CN103359907A - Novel environment friendly conditioner for deep dehydration of sludge - Google Patents

Novel environment friendly conditioner for deep dehydration of sludge Download PDF

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Publication number
CN103359907A
CN103359907A CN2013102788522A CN201310278852A CN103359907A CN 103359907 A CN103359907 A CN 103359907A CN 2013102788522 A CN2013102788522 A CN 2013102788522A CN 201310278852 A CN201310278852 A CN 201310278852A CN 103359907 A CN103359907 A CN 103359907A
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China
Prior art keywords
sludge
amendment
environment friendly
novel environment
mud
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CN2013102788522A
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Chinese (zh)
Inventor
张爱均
刘军
张建国
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NANJING WANDERS ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY Co Ltd
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NANJING WANDERS ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY Co Ltd
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Priority to CN2013102788522A priority Critical patent/CN103359907A/en
Publication of CN103359907A publication Critical patent/CN103359907A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a novel environment friendly conditioner for deep dehydration of sludge. The novel environment friendly conditioner comprises the following components in percentage by weight: 5-15% of alumina, 1-5% of polyacrylamide, 50-80% of quick lime, 1-3% of zinc oxide and 10-30% of coal ash. All the components in the conditioner disclosed by the invention are rich in source, low in price, economic and environment friendly; the conditioner almost contains no Cl<-> and SO4<2-> and is little in corrosion to equipment such as subsequent combustion furnaces and the like and capable of reducing the workload of desalination and desulfuration treatment; the effect for conditioning the sludge is remarkable, and the water content of the dewatered conditioned sludge is below 60%; the conditioner is small in additive amount, little in influence to the pH value of the sludge, incapable of changing the original property of the sludge and capable of treating the sludge according to the self property of the sludge after the sludge is dewatered; activated heavy metals in the sludge are solidified, so that the disposal risk of the sludge is reduced.

