CN114524539A - System and method for reusing sewage discharged from clarification tank in desulfurization process water - Google Patents
System and method for reusing sewage discharged from clarification tank in desulfurization process water Download PDFInfo
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- CN114524539A CN114524539A CN202210104538.1A CN202210104538A CN114524539A CN 114524539 A CN114524539 A CN 114524539A CN 202210104538 A CN202210104538 A CN 202210104538A CN 114524539 A CN114524539 A CN 114524539A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 208
- 239000010865 sewage Substances 0.000 title claims abstract description 162
- 238000000034 method Methods 0.000 title claims abstract description 130
- 238000005352 clarification Methods 0.000 title claims abstract description 108
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 107
- 230000023556 desulfurization Effects 0.000 title claims abstract description 107
- 238000011282 treatment Methods 0.000 claims abstract description 124
- 238000001914 filtration Methods 0.000 claims abstract description 36
- 238000003756 stirring Methods 0.000 claims abstract description 30
- 239000002351 wastewater Substances 0.000 claims abstract description 28
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 22
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 19
- 239000000126 substance Substances 0.000 claims abstract description 19
- 238000011221 initial treatment Methods 0.000 claims abstract description 12
- 238000004064 recycling Methods 0.000 claims abstract description 9
- 238000005189 flocculation Methods 0.000 claims description 36
- 230000016615 flocculation Effects 0.000 claims description 36
- 238000006243 chemical reaction Methods 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 17
- 238000000926 separation method Methods 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000000376 reactant Substances 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 8
- 238000009388 chemical precipitation Methods 0.000 claims description 5
- 238000005342 ion exchange Methods 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 230000003311 flocculating effect Effects 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims description 3
- 238000010979 pH adjustment Methods 0.000 description 12
- 238000004062 sedimentation Methods 0.000 description 9
- 239000008235 industrial water Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 3
- 229910001626 barium chloride Inorganic materials 0.000 description 3
- 229910001422 barium ion Inorganic materials 0.000 description 3
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 3
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000005374 membrane filtration Methods 0.000 description 3
- 230000001376 precipitating effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000000638 solvent extraction Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a system and a method for reusing sewage discharged from a clarification tank in desulfurization process water, wherein the system comprises a wastewater storage tank, a pretreatment module, a comprehensive treatment module and a desulfurization process water storage tank, wherein the wastewater storage tank is used for storing sewage discharged from the clarification tank and introducing the sewage discharged from the clarification tank into the pretreatment module; the pretreatment module comprises a filtering tank, a stirring tank, a pH adjusting tank and a clean water tank which are sequentially arranged along the sewage treatment flow; the comprehensive treatment module comprises a primary treatment tank, a secondary treatment tank and a tertiary treatment tank. The invention comprehensively treats the sewage of the clarification tank through the pretreatment module and the comprehensive treatment module, removes insoluble substances in the sewage of the clarification tank, adjusts the pH value of the sewage of the clarification tank, reduces the mass concentration of inert substances, chloride ions and sulfate ions in the sewage of the clarification tank, and ensures that the sewage of the clarification tank meets the water quality standard of desulfurization process water, thereby recycling the sewage of the clarification tank and saving water resources.
Description
Technical Field
The invention particularly relates to the technical field of sewage recycling of a clarification tank, and particularly relates to a system and a method for reusing sewage of the clarification tank in desulfurization process water.
Background
The desulfurizing process with limestone/lime-gypsum method mainly uses limestone, lime or sodium carbonate as washing liquid to wash fume in reaction tower to eliminate SO2 from fume. The SO2 in the flue gas chemically reacts with CaCO3 or CaO in the slurry and the incoming air, and the final product is gypsum. And the desulfurized flue gas needs to be subjected to water drop and water mist removal by a water mist eliminator.
The invention patent with the publication number of CN110624437A discloses a replacement device for desulfurization process water and desulfurization industrial water, which comprises four groups of flow limiting valves and flange plates, wherein the right side of the upper end of each flow limiting valve is provided with a metering device, the flow limiting valves are provided with upper connecting pipes, the right parts of the outer surfaces of the flow limiting valves are connected with industrial water pipes through the flange plates, the lower ends of the flow limiting valves are connected with connecting valves through the flange plates, the left ends of the middle connecting pipes are connected with the process water pipes through the flange plates, a mixing device is arranged in each connecting valve, the lower ends of the connecting valves are connected with lower connecting pipes, and the lower ends of the lower connecting pipes are connected with water outlet pipes through the flange plates.
