CN105314815A - Sludge dewatering conditioning agent and dewatering method thereof - Google Patents
Sludge dewatering conditioning agent and dewatering method thereof Download PDFInfo
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- CN105314815A CN105314815A CN201410235276.8A CN201410235276A CN105314815A CN 105314815 A CN105314815 A CN 105314815A CN 201410235276 A CN201410235276 A CN 201410235276A CN 105314815 A CN105314815 A CN 105314815A
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Abstract
The present invention discloses a sludge dewatering conditioning agent, which comprises, by weight, 30-70% of desulfurization ash, 5-15% of a magnesium salt, 5-30% of an iron salt, 2-20% of an aluminum salt, and 0.1-15% of magnesium oxide. The invention further provides a dewatering method of the conditioning agent, wherein the dewatering method comprises conditioning agent solution preparing, sludge conditioning, flocculant solution preparing, sludge dewatering and other steps. According to the present invention, the characteristics of wide used raw material source, and low raw material price, low preparation cost and good dewatering effect are provided, the method can be performed through the existing sludge dewatering facility, the implementation process is simple, the stability and the reliability of the sludge dewatering process can be effectively improved, and the sludge dewatering conditioning agent and the dewatering method can be widely used for treatments of various wastewater, sewage and sludge.
Description
Technical field
The invention belongs to technical field of sludge treatment, particularly relate to the agent of a kind of compound type sludge dehydrating and conditioning, also relate to the application of this amendment and the method for sludge dewatering.
Background technology
Sludge dewatering be in sewage disposal costly, one of extremely crucial again process, directly have influence on the expense of the agricultural or incineration disposal of moisture percentage in sewage sludge, sludge yield and subsequent transportation, sanitary landfill, compost.Moisture existence form in mud roughly has interstitial water or free-water (accounting for 65 ~ 85% of sludge water content), capillary water (accounting for 15 ~ 20% of sludge water content), planar water (<10%), Bound moisture (<10%) etc. four kinds.
Usually, from the moisture percentage in sewage sludge of second pond all more than 98%, for improving dewatering performance of sludge, improving mechanical dehydration effect, often need be changed the physico-chemical property of mud by conditioning, reducing the avidity of colloidal solid and water, for solid-liquid separation creates conditions.Sludge conditioning mainly comprises chemical conditioning, the temperature difference is modified and microbial flocculation is modified.Wherein, chemical conditioning is that application is maximum, its ultimate principle is by adding the amendment that can play electrical counteract or adsorption bridging effect in mud, as coagulating agent, flocculation agent, coagulant aids etc., destroy the stability of mud colloidal solid, make mutually to assemble between the small-particle of dispersion to form macrobead, thus improve the dehydration property of mud, the filtration promoting mud and dehydration process, reach the object reducing moisture percentage in sewage sludge.
At present, sludge dehydration conditioner is divided into two classes: a class is inorganic flocculating agent, mainly comprise molysite, aluminium salt and polymerize aluminum chloride, another kind of is organic polymer coargulator, comprise non-ionic type, cationic, the organic polymer medicament such as anionic and amphoteric, the most common with polyacrylamide (PAM).Improve in the amendment of dewatering performance of sludge various, inorganic flocculating agent exist consumption many, the problems such as A1, Fe ionic concn can be increased; Organic floculant exist use cost high, block filter cloth filter opening, the monomers such as the vinylformic acid produced in dehydration and organic amine may cause water surrounding secondary pollution problems.
Therefore, positive active research develops efficient, safety, low cost sludge dehydration conditioner both at home and abroad.The high efficiency composition dehydrating and conditioning agent organic polymer content of CN1621371A exploitation is high, and cost is higher, follow-up sludge cake recycling difficulty; CN1986788A is with molysite, calcium salt or calcium oxide for chemical amendment, and take substep dosing method, complex process, dehydrated sludge water ratio is still more than 59%, and effect is general; A kind of sludge dewatering high-effective composite filter aid disclosed in CN101182095A, form up to 9 kinds, complicated process of preparation, is difficult to large-scale application; CN101289268A discloses a kind of method of dehydrating activated sludge by waste alkaline residue/alkali liquor, dewatered sludge stability is higher, also can realize the recycling of discarded alkali slag simultaneously, but its main drawback to be mud increase-volume comparatively large, the following resourceization of mud utilizes more difficult; CN101397181A adopts flyash and unslaked lime as inorganic composite conditioner, because flyash addition is comparatively large, also there is the problem that sludge cake increase-volume is larger, and high-quality flyash source is also subject to a definite limitation; The ionic dispersants that sludge dehydrating agent disclosed in CN101100345A uses is up to 5 kinds, and filtrate can cause secondary pollution; CN101693593A nurses one's health the mud cake that mode produces, and organic content does the mud cake organic content height about 10% of Assistant than molysite and calcium oxide, is unfavorable for the follow-up disposal options such as landfill.
