CN100509644C - Treatment method of calcium carbide waste water - Google Patents
Treatment method of calcium carbide waste water Download PDFInfo
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- CN100509644C CN100509644C CNB2006100511981A CN200610051198A CN100509644C CN 100509644 C CN100509644 C CN 100509644C CN B2006100511981 A CNB2006100511981 A CN B2006100511981A CN 200610051198 A CN200610051198 A CN 200610051198A CN 100509644 C CN100509644 C CN 100509644C
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- calcium carbide
- standard
- wastewater treatment
- water outlet
- waste water
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The process of treating calcium carbide waste water from generating acetylene with calcium carbide includes the following steps: the reaction between waste water and added ferrous sulfate in the reaction tank, pumping to the pipeline mixer, mixing with added flocculant in the pipeline mixer, treating in the waste water treating apparatus, adding 5% concentration dilute sulfuric acid solution to regulate pH value in the monitoring pond, adsorbing with added active carbon in the active carbon device and exhausting the effluent reaching the draining standard. The said process can eliminate COD, SS and sulfide from calcium carbide waste water effectively.
Description
Technical field: the present invention relates to the processing of calcium carbide waste water, the particularly a kind of method that can remove a kind of calcium carbide wastewater treatment of COD, SS and sulfide in the higher calcium carbide waste water.
Background technology: the calcium carbide wastewater treatment is preliminary sedimentation tank ten sour ten aerations, ten lime, ten second ponds, ten flocculation reactions 13 heavy ponds ten to be set filter ten charcoal absorptions, ten monitoring ponds in the prior art.Its shortcoming has; The first, add the hydrogen sulfide that sour aeration diffuses out and cause the secondary pollution stench, and absorb the complex process of handling hydrogen sulfide, the cost height; The second, the COD clearance only is 50～60%, and handling with charcoal absorption can be up to standard, saturated but gac is easy to; The 3rd, complex treatment process is difficult to operation control, and power consumption is high, one-time investment cost height.
Summary of the invention: the object of the present invention is to provide a kind of method of calcium carbide wastewater treatment, utilizing this method to handle calcium carbide waste water, to reach investment little, instant effect, stable effluent quality, is convenient to management and operation, can realize the purpose of automatization control.
Formation of the present invention: calcium carbide clear liquid waste water is introduced into reactive tank 1, add the copperas solution reaction, enter pump again and suck tank 2, enter line mixer 3 by in-line pump, in line mixer 3, add flocculation agent and carry out thorough mixing, enter calcium carbide wastewater treatment equipment 4, water outlet enters monitoring pond 5, the dilute sulphuric acid that adds concentration 5% in monitoring pond 5 is regulated PH, water outlet reaches the first discharge standard of " integrated wastewater discharge standard " GB8978-1996 of country, and not up to standard discharges to gac device 6 adsorption treatment back up to standard; Concentrate through flocculation reaction, suspension clarification, tube settling, filtration and mud in calcium carbide wastewater treatment equipment 4, water outlet enters monitoring pond 5.
In monitoring pond 5, PH, COD on-line monitoring instrument are set, dilute sulphuric acid adding monitoring neutralizes in the pond, control by PH on-line monitoring instrument, and pH value is controlled between 6～9, standard discharge, if water outlet COD slightly exceeds standard, calcium carbide wastewater treatment equipment 4 flowing water Valves automatically switch to gac device 6 adsorption treatment, guarantee the water outlet qualified discharge.
The amount that adds the copperas solution in the reactive tank 1 is to control with the pH value that is arranged on the PH on-line monitoring instrument in the reactive tank 1, and pH value is controlled between the 9-10.
Compared with the prior art, the present invention has the following advantages: the first, and the sulfide in the calcium carbide waste water is controlled by the pH value of PH on-line monitoring instrument if any bigger variation, adjust the dosage of copperas solution in good time automatically, keep pH value and get final product between being controlled at 9～10; The second, non-secondary pollution hydrogen sulfide produces; The 3rd, a whole set of treatment process can realize automatic control, is easy to management maintenance, and cost of investment is about 1/2 of existing treatment process; The 4th, calcium carbide wastewater treatment equipment processing efficiency height can guarantee the continuity and the stability of water outlet.