Description

A kind of novel environment friendly amendment for deeply dehydrating sludge
Technical field
The present invention relates to a kind of chemical amendment of mud, is a kind of chemical amendment of municipal wastewater deeply dehydrating sludge specifically.
Background technology
Along with a large amount of construction of municipal sewage plant, sewage load and sludge yield all constantly increase.Contain a large amount of microorganisms, pathogenic agent, heavy metal and organic pollutant in the mud, if mishandling, can cause serious secondary pollution.Municipal sewage sludge water ratio too high (about 98%), and generation is large, therefore must carry out processed to mud.The main sludge dewatering technology of using at present, moisture content of the cake is up to about 80%, and not only reduction is restricted, nor can reach the effective requirement that is connected with the subsequent disposal disposal process.
The deeply dehydrating sludge technology is the new way that is fit to China's ﹠ Mud, can not only bring convenience for follow-up disposal, and can take into account the economy and environment balance of sludge disposal process.The deep dehydration of mud refers to by the higher mud of water ratio being carried out after chemistry adjust to process, and high-pressure compressing dewaters to water ratio below 60% again, and mud is quantitatively greatly reduced, and the more important thing is that to make mud subsequent disposal approach more extensive.Mud after the advanced treatment has certain calorific value, can be used as the fuel of the low taste of power plant and the grog in the cement production process, realizes stable, harmless treatment and the utilization of resources.Also can significantly reduce land seizure and environmental pollution even carry out landfill.
The modifier treatment of mud is key link and the core technology of deeply dehydrating sludge.Modifier treatment is exactly the colloidal state structure of destroying mud, reduces the avidity between muddy water, improves the dewatering of mud.Adopt traditional sludge conditioning medicament, dehydrating effect is better, but introduces Cl easily -, SO 4 2-, Fe 3+Thereby, can increase the difficulty that rear subsequent filtrate or mud cake desalination, desulfurization and decolouring are processed, and to the corrosion of the equipment such as incinerator.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of novel environment friendly amendment and application thereof of being used for deeply dehydrating sludge that can improve dehydrating effect.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows: a kind of novel environment friendly amendment for deeply dehydrating sludge comprises the component of following weight percent:
Bauxitic clay 5~15%
Polyacrylamide 1~5%
Unslaked lime 50~80%
Zinc oxide 1~3%
Flyash 10~30%.
Described flyash adopts second class powered coal ash, density 3.15kg/m 3, fineness (the 0.045mm square hole sieve tails over)≤20%, water demand ratio≤105%, loss on ignition≤8%, water content≤1%, sulfur trioxide content≤3%.Adopting the benefit of second class powered coal ash is relative low price, changing waste into resources utilization, and the source is abundant.
Described polyacrylamide adopts cationic-type polyacrylamide, molecular weight 400~6,000,000, cationic degree 30~50%.Benefit is that conditioning effect is good, treatment cycle short, selection is convenient.
Bauxitic clay: aluminium sesquioxide content is greater than 80%, and ferric oxide content is greyish white Powdered less than 3%.Benefit: with low cost, selection convenience.
The present invention also provides the application of above-mentioned novel environment friendly amendment for deeply dehydrating sludge in sludge treatment.
Dehydration mechanism of the present invention: the calcium hydroxide of giving birth to behind bauxitic clay, zinc oxide and flyash and the lime hydration reacts rapidly, polymerization generates hydroxy polymer colloid or precipitation of hydroxide, thereby make a large amount of free water change water of constitution into, the gel so that add the rapid multiviscosisty of mud of amendment.Calcium oxide is as coagulant aids, and except regulating the pH value, the calcium ion after its dissolving can be formed porous web trellis hole frame by the absorption of the soil ulmin in the mud in mud, thereby improves the compressibility of mud, increases floc strength.Calcium oxide and bauxitic clay also have the effect of passive metal, sterilization, can make the heavy metal of ionic condition generate precipitation of hydroxide in alkaline environment, reduce the activity of heavy metal ion; Can be by pH value and the hydrolysis heat release that improves mud, destroy the cell tissue of cell walls take protein as the master and enzyme, acid RNA, carbohydrate and grease etc., play the effect of sterilization.In addition, flyash also can play the effect of regulating the pH value.
The improvement of using as amendment of the present invention, at first that described novel environment friendly amendment is deployed and mix according to the proportioning of each component, dewatering after stirring in the amendment adding mud that then will be deployed gets final product.
As the further improvement that amendment of the present invention is used, the addition of described novel environment friendly amendment is 5~10% of mud dry weight.
