CN110844989A - Dosing device and dosing method for leachate pretreatment system - Google Patents
Dosing device and dosing method for leachate pretreatment system Download PDFInfo
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- CN110844989A CN110844989A CN201911287931.3A CN201911287931A CN110844989A CN 110844989 A CN110844989 A CN 110844989A CN 201911287931 A CN201911287931 A CN 201911287931A CN 110844989 A CN110844989 A CN 110844989A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 104
- 238000006243 chemical reaction Methods 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 25
- 238000004062 sedimentation Methods 0.000 claims abstract description 20
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 19
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 19
- 235000011116 calcium hydroxide Nutrition 0.000 claims abstract description 19
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 19
- 150000001768 cations Chemical class 0.000 claims abstract description 17
- 239000007787 solid Substances 0.000 claims abstract description 17
- 239000003814 drug Substances 0.000 claims abstract description 13
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims abstract description 9
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- 230000014759 maintenance of location Effects 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 5
- 238000005345 coagulation Methods 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 claims description 4
- 239000000701 coagulant Substances 0.000 abstract description 4
- 239000008394 flocculating agent Substances 0.000 abstract description 4
- 240000006909 Tilia x europaea Species 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
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- 239000000149 chemical water pollutant Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
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- 238000002306 biochemical method Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000003311 flocculating effect Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
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- 238000000855 fermentation Methods 0.000 description 1
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- 230000005484 gravity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
- B01F33/811—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles in two or more consecutive, i.e. successive, mixing receptacles or being consecutively arranged
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F2103/06—Contaminated groundwater or leachate
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a dosing device and a dosing method of a leachate pretreatment system, which comprise a leachate water inlet valve (1), a slaked lime powder feeding device (2), a first mixing stirrer (3), a second mixing stirrer (4), a polymeric ferric sulfate feeding device (5), a PAM cation feeding device (6), a first mixing reaction tank (7), a second mixing reaction tank (8) and a water outlet sedimentation tank (9). The invention adopts the combined addition of different coagulants and flocculants and carries out the addition of the medicament at different positions by controlling the rotating speed of the mixing stirrer, so that the removal efficiency of solid suspended matters and hardness in the leachate is obviously improved.
Description
Technical Field
The invention relates to the field of landfill leachate treatment process, and improves the hardness and the removal efficiency of suspended solid in leachate through the synergistic action of a coagulation medicament and a flocculation medicament in a pretreatment process section.
Background
In the design of the household garbage incineration power plant, household garbage is stored in a garbage pit for 3-8 days, and after certain fermentation and dehydration, the heat value is obviously improved, so that the addition of auxiliary fuel is reduced, the power generation capacity is increased, and the efficiency of the garbage incineration power plant is improved. But also generates the problem of leachate waste water, and the landfill leachate has the characteristics of complex and variable pollutant components, large water quality change, high organic pollutant concentration (CODcr concentration), high hardness, heavy metal and solid suspended matter content, large water quantity fluctuation and the like. With the continuous improvement of environmental protection requirements and the stricter of discharge standards, the percolate treatment process is gradually upgraded and optimized from the initial physical and chemical method and biochemical method into a combined process of the physical and chemical method, the biochemical method and the membrane method. At present, the treatment process of leachate in domestic waste incineration plants mainly comprises pretreatment, regulating tank, anaerobic treatment, two-stage A/O, external ultrafiltration membrane, NF and RO, wherein the concentrated solution is reduced by softening and DTRO and then is sent to other water consumption points in plants such as lime slurry preparation and the like for consumption. The treatment process is mature in application, high in reliability and widely applied to various waste incineration projects. However, due to the high content of solid suspended substances and hardness in the leachate, the following problems generally exist in the industry: (1) the tank body is large in silt removal amount, because the content of suspended solid in percolate is high (generally 6000 mg/L-12000 mg/L), in view of the requirement of stable operation, the desilting overhaul work of each tank body is required to be carried out every 2-3 years of operation of a general percolate treatment system, a 300t/d treatment scale percolate treatment system is taken as an example, the total silt removal amount of sludge from a regulating tank, an anaerobic tank and a nitrification tank is generally not lower than 200 tons, silt needs to be packed and transported in batches to a refuse dump for incineration treatment, the personnel operation intensity is very high, and the anaerobic tank is inflammable and explosive due to methane generation, hydrogen sulfide, ammonia gas and the like, toxic gas and the operation difficulty and safety measure requirements of the desilting work are further improved. (2) The scale formation condition of the system is serious, the hardness content in the percolate is high (generally 3000 mg/L-8000 mg/L), along with the passing of the operation time, the overflowing part of the equipment (particularly the inside of a pump shell and an impeller) can be gradually scaled in the pipeline inside the system, the performance of the equipment is reduced, the inner diameter of the pipeline inside the system is reduced, the pipeline is blocked, the flowmeter is out of alignment, and the like.
