CN211445340U - Electrolytic tinning passivation chromium-containing wastewater recycling system - Google Patents
Electrolytic tinning passivation chromium-containing wastewater recycling system Download PDFInfo
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- CN211445340U CN211445340U CN201922427205.9U CN201922427205U CN211445340U CN 211445340 U CN211445340 U CN 211445340U CN 201922427205 U CN201922427205 U CN 201922427205U CN 211445340 U CN211445340 U CN 211445340U
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Abstract
The application discloses a recycling system for chromium-containing wastewater of electrotinning passivation, which relates to the technical field of industrial sewage treatment, and is provided with a wastewater collection container, a pre-filtering mechanism, a cation exchange mechanism and an anion exchange mechanism which are sequentially connected through a pipeline, wherein the wastewater collection container stores the chromium-containing wastewater, the pre-filtering mechanism removes suspended matters, the cation exchange mechanism adsorbs metal ions, the anion exchange mechanism adsorbs dichromate, the treated effluent flows into a water recovery container, the cation exchange mechanism and the anion exchange mechanism are respectively regenerated through an acid adding mechanism and an alkali adding mechanism when the adsorption is saturated, the wastewater flowing out in the regeneration stage flows into the chromium recovery container as chromium recovery liquid, the system can sequentially carry out pretreatment, ion exchange method treatment and chromium-containing wastewater of electrotinning passivation, and specifically remove pollutants in the wastewater, the obtained sodium dichromate recovered liquid and recovered water can be returned to the production line for continuous utilization, so that the pollution is reduced and the operation cost is reduced.
Description
[ technical field ] A method for producing a semiconductor device
The application relates to the technical field of industrial sewage treatment, in particular to a recycling system for chromium-containing wastewater from electrotinning passivation.
[ background of the invention ]
For enterprises producing tinplate series products, a certain amount of wastewater containing hexavalent chromium pollutants is generated in the passivation process in the production process of the electrotinning steel sheet. Hexavalent chromium belongs to the pollutant containing heavy metal which is strictly controlled and discharged by the state, so how to reasonably treat chromium-containing wastewater and realize the recycling of heavy metal and water is an urgent problem to be solved.
[ Utility model ] content
In order to solve the technical problem, the application provides a simple structure's a chromium-containing waste water recovery system of electrotinning passivation, can effectually handle waste water, can obtain sodium dichromate recovery liquid and reclaimed water, then the sodium dichromate recovery liquid that obtains can return the production line with the reclaimed water and continue to utilize, pollution abatement and reduction operation cost.
In order to solve the technical problem, the following technical scheme is adopted in the application:
the utility model provides an electrotinning passivation chromium-containing waste water recovery system of recycling, includes the waste water collection container who is used for storing chromium-containing waste water that connects gradually through the pipeline, be used for carrying out primary filtration treatment's prefiltering mechanism, can be used for adsorbing the cation exchange mechanism of metal ion in chromium-containing waste water and can be used for adsorbing the anion exchange mechanism of dichromate in chromium-containing waste water, the export of anion exchange mechanism is divided into two routes, and one route is passed through the pipeline and is retrieved water container intercommunication, and another route is passed through the pipeline and is retrieved chromium container intercommunication, be provided with the acid that is used for adding acidic regenerant on the cation exchange mechanism and add the mechanism, be provided with the alkali that is used for adding alkaline regenerant on the anion exchange mechanism and add the mechanism.
The system for recycling chromium-containing wastewater after electrotinning passivation comprises a wastewater pump, a quartz sand filter, a precision filter and a prefiltered water collecting container which are sequentially communicated through pipelines, wherein the wastewater pump is used for conveying chromium-containing wastewater from the wastewater collecting container to the quartz sand filter, the quartz sand filter and the precision filter are used for sequentially carrying out primary filtration on the chromium-containing wastewater to remove suspended matters in the chromium-containing wastewater, and the prefiltered water collecting container is used for storing the primarily filtered chromium-containing wastewater.
