CN106542718A - The method that deep dehydration is carried out to sludge - Google Patents
The method that deep dehydration is carried out to sludge Download PDFInfo
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- CN106542718A CN106542718A CN201510610023.9A CN201510610023A CN106542718A CN 106542718 A CN106542718 A CN 106542718A CN 201510610023 A CN201510610023 A CN 201510610023A CN 106542718 A CN106542718 A CN 106542718A
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Abstract
The method that the present invention carries out deep dehydration to sludge, is dehydrated using plate compression type device for dehydrating sladge waste, and its step includes：(1) equipment inspection；(2) high polymer coagulant and chemical conditioner are prepared；(3) sludge is extracted；(4) add chemical conditioner and high polymer coagulant, dispersion and react；(5) sludge pump work；(6) filter-press dehydration；(7) dump；(8) reference record；(9) equipment cleaning；The polymer coagulant that the present invention is adopted is a kind of cationic organic polymer flocculating agent with backbone, has many active cation groups on chain, can neutralize the negative electrical charge on mud granule and while cohere multiple mud granules, is conducive to dehydration；The chemical conditioner is a kind of highly active vegetable fiber, can change and increase sludge flocculation structure, builds mesh skeleton.The moisture content of Jing dehydrated sludges of the present invention is less than 60%, and before and after being dehydrated, in sludge, content of organics and sludge calorific value are held essentially constant, and are conducive to follow-up anhydration and incineration to process, with significant governance advantages.
Description
Technical field
The present invention relates to environmental protection technical field, and in particular to the treatment technology of sludge, it is method that a kind of agent of utilization high efficiency composition and auxiliary agent carry out deep dehydration to sludge.
Background technology
Sewage disposal is one of important content of environmental improvement.And sludge is the inevitable outcome of sewage disposal.According to statistics, 10,000 tons of sewage are often processed and will produces 9 tons of the sludge that moisture content is 80%.By 2013, China's year sludge yield was 48,950,000 tons or so, but to the safe handling rate of sludge less than 5%.This is must to pay attention to and have effective processing method and means.
The sludge that present patent application is related to mainly has following several：(1) primary sludge：The sludge that finger is produced in sewage disposal stage treatment process, i.e., the sludge for precipitating in preliminary sedimentation tank, its moisture content generally 96%～98%.(2) excess sludge：The sludge discharged in referring to the secondary treatment process such as the biochemical processing process in sewage disposal, its moisture content is typically more than 99.2%.(3) digested sludge：When referring to sewage disposal, primary sludge, excess sludge reach stabilisation, innoxious sludge, the most of digested decomposition of organic matter therein, while the parasite and pathogenic microorganism in sludge is killed Jing after digestion process.(4) chemical sludge：The sludge that produces, the such as sediment of the generation such as lime method dephosphorization, acid, alkali waste water and electrolysis in flocculation sediment and Chemical deep processing procedure when referring to sewage disposal.
The process of sludge is primarily referred to as sludge is carried out stabilizing, minimizing, the process of innoxious and resource, generally comprise concentration（Conditioning）, dehydration, anaerobic digestion, aerobic sigestion, lime stabilization, burning, compost, mummification and comprehensive utilization etc..At present, can the sludge treatment method of large-scale engineering application mainly have three kinds：First, burn（The product of burning is used to fill or make building materials）；2nd, Land_use change；3rd, fill.Specially：
（1）Burn.When the combustion heat value of sludge itself is higher or sludge in levels of toxic substances is higher can not be utilized when, can adopt incineration disposal method.Burn it is previous as first should carry out being dehydrated, drying and other treatment to be to reduce load and energy consumption.The temperature of sludge incineration can reach 850 DEG C, the whole organic matters that can be destroyed in sludge, kills all pathogen and reduces sludge volume to greatest extent（Only 10% of original volume or so）.As the residue after burning there occurs radical change in nature so as to which final disposal is relatively easy to：Lime-ash can be used to make building materials or landfill；The used heat of sludge incineration simultaneously can be used to generate electricity, and reach the purpose of recycling sludge.
（2）Land_use change（Do not include agricultural）.In most developing countries, Land_use change and the main path that landfill is sludge treatment, but with the growing tension in soil, the place that can be used to fill is fewer and feweri, therefore, Land_use change（Do not include agricultural）To be a main development direction of sludge treatment.At present, the Land_use change of sludge essentially consists in forestry, greening and soil improvement.On the one hand it is to promote arboreal growth using the nutrient content in sludge and trace element；On the other hand it is that, as the forestry greening in non-densely inhabited district's sludge is using will not typically be directly entered human foods chain, and forest land, the area in deserted mountain are larger, the capacity of environment is also big, can receive substantial amounts of sludge：Not only forest itself can utilize nitrogen in sludge, phosphorus tachyauxesis, and deserted mountain can be by the use of sludge as soil conditioner, and the self purification of soil（Including modes such as biodegradable, chemical complexing, oxidationreduction, physical absorptions）Can be by some sludge direct mineralization of organic material and humification.Therefore, the mode of Land_use change is less to the direct risk of the mankind, substantial amounts of sludge of can dissolving.
