CN108164052A - A kind of chrome waste liquid intelligent treatment device and processing method - Google Patents
A kind of chrome waste liquid intelligent treatment device and processing method Download PDFInfo
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- CN108164052A CN108164052A CN201711481963.8A CN201711481963A CN108164052A CN 108164052 A CN108164052 A CN 108164052A CN 201711481963 A CN201711481963 A CN 201711481963A CN 108164052 A CN108164052 A CN 108164052A
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- 239000002699 waste material Substances 0.000 title claims abstract description 178
- 239000007788 liquid Substances 0.000 title claims abstract description 173
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 238000003672 processing method Methods 0.000 title claims abstract description 17
- 238000001556 precipitation Methods 0.000 claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 44
- 238000002156 mixing Methods 0.000 claims abstract description 30
- 230000009467 reduction Effects 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000011651 chromium Substances 0.000 claims description 51
- 229910052804 chromium Inorganic materials 0.000 claims description 38
- 238000000926 separation method Methods 0.000 claims description 20
- 238000005868 electrolysis reaction Methods 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims 2
- 230000005611 electricity Effects 0.000 claims 1
- 239000013049 sediment Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 17
- 239000010808 liquid waste Substances 0.000 abstract description 6
- 239000000872 buffer Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229910001430 chromium ion Inorganic materials 0.000 description 6
- 230000007812 deficiency Effects 0.000 description 5
- 235000013399 edible fruits Nutrition 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical group O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- -1 i.e. Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention belongs to liquid waste disposal technique field more particularly to a kind of chrome waste liquid intelligent treatment devices and processing method.The present invention provides a kind of chrome waste liquid intelligent treatment device, including：Control unit, detection unit, waste collection unit, pH adjust unit, reduction unit, alkalization mixed cell, precipitation unit and filter element alkalization mixed control unit and chrome waste liquid are controlled to flow into pH adjusting units or alkalization mixed cell according to testing result, and alkalization mixed control unit controls chrome waste liquid in the flowing velocity of each component according to testing result.The present invention also provides a kind of method for treating waste liquid of the chrome waste liquid intelligent treatment device including one alkalization mixing of any of the above.In the present invention, the flowing velocity and flow path of waste liquid are chosen for primary pollution source automatic intelligent in waste liquid, on the basis of good treatment effect is ensured, effectively increase treatment effeciency, meanwhile each processing component service life is long, reduces treatment cost of waste liquor.
Description
Technical field
The invention belongs to liquid waste disposal technique field more particularly to a kind of chrome waste liquid intelligent treatment device and processing sides
Method.
Background technology
Chromium is a kind of metal with silvery white gloss, nontoxic, the very stable substance of chemical property.Chromium and its change platform object exist
Industrially be widely used, be related to metallurgy, chemical industry, mineral engineering, be electroplated, chromium processed, pigment, pharmacy, industry light industry textile industry, chromic salts and chromaking
A series of industries such as the production of object in specific application, can all generate a large amount of chrome waste liquid.
The compound of chromium is with divalent (such as CrO), trivalent (such as Cr2O3) and sexavalence (such as CrO3) form exist, but with trivalent
Most commonly seen with the compound of sexavalence, toxicity is then most strong with Cr VI, about the 100 of trivalent chromium times, and trivalent chromium takes second place, and
Bivalent chromium and chromium toxicity very little itself or nontoxicity.
The pollution of chromium is mainly caused by industry, and therefore, various countries are to the waste liquid of discharge, fisheries water water quality, field irrigation
There are strict requirements for the chromium content of water quality, the surface water and drinking water.China has been defined as Cr VI to implement overall control
One of index, and provide that Cr VI maximum concentration is 0.5mg/L in the waste liquid of industrial discharge, the maximum concentration of total chromium is 1.5mg/
L, and not handy dilution method replaces necessary processing；Chromium content must not exceed 0.05mg/L in Drinking Water.
In the prior art, for the processing method of chrome waste liquid, mainly include：Medicament reduction precipitation method, electrolytic reduction,
Ion-exchange etc., above-mentioned processing method, there are several defects, such as：There is treatment effeciencies for medicament reduction precipitation method
The problem of low, electroreduction hair there is the problem of poor processing effect and, ion-exchange is asked there is processing cost is high
Topic.
