CN204490968U - A kind of from containing the device reclaiming chromium hexavalent chromium wastewater - Google Patents
A kind of from containing the device reclaiming chromium hexavalent chromium wastewater Download PDFInfo
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- CN204490968U CN204490968U CN201520170431.2U CN201520170431U CN204490968U CN 204490968 U CN204490968 U CN 204490968U CN 201520170431 U CN201520170431 U CN 201520170431U CN 204490968 U CN204490968 U CN 204490968U
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Abstract
The utility model relates to a kind of from containing the device reclaiming chromium hexavalent chromium wastewater, and this device comprises extraction tank, reduction reextraction groove, described extraction tank establish waterwater entrance, extraction agent entrance, pure water inlet and organic phase outlet, described reduction reextraction groove establishes organic phase entrance, reduction reextraction liquid entrance, trivalent chromium solutions outlet and regeneration organic phase outlet, also comprise vaporizer and crystallizer tank, described organic phase outlet is connected with described organic phase entrance, described regeneration organic phase outlet is connected with described extraction agent entrance, liquid material entrance established by described vaporizer, liquid material outlet and pneumatic outlet, described liquid material entrance exports with described trivalent chromium solutions and is connected, described liquid material outlet is connected with described crystallizer tank, described pneumatic outlet passes through heat exchanger successively, reduction reextraction liquid holding tank, reduction reextraction liquid preparing tank is connected with described reduction reextraction liquid entrance.Complete assembly novel structure, separation efficiency is high, operates continuous, easy, is applicable to the separation containing sexavalent chrome waste liquid and recovery.
Description
Technical field
The utility model relates to a kind of from containing the device reclaiming chromium hexavalent chromium wastewater, belongs to sewage treatment area.
Background technology
All need in industries such as chromaking work, the passivation of steel-making cold-reduced sheet, chemical plating, tannings or produce chromium (Cr
6+), a large amount of chrome waste liquid can be produced.Chromium (Cr
6+) be one of high toxicity element, direct discharge can cause severe contamination to environment, and human contact or absorption can cause the grievous injuries such as skin ulceration, respiratory inflammation, anaemia, neuritis, one of it or known carcinogenic substance.
At present, containing chromium (Cr
6+) waste liquid harmless treatment mainly chemical reduction, precipitation after seal landfill up for safekeeping.If containing chromium (Cr after processing
3+) waste residue carry out discharging or landfill, in the long run, also can pollute environment.Also there is data to show and adopt extraction process to concentrate extraction and recovery disposal containing chromium (Cr
6+) waste water, but be carry out under highly acidity (about PH=2) condition owing to extracting, and reextraction carries out under strong basicity (alkali concn is greater than 1M) condition, reagent consumption is large, produces a large amount of high-salt wastewater aftertreatment difficulty.And strip liquor concentration is low, aftertreatment costly.Therefore need one to reduce reagent consumption, the device that environmental pollution is less processes containing chromium (Cr
6+) waste liquid.
Extraction is the lock out operation utilizing the difference of solute solubleness in different solvents to carry out, and is a kind of conventional separation means in Chemical Manufacture, be widely used and drug purification, nucleic be separated, the fields such as petroleum refining.Conventional extraction equipment can be divided into mixing-clarifying tank according to constructional feature, tower extraction and centrifugal extraction three kinds of forms.Wherein mixing-clarifying tank has separating effect and stablizes, and process combination is flexible, and the feature that energy consumption is low, has accounted for main status in Application in Chemical Engineering.But for the extracting operation that height is compared, traditional clarification-mixing equipment is difficult to meet its requirement be separated.
Utility model content
The technical problem that the utility model solves effectively is reclaimed the chromium in hexavalent chromium wastewater.
