CN102653437A - Method for treating yellow sludge obtained in neutralization of steel pickling waste water lime - Google Patents
Method for treating yellow sludge obtained in neutralization of steel pickling waste water lime Download PDFInfo
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- CN102653437A CN102653437A CN2011104466223A CN201110446622A CN102653437A CN 102653437 A CN102653437 A CN 102653437A CN 2011104466223 A CN2011104466223 A CN 2011104466223A CN 201110446622 A CN201110446622 A CN 201110446622A CN 102653437 A CN102653437 A CN 102653437A
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Abstract
The invention relates to a method for treating yellow sludge obtained in neutralization of steel pickling waste water lime and belongs to the technical field of waste water treatment. The method for treating the yellow sludge obtained in neutralization of the steel pickling waste water lime comprises the following steps of: adding the filtered yellow sludge into a reaction tank by use of a sludge pump; adding iron acid water which comes from a pickling workshop and has the pH value of less than 2 into the yellow sludge, carrying out aeration, adjusting the pH value to be 4.5-5.5 and then filtering again; conveying yellowish-brown oxidized sludge into a heating bath, carrying out aeration, and stirring for oxidization; adjusting the pH value to be 10.5-11.5 by lime liquor, then heating to 100-130 DEG C by steam, and carrying out heat preservation for 25-50 minutes; adding sewage which is filtered again and has the pH value of 4.5-5.5, adjusting the pH value to be 6.5-7.5, and finishing the reaction; and finally, cooling to 45-55 DEG C, and filtering to obtain black magnetic iron-containing sludge. The method has the advantages of being simple in technology, convenient in operation, easy to control, low in processing cost and high in treatment efficiency, avoiding environmental pollution, changing a pollution source into a renewable resource, and the like.
Description
Technical field
The invention belongs to the steel pickling waste liquor processing technology field, particularly relate in a kind of steel pickling waste liquor lime and the treatment process of back yellow mud.
Background technology
At present; Produce a large amount of poaching wastewaters in the iron and steel processing enterprise acid cleaning process; The staple of waste water is the aqueous solution that contains the FeCl2 or the FeS04 of sour pH value≤2; Oxidation by air forms tervalent iron protoxide red precipitate when the air of waste water and occurring in nature contacts, and causes the muddy polluted source of water.
Pickling iron and steel enterprise pickling waste waters generally adopts cheap basic treatment agent lime (quicklime) that acid-bearing wastewater is carried out neutralizing treatment in sewage treatment process; Treatment process be with lime blunge dissolving back form calcium hydroxide add in the acid-bearing wastewater, make the acid waste water pH value reach the neutrality of 6-8 after filter and press filtration after sewage again through pipe network get into advanced treatment and reclamation or discharging equation be FeCl2+Ca (OH) 2=Fe (OH) 2 ↓+CaClOOH is because of the very little not dissolving fully in the neutralization reaction process of the solubleness of quicklime in water; Therefore produce the industrial sludge that a large amount of oxide compounds can not be dissolved in the water and produced after press filtration by ferrous ion coating formation Fe (OH) 3a-FeOOH, mud mixture and become the tawny pollutent; In the middle of depositing and transporting, can produce polluting the second time of environment; Do not have because of the iron content magnitude is low utility value at present existing treating method be to handle the back landfill through the producer that has qualification to handle, brought serious economical load and to the pollution of environment to enterprise.
Summary of the invention
The technical problem of the present invention for existing in the solution known technology, and provide in a kind of steel pickling waste liquor lime and the treatment process of back yellow mud.
The purpose of this invention is to provide that a kind of to have technology simple; Easy to operate, control is easy, stable performance; Process is reliable; Processing efficiency is high, has reached the pollution that the purpose that turns waste into wealth has been avoided environment, source of pollution has been become in the steel pickling waste liquor lime of characteristics such as renewable resource the treatment process with the yellow mud in back.
The present invention is on the basis of the original WWT of pickling iron and steel enterprise; Utilize after the neutralizing treatment the tawny oxidized sludge with contain the iron waste water synthetic high iron content black magnetic breeze raw material of heating, it is simple, easy to operate to reclaim technology; Environment is not produced pollution; On environment protection treating, realized recycling economy, the change source of pollution are renewable resource, for smelting iron and steel provides main raw material.