Description of drawings; Accompanying drawing 1 is a process flow sheet of the present invention.
1. reactive tanks among the figure, 2. pump sucks tank, 3. line mixer, 4. calcium carbide wastewater treatment equipment, 5. monitoring pond, 6. gac device.
Embodiment: shown in process flow sheet, calcium carbide waste water under the ordinary production situation is from carbide slag field waste line, be introduced into reactive tank 1, add the copperas solution reaction, suck tank 2 through entering pump behind the reactive tank, enter line mixer 3 by in-line pump, in line mixer 3, add anionic polyacrylamide and carry out thorough mixing, enter calcium carbide wastewater treatment equipment 4, therein through flocculation reaction, clarification suspends, tube settling, foam filter pearl is filtered and mud concentrates, water outlet enters monitoring pond 5, and in the monitoring pond PH is set, COD on-line monitoring instrument; The dilute sulphuric acid that adds concentration 5% in the monitoring pond is regulated PH, the add-on of dilute sulphuric acid is by the PH on-line monitoring instrument control that is arranged in the monitoring pond, standard discharge or COD exceed standard, and automatically switch to gac device 6 by calcium carbide wastewater treatment equipment 4 flowing water Valves and further handle the back qualified discharge; The FeS black mud that produces enters the collection mud sump, handles by press filtration and fixed point landfill.
Reaction equation:
FeSO
4+S
2-＝FeS↓+SO
4 2-Ca
2++SO
4 2-＝CaSO
4↓OH
-+H
+＝H
2O
It is constant to add ferrous sulfate reagent requirement compound concentration, whether capacity is to control with the pH value that is arranged on the PH on-line monitoring instrument in the reactive tank 1, and pH value is controlled between the 9-10, because of pH value in this scope belongs to an order of magnitude, can guarantee to add the stability and the continuity of the amount of ferrous sulfate reagent, by follow-up flocculation reaction, sludge settling, after filtration and mud concentrate, the COD of water outlet and sulfide qualified discharge, in monitoring pond 5, add the sulfuric acid neutralization, guarantee that pH value is controlled at 6～9 scope, finally guard the pond water outlet and reach " integrated wastewater discharge standard " GB8978-1996 of country first discharge standard.
Operating check and precaution:
1. the judgement of medicine usage quantity is determined: add FeSO
4Behind the solution control reactive tank 1 in pH value between 9～10.
Take a sample once at monitoring pond 5 import sampling spots every half an hour, observe effluent quality, to adjust FeSO
4Solution and flocculant solution dosage guarantee effluent quality.
A. with beaker sampling, leave standstill clarification after, FeSO takes a morsel
4Solution splashes into supernatant liquor, if no black FeS produces, then shows FeSO
4Solution capacity or excessive, suitably trace is turned FeSO down
4The solution dosage is to be adjusted to optimal coagulant dose gradually.
B. with beaker sampling, leave standstill clarification after, FeSO takes a morsel
4Solution splashes into supernatant liquor, if there is black FeS to produce, then shows FeSO
4The solution deficiency is transferred big FeSO immediately
4The solution dosage is to be adjusted to optimal coagulant dose gradually.
C. with the beaker sampling, when the observation alumen ustum was very big, suitably trace reduced flocculant dosage.
D. with beaker sampling, it is very little or when not having alumen ustum to observe alumen ustum, increases flocculant dosage immediately.
E. optimal coagulant dose is observed by water intaking does not just have black FeS generation, and the alumen ustum size is about 2～3mm, and 10 minutes sludge settling ratio is 30～40%.
2. precaution in service:
A. change in time adjustment operating parameter and medicine dosage along with handling load variations or composition (COD, sulfide and suspended substance etc.).