Therefore, a kind of chrome waste liquid intelligent treatment device and processing method are developed, for solving in the prior art, containing chromium
The treatment technology of waste liquid can not take into account the technological deficiency that high treating effect, treatment effeciency are high and processing cost is cheap simultaneously, into
For those skilled in the art's urgent problem to be solved.
Invention content
In view of this, it is existing for solving the present invention provides a kind of chrome waste liquid intelligent treatment device and processing method
In technology, it is cheap can not to take into account high treating effect, treatment effeciency height and processing cost simultaneously for the treatment technology of chrome waste liquid
Technological deficiency.
The present invention provides a kind of chrome waste liquid intelligent treatment device, the chrome waste liquid intelligent treatment device includes：Control
Unit processed, detection unit, waste collection unit, pH adjust unit, reduction unit, alkalization mixed cell, precipitation unit and mistake
Filter unit；The waste unit adjusts unit, reduction unit, alkalization mixed cell, precipitation unit and filtering list with the pH
Member is sequentially connected, and the waste unit is also directly connect with the alkalization mixed cell；
The detection unit is set in the waste collection unit, and the waste liquid testing result of the detection unit is transmitted to
Described control unit；
Described control unit controls chrome waste liquid to flow into pH and adjusts unit or alkalization mixed cell according to testing result, described
Control unit controls chrome waste liquid in the flowing velocity of each component according to testing result.
Preferably, the chrome waste liquid intelligent treatment device further includes：Electrolysis cells；
The electrolysis cells be set to the reduction unit and it is described alkalization mixed cell between, described control unit according to
Testing result control chrome waste liquid flows into pH and adjusts unit, alkalization mixed cell or electrolysis cells.
Preferably, the alkalization mixed cell includes：First alkalization unit and the second alkalization unit, first alkalization are single
Member and the mixing speed of the second alkalization unit are adjusted, and waste liquid is followed by the described first alkalization unit and the second alkalization unit；
Described control unit controls the mixing speed of the first alkalization unit and the second alkalization unit according to testing result.
Preferably, the chrome waste liquid intelligent treatment device further includes：Solid-liquid separation unit, the solid-liquid separation unit with
The precipitation unit connection.
Preferably, the filter element includes：TMF (tubular type micro-filtration) filter elements and RO (reverse osmosis, reverse
Osmosis) filter element；
Waste liquid after precipitation is followed by TMF filter elements and RO filter elements.
Preferably, the precipitation unit includes：First precipitation unit and the second precipitation unit, waste liquid are heavy followed by first
Shallow lake unit and the second precipitation unit.
Preferably, the chrome waste liquid intelligent treatment device further includes：Buffer cell, the buffer cell are set to described
Between precipitation unit and the filter element.
Preferably, the buffer cell is internally provided with flow detection unit, the flow detection unit and the control
Unit connects.
At a kind of waste liquid of the chrome waste liquid intelligent treatment device including described in any of the above one
Reason method, the processing method are：
Step 1: in detection unit detection waste collection unit, whether the composition of chromium includes Cr in chrome waste liquid6+,
And testing result is transmitted to control unit；
Step 2: if testing result is yes, chrome waste liquid is adjusted, also after the outflow of waste collection unit by pH successively
After former and alkalization mixing, precipitation carries out separation of solid and liquid, after liquid obtained by separation of solid and liquid is filtered using filter unit, processing
It completes；
Step 3: if testing result is no, chrome waste liquid directly carries out alkalization mixing after the outflow of waste collection unit
Afterwards, precipitation carries out separation of solid and liquid, and after liquid obtained by separation of solid and liquid is filtered using filter unit, processing is completed.
Preferably, the processing method further includes：Electrolysis is closed in contact break, and the contact break closes electrolysis and mixes it with alkalization in reduction
Between carry out；
Chrome waste liquid is included containing chromium complex in detection unit detection waste collection unit, and chrome waste liquid is to carry out alkalization mixed
Before conjunction, first carry out contact break and close electrolysis step.
Preferably, the processing method of the alkalization mixing is：According to chromium content detection in chrome waste liquid as a result, carrying out
The basification of different mixing speeds twice；
If chromium content is more than preset value, the mixing speed of first time basification is more than second basification
Mixing speed；If chromium content is less than preset value, the mixing speed of second of basification is more than first time basification
Mixing speed.
Preferably, filter residue obtained by separation of solid and liquid again passes by compression separation, obtains mud cake and waste liquid, and the waste reflux is to useless
Liquid collector unit.