（3）Landfill.Two kinds of simple landfill and sanitary landfills can be divided into by environmental requirement landfill." simple to fill " refers to, carries out the land-fill method of earthing burial using the physical relief such as low lying areas or mountain valley basin, and it is only the mode for temporarily solving municipal sludge outlet, is worthless from the point of view of long-term benefit." sanitary landfills " is referred to, while using nature metabolic function, by engineering means and environmental practice, make sludge obtain safe dissolving and progressively reach and stablize harmless sludge treating method, it is mainly the sanitary landfills of the household refuse landfill sites that city is built by engineering experience.
But, what the mode of current burning, Land_use change and landfill still came with some shortcomings.For example：Burn, need first effectively to be dehydrated sludge.And the moisture content for passing through the sludge of conventional processed at present is 80%.This will increase the load of sludge incineration and energy consumption.For another example：Though Land_use change possesses some good points, if to be applied to soil improper for sludge, it is easy to cause the secondary pollution of environment.Though sludge source is different, typically can more or less contain a certain amount of heavy metal.If these heavy metals enter soil with sludge, it is possible to certain harm is caused to soil.The animal migration of Heavy Metals in Sludge is poor, it is easy to accumulated in upper soll layer.Some heavy metals, such as mercury（Hg）, cadmium（Cd）, lead（Pb）, will show to poison under very low concentration conditions affects.Further, heavy metal can move to deep subsoil with rain leaching or voluntarily, produce impact to top layer underground water.Once the heavy metal in sludge will produce harm to health into human foods chain.Therefore, it is that needs are strict to the Land_use change of sludge to control.For another example, though the technology of landfill is simple, at home and abroad there is successful case history.But, landfill disposal, due to moisture percentage in sewage sludge it is higher, the soil mechanics stability of the sludge after landfill is not enough, it is difficult to the weight of carried and transported car and Bulldozer, makes landfill yard be difficult normally to be filled dozing, also sludge landfill is made normally to use, the land resource of a large amount of preciousnesses will not only being taken, and the sludge for filling wanting complete stabilityization experience a very long process of comparison, sludge percolate and odor pollution are also possible to secondary pollution be caused to environment.Therefore, technical lifting is also required for the landfill of sludge.
The method of disposal of above-mentioned three kinds of sludge all has very high requirement to the moisture content of sludge.The presently relevant governance standard of China（GBT 23485-2009）Be defined as：The moisture content of dehydrated sludge should be less than 60%.But, as the content of organics of sludge is high, particle is tiny, and hydrophily is strong, and specific surface area is big, and the characteristic of strong colloform texture causes sludge dewatering difficult.In sludge, contained humidity can be divided into Free water, capillary water, attached water and particle internal water, wherein, Free water accounts for the 70% of total moisture, and capillary water accounts for 20%, and hydration inside attached water and particle accounts for about 10%；Described, Free water is easily removed by the mechanical force for concentrating or applying very little, and capillary water, attached water and particle internal water be because have the effect of multi-form between mud granule, therefore, it is difficult to removing.Additionally, the extracellular polymeric on sludge flco surface（EPS）And another big crux that sludge dewatering is difficult.By the polymerization macromolecule material composition such as polysaccharide, protein, nucleic acid, these polymer can produce viscous force to the extracellular polymeric, form the powered floc-matrix of three-dimensional, similar gels height aquation, show high degree of hydration effect and unfavorable to sludge dewatering.In addition, sludge is easily deformed under high pressure effect, after filtration the phase can block the space of filter cake, block the filtration channel of water, under causing mechanical dehydration less efficient.So, the moisture content of current dehydrated sludge cake typically up to 80% or so, therefore, in treating sludge, sludge is dehydrated into a trouble but important work.
Sludge dewatering, mainly has nature mummification dehydration, mechanical dehydration and conditioning three kinds of modes of dehydration at present.Wherein, natural mummification dehydration is sludge stand to be put on drying bed, by modes such as evaporation, infiltration and clear liquid overflows, realizes the dehydration of sludge, and it is common in the Treatment of Sludge of small sewage treatment plant.But, as the management workload of natural mummification dehydration is big, and a range of stench can be produced, environment be had an impact, therefore has been rarely employed this kind of dewatering type at present.And mechanical dehydration is to carry out sludge dewatering using plant equipment, it is divided into three kinds of vacuum filtering and dewatering, filter-press dehydration and centrifugal dehydration again, and its floor space is few, and stench affects little, but the operation and maintenance cost of equipment is higher.The conditioning dehydration mainly has the modes such as medicament conditioning, heat conditioning, freezing conditioning, ultrasonic wave conditioning dehydration, and what current China's domestic application was more is medicament conditioning, exactly carries out deep dehydration to sludge using conditioner.At present in this respect, it is using more method that lime adds ferric trichloride：With sludge butt than calculating, the amount of lime for adding is 30～40%, and the tri-chlorination iron for adding is 10～15%.Because the inorganic matter amount for adding is big, amount of dry matter was both increased, provided sludge skeleton again.Moisture percentage in sewage sludge Jing after the conditioning of inorganic medicament can be met below 60%, and its shearing strength is also greater than 25KN/cm2Requirement, can preferably carry out landfill operation.But, lime adds the tri-chlorination iron deficioncy to be：Conditioning added amount of chemical is excessive, increased the butt amount of sludge, although sludge energy volume reduction about 25%, but butt amount also increases 25%, and the property of sludge there occurs very big change, content of organics and sludge calorific value decline to a great extent, and its approach for utilizing of subsequently being carried out a biological disposal upon or burned is restricted.Therefore, in sludge dewatering technical field, need research and find new administering method.
