CN204779147U - Handle chromium -containing wastewater's device - Google Patents
Handle chromium -containing wastewater's device Download PDFInfo
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- CN204779147U CN204779147U CN201520353607.8U CN201520353607U CN204779147U CN 204779147 U CN204779147 U CN 204779147U CN 201520353607 U CN201520353607 U CN 201520353607U CN 204779147 U CN204779147 U CN 204779147U
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Abstract
The utility model relates to a handle chromium -containing wastewater's device, including reactor, loading hopper, electronic agitating unit, pH detector, acid burette, alkali formula burette, the loading hopper setting is at the top of reactor, and electronic agitating unit sets up below reactor middle position liquid level, and the pH detector sets up in the reactor, and acid burette, alkali formula burette set up at the reactor top. The advantage is: contain a large amount of sulfite ion in the desulfurization ash that semidry method flue gas desulfurization produced, have stronger still originality, handle chromium -containing wastewater with it, can quick effectual reduction hexavalent chromium ion, reaction time is very short, and the treatment effect is good, has realized waste control by waste, has reduced treatment cost, has realized the accurate control of reactant, whole device simple structure, the easy operation through acid, alkali formula burette, loading hopper.
Description
Technical field
The utility model relates to a kind of device of processing waste water containing chrome.
Background technology
Iron and steel enterprise's cold rolling mill adopts chrome-plated process to carry out process to improve value-added content of product to plate surface usually.This technological process creates a large amount of chromate waste water, and it is containing Cr
6+concentration is up to 1000 ~ 5000mg/L, and sexavalent chrome has severe toxicity, its discharge severe contamination ecotope.In the waste water of China " Iron And Steel Industry pollution discharge standard GB13456-2012 " regulation discharge, content of 6-valence Cr ions must not more than 0.5mg/L, and total chrome content must not more than 1.5mg/L.
At present, the process of chromate waste water adopts chemical reduction treatment process usually, is namely reductive agent with S-WAT in acid condition, adds lime (or sodium hydroxide) precipitation process chromate waste water.This technique also exists following deficiency: adopt S-WAT to make reductive agent, consume a large amount of S-WAT, cost is high; In S-WAT reduction and detoxication process, due to sour environment, inferior sulfate radical probably releases SO under acidity effect
2, air is polluted; In chromium slag, total chromium and sexavalent chrome still can not meet the requirement of national new standard GB13456-2012, and the chromium quantity of slag of generation is large, stack storage and take a large amount of spaces.
Existing chromium containing waste water treatment method is as follows:
1, reduction precipitation method.Namely in waste water, reductive agent is added in acid condition, by Cr
6+be reduced into Cr
3+, and then add lime or sodium hydroxide, make it generate chromium hydroxide precipitation in the basic conditions, thus remove chromium ion.But when adopting this method, the selection of reductive agent is a vital problem, different reductive agents, treatment effect difference is obvious, and this device lacks the accurate control to acid, alkali add-on, makes reaction pH unstable, affects removal effect;
As: " FeSO
4/ H
2o
2the research of process silicon steel Wastewater ", Zhang Wenyi, Luo Xin, Li Qiuyan etc., iron and steel, 2010,45 (11): 90-93.Test adopts FeSO
4and H
2o
2for treatment agent, utilize Fe
2+reductibility and Fe in acid condition
2+with H
2o
2form the catalyzed oxidation characteristic of Fenton reagent, to the Cr in waste water
6+synchronously remove with CODcr.Test-results can be obtained, Cr after process
6+, CODcr clearance is respectively 99.99% and 98.11%, reaches the first grade discharging requirement in " Iron And Steel Industry pollution discharge standard " (GB13456-92).But the method needs to consume a large amount of hydrogen peroxide, and processing cost is high, its usability from the angle limits of economy.
2, electrolytic reduction.Namely iron anode is under direct current effect, and constantly dissolve and produce ferrous ion, in acid condition, hexavalent chromium is reduced into trivalent chromic ion by ferrous ion, Cr
3+separate out with precipitation of hydroxide, reach the object of purification of waste water.But the method iron plate consumption is more, make to be mixed with a large amount of ironic hydroxides in mud, utility value is low, and this device needs to consume a large amount of electric energy, and running expense is higher;
As: " pilot scale research of cold rolling chromate waste water microelectrolysis processing ", Yan Gang, magnifies China, industrial safety and environmental protection, and 2010,36 (2): 9-10.Have studied iron/carbon micro-electrolysis reducing process to the process of passivating solution chromate waste water, Economic and Efficiency Analysis shows, micro electrolysis tech has certain cost advantage.But because the method iron carbon filler easily hardens, cause process thorough not, affect removal efficiency.
