CN206635167U - System for processing chrome-containing wastewater - Google Patents

System for processing chrome-containing wastewater Download PDF

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Publication number
CN206635167U
CN206635167U CN201720303938.XU CN201720303938U CN206635167U CN 206635167 U CN206635167 U CN 206635167U CN 201720303938 U CN201720303938 U CN 201720303938U CN 206635167 U CN206635167 U CN 206635167U
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sedimentation basin
chemicals dosing
reaction pond
solid
containing wastewater
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余章军
余爱霞
马立军
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Fujian Xihai Environmental Protection Technology Co., Ltd.
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Fujian Sunyu Sanitary Ware Technology Co Ltd
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Abstract

The utility model discloses a kind of system for processing chrome-containing wastewater, including pH regulating reservoirs, filter, cation resin exchange system, tank, the first solid-liquid separation system being sequentially communicated;The delivery port of the cation resin exchange system connects with the tank, and the stripping liquid outlet of the cation resin exchange system has stripping liquid reservoir, and the stripping liquid reservoir is communicated with the second solid-liquid separation system.System for processing chrome-containing wastewater of the present utility model can be effectively to Cr6+Separating treatment is carried out, there is the advantages of simple in construction, treatment effeciency is high, treatment effect is good.

Description

System for processing chrome-containing wastewater
Technical field
Technical field of waste water processing is the utility model is related to, in particular to a kind of system for processing chrome-containing wastewater.
Background technology
The source of electroplating wastewater is generally:(1) plating piece rinse water;(2) spent plating bath;(3) other waste water, including wash away car Between ground, scrub pole plate wash water, ventilation equipment condensed water, and due to coating bath seepage or operational administrative it is improper caused by " run, Emit, drip, leak " various tank liquors and draining;(4) component cooling water, cooling water in use except temperature raise in addition to, not by To pollution.Process conditions, produce load, operational administrative and water use model that water quality, the water of electroplating wastewater produce with plating etc. Factor is relevant.The water quality of electroplating wastewater is complicated, and composition is difficult to control, wherein containing the heavy metals such as chromium, cadmium, nickel, copper, zinc, gold, silver Ion and cyanide etc., some belong to carcinogenic, teratogenesis, mutagenic extremely toxic substance.
Chromate waste water is most common one kind in electroplating wastewater, and chromate waste water main component is sulfuric acid and Cr6+, in addition to it is few Other metal ions such as Cu of amount2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Etc. one or more impurity.It is however, existing Some system for processing chrome-containing wastewater are complicated, and processing operating efficiency is low, poor processing effect, it is impossible to efficiently to Cr6+Divided From processing, and consumption is artificial, automaticity is low, and service life is short.Therefore, it is necessary to current system for processing chrome-containing wastewater It is improved.
Utility model content
In view of this, a kind of system for processing chrome-containing wastewater provided by the utility model, above-mentioned existing skill is preferably overcome The problem of art is present and defect, can be effectively to Cr6+Carry out separating treatment, have it is simple in construction, treatment effeciency is high, treatment effect The advantages of good.
A kind of system for processing chrome-containing wastewater, including be sequentially communicated pH regulating reservoirs, filter, cation resin exchange system System, tank, the first solid-liquid separation system;
The delivery port of the cation resin exchange system connects with the tank, the cation resin exchange system Stripping liquid outlet have stripping liquid reservoir, the stripping liquid reservoir is communicated with the second solid-liquid separation system.
Further, in addition to effluent storage pond, the effluent storage pond are connected by suction pump with the pH regulating reservoirs.
Further, first solid-liquid separation system include be sequentially communicated reduction reaction pond, the first precipitation reaction pond, First concentration film device, the first sedimentation basin, the first collecting pit, the first nanofiltration-micro-filtration combination unit, the first clear water reserviors;Described The concentrated water spout of one concentration film device connects with first sedimentation basin, the sludge outlet of first sedimentation basin be communicated with first from Scheming or filter press, the clean water outlet of the first concentration film device and the delivery port of first sedimentation basin are received with described first Ji Chi is connected, and the delivery port of first nanofiltration-micro-filtration combination unit connects with first clear water reserviors, and first nanofiltration- The sludge outlet of micro-filtration combination unit connects with first sedimentation basin, and the sludge outlet of first centrifuge or filter press connects It is connected with the first calcining furnace.
