CN104030508A - Cyanide breaking method of cyanogen-containing wastewater - Google Patents
Cyanide breaking method of cyanogen-containing wastewater Download PDFInfo
- Publication number
- CN104030508A CN104030508A CN201410178320.6A CN201410178320A CN104030508A CN 104030508 A CN104030508 A CN 104030508A CN 201410178320 A CN201410178320 A CN 201410178320A CN 104030508 A CN104030508 A CN 104030508A
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- CN
- China
- Prior art keywords
- cyanide
- wastewater
- cyanogen
- cyanide wastewater
- broken
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- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000002351 wastewater Substances 0.000 title claims abstract description 65
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 36
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- 230000035484 reaction time Effects 0.000 claims description 8
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 6
- 238000013019 agitation Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a cyanide breaking method of cyanogen-containing wastewater. The method comprises the following steps: heating yanogen-containing wastewater through an auxiliary heating device to a certain temperature, adding formaldehyde to the wastewater in order to reinforce the activity of cyanogen, and hydrolyzing cyanogen under alkaline conditions. Reactions in the invention are carried out under mild conditions. The method has the advantages of obvious cyanide breaking effect, low equipment investment cost and small occupied area, and has certain application values in cyanogen-containing wastewater treatment.
Description
Technical field
The invention belongs to wastewater treatment field of environment protection, relate in particular to a kind of broken cyanide method of cyanide wastewater.
Background technology
Environmental issue more and more obtains people's attention in recent years, one of problem that Ye Jiangshi entire society need to face for a long time.In the modern manufacturing, waste water,waste gas and industrial residue, exists all the time, and a kind of as in waste water of cyanide wastewater, the investigator of all circles conducts extensive research it.
The method of the Treatment of Cyanide-containing Wastewater of report is a lot of at present, is generally speaking divided into two kinds of situations, and a kind of is that the prussiate in high cyanide containing wastewater is carried out to recycling, and another kind is the prussiate in low cyanide wastewater to be carried out to the method processing of broken cyanide.Prussiate in high cyanide containing wastewater is reclaimed to general employing: solvent extration, ion exchange method, liquid-film method etc., these methods can realize the recovery to prussiate in high cyanide containing wastewater, but residual waste water generally all needs secondary treatment.Prussiate in low cyanide wastewater is carried out to broken cyanide generally to be adopted: chemical oxidization method, biological oxidation process, natural degradation method etc., these methods length consuming time is larger aspect the input of equipment.
The processing of cyanide wastewater is when carrying out with traditional method, and expert is also finding a low input, high clearance, the treatment process that cost performance is high both at home and abroad.
Summary of the invention
The object of the invention is to propose a kind of broken cyanide method of cyanide wastewater.
The present invention adopts following technical scheme to achieve these goals:
A broken cyanide method for cyanide wastewater, is characterized in that: comprise following concrete steps:
A. cyanide wastewater is risen to 60～110 ℃ through heat exchange;
B. in cyanide wastewater, according to the mol ratio of cyanogen root and formaldehyde, be that 1:0.5～3 add formaldehyde, the reaction times is 0.1～2h;
C. in cyanide wastewater, according to the mol ratio of cyanogen root and sodium hydroxide, be that 1:1～5 add sodium hydroxide, the reaction times is 1～5h.
The broken cyanide method of described a kind of cyanide wastewater, is characterized in that, the treatment temp of described cyanide wastewater is 95 ℃.
The broken cyanide method of described a kind of cyanide wastewater, is characterized in that, the mol ratio of cyanogen root and formaldehyde is 1:1.2.
The broken cyanide method of described a kind of cyanide wastewater, is characterized in that, the reaction times of formaldehyde and cyanide wastewater is 0.5h.
The broken cyanide method of described a kind of cyanide wastewater, is characterized in that, the mol ratio of cyanogen root and sodium hydroxide is 1:3.1.
The broken cyanide method of described a kind of cyanide wastewater, is characterized in that, the reaction times of sodium hydroxide and cyanide wastewater is 2h.
The broken cyanide method of described a kind of cyanide wastewater, is characterized in that, CN in cyanide wastewater
-concentration is greater than 300mg/L.
The broken cyanide method of described a kind of cyanide wastewater, is characterized in that, CN in cyanide wastewater
-concentration is 300～5000mg/L.
Principle equation of the present invention is as follows:
Reaction scheme of the present invention as shown in Figure 1.
Beneficial effect of the present invention:
1. the present invention can remove CN
-concentration is greater than the cyanogen root in 500ppm waste water, and clearance is up to more than 99%;
The broken cyanide time of the present invention short, within 3h, can complete the broken cyanide of coupling cyanide wastewater is processed;
3. equipment required for the present invention is few, has heating equipment, reaction vessel;
4. the present invention, by the reduction that realizes cyanogen root in cyanide wastewater that cracks to cyanogen root in cyanide wastewater, eliminates with other organism in the process of microorganism continuation degraded cyanide wastewater and due to the existence of higher concentration cyanogen root in waste water, microorganism is caused the possibility of murder by poisoning.For the qualified discharge of cyanide wastewater provides further guarantee.
Accompanying drawing explanation
Fig. 1 is reaction scheme of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
Get the waste water 500ml that cyanogen root concentration is 467mg/L, be heated to 90 ℃, under agitation condition, slowly add 37%wt formaldehyde 0.87g, after 0.5h, add sheet alkali 0.9g, the concentration c 1 of cyanogen root in sampling and measuring processed waste water after 2h.