3, absorption method.Namely adopt the chromium in adsorbent process waste water, the concentration of chromium is reduced.But the method processing cost is higher, and this device need establish back-purge system, and structure is comparatively complicated;
As: Peng Ronghua, Zeng Wennan, Li Xiaoxiang.The research for the treatment of of chromium-containing wastewater by sulphonated peat coal.Coal journal, 2007,32 (8): 860-864.This research take sulfonation peat as sorbent material, adsorbing and treating chromium-containing wastewater, and the factors such as pH value, adsorption temp and adsorbent amount that discuss are to sulfonation peat absorption and reduction Cr
6+impact.Result shows, pH value is impact reduction, absorption Cr
6+principal element, sulfonation peat Adsorption Cr
6+effect is better, but adsorption and desorption process is more loaded down with trivial details, limits the use of the method.
4, ion exchange method.Even if spent ion exchange resin carries out selective adsorption to sexavalent chrome in waste water.The shortcoming of this method is that operation and Master Cost are high, inapplicable economically, and this device operational administrative is complicated;
As: patent " ion exchange treatment process containing hexavalent chromium wastewater ", application number: 200810156910.3, except chromium post is designed to three posts or multicolumn, the medial launder of adjustable pH value is provided with between each ion exchange column, when two posts or multicolumn tandem working, pilot process can adjust ph, makes water treatment effect better.But this art breading cost is higher.
5, biological process.Namely multi-cultur es combination treatment chromate waste water is adopted.But the method is not suitable for the chromate waste water processing high density, and this device needs to establish microbial cultivation device before reaction unit, adds cost.
As: " progress of the cold rolling chromate waste water of Biochemical method Baosteel " Zhou Yusheng, Yu Yongmei, Bai Ling etc., iron and steel, 2005,40 (6): 76-79.Laboratory culture is applicable to the composite microbial bacteria processing heavy metal-containing waste water, more obvious to the treatment effect of cold rolling chromate waste water than traditional chemical method, and after process, in water, total chromium is lower than 1.5mg/L, and sexavalent chrome is lower than 0.5mg/L.But this method culturing micro-organisms cycle is long, and capacity of resisting impact load is poor, be not suitable for processing a large amount of high-concentration chromium-containing wastewater.
As: YuYongmei, ZhouYusheng.Pilotstudyonmicrobialtreatmentofhighconcentr ationchromiumwastewaterfromcoldrollingmills [J] .Environmentalprotection, 2008,2 (1): 46-50. these researchs adopt Biochemical method chromate waste water, to the Cr in waste water
6+, T-Cr all has good removal effect (Cr
6+<0.5mg/L, T-Cr<1.5mg/L), but this method capacity of resisting impact load is poor, is not suitable for processing high-concentration chromium-containing wastewater.
The weak points such as in sum, it is high that existing treatment process also exists processing cost, and capacity of resisting impact load is poor, and treatment effect is not up to standard; The shortcomings such as existing treatment unit also exists reaction conditions and is difficult to accurate control, and operation is difficult.
Summary of the invention
For overcoming the deficiencies in the prior art, the purpose of this utility model is to provide a kind of device of processing waste water containing chrome, easy handling, is convenient to control, and improves treatment effect, reduces processing cost.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of device of processing waste water containing chrome, comprise reactor, loading hopper, electric mixing device, pH detector, acid dropper, alkali formula dropper, loading hopper is arranged on the top of reactor, electric mixing device is arranged on below reactor middle position liquid level, pH detector is arranged in the reactor, and acid dropper, alkali formula dropper are arranged on reactor head.
Described loading hopper is marked with scale.
Described acid, alkali formula dropper are equipped with cock, in order to control the add-on of acid or alkali.
Baffle plate is provided with, in order to control desulphurize fly ash add-on bottom described loading hopper.