Further, second solid-liquid separation system includes the second precipitation reaction pond, the second concentration film being sequentially communicated Device, the second sedimentation basin, the second collecting pit, the second nanofiltration-micro-filtration combination unit, the second clear water reserviors;The second concentration film dress The concentrated water spout put connects with second sedimentation basin, and the sludge outlet of second sedimentation basin is communicated with the second centrifuge or press filtration Machine, the clean water outlet of the second concentration film device and the delivery port of second sedimentation basin connect with second collecting pit, The delivery port of second nanofiltration-micro-filtration combination unit connects with second clear water reserviors, second nanofiltration-micro-filtration combination dress The sludge outlet put connects with second sedimentation basin, and the sludge outlet of second centrifuge or filter press is communicated with second and forged Burn stove.
Further, first solid-liquid separation system also includes the first chemicals dosing plant connected with the reduction reaction pond With the second chemicals dosing plant, first chemicals dosing plant is used to add acidic materials, second dosing to the reduction reaction pond Device is used to add reducing agent to the reduction reaction pond;The reduction reaction pond is provided with the first pH monitoring devices and control of Electric potentials Instrument, the first pH monitoring devices are connected with first chemicals dosing plant, the control of Electric potentials instrument and second chemicals dosing plant Connection.
Further, first solid-liquid separation system also includes the 3rd dosing connected with the first precipitation reaction pond Device, the 3rd chemicals dosing plant are used to add alkaline matter to the precipitation reaction pond;The first precipitation reaction pond is provided with 2nd pH monitoring devices, the 2nd pH monitoring devices are connected with the 3rd chemicals dosing plant.
Further, second solid-liquid separation system also includes the 4th dosing connected with the second precipitation reaction pond Device, the 4th chemicals dosing plant are used to add alkaline matter to the second precipitation reaction pond;The second precipitation reaction pond Provided with the 3rd pH monitoring devices, the 3rd pH monitoring devices are connected with the 4th chemicals dosing plant.
Further, first sedimentation basin is connected by the first sludge reservoir with first centrifuge or filter press; The delivery port of first centrifuge or filter press connects with the described first concentration film device.
Further, second sedimentation basin is connected by the second sludge reservoir with second centrifuge or filter press; The delivery port of second centrifuge or filter press connects with the described second concentration film device.
Further, the cation resin exchange system includes some cation resin exchange devices.
Compared with prior art, the beneficial effect of system for processing chrome-containing wastewater of the present utility model is:
(1), system for processing chrome-containing wastewater of the present utility model by using cation resin exchange system effectively by Cr6+With Other metal ions such as Cu2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Separated etc. one or more impurity, Ran Houtong Solid-liquid separation system is crossed respectively to containing Cr6+Waste water and containing other metal ions such as Cu2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、 Cr3+、Ca2+Stripping liquid etc. one or more impurity carries out separation of solid and liquid processing, and treatment effeciency is high, and treatment effect is good.
(2), further, solid-liquid separation system of the present utility model by make in precipitation reaction pond the metal in waste water from Son precipitates with generation precipitation reaction generations such as alkaline matter such as sodium hydroxides, then is concentrated by concentration film device, makes precipitation particle Concentration aggregation thickening increase, accelerate precipitation, then separation of solid and liquid is carried out in sedimentation basin, the clear water collected in collecting pit passes through setting again After nanofiltration-micro-filtration combination unit carries out micro-filtration and nanofiltration double filtration, the micro tiny solid in clear water can be more thoroughly removed Suspension, the sediment being filtrated to get is drained into sedimentation basin in batches reprocesses, and the sediment in sedimentation basin is through centrifuge or pressure Filter is dehydrated, and obtained solid slag is without organic impurities such as PAC, PAM, and moisture content is relatively low, then by calcining furnace Calcination processing, obtained metal oxide and other compounds can not only recycle, and realize zero pollutant discharge, have Effect reduces Treatment of Sludge cost and load, and solves the problems, such as the wasting of resources, and greatly reduces being produced into for enterprise This, has very big social and economic benefit.
(3), further, solid-liquid separation system of the present utility model is by setting pH monitoring devices real in precipitation reaction pond When monitor reaction tank in pH value, and according to corresponding pH value control chemicals dosing plant Automatic Dosing, make the system automation degree It is high, safe for operation, stably, simple to operate, management is convenient and treatment effect is more preferable.
To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and Accompanying drawing appended by cooperation, is described in detail below.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also To obtain other related accompanying drawings according to these accompanying drawings.
