metal recovery system in the water according to the second embodiment of the present invention. The solid line in the figure indicates the flow of liquid, and the broken line indicates that there is no liquid flow.

2‧‧‧Water Heavy Metal Recovery System

21‧‧‧First Heavy Metal Removal Module

211‧‧‧First drainage line

22‧‧‧Second Heavy Metal Removal Module

221‧‧‧Second drain line

23‧‧‧Heavy metal recycling module

231‧‧‧Heavy Metal Recovery Module - Wastewater Tank Pipeline

232‧‧ ‧ sampling point

24‧‧‧ Wastewater tank

25‧‧‧Drainage trough

26‧‧‧Recycling tank

Claims (9)

A heavy metal recovery system for water, comprising: a first heavy metal removal module, a second heavy metal removal module, a heavy metal recovery module, a wastewater tank, and a recovery liquid tank; and the first heavy metal removal module respectively The waste water tank and the heavy metal recovery module are connected by a pipeline, and the first heavy metal removal module has at least one cation exchange resin and a first drainage pipeline; the second heavy metal removal module and the wastewater tank respectively The heavy metal recovery module is connected by a pipeline, and the second heavy metal removal module has at least one cation exchange resin and a second drainage pipeline; and the heavy metal recovery module and the first heavy metal removal module and the second The heavy metal removal module, the wastewater tank, and the recovery liquid tank are connected by a pipeline, and the heavy metal recovery module has at least one cation exchange resin. The heavy metal recovery system for water according to claim 1, further comprising a drainage channel connecting the first heavy metal removal module and the drainage channel, and the second drainage pipe is connected The second heavy metal removal module and the drain groove. The heavy metal recovery system for water according to claim 1, wherein the heavy metal recovery module and the waste water tank connected to the waste water tank are provided with a sampling point. A method for recovering heavy metals in water, comprising: providing a heavy metal recovery system in water as described in claim 1; flowing water from a waste water tank of the recovery system to a first heavy metal removal module of the recovery system for processing The heavy metal in the water is combined with the cation exchange resin in the first heavy metal removal module, and the treated water is discharged from the first drainage line; when the cation exchange resin in the first heavy metal removal module is not saturated, The waste water line in the waste water tank is switched to the second heavy metal removal module of the recovery system for processing, the heavy metal in the water is combined with the cation exchange resin in the second heavy metal removal module, and the treated water is drained by the second drain The cation exchange resin in the first heavy metal removal module is washed by an anion regenerant to remove the heavy metal from the cation exchange resin in the first heavy metal removal module, and the cation exchange resin in the first heavy metal removal module Reusable, and the detached heavy metal stream is washed to the heavy metal recovery module to make it detached Is associated with the cation exchange resin in the heavy metal recovery module; when the cation exchange resin in the second heavy metal removal module is not near saturation, the waste water line in the waste water tank is switched to the first heavy metal removal module Treating, and washing the cation exchange resin in the second heavy metal removal module with an anion regenerant to remove heavy metals from the cation exchange resin in the second heavy metal removal module, and the cation exchange resin in the second heavy metal removal module Reusable, and the detached heavy metal stream is washed to the heavy metal recovery module to combine the detached heavy metal with the cation exchange resin in the heavy metal recovery module; and the flow washing liquid passing through the heavy metal recovery module is passed through the The heavy metal recovery module-wastewater tank line is input to the waste water tank, and when the cation exchange resin in the heavy metal recovery module is saturated, the cation exchange resin in the heavy metal recovery module is washed with an anion regenerant to make heavy metal Remove the cation exchange resin from the heavy metal recovery module and remove the weight The metal is collected into the recovery tank of the recovery system to obtain a high concentration heavy metal recovery liquid. The method for recovering heavy metals in water according to claim 5, wherein the cation exchange resin adsorption saturation in the heavy metal recovery module is sampled and analyzed in the flow washing liquid through the sampling point on the heavy metal recovery module-waste water tank line. The heavy metal content is determined. A heavy metal recovery system for water, comprising: a first cation exchange resin, a second cation exchange resin, a third cation exchange resin, a heavy metal