CN102992512A - Treatment method of industrial wastewater - Google Patents
Treatment method of industrial wastewater Download PDFInfo
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- CN102992512A CN102992512A CN2012103871927A CN201210387192A CN102992512A CN 102992512 A CN102992512 A CN 102992512A CN 2012103871927 A CN2012103871927 A CN 2012103871927A CN 201210387192 A CN201210387192 A CN 201210387192A CN 102992512 A CN102992512 A CN 102992512A
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Abstract
The invention discloses a treatment method of industrial wastewater. The method comprises the steps of: adequately neutralizing acid-alkali wastewater through air agitation in a reaction pool, initially adjusting pH of wastewater from 1 to 2-3, then adding Ca(OH)2 or NaOH to realize an expected pH value 6-9; neutralizing reacted wastewater and pumping the wastewater into a settling pond, wherein suspended solids in the wastewater precipitate in the settling pond, and the liquid supernatant flows into an oxidation pond; discharging sludge at the bottom of the settling pond to a sludge thickener to be stored; the liquid supernatant is aerated in the oxidation pond, and the aerating time is greater than or equal to 30minutes, so that ions are oxidized and flow into a secondary settling pond; and after the suspended solids and ferric oxide are precipitated by the secondary settling pond, the liquid supernatant reaches the three-level emission standard and is discharged and recycled. The treatment method of industrial wastewater provided by the invention is reasonable in flow of a design process, and turns the harm into a benefit; the wastewater is recycled, so that the emission of wastewater is remarkably reduced, and the water resource is saved; the treatment efficiency is high and the treatment cost is lowered; the treatment method of industrial wastewater has remarkable social and economic benefits.
Description
Technical field
The invention discloses a kind of process for treating industrial waste water, particularly a kind of acid-bearing wastewater treatment process is applicable to Steel-rolling Industry pickling lines treatment system.
Background technology
Along with the continuous expansion of enterprise's production capacity, the wastewater flow rate that industry produces is increasing, and the environmental improvement problem is on the rise.Enterprise has taked multinomial measure to administer, but DeGrain.Particularly steel rolling production-line all needs to use the pickling workpiece in the production process of every day, can produce a large amount of discarded acid waste water in acid cleaning process.This has not only caused serious pollution and a large amount of remaining acid to waste to environment.Pickling refers to remove according to certain concentration, temperature, speed with acid solution the process of the iron scale on the steel surface.Iron scale on the steel surface all is the basic oxide that are not dissolved in water, and its thickness is generally at 5-20um, because their linear expansivity is less than steel, when coils of hot-rolled steel cooled off, the surface formed many microfractures.When their steep in the acid solution or when acid solution is washed away, these basic oxide are just in acid solution generation series of chemical, simultaneously, iron scale on carbon steel or the surface of low-alloy steel is more loose, even crack and hole are arranged (when iron scale when densification and leakless and hole, can adopt brokenly the phosphorus machine to break phosphorus), so adopt sulfuric acid washing when acid solution and iron scale react, react with the basic iron of iron and steel by its crack and hole; When adopting chlorohydric acid pickling, acid solution is the dissolved oxygen iron sheet fast, and seldom corrodes the matrix of iron and steel.Therefore Steel-rolling Industry cleans the present main chlorohydric acid pickling that adopts of iron scale of carbon steel and low alloy steel
Present conventional acid-bearing wastewater is processed, and needs to throw in a large amount of Ca (OH)
2Or NaOH carries out acid-base neutralisation, reaches the expection treatment effect.And Ca (OH)
2Price is lower, and neutralization is not good enough, but the good price of NaOH neutralization is higher, and long-term a large amount of the use caused this rising of production.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of and have that the water reuse rate is high, quantity discharged reduces, cost is low, the method for wastewater treatment of emission compliance.