Disclosure of Invention
Aiming at the practical problems in the operation, the invention aims to provide a dosing device and a dosing method for a leachate pretreatment system, which are used for creating ideal reaction conditions by adding different coagulants and flocculants in a combined manner and controlling the rotating speed of a mixing stirrer, improving the removal efficiency of solid suspended matters and hardness in leachate, relieving the sludge deposition and system scaling conditions of the leachate treatment system and improving the stability of the system in operation.
The specific technical scheme of the invention is as follows: a dosing device of a leachate pretreatment system comprises a leachate inlet valve 1, a slaked lime powder feeding device 2, a first mixing stirrer 3, a second mixing stirrer 4, a polymeric ferric sulfate feeding device 5, a PAM cation feeding device 6, a first mixing reaction tank 7, a second mixing reaction tank 8 and an effluent sedimentation tank 9; the percolate pipeline is communicated with the effluent sedimentation tank 9 through the water inlet valve 1, the first mixing reaction tank 7, the second mixing reaction tank 8 in sequence; the first mixing reaction tank 7 and the second mixing reaction tank 8 are communicated with each other at the lower parts of the two reaction tanks for water passing, the first mixing reaction tank 7 and the second mixing reaction tank 8 are respectively and correspondingly provided with a first mixing stirrer 3 and a second mixing stirrer 4, and the first mixing reaction tank 7 is provided with a feed inlet communicated with a slaked lime powder feeding device 2; and the second mixing reaction tank 8 is provided with a feed inlet communicated with a polyferric sulfate feeding device 5 and a feed inlet communicated with a PAM cation feeding device 6.
The invention also provides a dosing method of the leachate pretreatment system, the dosing device is adopted, the water inlet valve 1 is opened, the leachate passes through the water inlet valve 1 in a leachate pipeline, slaked lime powder is fed by the slaked lime powder feeding device 2, the slaked lime powder sequentially flows through the first mixing reaction tank 7, the second mixing reaction tank 8 and the effluent sedimentation tank 9, the first mixing reaction tank 7 and the second mixing reaction tank 8 are respectively and correspondingly stirred by the first mixing stirrer 3 and the second mixing stirrer 4 under the stirring action of the mixing stirrers with different rotating speeds, and the polymeric ferric sulfate feeding device 5 and the PAM feeding device 6 are arranged in the second mixing reaction tank 8; and the solid suspended substances and the hardness concentration of the final effluent sedimentation tank 9 are greatly reduced after the coagulation reaction with different component medicaments.
Above-mentioned throw with hydrated lime powder in first mixing retort 7, throw simultaneously polyferric sulfate and PAM cation at second mixing retort 8 to the rotational speed of first mixing agitator 3 and second mixing agitator 4 is controlled, guarantees that filtration liquid and medicament intensive mixing react, makes the efficiency of getting rid of filtration liquid suspended solid and hardness show and improves.
Different from the traditional concrete type mixing reaction tank, the mixing reaction tank and the effluent sedimentation tank are all made of carbon steel Q235 materials, the interior of the tank body is subjected to anticorrosion treatment by epoxy resin, the corrosion of a steel structure by leachate can be effectively avoided, and the exterior of the tank body is coated with anticorrosion paint. The height-diameter ratio of the first mixing reaction tank 7 to the second mixing reaction tank 8 is 7: 6, the depth of the mixing stirrer inserted into the tank body is about 3/4 of the total height, the lower parts of the first mixing reaction tank 7 and the second mixing reaction tank 8 are communicated to realize the water passing function, the hydraulic retention time of the two reaction tanks is 1.5h, the horizontal angle of the conical hopper of the effluent sedimentation tank is 65 degrees, and the surface hydraulic load is 0.75m3/(m2H), too high a residence time and too low a surface load both lead to an increase in investment costs,and the effect is not obviously increased.