Above-mentioned this replacement device can be connected desulfurization industrial water and desulfurization process water fast and mix the utilization together, and effective control desulfurization industrial water's quantity practices thrift the cost, and the comprehensive water resource of utilizing still has following problem:
the water consumption in the desulfurization system is large, fresh water obtained after desalination of sea water is adopted as process water for the desulfurization system in the prior art, the water production cost is high, a small part of treated sewage in a clarification tank is recycled after treatment, and the rest is directly discharged outside, so that the industrial water utilization rate is low, the industrial discharge capacity is increased, the industrial water cost is high, and the sewage utilization rate of the clarification tank is low.
Disclosure of Invention
The invention aims to provide a system and a method for reusing sewage discharged from a clarification tank in desulfurization process water, and aims to solve the problems that the consumption of the desulfurization system water provided in the background art is high, the process water of the desulfurization system in the prior art adopts fresh water obtained by desalting seawater, the water production cost is high, part of the sewage of the clarification tank after industrial wastewater is treated is recycled after treatment, and the rest of the sewage is directly discharged outside, so that the industrial water utilization rate is low, the industrial sewage discharge amount is increased, the industrial water cost is high, and the sewage utilization rate of the clarification tank is low.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a system for clarification tank blowdown water is recycled to desulfurization process water, includes waste water storage tank, pretreatment module, comprehensive treatment module and desulfurization process water storage tank, wherein:
the wastewater storage tank is used for storing sewage discharged by the clarification tank and introducing the sewage discharged by the clarification tank into the pretreatment module;
the pretreatment module comprises a filtering tank, a stirring tank, a pH adjusting tank and a clean water tank which are sequentially arranged along a sewage treatment process, wherein the filtering tank receives sewage of a clarification tank introduced from a wastewater storage tank, and the sewage flows into the clean water tank for storage after being sequentially treated by the filtering tank, the stirring tank and the pH adjusting tank;
the comprehensive treatment module comprises a primary treatment tank, a secondary treatment tank and a tertiary treatment tank, wherein the primary treatment tank is used for removing inert substances in sewage, the secondary treatment tank is used for reducing the mass concentration of chloride ions in the sewage, and the tertiary treatment tank is used for reducing the mass concentration of sulfate ions so as to convert sewage in a clarification tank into desulfurization process water meeting a desulfurization process after treatment.
As a further scheme of the invention: the filter tank is used for filtering and removing suspended insoluble substances in the sewage of the clarification tank, and the filter tank filters the sewage of the clarification tank by adopting a filter material; the stirring pond is used for stirring, aerating the clarification tank sewage, makes the clarification tank sewage misce bene, and the stirring pond is for adopting pump and compressed air to the mixed mode of clarification tank sewage.
As a still further scheme of the invention: the pH adjusting tank is used for adjusting the pH value of the sewage discharged by the clarification tank, and the pH value of the sewage discharged by the clarification tank is adjusted by adding an acid/alkali solution into the pH adjusting tank, so that the pH value of the sewage discharged by the clarification tank meets the water quality standard of desulfurization process water.
As a still further scheme of the invention: the pretreatment module also comprises a reaction tank and a flocculation tank, wherein the reaction tank is communicated with the pH adjusting tank and the flocculation tank, and the flocculation tank is communicated with the clean water tank.
As a still further scheme of the invention: the modes of reducing the mass concentration of the chloride ions in the sewage by the secondary treatment tank comprise a salt precipitation mode and a separation interception mode.
As a still further scheme of the invention: the modes for reducing the mass concentration of sulfate ions by the three-stage treatment tank comprise a chemical precipitation method, an ion exchange method and a membrane separation method.
As a still further scheme of the invention: the device also comprises a detection module, a charging module and a circulating processing module.
As a still further scheme of the invention: the detection module is connected with the pretreatment module, the comprehensive treatment module and a water quality sensor arranged in the desulfurization process water storage pool and is used for acquiring water quality information of sewage in the pretreatment module, the comprehensive treatment module and the desulfurization process water storage pool; the feeding module is connected with the pretreatment module and the comprehensive treatment module and is used for adding a reactant into the pretreatment module and the comprehensive treatment module; the circulating treatment module comprises a circulating pump, the water inlet end of the circulating pump is connected with the desulfurization process water storage pool, and the water outlet end of the circulating pump is connected with the pretreatment module or the comprehensive treatment module.