The electrolytic tinning passivation chromium-containing wastewater recycling system comprises a cation pump, a first cation exchanger and a second cation exchanger, wherein a pre-filtering water inlet communicated with a wastewater collection container through a pipeline and a regeneration acid adding port communicated with an acid adding mechanism through a pipeline are arranged on the water inlet ends of the first cation exchanger and the second cation exchanger, a cation removing water outlet communicated with the anion exchange mechanism through a pipeline is arranged on the water outlet end of the first cation exchanger and the second cation exchanger, the cation pump is arranged on the pipeline between the wastewater collection container and the first cation exchanger and the second cation exchanger and used for conveying primary chromium-containing filtered wastewater, and a cation exchange resin capable of adsorbing metal ions is arranged in the first cation exchanger and the second cation exchanger .
According to the system for recycling chromium-containing wastewater from electrotinning passivation, the prefiltering water inlet, the regenerated acid adding port and the cation removing water outlet are respectively provided with a control valve.
The system for recycling chromium-containing wastewater from electrotinning passivation comprises an anion exchange mechanism, a first anion exchanger, a second anion exchanger and a third anion exchanger, the water inlet ends of the first anion exchanger, the second anion exchanger and the third anion exchanger are respectively provided with a cation removing water inlet communicated with the cation exchange mechanism through a pipeline and a regenerated alkali adding port communicated with the alkali adding mechanism through a pipeline, and the water outlet ends of the first anion exchanger, the second anion exchanger and the third anion exchanger are respectively provided with a recovered water outlet communicated with the recovered water container through a pipeline and a recovered chromium outlet communicated with the recovered chromium container through a pipeline, anion exchange resins are arranged in the first anion exchanger, the second anion exchanger and the third anion exchanger.
According to the system for recycling chromium-containing wastewater from electrotinning passivation, the water inlets and the water outlets of the first anion exchanger, the second anion exchanger and the third anion exchanger are respectively provided with a control valve.
In the system for recycling chromium-containing wastewater from electrotinning passivation, the acid adding mechanism comprises a regenerated acid medicine box and a regenerated acid pump, the regenerated acid medicine box is communicated with the cation exchange mechanism through a pipeline, an acidic regenerant is arranged in the regenerated acid medicine box, and the regenerated acid pump is arranged on the pipeline between the regenerated acid medicine box and the cation exchange mechanism and is used for conveying the acidic regenerant in the regenerated acid medicine box to the cation exchange mechanism.
In the above system for recycling chromium-containing wastewater from electrotinning passivation, the alkali addition means includes a regenerated alkali medicine tank and a regenerated alkali pump, the regenerated alkali medicine tank is communicated with the anion exchange means through a pipeline, an alkaline regenerant is provided in the regenerated alkali medicine tank, and the regenerated alkali pump is provided on a pipeline between the regenerated alkali medicine tank and the anion exchange means and is configured to transport the alkaline regenerant in the regenerated alkali medicine tank to the anion exchange means.
According to the system for recycling chromium-containing wastewater from electrotinning passivation, an evaporation concentration mechanism for evaporating and concentrating the chromium-recovered solution flowing out of the anion exchange mechanism is arranged between the anion exchange mechanism and the chromium-recovered container.
The system for recycling the chromium-containing wastewater after electrotinning passivation further comprises a plurality of groups of wastewater monitoring systems which are arranged on the pipeline and used for detection, wherein the wastewater monitoring systems are formed by connecting one or more of a pressure gauge, a flowmeter, an on-line conductivity monitor and a pH meter in series.