The published patent of comprehensive analysis, find that various sludge dehydration conditioner exists following shortcoming with not enough when Synthesis and applications: (1) amendment add-on is larger, after sludge dewatering, mud cake increase-volume is comparatively large, is unfavorable for follow-up recycling or safe disposal; (2) sludge conditioning technique is comparatively complicated, is not suitable for extensive sludge conditioning dehydration application; (3) sludge conditioning technology investment and working cost higher, economy is poor.
On the other hand, along with the raising of environmental requirement, the enterprises such as coal-burning power plant, Steel Plant, nonferrous smelting start to put into operation increasing dry method/semi-dry flue gas desulfurization device, and incident is the desulphurize fly ash grown with each passing day.Dry method/semidry method desulphurization ash (being called for short desulphurize fly ash afterwards) outer appearnce is like cement, for grayish powder, alkalescence high (pH>12), particle diameter superfine (particle of 80% is less than 40 μm), the light (bulk density 0.85 ~ 1.0t/m of density
3, true density 2.25 ~ 2.69t/m
3), moisture low (0.02% ~ 0.36wt%), the easy airborne dust of air storage, main component is CaSO
42H
2o, CaSO
31/2H
2o, CaCO
3, f-CaO (free calcium oxide), Ca (OH)
2, SiO
2, MgO.Because its chemical component fluctuation is large, unstable constituents content is high, high temperature easily decomposes, normal temperature is oxidizable, transport easy airborne dust, prepare building materials easily bursts, and therefore utilizes difficulty very large.
In recent years around production Si-Ca brick, haydite, concrete segment, mineral wool, artificial gravel, in soil stabilization and improvement, structure filling, stable road bed, Mine System and etc. aspect done some and attempted, but cement comsumption is limited, investment is large, major part is in the development experiments stage, does not have promotional value.At present, desulphurize fly ash not yet finds appropriate mass-producing utilization ways, and most desulphurize fly ash is stored up to be abandoned, and fine day airborne dust is boundless, and rainy day sewage crossing current, has become the secondary pollution of smoke gas treatment process, brought serious puzzlement to relevant enterprise.In conjunction with the feature of desulphurize fly ash, seek one efficient convenient, the appropriate desulphurize fly ash of safety is dissolved approach, has been extremely urgent task.
Analyze the character of desulphurize fly ash, it has the character such as alkalescence is high, particle is thin, specific surface area is large, high adsorption capacity, calcium base element content are high, there is the primary condition as sludge dewatering adjusting material, and according to investigation, there is no both at home and abroad and desulphurize fly ash is expanded to the report as sludge dewatering adjusting material.
The present invention prepares burden as sludge dehydration conditioner based on using desulphurize fly ash just, and rely on existing dewatering technology of mud and device, and proposes and apply.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is to provide the agent of a kind of compound type sludge dehydrating and conditioning, and another technical problem that the present invention will solve is to provide the dewatering of this amendment.
Technical scheme of the present invention is, a kind of sludge dehydration conditioner, and amendment comprises the following each component of weight percent: 30 ~ 70% desulphurize fly ash, 5 ~ 15% magnesium salts, 5 ~ 30% molysite, 2 ~ 20% aluminium salt, 0.1 ~ 15% magnesium oxide.
According to sludge dehydration conditioner of the present invention, described desulphurize fly ash comes from one or more by products in circulating fluidized bed, rotating spraying, gas suspension absorption, the activation of flue dry sorbent injection, in-furnace calcium spraying calcium oxide, novel all-in-one and Wingdale gas cleaning dry method/semi-dry method flue gas desulfurization technique.