In principle, the landfill leachate firstly enters a first mixing reaction tank 7, slaked lime powder is added into the first mixing reaction tank 7, the first mixing reaction tank is fully stirred under the action of a first mixing stirrer 3, sufficient reaction time is ensured to ensure that the leachate and the lime powder fully react, and a lime softening method is one of medicament softening methods and is used for removing calcium and magnesium hardness by using carbonate generated by the reaction of hydroxyl and alkalinity in water and directly removing iron hardness by using the hydroxyl. After the leachate and the lime powder are fully mixed and reacted, the leachate enters a second mixing reaction tank 8, and is fully stirred under the action of a second mixing stirrer 4, so that sufficient reaction time is ensured to ensure that the leachate fully reacts with polyferric sulfate and PAM cations. Polyferric sulfate is an inorganic flocculant and PAM cation organic flocculant to generate synergistic effect in leachate, so that a compressed double electric layer is generated, solid suspended particles in the leachate lose stability, colloidal particles are mutually condensed to increase the particles, and floccules and alumen ustum are formed. After the flocculating constituent grows to a certain volume, the flocculating constituent is separated from the water phase and precipitated under the action of gravity, thereby removing a large amount of suspended matters in the percolate and achieving the effect of solid-liquid separation. Finally, the hardness and the solid suspended matters of the percolate precipitated by the effluent precipitation tank 9 are greatly removed.
In order to more clearly illustrate the technical solution of the present invention, the following brief description is made on the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a dosing device of a leachate pretreatment system.
In the figure: 1. a water inlet valve; 2. a slaked lime powder feeding device; 3. a first mixing agitator; 4. a second mixing agitator; 5. a polymeric ferric sulfate feeding device; 6. a PAM cation feeding device; 7. a first mixing reaction tank; 8. a second mixing reaction tank; 9. and (4) discharging from a water sedimentation tank.
Detailed Description
The embodiment of the invention provides a dosing device of a leachate pretreatment system of a household garbage incineration plant, which comprises a water inlet valve 1, a slaked lime powder feeding device 2, a first mixing stirrer 3, a second mixing stirrer 4, a polyferric sulfate feeding device 5, a PAM cation feeding device 6, a first mixing reaction tank 7, a second mixing reaction tank 8 and a water outlet sedimentation tank 9, wherein the slaked lime powder feeding device 2 is arranged in the leachate pretreatment system; opening a water inlet valve 1, adding slaked lime powder into percolate through the water inlet valve 1 by using a slaked lime powder adding device 2, sequentially flowing through a first mixing reaction tank 7, a second mixing reaction tank 8 and an effluent sedimentation tank 9, respectively and correspondingly adopting a first mixing stirrer 3 and a second mixing stirrer 4 to stir in the first mixing reaction tank 7 and the second mixing reaction tank 8 under the stirring action of mixing stirrers with different rotating speeds, and adding a polyferric sulfate adding device 5 and a PAM cation adding device 6 into the second mixing reaction tank 8; and the solid suspended substances and the hardness concentration of the final effluent sedimentation tank 9 are greatly reduced after the coagulation reaction with different component medicaments.
Above-mentioned throw with hydrated lime powder in first mixing retort 7, throw simultaneously polyferric sulfate and PAM cation at second mixing retort 8 to the rotational speed of first mixing agitator 3 and second mixing agitator 4 is controlled, guarantees that filtration liquid and medicament intensive mixing react, makes the efficiency of getting rid of filtration liquid suspended solid and hardness show and improves.
Specifically, the leachate firstly enters a first mixing reaction tank 7, the rotating speed of a first mixing stirrer 3 is controlled at 85r/min, a slaked lime powder adding device 2 is started, lime powder with the content of 90% is added, the retention time is controlled at 1.5h, if the retention time is too short, the medicament is not uniformly mixed and is difficult to form large flocs, if the retention time is too long, the formed flocs can be broken, the treatment effect is influenced, when the adding amount of the lime powder reaches the concentration of 3.2g/L, the hardness in the leachate reaches the lowest, and the removal rate is 73.5%; the leachate mixed liquor after the lime powder reaction enters a second mixing reaction tank 8 through a water hole at the lower part of a first mixing reaction tank 7, a second mixing stirrer 4 is started in advance, the rotating speed is controlled to be 35r/min, a polymeric ferric sulfate adding device 5 and a PAM cation adding device 6 are started simultaneously, the retention time is controlled to be 1.5h, and when the adding amount of polymeric ferric sulfate is controlled to be 200mg/L and the PAM cation is controlled to be 3mg/L, the polymeric ferric sulfate inorganic flocculant and the PAM cation organic flocculant generate ideal synergy in the leachateAnd the removal rate of solid suspended substances reaches the highest. The final sedimentation in the effluent sedimentation tank 9 has obvious layering effect, and the hydraulic load on the surface of the effluent sedimentation tank 9 is controlled to be 0.75m3/(m2H), the suspended matters and impurities are deposited at the bottom of the effluent sedimentation tank 9, and the supernatant is taken to measure that the removal rate of the suspended matters reaches 92.7 percent and the removal rate of the hardness reaches 73.5 percent. According to the invention, through the combined addition of different coagulants and flocculants, under the condition that the addition amount of different component medicaments and the rotating speed of the mixing stirrer are determined, the medicaments fully react with the percolate, so that a better effect of removing solid suspended matters and hardness is finally realized, and the stable operation of a percolate system can be further ensured. The removal rate is shown in Table 1:
TABLE 1 Effect contrast table with traditional medicine-adding device
The invention adopts the combined addition of different coagulants and flocculants and carries out the addition of the medicament at different positions by controlling the rotating speed of the mixing stirrer, so that the removal efficiency of solid suspended matters and hardness in the leachate is obviously improved.