For achieving the above object, the invention discloses following technology contents
A kind of process for treating industrial waste water is characterized in that: carry out as follows:
(1) makes and contain acidic and alkaline waste water and flow into chemical reaction pond, in reaction tank, by pneumatic blending acidic and alkaline waste water is fully neutralized, tentatively adjust the pH value of waste water and adjust to pH ﹦ 2-3 by pH ﹦ 1, add again Ca (OH)
2Or NaOH reaches expection pH value 6-9; Sewage after the neutralization reaction pumps into settling tank, and the suspended substance in the waste water precipitates in settling tank, and supernatant liquor flows into oxidation pond; The pool bottom sludge of settling tank is discharged to sludge thickener and stores; By aeration, aeration time 〉=30min makes ferrous ion be oxidized to ferric ion to supernatant liquor at oxidation pond, flows into secondary sedimentation basins, and suspended substance and ferric oxide are through after the precipitation of the heavy pond of secondary, and supernatant liquor reaches three grades of emission standards and emits recycling;
(2) the secondary sedimentation basins throw out is got back to chemical reaction pond, and the pool bottom sludge of settling tank enters sludge thickener, slush pump top hole pressure 5-6kgf/cm
2, the mud of sludge thickener is pumped into pressure filter, mud is through Filter Press, and its pressure is that 0.8-1Mpa is pressed into the mud cake outward transport; Filter pressing water is got back to chemical reaction pond.
The more concrete technical scheme of the present invention is:
(1) acid-bearing wastewater and contain alkali waste water → chemical reaction pond and (add Ca (OH)
2Or NaOH) → settling tank → aeration oxidation pond → secondary sedimentation basins → supernatant liquor stream → recycling.The secondary sedimentation basins throw out is got back to chemical reaction pond.
(2) settling tank (mud) → sludge thickener → slush pump → pressure filter → mud cake outward transport.Filter pressing water is got back to chemical reaction pond.
Referring to accompanying drawing 1, the acid-bearing wastewater that produces in the production process enters chemical reaction pond 1, to contain simultaneously alkali waste water and introduce reaction tank 1, in reaction tank, make acid-bearing wastewater by pneumatic blending and contain alkali waste water and fully neutralize, the preliminary pH value (adjusting to pH=2-3 by pH ﹦ 1) of adjusting waste water adds Ca (OH) again
2Or NaOH reaches expection pH value (pH ﹦ 6=9); Pump into settling tank 2 through the sewage after the neutralization reaction, the suspended substance in the waste water is in settling tank 2 interior precipitations, and supernatant liquor flows into oxidation pond 3; The pool bottom sludge of settling tank 2 is discharged to sludge thickener 5 and stores; Waste water makes the iron ion oxidation at oxidation pond 3 by aeration, and aeration time 〉=30min flows into second pond 4, and suspended substance and ferric oxide are through after second pond 4 precipitations, and supernatant liquor reaches three grades of emission standards (SS≤400/1/PH ≡ 6-9) and emits recycling.Pond, second pond 4 shallow lake throw out is got back to chemical reaction pond 1.
The pool bottom sludge of settling tank 2 enters sludge thickener 5, and slush pump 6 pumps into pressure filter 7 with the mud of sludge thickener 5, and mud is pressed into the mud cake outward transport through pressure filter 7.Filter pressing water is got back to chemical reaction pond 1.
Positively effect of the present invention
(1) utilizes the neutralizing effect that contains alkali waste water and acid-bearing wastewater that produces in process of production, realize turning bane into boon; The water reuse rate is high, quantity discharged reduces saving water resource; Reduced Ca (OH)
2Or the injected volume of NaOH (actual injected volume only have former injected volume 1/4-1/5), reduced cost; Discharging reaches three grades of emission standards (SS≤400/1, PH ≡ 6-9).
(2) design process flow of the present invention is reasonable, turns bane into boon; Realize recycling of waste water, significantly reduced the discharging of waste water, saved water resources; Processing efficiency is high, has reduced processing cost; Has obvious Social benefit and economic benefit.
Description of drawings
Fig. 1 is a kind of process for treating industrial waste water treatment scheme synoptic diagram; Among the figure: chemical reaction pond 1, settling tank 2, aeration oxidation pond 3, second pond 4, sludge thickener 5, slush pump 6, pressure filter 7.