Treating processes of the present invention: will be lower than 2 Fe-laden acid wastewater from pickling workshop pH value and squeeze in the reaction tank with acid; Add lime and make its acid-base neutralisation; Simultaneously to carrying out aeration agitation in the reaction tank; Regulate pH value=8, aeration oxidation 1 hour, the sewage after will neutralizing then filters with filter.Tawny oxidized sludge after the filtration is put in the reaction tank with pump once more, adds to be lower than 2 iron content sour water from pickling workshop pH value, and regulate pH value and equal 5, aeration oxidation and then filtration, filtered sewage turns back to reaction tank and waits for next step processing.Tawny oxidized sludge after the filtration (filter cake is put in the heating bath will (to contain crystal water 60%) after the also available pressure filter press filtration) joins in the heating bath with steam piano; In heating bath, add in the reaction tank iron waste water that contains that pH value after filtering equals 5 according to the concentration of tawny oxidized sludge; Open air aeration heating bath is carried out the oxidation stirring; Equal 12 with the PH in the lime liquid adjusting heating bath again and treat that mud stops aeration agitation when being stirred to the heavy-gravity pasty state with air aeration; The unlatching steam valve is heated; Close most of steam when spending and keep micro-steam through carrying out insulation reaction 30 minutes when the mud temperature reaches 100, observing the mud color is that chocolate can not appear in pure black, detects iron-holder and reaches 50% and be reaction end.The steam off valve stops heating, with water pump PH in the reaction tank is equaled 5 the iron waste water that contains and joins in the heating bath and to regulate pH value and equal reaction in 7 o'clock and finish.Opening the air aeration valve carries out aeration to heating bath and is cooled to 50 and squeezes into the water discharging filter cake that plate-and-frame filter press carries out after the press filtration press filtration with surge pump when spending and obtain black magnetic Z 250 mud.
The technical scheme of taking for the problem that solves the prior art existence with the treatment process of the yellow mud in back in the steel pickling waste liquor lime of the present invention is:
The treatment process of the yellow mud in the steel pickling waste liquor lime and back; The Fe-laden acid wastewater in pickling workshop is squeezed in the reaction tank with acid; Add lime and make its acid-base neutralisation; Through aeration, accent PH, filtration treatment, be characterized in: the Fe-laden acid wastewater pH value that uses yellow mud to regulate the pickling workshop is 4.5-5.5, aeration oxidation and then filtration; Tawny oxidized sludge after the filtration is transported in the heating bath, carries out the aeration agitation oxidation, uses liquor calcis to regulate pH value and is 10.5-11.5, heats to 100-130 ℃ of mud temperature with steam then, is incubated 25-50 minute; Adding warp filtration pH value is that the sewage of 4.5-5.5 cools off in heating bath, regulates pH value and equals 6.5-7.5, the reaction end; Be cooled to 45-55 ℃, filter and obtain the black magnetic iron containing sludge.
Treatment process with the yellow mud in back in the steel pickling waste liquor lime of the present invention can also adopt following technical measures:
The treatment process of the yellow mud in the described steel pickling waste liquor lime and back, be characterized in: the tawny oxidized sludge volume of water content after the filtration is 50%-85%.
With the treatment process of the yellow mud in back, be characterized in: be incubated after 25-50 minute, the mud color is a black, and iron level reaches at 50% o'clock in the described steel pickling waste liquor lime, adding when filtering once more pH value be that the sewage of 4.5-5.5 is in heating bath.
The treatment process of the yellow mud in the described steel pickling waste liquor lime and back is characterized in: after using liquor calcis adjusting pH value as 10.5-11.5, treat to stop aeration agitation when mud is stirred to the heavy-gravity pasty state with air aeration, heat with steam then.
The treatment process of the yellow mud in the described steel pickling waste liquor lime and back; Be characterized in: after reaction finishes; Utilize through the sewage of filtration pH value and in heating bath, cool off for 4.5-5.5; Open the air aeration valve simultaneously heating bath is carried out the aeration cooling, squeeze into plate-and-frame filter press with surge pump when being cooled to 45-55 ℃ and carry out press filtration, filter cake obtains black magnetic Z 250 mud.
The treatment process of the yellow mud in the described steel pickling waste liquor lime and back, be characterized in: filter cake obtains the black magnetic Z 250 mud that iron level is 50%-60%.