Compared with prior art, the beneficial effects of the utility model are:
Containing a large amount of sulfite ions in the desulphurize fly ash that semi-dry process flue gas desulphurization produces, there is stronger reductibility, use its processing waste water containing chrome, can reduction of hexavalent chromium ion fast and effectively, reaction times is very short, treatment effect is good, achieve the treatment of wastes with processes of wastes against one another, reduce processing cost, achieved the accurate control of reactant by acid, alkali formula dropper, loading hopper, detect realization response by pH simultaneously and precisely control, in whole reaction process, achieve even complete reaction in stirring always, whole apparatus structure is simple, easy handling.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1-reactor 2-loading hopper 3-baffle plate 4-electric mixing device 5-acid dropper 6-alkali formula dropper 7-cock one 8-cock two 9-pH detector.
Embodiment
Below in conjunction with Figure of description, the utility model is described in detail, but it should be noted that enforcement of the present utility model is not limited to following embodiment.
See Fig. 1, a kind of method of processing waste water containing chrome, the desulphurize fly ash reduction treatment chromate waste water adopting semi-dry process flue gas desulphurization to produce, specifically comprises the following steps:
1) in chromate waste water, add sulfuric acid (the employing vitriol oil), regulate wastewater pH between 2 ~ 3;
2) in acid condition, in chromate waste water, add desulphurize fly ash, make liquid-solid ratio be 30:1 ~ 32:1;
3) stir after 1 ~ 2 hour and stop stirring, add sodium hydroxide or limestone vegetation to pH=7 ~ 8, make Cr
3+generate Cr (OH)
3precipitation;
4) staticly settle 30 ~ 40min, get supernatant liquor and measure Cr
6+content.
Wherein, desulphurize fly ash comprises CaSO
3, account for desulphurize fly ash mass percent 40% ~ 45%.
The device of processing waste water containing chrome, comprise reactor 1, loading hopper 2, electric mixing device 4, pH detector 9, acid dropper 5, alkali formula dropper 6, loading hopper 2 is arranged on the top of reactor 1, electric mixing device 4 is arranged on below reactor 1 middle position liquid level, electric mixing device 4 comprises motor and stirring rod, driven by motor stirring rod rotates, and rotating speed can regulate, and makes the liquid-solid abundant reaction of reactor 1 inside; Acid dropper 5, alkali formula dropper 6 are arranged on reactor 1 top, for dripping acid, alkali in reactor 1; PH detector 9 arranges in reactor 1, in acid adding, adds after alkali for detection reaction liquid pH value.
Wherein, loading hopper 2 is marked with scale.Acid, alkali formula dropper 5,6 are equipped with cock, in order to control the add-on of acid or alkali.Baffle plate 3 is provided with, in order to control desulphurize fly ash add-on bottom loading hopper 2.
Embodiment 1
The treatment process of chromate waste water is as follows:
Chromate waste water 2000mL is got to certain steel mill's cold rolling mill, by in loading hopper 2 injecting reactor 1, dropwise sulfuric acid is added from acid dropper 5 by control cock 1 under electric mixing device 4 agitation condition, observation pH detector 9 to pH stops acid adding when being 2, desulphurize fly ash (before forced oxidation) 66.7g is added in loading hopper 2, namely liquid-solid ratio is 30:1 scale marks place, open baffle plate 3, desulphurize fly ash (reductive agent) is made to join in reaction solution, after electric mixing device 4 stirring reaction 1h, to reaction solution, dropwise sodium hydroxide is added by control cock 28 from alkali formula dropper 6, stop when regulating pH to be 7 stirring, leave standstill 30min, completely to be precipitated, get supernatant liquor and measure total chromium and Cr
6+content.
Embodiment 2
A kind for the treatment of process of chromate waste water is as follows:
Chromate waste water 2000mL is got to cold rolling mill, by in loading hopper 2 injecting reactor 1, dropwise sulfuric acid is added from acid dropper 5 by control cock 1 under electric mixing device 4 agitation condition, observation pH detector 9 to pH stops acid adding when being 2.5, desulphurize fly ash (before forced oxidation) 64.5g is added in loading hopper 2, namely liquid-solid ratio is 31:1 scale marks place, open baffle plate 3, reductive agent is made to join in reaction solution, after stirring reaction 1.5h, to reaction solution, dropwise sodium hydroxide is added by control cock 28 from alkali formula dropper 6, stop when regulating pH to be 7.5 stirring, leave standstill 30min, completely to be precipitated, get supernatant liquor and measure total chromium and Cr
6+content.