Preferably, the filter method of filter element is：The liquid of separation of solid and liquid successively by TMF filtering and RO filtering after,
Processing is completed.
In conclusion the present invention provides a kind of chrome waste liquid intelligent treatment device, the chrome waste liquid Intelligent treatment dress
Put including：It is single that control unit, detection unit, waste collection unit, pH adjust unit, reduction unit, alkalization mixed cell, precipitation
Member and filter element；The waste unit and the pH adjust unit, reduction unit, alkalization mixed cell, precipitation unit with
And filter element is sequentially connected, the waste unit is also directly connect with the alkalization mixed cell；The detection unit setting
In the waste collection unit, the waste liquid testing result of the detection unit is transmitted to described control unit；The control is single
Control chrome waste liquid flows into pH adjusting units to member according to testing result or alkalization mixed cell, described control unit are tied according to detection
Fruit controls chrome waste liquid in the flowing velocity of each component.The present invention also provides a kind of including containing chromium described in any of the above one
The method for treating waste liquid of waste liquid intelligent treatment device.In technical solution provided by the invention, waste liquid is detected by detection unit
Composition, in waste liquid primary pollution source automatic intelligent choose waste liquid flowing velocity and flow path, ensure it is good
On the basis for the treatment of effect, treatment effeciency is effectively increased, meanwhile, each processing component service life is long, reduces liquid waste processing
Cost；Solve in the prior art, the treatment technology of chrome waste liquid, can not take into account simultaneously high treating effect, treatment effeciency height with
And the technological deficiency that processing cost is cheap.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structure diagram of chrome waste liquid intelligent treatment device provided in an embodiment of the present invention.
Specific embodiment
A kind of chrome waste liquid intelligent treatment device and processing method provided in an embodiment of the present invention, solve the prior art
In, the treatment technology of chrome waste liquid can not take into account the technology that high treating effect, treatment effeciency are high and processing cost is cheap simultaneously
Defect.
The technical solution in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiments obtained without making creative work belong to the model that the present invention protects
It encloses.
In order to which the present invention is described in more detail, with reference to embodiment and attached drawing to a kind of chrome waste liquid intelligence provided by the invention
Energy processing unit and processing method, are specifically described.
Referring to Fig. 1, an embodiment of the present invention provides a kind of chrome waste liquid intelligent treatment device, including：Control unit, inspection
It surveys unit, waste collection unit, pH and adjusts unit, reduction unit, alkalization mixed cell, precipitation unit and filter element；It is useless
Liquid unit adjusts unit, reduction unit, alkalization mixed cell, precipitation unit and filter element with pH and is sequentially connected, waste liquid list
Member is also directly connect with alkalization mixed cell；Detection unit is set in waste collection unit, the waste liquid detection knot of detection unit
Fruit is transmitted to control unit；Control unit controls chrome waste liquid to flow into according to testing result, and pH adjusts unit or alkalization mixing is single
Member, control unit control chrome waste liquid in the flowing velocity of each component according to testing result.One kind provided in an embodiment of the present invention
Chrome waste liquid intelligent treatment device and processing method solve in the prior art, the treatment technology of chrome waste liquid, can not be simultaneous simultaneously
Care for the technological deficiency that high treating effect, treatment effeciency are high and processing cost is cheap.
In technical solution provided in an embodiment of the present invention, the detection unit that is set in waste collection list can be to collected
The chromium type of waste liquid and the content of chromium ion of each chemical valence make accurate detection；Then, according to the inspection of chromium ion type
Survey as a result, determine collected waste liquid flow to pH adjust unit or alkalization mixed cell and, according to all types of chromium ions
Content, determine waste liquid institute's residence time in each cell, both can effectively ensure that chromium ion was completed in advance in each unit
If reaction, realize purification, while the treatment effeciency of chromium ion can also be improved.
Combination processing method makes simple declaration, the first situation, if pending waste liquid 1 contains Cr6+And Cr3+, this
When, detection unit detects two kinds of chromium ion (i.e. Cr6+And Cr3+) presence, and testing result is transmitted to control unit, controlled
Unit control waste liquid processed flow to pH and adjusts unit.
The pH that pH adjusts unit adjusting waste liquid is less than 3, during practical liquid waste processing, sulfuric acid can be used to be used as and adjust
The reagent of pH, strong acidic environment are by Cr in reduction unit6+It is reduced to Cr3+One good acidic environment is provided, promotes to restore
Efficient, the complete progress of reaction.