The content of the invention
It is an object of the invention to solve above-mentioned deficiency, a kind of method for carrying out deep dehydration to sludge is provided, it adopts polymer coagulant and chemical conditioner, can make before and after dehydration that content of organics and sludge calorific value are held essentially constant in sludge, is that follow-up anhydration and incineration processes the adaptability for keeping stronger；Additionally, in sludge dehydration process, there are in terms of dosing cost and mud decrement economic advantages, can be used for the deep dehydration of sludge.
For achieving the above object, this invention takes technical scheme below.
A kind of method for carrying out deep dehydration to sludge, is dehydrated using plate compression type device for dehydrating sladge waste and using high polymer coagulant and chemical conditioner to sludge, it is characterised in that its step includes：
（1）Equipment is checked
Closure sheet frame filter press-type sludge dewatering equipment, checks the situation of equipment and pipeline connection；
（2）Prepare high polymer coagulant and chemical conditioner
1. the preparation of high polymer coagulant
Using modified form PAMC（PAM）As high polymer coagulant, modified form modified form PAMC is dissolved in water in ratio of the modified form modified form PAMC than water=1 ︰ 1000, stirring and dissolving 60 minutes, constitute high polymer coagulant and preserve stand-by；
2. the preparation of chemical conditioner
Using highly active vegetable fiber as chemical conditioner, as chemical conditioner is a kind of highly active vegetable fiber, highly active vegetable fiber is infiltrated 30 minutes in water by ratio that need to be in highly active vegetable fiber than water=1 ︰ 5, is constituted string chemical conditioner and is preserved stand-by；
（3）Sludge is extracted
Raw sewage is extracted to sludge conditioning retort, is stirred with the rotating speed of 40～60r/min, the moisture content of sludge is then measured by sampling；
（4）Addition chemical conditioner and high polymer coagulant, dispersion and reaction
1. the addition of chemical conditioner
By step（2）The chemical conditioner of preparation is added to step for five to ten five the percent of over dry sludge consumption standard by chemical conditioner（3）Conditioning tank in, 30min is stirred to being well mixed with the rotating speed of 40～80r/min；
2. the addition of high polymer coagulant
By step（2）Consumption standard of the high polymer coagulant of preparation by polymer coagulant for the one thousandth point 2 five to two of over dry sludge is added to step（4）1., in conditioning tank, 1～5min is stirred to being well mixed with the rotating speed of 30～50r/min；Chemical conditioner and high polymer coagulant is made fully to react with sludge；
（5）Sludge pump work
Start sludge pump to start into mud, with the rising of pressure in sheet frame, the filtrate of sludge is flowed out, enters mudflow amount and progressively decline；When entering mud pressure and reaching 0.9MPa, sludge inputiing mud volume stops into mud close to zero；Filtrate is sampled, sludge specific resistance is determined；
（6）Filter-press dehydration
Typically enter mud and start filter-press dehydration after 60 to 100 minutes：Open sheet frame filter press-type sludge dewatering equipment and start squeezing, the pressure of squeezing is 1MPa/1.5MPa, squeezes 60～150 minutes time；
（7）Dump
Filter-press dehydration opens sheet frame dump after terminating, and extracts mud sample in diverse location by sampling requirement and determines its moisture content and cake thickness；
（8）Reference record
The record of various parameters is carried out in sludge dehydration process；
The parameter of record include raw sewage amount, moisture content, conditioner dosage, the reaction time, enter mud time, time of filter pressing, moisture content of the cake after press filtration；
（9）Equipment cleaning
Sludge conditioning retort should be emptied after one time filter-press dehydration terminates, reduction filter press, to original state, is that next sludge dewatering is ready.
Optionally, the modified form PAMC is the copolymer of acrylamide and acrylate monomer, and its molecular weight is 200～10,000,000, and outward appearance is white fine particle.
Optionally, the highly active vegetable fiber is wooden cloth matrix, is the string constituted based on cellulose family organic waste, and it can change the flocculation structure of sludge, builds mesh skeleton, increases floc strength.
Further, from sludge into from the beginning of sludge conditioning retort, terminate to plate compression dewaterer press filtration operation, then unload filter cake and equipment cleaning terminates, the whole processed cycle is 2～4 hours.
Further, in described step（4）In, the high polymer coagulant can be added in sludge conditioning retort together with the chemical conditioner simultaneously.
Application of the wooden cloth matrix of the highly active vegetable fiber as chemical conditioner in sludge press filtration dehydration.
During the present invention carries out deep dehydration to sludge, the action principle that the high polymer coagulant is applied in combination with the chemical conditioner is as follows.
