CN103466915A - Composition for deep dehydration of municipal sludge and dehydration method thereof - Google Patents
Composition for deep dehydration of municipal sludge and dehydration method thereof Download PDFInfo
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- CN103466915A CN103466915A CN2013104017219A CN201310401721A CN103466915A CN 103466915 A CN103466915 A CN 103466915A CN 2013104017219 A CN2013104017219 A CN 2013104017219A CN 201310401721 A CN201310401721 A CN 201310401721A CN 103466915 A CN103466915 A CN 103466915A
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- 239000000203 mixture Substances 0.000 title claims abstract description 81
- 230000018044 dehydration Effects 0.000 title claims abstract description 57
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 57
- 239000010802 sludge Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000003750 conditioning effect Effects 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 150000003839 salts Chemical class 0.000 claims abstract description 16
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 14
- 239000011707 mineral Substances 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 239000002253 acid Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000005416 organic matter Substances 0.000 claims abstract description 6
- 239000003513 alkali Substances 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 44
- 239000003292 glue Substances 0.000 claims description 9
- 239000010801 sewage sludge Substances 0.000 claims description 7
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 3
- 229910001853 inorganic hydroxide Inorganic materials 0.000 claims description 2
- 150000007524 organic acids Chemical class 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 238000003828 vacuum filtration Methods 0.000 claims description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims 1
- 235000011130 ammonium sulphate Nutrition 0.000 claims 1
- ZNRSXPDDVNZGEN-UHFFFAOYSA-K trisodium;chloride;sulfate Chemical compound [Na+].[Na+].[Na+].[Cl-].[O-]S([O-])(=O)=O ZNRSXPDDVNZGEN-UHFFFAOYSA-K 0.000 claims 1
- 239000000706 filtrate Substances 0.000 abstract description 11
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000012024 dehydrating agents Substances 0.000 abstract 2
- 239000000499 gel Substances 0.000 description 21
- 235000010755 mineral Nutrition 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000004064 recycling Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000012065 filter cake Substances 0.000 description 4
- 239000013505 freshwater Substances 0.000 description 4
- 239000006194 liquid suspension Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 3
- VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical compound [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000001632 sodium acetate Substances 0.000 description 3
- 235000017281 sodium acetate Nutrition 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 2
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- LBPACUJFGRCWDF-UHFFFAOYSA-L Cl[Mg]Cl.[Na] Chemical compound Cl[Mg]Cl.[Na] LBPACUJFGRCWDF-UHFFFAOYSA-L 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a composition for deep dehydration of municipal sludge. One part by mass of the composition comprises 0.04-0.10 part by mass of component 1, 0.04-0.06 part by mass of component 2 and 0.84-0.92 part by mass of component 3, wherein the component 1 contains a pH regulator, the component 2 contains a gel breaker, the component 3 contains a dehydrating agent, the pH regulator is an acid or alkali, the gel breaker is a polar organic matter, and the dehydrating agent is a mineral salt. When the composition used for deeply dehydrating municipal sludge, wet sludge is taken firstly, 0.5-3 parts by mass of the composition is added to 1 part by mass of wet sludge under normal pressure at 10-50 DEG C to be subjected to mixing and gel breaking conditioning; during the conditioning process, mechanical mixing is carried out and then solid-liquid separation is carried out till the water content of wet sludge is lowered to 50-30%. The composition has the advantages of no pollution, no reduction of organic content in the sludge, low energy consumption, reusable filtrate, low cost and the like.
Description
Technical field
The invention belongs to environmental protection technical field, relate in particular to a kind of composition for deeply dehydrating sludge and dewatering.
Background technology
China's town sewage plant generally adopts mechanical system to be dewatered to mud, and the dewatered sludge water ratio, generally 77%～83%, is the pseudo-gels state, is referred to as " wet mud ".Wet moisture percentage in sewage sludge is high, and organic content is high, and heavy metal content is higher, and germ, parasite (ovum) content are high.If wet mud, without minimizing and harmless treatment, is thrown aside arbitrarily, simple landfill, easy polluted air, soil and water source, serious threat HUMAN HEALTH and environmental safety.So the wet mud of sewage work must carry out minimizing, innoxious, stabilization, recycling treatment and disposal.