Advantage and positively effect that the present invention has are:
The treatment process of the yellow mud in the steel pickling waste liquor lime and back is owing to adopted brand-new technology scheme of the present invention, and compared with prior art, it is simple that the treatment process of the yellow mud in the steel pickling waste liquor lime and back has technology; Easy to operate, control is easy, stable performance; Process is reliable; Processing efficiency is high, has reached the pollution that the purpose that turns waste into wealth has been avoided environment, source of pollution has been become advantages such as renewable resource.
Description of drawings
Fig. 1 is in the steel pickling waste liquor lime of the present invention and the treatment process process flow sheet of the yellow mud in back;
Fig. 2 is a process innovation part process flow sheet of the present invention.
Embodiment
For further understanding technology contents of the present invention, characteristics and effect, the following examples of giving an example now, and be described with reference to the accompanying drawings as follows:
Consult accompanying drawing 1 and Fig. 2.
Embodiment 1
The treatment process of the yellow mud in the steel pickling waste liquor lime and back, the Fe-laden acid wastewater in pickling workshop is squeezed in the reaction tank with acid, adds lime and makes its acid-base neutralisation, through aeration, accent PH, filtration treatment.The Fe-laden acid wastewater pH value that uses filter cake to regulate the pickling workshop is 4.5-5.5, aeration oxidation and then filtration; Filtration back water-content is that the tawny oxidized sludge of 50%-85% is transported in the heating bath; Carry out the aeration agitation oxidation; Use liquor calcis to regulate pH value and be 10.5-11.5; Treat that mud stops aeration agitation when being stirred to the heavy-gravity pasty state with air aeration, heat to 100-130 ℃ of mud temperature with steam then, be incubated 25-50 minute; The mud color is a black, and iron content reaches at 50% o'clock, adds that to filter pH value once more be that the sewage of 4.5-5.5 cools off in heating bath, regulates pH value simultaneously and equals 6.5-7.5, and reaction finishes; Open the air aeration valve heating bath is carried out the aeration cooling, squeeze into plate-and-frame filter press with surge pump when being cooled to 45-55 ℃ and carry out press filtration, filter cake obtains the black magnetic Z 250 mud that iron level is 50%-60%.
The concrete operations implementation process of present embodiment:
The treatment process of the yellow mud in the steel pickling waste liquor lime and back; To be lower than 2 Fe-laden acid wastewater from pickling workshop pH value and squeeze in the reaction tank, and add lime and make its acid-base neutralisation, stir carrying out the aeration oxidation in the reaction tank simultaneously with acid; Regulate pH value=8, aeration oxidation 1 hour.Sewage after will neutralizing then filters with filter; Tawny oxidized sludge after the filtration is put in the reaction tank with pump once more; Adding is lower than 2 iron content sour water from pickling workshop pH value; Regulate pH value and equal 5, aeration oxidation and then filtration, filtered sewage turns back to reaction tank and waits for next step processing.
Tawny oxidized sludge after the filtration (filter cake is put in the heating bath will (to contain crystal water 60%) after the also available pressure filter press filtration) joins in the heating bath with sludge pump; Concentration according to the tawny oxidized sludge adds in heating bath through filtering the iron waste water that contains that the back pH value equals 5 last time; Open air aeration heating bath is stirred oxidation; The PH that regulates in the heating bath with lime liquid again equals 12; Treat that mud stops aeration agitation when being stirred to the heavy-gravity pasty state with air aeration, open steam valve and heat, when the mud temperature reaches 100 ℃, close most of steam and keep micro-steam through carrying out insulation reaction 30 minutes; Observing the mud color is that chocolate can not appear in pure black, and detection mud iron-holder reaches 50% and is reaction end.The steam off valve stops heating, with water pump PH in the reaction tank is equaled 5 the iron waste water that contains and joins to cool off in the heating bath and regulate pH value simultaneously and equal reaction in 7 o'clock and finish.Open the air aeration valve heating bath is carried out the aeration cooling; When being cooled to 50 ℃; Squeeze into plate-and-frame filter press with surge pump and carry out press filtration, the water discharging filter cake after the press filtration obtains the iron mud of iron content 50%, is used for the raw material of smelting iron and steel; Stopped yellow mud after the WWT to the pollution of environment and be recovered to the higher-grade iron containing sludge, source of pollution have been become renewable resource.