Embodiment
In order to explain more fully enforcement of the present invention, provide following preparation method's embodiment.These embodiments only are to explain rather than limit the scope of the invention.Agents useful for same of the present invention all has commercially available.
Embodiment 1
The acid-bearing wastewater that produces in the production process flows into chemical reaction pond 1, to contain simultaneously alkali waste water and introduce reaction tank 1, in reaction tank, make acid-bearing wastewater by pneumatic blending and contain alkali waste water and fully neutralize, tentatively adjust the pH value (adjusting to pH=2-3 by pH ﹦ 1) of waste water, add again Ca (OH)
2Or NaOH reaches expection pH value (pH ﹦ 6=9); Pump into settling tank 2 through the sewage after the neutralization reaction, the suspended substance in the waste water is in settling tank 2 interior precipitations, and supernatant liquor flows into oxidation pond 3; The pool bottom sludge of settling tank 2 is discharged to sludge thickener 5 and stores; Waste water makes iron ion oxidation (ferrous ion is oxidized to trivalent) at oxidation pond 3 by aeration, aeration time 60min, flow into second pond 4, suspended substance and ferric oxide are through after second pond 4 precipitations, and supernatant liquor reaches three grades of emission standards (SS≤400/1/PH ≡ 6-9) and emits recycling.Pond, second pond 4 shallow lake throw out is got back to chemical reaction pond 1.The pool bottom sludge of settling tank 2 enters sludge thickener 5, and slush pump 6 pumps into pressure filter 7 with the mud of sludge thickener 5, and mud is pressed into the mud cake outward transport through pressure filter 7.Filter pressing water is got back to chemical reaction pond 1.
Present method has significantly reduced the discharging of waste water, has saved water resources; The processing efficiency height that turns bane into boon has reduced processing cost; Has obvious Social benefit and economic benefit.
Embodiment 2
A kind for the treatment of process of trade effluent, carry out as follows:
(1) contains acid, alkali waste water inflow chemical reaction pond, in reaction tank, by pneumatic blending acid, alkali waste water are fully neutralized, tentatively adjust the pH value of waste water and adjust to pH ﹦ 3 by pH ﹦ 1, add again Ca (OH)
2Or NaOH reaches expection pH value 6; Sewage after the neutralization reaction pumps into settling tank, and the suspended substance in the waste water precipitates in settling tank, and supernatant liquor flows into oxidation pond; The pool bottom sludge of settling tank is discharged to sludge thickener and stores; By aeration, aeration time 50min makes ferrous ion be oxidized to ferric ion to supernatant liquor at oxidation pond, flows into secondary sedimentation basins, and suspended substance and ferric oxide are through after the precipitation of the heavy pond of secondary, and supernatant liquor reaches three grades of emission standards and emits recycling;
(2) the secondary sedimentation basins throw out is got back to chemical reaction pond, and the pool bottom sludge of settling tank enters sludge thickener, slush pump top hole pressure 6kgf/cm
2, the mud of sludge thickener is pumped into pressure filter, mud is through Filter Press, and pressure 0.8Mpa is pressed into the mud cake outward transport; Filter pressing water is got back to chemical reaction pond.
Embodiment 3
A kind for the treatment of process of trade effluent, carry out as follows:
(1) contains acid, alkali waste water inflow chemical reaction pond, in reaction tank, by pneumatic blending acid, alkali waste water are fully neutralized, tentatively adjust the pH value of waste water and adjust to pH ﹦ 3 by pH ﹦ 1, add again Ca (OH)
2Or NaOH reaches expection pH value 9; Sewage after the neutralization reaction pumps into settling tank, and the suspended substance in the waste water precipitates in settling tank, and supernatant liquor flows into oxidation pond; The pool bottom sludge of settling tank is discharged to sludge thickener and stores; By aeration, aeration time 80min makes ferrous ion be oxidized to ferric ion to supernatant liquor at oxidation pond, flows into secondary sedimentation basins, and suspended substance and ferric oxide are through after the precipitation of the heavy pond of secondary, and supernatant liquor reaches three grades of emission standards and emits recycling;
(2) the secondary sedimentation basins throw out is got back to chemical reaction pond, and the pool bottom sludge of settling tank enters sludge thickener, slush pump top hole pressure 6kgf/cm
2, the mud of sludge thickener is pumped into pressure filter, mud is through Filter Press, and pressure 1Mpa is pressed into the mud cake outward transport; Filter pressing water is got back to chemical reaction pond.