Further, CaSO in described desulphurize fly ash
31/2H
2o, CaCO
3, f-CaO and Ca (OH)
2the total mass mark of four kinds of materials is 50 ~ 95%.
Wherein, described magnesium salts is the one in magnesium chloride, trimagnesium phosphate, magnesium sulfate; Described molysite is the one in iron trichloride, ferric sulfate, bodied ferric sulfate, green vitriol; Described aluminium salt is the one in polymerize aluminum chloride, Tai-Ace S 150, alum, PAFS.
Present invention also offers the dewatering of above-mentioned sludge dehydration conditioner, comprise the steps:
(1) amendment solution preparation: by desulphurize fly ash, magnesium salts, molysite, aluminium salt, magnesium oxide according to weight percent, mixing, adds water and makes solution;
(2) mud is modified: second pond mud is pumped into modified pond, adds amendment solution, stirs, and after modified 20 ~ 60min, pumps into sludge thickener; The add-on of described amendment accounts for 3 ~ 30% of mud dry weight;
(3) flocculant solution preparation: after organic polymer coargulator is dissolved into liquid, more under agitation, slowly add sludge thickener, mix 20 ~ 60min with the mud adding adjusting material solution;
(4) sludge dewatering: modified good mud is carried out positive press-dehydrating, dwell pressure 0.6MPa ~ 2.0MPa, release blowing after dwell time 30 ~ 90min.
The add-on of step (2) amendment refers to its amount of solid.
As above-mentioned, described desulphurize fly ash comes from one or more by products in circulating fluidized bed, rotating spraying, gas suspension absorption, the activation of flue dry sorbent injection, in-furnace calcium spraying calcium oxide, novel all-in-one and Wingdale gas cleaning dry method/semi-dry method flue gas desulfurization technique;
CaSO in described desulphurize fly ash
31/2H
2o, CaCO
3, f-CaO and Ca (OH)
2the total mass mark of four kinds of materials is 50 ~ 95%.
The electrical counteract of desulphurize fly ash and adsorption bridging effect, can destroy the stability of mud colloidal solid, is beneficial to the short grained gathering of dispersion, improves dewatering; The alkaline components such as free calcium oxide wherein, calcium hydroxide not only can play Coagulation aiding, in alkaline environment, change and destroy the organic constitution of water-borne glue body particle surface, make polymeric flocculant more directly and colloidal solid effect, reach enhanced coagulation, accelerate the effect of filtration.In addition, desulphurize fly ash particle diameter is thin, has larger specific surface area and pore volume, can adsorb the toxic substance in mud, have certain passivation for heavy metal.
Described magnesium salts is the one in magnesium chloride, trimagnesium phosphate, magnesium sulfate.
Magnesium salts, as coagulant aids, except adjustment pH, can also change the structure of mud granule, form porous web trellis skeleton, greatly improve the compressibility of mud in mud, strengthen the intensity of flco.
Described molysite is the one in iron trichloride, ferric sulfate, bodied ferric sulfate, green vitriol.
Molysite (as iron trichloride, ferric sulfate, bodied ferric sulfate etc.) hydrolysis forms colloid hydrocarbyl polymers or precipitation of hydroxide, adhered to by electrostatic, net is caught etc. acts on the stability changing macrobead mud, and volume sweeps the floc particle that small-particle mud is formed with certain bearing capacity.
Described aluminium salt is the one in polymerize aluminum chloride, Tai-Ace S 150, alum, PAFS.
Adding of aluminium salt, there is heavy metal-passivated and effect that is deodorization and sterilization, the heavy metal of ionic condition can be made in alkaline environment to generate precipitation of hydroxide.
Preferably, in above-mentioned steps (3), described organic polymer coargulator is the one in cationic-type polyacrylamide, anion-polyacrylamide, non-ionic polyacrylamide, zwitter-ion polyacrylamide.More preferably molecular weight is the cationic-type polyacrylamide of 800-1200 ten thousand.
Organic polymer coargulator has charge neutralization, adsorption bridging, surface adsorption, involves the effects such as enhancing in mud, adding of it, tiny suspended particle and colloidal particle in modified rear mud can be made to be agglomerated into thicker floc sedimentation, along with the increase of floc sedimentation, settling velocity increases gradually, thus has better press filtration performance.