Embodiment 2
Get the waste water 4m that cyanogen root concentration is 3575mg/L
3, be heated to 85 ℃, under agitation condition, slowly add 37%wt formaldehyde 36kg, after 1h, add 40%wt liquid caustic soda 149kg, the concentration c 2 of cyanogen root in sampling and measuring processed waste water after 2h.
Embodiment 3
Get the waste water 3.5m that cyanogen root concentration is 3256mg/L
3, be heated to 100 ℃, under agitation condition, slowly add 37%wt formaldehyde 32kg, after 1h, add 40%wt liquid caustic soda 136kg, the concentration c 3 of cyanogen root in sampling and measuring processed waste water after 3h.
Table 1 has provided the contrast situation of above-mentioned three embodiment cyanogen root concentration before and after processing.
Cyanogen root concentration in table 1 different treatment method waste water
From the results shown in Table 1, according to technical scheme of the present invention, cyanide wastewater is processed, aspect the cracking of cyanogen root, obtained significant effect.
Claims (8)
1. a broken cyanide method for cyanide wastewater, is characterized in that: comprise following concrete steps:
Cyanide wastewater is risen to 60 ~ 110 ℃ through heat exchange;
In cyanide wastewater, according to the mol ratio of cyanogen root and formaldehyde, be that 1:0.5 ~ 3 add formaldehyde, the reaction times is 0.1 ~ 2h;
In cyanide wastewater, according to the mol ratio of cyanogen root and sodium hydroxide, be that 1:1 ~ 5 add sodium hydroxide, the reaction times is 1 ~ 5h.
2. a kind of broken cyanide method of cyanide wastewater according to claim 1, is characterized in that, the treatment temp of described cyanide wastewater is 95 ℃.
3. a kind of broken cyanide method of cyanide wastewater according to claim 1, is characterized in that, the mol ratio of cyanogen root and formaldehyde is 1:1.2.
4. a kind of broken cyanide method of cyanide wastewater according to claim 1, is characterized in that, the reaction times of formaldehyde and cyanide wastewater is 0.5h.
5. a kind of broken cyanide method of cyanide wastewater according to claim 1, is characterized in that, the mol ratio of cyanogen root and sodium hydroxide is 1:3.1.
6. a kind of broken cyanide method of cyanide wastewater according to claim 1, is characterized in that, the reaction times of sodium hydroxide and cyanide wastewater is 2h.
7. according to the broken cyanide method of the described a kind of cyanide wastewater of one of claim 1 ~ 6, it is characterized in that CN in cyanide wastewater
-concentration is greater than 300mg/L.
8. a kind of broken cyanide method of cyanide wastewater according to claim 7, is characterized in that CN in cyanide wastewater
-concentration is 300 ~ 5000mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410178320.6A CN104030508A (en) | 2014-04-29 | 2014-04-29 | Cyanide breaking method of cyanogen-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410178320.6A CN104030508A (en) | 2014-04-29 | 2014-04-29 | Cyanide breaking method of cyanogen-containing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104030508A true CN104030508A (en) | 2014-09-10 |
Family
ID=51461539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410178320.6A Pending CN104030508A (en) | 2014-04-29 | 2014-04-29 | Cyanide breaking method of cyanogen-containing wastewater |
Country Status (1)
| Country | Link |
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| CN (1) | CN104030508A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2598663C2 (en) * | 2014-10-13 | 2016-09-27 | Открытое акционерное общество "Иркутский научно-исследовательский институт благородных и редких металлов и алмазов" ОАО "Иргиредмет" | Method of conditioning cyanide-containing products prior to floatation extraction of nonferrous and noble metals |
| CN106698791A (en) * | 2017-01-04 | 2017-05-24 | 安徽国星生物化学有限公司 | Crystallization treatment process for ammonium salt in paraquat wastewater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59216688A (en) * | 1983-05-25 | 1984-12-06 | Tokyo Kasei Kogyo Kk | Treatment of cyanide ion-containing waste liquid |
| JP2005279571A (en) * | 2004-03-30 | 2005-10-13 | Jfe Steel Kk | Treatment method of wastewater containing cyanide |
| CN203200066U (en) * | 2013-04-18 | 2013-09-18 | 苏州顺惠有色金属制品有限公司 | Cyanogen breaking treatment device of high-concentration cyanide-containing waste water |
-
2014
- 2014-04-29 CN CN201410178320.6A patent/CN104030508A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59216688A (en) * | 1983-05-25 | 1984-12-06 | Tokyo Kasei Kogyo Kk | Treatment of cyanide ion-containing waste liquid |
| JP2005279571A (en) * | 2004-03-30 | 2005-10-13 | Jfe Steel Kk | Treatment method of wastewater containing cyanide |
| CN203200066U (en) * | 2013-04-18 | 2013-09-18 | 苏州顺惠有色金属制品有限公司 | Cyanogen breaking treatment device of high-concentration cyanide-containing waste water |
Non-Patent Citations (1)
| Title |
|---|
| 李德永等: "含氰废水的处理方法", 《山西化工》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2598663C2 (en) * | 2014-10-13 | 2016-09-27 | Открытое акционерное общество "Иркутский научно-исследовательский институт благородных и редких металлов и алмазов" ОАО "Иргиредмет" | Method of conditioning cyanide-containing products prior to floatation extraction of nonferrous and noble metals |
| CN106698791A (en) * | 2017-01-04 | 2017-05-24 | 安徽国星生物化学有限公司 | Crystallization treatment process for ammonium salt in paraquat wastewater |
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Application publication date: 20140910 |