CN101254997A - Sludge denuding dehydrolyzing method - Google Patents
Sludge denuding dehydrolyzing method Download PDFInfo
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- CN101254997A CN101254997A CNA200810060562XA CN200810060562A CN101254997A CN 101254997 A CN101254997 A CN 101254997A CN A200810060562X A CNA200810060562X A CN A200810060562XA CN 200810060562 A CN200810060562 A CN 200810060562A CN 101254997 A CN101254997 A CN 101254997A
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Abstract
The invention discloses a sludge denudation and dehydration method for coherent sludge through concentration and filtration, which is suitable for the dehydration treatment. The method comprises the step of denudation and quality adjusting, and the step of expression and filtration, wherein, the step of denudation and quality adjusting is as follows: a granulated denudation agent with 2 to 40 percent of sludge weight is doped in the sludge with 70 to 85 percent moisture content through concentration and filtration, the sludge is evenly mixed with the granulated denudation agent through being sufficiently stirred, the granulated denudation agent evenly mixed into the sludge increases the friction coefficient of the sludge, the slimy sludge is denuded and deteriorated; and the step of expression and filtration, namely, the sludge after through denudation and quality adjusting is delivered to a belt filter press for expression, filtration and dehydration with tension or dehydration through expression and filtration. The invention adopts the sludge denudation method to ensure the slimy sludge to be denudated and denatured, the friction coefficient of the sludge is increased, the sludge is not required to be laid out any more when being expressed and pressed, the default existing in the prior art is overcome, the belt filter press can effectively perform the slimy sludge treatment, and the dehydration speed and the dehydration dryness are both greatly improved.
Description
Technical field
The present invention relates to a kind of mud dewatering method, particularly a kind of processed that is applicable to is through sludge denuding dehydrolyzing method concentrated, filtering viscosity mud.
Background technology
Tough mud easy blocking filtering medium and influence the filter dehydration effect in the squeeze and filter dehydration.The measure that prior art is taked is a cleaning and regeneration of strengthening filtration medium, but problem is, stops up often to occur in before filter dehydration also do not finish, and is to carry out the filtration medium regenerated synchronously in dehydration.The plugged filtration media problem does not solve, and the filter dehydration effect just can not effectively improve.
The disclosed sludge pressing dewatering of Chinese patent application 200810059917.2 " a kind of sludge concentration bridging dehydration method " that the applicant submits to, it is place mat mat of particles layer on the filtration medium that belt filter press tension force squeezes or pressure is squeezed, between filtration medium and mud mud cake, Stilt layer is set, makes things convenient for the interior moisture press filtration of mud to deviate from.This sludge concentration bridging dehydration method is used for the bigger active sludge mud cake of filter dehydration viscosity ratio, and blocking filtering medium when having avoided viscosity mud by press filtration makes dewatering speed and squeezing mass dryness fraction increase substantially, and effect is remarkable.Yet, this dewatering is handled the mud of some stick-slips in dehydration industrial sludge, such as papermaking biochemical sludge, municipal sludge etc., because these mud stick-slip too, even taked the bridging measure of place mat particle bed course can not make the deviating from of water effective of mud inside, effect is not ideal.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the defective that prior art exists, and provides a kind of effectively processed through sludge denuding dehydrolyzing method concentrated, filtering viscosity mud.
The present invention addresses the above problem the technical scheme that is adopted: this sludge denuding dehydrolyzing method, be characterized in: comprise modified step of leanization and squeeze and filter step, carry out the squeeze and filter dehydration after leanization of mud process is modified again, the modified step of described leanization is to concentrate in process, filter, water ratio is 2～40% leanization of the particulate state agent of mixing mud weight in 70～85% the mud, fully stir and allow mud and leanization of particulate state agent uniform mixing, leanization of the particulate state agent of evenly sneaking into increases the frictional coefficient of mud, the mud that makes stick-slip is rotten by leanization, and described squeeze and filter step is the mud after modified through leanization to be transported to carry out the dehydration of tension force squeeze and filter on the belt filter press or to pressing the squeeze and filter dehydration.Before mud did not also enter the belt filter press filter-press dehydration, it was modified to carry out leanization, changed the character of mud stick-slip, mud after modified leanization is when bearing higher press dewatering pressure, because internal friction power increases, mud is drawout no longer, is convenient to the dehydration of degree of depth squeeze and filter; Simultaneously, leanization of the particulate state agent of evenly sneaking in the mud also can play " crane span structure " effect when mud carries out filter-press dehydration, the moisture in the mud is deviate from easily.