It, can be by Cr in reduction unit6+It is reduced to Cr3+Afterwards, Cr is contained only in waste liquid at this time3+, can in actual treatment
Use Na2S2O6As reducing agent, by Cr6+It is reduced to Cr3+Afterwards, since control unit controls the reaction time of each unit,
For namely waste liquid in the processing time of each reaction member, which is according to Cr in waste collection unit by detection unit6+
Content determined that both may insure can be with Cr6+It is reduced sufficiently, when also can ensure to be lost in reduction unit
Between, ensure the efficient progress of reduction process.
After the completion of reduction, at this point, the metal ion in waste liquid is Cr3+, alkalization mixed cell, by adding alkali, i.e.,
Waste liquid and OH—Mixing, at this point, Cr3+With OH—Form Cr (OH)3Precipitation completes precipitation process in precipitation unit.
After the completion of precipitation, precipitation at this time is the Cr (OH) containing trivalent chromium3Precipitation, residual waste solution are to have handled
Into waste liquid, at this point, to prevent certain metal ions for not being effectively addressed from influencing, it is ensured that good treatment effect so that
Treated, and waste liquid meets national standard, even better than national standard.Treated, and waste liquid again passes by filter element carried out
It is discharged again after filter.At this time, it may be necessary to which the metal ion content of filter element filtering is very low, therefore, the filter membrane of filter element can be grown
Time is employed without replacing, and purification is at low cost.
The second situation, if pending waste liquid 2 contains only Cr3+, at this point, detection unit detects Cr3+Presence, and
Testing result is transmitted to control unit, control unit control waste liquid flow to alkalization mixed cell.
At this point, waste liquid directly carries out liquid waste processing from above-mentioned alkalization mixed cell, by adding alkali, i.e. waste liquid and OH—Mixing,
At this point, Cr3+With OH—Form Cr (OH)3Precipitation completes precipitation process in precipitation unit.At remaining step and pending waste liquid 1
Reason method all same, details are not described herein.
During actual treatment, some waste liquids contain containing chromium complex, at this point, containing the chromium in chromium complex,
It can not be reacted with hydroxide ion, to realize for being effectively treated containing chromium complex, one kind provided in an embodiment of the present invention contains
Chromium waste liquid intelligent treatment device further includes：Electrolysis cells；Electrolysis cells are set between reduction unit and alkalization mixed cell, control
Unit processed controls chrome waste liquid to flow into pH and adjusts unit, alkalization mixed cell or electrolysis cells according to testing result.
If detection unit testing result is, pending waste liquid 3 contains chromium complex, Cr6+And Cr3+, then control unit connect
After receiving the testing result, waste liquid adjusts unit, reduction unit, electrolysis cells and alkalization mixed cell by pH successively, at this point,
Control unit can also control the processing time of electrolysis cells according to the content of chromium complex, remaining step is identical with waste liquid 1,
Details are not described herein.
If detection unit testing result is, pending waste liquid 4 contains chromium complex and Cr3+, then control unit receive
After the testing result, after waste liquid is directly entered electrolysis cells, then alkalization mixed cell is carried out, at this point, control unit can also basis
The content of chromium complex controls the processing time of electrolysis cells, remaining step is identical with waste liquid 2, and details are not described herein.
To ensure the good alkalization effect of alkalization mixed cell, it should ensure and come into full contact with, and cannot be mixed in alkalization
Unit precipitates, and influences the progress of later basification, increases the cleaning difficulty of alkalization mixed cell, and the embodiment of the present invention provides
Technical solution in, alkalization mixed cell include：First alkalization unit and the second alkalization unit, the first alkalization unit and the second alkali
The mixing speed for changing unit is adjusted, and waste liquid is followed by the first alkalization unit and the second alkalization unit；Control unit is according to inspection
Survey the mixing speed of the alkalization unit of output control first and the second alkalization unit.
In actual treatment, according to chromium content detection in chrome waste liquid as a result, carrying out different mixing speeds twice
Basification；If chromium content is more than preset value, the mixing speed of first time basification is more than second of basification
Mixing speed；If chromium content is less than preset value, the mixing speed of second of basification is more than at first time alkalization
The mixing speed of reason.
In processing procedure, addition NaOH and FeSO may be selected in the first alkalization unit4For Cr3+Precipitation provide OH—And cohesion
NaOH and PAC may be selected as Cr in condition, the second alkalization unit3+Precipitation provide OH—And coherence condition.Certainly, two alkalization
Identical medicament also may be selected in unit, belongs to protection scope of the present invention.