Fig. 1 is the first structural representation of system for processing chrome-containing wastewater of the present utility model;
Fig. 2 is second of structural representation of the first solid-liquid separation system of the present utility model;
Fig. 3 is the third structural representation of the second solid-liquid separation system of the present utility model.
Drawing reference numeral explanation:
1- system for processing chrome-containing wastewater;100- effluent storages pond;200- suction pumps;300-pH regulating reservoirs;400- filtering dresses Put;500- cation resin exchange devices;600- tanks;The solid-liquid separation systems of 700- first;701- reduction reaction ponds;7011- First chemicals dosing plant;The chemicals dosing plants of 7012- second;The pH monitoring devices of 7013- the first;7014- control of Electric potentials instrument;702- first is heavy Shallow lake reaction tank;The chemicals dosing plants of 7021- the 3rd;The pH monitoring devices of 7022- the 2nd;703- first concentrates film device;704- first is heavy Shallow lake pond;The collecting pits of 705- first;The first nanofiltrations of 706--micro-filtration combination unit;The clear water reserviors of 707- first;The sludge of 708- first is store Pond;The centrifuges of 709- first or filter press;The calcining furnaces of 710- first;800- stripping liquid reservoirs;The solid-liquid separation systems of 900- second; The second precipitation reaction of 901- pond;The chemicals dosing plants of 9011- the 4th;The pH monitoring devices of 9012- the 3rd;902- second concentrates film device; The sedimentation basins of 903- second;The collecting pits of 904- second;The second nanofiltrations of 905--micro-filtration combination unit;The clear water reserviors of 906- second;907- Two sludge reservoirs;The centrifuges of 908- second or filter press;The calcining furnaces of 909- second.
Embodiment
For the ease of understanding the utility model, system for processing chrome-containing wastewater is carried out more comprehensively below with reference to relevant drawings Description.The preferred embodiment of system for processing chrome-containing wastewater is given in accompanying drawing.But system for processing chrome-containing wastewater can be with perhaps More different form is realized, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is to make To the disclosure more thorough and comprehensive of system for processing chrome-containing wastewater.
In description of the present utility model, it is to be understood that term " longitudinal direction ", " transverse direction ", " on ", " under ", " preceding ", The orientation or position relationship of the instruction such as " rear ", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " be based on Orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than instruction or dark Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right Limitation of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that referring to Show or imply relative importance.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term State and be not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be Combined in an appropriate manner in any one or more embodiments or example.
In description of the present utility model, unless otherwise prescribed with restriction, it is necessary to explanation, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be the company of mechanical communication or electric connection or two element internals It is logical, can be joined directly together, can also be indirectly connected by intermediary, for the ordinary skill in the art, can To understand the concrete meaning of above-mentioned term as the case may be.
Refering to Fig. 1, the utility model provides a kind of system for processing chrome-containing wastewater 1, including the pH regulating reservoirs being sequentially communicated 300th, filter 400, cation resin exchange system, tank 600, the first solid-liquid separation system 700.
The delivery port of the cation resin exchange system connects with the tank 600, the cation resin exchange The stripping liquid outlet of system has stripping liquid reservoir 800, and the stripping liquid reservoir 800 is communicated with the second solid-liquid separation system 900。
It is to be appreciated that the filter 400 is used to filter out the impurity such as the solid particulate matter in chromate waste water, keep away Exempt from the absorption property of influence postorder cation resin exchange system cationic exchanger resin.The filter 400 can be enumerated For quartz filter, active carbon filter, ceramic filter, more medium filter or fabric filter etc..
It should be noted that cation resin exchange system includes regenerating unit (not shown).Described the utility model Cation resin exchange system in by the way that cationic ion-exchange resin is loaded in cation resin exchange device 500, for inhaling It is attached to remove Cr6+Other metal ions such as Cu in addition2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Deng one or more miscellaneous Matter, so as to by Cr6+With other metal ions such as Cu2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Deng one or more miscellaneous Matter separates.Containing Cr6+Waste water be discharged into by delivery port in tank 600;And other metal ions such as Cu is adsorbed2+、Ni2+、 Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Cationic ion-exchange resin etc. one or more impurity enters regenerating unit by desorption And regenerative process, make resin regeneration, the obtained such as Cu containing other metal ions2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2 +Stripping liquid etc. one or more impurity is drained into stripping liquid reservoir 800 by stripping liquid outlet.
It is understood that first solid-liquid separation system 700 is used to be discharged into tank 600 to contain Cr6+It is useless Water carries out separation of solid and liquid;Second solid-liquid separation system 900 be used for be discharged into stripping liquid reservoir 800 containing other metals from Son such as Cu2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Stripping liquid etc. one or more impurity carries out separation of solid and liquid.