Embodiment 3
A kind for the treatment of process of chromate waste water is as follows:
Get chromate waste water 2000mL, by in loading hopper 2 injecting reactor 1, dropwise sulfuric acid is added from acid dropper 5 by control cock 1 under electric mixing device 4 agitation condition, observation pH detector 9 to pH stops acid adding when being 3, desulphurize fly ash (before forced oxidation) 62.5g is added in loading hopper 2, namely liquid-solid ratio is 32:1 scale marks place, open baffle plate 3, reductive agent is made to join in reaction solution, after stirring reaction 2h, to reaction solution, dropwise sodium hydroxide is added by control cock from alkali formula dropper 6, stop when regulating pH to be 8 stirring, leave standstill 30min, completely to be precipitated, get supernatant liquor and measure total chromium and Cr
6+content.
Embodiment 4
A kind for the treatment of process of chromate waste water is as follows:
Get chromate waste water 2000mL, by in loading hopper 2 injecting reactor 1, dropwise sulfuric acid is added from acid dropper 5 by control cock 1 under electric mixing device 4 agitation condition, observation pH detector 9 to pH stops acid adding when being 2, desulphurize fly ash (before forced oxidation) 66.7g is added in loading hopper 2, namely liquid-solid ratio is 30:1 scale marks place, open baffle plate 3, desulphurize fly ash (reductive agent) is made to join in reaction solution, after stirring reaction 2h, to reaction solution, dropwise sodium hydroxide is added by control cock 28 from alkali formula dropper 6, stop when regulating pH to be 7.5 stirring, leave standstill 30min, completely to be precipitated, get supernatant liquor and measure total chromium and Cr
6+content.
Said determination result is as shown in table 1, and result shows that the method effectively can remove total chromium in waste water and Cr
6+, clearance, all close to 100%, reaches the emission request of " Iron And Steel Industry pollution discharge standard GB13456-2012 ".
The each embodiment of table 1 is to total chromium and Cr
6+removal effect
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| Cr in former water 6+Concentration (mg/L) | 1233 | 1233 | 1233 | 1233 |
| Cr after process 6+Concentration (mg/L) | 0.15 | 0.09 | 0.12 | 0.04 |
| Total chromium concn (mg/L) after process | 0.68 | 0.53 | 0.64 | 0.39 |
Claims (4)
1. the device of a processing waste water containing chrome, it is characterized in that, comprise reactor, loading hopper, electric mixing device, pH detector, acid dropper, alkali formula dropper, loading hopper is arranged on the top of reactor, electric mixing device is arranged on below reactor middle position liquid level, pH detector is arranged in the reactor, and acid dropper, alkali formula dropper are arranged on reactor head.
2. the device of a kind of processing waste water containing chrome according to claim 1, is characterized in that, described loading hopper is marked with scale.
3. the device of a kind of processing waste water containing chrome according to claim 1, is characterized in that, described acid, alkali formula dropper is equipped with cock, in order to control the add-on of acid or alkali.
4. the device of a kind of processing waste water containing chrome according to claim 1 and 2, is characterized in that, is provided with baffle plate bottom described loading hopper, in order to control the add-on of chromate waste water and desulphurize fly ash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520353607.8U CN204779147U (en) | 2015-05-27 | 2015-05-27 | Handle chromium -containing wastewater's device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520353607.8U CN204779147U (en) | 2015-05-27 | 2015-05-27 | Handle chromium -containing wastewater's device |
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| Publication Number | Publication Date |
|---|---|
| CN204779147U true CN204779147U (en) | 2015-11-18 |
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ID=54519239
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|---|---|---|---|
| CN201520353607.8U Expired - Fee Related CN204779147U (en) | 2015-05-27 | 2015-05-27 | Handle chromium -containing wastewater's device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204779147U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107335165A (en) * | 2017-07-31 | 2017-11-10 | 武汉钢铁有限公司 | Chromium slag integration removing toxic substances curing based on metallurgical solid waste |
-
2015
- 2015-05-27 CN CN201520353607.8U patent/CN204779147U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107335165A (en) * | 2017-07-31 | 2017-11-10 | 武汉钢铁有限公司 | Chromium slag integration removing toxic substances curing based on metallurgical solid waste |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20210527 |