The agent of leanization of the described particulate state of sludge denuding dehydrolyzing method of the present invention is the particulate material of particle diameter greater than the used transition band aperture of squeeze and filter step.
The agent of leanization of the described particulate state of sludge denuding dehydrolyzing method of the present invention is slag or the ashes class material that yellow mud or thin yellow ground or wood chip or coal dust or crushing and screening are crossed, the add-on of leanization of particulate state agent is 10% of a mud weight, described mixing speed is 30～40 rev/mins, and churning time is 10～30 minutes.
The described squeeze and filter step of sludge denuding dehydrolyzing method of the present invention adopts sludge concentration bridging dehydration method, described sludge concentration bridging dehydration method is between the squeezing of belt filter press tension force or filtration medium that pressure is squeezed and mud Stilt layer to be set, described Stilt layer is to make things convenient for the particle bed course that the moisture press filtration is deviate from the mud, the particle of described particle bed course by the distributor place mat of device above belt filter press feed end filtration medium on filtration medium.
The present invention compared with prior art has the following advantages: 1, the present invention adopts leanization of mud hardening and tempering method, before the squeeze and filter dehydration, by in mud, mixing leanization agent, make the sex change of leanization of stick-slip mud, because leanization back mud frictional coefficient improves greatly, squeezing is mud drawout no longer during pressurized, has overcome the defective that prior art exists in handling stick-slip mud, makes belt filter press can effectively handle viscosity mud.2, leanization of mud of the present invention leanization of the particulate state agent of sneaking in modified is when mud carries out filter-press dehydration, also can play " crane span structure " effect, make moisture in the mud under the effect of strong external force, " crane span structure " by the agent of leanization of particulate state thus break away to be deviate from easily with mud.In addition, the squeeze and filter of after leanization of mud is modified, putting up a bridge dehydration, make the dewatering speed and the dehydration mass dryness fraction of viscosity mud increase substantially, utilizations such as the mud after the processed can directly act as a fuel, fertilizer, soil conditioner, or carry out landfill, burning etc. according to sludge quality and further dispose, widen the comprehensive utilization of mud, saved the disposal costs of mud.
Description of drawings
Fig. 1 is sludge denuding dehydrolyzing method embodiment 1 schema of the present invention.
Fig. 2 is sludge denuding dehydrolyzing method embodiment 2 schemas of the present invention.
Embodiment
Below by embodiment, in conjunction with the accompanying drawings the present invention is further described.
Embodiment 1:
This sludge denuding dehydrolyzing method comprises modified step of leanization and squeeze and filter step, does not enter that belt filter press carries out the tension force squeeze and filter or to first through modified leanization of pre-mixing before pressing the squeeze and filter dehydration at mud.Concentrate, filter in process, water ratio is 2～40% leanization of the particulate state agent of mixing mud weight in 70～85% the mud, fully stir and allow mud and leanization of particulate state agent uniform mixing, leanization of the particulate state agent of evenly sneaking into increases the frictional coefficient of mud, the mud of stick-slip is gone bad by leanization, finishes the first step of this sludge denuding dehydrolyzing method---the modified step of leanization; Mud by e Foerderanlage after will be through leanization modified is transported to and carries out the dehydration of tension force squeeze and filter on the belt filter press or to pressing the squeeze and filter dehydration.Mass dryness fraction through the dewatered sludge after the squeeze and filter dehydration reaches 50%, can directly fully utilize, and perhaps carries out follow-up disposal.The particulate material of particle diameter greater than the used transition band aperture of squeeze and filter step adopted in leanization of the particulate state agent that embodiment adds, slag or the ashes class material that can select for use yellow mud or thin yellow ground or wood chip or coal dust or crushing and screening to cross; The amount of leanization of particulate state agent is 10% of a mud weight; Mixing speed is controlled at 30～40 rev/mins, and churning time is 10～30 minutes.The operating process of present embodiment dewatering is referring to Fig. 1.