B. per tour detects once former water suspension, sulfide and COD, and notes down.
C. detect water suspension when being higher than 70mg/L, analyze reason, take following countermeasure:, should increase the flocculation agent dosage if suspended substance is too high; Spoil disposal in time, and shortening sludge discharging period.
The operation effluent quality is more stable continuously from July 18,13 days to 2006 July in 2006 in the present invention, and average effluent quality all reaches " integrated wastewater discharge standard " GB8979-1996 of country first discharge standard; The COD clearance is greater than more than 95%, and the S clearance is greater than more than 85%, S
2-Clearance is greater than more than 99.9%.
Inlet and outlet water water quality table
| Project | PH | COD | SS | S 2- |
| Water inlet | ≤13 | ≤2000mg/L | ≤200mg/L | ≤800mg/ |
| Water outlet | ||||
| 6～9 | ≤100mg/L | ≤70mg/L | ≤1.0mg/L |
Claims (3)
1. the method for a calcium carbide wastewater treatment, it is characterized in that: calcium carbide clear liquid waste water is introduced into reactive tank (1), add the copperas solution reaction, enter pump again and suck tank (2), enter line mixer (3) by in-line pump, in line mixer (3), add flocculation agent and carry out thorough mixing, enter calcium carbide wastewater treatment equipment (4), water outlet enters monitoring pond (5), the dilute sulphuric acid that adds concentration 5% in monitoring pond (5) is regulated PH, water outlet reaches the first discharge standard of " integrated wastewater discharge standard " GB8978-1996 of country, and not up to standard discharges to gac device (6) adsorption treatment back up to standard; Concentrate through flocculation reaction, suspension clarification, tube settling, filtration and mud in calcium carbide wastewater treatment equipment (4), water outlet enters monitoring pond (5).
2. the method for a kind of calcium carbide wastewater treatment according to claim 1, it is characterized in that: in monitoring pond (5), PH, COD on-line monitoring instrument are set, dilute sulphuric acid adds neutralization and is controlled by PH on-line monitoring instrument, and pH value is controlled between 6～9, standard discharge, if water outlet COD slightly exceeds standard, calcium carbide wastewater treatment equipment (4) flowing water Valve automatically switches to gac device (6) adsorption treatment, guarantees the water outlet qualified discharge.
3. the method for a kind of calcium carbide wastewater treatment according to claim 1, it is characterized in that: the copperas solution that adds in the reactive tank (1) is to control with the pH value that is arranged on the PH on-line monitoring instrument in the reactive tank (1), and pH value is controlled between the 9-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100511981A CN100509644C (en) | 2006-08-25 | 2006-08-25 | Treatment method of calcium carbide waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100511981A CN100509644C (en) | 2006-08-25 | 2006-08-25 | Treatment method of calcium carbide waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1911826A CN1911826A (en) | 2007-02-14 |
| CN100509644C true CN100509644C (en) | 2009-07-08 |
Family
ID=37720925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100511981A Expired - Fee Related CN100509644C (en) | 2006-08-25 | 2006-08-25 | Treatment method of calcium carbide waste water |
Country Status (1)
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| CN (1) | CN100509644C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102295358A (en) * | 2010-06-22 | 2011-12-28 | 天津滨海鼎昇环保科技工程有限公司 | Hierarchical coagulation treatment process for carbide slag wastewater |
| CN103771418B (en) * | 2012-10-19 | 2016-04-13 | 湖北楚星化工股份有限公司 | A kind of method and device improving wastewater zero discharge in calcium carbide production |
| CN109650650A (en) * | 2018-12-17 | 2019-04-19 | 北京航天环境工程有限公司 | A kind of processing system and application of petrochemical industry sewage |
-
2006
- 2006-08-25 CN CNB2006100511981A patent/CN100509644C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 电石渣浆水的循环利用. 王会昌等.中国氯碱，第4期. 2003 |
| 电石渣浆水的循环利用. 王会昌等.中国氯碱，第4期. 2003 * |
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|---|---|
| CN1911826A (en) | 2007-02-14 |
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Granted publication date: 20090708 Termination date: 20120825 |