CN116514362A - Desulfurization ash preparation and method for conditioning photovoltaic wastewater through desliming - Google Patents
Desulfurization ash preparation and method for conditioning photovoltaic wastewater through desliming Download PDFInfo
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- CN116514362A CN116514362A CN202310680518.3A CN202310680518A CN116514362A CN 116514362 A CN116514362 A CN 116514362A CN 202310680518 A CN202310680518 A CN 202310680518A CN 116514362 A CN116514362 A CN 116514362A
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 64
- 230000023556 desulfurization Effects 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 39
- 230000003750 conditioning effect Effects 0.000 title claims abstract description 34
- 239000002351 wastewater Substances 0.000 title claims abstract description 27
- 239000010802 sludge Substances 0.000 claims abstract description 72
- 239000002956 ash Substances 0.000 claims abstract description 61
- 239000010881 fly ash Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims abstract description 9
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000010459 dolomite Substances 0.000 claims abstract description 8
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 11
- 230000001143 conditioned effect Effects 0.000 claims description 7
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 238000009472 formulation Methods 0.000 claims 2
- 238000001035 drying Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 10
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000706 filtrate Substances 0.000 abstract description 2
- 229920002401 polyacrylamide Polymers 0.000 description 17
- 238000005345 coagulation Methods 0.000 description 8
- 230000015271 coagulation Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 208000005156 Dehydration Diseases 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- IMGSUTKPDGJDEK-UHFFFAOYSA-N [N].N.[F] Chemical compound [N].N.[F] IMGSUTKPDGJDEK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000009297 electrocoagulation Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- -1 fluoride ions Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- JBKPUQTUERUYQE-UHFFFAOYSA-O pralidoxime Chemical compound C[N+]1=CC=CC=C1\C=N\O JBKPUQTUERUYQE-UHFFFAOYSA-O 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a desulfurized fly ash preparation which comprises the following components in percentage by mass: 50-75% of desulfurized fly ash, 20-25% of polymeric ferric chloride and 10-20% of dolomite powder, wherein in the desulfurized fly ash preparation, the particle fineness of the desulfurized fly ash is more than or equal to 200 meshes, the particle fineness of the polymeric ferric chloride is more than or equal to 50 meshes, the particle fineness of the dolomite powder is more than or equal to 200 meshes, and the desulfurized fly ash is a mixture of steel mill desulfurized fly ash, coal-fired power plant desulfurized fly ash and various desulfurized fly ash, and the invention relates to the technical field of photovoltaic wastewater treatment. The desulfurization ash preparation and the method for desliming and conditioning the photovoltaic wastewater reduce the fluoride ion content of a concentrated sludge pond by 15% -25%, reduce the fluoride ion content of filtrate by about 20%, reduce the water content of mud cakes to 50% -60%, be more beneficial to sludge combustion, and realize waste treatment by waste by using desulfurization ash for conditioning the sludge, thereby having wide economic and ecological benefits.
Description
Technical Field
The invention relates to the technical field of photovoltaic wastewater treatment, in particular to a desulfurization ash preparation and a method for conditioning the photovoltaic wastewater by desliming.
Background
The desulfurization ash is a solid byproduct generated after flue gas desulfurization of coal-fired power plants, steel plants, pellet plants and the like, and mainly comprises desulfurization reaction products, unreacted desulfurizing agents, flue fly ash and the like.
The photovoltaic wastewater generally refers to high COD and high ammonia nitrogen fluorine-containing wastewater generated in the process of producing solar cells by photovoltaic enterprises. The production process of the solar crystalline silicon battery mainly comprises working procedures such as texturing, etching, printing and the like, and because a large amount of chemicals such as hydrofluoric acid and the like are used in the production working procedures, the concentration of fluoride ions in the generated wastewater is high, the corrosiveness is strong, and the method is a serious difficulty in wastewater treatment in the photovoltaic industry.
Currently, common treatment methods for fluorine-containing wastewater include chemical precipitation, coagulation precipitation, electrocoagulation, reverse osmosis, and the like. The lime water neutralization precipitation method is the most economical method, and can achieve the effects of neutralizing acid and denitriding simultaneously, and the lime water neutralization precipitation method generally adopts calcium chloride and limestone as medicaments. Therefore, in the photovoltaic wastewater treatment process, the desulfurization ash is used as one of the raw materials for sludge treatment, so that the fluorine content in wastewater can be reduced, the sludge can be conditioned, the recycling of the desulfurization ash is realized, and the effect of treating waste by waste is achieved.