Embodiment 2:
Disclosed sludge concentration bridging dehydration method in the Chinese patent application 200810059917.2 " a kind of sludge concentration bridging dehydration method " that squeeze and filter step employing the applicant of present embodiment sludge denuding dehydrolyzing method submits to.Referring to Fig. 2, when sending into pressure filter and carry out the squeeze and filter dehydration by e Foerderanlage through the mud of leanization modifier treatment, take sludge concentration bridging dehydration method, above squeezing of belt filter press tension force or filtration medium, distributor is installed to squeezing, by distributor with the solid particulate matter place mat on filtration medium, the particle bed course that place mat forms at the solid particulate matter on the filtration medium makes between filtration medium and the mud Stilt layer, makes things convenient for the interior moisture press filtration of mud to deviate from.The modified step of leanization of present embodiment is same as embodiment 1.
Present embodiment can be applicable to the processing of the viscosity mud of difficult dehydration, improves filter-press dehydration efficient and mass dryness fraction that belt filter press is handled viscosity mud.Present embodiment is used for municipal sludge to be handled, coal dust is adopted in the agent of leanization of particulate state, through concentrating, after the preliminary hydro-extraction, water ratio is about 10% the coal dust that adds mud weight in the municipal sludge of 70%-85%, stirs leanization and delivers to belt filter press after modified and carry out press dewatering.The coal dust that adds has three effects, and the one, leanization mud, the 2nd, when press dewatering, can between filtration medium and mud, form aerial construction, the 3rd, the sludge calorific value after the dehydration is owing to the adding of coal dust is improved.Reduce significantly through mechanism filter-pressing dehydrated sludge moisture, water ratio can reach about 50%, and final processing the such as easily fully utilizing or burn can act as a fuel.
" leanization " of the present invention refer to change viscosity mud sticking, stick with paste, sliding characteristic, increase the frictional coefficient of mud when filter-press dehydration, mud drawout no longer under the squeezing pressurized, and the crane span structure effect that leanization of the particulate state agent of sneaking into is play all makes the mud contained humidity easily be sloughed by mechanism filter-pressing.
" mud " of the present invention be meant through concentrating, viscosity sludge cakes such as the industrial sludge of preliminary hydro-extraction or municipal sludge, its water ratio is generally about 70%-85%, rather than only through tentatively concentrate, water ratio starches at the fluidised form mud more than 90%.
Claims (4)
1, a kind of sludge denuding dehydrolyzing method, it is characterized in that: comprise modified step of leanization and squeeze and filter step, carry out the squeeze and filter dehydration after leanization of mud process is modified again, the modified step of described leanization is to concentrate in process, filter, water ratio is 2～40% leanization of the particulate state agent of mixing mud weight in 70～85% the mud, fully stir and allow mud and leanization of particulate state agent uniform mixing, leanization of the particulate state agent of evenly sneaking into increases the frictional coefficient of mud, the mud that makes stick-slip is rotten by leanization, and described squeeze and filter step is the mud after modified through leanization to be transported to carry out the dehydration of tension force squeeze and filter on the belt filter press or to pressing the squeeze and filter dehydration.
2, sludge denuding dehydrolyzing method according to claim 1 is characterized in that: the agent of described leanization of particulate state is the particulate material of particle diameter greater than the used transition band aperture of squeeze and filter step.
3, sludge denuding dehydrolyzing method according to claim 2, it is characterized in that: the agent of described leanization of particulate state is slag or the ashes class material that yellow mud or thin yellow ground or wood chip or coal dust or crushing and screening are crossed, the add-on of leanization of particulate state agent is 10% of a mud weight, described mixing speed is 30～40 rev/mins, and churning time is 10～30 minutes.
4, according to claim 1 or 3 described sludge denuding dehydrolyzing methods, it is characterized in that: described squeeze and filter step adopts sludge concentration bridging dehydration method, described sludge concentration bridging dehydration method is between the squeezing of belt filter press tension force or filtration medium that pressure is squeezed and mud Stilt layer to be set, described Stilt layer is to make things convenient for the particle bed course that the moisture press filtration is deviate from the mud, the particle of described particle bed course by the distributor place mat of device above belt filter press feed end filtration medium on filtration medium.
