CN101343138B - Filling material duty cycle operation method for auxiliary sludge dewatering - Google Patents
Filling material duty cycle operation method for auxiliary sludge dewatering Download PDFInfo
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- CN101343138B CN101343138B CN2008101202965A CN200810120296A CN101343138B CN 101343138 B CN101343138 B CN 101343138B CN 2008101202965 A CN2008101202965 A CN 2008101202965A CN 200810120296 A CN200810120296 A CN 200810120296A CN 101343138 B CN101343138 B CN 101343138B
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Abstract
The invention discloses a method for making a filler be recycling-used, and the filler assists sludge to be dehydrated. The method comprises a procedure of mixing a filler and sludge, a procedure of pressing and dehydrating and a procedure of recovering the filler. Wherein, the filler and the sludge are mixed by the methods of mixing outside the machine and mixing inside the machine. The method of mixing outside the machine means that the concentrated and dehydrated sludge is mixed with the filler before the sludge enters into a pressing and filtering equipment. The method of mixing inside the machine means that when the sludge enters into the pressing and filtering equipment to be pressed and dehydrated, the filler is evenly spread on a filtering medium so that a filler layer, which can increase the friction force of pressing and dehydrating the sludge, is formed between the sludge and the filtering medium. Recovering the filler means that the filler is separated from the sludge which is output from the pressing and filtering equipment and is mixed with the filler, and the filler is sent back to the procedure of mixing the filler and the sludge to be recycling used. The method has the advantages that the filler and the sludge are directly mixed and spread on the filtering medium, so the friction force of the sticky sludge is increased, thereby preventing the sludge from running away and improving the production efficiency of pressing and dehydration; and the filler is recycling used, so the operation cost is reduced. Thus, the method has higher economic and practical value.
Description
Technical field
The filler that the present invention relates to a kind of filler using method, particularly a kind of auxiliary sludge dewatering in the sludge dewatering process recycles method, is used for the mud of processed through concentrating, filtering, and especially is fit to processed viscosity mud.
Background technology
Content of organics height, the viscosity mud that moisture content is high run mud because of easy appearance in the process of belt filter press press dewatering, phenomenons such as the generation charging is not smooth, cause the work that belt filter press can not continous-stable, the output of press dewatering equipment is affected, production efficiency reduces.The Chinese patent application 200810060562.X " a kind of sludge denuding dehydrolyzing method " that the applicant submits to discloses a kind of sludge denuding dehydrolyzing method that is applicable to the dehydration of viscosity sludge pressing.This denuding dehydrolyzing method is before the sludge pressing dehydration, adopt agent of leanization of graininess and process to concentrate, filter, moisture content is that 70～85% mud fully stirs, leanization of the graininess agent of sneaking into has increased the coefficient of friction of mud, make the mud of stick-slip rotten by leanization, solved the problem that viscosity mud produces in press dewatering, can bear bigger squeeze pressure dehydration, at squeezing drawout no longer during pressurized, be convenient to the dehydration of degree of depth squeeze and filter, tackify greatly mud dewatering speed and the dehydration mass dryness fraction, make belt filter press can effectively handle viscosity mud.Yet in actual production, the mud of heterogeneity need select different leanization agent to realize denuding dehydrolyzing, will carry out a large amount of experiments and seek a kind of suitable leanization agent; After suitable leanization agent is determined in experiment, also to consider sufficient supply guarantee; And in denuding dehydrolyzing operating cost, the ratio that leanization agent accounts for is higher, generally about 20%-50%.Therefore, sludge denuding dehydrolyzing method is applied in actual production and is had certain limitation.
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 filler of auxiliary sludge dewatering to recycle method, realizes economic, the mud, particularly viscosity mud of processed through concentrating, filtering efficiently.