Solve the wet & Mud problem of sewage work, at first the technical bottleneck of the low-cost deep dehydration of the wet mud of Gonna breakthrough, be down to its water ratio below 60% by 80% left and right, realizes minimizing, otherwise be difficult to realize recycling.
The CN102408178A Chinese patent literature discloses a kind of method of deeply dehydrating sludge, comprising: a. is by acid for adjusting pH value to 2.5 for thickened sludge～3.5; B. add molysite, add H
2o
2or rapid stirring after Peracetic Acid; C. add framework material, the sludge pH value is adjusted to 6.8～7.2; D. sludge dewatering.The content of this technical scheme mainly contains 3 points: add chemical reagent after adjust pH, add framework material, recall to the rear mechanical dehydration of pH value; Its shortcoming is to consume soda acid, chemical reagent, needs again to add the inorganics framework material, has reduced the mud organic content, also needs to carry out mechanical dehydration.The CN102432153A Chinese patent literature discloses a kind of preparation method of magnetic deep sludge dehydration composite modifier, and it is with nano-magnetic Fe
3o
4, anionic polyacrylamide (PAM) and dimethyl diallyl ammonium chloride (DADMAC) be raw material, prepared a kind of properties-correcting agent of the magnetic sludge for deeply dehydrating sludge.After this properties-correcting agent dehydration, can recycle, just the sludge dewatering effect is limited, and the sludge dewatering cost is high.The CN102795755A Chinese patent literature discloses a kind of " deep dehydration system for sludge and deep dehydration method for sludge ", and it carries out modifier treatment by adding flocculation agent to mud, then carries out the mechanical dehydration processing.The CN102358679A Chinese patent literature discloses a kind of sludge conditioner and has used this amendment mud to be carried out to the method for deep dehydration, it is to cook sludge conditioner by solid waste, and the Wingdale that the magnesia that this sludge conditioner is 40%～70% by weight percent and weight percent are 30%～60% is made after pulverizing after 900 ℃～1000 ℃ calcination 1h～2h; Use the deep dehydration method of this sludge conditioner can make below moisture percentage in sewage sludge fast reducing to 60%, but shortcoming is the content that has significantly reduced the mud organic matter.The CN103073170A Chinese patent literature discloses a kind of deep dehydration method for sludge based on the magnetic super strength water absorbent, and it adopts brokenly glue conditioning mud to be combined and to carry out deep dehydration with the colloid dewatering agent.
All in all, around deeply dehydrating sludge, the published patent documentation of China has to be described and relates to, itself or adopt high-pressure machinery power and heating power to carry out forced dehydration, energy consumption is high, effect is undesirable; Perhaps adopt chemical agent, flocculation agent to carry out modified, then carry out the mechanical forced dehydration, chemical agent can not the recirculation utilization; Perhaps add a large amount of framework material inorganicss, reduced organic content in mud, its recycling is worth and has a greatly reduced quality.Existing deep dehydration method for sludge need further Improvement and perfection.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, a kind of pollution-free, not organic content in reduce mud, energy consumption is low, filtered liquid is reusable, cost the is low composition for the municipal sludge deep dehydration are provided, a kind of simple to operate, practical, the dewatering that can realize the mud fast dewatering also is provided.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is a kind of composition for the municipal sludge deep dehydration, the component that described composition comprises following mass fraction:
Component 1:0.04～0.10 mass parts,
Component 2:0.04～0.06 mass parts, and
Component 3:0.84～0.92 mass parts;
Said components 1, component 2 and component 3 amount to 1 mass parts; Wherein: component 1 comprises the pH value conditioning agent that concentration is 5.0wt%～20wt%, and component 2 comprises the gel breaker that concentration is 0.5wt%～3.0wt%, and it is 10wt%～20wt% dewatering agent that component 3 comprises concentration;
Described pH value conditioning agent is mainly acid or alkali; Described gel breaker is mainly polar organic matter, and described dewatering agent is mainly mineral salt.