A method for reusing sewage discharged from a clarification tank in a system for desulfurizing process water comprises the following steps:
s100, collecting and storing sewage discharged by a clarification tank;
s200, pretreating sewage discharged from the clarification tank, wherein the pretreatment method comprises the following steps: filtering, stirring, aerating, flocculating and adjusting pH to obtain pretreated sewage;
s300, carrying out comprehensive treatment on the pretreated sewage, wherein the comprehensive treatment method comprises the following steps: removing inert substances, reducing the concentration of chloride ions and reducing the concentration of sulfate ions to obtain comprehensively treated sewage;
s400, discharging the comprehensively treated sewage into a desulfurization process water storage pool for storage, performing water quality detection on the comprehensively treated sewage, and comparing the water quality of the comprehensively treated sewage with the water quality data of the desulfurization process water to obtain a comparison result;
s500, returning to S200 when the comparison result does not meet the water quality standard of the desulfurization process water, performing circulating treatment on the comprehensive treatment sewage, and adjusting the feeding amount during pretreatment and comprehensive treatment; and (4) introducing the comprehensively treated sewage into a desulfurization system when the comparison result meets the water quality standard of desulfurization process water.
Compared with the prior art, the invention has the beneficial effects that: the invention carries out comprehensive treatment on the effluent of the clarification tank by arranging the pretreatment module and the comprehensive treatment module, removes insoluble substances in the effluent of the clarification tank, adjusts the pH value of the effluent of the clarification tank, reduces the mass concentration of inert substances, chloride ions and sulfate ions in the effluent of the clarification tank, and leads the effluent of the clarification tank to accord with the water quality standard of desulfurization process water, thereby recycling the effluent of the clarification tank and saving water resources.
Drawings
FIG. 1 is a block diagram of a system for reusing clarifier effluent in desulfurization process water.
FIG. 2 is a block diagram of the pretreatment module in a system for reusing clarifier effluent in desulfurization process water.
FIG. 3 is a block diagram of the structure of the integrated treatment module in the system for reusing clarifier effluent in the desulfurization process water.
FIG. 4 is a block diagram of the structure of the detection module in the system for reusing clarifier effluent in the desulfurization process water.
FIG. 5 is a flow chart of a method for reusing clarifier effluent in desulfurization process water.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses a system for reusing sewage discharged by a clarification tank in desulfurization process water, which comprises a wastewater storage tank, a pretreatment module, a comprehensive treatment module and a desulfurization process water storage tank, wherein: the wastewater storage tank is used for storing sewage discharged by the clarification tank and introducing the sewage discharged by the clarification tank into the pretreatment module; the pretreatment module comprises a filter tank, a stirring tank, a pH adjusting tank and a clean water tank which are sequentially arranged along the sewage treatment process; the comprehensive treatment module comprises a primary treatment tank, a secondary treatment tank and a tertiary treatment tank. The invention carries out comprehensive treatment on the effluent of the clarification tank by arranging the pretreatment module and the comprehensive treatment module, removes insoluble substances in the effluent of the clarification tank, adjusts the pH value of the effluent of the clarification tank, reduces the mass concentration of inert substances, chloride ions and sulfate ions in the effluent of the clarification tank, and leads the effluent of the clarification tank to accord with the water quality standard of desulfurization process water, thereby recycling the effluent of the clarification tank and saving water resources.
The following is a detailed description with reference to the examples:
example 1
Referring to fig. 1-3, in the embodiment of the present invention, a system for reusing clarifier effluent as desulfurization process water is applied to the technical field of clarifier effluent recycling, and in particular, the present invention relates to the technical field of clarifier effluent as desulfurization process water, and the system for reusing clarifier effluent as desulfurization process water comprises a wastewater storage tank 100, a pretreatment module 200, a comprehensive treatment module 300 and a desulfurization process water storage tank 400;
the wastewater storage tank 100 is used for storing sewage discharged by the clarification tank and introducing the sewage discharged by the clarification tank into the pretreatment module 200;
the pretreatment module 200 comprises a filtering tank 210, a stirring tank 220, a pH adjusting tank 230 and a clean water tank 260 which are sequentially arranged along a sewage treatment process, wherein the filtering tank 210 receives clarification tank sewage introduced from the wastewater storage tank 100, and the sewage flows into the clean water tank 260 for storage after being sequentially treated by the filtering tank 210, the stirring tank 220 and the pH adjusting tank 230;
the comprehensive treatment module 300 comprises a primary treatment tank 310, a secondary treatment tank 320 and a tertiary treatment tank 330, wherein the primary treatment tank 310 is used for removing inert substances in sewage, the secondary treatment tank 320 is used for reducing the mass concentration of chloride ions in the sewage, and the tertiary treatment tank 330 is used for reducing the mass concentration of sulfate ions, so that the sewage in the clarification tank is converted into desulfurization process water according with a desulfurization process after being treated.