recovery module, a waste water tank, a drain tank, and a recovery liquid tank; The first cation exchange resin, the second cation exchange resin, and the third cation exchange resin are respectively connected in series with each other, and the first cation exchange resin, the second cation exchange resin, and the third cation exchange resin are respectively And the heavy metal recovery module, the wastewater tank and the drainage tank are connected by a pipeline; and the heavy metal recovery module is a fourth cation exchange resin, and the heavy metal recovery module is respectively associated with the wastewater tank and the recovery liquid The slots are connected by pipes. For example, in the heavy metal recovery system of the water according to claim 6, wherein the heavy metal recovery module and the waste water tank connected to the waste water tank are provided with a sampling point. A method for recovering heavy metals in water, comprising: providing a heavy metal recovery system in water as described in claim 6; flowing water from the waste water tank of the recovery system to the first cation exchange resin for treatment to make heavy metals in the water The first cation exchange resin is combined, and the treated water is then flowed into the second cation exchange resin for treatment, the residual heavy metal in the water is combined with the second cation exchange resin, and the treated water is discharged through the drain tank 3; When the first cation exchange resin is not near saturation, the waste water line in the waste water tank is switched to the second cation exchange resin for treatment, the heavy metal in the water is combined with the second cation exchange resin, and the treated water is then flowed in. The third cation exchange resin is treated to combine residual heavy metals in the water with the third cation exchange resin, and the treated water is discharged through the drain tank, and the first cation exchange resin is washed with an anion regenerant. Heavy metal is detached from the first cation exchange resin, the first cation exchange The grease can be reused, and the detached heavy metal is washed to the heavy metal recovery module, the detached heavy metal is combined with the fourth cation exchange resin, and the flow washing liquid passing through the fourth cation exchange resin is recovered through the heavy metal. a module-wastewater tank line is input to the waste water tank; when the second cation exchange resin is not nearly saturated, the waste water line in the waste water tank is switched to the third cation exchange resin for treatment, and the heavy metal in the water is The third cation exchange resin is combined, and the treated water is then flowed into the regenerated first cation exchange resin for treatment, the residual heavy metal in the water is combined with the first cation exchange resin, and the treated water is discharged through the drain tank. And washing the second cation exchange resin with an anion regenerant to remove the heavy metal from the second cation exchange resin, the second cation exchange resin can be reused, and the detached heavy metal stream is washed to the heavy metal recovery module, so that The detached heavy metal is combined with the fourth cation exchange resin and will pass through the fourth cation a flow washing liquid of the resin is input to the waste water tank via the heavy metal recovery module-drainage tank line; and when the third cation exchange resin is not near saturation, the waste water line in the waste water tank is switched to the first cation exchange resin Processing to combine heavy metals in the water with the first cation exchange resin, and the treated water is then flowed into the regenerated second cation exchange resin for treatment to combine residual heavy metals in the water with the second cation exchange resin and to treat The water after the drain is discharged through the drain tank, and the third cation exchange resin is washed by an anion regenerant to remove the heavy metal from the third cation exchange resin, and the third cation exchange resin can be reused again, and the heavy metal stream to be detached Washing to the heavy metal recovery module, combining the detached heavy metal with the fourth cation exchange resin, and inputting the flow washing liquid passing through the fourth cation exchange resin to the wastewater tank through the heavy metal recovery module-wastewater tank line When the fourth cation exchange resin is saturated, the anion regenerant is used to wash the first Cation exchange resin, the heavy metal from the fourth cation exchange resin, and collection tank to the recovery of heavy metals from the recovery system to obtain a high concentration of heavy metals recovery solution. The method for recovering heavy metals in water according to claim 8, wherein the fourth cation exchange resin adsorption saturation is obtained by sampling the sampling points on the heavy metal recovery module-wastewater tank line to analyze the heavy metal content in the flow washing liquid. Decide.