The above-mentioned composition for the municipal sludge deep dehydration, the effect of described component 1 is mainly the charged character of conditioning of mud colloidal solid, reduce intergranular repulsive force, the concentration of its pH value conditioning agent in component 1 is preferably adjusted in 10wt%～15wt% scope, and proportion optimization 0.06～0.09 mass parts of component 1 in composition.Acid mainly refers to sulfuric acid, hydrochloric acid or phosphoric acid, also available low molecular weight organic acid; Described alkali is preferably used inorganic hydroxide, as white lime, caustic soda etc.Concrete, those skilled in the art can determine according to mud source and character the concrete composition of pH value conditioning agent.
The above-mentioned composition for the municipal sludge deep dehydration, described component 2 is one of wet mud " pseudo-gels " structural damage persons, the concentration of gel breaker in component 2 is preferably adjusted in 1wt%～2wt% scope.Described polar organic matter is preferably C
2-C
12organic acid salt, particularly preferably as sodium acetate, lime acetate etc.
The above-mentioned composition for the municipal sludge deep dehydration, preferably, the consumption of described component 3 take by the flow of water of composition be adjusted to lower than-3MPa(preferably-3.0MPa～-3.5MPa) be control criterion (liquid or the material flow of water can adopt the measurement of WP4 flow of water survey meter), in order to make mud contained humidity deep dehydration in low flow of water field, reach desired water content requirement.Mineral salt is preferably one or both the mixture in calcium chloride, sodium-chlor, magnesium chloride etc.
As a total technical conceive, the present invention also provides the above-mentioned composition of a kind of use municipal sludge to be carried out to the method for deep dehydration, comprise the following steps: get wet mud 1 mass parts, under 10 ℃～50 ℃ temperature and normal pressure, add described composition 0.5～3 mass parts to be mixed brokenly the glue conditioning, in the conditioning process, wet mud and composition being carried out to machinery mixes mixed, and then carry out (mechanical type) solid-liquid separation, until wet moisture percentage in sewage sludge is down to 50%～30%(moisture percentage in sewage sludge, can measure with the sludge water content analyser), complete processed.
In the technical scheme of the invention described above, the material mixed in broken glue conditioning comprises wet mud and the above-mentioned water displacement composition of the present invention, the purpose of the broken glue conditioning of this mixing is to destroy mud pseudo-gels structure, the character of the wet mud of improvement, discharge most of mud pseudo-gels interstitial water, make its follow-up mechanical solid-liquid separate to become and easily carry out, and then reach the purpose to wet reducing sludge volume, minimizing.
In above-mentioned method, preferably, the task that described mechanical solid-liquid is separated is mainly to carry out effective solid-liquid separation by mixing the suspended mixture obtained after broken glue conditioning, produces semi-dry sludge and dehydration diluted liquid, is preferably isolated by vacuum filtration method, press filtration partition method or centrifugal separation.
In above-mentioned method, preferably, contain " three doses " (being pH value conditioning agent, gel breaker and dewatering agent) material in dehydration diluted liquid after mechanical solid-liquid is separated, can again be recycled as described composition after supplementing pH value conditioning agent, gel breaker and/or dewatering agent.Semi-dry sludge after mechanical solid-liquid is separated can be for compost, do the stopping composition of low calorie fuels, soil improvement agent, matrix material etc.The liquid obtained through mechanical solid-liquid separation unit is dilution dehydration work piece, and it can again become again the dehydration work piece that meets the deep dehydration requirement after adding a certain amount of " three doses ", and recycle reaches the purpose that economizes on resources, reduces processing cost.
In above-mentioned method, the wet moisture percentage in sewage sludge before the broken glue conditioning of described mixing is 75%～83%, generally refers to the product after the mechanical means dehydration by sewage work, belongs to and is specially adapted to the object that the inventive method is carried out deep dehydration.
Compared with prior art, the invention has the advantages that: the present invention adopts two cell process of " mixing broken glue conditioning---mechanical solid-liquid separation " to implement continuously stage by stage, and the homemade water displacement composition dehydrating effect of the present invention is good, reusable edible.In addition, method of the present invention does not comprise the steps such as high pressure dehydration and heating power dehydration, its water ratio can be down to 50%～30%.In general, water displacement composition of the present invention and dewatering do not increase or adopt chemical nuisance, organic content in can reduce mud, the composition reusable edible of dehydration use, can in than less energy-consumption, utmost point reduction process cost situation, make mud carry out deep dehydration, reach sludge reduction and follow-up purpose of carrying out utilization of waste material.