The technical solution of the utility model is, provides a kind of from containing the device reclaiming chromium hexavalent chromium wastewater, comprises extraction tank, reduction reextraction groove, described extraction tank establish waterwater entrance, extraction agent entrance, pure water inlet and organic phase outlet, described reduction reextraction groove establishes organic phase entrance, reduction reextraction liquid entrance, trivalent chromium solutions outlet and regeneration organic phase outlet, also comprise vaporizer and crystallizer tank, described organic phase outlet is connected with described organic phase entrance, described regeneration organic phase outlet is connected with described extraction agent entrance, liquid material entrance established by described vaporizer, liquid material outlet and pneumatic outlet, described liquid material entrance exports with described trivalent chromium solutions and is connected, described liquid material outlet is connected with described crystallizer tank, described pneumatic outlet passes through heat exchanger successively, reduction reextraction liquid holding tank, reduction reextraction liquid preparing tank is connected with described reduction reextraction liquid entrance.
Further, described regeneration organic phase outlet is connected with described extraction agent entrance by extraction agent storage tank.
Further, described extraction tank is three-stage counter-flow extractor.
Further, described reduction reextraction groove is two stage countercurrent reduction reextraction grooves.
The working process of the device of the recovery chromium that the utility model provides is: chromyl waste water enters from waterwater entrance, extracts chromic extraction agent simultaneously and enters from extraction agent entrance, through extraction, remove the chromic aqueous solution and discharge from pure water inlet, described extraction is three stage countercurrent extractions preferably, the chromic organic phase of load enters reduction reextraction groove by organic phase entrance after organic phase outlet is discharged, the preferred secondary countercurrent reextraction of reduction reextraction groove gets groove, the organism with reductibility that reduction reextraction liquid selects ethanol or oxalic acid etc. and water miscible enters from reduction reextraction liquid entrance, after stripping, discharge from trivalent chromium solutions outlet containing the chromic aqueous solution, enter vaporizer, evaporate portion of water, after excessive reduction reextraction liquid evaporation, condensation is reclaimed, again reduction reextraction groove is entered by reduction reextraction liquid entrance after regulating concentration by reduction reextraction liquid preparing tank again, after sexavalent chrome is reduced, extraction agent is regenerated, and the extraction agent of regeneration is entered by the extraction agent entrance of extraction tank by regeneration organic phase outlet, and the extraction agent of regeneration can enter extraction tank through extraction agent storage tank as buffering again, enter the concentrated also crystallization of crystallizer tank after trivalent chromium solutions evaporation again and obtain Cr
2(SO
4)
36H
2o.
The beneficial effects of the utility model are, complete assembly novel structure, and separation efficiency is high, operate continuous, easy, are applicable to the separation containing sexavalent chrome waste liquid and recovery.
Accompanying drawing explanation
Fig. 1 represents the device connection diagram of the recovery chromium that the utility model improves.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
The present embodiment provides a kind of from containing the device reclaiming chromium hexavalent chromium wastewater, as shown in Figure 1, comprise extraction tank 1 (three-stage counter-flow extractor), reduction reextraction groove 2 (two stage countercurrent reduction reextraction grooves), vaporizer 11 and crystallizer tank 12, extraction tank 1 establishes waterwater entrance 3, extraction agent entrance 4, pure water inlet 5 and organic phase outlet 6, reduction reextraction groove 2 establishes organic phase entrance 7, reduction reextraction liquid entrance 8, trivalent chromium solutions outlet 9 and regeneration organic phase outlet 10, organic phase outlet 6 is connected with organic phase entrance 7, regeneration organic phase outlet 10 is connected with extraction agent entrance 4 by extraction agent storage tank 16, liquid material entrance established by described vaporizer 11, liquid material outlet and pneumatic outlet, described liquid material entrance and described trivalent chromium solutions export 9 and are connected, described liquid material outlet is connected with described crystallizer tank 12, described pneumatic outlet is successively by heat exchanger 13, reduction reextraction liquid holding tank 14, reduction reextraction liquid preparing tank 15 is connected with described reduction reextraction liquid entrance 8.Described connection all adopts pipeline UNICOM.