Preferably, system for processing chrome-containing wastewater 1 of the present utility model also includes effluent storage pond 100, the effluent storage Pond 100 is connected by suction pump 200 with the pH regulating reservoirs 300.
Preferably, as shown in Fig. 2 in the utility model embodiment, first solid-liquid separation system 700 includes connecting successively Logical reduction reaction pond 701, the first precipitation reaction pond 702, first concentration film device 703, the first sedimentation basin 704, first are collected Pond 705, the first nanofiltration-micro-filtration combine the unit the 706, first clear water reserviors 707;It is described first concentration film device 703 concentrated water spout with First sedimentation basin 704 connects, and the sludge outlet of first sedimentation basin 704 is communicated with the first centrifuge or filter press 709, It is described first concentration film device 703 clean water outlet and first sedimentation basin 704 delivery port with first collecting pit 705 Connection, the delivery port of first nanofiltration-micro-filtration combination unit 706 connect with first clear water reserviors 707, and described first receives The sludge outlet of filter-micro-filtration combination unit 706 connects with first sedimentation basin 704, first centrifuge or filter press 709 Sludge outlet be communicated with the first calcining furnace 710.
Utilized in above-mentioned reduction reaction pond 701 and add reducing agent by the Cr in waste water6+It is reduced to Cr3+, the reducing agent can arrange Lift as sodium sulfite, sodium pyrosulfite or sodium hydrogensulfite etc..Illustrated as one kind, when reducing agent is sodium sulfite, Specifically reduction reaction formula is:4Cr6++3S2O5 2-+9H2O=4Cr3++6SO4 2-+18H+, the reducing agent dosage of the present embodiment is slightly larger than The theoretical amount of reaction, it is easy to occur sufficiently to react.
Preferably, first solid-liquid separation system 700 also includes the first dosing connected with the reduction reaction pond 701 The chemicals dosing plant 7012 of device 7011 and second, first chemicals dosing plant 7011 are used to add acid to the reduction reaction pond 701 Property material, second chemicals dosing plant 7012 is used to the reduction reaction pond 701 add reducing agent;The reduction reaction pond 701 are provided with the first pH monitoring devices 7013 and control of Electric potentials instrument 7014, and the first pH monitoring devices 7013 add with described first Medicine device 7011 is connected, and the control of Electric potentials instrument 7014 is connected with second chemicals dosing plant 7012.
It should be noted that to ensure that reduction reaction reaches optimum efficiency in reduction reaction pond 701, i.e., thoroughly by waste water Cr6+It is reduced to Cr3+, the pH value in reaction tank need to reach 2.5~3.0.Therefore by setting the in the utility model embodiment One pH monitoring devices 7013 are used for the pH value for monitoring waste water in the reduction reaction pond 701 in real time, when the pH value monitored is more than When 3.0, the first pH monitoring devices 7013 automatically control first chemicals dosing plant 7011 and added into reduction reaction pond 701 Acidic materials;When the pH value monitored is less than 2.5, the first pH monitoring devices 7013 automatically control the first dosing dress Put 7011 and stop addition acidic materials into reduction reaction pond 701.The acidic materials can be enumerated as sulfuric acid or hydrochloric acid etc..
It should be noted that to ensure that reduction reaction reaches optimum efficiency in reduction reaction pond 701, i.e., thoroughly by waste water Cr6+It is reduced to Cr3+, the current potential in reaction tank need to be controlled in 220~270mV.Therefore by setting in the utility model embodiment The current potential that control of Electric potentials instrument 7014 (ORP meters) is used to monitor waste water in the reduction reaction pond 701 in real time is put, when the electricity monitored When position is higher than 270mV, the control of Electric potentials instrument 7014 (ORP meters) automatically controls second chemicals dosing plant 7012 to reduction reaction Reducing agent is added in pond 701;When the pH value monitored is less than 220mV, the control of Electric potentials instrument 7014 (ORP meters) automatically controls Second chemicals dosing plant 7012 stops adding reducing agent into reduction reaction pond 701.
