CN211056766U - Chromium-containing passivation wastewater treatment system - Google Patents
Chromium-containing passivation wastewater treatment system Download PDFInfo
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- CN211056766U CN211056766U CN201921464233.1U CN201921464233U CN211056766U CN 211056766 U CN211056766 U CN 211056766U CN 201921464233 U CN201921464233 U CN 201921464233U CN 211056766 U CN211056766 U CN 211056766U
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- passivation
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- 238000002161 passivation Methods 0.000 title claims abstract description 54
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 47
- 239000011651 chromium Substances 0.000 title claims abstract description 47
- 238000004065 wastewater treatment Methods 0.000 title claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000002351 wastewater Substances 0.000 claims abstract description 73
- 150000001450 anions Chemical class 0.000 claims abstract description 70
- 238000004064 recycling Methods 0.000 claims abstract description 34
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 150000001768 cations Chemical class 0.000 claims description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- 229910001385 heavy metal Inorganic materials 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 11
- 238000011084 recovery Methods 0.000 claims description 5
- 239000006004 Quartz sand Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 10
- 229920005989 resin Polymers 0.000 description 10
- 239000007788 liquid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000008929 regeneration Effects 0.000 description 7
- 238000011069 regeneration method Methods 0.000 description 7
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000003729 cation exchange resin Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000003957 anion exchange resin Substances 0.000 description 3
- 238000011001 backwashing Methods 0.000 description 3
- 238000005246 galvanizing Methods 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003480 eluent Substances 0.000 description 2
- -1 hydroxyl ions Chemical class 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012492 regenerant Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- Treatment Of Water By Ion Exchange (AREA)
Abstract
The utility model discloses a contain chromium passivation effluent disposal system for the processing of passivation waste water, include: the water inlet end of the first anion exchanger is communicated with the passivation wastewater and is used for removing chromate ions in the passivation wastewater, the water outlet end of the first anion exchanger is communicated with a recycling tank, and the recycling tank is used for recycling the treated passivation wastewater for recycling. The utility model discloses compare handle through artifical barrelling outward transportation among the prior art, the outward transportation treatment cost that has significantly reduced, and waste water can cyclic utilization once more, is favorable to the using water wisely, has solved among the prior art chromium-containing waste water because chromium content exceeds standard must not discharge at will, the technical problem that outward transportation treatment cost is high.
Description
Technical Field
The utility model relates to a passivation waste water treatment technical field especially relates to a contain chromium passivation waste water treatment system.
Background
The galvanized and tinned strip steel has wide application, good corrosion resistance and difficult rustiness, and can keep bright appearance for a long time. The passivation treatment is a very important process for the post treatment of the galvanized and tinned strip steel, and mainly means that the strip steel after the galvanizing and tinning needs to be treated by chromic acid so as to cover a layer of chemical conversion film on the galvanizing and tinning and enable active metal to be in a passive state, namely the chromate passivation treatment of a zinc layer and a tin layer.
At present, chromium content of partial chromium-containing wastewater generated in the production process of a galvanizing process section and a tinning process section of a cold rolling production line exceeds the standard, and wastes such as heavy metal wastewater, sludge and the like cannot be discharged according to the regulation of a ring assessment requirement, so the chromium-containing wastewater is generally recycled to the production line by an evaporation device, but miscellaneous wastewater such as leakage, overflow, dripping and the like cannot be effectively treated, the chromium-containing wastewater can only be collected by a pit and then manually loaded into a barrel for outward transportation and treatment, and the outward transportation and treatment cost of the chromium-containing wastewater is extremely high.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a chromium-containing passivation wastewater treatment system, and solves the technical problems that in the prior art, chromium-containing wastewater cannot be discharged at will due to the over standard chromium content, and the outward transportation treatment cost is high.
The application provides the following technical scheme through an embodiment of the application:
a chromium-containing passivating wastewater treatment system for the treatment of passivating wastewater, comprising: the water inlet end of the first anion exchanger is communicated with the passivation wastewater, the first anion exchanger is used for removing chromate ions in the passivation wastewater, the water outlet end of the first anion exchanger is communicated with a recycling tank, and the recycling tank is used for recycling the treated passivation wastewater for recycling.
