CN104973749A - Sludge solidification method - Google Patents

Sludge solidification method Download PDF

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Publication number
CN104973749A
CN104973749A CN201510403865.7A CN201510403865A CN104973749A CN 104973749 A CN104973749 A CN 104973749A CN 201510403865 A CN201510403865 A CN 201510403865A CN 104973749 A CN104973749 A CN 104973749A
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Prior art keywords
sludge
mud
inorganic mineral
sludge curing
solidifying agent
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CN201510403865.7A
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CN104973749B (en
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吉国青
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Yancheng Source Of Dan Low-Carbon Technology Research Institute Co Ltd
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Yancheng Source Of Dan Low-Carbon Technology Research Institute Co Ltd
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Abstract

The present invention discloses a sludge solidification method, which comprises: pouring raw sludge into a mixing stirrer, pouring a curing agent having the amount of 3-6% of the weight of the raw sludge, starting the stirrer, carrying out room temperature stirring for 5-10 min so as to uniformly stir the sludge, loading the uniformly-stirred sludge into a dryer, and drying for at least half an hour or carrying out air-placing for at least three days to obtain the sludge with the water content of not more than 25%. With the sludge solidification method of the present invention, the water content of the treated sludge is low.

Description

Sludge curing method
Technical field
The present invention relates to technical field of sludge treatment, especially relate to a kind of sludge curing method.
Background technology
A large amount of mud can be produced in sewage treatment process.Aforementioned mud is the material of the very much higher medium of a kind of water content, wherein except containing except a large amount of moisture, also containing pathogenic agent, microorganism, organism and the material such as heavy metal, salt.Moisture percentage in sewage sludge after press filtration process is not 70% to 80% etc.Higher water ratio can bring very large trouble to later stage sludge treatment, and mishandling meeting causes serious secondary pollution.Meanwhile, the purposes of current mud mainly landfill, burn, make Agricultural Fertilizer.And, deposit the phenomenon that a large amount of mud is arbitrarily piled up at present.Therefore the safety of mud and the cheap problem disposed also become increasingly conspicuous.Harmful waste is become harmless material, that is turns waste into wealth and be only the only way of sludge treatment.
Summary of the invention
The object of this invention is to provide a kind of sludge curing method, it has the lower feature of the moisture percentage in sewage sludge after process.
The technical solution adopted in the present invention is: sludge curing method, comprises the following steps:
1) primary mud is added to mixing and blending machine, adds the solidifying agent of primary mud weight 3 ~ 6%;
2) start stirrer, stirring at normal temperature makes sludge agitation even for 5 ~ 10 minutes, afterwards, the mud stirred is loaded drying machine and dries at least half hour or hang at least 3 days, obtain the mud that water ratio is not more than 25%.
With mass ratio range, described solidifying agent includes: the inorganic mineral 50% ~ 60% of magnesium, the inorganic mineral 12% ~ 15% of calcium, clay mineral 5% ~ 10%, activated alumina 5% ~ 10%.
The inorganic mineral of described magnesium is magnesium oxide.
The inorganic mineral of described calcium is calcium carbonate.
The particle diameter of described solidifying agent is less than 120um.
Described stirrer is turbine centrifugal stirrer.
Described drying machine is blast drier.
The present invention is advantageously: the moisture percentage in sewage sludge after process is lower.Sludge curing method of the present invention is by mixing solidifying agent with primary mud, the crystal that solidification is produced is embedded into the effect playing skeleton in primary mud, make primary mud more stable, and the heavy metal in primary mud generates more stable precipitation, those precipitations stick to the surface of nucleus by ion surface absorption.After tested, the moisture percentage in sewage sludge after process of the present invention is not more than 25%.
Embodiment
Embodiment, sludge curing method, comprises the following steps:
1) primary mud water ratio being greater than 80% is added to mixing and blending machine, adds solidifying agent, and the dosage of this solidifying agent is 3 ~ 6% of primary mud weight.Such as, the dosage of solidifying agent is 3%, 5% or 6% of primary mud weight.
2) start stirrer, stirring at normal temperature makes sludge agitation even in 5 ~ 10 minutes.Such as, stir 5 minutes, 8 minutes, 10 minutes.Afterwards, the mud stirred is loaded drying machine to dry at least 30 minutes.Such as: dry 30 minutes, 60 minutes or 120 minutes.Also 3 days can be hung.Such as: hang 3 days, 6 days, 12 days.Obtain the mud that water ratio is not more than 25%.
Wherein, with mass ratio range, this solidifying agent includes inorganic mineral 50% ~ 60%, the inorganic mineral 12% ~ 15% of calcium, clay mineral 5% ~ 10%, the activated alumina 5% ~ 10% of magnesium.Such as: in solidifying agent, include the inorganic mineral 50% of magnesium, the inorganic mineral 12% of calcium, clay mineral 5%, activated alumina 5%; Or, in solidifying agent, include the inorganic mineral 55% of magnesium, the inorganic mineral 13% of calcium, clay mineral 8%, activated alumina 8%; Or solidifying agent includes inorganic mineral 60%, the inorganic mineral 15% of calcium, clay mineral 10%, the activated alumina 10% of magnesium.Preferably, the inorganic mineral of this magnesium is magnesium oxide, and the inorganic mineral of this calcium is calcium carbonate.
In order to reach better solidification effect, the particle diameter of the solidifying agent adopted is less than 120um.Such as particle diameter is: 100um, 80um, 110um.
Aforementioned stirrer preferably adopts turbine centrifugal stirrer, and drying machine adopts blast drier.
Through the actual test of several times, the sludge moisture content through preceding method process is: 20%, the numerical value such as 22%, 15%, 18%, all more than 25%.
Principle of the present invention: the solidifying agent added mixes with primary mud, a series of physical-chemical reaction can be there is in this process, interionic generates the carbonate of magnesium and stirs together, the crystal that solidification produces is embedded into the effect playing skeleton in primary mud, make primary mud more stable, the small nucleus of magnesiumcarbonate that silica sand ion surface generates, grow into needle-like, discharge hydroxide radical ion simultaneously, more stable precipitation can be generated with the heavy metal in primary mud, be sticked to the surface of nucleus by ion surface absorption.And calcium carbonate can destroy the structure of cell in primary mud, cellular water is discharged, volatilizees rapidly, reach the object of dehydration.Mud after solidification has stable structure, has general mud soil characteristics, has non-reversibility.And the method adopts normal temperature or cryodrying, effectively can prevent the toxic and harmfuls such as stench, dioxin.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (7)