Preferably, the add-on of described organic polymer coargulator is 0.001 ~ 0.02% of mud dry weight.Volume pump is adopted evenly to add.Flocculation agent and mud are dry weight herein.
Wherein, described modified before mud be the dredging silt in municipal sludge, alum sludge, industrial sludge or river, river, lake, water ratio is 95 ~ 99%.
Preferably, the mass concentration of described organic polymer coargulator solution is 0.1% ~ 0.5%.
The present invention can realize the high-efficiency dehydration of mud, and conditioning technique is simple, and fast, the consumption of amendment is little, and the moisture percentage in sewage sludge after dehydration can be down to 40 ~ 60%, and sludge specific resistance is down to 106 ~ 107S
2/ g, can realize sludge reduction, significantly reduces the processing cost of follow-up mud.Meanwhile, the present invention can significantly dissolve to be increased in recent years day by day, be difficult to the dry method/semidry method desulphurization ash that effectively utilizes in enterprise, has opened up a mass-producing approach for the stabilization of desulphurize fly ash and building materials utilize.
The present invention is directed sludge thickener enters this operation of plate-and-frame filter press.Object reduces water ratio and the sludge specific resistance of dewatered sludge, realizes mud decrement.
Generally speaking, second pond mud, enters sludge thickener, and the requirement of water ratio is probably 95 ~ 99%, and this mud squeezes into plate-and-frame filter press, the most suitable; Thickened sludge is excessively rare, the board and frame machine cycle of operation factory, operating mode has some setbacks; Too dense, mud mobility is bad, and pump does not get on.Therefore, when " dredging silt in municipal sludge, alum sludge, industrial sludge or river, river, lake " dewaters actually carrying out, need be modulated between 95 ~ 99%, be beneficial to follow-up dewatering operation.
The invention has the beneficial effects as follows:
(1) the invention solves the problem of complex utilization of dry fume/semi-dry desulphurization ash; desulphurize fly ash is in sludge dehydration process; with sludge deep capillary consolidation; not only can realize the deep dehydration of mud; also thoroughly solve desulphurize fly ash building materials and utilize the defect slowly expanded in process, thus the mass-producing that can realize desulphurize fly ash utilizes.
(2) sludge dehydration conditioner of the present invention's exploitation, the raw material sources adopted are extensive, cheap, preparation cost is low, easy to use, dehydrating effect is good, and existing sludge dewatering facility can be relied on to carry out, and implementation process is simple, effectively can improve stability and the reliability of dewatering technology of mud, the process of various waste water, sewage and mud can be widely used in.
(3) adopt the present invention, after sludge dewatering, moisture content of the cake can be down to 40 ~ 60%, and sludge specific resistance is down to 106 ~ 107S2/g.Due to the reduction of resistivity, natural drying is after 10 days, and water ratio can drop to less than 30%.
(4) after this amendment uses, in sludge cake, desulphurize fly ash alkalescence is high, concreteness good, strong with mud granule associativity, can heavy metal effectively in solidification sludge, control the leaching of Heavy Metals in Sludge, oxygenizement can be there is under field conditions (factors) in calcium sulfite composition especially wherein, heavy metal in mud is fully combined, and reduces heavy metal contamination risk.
(5) mud cake after using this amendment to nurse one's health after deep dehydration, in the winter time under outdoor home (round the clock), can reduce the water ratio of at least 5 percentage points, more can reduce by 10 percentage points of water ratio in 48h in 24h.If summer, moisture content of the cake can decline faster.And not with the mud of amendment at equivalent environment and the 4 percentage points of water ratio that can only decline in the time.
In sum, the present invention be a kind ofly effectively can utilize industrial waste, improve sludge dehydration speed and degree of dehydration, cost is low, less developer, preparation and operation simple, reduce heavy metal risk, the high-effective sludge dehydration amendment of the mud cake moisture that continues to scatter and disappear.
Accompanying drawing explanation
Fig. 1 is the technical process of sludge dehydration conditioner preparation and dewatering.
Embodiment
Sludge specific resistance is the composite target representing sludge filtration characteristic, and its physical significance is: the resistance when mud of unit mass filters under a certain pressure in unit filtration area.The effect of resistivity is the strainability of more different mud (or same mud add the mixture of different amount after).Sludge specific resistance is larger, and strainability is poorer.It is generally acknowledged that resistivity is greater than 1 × 10
9the more sad filter of mud, resistivity is less than 4 × 10
8s
2the mud of/g easily filters.