In one embodiment, a conductivity meter is connected to the pipe at the water outlet end of the first anion exchanger.
In one embodiment, the device further comprises a cation exchanger, wherein the water outlet end of the cation exchanger is communicated with the first anion exchanger, and the water inlet end of the cation exchanger is communicated with the passivation wastewater for removing heavy metal cations in the passivation wastewater.
In one embodiment, a PH meter is connected to the conduit at the water outlet end of the cation exchanger.
In one embodiment, the system further comprises a second anion exchanger, wherein the water inlet end of the second anion exchanger is communicated with the water outlet end of the first anion exchanger, and the water outlet end of the second anion exchanger is communicated with the recovery tank.
In one embodiment, the device further comprises an activated carbon filter element filter, wherein the activated carbon filter element filter is arranged between the second anion exchanger and the recovery tank and is used for adsorbing grease and residual heavy metal cations in the passivated wastewater.
In one embodiment, the device further comprises a water inlet filter, wherein the water outlet end of the water inlet filter is communicated with the water inlet end of the cation exchanger, and the water inlet end of the water inlet filter is communicated with the passivating waste water for trapping suspended matters in water.
In one embodiment, the water inlet filter comprises a first stage filter and a second stage filter connected with the outlet of the first stage filter, the first stage filter is a mechanical filter made of quartz sand materials, and the second stage filter is a filter element filter with 5 micron pore size.
In one embodiment, the device further comprises a variable-frequency high-pressure water pump and a flow meter, wherein the variable-frequency high-pressure water pump and the flow meter are arranged on a pipeline between the passivated wastewater and the water inlet filter, the conductivity meter is connected with a P L C controller, the PH meter is connected with the P L C controller, and the flow meter and the variable-frequency high-pressure water pump are connected with the P L C controller.
In one embodiment, the recycling tank is communicated with the water inlet filter, the cation exchanger, the first anion exchanger, the second anion exchanger and the activated carbon filter element filter respectively, and the water inlet filter, the cation exchanger, the first anion exchanger, the second anion exchanger and the activated carbon filter element filter are communicated with a waste liquid tank.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
after the chromium-containing passivation wastewater generated in the passivation link is treated by the first anion exchanger, chromate ions in the passivation wastewater are removed, and the treated passivation wastewater is stored in a recycling tank for recycling. The heavy metal chromium content in the passivation waste water treated by the first anion exchanger can be removed, and the treated waste water is stored by the recovery box for recycling, compared with the prior art in which the waste water is manually barreled and transported outside, the method greatly reduces the transportation treatment cost, recycles the waste water, is favorable for saving water, achieves the purposes of energy conservation and emission reduction, and solves the technical problems that the chromium-containing waste water in the prior art cannot be discharged at will due to the over standard chromium content, and the transportation treatment cost is high.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a system for treating wastewater containing chromium passivation according to a preferred embodiment of the present invention.
Detailed Description
The embodiment of the application provides a chromium-containing passivation wastewater treatment system, and solves the technical problems that in the prior art, chromium-containing wastewater cannot be discharged at will due to the over standard chromium content, and the outward transportation treatment cost is high.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a chromium-containing passivating wastewater treatment system for the treatment of passivating wastewater, comprising: the water inlet end of the first anion exchanger is communicated with the passivation wastewater, the first anion exchanger is used for removing chromate ions in the passivation wastewater, the water outlet end of the first anion exchanger is communicated with a recycling tank, and the recycling tank is used for recycling the treated passivation wastewater for recycling.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example one
As shown in FIG. 1, the present example provides a system for treating chromium-containing passivation wastewater, which is used for treating passivation wastewater and comprises:
the water inlet end of the first anion exchanger 105 is communicated with the passivation wastewater, the first anion exchanger is used for removing chromate ions in the passivation wastewater, the water outlet end of the first anion exchanger 105 is communicated with a recycling tank 109, and the recycling tank 109 is used for recycling the treated passivation wastewater for recycling.