Embodiment 2
The treatment process of the yellow mud in the steel pickling waste liquor lime and back, technological process is with embodiment 1, wherein; The pickling mud of moisture 85% after 10 cubes of filtrations is joined in the heating bath with sludge pump, equal 12, open steam valve the mud in the heating bath is heated 2.5 hours vapor pressure 0.2 MPas with liquor calcis adjustment pH value; When the mud temperature reaches more than 100 ℃; The steam off valve adds the iron waste water that contains of PH=5 again in heating bath, regulate PH=7 in the heating bath.The sewage gas that to heat in the pond with the air stripping tube is then mentioned the mud storage pool, joins with pneumatic diaphragm pump and carries out press filtration in the plate-and-frame filter press.Sewage discharge after the press filtration, filter cake obtains the magnetic ferroferric oxide mud of 2 cubes of black moisture 60% after the press filtration.
Present embodiment has described positively effect and advantage.
Claims (6)
- In the steel pickling waste liquor lime with the back yellow mud treatment process; The Fe-laden acid wastewater in pickling workshop is squeezed in the reaction tank with acid; Add lime and make its acid-base neutralisation; Through aeration, accent PH, filtration treatment, it is characterized in that: the Fe-laden acid wastewater pH value that uses yellow mud to regulate the pickling workshop is 4.5-5.5, aeration oxidation and then filtration; Tawny oxidized sludge after the filtration is transported in the heating bath, carries out the aeration agitation oxidation, uses liquor calcis to regulate pH value and is 10.5-11.5, heats to 100-130 ℃ of mud temperature with steam then, is incubated 25-50 minute; The adding pH value is that the iron content sewage of 4.5-5.5 cools off in heating bath, regulates pH value and equals 6.5-7.5, and reaction finishes; Be cooled to 45-55 ℃, filter and obtain the black magnetic iron containing sludge.
- 2. according to the treatment process of the yellow mud in the described steel pickling waste liquor lime of claim 1 and back, it is characterized in that: the tawny oxidized sludge volume of water content after the filtration is 50%-85%.
- According in the described steel pickling waste liquor lime of claim 1 with the back yellow mud treatment process; It is characterized in that: be incubated after 25-50 minute; The mud color is a black, and iron level reaches at 50% o'clock, and the sewage that adds pH value when filtering once more and be 4.5-5.5 carries out hypothermic response in heating bath.
- According in claim 1, the 2 or 3 described steel pickling waste liquor lime and the back yellow mud treatment process; It is characterized in that: after using liquor calcis adjusting pH value as 10.5-11.5; Treat to stop aeration agitation when mud is stirred to the heavy-gravity pasty state with air aeration, heat with steam then.
- According in claim 1, the 2 or 3 described steel pickling waste liquor lime and the back yellow mud treatment process; It is characterized in that: after reaction finishes; Use pH value to lower the temperature in the heating bath as the iron content sewage of 4.5-5.5; Open the air aeration valve simultaneously heating bath is carried out the aeration cooling, squeeze into plate-and-frame filter press with surge pump when being cooled to 45-55 ℃ and carry out press filtration, filter cake obtains black magnetic Z 250 mud.
- 6. according to the treatment process of the yellow mud in the described steel pickling waste liquor lime of claim 5 and back, it is characterized in that: filter cake obtains the black magnetic Z 250 mud that iron level is 50%-60%.