In the embodiment of the present invention, it should be noted that the filtering tank 210 is used for filtering and removing suspended insoluble substances in the sewage of the clarification tank, and the filtering tank 210 filters the sewage of the clarification tank by using a filter material, in this embodiment, the filter material is a filter plate; the stirring tank 220 is used for stirring and aerating the sewage discharged by the clarification tank to uniformly mix the sewage discharged by the clarification tank, and the stirring tank 220 adopts a pump and compressed air for mixing the sewage discharged by the clarification tank; the pH adjusting tank 230 is used for adjusting the pH value of the sewage discharged from the clarification tank, the pH value of the desulfurization process water is generally 6-9, and the pH value of the sewage discharged from the clarification tank is adjusted by adding an acid/alkali solution into the pH adjusting tank 230, so that the pH value of the sewage discharged from the clarification tank meets the water quality standard of the desulfurization process water;
further, referring to fig. 2, the pretreatment module 200 further includes a reaction tank 240 and a flocculation tank 250, the reaction tank 240 is communicated with the pH adjustment tank 230 and the flocculation tank 250, and the flocculation tank 250 is communicated with the clean water tank 260, in this embodiment, the reaction tank 240 and the flocculation tank 250 are added between the pH adjustment tank 230 and the clean water tank 260, so that sewage passes through the reaction tank 240 and the flocculation tank 250 to complete coagulation and flocculation reactions, it can be understood that an inclined plate sedimentation tank is further disposed between the flocculation tank 250 and the clean water tank 250, the sewage after flocculation reaction enters the inclined plate sedimentation tank to complete separation of floccules from water, and clean water at the upper portion of the inclined plate sedimentation tank automatically flows into the clean water tank 260;
further, it should be noted that after entering the clean water tank 260, the wastewater after flocculation reaction and precipitation needs to be subjected to pH adjustment, so that the acidity/basicity of the wastewater discharged from the clarification tank meets the water quality standard of the desulfurization process water.
Referring to fig. 3, in the embodiment of the present invention, the manner of reducing the mass concentration of chloride ions in the wastewater by the secondary treatment tank 320 includes: precipitating salt by using Ag + or Hg + and Cl < - > to generate precipitate, and filtering the precipitate to remove Cl < - >; in the separation and interception mode, Cl & lt- & gt is separated and removed by adopting methods such as evaporation concentration, electric adsorption, membrane filtration, solvent extraction, composite flocculant flocculation and the like, in the embodiment, the mass concentration of chloride ions in the sewage is preferably reduced by adopting a precipitated salt mode, so that the mass concentration of the chloride ions in the sewage meets the water quality standard of the desulfurization process water;
the ways of reducing the mass concentration of sulfate ions in the tertiary treatment tank 330 include: chemical precipitation, barium chloride, calcium chloride, barium carbonate, etc.; ion exchange method and membrane separation method to make the mass concentration of sulfate ion in sewage meet the water quality standard of desulfurization process water.
Referring to fig. 1-3 again, in the embodiment of the present invention, the apparatus further includes a detection module 500, a feeding module 600, and a circulation processing module 700, wherein:
the detection module 500 is connected with the pretreatment module 200, the comprehensive treatment module 300 and the water quality sensors arranged in the desulfurization process water storage tank 400, and is used for acquiring the water quality information of the sewage in the pretreatment module 200, the comprehensive treatment module 300 and the desulfurization process water storage tank 400;
the feeding module 600 is connected with the pretreatment module 200 and the comprehensive treatment module 300, and is used for feeding reactants into the pretreatment module 200 and the comprehensive treatment module 300, wherein the reactants include a flocculant fed into the reaction tank 240, an acid/alkali solution fed into the pH adjustment tank 230, Ag + or Hg + fed into the secondary treatment tank 320, barium ions fed into the tertiary treatment tank 330, and the like;
the circulating treatment module 700 comprises a circulating pump, the water inlet end of the circulating pump is connected with the desulfurization process water storage tank 400, and the water outlet end of the circulating pump is connected with the pretreatment module 200 or the comprehensive treatment module 300, and is used for pumping the sewage which does not reach the standard into the pretreatment module 200 or the comprehensive treatment module 300 for circulating treatment.
Example 2
Referring to fig. 1-3, in the embodiment of the present invention, a system for reusing clarifier effluent as desulfurization process water is applied to the technical field of clarifier effluent recycling, and in particular, the present invention relates to the technical field of clarifier effluent as desulfurization process water, and the system for reusing clarifier effluent as desulfurization process water comprises a wastewater storage tank 100, a pretreatment module 200, a comprehensive treatment module 300 and a desulfurization process water storage tank 400;
the wastewater storage tank 100 is used for storing sewage discharged by the clarification tank and introducing the sewage discharged by the clarification tank into the pretreatment module 200;
the pretreatment module 200 comprises a filtering tank 210, a stirring tank 220, a pH adjusting tank 230 and a clean water tank 260 which are sequentially arranged along a sewage treatment process, wherein the filtering tank 210 receives clarification tank sewage introduced from the wastewater storage tank 100, and the sewage flows into the clean water tank 260 for storage after being sequentially treated by the filtering tank 210, the stirring tank 220 and the pH adjusting tank 230;
the comprehensive treatment module 300 comprises a primary treatment tank 310, a secondary treatment tank 320 and a tertiary treatment tank 330, wherein the primary treatment tank 310 is used for removing inert substances in sewage, the secondary treatment tank 320 is used for reducing the mass concentration of chloride ions in the sewage, and the tertiary treatment tank 330 is used for reducing the mass concentration of sulfate ions, so that the sewage in the clarification tank is converted into desulfurization process water according with a desulfurization process after being treated.