Beneficial effect: the present invention compared with prior art has following advantage: each the component source in the amendment is abundant, cheap, economic environmental protection; Substantially do not contain Cl in the amendment -, SO 4 2-, little to the corrosion of the equipment such as follow-up incinerator, can reduce the workload that desalination, desulfurization are processed; Conditioning effect to mud is obvious, and the water ratio of mud is below 60% after the conditioning sludge dewatering; The amendment addition is few, and is little on the impact of sludge pH value, the former character of mud do not changed, and can dispose processing according to the mud self property after the dehydration; Part activated state heavy metal is cured in the mud, but the disposal risk of reduce mud.
Embodiment
According to following embodiment, the present invention may be better understood.Yet, those skilled in the art will readily understand that the described concrete content of embodiment only is used for explanation the present invention, and should also can not limit the present invention described in detail in claims.
Component described in the present invention is the commercially available prod, and requiring of each component is as follows:
Bauxitic clay: aluminium sesquioxide content is greater than 80%, and ferric oxide content is greyish white Powdered less than 3%.
Polyacrylamide: adopt cationic-type polyacrylamide, molecular weight 400~6,000,000, cationic degree 30~50%
Unslaked lime: adopt technical grade unslaked lime, content 90%.
Zinc oxide: adopt technical grade zinc oxide, content 97%.
Flyash: adopt second class powered coal ash, density 3.15kg/m 3, fineness (the 0.045mm square hole sieve tails over)≤20%, water demand ratio≤105%, loss on ignition≤8%, water content≤1%, sulfur trioxide content≤3%.
Embodiment 1: a kind of novel environment friendly amendment for deeply dehydrating sludge comprises the component of following weight percent:
Bauxitic clay 8%
Polyacrylamide 3%
Unslaked lime 62%
Zinc oxide 2%
Flyash 25%;
At first above-mentioned amendment is allocated and mixed according to the ratio of each component, then process water-containing sludge, when dewatered sludge weight is 10kg in the water-containing sludge, the water ratio of mud is 95% before processing, the pH value is 6.9, add deployed amendment, the addition of amendment is 8% of mud dry weight; Stirred 10 minutes.Then the mud after will stirring is put into the filter press device, and the dehydrated sludge water ratio can reach 56%; Sludge pH value after the processing is 7.1.
Embodiment 2: a kind of novel environment friendly amendment for deeply dehydrating sludge comprises the component of following weight percent:
Bauxitic clay 5%
Polyacrylamide 4%
Unslaked lime 60%
Zinc oxide 1%
Flyash 30%;
At first above-mentioned amendment is allocated and mixed according to the ratio of each component, then process water-containing sludge, when dewatered sludge weight is 10kg in the water-containing sludge, the water ratio of mud is 95% before processing, pH is 6.9, add deployed amendment, the addition of amendment is 5% of mud dry weight; Stirred 10 minutes.Then the mud after will stirring is put into the filter press device, and the dehydrated sludge water ratio can reach 57%; Sludge pH value after the processing is 7.2.
Embodiment 3: a kind of novel environment friendly amendment for deeply dehydrating sludge comprises the component of following weight percent:
Bauxitic clay 15%
Polyacrylamide 1%
Unslaked lime 71%
Zinc oxide 3%
Flyash 10%;
At first above-mentioned amendment is allocated and mixed according to the ratio of each component, then process water-containing sludge, when dewatered sludge weight is 10kg in the water-containing sludge, the water ratio of mud is 95% before processing, pH is 6.9, add deployed amendment, the addition of amendment is 6% of mud dry weight; Stirred 10 minutes.Then the mud after will stirring is put into the filter press device, and the dehydrated sludge water ratio can reach 59%; Sludge pH value after the processing is 7.1.
Embodiment 4: a kind of novel environment friendly amendment for deeply dehydrating sludge comprises the component of following weight percent:
Bauxitic clay 13%
Polyacrylamide 5%
Unslaked lime 65%
Zinc oxide 2%
Flyash 15%;
At first above-mentioned amendment is allocated and mixed according to the ratio of each component, then process water-containing sludge, when dewatered sludge weight is 10kg in the water-containing sludge, the water ratio of mud is 95% before processing, pH is 6.8, add deployed amendment, the addition of amendment is 10% of mud dry weight; Stirred 10 minutes.Then the mud after will stirring is put into the filter press device, and the dehydrated sludge water ratio can reach 55%; Sludge pH value after the processing is 7.0.
Embodiment 5: a kind of novel environment friendly amendment for deeply dehydrating sludge comprises the component of following weight percent:
Bauxitic clay 10%
Polyacrylamide 2%
Unslaked lime 75%
Zinc oxide 3%
Flyash 10%;
At first above-mentioned amendment is allocated and mixed according to the ratio of each component, then process water-containing sludge, when dewatered sludge weight is 10kg in the water-containing sludge, the water ratio of mud is 95% before processing, pH is 6.8, add deployed amendment, the addition of amendment is 7% of mud dry weight; Stirred 10 minutes.Then the mud after will stirring is put into the filter press device, and the dehydrated sludge water ratio can reach 58%; Sludge pH value after the processing is 7.1.
Embodiment 6: substantially the same manner as Example 1, difference is the prescription of novel environment friendly amendment, and is specific as follows:
Bauxitic clay 15%
Polyacrylamide 4%
Unslaked lime 50%
Zinc oxide 3%
Flyash 28%.
Embodiment 7: substantially the same manner as Example 1, difference is the prescription of novel environment friendly amendment, and is specific as follows:
Bauxitic clay 7%
Polyacrylamide 2%
Unslaked lime 80%
Zinc oxide 1%
Flyash 10%.