Embodiment
Below in conjunction with the concrete preferred embodiment of specification sheets, the invention will be further described, but protection domain not thereby limiting the invention.
embodiment 1:
A kind of composition for the municipal sludge deep dehydration of the present invention, the component that said composition comprises following mass fraction:
Component 1:0.04 mass parts,
Component 2:0.04 mass parts, and
Component 3:0.92 mass parts;
Amount to 1 mass parts; Wherein: component 1 comprises the pH value conditioning agent that concentration is 5.0wt%; Component 2 comprises the gel breaker that concentration is 3.0wt%; It is 10wt%～20wt% dewatering agent (mineral salt of take is control criterion by be adjusted to-3.0MPa of the flow of water of composition) that component 3 comprises concentration;
PH value conditioning agent is mainly hydrochloric acid; Gel breaker is lime acetate, and mineral salt is mainly calcium chloride, adjusts the reach-3.0MPa of the flow of water of above-mentioned composition with calcium chloride.
The composition above-mentioned with the present embodiment carries out the method for deep dehydration to municipal sludge, comprise the following steps: 1 part, wet mud getting water ratio 80%, add 1.5 parts of the above-mentioned compositions of the present embodiment, under 25 ℃ of temperature and normal pressure, machinery is mixed mixed 6min～10min, obtains the solid-liquid suspension mixture; Suspended mixture is imported to vacuum filter, be-0.05 in negative pressure～-filtered in the 0.09MPa scope, collect respectively filter cake (being semi-dry sludge) and filtrate (dehydration diluted liquid); Filter cake moisture content approximately 50%.
Get the filtrate of filtrate total amount 60%, supplement and add above-mentioned " three doses " (pH value conditioning agent, gel breaker and dewatering agent), make the content of " three doses " reach the formula requirement in above-mentioned composition, form fresh water displacement composition and enter the next one and loop recycling.
embodiment 2:
A kind of composition for the municipal sludge deep dehydration of the present invention, the component that said composition comprises following mass fraction:
Component 1:0.10 mass parts,
Component 2:0.06 mass parts, and
Component 3:0.84 mass parts;
Totally 1 mass parts; Wherein: component 1 comprises the pH value conditioning agent that concentration is 20wt%; Component 2 comprises the gel breaker that concentration is 0.5wt%; It is 10wt%～20wt% dewatering agent (mineral salt of take is control criterion by be adjusted to-3.5MPa of the flow of water of composition) that component 3 comprises concentration;
PH value conditioning agent is mainly sulfuric acid; Gel breaker is mainly sodium acetate, and mineral salt is mainly sodium-chlor, adjusts the reach-3.5MPa of the flow of water of above-mentioned composition with sodium-chlor.
The composition above-mentioned with the present embodiment carries out the method for deep dehydration to municipal sludge, comprise the following steps: 1 part, wet mud getting water ratio 82%, add 3.0 parts of the above-mentioned compositions of the present embodiment, under 35 ℃ of temperature and normal pressure, machinery is mixed mixed 1min, obtains the solid-liquid suspension mixture; Suspended mixture is imported in plate-and-frame filter press, in pressure is 5MPa～10MPa scope, carry out press filtration, collect respectively filter cake (being semi-dry sludge) and filtrate (dehydration diluted liquid); Filter cake moisture content approximately 30%.
Get the filtrate of filtrate total amount 65%, supplement and add above-mentioned " three doses " (pH value conditioning agent, gel breaker and dewatering agent), make the content of " three doses " reach the formula requirement in above-mentioned composition, form fresh water displacement composition and enter the next one and loop recycling.
embodiment 3:
A kind of composition for the municipal sludge deep dehydration of the present invention, the component that said composition comprises following mass fraction:
Component 1:0.08 mass parts,
Component 2:0.05 mass parts, and
Component 3:0.87 mass parts;
Component 1, component 2 and component 3 amount to 1 mass parts; Wherein: component 1 comprises the pH value conditioning agent that concentration is 10wt%; Component 2 comprises the gel breaker that concentration is 2.0wt%; It is 10wt%～20wt% dewatering agent (mineral salt of take is control criterion by be adjusted to-3.2MPa of the flow of water of composition) that component 3 comprises concentration;
PH value conditioning agent is formulated by phosphoric acid; Gel breaker is mainly lime acetate, and mineral salt is mainly magnesium chloride, adjusts the reach-3.2MPa of the flow of water of above-mentioned composition with magnesium chloride.
