CN103864277A - Method utilizing garden garbage to carry out dehydrating pretreatment on sludge to achieve better burning effect - Google Patents

Method utilizing garden garbage to carry out dehydrating pretreatment on sludge to achieve better burning effect Download PDF

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Publication number
CN103864277A
CN103864277A CN201210537540.4A CN201210537540A CN103864277A CN 103864277 A CN103864277 A CN 103864277A CN 201210537540 A CN201210537540 A CN 201210537540A CN 103864277 A CN103864277 A CN 103864277A
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China
Prior art keywords
sludge
garden garbage
mud
pretreatment
drying
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Pending
Application number
CN201210537540.4A
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Chinese (zh)
Inventor
曹丽华
张洪喜
张德强
张忠园
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TIANJIN TANGGU XINYU ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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TIANJIN TANGGU XINYU ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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Priority to CN201210537540.4A priority Critical patent/CN103864277A/en
Publication of CN103864277A publication Critical patent/CN103864277A/en
Pending legal-status Critical Current

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Abstract

The invention belongs to the technical field of solid waste processing, and discloses a method utilizing garden garbage to carry out a semi-dehydrating pretreatment on dehydrated sludge from sewage processing factories. The method comprises the following steps: mixing garden garbage with dehydrated sludge according to a ratio of 0.04 to 0.15, and loading the mixture into a sludge drying and granulating machine to carry out a drying and granulating process, wherein the sludge drying and granulating machine is a rotating disc type sludge drying and granulating machine. After the pretreatment, the water content in sludge is reduced, moreover the content of the inflammable substances is increased, and the calorific value of the sludge is increased too, so that the sludge can keep on burning on itself in the post burning system, the addition amount of auxiliary fuel to the burning furnace is reduced, the energy consumption is saved, and social benefit and economic benefit are both achieved.