To prevent in the precipitation obtained by precipitation unit, the waste liquid also contained influences treatment effect, the utility model embodiment
A kind of chrome waste liquid intelligent treatment device provided further includes：Solid-liquid separation unit, solid-liquid separation unit are connect with precipitation unit.
In actual treatment, pneumatic diaphragm pump may be selected as solid-liquid separation unit, separated obtained mud cake directly dries in the air
After dry, separated obtained liquid can flow back to waste collection unit and be handled again.
Further optimisation technique scheme, in technical solution provided in an embodiment of the present invention, filter element includes：TMF mistakes
Filter unit and RO filter elements；Waste liquid after precipitation is followed by TMP filter elements and RO filter elements.TMF filter elements and
The cooperation of RO filter elements, advantageous effect superposition, it is ensured that processed waste liquid can realize safety dumping.Gained after filtering
Liquid can be recycled substantially close to the state of pure water, and as in pre-treatment, solvent during dosing uses.
To ensure good sedimentation effect, it is ensured that Cr (OH)3It can precipitate completely, technical side provided in an embodiment of the present invention
In case, precipitation unit includes：First precipitation unit and the second precipitation unit, waste liquid are heavy followed by the first precipitation unit and second
Shallow lake unit.
It is excessive by the waste liquid flow of filter element in the unit interval to prevent settling velocity in precipitation unit too fast, from
And the filter effect of waste liquid is influenced, a kind of chrome waste liquid intelligent treatment device provided in an embodiment of the present invention further includes：Buffering is single
Member, buffer cell are set between precipitation unit and filter element.
Buffer cell can play certain flow velocity cushioning effect, and the filtering for preventing flow velocity too fast and influencing filter element is imitated
Fruit.During practical application, for preferably coutroi velocity, buffering can also be set single between remaining each adjacent cells
Member such as adjusts in pH and sets buffer cell between unit and reduction unit, belongs to protection scope of the present invention.
On the basis of the good buffering effect of buffer cell is ensured, the intelligence with buffer unit buffers is taken into account, is prevented
Being normally carried out for filtering is influenced, in technical solution provided in an embodiment of the present invention, buffer cell is internally provided with flow detection list
Member, flow detection unit are connect with control unit.
Flow detection unit detects the flow of liquid in buffer cell in real time, if flow is excessive, by the excessive result of flow
Control unit is transmitted to, control unit slows down flow velocity of the waste liquid in each unit；Similarly, if flow is too small, corresponding finger is also made
Show, details are not described herein.
It by technical solution provided by the invention, applied to industrial production, can be obtained through practical application, for conventional waste liquid, sheet
The technical solution provided is invented, the odd-numbered day can handle 300 tons of chrome waste liquid, and the processing cost of chrome waste liquid per ton is 15 yuan；It is residing
The waste liquid of reason meets national standard after testing.
Compared with prior art, the treatment effeciency of chrome waste liquid improves 28%, and processing cost reduces 25%.
In conclusion the present invention provides a kind of chrome waste liquid intelligent treatment device, the chrome waste liquid Intelligent treatment dress
Put including：It is single that control unit, detection unit, waste collection unit, pH adjust unit, reduction unit, alkalization mixed cell, precipitation
Member and filter element；The waste unit and the pH adjust unit, reduction unit, alkalization mixed cell, precipitation unit with
And filter element is sequentially connected, the waste unit is also directly connect with the alkalization mixed cell；The detection unit setting
In the waste collection unit, the waste liquid testing result of the detection unit is transmitted to described control unit；The control is single
Control chrome waste liquid flows into pH adjusting units to member according to testing result or alkalization mixed cell, described control unit are tied according to detection
Fruit controls chrome waste liquid in the flowing velocity of each component.The present invention also provides a kind of including containing chromium described in any of the above one
The method for treating waste liquid of waste liquid intelligent treatment device.In technical solution provided by the invention, waste liquid is detected by detection unit
Composition, in waste liquid primary pollution source automatic intelligent choose waste liquid flowing velocity and flow path, ensure it is good
On the basis for the treatment of effect, treatment effeciency is effectively increased, meanwhile, each processing component service life is long, reduces liquid waste processing
Cost；Solve in the prior art, the treatment technology of chrome waste liquid, can not take into account simultaneously high treating effect, treatment effeciency height with
And the technological deficiency that processing cost is cheap.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of chrome waste liquid intelligent treatment device, which is characterized in that the chrome waste liquid intelligent treatment device includes：Control is single
It is single that member, detection unit, waste collection unit, pH adjust unit, reduction unit, alkalization mixed cell, precipitation unit and filtering
Member；The waste unit and the pH adjust unit, reduction unit, alkalization mixed cell, precipitation unit and filter element according to
Secondary connection, the waste unit are also directly connect with the alkalization mixed cell；
The detection unit is set in the waste collection unit, and the waste liquid testing result of the detection unit is transmitted to described
Control unit；
Described control unit controls chrome waste liquid to flow into pH and adjusts unit or alkalization mixed cell, the control according to testing result
Unit controls chrome waste liquid in the flowing velocity of each component according to testing result.