By containing Cr by what is obtained after reduction reaction pond 701 reduces in above-mentioned first precipitation reaction pond 7023+Waste water PH value is adjusted into certain limit, utilizes alkaline matter and Cr3+Reaction generation Cr (OH)3Precipitation, to remove the Cr in waste water3+。 The alkaline matter is preferably sodium hydroxide, and certain alkaline matter can also be enumerated as the mixture of lime or lime and sodium hydroxide Deng.Specifically reaction equation is:Cr3++3OH-=Cr (OH)3↓。
Preferably, first solid-liquid separation system 700 also includes the 3rd connected with the first precipitation reaction pond 702 Chemicals dosing plant 7021, the 3rd chemicals dosing plant 7021 are used to add alkaline matter to the precipitation reaction pond;Described first is heavy Shallow lake reaction tank 702 is provided with the 2nd pH monitoring devices 7022, the 2nd pH monitoring devices 7022 and the 3rd chemicals dosing plant 7021 connections.
It should be noted that to ensure that reaction reaches optimum efficiency in the first precipitation reaction pond 702, i.e., alkaline matter with Cr3+React completely, the pH value in reaction tank need to be controlled between 10~11.5.Therefore setting is passed through in the utility model embodiment 2nd pH monitoring devices 7022 are used for the pH value for monitoring waste water in the first precipitation reaction pond 702 in real time, as the pH monitored When value is less than 10, the 2nd pH monitoring devices 7022 automatically control the 3rd chemicals dosing plant 7021 to the first precipitation reaction pond Alkaline matter is added in 702;When the pH value monitored is more than, the 3rd pH monitoring devices 9012 automatically control the described 4th Chemicals dosing plant 9011 stops adding alkaline matter into the first precipitation reaction pond 702.
Preferably, as shown in figure 3, in the utility model embodiment, second solid-liquid separation system 900 includes connecting successively Logical second precipitation reaction pond 901, second concentration film device 902, the second sedimentation basin 903, the second collecting pit 904, the second nanofiltration- Micro-filtration combines the unit the 905, second clear water reserviors 906;The concentrated water spout and second sedimentation basin of the second concentration film device 902 903 connections, the sludge outlet of second sedimentation basin 903 are communicated with the second centrifuge or filter press 908, the second concentration film The delivery port of the clean water outlet of device 902 and second sedimentation basin 903 connects with second collecting pit 904, and described second The delivery port of nanofiltration-micro-filtration combination unit 905 connects with second clear water reserviors 906, second nanofiltration-micro-filtration combination unit 905 sludge outlet connects with second sedimentation basin 903, the sludge outlet connection of second centrifuge or filter press 908 There is the second calcining furnace 909.
By the way that other metal ions such as Cu will be contained in above-mentioned first precipitation reaction pond 7022+、Ni2+、Co2+、Fe3+、Zn2+、Fe2 +、Cr3+、Ca2+Etc. one or more impurity waste water pH value regulation in certain limit, while using alkaline matter with it is other Metal ion such as Cu2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Generation metal hydroxides is reacted Deng one or more Precipitation, to remove other metal ions such as Cu in waste water2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Deng a kind of or more Kind impurity.The alkaline matter is preferably sodium hydroxide, and certain alkaline matter can also be enumerated as lime or lime and sodium hydroxide Mixture etc..Specific reaction equation can be listed below:
Cu2++2OH-=Cu (OH)2↓;
Ni2++2OH-=Ni (OH)2↓。
Preferably, second solid-liquid separation system 900 also includes the 4th connected with the second precipitation reaction pond 901 Chemicals dosing plant 9011, the 4th chemicals dosing plant 9011 are used to add alkaline matter to the second precipitation reaction pond 901;It is described Second precipitation reaction pond 901 is provided with the 3rd pH monitoring devices 9012, the 3rd pH monitoring devices 9012 and the 4th dosing Device 9011 connects.
The 3rd pH monitoring devices 9012 are identical with the operation principle of above-mentioned 2nd pH monitoring devices 7022, that is, are used for real When monitor pH value in the second precipitation reaction pond 901, and according to corresponding pH value control the 4th chemicals dosing plant 9011 start or Stopping adds alkaline matter.
The first concentration film device 703 and the second concentration film device 902 can be enumerated as high pressure counter-infiltration rolling Film or high pressure counter-infiltration disc type film or vibrating membrane or forward osmosis membrane.The first concentration film device 703 and the second concentration film Device 902 can also be enumerated as NF membrane, milipore filter, microfiltration membranes or in general filtration core etc..In film device is concentrated, pass through film Separation, hydroxide precipitation particle is set further to concentrate aggregation thickening increase.
Preferably, first sedimentation basin 704 passes through the first sludge reservoir 708 and first centrifuge or filter press 709 connections;The delivery port of first centrifuge or filter press 709 connects with the described first concentration film device 703.