In actual moving process, with trialkyl tertiary amine for extraction agent, take kerosene as extraction agent solvent, composition extracts chromyl waste water containing the trialkyl tertiary amine-kerosin of 30wt%, under height compares condition, namely with the chromyl waste water that a small amount of extraction agent solution extraction is a large amount of, such ability increases the concentration of the rear chromium of extraction as far as possible, reduce vaporize water solution and consume excessive power, a small amount of organic phase enters in extraction tank 1 through extraction agent entrance 4, chromate waste water flows through three grades successively from waterwater entrance 3, secondary, after the extraction of one-level extraction tank, discharge from pure water inlet 5, the chromic kerosene of load after extraction flows out from organic phase outlet 6, enter into two stage countercurrent reduction reextraction grooves 2 from organic phase entrance 7 again and carry out Reduced separating, flow through one-level successively, second-stage reduction reextraction groove, excessive aqueous ethanolic solution enters from reduction reextraction liquid entrance 8, sexavalent chrome enters aqueous phase after being become trivalent chromium by ethanol reduction and is separated with trialkyl tertiary amine, discharge from regeneration organic phase outlet 10 after the kerosin of trialkyl tertiary amine is reduced regeneration, continue to enter from extraction agent entrance 4 to reuse.The chromic aqueous solution and excessive ethanol dissolve each other, with organic phase layering in second-stage reduction reextraction groove, organic phase is positioned at upper strata, aqueous phase is positioned at lower floor, enter into vaporizer 11 containing chromic solution from trivalent chromium solutions outlet 9 and carry out ethanol recovery, alcohol vapor is collected by being reduced anti-stripping agent holding tank 14 after heat exchanger 13 condensation, enter reduction reextraction liquid preparing tank 15 afterwards, enter reduction reextraction groove 2 by reduction reextraction liquid entrance 8 after alcohol concn is adjusted to about 50% and reuse; Trivalent chromium solutions is converted into Cr through condensing crystal in crystallizer tank 12
2(SO
4)
36H
2o, realizes separation and the recovery of chromium.Whole system is pollution-free outer row, extraction agent and reduction reextraction agent all achieve recycle.
Claims (4)
1., from containing the device reclaiming chromium hexavalent chromium wastewater, comprise extraction tank (1), reduction reextraction groove (2), described extraction tank (1) establish waterwater entrance (3), extraction agent entrance (4), pure water inlet (5) and organic phase outlet (6), described reduction reextraction groove (2) establishes organic phase entrance (7), reduction reextraction liquid entrance (8), trivalent chromium solutions outlet (9) and regeneration organic phase outlet (10), it is characterized in that, also comprise vaporizer (11) and crystallizer tank (12), described organic phase outlet (6) is connected with described organic phase entrance (7), described regeneration organic phase outlet (10) is connected with described extraction agent entrance (4), liquid material entrance established by described vaporizer (11), liquid material outlet and pneumatic outlet, described liquid material entrance exports (9) and is connected with described trivalent chromium solutions, described liquid material outlet is connected with described crystallizer tank (12), described pneumatic outlet is successively by heat exchanger (13), reduction reextraction liquid holding tank (14), reduction reextraction liquid preparing tank (15) is connected with described reduction reextraction liquid entrance (8).
2. device as claimed in claim 1, it is characterized in that, described regeneration organic phase outlet (10) is connected with described extraction agent entrance (4) by extraction agent storage tank (16).
3. device as claimed in claim 1 or 2, it is characterized in that, described extraction tank (1) is three-stage counter-flow extractor.
4. device as claimed in claim 1 or 2, it is characterized in that, described reduction reextraction groove (2) is two stage countercurrent reduction reextraction grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520170431.2U CN204490968U (en) | 2015-03-25 | 2015-03-25 | A kind of from containing the device reclaiming chromium hexavalent chromium wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520170431.2U CN204490968U (en) | 2015-03-25 | 2015-03-25 | A kind of from containing the device reclaiming chromium hexavalent chromium wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204490968U true CN204490968U (en) | 2015-07-22 |
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ID=53570263
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520170431.2U Active CN204490968U (en) | 2015-03-25 | 2015-03-25 | A kind of from containing the device reclaiming chromium hexavalent chromium wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114684849A (en) * | 2020-12-31 | 2022-07-01 | 厦门绿邦膜技术有限公司 | System and process for recovering heavy metal from aging liquid of plating tank |
-
2015
- 2015-03-25 CN CN201520170431.2U patent/CN204490968U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114684849A (en) * | 2020-12-31 | 2022-07-01 | 厦门绿邦膜技术有限公司 | System and process for recovering heavy metal from aging liquid of plating tank |
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