Compared with the prior art, the beneficial effects of this application are as follows:
the utility model provides a system is recycled in electrolytic tinning passivation chromium-containing waste water recovery is provided with the waste water collection container, filter mechanism, cation exchange mechanism, anion exchange mechanism that connect gradually through the pipeline, wherein the waste water collection container is used for storing chromium-containing waste water, carries out the prefiltering in advance to chromium-containing waste water through filter mechanism in advance in order to detach the suspended solid in the waste water, adsorbs metal ion in the waste water through cation exchange mechanism, for example (Cr3+、Fe2+) The aim is to prevent metal ions from influencing the subsequent ion exchange process, then the dichromate in the wastewater is adsorbed by an anion exchange mechanism, the chromium content of the effluent treated by the anion exchange mechanism reaches the discharge standard (meets the recycling requirement of passivation spray water), the effluent flows into a reclaimed water container from one outlet of the anion exchange mechanism, the exchange is stopped when the adsorption of the cation exchange mechanism and the anion exchange mechanism is saturated, an acidic regenerant is added into the cation exchange mechanism by an acid adding mechanism, a basic regenerant is added into the anion exchange mechanism by an alkali adding mechanism, the cation exchange mechanism and the anion exchange mechanism are respectively regenerated to recover the exchange capacity, meanwhile, chromium in the wastewater flowing out in the regeneration stage flows out from the anion exchange mechanism in the form of sodium dichromate and can flow into a chromium recovery container from the other outlet of the anion exchange mechanism as chromium recovery liquid (meeting the recovery requirement of passivation bath liquid), the system can be used for sequentially treating the chromium-containing wastewater after the electrotinning passivation by adopting a pretreatment method and an ion exchange method and recycling the chromium-containing wastewater, specifically removing pollutants in the wastewater, wherein the obtained recovered water can be used for a passivation spray tank, the obtained chromium recovered liquid can be returned to a passivation tank for continuous use, and then the obtained sodium dichromate recovered liquid and the recovered water can be returned to a production line for continuous use, so that the pollution is reduced and the operation cost is reduced.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic diagram of a system for recycling chromium-containing wastewater from electrotinning passivation according to the application.
[ detailed description ] embodiments
Referring to fig. 1, the system for recycling chromium-containing wastewater from electrotinning passivation comprises a wastewater collection container 1 for storing chromium-containing wastewater, a pre-filtering mechanism 2 for performing primary filtering treatment on the chromium-containing wastewater, a cation exchange mechanism 3 for adsorbing metal ions in the chromium-containing wastewater and an anion exchange mechanism 4 for adsorbing dichromate in the chromium-containing wastewater, which are sequentially connected through pipelines, wherein the outlet of the anion exchange mechanism 4 is divided into two paths, one path is communicated with a recycled water container 5 through a pipeline, the other path is communicated with a recycled chromium container 6 through a pipeline, an acid adding mechanism 7 for adding an acid regenerant is arranged on the cation exchange mechanism 3, and an alkali adding mechanism 8 for adding an alkali regenerant is arranged on the anion exchange mechanism 4.
The utility model provides a system is recycled in electrolytic tinning passivation chromium-containing waste water recovery is provided with waste water collecting container 1, prefiltering mechanism 2, cation exchange mechanism 3, anion exchange mechanism 4 that connect gradually through the pipeline, wherein waste water collecting container 1 is used for storing chromium-containing waste water, carries out the primary prefiltering through prefiltering mechanism 2 to chromium-containing waste water in order to detach the suspended solid in the waste water, adsorbs metal ion in the waste water through cation exchange mechanism 3, if (Cr)3+、Fe2+) The aim is to prevent metal ions from influencing the subsequent ion exchange process, then the dichromate in the wastewater is adsorbed by the anion exchange mechanism 4, the chromium content of the effluent treated by the anion exchange mechanism 4 reaches the discharge standard (meets the recycling requirement of passivation spray water), the effluent flows into the reclaimed water container 5 from one outlet of the anion exchange mechanism 4, the exchange is stopped when the cation exchange mechanism 3 and the anion exchange mechanism 4 are adsorbed and saturated, the acidic regenerant is added into the cation exchange mechanism 3 by the acid adding mechanism 7, the alkaline regenerant is added into the anion exchange mechanism 4 by the alkali adding mechanism 8, the cation exchange mechanism 3 and the anion exchange mechanism 4 are respectively regenerated to recover the exchange capacity, and simultaneously the chromium in the wastewater flowing out in the regeneration stage flows out from the anion exchange mechanism 4 in the form of sodium dichromate, can be used as chromium recovery liquid (meeting the requirement of passivation tank liquor recovery)And the system can be used for sequentially treating the chromium-containing wastewater subjected to electrotinning passivation by adopting a pretreatment method and an ion exchange method and recycling the chromium-containing wastewater, specifically removing pollutants in the wastewater, wherein the obtained recycled water can be used for a passivation spraying tank, the obtained chromium recovery solution can be returned to the passivation spraying tank for continuous use, and then the obtained sodium dichromate recovery solution and the recycled water can be returned to a production line for continuous use, so that the pollution is reduced and the operation cost is reduced.