Claims (6)

1. a novel environment friendly amendment that is used for deeply dehydrating sludge is characterized in that, comprises the component of following weight percent:
Bauxitic clay 5~15%
Polyacrylamide 1~5%
Unslaked lime 50~80%
Zinc oxide 1~3%
Flyash 10~30%.
2. the novel environment friendly amendment for deeply dehydrating sludge according to claim 1 is characterized in that, described flyash adopts second class powered coal ash.
3. the novel environment friendly amendment for deeply dehydrating sludge according to claim 1 is characterized in that, described polyacrylamide adopts cationic-type polyacrylamide, molecular weight 400~6,000,000, cationic degree 30~50%.
4. the novel environment friendly amendment for deeply dehydrating sludge claimed in claim 1 is in the application of sludge treatment.
5. application according to claim 4 is characterized in that, and is at first that described novel environment friendly amendment is deployed and mix according to the proportioning of each component, and then deployed amendment being added dewaters after stirring in the mud gets final product.
6. application according to claim 4 is characterized in that, the addition of described novel environment friendly amendment is 5~10% of mud dry weight.
CN2013102788522A 2013-07-04 2013-07-04 Novel environment friendly conditioner for deep dehydration of sludge Pending CN103359907A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104261652A (en) * 2014-09-28 2015-01-07 佑景天(北京)国际水环境研究中心有限公司 Efficient sludge dewatering flocculant
CN104944737A (en) * 2015-06-23 2015-09-30 杜普利 Sludge dehydrating agent and dehydrating method thereof
CN106116106A (en) * 2016-08-22 2016-11-16 陈永桥 A kind of for sludge of sewage treatment plant conditioner
CN106278145A (en) * 2016-07-27 2017-01-04 亚太森博(山东)浆纸有限公司 The process technique of a kind of mud, shale brick and preparation method thereof
CN108238735A (en) * 2018-01-19 2018-07-03 辽宁鑫隆科技有限公司 A kind of cement burning desulfurization, sulphur-fixing agent
CN108862505A (en) * 2018-06-21 2018-11-23 宁波沸柴机器人科技有限公司 A kind of inorganic composite flocculant and its preparation method and application

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JPH09323099A (en) * 1996-06-04 1997-12-16 Chichibu Onoda Cement Corp Treatment of sludge
JPH10230298A (en) * 1997-02-20 1998-09-02 K I T:Kk Treatment of sludge
CN102276128A (en) * 2011-05-23 2011-12-14 同济大学 Treatment method of dehydrated sludge in domestic sewage treatment plant
CN102976585A (en) * 2012-10-13 2013-03-20 慈溪市锐玛电子有限公司 Sludge dewatering drying method
CN103030258A (en) * 2012-12-31 2013-04-10 南京城建环保水务投资有限公司 Deep dehydration device and dehydration method for sludge
CN103073264A (en) * 2013-02-07 2013-05-01 河南华天环保科技有限公司 Method for preparing ceramsite by utilizing high-moisture-content sludge
CN103130390A (en) * 2013-03-25 2013-06-05 陕西延长石油(集团)有限责任公司研究院 Oil-containing sludge treatment method and process flow

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09323099A (en) * 1996-06-04 1997-12-16 Chichibu Onoda Cement Corp Treatment of sludge
JPH10230298A (en) * 1997-02-20 1998-09-02 K I T:Kk Treatment of sludge
CN102276128A (en) * 2011-05-23 2011-12-14 同济大学 Treatment method of dehydrated sludge in domestic sewage treatment plant
CN102976585A (en) * 2012-10-13 2013-03-20 慈溪市锐玛电子有限公司 Sludge dewatering drying method
CN103030258A (en) * 2012-12-31 2013-04-10 南京城建环保水务投资有限公司 Deep dehydration device and dehydration method for sludge
CN103073264A (en) * 2013-02-07 2013-05-01 河南华天环保科技有限公司 Method for preparing ceramsite by utilizing high-moisture-content sludge
CN103130390A (en) * 2013-03-25 2013-06-05 陕西延长石油(集团)有限责任公司研究院 Oil-containing sludge treatment method and process flow

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104261652A (en) * 2014-09-28 2015-01-07 佑景天(北京)国际水环境研究中心有限公司 Efficient sludge dewatering flocculant
CN104261652B (en) * 2014-09-28 2016-04-13 佑景天(北京)国际水环境研究中心有限公司 High-effective sludge dehydration flocculation agent
CN104944737A (en) * 2015-06-23 2015-09-30 杜普利 Sludge dehydrating agent and dehydrating method thereof
CN106278145A (en) * 2016-07-27 2017-01-04 亚太森博(山东)浆纸有限公司 The process technique of a kind of mud, shale brick and preparation method thereof
CN106116106A (en) * 2016-08-22 2016-11-16 陈永桥 A kind of for sludge of sewage treatment plant conditioner
CN108238735A (en) * 2018-01-19 2018-07-03 辽宁鑫隆科技有限公司 A kind of cement burning desulfurization, sulphur-fixing agent
CN108862505A (en) * 2018-06-21 2018-11-23 宁波沸柴机器人科技有限公司 A kind of inorganic composite flocculant and its preparation method and application

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Application publication date: 20131023