Sludge specific resistance adopts conventional measuring method: adopt the vacuum tightness of 0.08MPa to carry out sludge dewatering test.Record filtering time t and the amount of filtrate V in corresponding moment and filtrate cumulative volume, carry out calculating sludge specific resistance.
Embodiment 1
Mud is the excess sludge taking from certain stainless steel enterprises cold rolling wastewater treatment station second pond, and water ratio is 98%; Desulphurize fly ash is take from the by product of certain steel mill's Circulating Fluidized Bed Process purifying sintering flue gas device, wherein CaSO
31/2H
2o, CaCO
3, f-CaO and Ca (OH)
2the total mass mark of four kinds of materials is 85%.
Magnesium chloride, ferric sulfate, Tai-Ace S 150, magnesium oxide, be commercially available prod, technical grade purity.
As shown in Figure 1, by desulphurize fly ash, magnesium chloride, ferric sulfate, Tai-Ace S 150, magnesium oxide according to the weight percent of 50%, 10%, 30%, 5%, 5%, mix, add water and make solution; According to the ratio of mud dry weight 3%, add in modified pond, stir, after modified 60min, pump into sludge thickener.
By molecular weight be 8,000,000 cationic-type polyacrylamides according to 0.005% of mud dry weight, be dissolved into the glue-like liquid of 0.5%, stir condition under, adopt volume pump be evenly added into concentration basin, with the mud mixing 30min adding adjusting material solution.
Modified good mud, pump into plate-and-frame filter press dehydration, after dwell pressure 1.0MPa, dwell time 60min release blowing, recording dehydrated sludge moisture content of the cake is 50%, sludge specific resistance 4.0 × 10
6s
2/ g, naturally stack after 2 days in canopy, moisture content of the cake is down to 40%.
The operating mode of amendment is not added in contrast: when process water ratio is the second pond mud of the stainless-steel cold-rolling waste water processing station of 98%, the molecular weight adding mud dry weight 0.02% is after 8,000,000 cationic-type polyacrylamides, carry out filter press, at dwell pressure 1.0MPa, after dwell time 60min release blowing, recording dehydrated sludge moisture content of the cake is 65%, sludge specific resistance 1.2 × 10
8s
2/ g, naturally stack after 2 days in canopy, moisture content of the cake is 58%.
Comparative example 1, visible, and the composite dewatering amendment in the present invention is reducing in moisture content of the cake, Be very effective.
Embodiment 2
Mud is the excess sludge taking from certain city sewage plant second pond, and water ratio is 97.5%; Desulphurize fly ash is take from the by product of certain steel mill's rotating spraying technique purifying sintering flue gas device, wherein CaSO
31/2H
2o, CaCO
3, f-CaO and Ca (OH)
2the total mass mark of four kinds of materials is 95%.
Trimagnesium phosphate, iron trichloride, PAFS, magnesium oxide, be commercially available prod, technical grade purity.
As shown in Figure 1, by desulphurize fly ash, magnesium chloride, ferric sulfate, Tai-Ace S 150, magnesium oxide according to the weight percent of 70%, 10%, 10%, 10%, mix, add water and make solution; According to the ratio of mud dry weight 30%, add in modified pond, stir, after modified 20min, pump into sludge thickener.
By molecular weight be 1,200 ten thousand cationic-type polyacrylamides according to 0.001% of mud dry weight, be dissolved into the glue-like liquid of 0.1%, stir condition under, adopt volume pump be evenly added into concentration basin, with the mud mixing 20min adding adjusting material solution.
Modified good mud, pump into plate-and-frame filter press dehydration, after dwell pressure 0.6MPa, dwell time 90min release blowing, recording dehydrated sludge moisture content of the cake is 55%, sludge specific resistance 5.5 × 10
6s
2/ g, naturally stack after 3 days in canopy, moisture content of the cake is down to 42%.
Embodiment 3
Mud is the excess sludge taking from certain waterworks second pond, and water ratio is 99%; Desulphurize fly ash is take from the by product of certain steel mill's in-furnace calcium spraying calcium oxide activating process purifying sintering flue gas device, wherein CaSO
31/2H
2o, CaCO
3, f-CaO and Ca (OH)
2the total mass mark of four kinds of materials is 50%.