The present invention addresses the above problem the technical scheme that is adopted: the filler of this auxiliary sludge dewatering recycles method, be characterized in: this filler recycles method and comprises filler and mud blend step, press dewatering step and filler recycling step, described filler and mud blend step are taked machine to mix with machine is interior outward to mix two kinds of hybrid modes, the outer mixing of described machine will be through concentrating, dehydration, moisture content 70～85% mud with mix before filler is entering squeeze filter equipment, when being blended in mud in the described machine and entering squeeze filter equipment and carry out press dewatering, lay filler equably on filter medium, thereby between mud and filter medium, form the packing layer that can strengthen sludge pressing dehydration frictional force, described filler recycling step will be through the press dewatering step, filler from the Packed mud of mixing that the squeeze filter equipment discharging opening comes out is separated, and sends filler back to and the mud blend step recycles.Be blended in the filler in the mud and be laid in the stick-slip characteristic that filler on the filter medium has changed viscosity mud, increased the anti-pressure ability of mud, prevent that mud from occur running the phenomenon that mud etc. influences press dewatering, makes mud can take off more water in the limited squeezing time; Recycle filler, greatly reduced operating cost.
The filler of auxiliary sludge dewatering of the present invention recycles the described filler recycling step of method and takes mainly by reductor, conveyor screw roller, is contained in agitating roller and bottom on the shaft and has filler sludge extractor that the shell of sieve aperture or sieve seam forms and carry out mud and separate with filler, and described separation process is:
1. stir and smash: through the mud and the filler mixture of press dewatering step, enter from the charging aperture of filler sludge extractor, stir by the agitating roller on the shaft that is contained in rotation, the mud that mixes is smashed with filler separated, shaft is by the reductor driven rotary;
2. screen mud: smash sieve aperture that mud after the separation and the mud in the filler mixture has through filler sludge extractor outer casing bottom or sieve and sew and screen, fall from the mud discharging opening that is positioned at filler sludge extractor front end, shaft below;
3. discharge filler: sieve aperture that outer casing bottom has or sieve seam block smashes isolated filler, and the conveyor screw roller that filler is driven by reductor is delivered to the filler discharging opening that is positioned at filler sludge extractor rear and drops.Take the filler sludge extractor to realize that mud effectively separates with filler, be convenient to filler and recycle.
The filler of auxiliary sludge dewatering of the present invention recycles the described reductor of method and adopts cycloidal planetary gear speed reducer, described shaft is by cycloidal planetary gear speed reducer and sprocket wheel driven rotary, and described conveyor screw roller is driven by cycloidal planetary gear speed reducer and double strand chain shaft coupling.
The filler of auxiliary sludge dewatering of the present invention recycles the outer hybrid mode of the described machine of method and takes mixer that mud and filler are evenly stirred, and described mixer speed of agitator is controlled at 10～50 rev/mins, and mixing time is 5～20 minutes.
The filler of auxiliary sludge dewatering of the present invention recycle in the described machine of method hybrid mode take distributing device with the filler place mat on filter medium, described distributing device is installed in the filter medium top of squeeze filter equipment feed end.
The described press dewatering step of method that recycles the filler of auxiliary sludge dewatering of the present invention adopts the concentration bridging dehydration method that Stilt layer is set between the tension force squeezing of belt squeeze filter equipment or filter medium that pressure is squeezed and mud, described Stilt layer is to make things convenient for the packing layer that the moisture press filtration is deviate from the mud.
It is block or the circular or solid matter by tiing a knot, being bonded together of strip or graininess that the filler of auxiliary sludge dewatering of the present invention recycles the described filler of method, described filler material is selected according to the different qualities of processed mud, viscosity mud is selected the filler of elastic material for use, and non-sticky mud is selected the filler of non-resilient material for use.Filler of the present invention is different from the leanization agent in " a kind of sludge denuding dehydrolyzing method ", and filler appearance and size selects for use scope wideer much larger than leanization agent, has better mud effect admittedly, is convenient to again use with the mud separating cycle.
It is the 2%-50% of mud weight that the filler of auxiliary sludge dewatering of the present invention recycles the described filler mixing of the method amount of inserting.
The filler of auxiliary sludge dewatering of the present invention recycles the described elastic material filler of method and adopts knotting filter cloth or rubber or sponge, and described non-resilient material filler adopts plastic sheet.