The pre-filtering mechanism 2 comprises a waste water pump 21, a quartz sand filter 22, a precision filter 23 and a pre-filtering water collecting container 24 which are sequentially communicated through pipelines, wherein the waste water pump 21 is used for conveying the chromium-containing waste water from the waste water collecting container 1 to the quartz sand filter 22, the quartz sand filter 22 and the precision filter 23 are used for sequentially carrying out primary filtering on the chromium-containing waste water to remove suspended matters in the chromium-containing waste water, and the pre-filtering water collecting container 24 is used for storing the primarily filtered chromium-containing waste water. The quartz sand filter 22 is arranged for intercepting particle impurities such as suspended substance colloid and the like in the wastewater, the precision filter 23 is arranged for removing impurities such as suspended substance, particles, iron rust and the like in the wastewater, and suspended substances in the wastewater are removed through the pre-filtering mechanism 2, and a 5-micron filter element is preferably adopted as the precision filter.
Cation exchange mechanism 3 includes cation pump 31, first cation exchanger 32 and second cation exchanger 33, first cation exchanger 32 with be provided with on the intake of second cation exchanger 33 through the pipeline with prefiltering water inlet 301 of wastewater collection container 1 intercommunication and through the pipeline with the regeneration acid that acid adds mechanism 7 intercommunication adds mouth 302, just first cation exchanger 32 with all be provided with on the outlet of second cation exchanger 33 through the pipeline with anion exchange mechanism 4 intercommunication remove cation delivery port 303, cation pump 31 is located wastewater collection container 1 with first cation exchanger 32 with be used for carrying the chromium-containing waste water of first filtration on the pipeline between second cation exchanger 33, first cation exchanger 32 with all be provided with in the second cation exchanger 33 and can be used for adsorbing the cation exchange resin of metal ion . The cation exchange mechanism 3 of the present application is provided with a first cation exchanger 32 and a second cation exchanger 33, and a one-use-one-standby mode is used, when one of them is saturated by adsorption, the adsorption exchange is stopped, and a regenerated acid agent is added to enter a regeneration stage, and at the same time, the adsorption exchange is switched to the other one to carry out the adsorption exchange, so that the work efficiency is improved.
Control valves are arranged on the pre-filtering water inlet 301, the regenerated acid adding port 302 and the cation removing water outlet 303. The pipeline switching of the wastewater and the regenerated acid agent is carried out through the control of a control valve, the pre-filtering water inlet 301 and the cation water outlet 303 are cut off when the ion exchanger is saturated, and the regenerated acid adding port 302 is opened to add the regenerated acid agent for regeneration.