In the embodiment of the present invention, it should be noted that the filtering tank 210 is used for filtering and removing suspended insoluble substances in the sewage of the clarification tank, and the filtering tank 210 filters the sewage of the clarification tank by using a filter material, in this embodiment, the filter material is a filter plate; the stirring tank 220 is used for stirring and aerating the sewage discharged by the clarification tank to uniformly mix the sewage discharged by the clarification tank, and the stirring tank 220 adopts a pump and compressed air for mixing the sewage discharged by the clarification tank; the pH adjusting tank 230 is used for adjusting the pH value of the sewage discharged from the clarification tank, the pH value of the desulfurization process water is generally 6-9, and the pH value of the sewage discharged from the clarification tank is adjusted by adding an acid/alkali solution into the pH adjusting tank 230, so that the pH value of the sewage discharged from the clarification tank meets the water quality standard of the desulfurization process water;
further, referring to fig. 2, the pretreatment module 200 further includes a reaction tank 240 and a flocculation tank 250, the reaction tank 240 is communicated with the pH adjustment tank 230 and the flocculation tank 250, and the flocculation tank 250 is communicated with the clean water tank 260, in this embodiment, the reaction tank 240 and the flocculation tank 250 are added between the pH adjustment tank 230 and the clean water tank 260, so that sewage passes through the reaction tank 240 and the flocculation tank 250 to complete coagulation and flocculation reactions, it can be understood that an inclined plate sedimentation tank is further disposed between the flocculation tank 250 and the clean water tank 250, the sewage after flocculation reaction enters the inclined plate sedimentation tank to complete separation of floccules from water, and clean water at the upper portion of the inclined plate sedimentation tank automatically flows into the clean water tank 260;
further, it should be noted that after entering the clean water tank 260, the wastewater after flocculation reaction and precipitation needs to be subjected to pH adjustment, so that the acidity/basicity of the wastewater discharged from the clarification tank meets the water quality standard of the desulfurization process water.
Referring to fig. 3, in the embodiment of the present invention, the manner of reducing the mass concentration of chloride ions in the wastewater by the secondary treatment tank 320 includes: precipitating salt by using Ag + or Hg + and Cl < - > to generate precipitate, and filtering the precipitate to remove Cl < - >; in the separation and interception mode, Cl & lt- & gt is separated and removed by adopting methods such as evaporation concentration, electric adsorption, membrane filtration, solvent extraction, composite flocculant flocculation and the like, in the embodiment, the mass concentration of chloride ions in the sewage is preferably reduced by adopting a precipitated salt mode, so that the mass concentration of the chloride ions in the sewage meets the water quality standard of the desulfurization process water;
the ways of reducing the mass concentration of sulfate ions in the tertiary treatment tank 330 include: chemical precipitation, barium chloride, calcium chloride, barium carbonate, etc.; ion exchange method and membrane separation method to make the mass concentration of sulfate ion in sewage meet the water quality standard of desulfurization process water.
Referring to fig. 1-3 again, in the embodiment of the present invention, the apparatus further includes a detection module 500, a feeding module 600, and a circulation processing module 700, wherein:
the detection module 500 is connected with the pretreatment module 200, the comprehensive treatment module 300 and the water quality sensors arranged in the desulfurization process water storage tank 400, and is used for acquiring the water quality information of the sewage in the pretreatment module 200, the comprehensive treatment module 300 and the desulfurization process water storage tank 400;
the feeding module 600 is connected to the pretreatment module 200 and the comprehensive treatment module 300, and is used for feeding a reactant into the pretreatment module 200 and the comprehensive treatment module 300, wherein the reactant includes a flocculant fed into the reaction tank 240, an acid/alkali solution fed into the pH adjustment tank 230, Ag + or Hg + fed into the secondary treatment tank 320, barium ions fed into the tertiary treatment tank 330, and the like;
the circulating treatment module 700 comprises a circulating pump, the water inlet end of the circulating pump is connected with the desulfurization process water storage tank 400, and the water outlet end of the circulating pump is connected with the pretreatment module 200 or the comprehensive treatment module 300, and is used for pumping the sewage which does not reach the standard into the pretreatment module 200 or the comprehensive treatment module 300 for circulating treatment.