1. sludge curing method, comprises the following steps:
1) primary mud is added to mixing and blending machine, adds the solidifying agent of primary mud weight 3 ~ 6%;
2) start stirrer, stirring at normal temperature makes sludge agitation even for 5 ~ 10 minutes, afterwards, the mud stirred is loaded drying machine and dries at least half hour or hang at least 3 days, obtain the mud that water ratio is not more than 25%.
2. sludge curing method according to claim 1, is characterized in that: with mass ratio range, and described solidifying agent includes: the inorganic mineral 50% ~ 60% of magnesium, the inorganic mineral 12% ~ 15% of calcium, clay mineral 5% ~ 10%, activated alumina 5% ~ 10%.
3. sludge curing method according to claim 2, is characterized in that: the inorganic mineral of described magnesium is magnesium oxide.
4. sludge curing method according to claim 2, is characterized in that: the inorganic mineral of described calcium is calcium carbonate.
5. sludge curing method according to claim 2, is characterized in that: the particle diameter of described solidifying agent is less than 120um.
6. sludge curing method according to claim 1, is characterized in that: described stirrer is turbine centrifugal stirrer.
7. sludge curing method according to claim 1, is characterized in that: described drying machine is blast drier.
CN201510403865.7A 2015-07-10 2015-07-10 Sludge solidification method Active CN104973749B (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105217926A (en) * 2015-10-20 2016-01-06 盐城琛丹低碳技术研究院有限公司 Sludge reduction method
CN105254166A (en) * 2015-11-14 2016-01-20 辽宁工程技术大学 Dewatered sludge curing agent and preparing method and using method thereof
CN105481224A (en) * 2016-01-21 2016-04-13 盐城琛丹低碳技术研究院有限公司 Air source sludge drying method
CN106007324A (en) * 2016-07-06 2016-10-12 无锡市华东电力设备有限公司 Solidification and desiccation process of sludge
CN106045562A (en) * 2016-06-03 2016-10-26 盐城琛丹低碳技术研究院有限公司 Preparing method of ultra-light material
CN106316072A (en) * 2016-10-14 2017-01-11 盐城琛丹低碳技术研究院有限公司 Preparation method of high-efficiency sludge dewatering agent
CN107235669A (en) * 2017-06-15 2017-10-10 盐城琛丹低碳技术研究院有限公司 Jackstone material preparation method
CN107976379A (en) * 2017-11-22 2018-05-01 河海大学 It is a kind of to measure the new method for mixing curing sludge curing materials volume
CN110339527A (en) * 2019-07-23 2019-10-18 哈德逊(苏州)水技术有限公司 A kind of incineration of refuse flyash curing agent

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105217926A (en) * 2015-10-20 2016-01-06 盐城琛丹低碳技术研究院有限公司 Sludge reduction method
CN105254166A (en) * 2015-11-14 2016-01-20 辽宁工程技术大学 Dewatered sludge curing agent and preparing method and using method thereof
CN105254166B (en) * 2015-11-14 2017-10-20 辽宁工程技术大学 A kind of dewatered sludge curing agent, preparation method and application method
CN105481224A (en) * 2016-01-21 2016-04-13 盐城琛丹低碳技术研究院有限公司 Air source sludge drying method
CN106045562A (en) * 2016-06-03 2016-10-26 盐城琛丹低碳技术研究院有限公司 Preparing method of ultra-light material
CN106007324A (en) * 2016-07-06 2016-10-12 无锡市华东电力设备有限公司 Solidification and desiccation process of sludge
CN106316072A (en) * 2016-10-14 2017-01-11 盐城琛丹低碳技术研究院有限公司 Preparation method of high-efficiency sludge dewatering agent
CN106316072B (en) * 2016-10-14 2019-01-25 盐城琛丹低碳技术研究院有限公司 The preparation method of High Efficiency Agent of Sludge Dehydration
CN107235669A (en) * 2017-06-15 2017-10-10 盐城琛丹低碳技术研究院有限公司 Jackstone material preparation method
CN107235669B (en) * 2017-06-15 2020-01-03 盐城琛丹低碳技术研究院有限公司 Preparation method of riprap material
CN107976379A (en) * 2017-11-22 2018-05-01 河海大学 It is a kind of to measure the new method for mixing curing sludge curing materials volume
CN107976379B (en) * 2017-11-22 2020-04-21 河海大学 Method for measuring mixing amount of freshly-mixed solidified sludge solidifying material
CN110339527A (en) * 2019-07-23 2019-10-18 哈德逊(苏州)水技术有限公司 A kind of incineration of refuse flyash curing agent

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