The polymer coagulant is a kind of cationic organic polymer flocculating agent, and it dissolves in water and ionizes and absorption occurs by the solid particle of hydrogen bond, covalent bond and sludge.Polymer agglomeration agent molecule has backbone, there are many active cation groups on chain, the negative electrical charge on mud granule can be neutralized and be fully extended in water and while cohered multiple mud granules, adsorption bridging effect makes sludge molecule be gathered into larger particles and forms floc sedimentation, is conducive to dehydration.
The chemical conditioner is a kind of highly active vegetable fiber, can change sludge flocculation structure, builds mesh skeleton, increases floc strength.
By the negative electrical charge in a large amount of active cation groups on the polymer coagulant long-chain with mud granule institute band, multiple mud granules are fully extended and are cohered in water, form huge flocculation structure；And the chemical conditioner increases floc strength then as the presence of fiber provides mesh skeleton, suitable filtrate channel is formed, is conducive to deep dehydration.
The good effect of method that the present invention carries out deep dehydration to sludge is：
（1）Deep dehydration is carried out to sludge using combination of the high polymer coagulant with chemical conditioner, can make before and after dehydration that content of organics and sludge calorific value are held essentially constant in sludge, stronger adaptability is kept for the process of follow-up anhydration and incineration, and there are in terms for the treatment of cost and mud decrement economic advantages.
（2）The present invention is the filter-press dehydration that highly active vegetable fiber wooden cloth matrix is applied to sludge first as chemical conditioner, and plate compression dewaterer can be made more preferable to the dehydrating effect of sludge.
（3）The method of the present invention is simple to operate, administers effective；In terms of sludge butt, the total dosage of medicament is less than 12%, so medicament is adding less, far below the dosage of molysite+lime inorganic conditioner 35～45%, reducing sludge volume is obvious, " lime adds ferric trichloride " method can be replaced to carry out dehydration improvement to sludge, the moisture percentage in sewage sludge after deep dehydration can meet the standard less than 60%；Reagent cost and later stage landfill stabilization cost are lower.
（4）Present patent application is produced in the research of " tackling of key scientific and technical problems ", has reached the requirement of research project verification, combination application of the high polymer coagulant with chemical conditioner is had one's own knack, can the popularization and application in the improvement of sludge.
Specific embodiment
The present invention given below carries out the specific embodiment of the method for deep dehydration to sludge, there is provided 6 embodiments.It should be understood that the enforcement of the present invention is not limited to following embodiment.
Embodiment
1
Deep dehydration is carried out by process object of the sludge of Shanghai City Shi Dongkou sewage treatment plant.Shanghai City Shi Dongkou sewage treatment plant is located at Baoshan District length along the river, 400,000 m of sewage collecting amount3/ d, peak sewage quantity 6.018m3/ s, wherein industrial wastewater account for 40%, and sanitary sewage accounts for 60%.Sewage disposal processes denitrification dephosphorization technique using UNI-TANK integration two stage biologicals, and after after process, tail water reaches one-level B discharge standard, using bank, mode enters the Changjiang river under water.
The present embodiment mainly make use of assembling pilot scale plate compression type sludge dewatering equipment（Filter area 10m2；Theoretical chamber space 0.146m3；Filter plate size 800mm × 800mm × 60mm：Squeeze pressure≤14Bar.According to《Urban wastewater treatment firm sludge treatment blended landfill shale》（GBT
23485-2009）Regulation and requirement, the moisture content of dehydrated sludge should be less than 60%.
A kind of method for carrying out deep dehydration to sludge, its step include：
（1）Equipment is checked
Closure sheet frame filter press-type sludge dewatering equipment, the situation for checking equipment and pipeline connection.
（2）Prepare high polymer coagulant and chemical conditioner
1. the preparation of high polymer coagulant
Using modified form PAMC（PAM）Used as high polymer coagulant, the modified form PAMC is the copolymer of acrylamide and acrylate monomer, and its molecular weight is 200～10,000,000, and outward appearance is white fine particle.
Modified form PAMC is dissolved in water in ratio of the modified form PAMC than water=1 ︰ 1000, stirring and dissolving 60 minutes, constitute high polymer coagulant and preserve stand-by.
2. the preparation of chemical conditioner
Using highly active vegetable fiber as chemical conditioner, the highly active vegetable fiber is wooden cloth matrix, is the string constituted based on cellulose family organic waste, and it can change the flocculation structure of sludge, builds mesh skeleton, increases floc strength.Highly active vegetable fiber wooden cloth matrix is infiltrated in water 30 minutes by the ratio using front need in the wooden cloth matrix of highly active vegetable fiber than water=1 ︰ 5, is constituted string chemical conditioner and is preserved stand-by.
（3）Sludge is extracted
By the sludge 1m that moisture content is 97.9%, pH=6.53Extract to sludge conditioning retort, stirred with the rotating speed of 40～60r/min, be well mixed muddy water.
（4）Addition chemical conditioner and high polymer coagulant, dispersion and reaction
1. the addition of chemical conditioner
By step（2）The chemical conditioner 1.68kg of preparation is added to step（3）Conditioning tank in, dispensing stirs 30min to being well mixed with the rotating speed of 50r/min than for 8%.
2. the addition of high polymer coagulant
By step（2）The high polymer coagulant 31.5g of preparation is added to step（4）1., in conditioning tank, dispensing stirs 3min to being well mixed with the rotating speed of 50r/min than for 1.5 ‰；Chemical conditioner and high polymer coagulant is made fully to react with sludge.