Referring to fig. 4, the embodiment of the invention is different from embodiment 1 in that: the detection module 500 includes a data receiving unit 510, a data processing unit 520, a display unit 530 and an instruction sending unit 540, wherein:
a data receiving unit 510, configured to receive the water quality information sent by the water quality sensor, and send the water quality information data to the data processing unit 520;
a data processing unit 520, configured to receive the water quality information data sent by the data receiving unit 510, perform data processing on the water quality information data to obtain a data processing result, and send the data result to the display unit 530 and the instruction sending unit 540;
the instruction sending unit 540 receives the data processing result sent by the data processing unit 520, sends an instruction to the feeding module 600 and/or the circulation processing module 700 according to the data result, and controls the feeding module 600 to feed the pretreatment module 200 and/or the comprehensive processing module 300 or controls the circulation processing module 700 to circulate the sewage.
Example 3
Referring to fig. 1-3, in the embodiment of the present invention, a system for reusing clarifier effluent as desulfurization process water is applied to the technical field of clarifier effluent recycling, and in particular, the present invention relates to the technical field of clarifier effluent as desulfurization process water, and the system for reusing clarifier effluent as desulfurization process water comprises a wastewater storage tank 100, a pretreatment module 200, a comprehensive treatment module 300 and a desulfurization process water storage tank 400;
the wastewater storage tank 100 is used for storing sewage discharged by the clarification tank and introducing the sewage discharged by the clarification tank into the pretreatment module 200;
the pretreatment module 200 comprises a filtering tank 210, a stirring tank 220, a pH adjusting tank 230 and a clean water tank 260 which are sequentially arranged along a sewage treatment process, wherein the filtering tank 210 receives clarification tank sewage introduced from the wastewater storage tank 100, and the sewage flows into the clean water tank 260 for storage after being sequentially treated by the filtering tank 210, the stirring tank 220 and the pH adjusting tank 230;
the comprehensive treatment module 300 comprises a primary treatment tank 310, a secondary treatment tank 320 and a tertiary treatment tank 330, wherein the primary treatment tank 310 is used for removing inert substances in sewage, the secondary treatment tank 320 is used for reducing the mass concentration of chloride ions in the sewage, and the tertiary treatment tank 330 is used for reducing the mass concentration of sulfate ions, so that the sewage in the clarification tank is converted into desulfurization process water according with a desulfurization process after being treated.
In the embodiment of the present invention, it should be noted that the filtering tank 210 is used for filtering and removing suspended insoluble substances in the sewage of the clarification tank, and the filtering tank 210 filters the sewage of the clarification tank by using a filter material, in this embodiment, the filter material is a filter plate; the stirring tank 220 is used for stirring and aerating the sewage discharged by the clarification tank to uniformly mix the sewage discharged by the clarification tank, and the stirring tank 220 adopts a pump and compressed air for mixing the sewage discharged by the clarification tank; the pH adjusting tank 230 is used for adjusting the pH value of the sewage discharged from the clarification tank, the pH value of the desulfurization process water is generally 6-9, and the pH value of the sewage discharged from the clarification tank is adjusted by adding an acid/alkali solution into the pH adjusting tank 230, so that the pH value of the sewage discharged from the clarification tank meets the water quality standard of the desulfurization process water;
further, referring to fig. 2, the pretreatment module 200 further includes a reaction tank 240 and a flocculation tank 250, the reaction tank 240 is communicated with the pH adjustment tank 230 and the flocculation tank 250, and the flocculation tank 250 is communicated with the clean water tank 260, in this embodiment, the reaction tank 240 and the flocculation tank 250 are added between the pH adjustment tank 230 and the clean water tank 260, so that sewage passes through the reaction tank 240 and the flocculation tank 250 to complete coagulation and flocculation reactions, it can be understood that an inclined plate sedimentation tank is further disposed between the flocculation tank 250 and the clean water tank 250, the sewage after flocculation reaction enters the inclined plate sedimentation tank to complete separation of floccules from water, and clean water at the upper portion of the inclined plate sedimentation tank automatically flows into the clean water tank 260;
further, it should be noted that after entering the clean water tank 260, the wastewater after flocculation reaction and precipitation needs to be subjected to pH adjustment, so that the acidity/basicity of the wastewater discharged from the clarification tank meets the water quality standard of the desulfurization process water.