In the practical implementation process, the main sources of the chromium-containing passivation wastewater are miscellaneous discharge wastewater leaked by leakage, wastewater generated by equipment washing or ground washing, and the chromium-containing wastewater generated by regional washing and the like is stored in a wastewater tank 101 through a water collecting tank and a water pump and is conveyed to a chromium-containing passivation wastewater treatment system for treatment through the water pump.
Specifically, the anion exchange resin used in the first anion exchanger 105 is D301 macroporous weak base benzene JNHUYJ exchange resin, and chromate (CrO) in the wastewater is treated by the anion exchange resin4 2-) The ion is exchanged into hydroxyl ions, and the ion exchange is carried out,to realize chromate radical (CrO)4 2-) The removal of (2) ensures that the resin can be operated under conditions of strong oxidizing property and containing organic matters, and the proportion of chromate in the resin to the exchange water is higher than that of the common anion resin.
As an alternative embodiment, a conductivity meter is connected to the pipe at the water outlet end of the first anion exchanger 105.
The conductivity meter is used for detecting the electrical failure conductivity of the water treated by the first anion exchanger 105, realizing the detection of the salt content in the water and judging whether the anion resin of the first anion exchanger 105 needs to be replaced or regenerated.
Specifically, when the conductivity meter measures the electrical failure conductivity (higher than 70 mus/cm) of the first anion exchanger 105, the conductivity meter can give an alarm, and can also be externally connected with a P L C controller to send an alarm signal, at this time, the alarm device can be an HMI touch screen operation unit, the alarm content is used for prompting that the first anion exchanger 105 needs to be regenerated or replaced.
As an optional embodiment, the device further comprises a cation exchanger 104, wherein the water outlet end of the cation exchanger 104 is communicated with the first anion exchanger 105, and the water inlet end of the cation exchanger 104 is communicated with the passivation wastewater for removing heavy metal cations in the passivation wastewater.
Specifically, the cation exchange resin used in the cation exchanger 104 is 732 type strong acid styrene cation exchange resin, and metal ions such as calcium, magnesium, sodium, potassium, iron, copper and the like in the wastewater are exchanged into hydrogen ions through the cation exchange resin, so that the heavy metal ions are removed. The eluate generated by the regeneration of the cation exchanger 104 is stored in a waste liquid tank, is barreled by a pump, and is transported to an outside for disposal.
As an alternative embodiment, a pH meter is connected to the pipe at the water outlet end of the cation exchanger 104.
Specifically, when the PH value of the water discharged by the cation exchanger 104 is close to 5 measured by the PH meter, the exchange is stopped, the exchange can be carried out, an alarm can be given by the PH meter, an external P L C controller can also send an alarm signal, at the moment, the alarm device can be an HMI touch screen operation unit, the alarm content is used for prompting that the cation exchanger 104 needs to be regenerated or replaced, in the embodiment, the chromium-containing passivation wastewater treatment system further comprises an acid regeneration device 103, and the acid regeneration device 103 uses 4% HC L or 1-4% H2SO4The solution (2) is used as a regenerant for the cation exchange resin to convert the salt-type resin having adsorbed metal ions into H again+The pH value of water discharged from the cation exchanger 104 is controlled within the range of 2.3-5, and the eluent discharged after cation resin regeneration contains metal ions such as calcium, magnesium, sodium, potassium, iron, etc., and is discharged into a waste liquid tank, and is barreled by a pump and then is transported to the outside for treatment.
As an alternative embodiment, the system also comprises a second anion exchanger 107, wherein the water inlet end of the second anion exchanger 107 is communicated with the water outlet end of the first anion exchanger 105, and the water outlet end of the second anion exchanger 107 is communicated with the recycling tank 109.