Embodiment 4
Simultaneous test
Conventional method:
Step is: (1) acid-bearing wastewater → chemical reaction pond (adds Ca (OH)
2Or NaOH) → settling tank → aeration oxidation pond → secondary sedimentation basins → supernatant liquor stream → recycling.The secondary sedimentation basins throw out is got back to chemical reaction pond.
(2) settling tank (mud) → sludge thickener → slush pump → pressure filter → mud cake outward transport.Filter pressing water is got back to chemical reaction pond.
Method of the present invention:
Step is: (1) acid-bearing wastewater and contain alkali waste water → chemical reaction pond and (add Ca (OH)
2Or NaOH) → and settling tank → aeration oxidation pond → secondary sedimentation basins → supernatant liquor stream → recycling, the secondary sedimentation basins throw out is got back to chemical reaction pond.
(2) settling tank (mud) → sludge thickener → slush pump → pressure filter → mud cake outward transport.Filter pressing water is got back to chemical reaction pond.
Acid-bearing wastewater enters chemical reaction pond, will contain simultaneously alkali waste water and introduce reaction tank, makes acid-bearing wastewater and contain alkali waste water fully to neutralize in reaction tank, adjusts the pH value (adjusting to pH=2～3 by pH ﹦ 1) of waste water, adds Ca (OH) again
2Or NaOH reaches expection pH value (pH ﹦ 6～9); The medicament delivery amount only has 1/4～1/5 of former injected volume.
Claims (1)
1. the treatment process of a trade effluent is characterized in that: carry out as follows:
(1) makes and contain acidic and alkaline waste water and flow into chemical reaction pond, in reaction tank, by pneumatic blending acidic and alkaline waste water is fully neutralized, tentatively adjust the pH value of waste water and adjust to pH ﹦ 2-3 by pH ﹦ 1, add again Ca (OH)
2Or NaOH reaches expection pH value 6-9; Sewage after the neutralization reaction pumps into settling tank, and the suspended substance in the waste water precipitates in settling tank, and supernatant liquor flows into oxidation pond; The pool bottom sludge of settling tank is discharged to sludge thickener and stores; By aeration, aeration time 〉=30min makes ferrous ion be oxidized to ferric ion to supernatant liquor at oxidation pond, flows into secondary sedimentation basins, and suspended substance and ferric oxide are through after the precipitation of the heavy pond of secondary, and supernatant liquor reaches three grades of emission standards and emits recycling;
(2) the secondary sedimentation basins throw out is got back to chemical reaction pond, and the pool bottom sludge of settling tank enters sludge thickener, slush pump top hole pressure 5-6kgf/cm
2, the mud of sludge thickener is pumped into pressure filter, mud is through Filter Press, and its pressure is that 0.8-1Mpa is pressed into the mud cake outward transport; Filter pressing water is got back to chemical reaction pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103871927A CN102992512A (en) | 2012-10-15 | 2012-10-15 | Treatment method of industrial wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103871927A CN102992512A (en) | 2012-10-15 | 2012-10-15 | Treatment method of industrial wastewater |
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| CN102992512A true CN102992512A (en) | 2013-03-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105523660A (en) * | 2014-10-22 | 2016-04-27 | 大足县远大废旧金属加工有限公司 | System for purifying waste water from waste and old iron sheet processing as well as purifying method thereof |