Description

One utilizes garden garbage to anhydration and incineration sludge pre-treatment method
Technical field
The invention belongs to disposition of solid waste technical field, relate to one and utilize garden garbage to the semi-oriented pretreatment process of sewage work's dewatered sludge.
Background technology
Through fast development in recent years, market of sewage treatment changes to operation from Facilities Construction, and perfect along with operation market follows the sludge treatment problem of product day by day to highlight as sewage disposal.According to " Chinese sludge treatment is disposed Market Report (2011 editions) " statistic data, by the end of the end of the year in 2010, whole nation town sewage treatment capacity reaches 343 billion cubic meters, and dewatered sludge generation approaches 2,200 ten thousand tons, and wherein has 80% not dealt carefully with.
The sewage sludge harmlessness that " " 12 " national town sewage is processed and the planning of regeneration Facilities Construction " that the General Office of the State Council in 2012 issues proposes municipality directly under the Central Government, provincial capital and municipalities and cities with independent plans is processed disposal rate and is reached 80%.
A key character of mud is exactly that water ratio is high, and fresh sludge water ratio is generally 96%~99.8%, and the moisture percentage in sewage sludge after mechanical dehydration is generally in 80%~85% left and right.Meanwhile, mud contains again large amount of organic, and in its solid body, organic content is up to 60%~65%, and solid body heat value is up to 2000kcal/kg~3000kcal/kg, and these features provide the foundation as fuel burning fuel for mud again.
It is the treatment process of mud specialization the most thoroughly taking burning as the sludge disposal technology of core.It can make the whole carbonizations of organism in mud, burn pathogenic agent to death, can realize inerting processing completely to the mud that contains heavy metal or chemical pollutant, can reduce to greatest extent pollution.
Mud is before burning, and mummification pre-treatment is a very important step, and sludge drying is generally divided into absolutely dryization and semi-oriented.Wherein absolutely dryization is that about water ratio 80% dewatered sludge is dried to water ratio 10% left and right, and semi-oriented be that about water ratio 80% dewatered sludge is dried to water ratio 55% left and right.General mud fluidized bed incinerator can self-sustaining burning water ratio in 55% left and right, if adopt after full drying and other treatment, except wasting energy, the mud of water ratio 10% also will be taked security measures, increased working cost, therefore application is semi-oriented processing more widely.
Research shows, the high-moisture percentage of mud self-sustaining burning must be less than 70%, when mud Lower heat value is during lower than 3350KJ/Kg, cannot lean on self burning, must add auxiliary fuel.Therefore, sludge drying pre-treatment main purpose is to reduce water ratio in mud, improves sludge calorific value, makes its energy self-sustaining burning in incinerator, reduces the consumption of auxiliary fuel in incinerator, and save energy, reduces energy consumption.
Sludge drying technique comprises heat drying, bioleaching mummification and alkaline matter mummification at present.
Heat drying technology refers to that dewatered sludge, under external heat source heating condition, makes the process that in mud, moisture evaporates gradually.According to the heat transfer type between mud and thermal source, heat drying is divided into convection type (Direct Contact Heating), conduction-type (by interchanger indirect heating) or both combining method.
Bioleaching mummification utilizes multiple-microorganism mushroom under aerobic condition, to act on concentrated liquid mud (water ratio 95%~98%), mud is carried out to modification, in and the surface charge of mud micelle, reduce Extracellular Polymers, discharge the irreducible water in mud, improve the flucculation structure of mud, thereby sludge settling property and dewatering are improved, and then through mechanical dehydration facility, be finally that moisture percentage in sewage sludge is down to 60% left and right.
Alkaline matter drying technique is to point to mud to add in proportion certain alkaline matter (lime, flyash or flying dust), by moisture generation chemical reaction liberated heat in alkaline matter and mud, make moisture evaporation in mud, mud solid content increases simultaneously, is conducive to later stage landfill, compost or incineration disposal.
Summary of the invention
The object of this invention is to provide a kind of pretreatment process of garden garbage to anhydration and incineration mud that utilize.By add the garden garbage after pulverizing in mud, under external heat source condition, make moisture evaporation in mud, improve mud solid content.Meanwhile, owing to having added garden garbage, be that in mud, combustible content increases, sludge calorific value increases, thereby ensures mud self-sustaining burning in incinerator.
The object of the invention is to be achieved through the following technical solutions.
1, one utilizes garden garbage to anhydration and incineration sludge pre-treatment method, it is characterized in that, its method steps is as follows: according to garden garbage: the ratio of dewatered sludge=0.05~0.15 packs garden garbage and dewatered sludge into sludge drier mummification, drying time is 20min~30min, obtains mud after treatment.
2, one according to claim 1 utilizes garden garbage to anhydration and incineration sludge pre-treatment method, it is characterized in that, described garden garbage comprises that ornamental plant withers and falls naturally or manually prunes the plant residue producing, mainly comprises leaf, careless bits, trees and shrub beta pruning etc.Described garden garbage must first be crushed to particle diameter 1cm~2cm before mixing with dewatered sludge.
3, one according to claim 1 utilizes garden garbage to anhydration and incineration sludge pre-treatment method, it is characterized in that, described sludge drier is rotating disc type sludge drier.
Beneficial effect
Beneficial effect of the present invention is:
1, the present invention provides a kind of new technology, novel method for sludge incineration technique mummification pre-treatment;
2, the garden garbage of the present invention after pulverizing by interpolation, improves the sensitivity characteristic that initial charge moisture percentage in sewage sludge changes, and avoids to a certain extent mud in moisture eliminator, to occur " gluing phase " stage (water ratio is 60% left and right);
3, utilize the pretreated mud solid content of the technology of the present invention to improve, calorific value improves, and self-sustaining burning in incinerator, has reduced incinerator auxiliary fuel consumption, save energy;
4, the present invention provides a recycling outlet for afforestation refuse treatment.
Brief description of the drawings
Fig. 1 is for utilizing garden garbage to sludge incineration mummification pretreatment process figure.
Embodiment
The object of this invention is to provide a kind of pretreatment process of garden garbage to anhydration and incineration mud that utilize, Fig. 1 is for utilizing garden garbage to sludge incineration mummification pretreatment process figure, and below in conjunction with embodiment and accompanying drawing, the present invention will be further described:
Embodiment 1
One utilizes garden garbage to anhydration and incineration sludge pre-treatment method, the method step is as follows: the dewatered sludge water ratio of selecting is 81.32%, it is 1cm~2cm that the garden garbage of selecting is crushed to particle diameter, according to weight garden garbage: dewatered sludge=0.05: 1 ratio packs dewatered sludge and garden garbage mixture into rotating disc type sludge drier, be 20min time of drying, obtains mud after treatment.
Embodiment 2
One utilizes garden garbage to anhydration and incineration sludge pre-treatment method, the method step is as follows: the dewatered sludge water ratio of selecting is 83.24%, it is 1cm~2cm that the garden garbage of selecting is crushed to particle diameter, according to weight garden garbage: dewatered sludge=0.1: 1 ratio packs dewatered sludge and garden garbage mixture into rotating disc type sludge drier, be 25min time of drying, obtains mud after treatment.
Embodiment 3
One utilizes garden garbage to anhydration and incineration sludge pre-treatment method, the method step is as follows: the dewatered sludge water ratio of selecting is 82.94%, it is 1cm~2cm that the garden garbage of selecting is crushed to particle diameter, according to weight garden garbage: dewatered sludge=0.15: 1 ratio packs dewatered sludge and garden garbage mixture into rotating disc type sludge drier, be 30min time of drying, obtains mud after treatment.
Below by reference to the accompanying drawings the specific embodiment of the present invention is described; but these explanations can not be understood to limit scope of the present invention; protection scope of the present invention is limited by the claims of enclosing, and any change on the claims in the present invention basis is all protection scope of the present invention.