Preferably, second sedimentation basin 903 passes through the second sludge reservoir 907 and second centrifuge or filter press 908 connections;The delivery port of second centrifuge or filter press 908 connects with the described second concentration film device 902.
It is to be appreciated that above-mentioned sludge reservoir is used for the sludge that the sludge outlet in settlement on storage pond is discharged, and accumulating To centrifuge is conveyed to after a certain amount of or filter press carries out dehydration separation, sedimentation basin is avoided intermittently to provide sludge to centrifuge Or filter press, influence the service life of centrifuge or filter press.
The solid-liquid separation system of the utility model embodiment after centrifuge or filter press carry out dehydration separation by will obtain The Sewage treatment arrived is realized the secondary recovery processing of the waste water and utilized, reduce exhaust emission to concentration film device.
Preferably, the cation resin exchange system includes some cation resin exchange devices 500.Can be according to actual need The chromate waste water treating capacity of processing is arranged to 2 or 3 cation resin exchange devices 500 in parallel or series etc., makes Cr6+With it Its metal ion such as Cu2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Opened etc. one or more separated from impurities.It is preferred that Ground, in the utility model embodiment, the cation resin exchange system includes the cation resin exchange devices 500 of 2 series connection.
The technological process of system for processing chrome-containing wastewater 1 of the present utility model is:
As shown in figure 1, the chromate waste water in effluent storage pond 100 is pumped into pH regulating reservoirs 300 by suction pump 200, PH to 3.0~7.0 is adjusted, is filtered by filter 400, removes the impurity such as solid particulate matter in chromate waste water, filtered fluid is again Cation resin exchange device 500 by two series connection carries out ion exchange, by the Cr in waste water6+With other metal ions such as Cu2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Separated etc. one or more impurity.Containing Cr6+Waste water pass through water outlet Mouth is discharged into tank 600, and has adsorbed other metal ions such as Cu2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Deng The cationic ion-exchange resin of one or more impurity makes resin regeneration, what is obtained contains other metals by desorption and regenerative process Ion such as Cu2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Stripping liquid etc. one or more impurity is gone out by stripping liquid Mouth is drained into stripping liquid reservoir 800.
As shown in Fig. 2 being discharged into tank 600 includes Cr6+Waste water it is anti-by the reduction in the first solid-liquid separation system 700 Pond 701 is answered, by the Cr in waste water6+It is reduced into Cr3+Afterwards, generation Cr (OH) is reacted by the first precipitation reaction pond 7023Precipitation, then Concentrated by the first concentration film device 703, make Ni (OH)2Precipitate particulate condensation aggregation thickening increase;Subsequently into the first precipitation Separation of solid and liquid is carried out in pond 704, obtained supernatant is discharged in the first collecting pit 705 by the delivery port of the first sedimentation basin 704; Sediment is discharged in the first sludge reservoir 708 by the sludge outlet of the first sedimentation basin 704, is treated in the first sludge reservoir 708 Sludge quantity reaches a certain amount of, is extracted into the first centrifuge through sludge pump (not shown) or filter press 709 carries out dehydration separation, obtain To Sewage treatment to first concentration film device 703 in continue after-treatment, obtained solid slag automatic transport is forged to first Burn direct high-temperature calcination in stove 710 or intermittently carry out calcination processing after placing, obtain the higher chromium oxide of purity.One can also be entered Step ground is passed through hydrogen and nitrogen in the first calcining furnace 710 to be continued chromium oxide to be reduced into simple substance chromium, finally by chromium or chromium oxide Recycle.And the supernatant collected in the first collecting pit 705 further removes by the first nanofiltration-micro-filtration combination unit 706 again The micro tiny solid suspension gone in the first collecting pit 705 in the supernatant collected, the sediment being filtrated to get are arranged in batches Enter into the first sedimentation basin 704 and continue after-treatment, filter water is discharged into the first clear water reserviors 707 and recycled.