The present invention compared with prior art has the following advantages: 1, the present invention adopts filler and mud directly to mix and is laid on the filter medium, increase the frictional force of viscosity mud, improve the anti-pressure ability of mud, prevent the phenomenon that viscosity mud such as running mud is easy to generate in the press dewatering process, and make things convenient for sludge pressing to dewater, reduce the moisture content of discharging mud, improve the press dewatering efficiency of equipment.2, the used filler appearance and size of the present invention makes it have better mud effect admittedly greater than leanization agent, is convenient to again use with the mud separating cycle; Filler selects for use the agent of more leanization of scope wide, supplies easier guarantee; Utilize mud and filler material, and the difference on the size, take the filler sludge extractor to carry out mud and effectively separate with filler, realize that filler recycles, greatly reduce operating cost; The use amount of filler can also be higher than leanization agent, the stick-slip characteristic of viscosity mud is better improved, and the present invention has overcome the limitation that prior art is applied existence, has higher economical efficiency and practicality.
Description of drawings
Fig. 1 recycles method flow diagram for the filler of embodiment auxiliary sludge dewatering.
Fig. 2 is the structural representation of the filler sludge extractor of embodiment employing.
Fig. 3 is shaft and a conveyor screw roller installation site schematic diagram among Fig. 2.
The specific embodiment
Below by embodiment, in conjunction with the accompanying drawings the present invention is further described.
Referring to Fig. 1, the filler of embodiment auxiliary sludge dewatering recycles method flow and comprises filler and mud blend step I, press dewatering Step II and filler recycling step III.
Filler takes machine to mix I-1 and the interior two kinds of hybrid modes of I-2 of mixing of machine outward with mud blend step I, concentrate, dewater in process, moisture content mixes the filler of mud weight 2～50% in 70～85% mud, the filler incorporation is looked sludge components, water content control and regulation.The filler employing is strip or graininess is block or circular or by knotting, the non-resilient material that is bonded together or the solid matter of elastic material, non-elastic material can be plastic sheet, and elastomeric material can be knotting filter cloth or rubber or sponge.Use the filler material to select according to the different qualities of processed mud, content of organics height in the viscosity mud, then mud is just more sliding, the mud phenomenon appears running in the process of press dewatering easily, the filler of selecting for use should be able to farthest strengthen the frictional force of mud, generally can select the filler of elastic material for use, be similar to the rubber of pad such as tie a knot filter cloth or shape, during press dewatering, rubber sheet gasket can be fixed on mud in the pad, and in the compressed while of pad, mud also is compressed, water in the mud will remove by filter bag, both prevent to run the generation of mud phenomenon, be beneficial to again mud is pressed dry.Inorganic matter or fiber content are higher in the non-sticky mud, the frictional force of mud self is very big, can select the filler of non-resilient material for use, shape can be strip or bulk, such as plastic sheet, only needing increases some frictional force to mud slightly by filler, and the mud phenomenon just can not appear running in mud in expressing process.Present embodiment is handled through the municipal sludge that concentrates, filters, and moisture content is 70～85%, and the filler of selecting for use is knotting filter cloth bar, and incorporation is 10～50% of a mud weight.Machine mixes I-1 outward and mixed with filler before mud enters squeeze filter equipment, adopts rotating speed at 10～50 rev/mins mixer, carries out 5～20 minutes abundant stirring, reaches mud and mixes with uniform filling; Mix I-2 in the machine and be when entering squeeze filter equipment through the Packed mud of even mixing that mixes I-1 outside the machine and carry out press dewatering, take the applicant's disclosed Stilt layer method that moisture is deviate from the mud that is beneficial to of between filter medium and mud, laying in Chinese patent application 200810059917.2 " a kind of sludge concentration bridging dehydration method ", the distributing device of filter medium top that employing is installed in the squeeze filter equipment feed end with the filler place mat on filter medium, thereby between mud and filter medium, form the packing layer that can strengthen sludge pressing dehydration frictional force, increase the coefficient of friction of mud, prevent that mud from appearring running in mud in the press dewatering process.