The anion exchange means 4 comprises a first anion exchanger 41, a second anion exchanger 42 and a third anion exchanger 43, the water inlet ends of the first anion exchanger 41, the second anion exchanger 42 and the third anion exchanger 43 are respectively provided with a cation removing water inlet 401 communicated with the cation exchange mechanism 3 through a pipeline and a regenerated alkali adding buckle 402 communicated with the alkali adding mechanism through a pipeline, and the water outlet ends of the first anion exchanger 41, the second anion exchanger 42 and the third anion exchanger 43 are respectively provided with a recycled water outlet 403 communicated with the recycled water container 5 through a pipeline and a recycled chromium outlet 404 communicated with the recycled chromium container 6 through a pipeline, anion exchange resins are disposed in the first anion exchanger 41, the second anion exchanger 42, and the third anion exchanger 43. The anion exchange mechanism 4 of the application adopts dual-purpose one and is equipped with, switches over to get into waste water and opens regenerated alkali and regenerates when one of them anion exchanger is saturated, improves technology smoothness nature and filtration efficiency in proper order.
Control valves are arranged on the water inlets and the water outlets of the first anion exchanger 41, the second anion exchanger 42 and the third anion exchanger 43. The pipeline switching is carried out through the control valve, the control valve is preferably an electromagnetic valve, the online control is carried out through a circuit, and the automation is improved.
The acid adding means 7 includes a regenerated acid tank 71 and a regenerated acid pump 72, the regenerated acid tank 71 is communicated with the cation exchange means 3 via a pipe, the regenerated acid tank 71 is provided with an acidic regenerant, and the regenerated acid pump 72 is provided on a pipe between the regenerated acid tank 71 and the cation exchange means 3 and is configured to transport the acidic regenerant in the regenerated acid tank 71 to the cation exchange means 3. The amount of the acidic regenerant added to the regenerated acid tank 71 is controlled by controlling the regenerated acid pump 72, and preferably, the acidic regenerant is sulfuric acid, and the regenerated acid pump 72 is controlled by a circuit, thereby improving the degree of automation.
The alkali adding means 8 includes a regenerated alkali medicine box 81 and a regenerated alkali pump 82, the regenerated alkali medicine box 81 is communicated with the anion exchange means 4 through a pipeline, an alkaline regenerant is provided in the regenerated alkali medicine box 81, and the regenerated alkali pump 82 is provided on a pipeline between the regenerated alkali medicine box 81 and the anion exchange means 4 and is configured to convey the alkaline regenerant in the regenerated alkali medicine box 81 to the anion exchange means 4. The amount of alkaline regenerant added is controlled by controlling the regenerant alkaline pump 82, preferably sodium hydroxide, and the anion exchanger is regenerated by addition.
An evaporation and concentration mechanism 9 which can be used for carrying out evaporation and concentration on the recovered chromium solution flowing out of the anion exchange mechanism 4 is arranged between the anion exchange mechanism 4 and the chromium recovery container 6. The chromium recovery liquid flowing out of the anion exchange mechanism 4 can be evaporated and concentrated by the evaporation and concentration mechanism 9, so that the concentration of the dichromic acid in the chromium recovery liquid is improved.
The device also comprises a plurality of groups of wastewater monitoring systems 10 which are arranged on the pipeline and used for detection, wherein the wastewater monitoring systems 10 are formed by connecting one or more of a pressure gauge, a flow meter, an on-line conductivity monitor and a pH meter in series. Various indexes of the wastewater in the pipeline can be intuitively reflected through the wastewater monitoring system 10, so that the water flow, the water pressure, the pH value and the like can be adjusted on line, and the filtering effect of the system is improved.