（5）Sludge pump work
Start sludge pump to start into mud, enter mud 40
min：With the rising of pressure in sheet frame, the filtrate of sludge is flowed out, enters mudflow amount and progressively decline；When entering mud pressure and reaching 0.9MPa, sludge inputiing mud volume stops into mud close to zero；Filtrate is sampled, sludge specific resistance is determined.
（6）Filter-press dehydration
Typically enter mud and start filter-press dehydration after 60 to 100 minutes：Open sheet frame filter press-type sludge dewatering equipment and start squeezing, the pressure of squeezing is 14kg, stops filter-press dehydration after 105 minutes squeezing time.
（7）Dump and measure
After press filtration terminates, sheet frame dump is opened, and presses sampling requirement and mud sample measure is extracted in diverse location（Detected with moisture percentage in sewage sludge determination method）：
No. 1 position（Positioning cuts maximum pressure point）Moisture content be 50.7%；Cake thickness is 1.9cm.
No. 2 positions（Positioning is cut at 1/2）Moisture content be 52.3%；Cake thickness is 1.9cm.
No. 3 positions（At mud cake Bian Xiang centers 1/2）Moisture content be 62.2%；Cake thickness is 1.9cm.
No. 4 positions（Mud cake is to center）Moisture content be 62.4%；Cake thickness is 1.9cm.
（8）Reference record
The record of various parameters is carried out in sludge dehydration process；The parameter of the record include raw sewage amount, moisture content, conditioner dosage, the reaction time, enter mud time, time of filter pressing, moisture content of the cake after press filtration.
（9）Equipment cleaning
Sludge conditioning retort should be emptied after one time filter-press dehydration terminates, reduction filter press, to original state, is that next sludge dewatering is ready.The whole processed cycle can be controlled in 4～5 hours.
Embodiment
2
Process object is with embodiment 1.
A kind of method for carrying out deep dehydration to sludge, its step include：
（1）Equipment is checked（With embodiment 1）.
（2）Prepare high polymer coagulant and chemical conditioner（With embodiment 1）.
（3）Sludge is extracted
By the sludge 1m that moisture content is 97.7%, pH=6.73Extract to sludge conditioning retort, stirred with the rotating speed of 40～60r/min,It is well mixed muddy water.
（4）Addition chemical conditioner and high polymer coagulant, dispersion and reaction
1. the addition of chemical conditioner
By step（2）The chemical conditioner 3.22kg of preparation is added to step（3）Conditioning tank in, dispensing stirs 30min to being well mixed with the rotating speed of 80r/min than for 14%.
2. the addition of high polymer coagulant
By step（2）The high polymer coagulant 34.5g of preparation is added to step（4）1., in conditioning tank, dispensing makes chemical conditioner and high polymer coagulant fully react with sludge than being 1.5 ‰ with the rotating speed stirring 5min of 30r/min.
（5）Sludge pump work（With embodiment 1）.
（6）Filter-press dehydration（Substantially with embodiment 1）.
60 points of squeezing timeClockAfter stop filter-press dehydration.
（7）Dump and measure
Sheet frame dump is opened in press filtration after terminating, and presses sampling requirement in diverse location extraction mud sample measure（Assay method is with embodiment 1）：
The moisture content of No. 1 position is 49.3%；Cake thickness is 2.1cm.
The moisture content of No. 2 positions is 49.7%；Cake thickness is 2.1cm.
The moisture content of No. 3 positions is 57.8%；Cake thickness is 2.1cm.
The moisture content of No. 4 positions is 59.8%；Cake thickness is 2.1cm.
（8）Reference record（With embodiment 1）.
（9）Equipment cleaning（With embodiment 1）.
Embodiment
3
Process object is with embodiment 1.
A kind of method for carrying out deep dehydration to sludge, its step include：
（1）Equipment is checked（With embodiment 1）.
（2）Prepare high polymer coagulant and chemical conditioner（With embodiment 1）.
（3）Sludge is extracted
By the sludge 1m that moisture content is 97.7%, pH=6.93Extract to sludge conditioning retort, stirred with the rotating speed of 40～60r/min, be well mixed muddy water.
（4）Addition chemical conditioner and high polymer coagulant, dispersion and reaction
1. the addition of chemical conditioner
By step（2）The chemical conditioner 2.76kg of preparation is added to step（3）Conditioning tank in, dispensing stirs 30min to being well mixed with the rotating speed of 40r/min than for 12%.
2. the addition of high polymer coagulant
By step（2）The high polymer coagulant 28.8g of preparation is added to step（4）1., in conditioning tank, dispensing makes chemical conditioner and high polymer coagulant fully react with sludge than being 1.25 ‰ with the rotating speed stirring 1min of 50r/min.
（5）Sludge pump work（With embodiment 1）.
（6）Filter-press dehydration（Substantially with embodiment 1）.
Stop filter-press dehydration after 150 minutes squeezing time.
（7）Dump and measure
Sheet frame dump is opened in press filtration after terminating, and presses sampling requirement in diverse location extraction mud sample measure（Assay method is with embodiment 1）：
The moisture content of No. 1 position is 48.2%；Cake thickness is 1.9cm.