As shown in figure 3, such as Cu containing other metal ions being discharged into stripping liquid reservoir 8002+、Ni2+、Co2+、Fe3+、Zn2+、 Fe2+、Cr3+、Ca2+Stripping liquid etc. one or more impurity carries out separation of solid and liquid by the second solid-liquid separation system 900, first passes through The second precipitation reaction pond 901 reaction generation precipitate metal hydroxides are crossed, then are concentrated by the second concentration film device 902, make gold Belong to hydroxide precipitation particulate condensation aggregation thickening increase;Subsequently into separation of solid and liquid is carried out in the second sedimentation basin 903, obtain Supernatant is discharged in the second collecting pit 904 by the delivery port of the second sedimentation basin 903;Sediment passes through the second sedimentation basin 903 Sludge outlet is discharged in the second sludge reservoir 907, treats that the sludge quantity in the second sludge reservoir 907 reaches a certain amount of, through sludge pump (not shown) is extracted into the second centrifuge or filter press 908 carries out dehydration separation, obtained Sewage treatment to the second concentration film Continue after-treatment in device 902, obtained solid slag automatic transport into the second calcining furnace 909 direct high-temperature calcination or Calcination processing is intermittently carried out after placement, obtains metal oxide and the mixture of compound, finally by metal oxide and chemical combination The mixture of thing recycles.And the supernatant collected in the second collecting pit 904 is again by the second nanofiltration-micro-filtration combination unit 905 further remove the micro tiny solid suspension in the supernatant collected in the second collecting pit 904, and what is be filtrated to get is heavy Starch is drained into the second sedimentation basin 903 in batches continues after-treatment, and filter water is discharged into the second clear water reserviors 906 and recycled.
In summary, the beneficial effect of system for processing chrome-containing wastewater of the present utility model is:
(1), system for processing chrome-containing wastewater of the present utility model by using cation resin exchange system effectively by Cr6+With Other metal ions such as Cu2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、Cr3+、Ca2+Separated etc. one or more impurity, Ran Houtong Solid-liquid separation system is crossed respectively to containing Cr6+Waste water and containing other metal ions such as Cu2+、Ni2+、Co2+、Fe3+、Zn2+、Fe2+、 Cr3+、Ca2+Stripping liquid etc. one or more impurity carries out separation of solid and liquid processing, and treatment effeciency is high, and treatment effect is good.
(2), further, solid-liquid separation system of the present utility model by make in precipitation reaction pond the metal in waste water from Son precipitates with generation precipitation reaction generations such as alkaline matter such as sodium hydroxides, then is concentrated by concentration film device, makes precipitation particle Concentration aggregation thickening increase, accelerate precipitation, then separation of solid and liquid is carried out in sedimentation basin, the clear water collected in collecting pit passes through setting again After nanofiltration-micro-filtration combination unit carries out micro-filtration and nanofiltration double filtration, the micro tiny solid in clear water can be more thoroughly removed Suspension, the sediment being filtrated to get is drained into sedimentation basin in batches reprocesses, and the sediment in sedimentation basin is through centrifuge or pressure Filter is dehydrated, and obtained solid slag is without organic impurities such as PAC, PAM, and moisture content is relatively low, then by calcining furnace Calcination processing, obtained metal oxide and other compounds can not only recycle, and realize zero pollutant discharge, have Effect reduces Treatment of Sludge cost and load, and solves the problems, such as the wasting of resources, and greatly reduces being produced into for enterprise This, has very big social and economic benefit.
(3), further, solid-liquid separation system of the present utility model is by setting pH monitoring devices real in precipitation reaction pond When monitor reaction tank in pH value, and according to corresponding pH value control chemicals dosing plant Automatic Dosing, make the system automation degree It is high, safe for operation, stably, simple to operate, management is convenient and treatment effect is more preferable.
Although more above used the term for representing structure, such as " the first precipitation reaction pond ", " the first concentration film dress Put ", " the first pH monitoring devices " etc., but be not precluded from the possibility using other terms.It is used for the purpose of using these terms More easily describe and explain essence of the present utility model;Being construed as any additional limitation is all and this practicality What new spirit was disagreed.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to In this, any one skilled in the art can readily occur in change in the technical scope that the utility model discloses Or replace, it should all cover within the scope of protection of the utility model.

Claims (10)

  1. A kind of 1. system for processing chrome-containing wastewater, it is characterised in that:Including pH regulating reservoirs, filter, the cation being sequentially communicated Resins exchange system, tank, the first solid-liquid separation system;
    The delivery port of the cation resin exchange system connects with the tank, the solution of the cation resin exchange system Imbibition outlet has stripping liquid reservoir, and the stripping liquid reservoir is communicated with the second solid-liquid separation system.
  2. 2. system for processing chrome-containing wastewater according to claim 1, it is characterised in that:Also include effluent storage pond, it is described useless Water storage pool is connected by suction pump with the pH regulating reservoirs.