The composition above-mentioned with the present embodiment carries out the method for deep dehydration to municipal sludge, comprise the following steps: 1 part, wet mud getting water ratio 77%, add 1 part of the above-mentioned composition of the present embodiment, under 10 ℃ of temperature and normal pressure, machinery is mixed mixed 20min, obtains the solid-liquid suspension mixture; Suspended mixture is imported in whizzer, in 3000r/min～4000r/min scope, carry out the centrifugal solid-liquid separation, collect respectively solid slag (being semi-dry sludge) and clear liquid (dehydration diluted liquid); Solid slag water ratio approximately 40%.
Get the filtrate of filtrate total amount 65%, supplement and add above-mentioned " three doses " (pH value conditioning agent, gel breaker and dewatering agent), make the content of " three doses " reach the formula requirement in above-mentioned composition, form fresh water displacement composition and enter the next one and loop recycling.
embodiment 4:
A kind of composition for the municipal sludge deep dehydration of the present invention, the component that said composition comprises following mass fraction:
Component 1:0.10 mass parts,
Component 2:0.04 mass parts, and
Component 3:0.86 mass parts;
Component 1, component 2 and component 3 amount to 1 mass parts; Wherein: component 1 comprises the pH value conditioning agent that concentration is 15.0wt%; Component 2 comprises the gel breaker that concentration is 2.5wt%; It is 10wt%～20wt% dewatering agent (mineral salt of take is control criterion by be adjusted to-3.0MPa of the flow of water of composition) that component 3 comprises concentration;
PH value conditioning agent is mainly sodium hydroxide; Gel breaker is mainly sodium acetate, and mineral salt is mainly calcium chloride, adjusts the reach-3.0MPa of the flow of water of above-mentioned composition with calcium chloride.
The composition above-mentioned with the present embodiment carries out the method for deep dehydration to municipal sludge, comprise the following steps: 1 part, wet mud getting water ratio 80%, add 1.2 parts of the above-mentioned compositions of the present embodiment, under 25 ℃ of temperature and normal pressure, machinery is mixed mixed 10min, obtains the solid-liquid suspension mixture; Suspended mixture is imported in whizzer, in 3000r/min～4000r/min scope, carry out the centrifugal solid-liquid separation, collect respectively solid slag (being semi-dry sludge) and clear liquid (dehydration diluted liquid); Solid slag water ratio approximately 45%.
Get the filtrate of filtrate total amount 65%, supplement and add above-mentioned " three doses " (pH value conditioning agent, gel breaker and dewatering agent), make the content of " three doses " reach the formula requirement in above-mentioned composition, form fresh water displacement composition and enter the next one and loop recycling.
Claims (9)
1. the composition for the municipal sludge deep dehydration, is characterized in that, the component that described composition comprises following mass fraction:
Component 1:0.04～0.10 mass parts,
Component 2:0.04～0.06 mass parts, and
Component 3:0.84～0.92 mass parts;
Said components 1, component 2 and component 3 amount to 1 mass parts; Wherein: the pH value conditioning agent that to comprise concentration in component 1 be 5.0wt%～20wt%, comprise the gel breaker that concentration is 0.5wt%～3.0wt% in component 2, it is 10wt%～20wt% dewatering agent that component 3 comprises concentration;
Described pH value conditioning agent is mainly acid or alkali; Described gel breaker is mainly polar organic matter, and described dewatering agent is mainly mineral salt.
2. the composition for the municipal sludge deep dehydration according to claim 1, is characterized in that, described acid is sulfuric acid, hydrochloric acid, phosphoric acid or low molecular weight organic acid, and described alkali is inorganic hydroxide; The concentration of described pH value conditioning agent in component 1 is 10wt%～15wt%, and the proportioning of component 1 in composition is 0.06～0.09 mass parts.
3. the composition for the municipal sludge deep dehydration according to claim 1 and 2, is characterized in that, described polar organic matter is C
2-C
12organic acid salt; The concentration of described gel breaker in component 2 is 1wt%～2wt%.