The amount of the discharged desulfurization ash exceeds 140 ten thousand tons each year in China, and only a small part of desulfurization products are utilized primarily because the property of the desulfurization ash is unstable in the utilization process, and most of desulfurization products are mainly stacked and discarded, so that secondary pollution is caused and land occupation is caused. The effective treatment and comprehensive utilization of such misplaced resources of the desulfurization ash are increasingly receiving attention from vast students and enterprises.
In the sludge treatment process, due to the special floccule structure and high hydrophilicity of the sludge particles, the contained water is difficult to remove, and the sludge conditioning can change the characteristics of the sludge particles, so that the operation difficulty is reduced. At present, a reasonable method is a chemical conditioning method. The chemical conditioning method is simple to operate, low in investment cost and stable in conditioning effect. Typical chemical conditioning agents are mainly inorganic coagulants (e.g. polymeric ferric chloride, PFC) and organic polymeric flocculants (e.g. polyacrylamide, PAM). However, these chemical conditioning agents are often costly, and sludge pressed by the chemical conditioning method still has the problems of high water content, finer particles, smaller specific gravity and easy decomposition and odor.
The treatment and disposal of the sludge should follow the principles of reduction, stabilization and harmlessness. In recent years, the heat value of the dry sludge is 10000-15000 kJ, which is higher than that of coal and coke, and a large amount of heat can be released by combustion. Therefore, the desulfurization ash preparation is explored for reducing the water content of the water treatment sludge, so that the combustibility of the sludge is improved, the treatment of waste with waste is realized, the energy is saved, and the consumption is reduced, and the desulfurization ash preparation has wide economic benefit prospect and social benefit prospect.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a desulfurization ash preparation and a method for conditioning the photovoltaic wastewater by desliming, and solves the problem that the desulfurization ash and the photovoltaic wastewater are not good in treatment effect.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the desulfurization ash preparation consists of the following components in percentage by mass: 50-75% of desulfurized fly ash, 20-25% of polymeric ferric chloride and 10-20% of dolomite powder.
Preferably, in the desulfurization ash preparation, the particle fineness of the desulfurization ash is more than or equal to 200 meshes, the particle fineness of the polymeric ferric chloride is more than or equal to 50 meshes, and the particle fineness of the dolomite powder is more than or equal to 200 meshes.
Preferably, the desulfurization ash is a mixture of steel mill desulfurization ash, coal-fired power plant desulfurization ash and a plurality of desulfurization ash.
Preferably, the desulfurized fly ash preparation is stored in a dry environment with the water content lower than 10%, and the service life of the desulfurized fly ash preparation has strong relevance with the water content of air.
The invention also discloses a method for desliming and conditioning the photovoltaic wastewater by using the sulfur ash preparation, which comprises the following steps:
s1, concentrating: concentrating the sludge with the water content of 98-99% to the water content of 95-97% to obtain concentrated sludge;
s2, conditioning: adding the desulfurization ash preparation into the concentrated sludge, and then adding PAM solution with the mass fraction of 0.1% -0.15%, and fully and uniformly stirring to obtain conditioned sludge;
s3, dehydration: and dehydrating the conditioned sludge to obtain dehydrated sludge with the water content of 52-67%.
Preferably, in the step S1, the sludge is biochemical sludge treated by the photovoltaic wastewater, and the sludge dewatering method uses any one of a plate-and-frame filter press and a spiral shell stacking mud press, the dewatering pressure is 1-2 MPa, and the dewatering time is 20-30 min.
Preferably, in the step S2, the desulfurization ash preparation is added according to the addition amount of 2-3 kg/m3 of concentrated sludge, the PAM solution is added according to 100-200L/m 3 of concentrated sludge, the stirring speed is controlled to be 110-150 r/min, and the stirring time is 10-25 min.
Advantageous effects
The invention provides a desulfurization ash preparation and a method for conditioning photovoltaic wastewater by desliming. Compared with the prior art, the method has the following beneficial effects:
(1) The desulfurization ash preparation and the method for desliming and conditioning the photovoltaic wastewater, which are disclosed by the invention, are used for conditioning the sludge, so that the fluorine ion content of a concentrated sludge pool is reduced by 15% -25%, and the fluorine ion content of filtrate is reduced by about 20%.