  3. 3. system for processing chrome-containing wastewater according to claim 1, it is characterised in that:First solid-liquid separation system includes The reduction reaction pond that is sequentially communicated, the first precipitation reaction pond, the first concentration film device, the first sedimentation basin, the first collecting pit, first Nanofiltration-micro-filtration combination unit, the first clear water reserviors;The concentrated water spout of the first concentration film device connects with first sedimentation basin, The sludge outlet of first sedimentation basin is communicated with the first centrifuge or filter press, the clean water outlet of the first concentration film device and The delivery port of first sedimentation basin connects with first collecting pit, the water outlet of first nanofiltration-micro-filtration combination unit Mouth connects with first clear water reserviors, and sludge outlet and first sedimentation basin of first nanofiltration-micro-filtration combination unit connect Logical, the sludge outlet of first centrifuge or filter press is communicated with the first calcining furnace.
  4. 4. system for processing chrome-containing wastewater according to claim 1, it is characterised in that:Second solid-liquid separation system includes The second precipitation reaction pond for being sequentially communicated, the second concentration film device, the second sedimentation basin, the second collecting pit, the second nanofiltration-micro-filtration group Attach together put, the second clear water reserviors;The concentrated water spout of the second concentration film device connects with second sedimentation basin, second precipitation The sludge outlet in pond is communicated with the second centrifuge or filter press, the clean water outlet of the second concentration film device and second precipitation The delivery port in pond connects with second collecting pit, the delivery port and described second of second nanofiltration-micro-filtration combination unit Clear water reserviors connect, and the sludge outlet of second nanofiltration-micro-filtration combination unit connects with second sedimentation basin, described second from The sludge outlet of scheming or filter press is communicated with the second calcining furnace.
  5. 5. system for processing chrome-containing wastewater according to claim 3, it is characterised in that:First solid-liquid separation system also wraps The first chemicals dosing plant and the second chemicals dosing plant connected with the reduction reaction pond is included, first chemicals dosing plant is used for described Reduction reaction pond adds acidic materials, and second chemicals dosing plant is used to add reducing agent to the reduction reaction pond;It is described to go back Former reaction tank is provided with the first pH monitoring devices and control of Electric potentials instrument, and the first pH monitoring devices connect with first chemicals dosing plant Connect, the control of Electric potentials instrument is connected with second chemicals dosing plant.
  6. 6. system for processing chrome-containing wastewater according to claim 3, it is characterised in that:First solid-liquid separation system also wraps The 3rd chemicals dosing plant connected with the first precipitation reaction pond is included, the 3rd chemicals dosing plant is used for the precipitation reaction pond Add alkaline matter;The first precipitation reaction pond is provided with the 2nd pH monitoring devices, the 2nd pH monitoring devices and described the Three chemicals dosing plants connect.
  7. 7. system for processing chrome-containing wastewater according to claim 4, it is characterised in that:Second solid-liquid separation system also wraps The 4th chemicals dosing plant connected with the second precipitation reaction pond is included, the 4th chemicals dosing plant is used for anti-to the described second precipitation Ying Chi adds alkaline matter;The second precipitation reaction pond is provided with the 3rd pH monitoring devices, the 3rd pH monitoring devices and institute State the connection of the 4th chemicals dosing plant.
  8. 8. system for processing chrome-containing wastewater according to claim 3, it is characterised in that:First sedimentation basin is dirty by first Mud reservoir connects with first centrifuge or filter press;The delivery port of first centrifuge or filter press and described first dense Contracting film device connects.
  9. 9. system for processing chrome-containing wastewater according to claim 4, it is characterised in that:Second sedimentation basin is dirty by second Mud reservoir connects with second centrifuge or filter press;The delivery port of second centrifuge or filter press and described second dense Contracting film device connects.
  10. 10. system for processing chrome-containing wastewater according to claim 1, it is characterised in that:The cation resin exchange system Including some cation resin exchange devices.
CN201720303938.XU 2017-03-27 2017-03-27 System for processing chrome-containing wastewater Active CN206635167U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018177222A1 (en) * 2017-03-27 2018-10-04 福建欣宇卫浴科技股份有限公司 System and process for treating for wastewater containing chromium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018177222A1 (en) * 2017-03-27 2018-10-04 福建欣宇卫浴科技股份有限公司 System and process for treating for wastewater containing chromium

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Address before: 363107 Xingjing Road, Fulong Industrial Park, Zhangzhou Taiwanese Investment Zone, Fujian Province

Patentee before: FUJIAN SUNYU SANITARY WARE TECHNOLOGY CO., LTD.