The moisture content of No. 2 positions is 55.6%；Cake thickness is 1.9cm.
The moisture content of No. 3 positions is 59.3%；Cake thickness is 1.9cm.
The moisture content of No. 4 positions is 60.1%；Cake thickness is 1.9cm.
（8）Reference record（With embodiment 1）.
（9）Equipment cleaning（With embodiment 1）.
Embodiment
4
Process object is with embodiment 1.
A kind of method for carrying out deep dehydration to sludge, its step include：
（1）Equipment is checked（With embodiment 1）.
（2）Prepare high polymer coagulant and chemical conditioner（With embodiment 1）.
（3）Sludge is extracted
By the sludge 1m that moisture content is 98.2%, pH=6.83Extract to sludge conditioning retort, stirred with the rotating speed of 40～60r/min, be well mixed muddy water.
（4）Addition chemical conditioner and high polymer coagulant, dispersion and reaction
1. the addition of chemical conditioner
By step（2）The chemical conditioner 2.16kg of preparation is added to step（3）Conditioning tank in, dispensing stirs 30min to being well mixed with the rotating speed of 80r/min than for 12%.
2. the addition of high polymer coagulant
By step（2）The high polymer coagulant 31.5g of preparation is added to step（4）1., in conditioning tank, dispensing makes chemical conditioner and high polymer coagulant fully react with sludge than being 1.75 ‰ with the rotating speed stirring 3min of 40r/min.
（5）Sludge pump work（With embodiment 1）.
（6）Filter-press dehydration（Substantially with embodiment 1）.
Stop filter-press dehydration after 110 minutes squeezing time.
（7）Dump and measure
Sheet frame dump is opened in press filtration after terminating, and presses sampling requirement in diverse location extraction mud sample measure（Assay method is with embodiment 1）：
The moisture content of No. 1 position is 48.5%；Cake thickness is 2cm.
The moisture content of No. 2 positions is 49.7%；Cake thickness is 2cm.
The moisture content of No. 3 positions is 60.2%；Cake thickness is 2cm.
The moisture content of No. 4 positions is 61.3%；Cake thickness is 2cm.
（8）Reference record（With embodiment 1）.
（9）Equipment cleaning（With embodiment 1）.
Embodiment
5
Process object is with embodiment 1.
A kind of method for carrying out deep dehydration to sludge, its step include：
（1）Equipment is checked（With embodiment 1）.
（2）Prepare high polymer coagulant and chemical conditioner（With embodiment 1）.
（3）Sludge is extracted
By the sludge 1m that moisture content is 98.2%, pH=6.93Extract to sludge conditioning retort, stirred with the rotating speed of 40～60r/min, be well mixed muddy water.
（4）Addition chemical conditioner and high polymer coagulant, dispersion and reaction
1. the addition of chemical conditioner
By step（2）The chemical conditioner 2.16kg of preparation is added to step（3）Conditioning tank in, dispensing stirs 30min to being well mixed with the rotating speed of 50r/min than for 12%.
2. the addition of high polymer coagulant
By step（2）The high polymer coagulant 36g of preparation is added to step（4）1., in conditioning tank, dispensing makes chemical conditioner and high polymer coagulant fully react with sludge than being 2.0 ‰ with the rotating speed stirring 5min of 30r/min.
（5）Sludge pump work（With embodiment 1）.
（6）Filter-press dehydration（Substantially with embodiment 1）.
Stop filter-press dehydration after 120 minutes squeezing time.
（7）Dump and measure
Sheet frame dump is opened in press filtration after terminating, and presses sampling requirement in diverse location extraction mud sample measure（Assay method is with embodiment 1）：
The moisture content of No. 1 position is 45.1%；Cake thickness is 1.9cm.
The moisture content of No. 2 positions is 50.9%；Cake thickness is 1.9cm.
The moisture content of No. 3 positions is 60.7%；Cake thickness is 1.9cm.
The moisture content of No. 4 positions is 60.7%；Cake thickness is 1.9cm.
（8）Reference record（With embodiment 1）.
（9）Equipment cleaning（With embodiment 1）.
Embodiment
6
Process object is with embodiment 1.
A kind of method for carrying out deep dehydration to sludge, its step include：
（1）Equipment is checked（With embodiment 1）.
（2）Prepare high polymer coagulant and chemical conditioner（With embodiment 1）.
（3）Sludge is extracted
By the sludge 1m that moisture content is 98.2%, pH=6.33Extract to sludge conditioning retort, stirred with the rotating speed of 40～60r/min, be well mixed muddy water.
（4）Addition chemical conditioner and high polymer coagulant, dispersion and reaction
1. the addition of chemical conditioner
By step（2）The chemical conditioner 1.8kg of preparation is added to step（3）Conditioning tank in, dispensing stirs 30min to being well mixed with the rotating speed of 40r/min than for 12%.
2. the addition of high polymer coagulant
By step（2）The high polymer coagulant 27g of preparation is added to step（4）1., in conditioning tank, dispensing makes chemical conditioner and high polymer coagulant fully react with sludge than being 1.5 ‰ with the rotating speed stirring 2min of 40r/min.