| CN106865847A (en) * | 2017-04-19 | 2017-06-20 | 广东赛威赢环境技术工程有限公司 | A kind of high content acid wastewater recycling processing method |
| CN111217510A (en) * | 2018-11-26 | 2020-06-02 | 中国矿业大学(北京) | Method for eliminating saponification of steel rolling acid sludge |
| CN113788520A (en) * | 2021-10-08 | 2021-12-14 | 北京首钢吉泰安新材料有限公司 | Iron-chromium-aluminum pickling process, wastewater treatment method and wastewater treatment device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020009956A (en) * | 2000-07-28 | 2002-02-02 | 김화지 | Apparatus and method for waste water processing contain heavy metal and a pollutant non decomposition |
| US20040112836A1 (en) * | 2002-12-11 | 2004-06-17 | Manz David Harold | Oil and gas well fracturing (frac) water treatment process |
| JP2006116384A (en) * | 2004-10-19 | 2006-05-11 | Hoshizaki Electric Co Ltd | Treatment method of sewage containing phosphoric acid-based component |
| CN101041536A (en) * | 2007-04-30 | 2007-09-26 | 李保标 | Integrated waste water treating machine |
| CN101811792A (en) * | 2009-02-24 | 2010-08-25 | 宝山钢铁股份有限公司 | Processing method of stainless steel cold rolling pickling wastewater |
| CN201729727U (en) * | 2010-08-19 | 2011-02-02 | 天津市亿博制钢有限公司 | Industrial wastewater treatment device |
| CN101993158A (en) * | 2009-08-28 | 2011-03-30 | 宁波宝新不锈钢有限公司 | Method for treating stainless steel cold rolling pickling waste water |
| CN102010087A (en) * | 2010-12-16 | 2011-04-13 | 北京中兵北方环境科技发展有限责任公司 | Method for treating nitro-cotton acid wastewater |
-
2012
- 2012-10-15 CN CN2012103871927A patent/CN102992512A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020009956A (en) * | 2000-07-28 | 2002-02-02 | 김화지 | Apparatus and method for waste water processing contain heavy metal and a pollutant non decomposition |
| US20040112836A1 (en) * | 2002-12-11 | 2004-06-17 | Manz David Harold | Oil and gas well fracturing (frac) water treatment process |
| JP2006116384A (en) * | 2004-10-19 | 2006-05-11 | Hoshizaki Electric Co Ltd | Treatment method of sewage containing phosphoric acid-based component |
| CN101041536A (en) * | 2007-04-30 | 2007-09-26 | 李保标 | Integrated waste water treating machine |
| CN101811792A (en) * | 2009-02-24 | 2010-08-25 | 宝山钢铁股份有限公司 | Processing method of stainless steel cold rolling pickling wastewater |
| CN101993158A (en) * | 2009-08-28 | 2011-03-30 | 宁波宝新不锈钢有限公司 | Method for treating stainless steel cold rolling pickling waste water |
| CN201729727U (en) * | 2010-08-19 | 2011-02-02 | 天津市亿博制钢有限公司 | Industrial wastewater treatment device |
| CN102010087A (en) * | 2010-12-16 | 2011-04-13 | 北京中兵北方环境科技发展有限责任公司 | Method for treating nitro-cotton acid wastewater |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105523660A (en) * | 2014-10-22 | 2016-04-27 | 大足县远大废旧金属加工有限公司 | System for purifying waste water from waste and old iron sheet processing as well as purifying method thereof |
| CN106865847A (en) * | 2017-04-19 | 2017-06-20 | 广东赛威赢环境技术工程有限公司 | A kind of high content acid wastewater recycling processing method |
| CN111217510A (en) * | 2018-11-26 | 2020-06-02 | 中国矿业大学(北京) | Method for eliminating saponification of steel rolling acid sludge |
| CN111217510B (en) * | 2018-11-26 | 2021-09-07 | 中国矿业大学(北京) | Method for eliminating saponification of steel rolling acid sludge |
| CN113788520A (en) * | 2021-10-08 | 2021-12-14 | 北京首钢吉泰安新材料有限公司 | Iron-chromium-aluminum pickling process, wastewater treatment method and wastewater treatment device |
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Application publication date: 20130327 |