Specifically, the cation resin used in the second anion exchanger 107 is D202 macroporous type ii strongly basic styrene anion exchange resin, which can remove salt components in water to form colloidal resin salt to be adsorbed on the second anion exchanger 107, thereby ensuring the conductivity of the effluent.
As an alternative embodiment, a conductivity meter is connected to the pipe at the water outlet end of the second anion exchanger 107. The conductivity meter is used for detecting the electrical failure conductivity of the water treated by the second anion exchanger 107, detecting the salt content in the water, and judging whether the anion resin of the second anion exchanger 107 needs to be replaced or regenerated.
Specifically, when the conductivity meter measures the electrical failure conductivity (higher than 15 mus/cm) of the second anion exchanger 107, the conductivity meter can alarm itself, and can also be externally connected with a P L C controller to send out an alarm signal, at this time, the alarm device can be an HMI touch screen operation unit, the alarm content is used for prompting that the second anion exchanger 107 needs to be regenerated or replaced, in the embodiment, the chromium-containing passivation wastewater treatment system further comprises an alkali regeneration device 106, the alkali regeneration device 106 is a 2-4% NaOH solution, the second anion exchanger 107 is regenerated for 3 minutes, and an eluent generated by regeneration of the second anion exchanger 107 is stored in a waste liquid tank and is transported out after being barreled by a pump.
As an optional embodiment, the system further comprises an activated carbon filter element 108, wherein the activated carbon filter element 108 is arranged between the second anion exchanger 107 and the recycling tank 109, and is used for adsorbing grease and residual heavy metal cations in the passivated wastewater. Heavy metals and oils in water are adsorbed by the activated carbon to ensure the quality of effluent, and the effluent passing through the activated carbon filter element filter 108 is stored in the recycling tank 109.
As an optional embodiment, the system further comprises an inlet filter 102, wherein an outlet end of the inlet filter 102 is communicated with an inlet end of the cation exchanger 104, and an inlet end of the inlet filter 102 is communicated with the passivation wastewater for trapping suspended matters in water.
Chromium-containing wastewater discharged from a pit and the like is stored in a wastewater tank 101 through a water collecting tank and a water pump, and then is conveyed to a water inlet filter 102 through the water pump to intercept suspended matters in water, so that part of impurities are shielded, the water treatment difficulty is reduced, and the water outlet purity is improved.
As an alternative embodiment, the water inlet filter 102 includes a first stage filter and a second stage filter connected to the outlet of the first stage filter, the first stage filter is a mechanical filter made of quartz sand material, and the second stage filter is a 5 μm pore size filter element.
As an optional embodiment, the system further comprises a variable frequency high pressure water pump and a flow meter, wherein the variable frequency high pressure water pump and the flow meter are both arranged on a pipeline between the passivated wastewater and the water inlet filter 102;
the conductivity meter is connected with a P L C controller, the PH meter is connected with the P L C controller, and the flow meter and the variable-frequency high-pressure water pump are connected with the P L C controller.
The conductivity meter and the PH meter are both connected with the P L C controller, the P L C controller can adjust the flow of the chromium-containing wastewater entering the device according to the high-pressure water pump with equivalent variable frequency control of the PH value and the conductivity of the treated water, and the treatment efficiency is improved by monitoring through the flow meter.
In addition, the chromium-containing passivation wastewater treatment system also comprises an HMI touch screen operation unit which is used for displaying and operating.
As an alternative embodiment, the recycling tank 109 is connected to the feed water filter 102, the cation exchanger 104, the first anion exchanger 105, the second anion exchanger 107, and the activated carbon filter 108, respectively, and the feed water filter 102, the cation exchanger 104, the first anion exchanger 105, the second anion exchanger 107, and the activated carbon filter 108 are connected to a waste liquid tank 110.