（5）Sludge pump work（With embodiment 1）.
（6）Filter-press dehydration（Substantially with embodiment 1）.
Stop filter-press dehydration after 130 minutes squeezing time.
（7）Dump and measure
Sheet frame dump is opened in press filtration after terminating, and presses sampling requirement in diverse location extraction mud sample measure（Assay method is with embodiment 1）：
The moisture content of No. 1 position is 41.5%；Cake thickness is 1.9cm.
The moisture content of No. 2 positions is 49.7%；Cake thickness is 1.9cm.
The moisture content of No. 3 positions is 59.1%；Cake thickness is 1.9cm.
The moisture content of No. 4 positions is 60.2%；Cake thickness is 1.9cm.
（8）Reference record（With embodiment 1）.
（9）Equipment cleaning（With embodiment 1）.
Can be seen that in the case where process conditions are close from the measurement result of embodiment 1-6, chemical conditioner and high polymer coagulant serve positive effect；Especially embodiment 2, under the dosage of high chemical conditioner and higher high polymer coagulant, five diverse locations extract the measurement of water-content coefficient of samples all below 60%.
The present invention should also be noted that in force：
In summer, the gentle sludge temperature of dilution water is higher, and the mixing speed of chemical conditioner can be adjusted to 100r～150r/min, and mixing time can be adjusted to 30min～50min；The mixing speed of polymer coagulant can be adjusted to 60r～80r/min, and mixing time can be adjusted to 2～6min.
In the fall, the gentle sludge temperature drop of dilution water, while organic matter ratio rises in thickened sludge, is unfavorable for that medicament configuration and stirring mixing, mixing speed and mixing time should be adjusted to：The mixing speed of chemical conditioner is 100r/min；Mixing time is 50min, and the mixing speed of polymer coagulant is 50r/min, and mixing time is 5min.
In the winter time, because temperature is low, medicament configuration effect declines, and opsonic reaction degree is reduced and is unfavorable for sludge dewatering；Again because sludge quality there occurs change：Because amount of rainfall is few, influent concentration rises, and the husky amount carried in sewage declines, and in causing sludge, organic matter ratio rises.Therefore, the dosage of chemical conditioner should should should improve about 2 times than the time of 1.2 times of summer raising, filter-press dehydration than the dosage of 1.5～2 times of summer raising, polymer coagulant.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, on the premise of without departing from component of the present invention and dewatering; some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of method for carrying out deep dehydration to sludge, is dehydrated using plate compression type device for dehydrating sladge waste and using high polymer coagulant and chemical conditioner to sludge, it is characterised in that its step includes：
（1）Equipment is checked
Closure sheet frame filter press-type sludge dewatering equipment, checks the situation of equipment and pipeline connection；
（2）Prepare high polymer coagulant and chemical conditioner
1. the preparation of high polymer coagulant
Using PAMC（PAM）As high polymer coagulant, PAMC is dissolved in water in ratio of the PAMC than water=1 ︰ 1000, stirring and dissolving 60 minutes, constitute high polymer coagulant and preserve stand-by；
2. the preparation of chemical conditioner
Using highly active vegetable fiber as chemical conditioner, as chemical conditioner is a kind of highly active vegetable fiber, highly active vegetable fiber is infiltrated 30 minutes in water by ratio that need to be in highly active vegetable fiber than water=1 ︰ 5, is constituted string chemical conditioner and is preserved stand-by；
（3）Sludge is extracted
Raw sewage is extracted to sludge conditioning retort, is stirred with the rotating speed of 40～60r/min, the moisture content of sludge is then measured by sampling；
（4）Addition chemical conditioner and high polymer coagulant, dispersion and reaction
1. the addition of chemical conditioner
By step（2）The chemical conditioner of preparation is added to step for five to ten five the percent of over dry sludge consumption standard by chemical conditioner（3）Conditioning tank in, 30min is stirred to being well mixed with the rotating speed of 40～80r/min；
2. the addition of high polymer coagulant
By step（2）Consumption standard of the high polymer coagulant of preparation by polymer coagulant for the one thousandth point 2 five to two of over dry sludge is added to step（4）1., in conditioning tank, 1～5min is stirred to being well mixed with the rotating speed of 30～50r/min；Chemical conditioner and high polymer coagulant is made fully to react with sludge；
（5）Sludge pump work
Start sludge pump to start into mud, with the rising of pressure in sheet frame, the filtrate of sludge is flowed out, enters mudflow amount and progressively decline；When entering mud pressure and reaching 0.9MPa, sludge inputiing mud volume stops into mud close to zero；Filtrate is sampled, sludge specific resistance is determined；
（6）Filter-press dehydration
Typically enter mud and start filter-press dehydration after 60 to 100 minutes：Open sheet frame filter press-type sludge dewatering equipment and start squeezing, the pressure of squeezing is 1MPa/1.5MPa, squeezes 60～150 minutes time；
（7）Dump
Filter-press dehydration opens sheet frame dump after terminating, and extracts mud sample in diverse location by sampling requirement and determines its moisture content and cake thickness；
（8）Reference record
The record of various parameters is carried out in sludge dehydration process；
The parameter of record include raw sewage amount, moisture content, conditioner dosage, the reaction time, enter mud time, time of filter pressing, moisture content of the cake after press filtration；
（9）Equipment cleaning
Sludge conditioning retort should be emptied after one time filter-press dehydration terminates, reduction filter press, to original state, is that next sludge dewatering is ready.