Referring to fig. 3, in the embodiment of the present invention, the manner of reducing the mass concentration of chloride ions in the wastewater by the secondary treatment tank 320 includes: precipitating salt by reacting Ag + or Hg + with Cl-, and filtering to remove Cl-; in the separation and interception mode, Cl & lt- & gt is separated and removed by adopting methods such as evaporation concentration, electric adsorption, membrane filtration, solvent extraction, composite flocculant flocculation and the like, in the embodiment, the mass concentration of chloride ions in the sewage is preferably reduced by adopting a precipitated salt mode, so that the mass concentration of the chloride ions in the sewage meets the water quality standard of the desulfurization process water;
the ways of reducing the mass concentration of sulfate ions in the tertiary treatment tank 330 include: chemical precipitation, barium chloride, calcium chloride, barium carbonate, etc.; ion exchange method and membrane separation method to make the mass concentration of sulfate ion in sewage meet the water quality standard of desulfurization process water.
Referring to fig. 1-3 again, in the embodiment of the present invention, the apparatus further includes a detection module 500, a feeding module 600, and a circulation processing module 700, wherein:
the detection module 500 is connected with the pretreatment module 200, the comprehensive treatment module 300 and the water quality sensors arranged in the desulfurization process water storage tank 400, and is used for acquiring the water quality information of the sewage in the pretreatment module 200, the comprehensive treatment module 300 and the desulfurization process water storage tank 400;
the feeding module 600 is connected to the pretreatment module 200 and the comprehensive treatment module 300, and is used for feeding a reactant into the pretreatment module 200 and the comprehensive treatment module 300, wherein the reactant includes a flocculant fed into the reaction tank 240, an acid/alkali solution fed into the pH adjustment tank 230, Ag + or Hg + fed into the secondary treatment tank 320, barium ions fed into the tertiary treatment tank 330, and the like;
the circulating treatment module 700 comprises a circulating pump, the water inlet end of the circulating pump is connected with the desulfurization process water storage tank 400, and the water outlet end of the circulating pump is connected with the pretreatment module 200 or the comprehensive treatment module 300, and is used for pumping sewage which does not reach the standard into the pretreatment module 200 or the comprehensive treatment module 300 for circulating treatment.
Referring to fig. 4, the embodiment of the invention is different from embodiment 1 in that: the detection module 500 includes a data receiving unit 510, a data processing unit 520, a display unit 530 and an instruction sending unit 540, wherein:
a data receiving unit 510, configured to receive the water quality information sent by the water quality sensor, and send the water quality information data to the data processing unit 520;
a data processing unit 520, configured to receive the water quality information data sent by the data receiving unit 510, perform data processing on the water quality information data to obtain a data processing result, and send the data result to the display unit 530 and the instruction sending unit 540;
the instruction sending unit 540 receives the data processing result sent by the data processing unit 520, sends an instruction to the feeding module 600 and/or the circulation processing module 700 according to the data result, and controls the feeding module 600 to feed the pretreatment module 200 and/or the comprehensive processing module 300 or controls the circulation processing module 700 to circulate the sewage.
Referring to fig. 5, a method for reusing clarifier effluent in desulfurization process water includes the following steps:
s100, collecting and storing sewage discharged by a clarification tank;
s200, pretreating sewage discharged from the clarification tank, wherein the pretreatment method comprises the following steps: filtering, stirring, aerating, flocculating and adjusting pH to obtain pretreated sewage;
s300, carrying out comprehensive treatment on the pretreated sewage, wherein the comprehensive treatment method comprises the following steps: removing inert substances, reducing the concentration of chloride ions and reducing the concentration of sulfate ions to obtain comprehensively treated sewage;
s400, discharging the comprehensively treated sewage into a desulfurization process water storage pool for storage, performing water quality detection on the comprehensively treated sewage, and comparing the water quality of the comprehensively treated sewage with the water quality data of the desulfurization process water to obtain a comparison result;
s500, returning to S200 when the comparison result does not meet the water quality standard of the desulfurization process water, performing circulating treatment on the comprehensive treatment sewage, and adjusting the feeding amount during pretreatment and comprehensive treatment; and (4) introducing the comprehensively treated sewage into a desulfurization system when the comparison result meets the water quality standard of the desulfurization process water.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a system for clarifier blowdown water is used for desulfurization process water again, its characterized in that includes waste water storage pond (100), preliminary treatment module (200), comprehensive treatment module (300) and desulfurization process water storage pond (400), wherein:
the wastewater storage tank (100) is used for storing sewage discharged by the clarification tank and introducing the sewage discharged by the clarification tank into the pretreatment module (200);
the pretreatment module (200) comprises a filtering tank (210), a stirring tank (220), a pH adjusting tank (230) and a clean water tank (260) which are sequentially arranged along a sewage treatment process, wherein the filtering tank (210) receives clarification tank sewage introduced into the wastewater storage tank (100), and the sewage flows into the clean water tank (260) for storage after being sequentially treated by the filtering tank (210), the stirring tank (220) and the pH adjusting tank (230);
the comprehensive treatment module (300) comprises a primary treatment tank (310), a secondary treatment tank (320) and a tertiary treatment tank (330), wherein the primary treatment tank (310) is used for removing inert substances in sewage, the secondary treatment tank (320) is used for reducing the mass concentration of chloride ions in the sewage, and the tertiary treatment tank (330) is used for reducing the mass concentration of sulfate ions so as to convert the sewage in the clarification tank into desulfurization process water conforming to a desulfurization process after treatment.