2. chrome waste liquid intelligent treatment device according to claim 1, which is characterized in that the chrome waste liquid Intelligent treatment
Device further includes：Electrolysis cells；
The electrolysis cells are set between the reduction unit and the alkalization mixed cell, and described control unit is according to detection
Output control chrome waste liquid flows into pH and adjusts unit, alkalization mixed cell or electrolysis cells.
3. chrome waste liquid intelligent treatment device according to claim 1, which is characterized in that the alkalization mixed cell packet
It includes：The mixing speed of first alkalization unit and the second alkalization unit, the first alkalization unit and the second alkalization unit is adjusted,
Waste liquid is followed by the described first alkalization unit and the second alkalization unit；
Described control unit controls the mixing speed of the first alkalization unit and the second alkalization unit according to testing result.
4. chrome waste liquid intelligent treatment device according to claim 1, which is characterized in that the chrome waste liquid Intelligent treatment
Device further includes：Solid-liquid separation unit, the solid-liquid separation unit are connect with the precipitation unit.
5. chrome waste liquid intelligent treatment device according to claim 1, which is characterized in that the filter element includes：TMF
Filter element and RO filter elements；
Waste liquid after precipitation is followed by TMF filter elements and RO filter elements.
6. a kind of method for treating waste liquid of the chrome waste liquid intelligent treatment device including described in claim 1 to 5 any one,
It is characterized in that, the processing method is：
Step 1: in detection unit detection waste collection unit, whether the composition of chromium includes Cr in chrome waste liquid6+, and will
Testing result is transmitted to control unit；
Step 2: if testing result is yes, chrome waste liquid after the outflow of waste collection unit, adjusted successively by pH, restore with
And after alkalization mixing, precipitation carries out separation of solid and liquid, after liquid obtained by separation of solid and liquid is filtered using filter unit, has handled
Into；
Step 3: if testing result is no, chrome waste liquid is after the outflow of waste collection unit, after directly carrying out alkalization mixing, sinks
It forms sediment and carries out separation of solid and liquid, after liquid obtained by separation of solid and liquid is filtered using filter unit, processing is completed.
7. method for treating waste liquid according to claim 6, which is characterized in that the processing method further includes：Electricity is closed in contact break
Solution, the contact break are closed electrolysis and are carried out between reduction and alkalization mix；
Chrome waste liquid is included containing chromium complex in detection unit detection waste collection unit, and chrome waste liquid is carrying out alkalization mixing
Before, it first carries out contact break and closes electrolysis step.
8. method for treating waste liquid according to claim 6, which is characterized in that it is described alkalization mixing processing method be：Root
According to chromium content detection in chrome waste liquid as a result, carrying out the basification of different mixing speeds twice；
If chromium content is more than preset value, the mixing speed of first time basification is more than the stirring of second of basification
Speed；If chromium content is less than preset value, the mixing speed of second of basification is more than stirring for first time basification
Mix speed.
9. method for treating waste liquid according to claim 6, which is characterized in that filter residue obtained by separation of solid and liquid again passes by compression
Separation, obtains mud cake and waste liquid, the waste reflux to waste collection unit.
10. method for treating waste liquid according to claim 6, which is characterized in that the filter method of filter element is：Solid-liquid point
From liquid successively by TMF filtering and RO filtering after, processing complete.
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| CN201711481963.8A CN108164052A (en) | 2017-12-29 | 2017-12-29 | A kind of chrome waste liquid intelligent treatment device and processing method |
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| CN201711481963.8A CN108164052A (en) | 2017-12-29 | 2017-12-29 | A kind of chrome waste liquid intelligent treatment device and processing method |
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