The press dewatering Step II is to carry out on the mechanical expression filter plant, and embodiment adopts belt filter press.The press dewatering process using is provided with the concentration bridging dehydration technology that makes things convenient for the Stilt layer that the moisture press filtration is deviate from the mud between in the squeezing of the tension force of belt squeeze filter equipment or to the filter medium of squeezing and mud, and Stilt layer is the packing layer that mixes I-2 lay on filter bag in the machine.To mix the mud of I-1 through filler and the machine of mud blend step I outward by conveying device, send into the charging aperture of belt filter press, have the filter bag of packing layer to carry out the squeeze and filter dehydration by pressure roller and place mat, the dewatered sludge mass dryness fraction of dewatering through squeeze and filter reaches 60%.
Filler recycling step III will be through the press dewatering Step II, and the filler from the Packed dewatered sludge of mixing that the squeeze filter equipment discharging opening comes out is separated, and sends filler back to and mud blend step 1 recycles.Embodiment takes the filler sludge extractor to carry out mud to separate with filler, referring to Fig. 2,3, this filler sludge extractor is mainly by cycloidal planetary gear speed reducer 1, double strand chain shaft coupling 2, reductor base 3, conveyor screw roller 4, mud discharging opening 5, shell 6, filler discharging opening 7,12A sprocket wheel 8, shaft 9, agitating roller 10 and charging aperture 11 are formed, the bottom of its shell 6 has sieve aperture or sieve seam, present embodiment has sieve aperture shape aperture, charging aperture 11 belows one in front and one in back are provided with two shafts 9, equidistant on the every shaft 9 20 agitating rollers 10 are housed, agitating roller 10 and shaft 9 vertical installations, the angle of two adjacent agitating rollers 10 is 90 degree, and agitating roller 10 is fixed on the shaft 9 by screw mandrel and nut.The filler sludge extractor is a power with cycloidal planetary gear speed reducer 1, drives 4 rotations of conveyor screw roller by double strand chain shaft coupling 2; Shaft 9 is fixed on the 12A sprocket wheel 8 that is connected with cycloidal planetary gear speed reducer 1, and cycloidal planetary gear speed reducer 1 drives 12A sprocket wheel 8 and rotates, and the 12A sprocket wheel 8 of rotation drives shaft 9 and rotates.
The filler sludge extractor divides mud and filler and separated for three steps:
The first step stirs and smashes, mass dryness fraction through the press dewatering Step II is 60% the mud and the filter cloth bar mixture of tiing a knot, enter separator from the charging aperture 11 of filler sludge extractor, utilize the difference of mud and filler knotting filter cloth on material, size, by the agitating roller 10 on the shaft 9 that is contained in rotation filler and mud are stirred, the mud that mixes is smashed with filler separated.
Second step screening mud, be less than or equal to 60% through the moisture percentage in sewage sludge behind the press dewatering, this moment, mud was Powdered, by stirring, the mud powder is separated with regard to broken with the knotting filter cloth, smashes that sieve aperture shape aperture that mud after the separation and the mud in the filler mixture has through shell 6 bottoms is screened to come out, via mud discharging opening 5 dischargings that are positioned at filler sludge extractor front end, shaft 9 belows, directly fully utilize, perhaps carry out follow-up disposal.
The 3rd step was discharged filler, the sieve aperture shape aperture that shell 6 bottoms have blocks smashes isolated filler knotting filter cloth bar, knotting filter cloth bar is transferred propellers 4 and is delivered to the filler discharging opening 7 that is positioned at filler sludge extractor rear and drops, send mixer or feeder back to by conveyer again, realize recycling of filler.
Also can select for use the separator of other form to separate according to handling mud with the material of selecting filler for use.