4. the composition for the municipal sludge deep dehydration according to claim 1 and 2, is characterized in that, the consumption of described dewatering agent take mineral salt by the flow of water of composition be adjusted to lower than-3MPa is control criterion.
5. the composition for the municipal sludge deep dehydration according to claim 4, is characterized in that, described mineral salt is one or both the mixture in calcium chloride, magnesium chloride, sodium-chlor, sodium sulfate, ammonium sulfate.
6. one kind is carried out the method for deep dehydration with the described composition of any one in claim 1～5 to municipal sludge, comprise the following steps: get wet mud 1 mass parts, under 10 ℃～50 ℃ temperature and normal pressure, add described composition 0.5～3 mass parts to be mixed brokenly the glue conditioning, in the conditioning process, wet mud and composition being carried out to machinery mixes mixed, and then carry out solid-liquid separation, until wet moisture percentage in sewage sludge is down to 50%～30%, completes deep dehydration and process.
7. method according to claim 6, is characterized in that: through the dehydration diluted liquid after mechanical solid-liquid is separated, after supplementing pH value conditioning agent, gel breaker and/or dewatering agent, again as described composition, recycled.
8. method according to claim 6 is characterized in that: the wet moisture percentage in sewage sludge before the broken glue conditioning of described mixing is 75%～83%.
9. according to claim 6,7 or 8 described methods, it is characterized in that: described solid-liquid separation is isolated by vacuum filtration method, press filtration partition method or centrifugal separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310401721.9A CN103466915B (en) | 2013-09-06 | 2013-09-06 | For composition and the dewatering of municipal sludge deep dehydration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310401721.9A CN103466915B (en) | 2013-09-06 | 2013-09-06 | For composition and the dewatering of municipal sludge deep dehydration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103466915A true CN103466915A (en) | 2013-12-25 |
| CN103466915B CN103466915B (en) | 2016-01-20 |
Family
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106830621A (en) * | 2017-02-27 | 2017-06-13 | 河海大学 | A kind of composite sludge dehydration agent and its preparation method and application |
| CN110156300A (en) * | 2019-05-29 | 2019-08-23 | 中清深利(深圳)科技有限公司 | A kind of urban river sediment dehydrating and curing and resource utilization method |
| CN110590121A (en) * | 2019-08-30 | 2019-12-20 | 中山大学 | Sludge dehydrating agent and sludge dehydrating method |
| CN115959809A (en) * | 2022-12-28 | 2023-04-14 | 浙江筑微科技有限公司 | Multifunctional sludge treatment experiment and detection method |
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| JPH07308700A (en) * | 1994-05-19 | 1995-11-28 | Nippon Kayaku Co Ltd | Flocculant and method for dehydrating sludge |
| CN1621369A (en) * | 2003-11-24 | 2005-06-01 | 曾智勇 | Nano highly effective amendment for sludge dehydration |
| CN101580336A (en) * | 2009-05-27 | 2009-11-18 | 中国石油天然气股份有限公司 | Method for treating oil-containing and methanol-containing sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS551831A (en) * | 1978-06-19 | 1980-01-09 | Kirin Brewery Co Ltd | Excess sludge treating method |
| JPH07308700A (en) * | 1994-05-19 | 1995-11-28 | Nippon Kayaku Co Ltd | Flocculant and method for dehydrating sludge |
| CN1621369A (en) * | 2003-11-24 | 2005-06-01 | 曾智勇 | Nano highly effective amendment for sludge dehydration |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106830621A (en) * | 2017-02-27 | 2017-06-13 | 河海大学 | A kind of composite sludge dehydration agent and its preparation method and application |
| CN110156300A (en) * | 2019-05-29 | 2019-08-23 | 中清深利(深圳)科技有限公司 | A kind of urban river sediment dehydrating and curing and resource utilization method |
| CN110590121A (en) * | 2019-08-30 | 2019-12-20 | 中山大学 | Sludge dehydrating agent and sludge dehydrating method |
| CN115959809A (en) * | 2022-12-28 | 2023-04-14 | 浙江筑微科技有限公司 | Multifunctional sludge treatment experiment and detection method |
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| CN103466915B (en) | 2016-01-20 |
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