2. The system for reusing the sewage of the clarification tank as the desulfurization process water according to claim 1, characterized in that the filtering tank (210) is used for filtering and removing suspended insoluble substances in the sewage of the clarification tank, and the filtering tank (210) adopts a filter material for filtering the sewage of the clarification tank; the stirring tank (220) is used for stirring and aerating the sewage discharged by the clarification tank, so that the sewage discharged by the clarification tank is uniformly mixed, and the stirring tank (220) adopts a pump and compressed air to the sewage discharged by the clarification tank.
3. The system for reusing the effluent of the clarification tank as the desulfurization process water according to claim 2, wherein the pH adjusting tank (230) is used for adjusting the pH value of the effluent of the clarification tank, and the pH value of the effluent of the clarification tank is adjusted by adding an acid/alkali solution into the pH adjusting tank (230) so that the pH value of the effluent of the clarification tank meets the water quality standard of the desulfurization process water.
4. The system for reusing clarifier effluent in desulfurization process water according to claim 1, characterized in that the pretreatment module (200) further comprises a reaction tank (240) and a flocculation tank (250), the reaction tank (240) is communicated with the pH adjusting tank (230) and the flocculation tank (250), and the flocculation tank (250) is communicated with the clean water tank (260).
5. The system for reusing clarifier effluent in desulfurization process water according to claim 1, wherein the means for reducing the mass concentration of chloride ions in the effluent in the secondary treatment tank (320) comprises a precipitated salt means and a separation interception means.
6. The system for reusing clarifier effluent as the desulfurization process water according to claim 1, wherein the ways of reducing the mass concentration of sulfate ions in the tertiary treatment tank (330) include chemical precipitation, ion exchange and membrane separation.
7. The system for recycling sewage of the clarification tank to desulfurization process water according to any one of claims 1 to 6, characterized by further comprising a detection module (500), a feeding module (600) and a recycling treatment module (700).
8. The system for reusing sewage discharged from the clarification tank as desulfurization process water according to claim 7, wherein the detection module (500) is connected with the water quality sensors arranged in the pretreatment module (200), the comprehensive treatment module (300) and the desulfurization process water storage tank (400) and is used for acquiring the water quality information of the sewage in the pretreatment module (200), the comprehensive treatment module (300) and the desulfurization process water storage tank (400); the feeding module (600) is connected with the pretreatment module (200) and the comprehensive treatment module (300) and is used for adding reactants into the pretreatment module (200) and the comprehensive treatment module (300); the circulating treatment module (700) comprises a circulating pump, the water inlet end of the circulating pump is connected with the desulfurization process water storage pool (400), and the water outlet end of the circulating pump is connected with the pretreatment module (200) or the comprehensive treatment module (300).
9. The system for reusing clarifier effluent in desulfurization process water according to claim 7, wherein the detection module (500) comprises a data receiving unit (510), a data processing unit (520), a display unit (530) and an instruction transmitting unit (540).
10. A method of reusing clarifier effluent in a system for desulphurizing process water according to claim 9, characterised in that it comprises the steps of:
s100, collecting and storing sewage discharged by a clarification tank;
s200, pretreating sewage discharged from the clarification tank, wherein the pretreatment method comprises the following steps: filtering, stirring, aerating, flocculating and adjusting pH to obtain pretreated sewage;
s300, carrying out comprehensive treatment on the pretreated sewage, wherein the comprehensive treatment method comprises the following steps: removing inert substances, reducing the concentration of chloride ions and reducing the concentration of sulfate ions to obtain comprehensively treated sewage;
s400, discharging the comprehensively treated sewage into a desulfurization process water storage pool for storage, performing water quality detection on the comprehensively treated sewage, and comparing the water quality of the comprehensively treated sewage with the water quality data of the desulfurization process water to obtain a comparison result;
s500, returning to S200 when the comparison result does not meet the water quality standard of the desulfurization process water, performing circulating treatment on the comprehensive treatment sewage, and adjusting the feeding amount during pretreatment and comprehensive treatment; and (4) introducing the comprehensively treated sewage into a desulfurization system when the comparison result meets the water quality standard of desulfurization process water.
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| CN202210104538.1A CN114524539A (en) | 2022-01-28 | 2022-01-28 | System and method for reusing sewage discharged from clarification tank in desulfurization process water |
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