In the practical implementation process, the effluent filtered by the activated carbon filter element filter 108 is stored in the recycling tank 109, one part of the effluent is conveyed to the production line by a water pump to be recycled as pure water, the other part of the effluent is backwashing water (backwashing water) provided by the water inlet filter 102, the cation exchanger 104, the first anion exchanger 105, the second anion exchanger 107 and the activated carbon filter element filter 108, and the quality of the waste liquid generated by backwashing is good, and the part of the waste liquid is stored in the waste liquid tank 110 and then is lifted back to the original water tank by the water pump so as to reduce the outward transportation amount of the waste liquid.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
after the chromium-containing passivation wastewater generated in the passivation link is treated by the first anion exchanger, chromate ions in the passivation wastewater are removed, and the treated passivation wastewater is stored in a recycling tank for recycling. The heavy metal chromium content of the passivation waste water processed by the first anion exchanger can be removed, and the processed waste water is stored by the recycling bin for recycling, compared with the prior art in which the waste water is manually barreled and transported outside, the method greatly reduces the transportation cost, recycles the waste water, is favorable for saving water, and solves the technical problems that the chromium-containing waste water in the prior art cannot be discharged at will due to the over standard chromium content and the transportation cost is high.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A chromium-containing passivation wastewater treatment system for the treatment of passivation wastewater, comprising:
the water inlet end of the first anion exchanger is communicated with the passivation wastewater, the first anion exchanger is used for removing chromate ions in the passivation wastewater, the water outlet end of the first anion exchanger is communicated with a recycling tank, and the recycling tank is used for recycling the treated passivation wastewater for recycling.
2. The chromium-containing passivated wastewater treatment system of claim 1 wherein the conduit at the outlet end of the first anion exchanger is connected to a conductivity meter.
3. The chromium-containing passivation wastewater treatment system as claimed in claim 2, further comprising a cation exchanger, wherein the water outlet end of the cation exchanger is communicated with the first anion exchanger, and the water inlet end of the cation exchanger is communicated with the passivation wastewater for removing heavy metal cations in the passivation wastewater.
4. The chromium-containing passivated wastewater treatment system of claim 3 wherein the conduit at the outlet end of the cation exchanger is connected to a PH meter.
5. The chromium-containing passivation wastewater treatment system as claimed in claim 4, further comprising a second anion exchanger, wherein the water inlet end of the second anion exchanger is communicated with the water outlet end of the first anion exchanger, and the water outlet end of the second anion exchanger is communicated with the recycling tank.
6. The chromium-containing passivated wastewater treatment system of claim 5 further comprising an activated carbon cartridge filter disposed between the second anion exchanger and the recovery tank for adsorbing grease and residual heavy metal cations in the passivated wastewater.
7. The chromium-containing passivating wastewater treatment system of claim 6, further comprising a water inlet filter, wherein a water outlet end of the water inlet filter is communicated with a water inlet end of the cation exchanger, and a water inlet end of the water inlet filter is communicated with the passivating wastewater for retaining suspended matters in water.
8. The chromium-containing passivated wastewater treatment system of claim 7 wherein the influent filter comprises a first filter stage, a second filter stage connected to the outlet of the first filter stage, the first filter stage being a mechanical filter of quartz sand material and the second filter stage being a 5 micron pore size cartridge filter.
9. The chromium-containing passivated wastewater treatment system of claim 8 further comprising a variable frequency high pressure water pump and a flow meter both disposed on the conduit between the passivated wastewater and the influent filter;
the conductivity meter is connected with a P L C controller, the PH meter is connected with the P L C controller, and the flow meter and the variable-frequency high-pressure water pump are connected with the P L C controller.
10. The chromium-containing passivated wastewater treatment system of claim 9 wherein the recovery tank is in communication with the influent filter, the cation exchanger, the first anion exchanger, the second anion exchanger, and the activated carbon cartridge filter, respectively, and the influent filter, the cation exchanger, the first anion exchanger, the second anion exchanger, and the activated carbon cartridge filter are in communication with a waste tank.
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| CN201921464233.1U CN211056766U (en) | 2019-09-04 | 2019-09-04 | Chromium-containing passivation wastewater treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921464233.1U CN211056766U (en) | 2019-09-04 | 2019-09-04 | Chromium-containing passivation wastewater treatment system |
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