Claims (3)

1. one kind is utilized garden garbage to anhydration and incineration sludge pre-treatment method, it is characterized in that, its method steps is as follows: according to garden garbage: the ratio of dewatered sludge=0.05~0.15 packs garden garbage and dewatered sludge into sludge drier mummification, drying time is 20min~30min, obtains mud after treatment.
2. one according to claim 1 utilizes garden garbage to anhydration and incineration sludge pre-treatment method, it is characterized in that, described garden garbage comprises that ornamental plant withers and falls naturally or manually prunes the plant residue producing, mainly comprises leaf, careless bits, trees and shrub beta pruning etc.Described garden garbage must first be crushed to particle diameter 1cm~2cm before mixing with dewatered sludge.
3. one according to claim 1 utilizes garden garbage to anhydration and incineration sludge pre-treatment method, it is characterized in that, described sludge drier is rotating disc type sludge drier.
CN201210537540.4A 2012-12-12 2012-12-12 Method utilizing garden garbage to carry out dehydrating pretreatment on sludge to achieve better burning effect Pending CN103864277A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210537540.4A CN103864277A (en) 2012-12-12 2012-12-12 Method utilizing garden garbage to carry out dehydrating pretreatment on sludge to achieve better burning effect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210537540.4A CN103864277A (en) 2012-12-12 2012-12-12 Method utilizing garden garbage to carry out dehydrating pretreatment on sludge to achieve better burning effect

Publications (1)

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CN103864277A true CN103864277A (en) 2014-06-18

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106224978A (en) * 2016-07-08 2016-12-14 重庆文渠环保科技有限公司 Utilize the method and device of chamber type sintering all kinds of mud of technology harmlessness disposing
CN106765159A (en) * 2016-12-26 2017-05-31 重庆文渠环保科技有限公司 A kind of industrial organic solid castoff burns the innoxious method for coexisting and putting with sludge high temperature
CN105819644B (en) * 2016-05-25 2019-05-03 北京航纳科技有限公司 A kind of oily sludge innocuity disposal system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105819644B (en) * 2016-05-25 2019-05-03 北京航纳科技有限公司 A kind of oily sludge innocuity disposal system and method
CN106224978A (en) * 2016-07-08 2016-12-14 重庆文渠环保科技有限公司 Utilize the method and device of chamber type sintering all kinds of mud of technology harmlessness disposing
CN106765159A (en) * 2016-12-26 2017-05-31 重庆文渠环保科技有限公司 A kind of industrial organic solid castoff burns the innoxious method for coexisting and putting with sludge high temperature

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Application publication date: 20140618