Claims (8)
1. the filler of an auxiliary sludge dewatering recycles method, it is characterized in that: this filler recycles method and comprises filler and mud blend step, press dewatering step and filler recycling step, described filler and mud blend step are taked machine to mix with machine is interior outward to mix two kinds of hybrid modes, the outer mixing of described machine will be through concentrating, dehydration, moisture content 70～85% mud with mix before filler is entering squeeze filter equipment, when being blended in mud in the described machine and entering squeeze filter equipment and carry out press dewatering, lay filler equably on filter medium, thereby between mud and filter medium, form the packing layer that can strengthen sludge pressing dehydration frictional force, described filler recycling step will be through the press dewatering step, filler from the Packed mud of mixing that the squeeze filter equipment discharging opening comes out is separated, and sends filler back to and the mud blend step recycles.
2. the filler of auxiliary sludge dewatering according to claim 1 recycles method, it is characterized in that: described filler recycling step takes mainly by reductor, conveyor screw roller, be contained in agitating roller and bottom on the shaft has filler sludge extractor that the shell of sieve aperture or sieve seam forms and carries out mud and separate with filler, and described separation process is:
1. stir and smash: through the mud and the filler mixture of press dewatering step, enter from the charging aperture of filler sludge extractor, stir by the agitating roller on the shaft that is contained in rotation, the mud that mixes is smashed with filler separated, shaft is by the reductor driven rotary;
2. screen mud: smash sieve aperture that mud after the separation and the mud in the filler mixture has through filler sludge extractor outer casing bottom or sieve and sew and screen, fall from the mud discharging opening that is positioned at filler sludge extractor front end, shaft below;
3. discharge filler: sieve aperture that outer casing bottom has or sieve seam block smashes isolated filler, and the conveyor screw roller that filler is driven by reductor is delivered to the filler discharging opening that is positioned at filler sludge extractor rear and drops.
3. the filler of auxiliary sludge dewatering according to claim 2 recycles method, it is characterized in that: described reductor adopts cycloidal planetary gear speed reducer, described shaft is by cycloidal planetary gear speed reducer and sprocket wheel driven rotary, and described conveyor screw roller is driven by cycloidal planetary gear speed reducer and double strand chain shaft coupling.
4. the filler of auxiliary sludge dewatering according to claim 1 recycles method, it is characterized in that: the outer hybrid mode of described machine takes mixer that mud and filler are evenly stirred, described mixer speed of agitator is controlled at 10～50 rev/mins, and mixing time is 5～20 minutes.
5. the filler of auxiliary sludge dewatering according to claim 4 recycles method, it is characterized in that: in the described machine hybrid mode take distributing device with the filler place mat on filter medium, described distributing device is installed in the filter medium top of squeeze filter equipment feed end.
6. the filler according to claim 3 or 5 described auxiliary sludge dewaterings recycles method, it is characterized in that: described filler is block or the circular or solid matter by tiing a knot, being bonded together of strip or graininess, described filler material is selected according to the different qualities of processed mud, viscosity mud is selected the filler of elastic material for use, and non-sticky mud is selected the filler of non-resilient material for use.
7. the filler of auxiliary sludge dewatering according to claim 6 recycles method, it is characterized in that: it is 2%～50% of mud weight that described filler mixes the amount of inserting.
8. the filler of auxiliary sludge dewatering according to claim 7 recycles method, it is characterized in that: described elastic material filler adopts knotting filter cloth or rubber or sponge, and described non-resilient material filler adopts plastic sheet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101202965A CN101343138B (en) | 2008-08-18 | 2008-08-18 | Filling material duty cycle operation method for auxiliary sludge dewatering |
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| CN2008101202965A CN101343138B (en) | 2008-08-18 | 2008-08-18 | Filling material duty cycle operation method for auxiliary sludge dewatering |
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| CN101343138B true CN101343138B (en) | 2010-12-29 |
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| CN104817246B (en) * | 2015-03-25 | 2017-02-22 | 中国计量大学 | Ultrahigh-pressure deep dehydration method for sewage sludge |
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Denomination of invention: Filling material duty cycle operation method for auxiliary sludge dewatering Effective date of registration: 20180802 Granted publication date: 20101229 Pledgee: Bank of Hangzhou Limited by Share Ltd Tongxiang branch Pledgor: Zhejiang Huazhang Technology Co., Ltd. Registration number: 2018330000216 |