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| CNA200810060562XA CN101254997A (en) | 2008-03-28 | 2008-03-28 | Sludge denuding dehydrolyzing method |
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| CNA200810060562XA CN101254997A (en) | 2008-03-28 | 2008-03-28 | Sludge denuding dehydrolyzing method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886811A (en) * | 2010-05-21 | 2010-11-17 | 尹小林 | Method for coprocessing sludge with high moisture content by novel dry-process rotary kiln |
| CN101928623A (en) * | 2010-09-03 | 2010-12-29 | 卢秉威 | Preparation method of sludge straw biomass fuel |
| CN102649618A (en) * | 2011-02-24 | 2012-08-29 | 杭州富江过滤机有限公司 | Method for treating sewage sludge by wood chips |
| CN103011548A (en) * | 2012-12-27 | 2013-04-03 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Conditioner for combinedly conditioning sludge and method for dehydrating sludge through utilizing conditioner |
| CN103648990A (en) * | 2011-03-03 | 2014-03-19 | 液压机控股有限责任公司 | System and method for treating waste |
| CN104250573A (en) * | 2014-09-19 | 2014-12-31 | 沈阳建筑大学 | Fuel and preparation method thereof |
| CN104445854A (en) * | 2014-10-25 | 2015-03-25 | 傅小娟 | Sludge dewatering method and equipment |
| CN104445863A (en) * | 2014-12-31 | 2015-03-25 | 梁毅 | Method for achieving deep sludge dehydration and energy utilization on plate-and-frame filter press |
| CN104445853A (en) * | 2014-10-25 | 2015-03-25 | 陈列鑫 | Method and equipment for realizing deep dehydration of sludge by using straws and sawdust |
| CN104529127A (en) * | 2014-12-31 | 2015-04-22 | 梁毅 | Sludge dewatering method for coating plate-and-frame filter press with filter aid medium in advance |
| CN108689567A (en) * | 2017-04-05 | 2018-10-23 | 沈阳绿色环保能源科技有限公司 | Hydraulic biomass filtrate sludge dewatering equipment |
-
2008
- 2008-03-28 CN CNA200810060562XA patent/CN101254997A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886811A (en) * | 2010-05-21 | 2010-11-17 | 尹小林 | Method for coprocessing sludge with high moisture content by novel dry-process rotary kiln |
| CN101928623A (en) * | 2010-09-03 | 2010-12-29 | 卢秉威 | Preparation method of sludge straw biomass fuel |
| CN102649618A (en) * | 2011-02-24 | 2012-08-29 | 杭州富江过滤机有限公司 | Method for treating sewage sludge by wood chips |
| CN103648990A (en) * | 2011-03-03 | 2014-03-19 | 液压机控股有限责任公司 | System and method for treating waste |
| CN103011548A (en) * | 2012-12-27 | 2013-04-03 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Conditioner for combinedly conditioning sludge and method for dehydrating sludge through utilizing conditioner |
| CN104250573A (en) * | 2014-09-19 | 2014-12-31 | 沈阳建筑大学 | Fuel and preparation method thereof |
| CN104445854A (en) * | 2014-10-25 | 2015-03-25 | 傅小娟 | Sludge dewatering method and equipment |
| CN104445853A (en) * | 2014-10-25 | 2015-03-25 | 陈列鑫 | Method and equipment for realizing deep dehydration of sludge by using straws and sawdust |
| CN104445853B (en) * | 2014-10-25 | 2017-03-08 | 丁海港 | A kind of method and apparatus realizing deeply dehydrating sludge with straw and wood flour |
| CN104445863A (en) * | 2014-12-31 | 2015-03-25 | 梁毅 | Method for achieving deep sludge dehydration and energy utilization on plate-and-frame filter press |
| CN104529127A (en) * | 2014-12-31 | 2015-04-22 | 梁毅 | Sludge dewatering method for coating plate-and-frame filter press with filter aid medium in advance |
| CN108689567A (en) * | 2017-04-05 | 2018-10-23 | 沈阳绿色环保能源科技有限公司 | Hydraulic biomass filtrate sludge dewatering equipment |
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