(2) The desulfurization ash preparation and the method for sludge removal conditioning of the photovoltaic wastewater, after the desulfurization ash preparation is used for conditioning sludge, the water content of a sludge cake can be reduced to 50-60% by mechanical dehydration, so that the sludge combustion is facilitated.
(3) The desulfurization ash preparation and the method for sludge removal conditioning of the photovoltaic wastewater realize waste treatment by using waste through the use of the desulfurization ash for sludge conditioning, and have wide economic and ecological benefits.
Drawings
Fig. 1 is a flow chart of the desliming conditioning of the photovoltaic wastewater of the present invention.
In the figure: 1-PAM tank mixer, 2-PAM tank, 3-PAM solution, 4-dosing pump, 5-coagulation tank, 6-sludge pump, 7-mixed condensate, 8-storage tank, 9-desulfurization ash mixing agent, 10-discharge valve, 11-coagulation tank mixer, 12-overflow port, 13-spiral shell mud press and 14-dry sludge.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: the desulfurization ash preparation consists of the following components in percentage by mass: 50-75% of desulfurized fly ash, 20-25% of polymeric ferric chloride and 10-20% of dolomite powder.
In the desulfurization ash preparation, the particle fineness of the desulfurization ash is more than or equal to 200 meshes, the particle fineness of the polymeric ferric chloride is more than or equal to 50 meshes, and the particle fineness of the dolomite powder is more than or equal to 200 meshes.
In the invention, the desulfurization ash is a mixture of steel mill desulfurization ash, coal-fired power plant desulfurization ash and various desulfurization ash.
In the invention, the desulfurized fly ash preparation is stored in a dry environment with the water content lower than 10%, and the service life of the desulfurized fly ash preparation has strong relevance with the air water content.
The invention also discloses a method for desliming and conditioning the photovoltaic wastewater by using the sulfur ash preparation, which comprises the following steps:
s1, concentrating: concentrating the sludge with the water content of 98-99% to the water content of 95-97% to obtain concentrated sludge;
s2, conditioning: adding the desulfurization ash preparation into the concentrated sludge, and then adding PAM solution with the mass fraction of 0.1% -0.15%, and fully and uniformly stirring to obtain conditioned sludge;
s3, dehydration: and dehydrating the conditioned sludge to obtain dehydrated sludge with the water content of 52-67%.
In the invention, in the step S1, the sludge is biochemical sludge for treating the photovoltaic wastewater, any one of a plate-and-frame filter press and a spiral shell stacking mud press is used in the sludge dewatering method, the dewatering pressure is 1-2 MPa, and the dewatering time is 20-30 min.
In the invention, in the S2, the adding amount of the desulfurization ash preparation is added according to 2-3 kg/m3 of concentrated sludge, the PAM solution is added according to 100-200L/m 3 of concentrated sludge, the stirring speed is controlled to be 110-150 r/min, and the stirring time is 10-25 min.
PAM (polyacrylamide) and tap water are added into a PAM tank 2 according to a certain proportion, the PAM tank is stirred for 30 minutes by a PAM tank stirrer 1 to obtain 0.1 to 0.15 percent of PAM solution 3, the PAM solution 3 is added into a coagulation tank 5 by a dosing pump 4, and the PAM solution 3 is added into concentrated sludge according to 100 to 200L/m 3. Concentrating the sludge with the water content of 98-99% to the water content of 95-97% to obtain concentrated sludge, storing the concentrated sludge into a concentrated sludge pool, and pumping the concentrated sludge into the coagulation tank 5 through the sludge pump 6. The desulfurization ash mixture 9 is stored in a storage tank 8 and is sowed into the coagulation tank 5 under the action of gravity, a discharge valve 10 controls the sowing flow, and the addition amount of the desulfurization ash mixture 9 is generally 2-3 kg/m3 of concentrated sludge to be sowed. The PAM solution 3, the concentrated sludge and the desulfurization ash mixture 9 are fully stirred in a coagulation tank 5, the stirring speed of a coagulation stirrer 11 is controlled to be 110-150 r/min, and the stirring time is 10-25 min, so that the mixed condensate 7 is formed. The mixed condensate 7 flows into a spiral shell mud pressing machine 13 through an overflow port 12 for dehydration treatment to obtain dehydrated dry mud 14 with the water content of 52-67%, and finally the dehydrated dry mud is treated outside a truck hauling-away agent.