2. the method that deep dehydration is carried out to sludge according to claim 1, it is characterised in that described PAMC is the copolymer of acrylamide and acrylate monomer, and its molecular weight is 200～10,000,000, and outward appearance is white fine particle.
3. the method that deep dehydration is carried out to sludge according to claim 1, it is characterised in that the highly active vegetable fiber is wooden cloth matrix, it is the string constituted based on cellulose family organic waste, it can change the flocculation structure of sludge, build mesh skeleton, increase floc strength.
4. the method that deep dehydration is carried out to sludge according to claim 1, characterized in that, from sludge into from the beginning of sludge conditioning retort, terminating to plate compression dewaterer press filtration operation, filter cake being unloaded again and equipment cleaning terminating, the whole processed cycle is 2～4 hours.
5. the method that deep dehydration is carried out to sludge according to claim 1, it is characterised in that in described step（4）In, the high polymer coagulant can be added in sludge conditioning retort together with the chemical conditioner simultaneously.
6. application of the wooden cloth matrix of highly active vegetable fiber described in claim 3 as chemical conditioner in sludge press filtration dehydration.
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| CN109179965A (en) * | 2018-11-01 | 2019-01-11 | 中国农业大学 | It is a kind of for compound conditioned dose of sludge high-efficiency dehydration and mud dewatering method |
| CN109264963A (en) * | 2018-07-17 | 2019-01-25 | 北京环球中科水务科技有限公司 | A kind of portable sludge dewatering treatment pilot plant test case and pilot plant test method |
| CN112110629A (en) * | 2020-09-04 | 2020-12-22 | 吴植仁 | Sludge filter pressing method using sludge carbon as filter aid |
| CN113415968A (en) * | 2021-06-03 | 2021-09-21 | 长沙工研院环保有限公司 | Sludge recycling treatment method |
| CN113443812A (en) * | 2021-08-03 | 2021-09-28 | 江南大学 | Method for quickly adjusting flocculation condition and filter-pressing dehydration process of blue algae mud |
| CN113874093A (en) * | 2019-05-31 | 2021-12-31 | 迪睿合株式会社 | Water treatment agent, method for producing same, and water treatment method |
| CN114804570A (en) * | 2022-04-29 | 2022-07-29 | 上海同臣环保有限公司 | Chemical conditioning deep dehydration method for sludge |
| CN115959814A (en) * | 2022-09-13 | 2023-04-14 | 佛山经纬纳科环境科技有限公司 | Organic sludge conditioner for improving mechanical property of mud cake and sludge dewatering method |
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| CN109264963A (en) * | 2018-07-17 | 2019-01-25 | 北京环球中科水务科技有限公司 | A kind of portable sludge dewatering treatment pilot plant test case and pilot plant test method |
| CN109264963B (en) * | 2018-07-17 | 2024-01-26 | 北京环球中科水务科技有限公司 | Portable sludge dewatering treatment pilot-scale experiment box and pilot-scale experiment method |
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| CN109179965A (en) * | 2018-11-01 | 2019-01-11 | 中国农业大学 | It is a kind of for compound conditioned dose of sludge high-efficiency dehydration and mud dewatering method |
| CN113874093A (en) * | 2019-05-31 | 2021-12-31 | 迪睿合株式会社 | Water treatment agent, method for producing same, and water treatment method |
| CN112110629A (en) * | 2020-09-04 | 2020-12-22 | 吴植仁 | Sludge filter pressing method using sludge carbon as filter aid |
| CN113415968B (en) * | 2021-06-03 | 2023-09-12 | 长沙工研院环保有限公司 | Sludge recycling treatment method |
| CN113415968A (en) * | 2021-06-03 | 2021-09-21 | 长沙工研院环保有限公司 | Sludge recycling treatment method |
| CN113443812A (en) * | 2021-08-03 | 2021-09-28 | 江南大学 | Method for quickly adjusting flocculation condition and filter-pressing dehydration process of blue algae mud |
| CN113443812B (en) * | 2021-08-03 | 2022-07-22 | 江南大学 | Method for quickly adjusting flocculation condition and filter-pressing dehydration process of blue algae mud |
| CN114804570A (en) * | 2022-04-29 | 2022-07-29 | 上海同臣环保有限公司 | Chemical conditioning deep dehydration method for sludge |
| CN114804570B (en) * | 2022-04-29 | 2023-12-12 | 上海同臣环保有限公司 | Deep dehydration method for chemical conditioning of sludge |
| CN115959814A (en) * | 2022-09-13 | 2023-04-14 | 佛山经纬纳科环境科技有限公司 | Organic sludge conditioner for improving mechanical property of mud cake and sludge dewatering method |
| CN115959814B (en) * | 2022-09-13 | 2024-03-19 | 佛山经纬纳科环境科技有限公司 | Organic sludge conditioner for improving mechanical properties of mud cakes and sludge dewatering method |
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