The application discloses electrolytic tinning passivation chromium-containing waste water recycling systemThe system is provided with a wastewater collection container 1, a pre-filtering mechanism 2, a cation exchange mechanism 3 and an anion exchange mechanism 4 which are sequentially connected through a pipeline, wherein the wastewater collection container 1 is used for storing chromium-containing wastewater, the chromium-containing wastewater is subjected to primary pre-filtering through the pre-filtering mechanism 2 to remove suspended matters in the wastewater, and metal ions in the wastewater, such as (Cr) are adsorbed through the cation exchange mechanism 33+、Fe2+) The aim is to prevent metal ions from influencing the subsequent ion exchange process, then the dichromate in the wastewater is adsorbed by the anion exchange mechanism 4, the chromium content of the effluent treated by the anion exchange mechanism 4 reaches the discharge standard (meets the recycling requirement of passivation spray water), the effluent flows into the reclaimed water container 5 from one outlet of the anion exchange mechanism 4, the exchange is stopped when the cation exchange mechanism 3 and the anion exchange mechanism 4 are adsorbed and saturated, the acidic regenerant is added into the cation exchange mechanism 3 by the acid adding mechanism 7, the alkaline regenerant is added into the anion exchange mechanism 4 by the alkali adding mechanism 8, the cation exchange mechanism 3 and the anion exchange mechanism 4 are respectively regenerated to recover the exchange capacity, and simultaneously the chromium in the wastewater flowing out in the regeneration stage flows out from the anion exchange mechanism 4 in the form of sodium dichromate, the chromium-containing waste water obtained by the method can be used as chromium recovery liquid (meeting the requirement of passivation tank liquid recovery) to flow into a chromium recovery container 6 from the other outlet of the anion exchange mechanism 4, the system can be used for sequentially carrying out pretreatment, ion exchange treatment and recycling on the chromium-containing waste water obtained by the passivation of the electrotinning, specifically removing pollutants in the waste water, the obtained recovered water can be used for a passivation spraying tank, the obtained chromium recovery liquid can be returned to the passivation tank for continuous use, and then the obtained sodium dichromate recovery liquid and the recovered water can be returned to a production line for continuous use, so that the pollution is reduced and the operation cost is reduced.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides an electrotinning passivation chromium-containing waste water recovery system of recycling which characterized in that: the device comprises a wastewater collection container (1) for storing chromium-containing wastewater, a pre-filtering mechanism (2) for performing primary filtering treatment on the chromium-containing wastewater, a cation exchange mechanism (3) for adsorbing metal ions in the chromium-containing wastewater and an anion exchange mechanism (4) for adsorbing dichromate in the chromium-containing wastewater, wherein the wastewater collection container (1), the cation exchange mechanism and the anion exchange mechanism are sequentially connected through pipelines, the outlet of the anion exchange mechanism (4) is divided into two paths, one path is communicated with a water recovery container (5) through a pipeline, the other path is communicated with a chromium recovery container (6) through a pipeline, an acid adding mechanism (7) for adding an acid regenerant is arranged on the cation exchange mechanism (3), and an alkali adding mechanism (8) for adding an alkali regenerant is arranged on the anion exchange mechanism (4).
2. The system for recycling chromium-containing wastewater from electrotinning passivation according to claim 1, which is characterized in that: the pre-filtering mechanism (2) comprises a wastewater pump (21), a quartz sand filter (22), a precision filter (23) and a pre-filtering water collecting container (24) which are sequentially communicated through a pipeline, wherein the wastewater pump (21) is used for conveying chromium-containing wastewater to the quartz sand filter (22) from the wastewater collecting container (1), the quartz sand filter (22) and the precision filter (23) are used for sequentially filtering the chromium-containing wastewater for the first time to remove suspended matters in the chromium-containing wastewater, and the pre-filtering water collecting container (24) is used for storing the chromium-containing wastewater which is filtered for the first time.
3. The system for recycling chromium-containing wastewater from electrotinning passivation according to claim 1, which is characterized in that: the cation exchange mechanism (3) comprises a cation pump (31), a first cation exchanger (32) and a second cation exchanger (33), a prefiltering water inlet (301) communicated with the wastewater collection container (1) through a pipeline and a regenerated acid adding port (302) communicated with the acid adding mechanism (7) through a pipeline are arranged on the water inlet end of the first cation exchanger (32) and the second cation exchanger (33), a cation removing water outlet (303) communicated with the anion exchange mechanism (4) through a pipeline is arranged on the water outlet end of the first cation exchanger (32) and the second cation exchanger (33), the cation pump (31) is arranged on the pipeline between the wastewater collection container (1) and the first cation exchanger (32) and the second cation exchanger (33) and is used for conveying chromium-containing wastewater subjected to primary filtration, cation exchange resins which can be used for adsorbing metal ions are arranged in the first cation exchanger (32) and the second cation exchanger (33).