Magnesium sulfate, ferric sulfate, PAFS, magnesium oxide are commercially available prod, technical grade purity.
As shown in Figure 1, by desulphurize fly ash, magnesium chloride, ferric sulfate, polymerize aluminum chloride, magnesium oxide according to the weight percent of 30%, 15%, 30%, 10%, 15%, mix, add water and make solution; According to the ratio of mud dry weight 20%, add in modified pond, stir, after modified 50min, pump into sludge thickener.
By molecular weight be 1,000 ten thousand anion-polyacrylamides according to 0.01% of mud dry weight, be dissolved into the glue-like liquid of 0.25%, stir condition under, adopt volume pump be evenly added into concentration basin, with the mud mixing 50min adding adjusting material solution.
Modified good mud, pump into diaphragm filter press dehydration, after dwell pressure 1.2MPa, dwell time 30min release blowing, recording dehydrated sludge moisture content of the cake is 50%, sludge specific resistance 8.5 × 10
6s
2/ g, naturally stack after 5 days in canopy, moisture content of the cake is down to 34%.
Embodiment 4
Mud is the dredging silt taking from certain urban landscape rivers, and water ratio is 95%; Desulphurize fly ash is take from the by product of certain steel mill's flue dry sorbent injection technique purifying sintering flue gas device, wherein CaSO
31/2H
2o, CaCO
3, f-CaO and Ca (OH)
2the total mass mark of four kinds of materials is 80%.
Magnesium chloride, green vitriol, PAFS, magnesium oxide are commercially available prod, technical grade purity.
As shown in Figure 1, by desulphurize fly ash, magnesium chloride, green vitriol, PAFS, magnesium oxide according to the weight percent of 50%, 10%, 20%, 10%, 10%, mix, add water and make solution; According to the ratio of mud dry weight 15%, add in modified pond, stir, after modified 60min, pump into sludge thickener.
By molecular weight be 1,000 ten thousand non-ionic polyacrylamides according to 0.008% of mud dry weight, be dissolved into the glue-like liquid of 0.24%, stir condition under, adopt volume pump be evenly added into concentration basin, with the mud mixing 40min adding adjusting material solution.
Modified good mud, pump into diaphragm filter press dehydration, after dwell pressure 2MPa, dwell time 45min release blowing, recording dehydrated sludge moisture content of the cake is 53%, sludge specific resistance 7.6 × 10
6s
2/ g, naturally stack after 10 days in canopy, moisture content of the cake is down to 28%.
Sludge dehydration conditioner of the present invention effectively can utilize industrial waste, improve sludge dehydration speed and degree of dehydration, simultaneously low, the less developer of cost, preparation and operation simple, reduce heavy metal risk, continue the mud cake moisture that scatters and disappears, be effectively benefiting in sludge dehydration process.
Claims (10)
1. a sludge dehydration conditioner, is characterized in that: amendment comprises the following each component of weight percent: 30 ~ 70% desulphurize fly ash, 5 ~ 15% magnesium salts, 5 ~ 30% molysite, 2 ~ 20% aluminium salt, 0.1 ~ 15% magnesium oxide.
2. sludge dehydration conditioner according to claim 1, it is characterized in that, described desulphurize fly ash comes from one or more by products in circulating fluidized bed, rotating spraying, gas suspension absorption, the activation of flue dry sorbent injection, in-furnace calcium spraying calcium oxide, novel all-in-one and Wingdale gas cleaning dry method/semi-dry method flue gas desulfurization technique.
3. sludge dehydration conditioner according to claim 2, is characterized in that, CaSO in described desulphurize fly ash
31/2H
2o, CaCO
3, f-CaO and Ca (OH)
2the total mass mark of four kinds of materials is 50 ~ 95%.
4. sludge dehydration conditioner according to claim 1, is characterized in that, described magnesium salts is the one in magnesium chloride, trimagnesium phosphate, magnesium sulfate; Described molysite is the one in iron trichloride, ferric sulfate, bodied ferric sulfate, green vitriol; Described aluminium salt is the one in polymerize aluminum chloride, Tai-Ace S 150, alum, PAFS.