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| CN 201110446622 CN102653437B (en) | 2011-09-20 | 2011-12-28 | Method for treating yellow sludge obtained in neutralization of steel pickling waste water lime |
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| CN2011102783144A CN102358648A (en) | 2011-09-20 | 2011-09-20 | Technology for recycling of sludge obtained after neutralizing treatment of steel and iron pickling wastewater and recycling ferroferric oxide |
| CN 201110446622 CN102653437B (en) | 2011-09-20 | 2011-12-28 | Method for treating yellow sludge obtained in neutralization of steel pickling waste water lime |
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| CN 201110446622 Active CN102653437B (en) | 2011-09-20 | 2011-12-28 | Method for treating yellow sludge obtained in neutralization of steel pickling waste water lime |
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Cited By (11)
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| CN103553258A (en) * | 2013-11-13 | 2014-02-05 | 卢玉柱 | Safe recycling treatment method of waste iron/steel pickling acid |
| CN103553146A (en) * | 2013-11-13 | 2014-02-05 | 卢玉柱 | Method for preparing magnetite powder by using wasted electric lime size |
| CN103964660A (en) * | 2014-05-20 | 2014-08-06 | 钱占虎 | Process for recycling sludge generated in treatment of iron-containing acidic wastewater |
| CN104671290A (en) * | 2015-03-20 | 2015-06-03 | 王浩 | Method for preparing iron oxide red by pickling sludge |
| CN105540937A (en) * | 2016-02-04 | 2016-05-04 | 卢玉柱 | Treatment method of steel processing waste dangerous chemicals and product calcium-base ferrous hydroxide thereof |
| CN105906174A (en) * | 2016-05-04 | 2016-08-31 | 卢玉柱 | Method for ferric hydroxide water purifier preparation with sludge after steel pickling waste water lime neutralization |
| CN106379976A (en) * | 2016-08-30 | 2017-02-08 | 无锡市新都环保科技有限公司 | Equipment and method for preparing water treatment agent through using acidic iron-containing wastewater |
| CN107200447A (en) * | 2017-06-20 | 2017-09-26 | 天津丰源首创环保科技有限公司 | A kind of pickling iron and steel sludge quickly improves the resource utilization method after iron-holder |
| CN109399887A (en) * | 2018-12-07 | 2019-03-01 | 中国矿业大学(北京) | A kind of steel rolling pickling waste water sludge recycling processing method |
| CN112573580A (en) * | 2020-10-12 | 2021-03-30 | 江苏荣信环保科技有限公司 | Recovery treatment process of ferric trichloride sludge on surface of metal product |
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| CN103408158B (en) * | 2013-07-05 | 2015-01-14 | 无锡市新都环保科技有限公司 | Acidic iron-containing wastewater recycling system and method for carrying out in situ modification by system |
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| CN103553258A (en) * | 2013-11-13 | 2014-02-05 | 卢玉柱 | Safe recycling treatment method of waste iron/steel pickling acid |
| CN103553146A (en) * | 2013-11-13 | 2014-02-05 | 卢玉柱 | Method for preparing magnetite powder by using wasted electric lime size |
| CN103553258B (en) * | 2013-11-13 | 2014-08-06 | 卢玉柱 | Safe recycling treatment method of waste iron/steel pickling acid |
| CN103964660A (en) * | 2014-05-20 | 2014-08-06 | 钱占虎 | Process for recycling sludge generated in treatment of iron-containing acidic wastewater |
| CN103964660B (en) * | 2014-05-20 | 2016-01-06 | 钱占虎 | The acid wastewater treatment of acid-base neutralisation precipitator method process iron content produces the recovery process of mud |
| CN104671290A (en) * | 2015-03-20 | 2015-06-03 | 王浩 | Method for preparing iron oxide red by pickling sludge |
| CN105540937A (en) * | 2016-02-04 | 2016-05-04 | 卢玉柱 | Treatment method of steel processing waste dangerous chemicals and product calcium-base ferrous hydroxide thereof |
| CN105906174A (en) * | 2016-05-04 | 2016-08-31 | 卢玉柱 | Method for ferric hydroxide water purifier preparation with sludge after steel pickling waste water lime neutralization |
| CN106379976A (en) * | 2016-08-30 | 2017-02-08 | 无锡市新都环保科技有限公司 | Equipment and method for preparing water treatment agent through using acidic iron-containing wastewater |
| CN107200447A (en) * | 2017-06-20 | 2017-09-26 | 天津丰源首创环保科技有限公司 | A kind of pickling iron and steel sludge quickly improves the resource utilization method after iron-holder |
| GB2578645B (en) * | 2018-11-02 | 2021-11-24 | Darlow Lloyd & Sons Ltd | Method and apparatus for treating waste material |
| CN109399887A (en) * | 2018-12-07 | 2019-03-01 | 中国矿业大学(北京) | A kind of steel rolling pickling waste water sludge recycling processing method |
| CN112573580A (en) * | 2020-10-12 | 2021-03-30 | 江苏荣信环保科技有限公司 | Recovery treatment process of ferric trichloride sludge on surface of metal product |
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| CN102653437B (en) | 2013-07-17 |
| CN102358648A (en) | 2012-02-22 |
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