4. The system for recycling chromium-containing wastewater from electrotinning passivation according to claim 3, wherein the system comprises: control valves are arranged on the pre-filtering water inlet (301), the regenerated acid adding port (302) and the cation removing water outlet (303).
5. The system for recycling chromium-containing wastewater from electrotinning passivation according to claim 1, which is characterized in that: the anion exchange mechanism (4) comprises a first anion exchanger (41), a second anion exchanger (42) and a third anion exchanger (43), the water inlet ends of the first anion exchanger (41), the second anion exchanger (42) and the third anion exchanger (43) are respectively provided with a cation removing water inlet (401) communicated with the cation exchange mechanism (3) through a pipeline and a regenerated alkali adding port (402) communicated with the alkali adding mechanism through a pipeline, the water outlet ends of the first anion exchanger (41), the second anion exchanger (42) and the third anion exchanger (43) are respectively provided with a recovered water outlet (403) communicated with the recovered water container (5) through a pipeline and a recovered chromium outlet (404) communicated with the recovered chromium container (6) through a pipeline, anion exchange resins are arranged in the first anion exchanger (41), the second anion exchanger (42) and the third anion exchanger (43).
6. The system for recycling chromium-containing wastewater from electrotinning passivation according to claim 5, wherein the system comprises: control valves are arranged on the water inlet and the water outlet of the first anion exchanger (41), the second anion exchanger (42) and the third anion exchanger (43).
7. The system for recycling chromium-containing wastewater from electrotinning passivation according to claim 1, which is characterized in that: the acid adding mechanism (7) comprises a regenerated acid medicine box (71) and a regenerated acid pump (72), wherein the regenerated acid medicine box (71) is communicated with the cation exchange mechanism (3) through a pipeline, an acidic regenerating agent is arranged in the regenerated acid medicine box (71), and the regenerated acid pump (72) is arranged on the pipeline between the regenerated acid medicine box (71) and the cation exchange mechanism (3) and is used for conveying the acidic regenerating agent in the regenerated acid medicine box (71) to the cation exchange mechanism (3).
8. The system for recycling chromium-containing wastewater from electrotinning passivation according to claim 1, which is characterized in that: the alkali adding mechanism (8) comprises a regenerated alkali medicine box (81) and a regenerated alkali pump (82), the regenerated alkali medicine box (81) is communicated with the anion exchange mechanism (4) through a pipeline, an alkaline regenerant is arranged in the regenerated alkali medicine box (81), and the regenerated alkali pump (82) is arranged on the pipeline between the regenerated alkali medicine box (81) and the anion exchange mechanism (4) and is used for conveying the alkaline regenerant in the regenerated alkali medicine box (81) to the anion exchange mechanism (4).
9. The system for recycling chromium-containing wastewater from electrotinning passivation according to claim 1, which is characterized in that: an evaporation and concentration mechanism (9) which can be used for carrying out evaporation and concentration on the chromium recovery solution flowing out of the anion exchange mechanism (4) is arranged between the anion exchange mechanism (4) and the chromium recovery container (6).
10. The system for recycling chromium-containing wastewater from electrotinning passivation according to claim 1, which is characterized in that: the device is characterized by further comprising a plurality of groups of wastewater monitoring systems (10) which are arranged on the pipeline and used for detection, wherein the wastewater monitoring systems (10) are formed by connecting one or more of a pressure gauge, a flow meter, an on-line conductivity monitor and a pH meter in series.
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| CN112813429A (en) * | 2020-12-30 | 2021-05-18 | 苏州碧清源环保技术有限公司 | Passivating agent regeneration and reuse equipment and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112813429A (en) * | 2020-12-30 | 2021-05-18 | 苏州碧清源环保技术有限公司 | Passivating agent regeneration and reuse equipment and method |
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