5. the dewatering of sludge dehydration conditioner described in claim 1, is characterized in that: comprise the steps:
(1) amendment solution preparation: by desulphurize fly ash, magnesium salts, molysite, aluminium salt, magnesium oxide according to weight percent, mixing, adds water and makes solution;
(2) mud is modified: second pond mud is pumped into modified pond, adds amendment solution, stirs, and after modified 20 ~ 60min, pumps into sludge thickener; The add-on of described amendment accounts for 3 ~ 30% of mud dry weight;
(3) flocculant solution preparation: after organic polymer coargulator is dissolved into liquid, more under agitation, slowly add sludge thickener, mix 20 ~ 60min with the mud adding adjusting material solution;
(4) sludge dewatering: modified good mud is carried out positive press-dehydrating, dwell pressure 0.6MPa ~ 2.0MPa, release blowing after dwell time 30 ~ 90min.
6. the dewatering of sludge dehydration conditioner according to claim 5, it is characterized in that, described desulphurize fly ash comes from one or more by products in circulating fluidized bed, rotating spraying, gas suspension absorption, the activation of flue dry sorbent injection, in-furnace calcium spraying calcium oxide, novel all-in-one and Wingdale gas cleaning dry method/semi-dry method flue gas desulfurization technique;
Described magnesium salts is the one in magnesium chloride, trimagnesium phosphate, magnesium sulfate;
Described molysite is the one in iron trichloride, ferric sulfate, bodied ferric sulfate, green vitriol;
Described aluminium salt is the one in polymerize aluminum chloride, Tai-Ace S 150, alum, PAFS.
7. the dewatering of sludge dehydration conditioner according to claim 5, it is characterized in that, described organic polymer coargulator is the one in cationic-type polyacrylamide, anion-polyacrylamide, non-ionic polyacrylamide, zwitter-ion polyacrylamide.
8. the dewatering of sludge dehydration conditioner according to claim 5, it is characterized in that, the add-on of described organic polymer coargulator, is 0.001 ~ 0.02% of mud dry weight.
9. the dewatering of sludge dehydration conditioner according to claim 5, is characterized in that, described modified before mud be the dredging silt in municipal sludge, alum sludge, industrial sludge or river, river, lake, water ratio is 95 ~ 99%.
10. the dewatering of sludge dehydration conditioner according to claim 5, it is characterized in that, the mass concentration of described organic polymer coargulator solution is 0.1% ~ 0.5%.
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| CN110482831A (en) * | 2019-08-21 | 2019-11-22 | 辽宁省产品质量监督检验院（辽宁省建筑材料监督检验院） | A kind of sludge dewatering composite drug formula and preparation method |
| CN111116011A (en) * | 2019-12-27 | 2020-05-08 | 深圳粤鹏环保技术股份有限公司 | Composite sludge conditioner for treating glass polishing sludge and application thereof |
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| CN111875231A (en) * | 2020-08-05 | 2020-11-03 | 北京首创污泥处置技术有限公司 | Composite sludge deep dehydration medicament and preparation method and use method thereof |
| CN112159073A (en) * | 2020-09-29 | 2021-01-01 | 安徽省融工博大环保技术材料研究院有限公司 | Inorganic mineral composite dehydrating agent for rapid dehydration of sludge and preparation method and application thereof |
| CN112174490A (en) * | 2020-09-25 | 2021-01-05 | 广州市凯卫莎环保科技有限公司 | Process method for treating septic tank |
| CN112194329A (en) * | 2020-10-19 | 2021-01-08 | 四川清和科技有限公司 | Harmless recycling treatment method for river and lake sludge |
| CN113402153A (en) * | 2021-07-19 | 2021-09-17 | 梁政 | Sludge and sludge moisture draining agent |
| CN114230136A (en) * | 2021-11-03 | 2022-03-25 | 山东尚科环境工程有限公司 | Blending modifier for municipal sludge drying treatment and preparation method thereof |
| CN115532230A (en) * | 2022-10-19 | 2022-12-30 | 北京城市排水集团有限责任公司 | Method for preparing sludge-based functional material by acid pickling deliming-high temperature activation, sludge-based functional material and application |
| CN116514362A (en) * | 2023-06-09 | 2023-08-01 | 江苏双晶新能源科技有限公司 | Desulfurization ash preparation and method for conditioning photovoltaic wastewater through desliming |
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