The technical scheme starts from the concept of treating waste with waste, the utilization of the desulfurization ash and the improvement of the dehydration performance of the sludge are tightly combined, and the desulfurization ash preparation is obtained by optimizing the conditioning formula based on the research of the mechanism of conditioning the sludge by the desulfurization ash. The desulfurization ash is used for replacing the conventional sludge conditioner, so that the sludge dewatering cost is reduced, and the sludge dewatering performance is improved.
The desulfurized fly ash particles include, but are not limited to, steel mill desulfurized fly ash, coal-fired power plant desulfurized fly ash, mixtures of various desulfurized fly ash, and further processed products of desulfurized fly ash such as calcium sulfate whiskers, desulfurized lime powder, and the like.
Sludge dewatering equipment including, but not limited to, plate and frame filter presses, belt filter presses and centrifuges, spiral shell stacking machines, and the like.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A desulfurized fly ash formulation characterized by: the composition comprises the following components in percentage by mass: 50-75% of desulfurized fly ash, 20-25% of polymeric ferric chloride and 10-20% of dolomite powder.
2. The desulfurization ash preparation as claimed in claim 1, and a method for desliming and conditioning of photovoltaic wastewater, wherein the method comprises the following steps: in the desulfurization ash preparation, the particle fineness of the desulfurization ash is more than or equal to 200 meshes, the particle fineness of the polymeric ferric chloride is more than or equal to 50 meshes, and the particle fineness of the dolomite powder is more than or equal to 200 meshes.
3. The desulfurization ash preparation as claimed in claim 1, and a method for desliming and conditioning of photovoltaic wastewater, wherein the method comprises the following steps: the desulfurization ash is a mixture of steel mill desulfurization ash, coal-fired power plant desulfurization ash and various desulfurization ash.
4. The desulfurization ash preparation as claimed in claim 1, and a method for desliming and conditioning of photovoltaic wastewater, wherein the method comprises the following steps: the desulfurized fly ash preparation is stored in a drying environment with the water content lower than 10%, and the service life of the desulfurized fly ash preparation has strong relevance with the air water content.
5. The desulfurized fly ash formulation of any one of claims 1-4, wherein: the method for desliming and conditioning the photovoltaic wastewater specifically comprises the following steps:
s1, concentrating: concentrating the sludge with the water content of 98-99% to the water content of 95-97% to obtain concentrated sludge;
s2, conditioning: adding the desulfurization ash preparation into the concentrated sludge, and then adding PAM solution with the mass fraction of 0.1% -0.15%, and fully and uniformly stirring to obtain conditioned sludge;
s3, dehydration: and dehydrating the conditioned sludge to obtain dehydrated sludge with the water content of 52-67%.
6. The desulfurization ash preparation as claimed in claim 1, and a method for desliming and conditioning of photovoltaic wastewater, wherein the method comprises the following steps: in the step S1, the sludge is biochemical sludge treated by the photovoltaic wastewater, and the sludge dewatering method uses any one of a plate-and-frame filter press and a spiral shell stacking mud press, wherein the dewatering pressure is 1-2 MPa, and the dewatering time is 20-30 min.
7. The desulfurization ash preparation as claimed in claim 1, and a method for desliming and conditioning of photovoltaic wastewater, wherein the method comprises the following steps: in the step S2, the desulfurization ash preparation is added according to the addition amount of 2-3 kg/m3 of concentrated sludge, the PAM solution is added according to 100-200L/m 3 of concentrated sludge, the stirring speed is controlled to be 110-150 r/min, and the stirring time is 10-25 min.
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| CN105314815A (en) * | 2014-05-29 | 2016-02-10 | 宝山钢铁股份有限公司 | Sludge dewatering conditioning agent and dewatering method thereof |
| CN106673400A (en) * | 2016-12-26 | 2017-05-17 | 武汉美丽东方环保有限公司 | Sludge dewatering conditioner and application thereof in dewatering |
| 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 |
| CN114538745A (en) * | 2022-03-24 | 2022-05-27 | 广东卓信环境科技股份有限公司 | Sludge conditioner and sludge dewatering method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314815A (en) * | 2014-05-29 | 2016-02-10 | 宝山钢铁股份有限公司 | Sludge dewatering conditioning agent and dewatering method thereof |
| CN106673400A (en) * | 2016-12-26 | 2017-05-17 | 武汉美丽东方环保有限公司 | Sludge dewatering conditioner and application thereof in dewatering |
| 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 |
| CN114538745A (en) * | 2022-03-24 | 2022-05-27 | 广东卓信环境科技股份有限公司 | Sludge conditioner and sludge dewatering method |
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