Claims (9)
1. A dosing device of a leachate pretreatment system is characterized by comprising a leachate water inlet valve (1), a slaked lime powder feeding device (2), a first mixing stirrer (3), a second mixing stirrer (4), a polyferric sulfate feeding device (5), a PAM cation feeding device (6), a first mixing reaction tank (7), a second mixing reaction tank (8) and a water outlet sedimentation tank (9); the leachate pipeline is communicated with the effluent sedimentation tank (9) through the water inlet valve (1), the first mixing reaction tank (7), the second mixing reaction tank (8) in sequence; the first mixing reaction tank (7) and the second mixing reaction tank (8) are communicated with each other at the lower parts of the two reaction tanks for water passing, the first mixing reaction tank (7) and the second mixing reaction tank (8) are respectively and correspondingly provided with a first mixing stirrer (3) and a second mixing stirrer (4), and the first mixing reaction tank (7) is provided with a feed inlet communicated with a slaked lime powder feeding device (2); and the second mixing reaction tank (8) is provided with a feed inlet communicated with a polyferric sulfate feeding device (5) and a feed inlet communicated with a PAM cation feeding device (6).
2. The dosing device for the leachate pretreatment system according to claim 1, wherein the ratio of the height to the diameter of the first mixing reactor (7) to the height to the diameter of the second mixing reactor (8) is 7: 6.
3. the dosing device for percolate pretreatment systems according to claim 1, characterized in that the first mixing stirrer (3) and the second mixing stirrer (4) are inserted into 3/4 corresponding to the total height of the first mixing reaction tank (7) and the second mixing reaction tank (8).
4. A leachate pretreatment system dosing method is characterized in that a dosing device according to claim 1 is adopted, a water inlet valve (1) is opened, leachate passes through the water inlet valve (1) in a leachate pipeline, slaked lime powder is fed by a slaked lime powder feeding device (2), flows through a first mixing reaction tank (7), a second mixing reaction tank (8) and a water outlet sedimentation tank (9) in sequence, a first mixing stirrer (3) and a second mixing stirrer (4) are respectively and correspondingly adopted in the first mixing reaction tank (7) and the second mixing reaction tank (8) to stir under the stirring action of the mixing stirrers with different rotating speeds, and a polymeric ferric sulfate feeding device (5) and a PAM cation feeding device (6) are adopted in the second mixing reaction tank (8); and the solid suspended substances and the hardness concentration of the solid suspended substances in the final effluent sedimentation tank (9) are greatly reduced after the coagulation reaction with different component medicaments.
5. The dosing method for leachate pretreatment system as claimed in claim 4, wherein the rotational speed of the first mixing agitator (3) is controlled at 85r/min, and the retention time of the chemicals is controlled at 1.5 h.
6. The dosing method for the leachate pretreatment system according to claim 4, wherein the amount of lime powder added is controlled to reach a concentration of 3.2 g/L.
7. The dosing method for leachate pretreatment system as claimed in claim 4, wherein the rotational speed of the second mixing agitator (4) is controlled at 35r/min and the retention time of the chemicals is controlled at 1.5 h.
8. The leachate pretreatment system dosing method of claim 4, wherein the dosage of polymeric ferric sulfate is controlled to 200mg/L and the dosage of PAM cation is controlled to 3 mg/L.
9. The dosing method for leachate pretreatment system as claimed in claim 4, wherein the hydraulic load on the surface of the effluent sedimentation tank (9) is controlled at 0.75m3/(m2.h)。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911287931.3A CN110844989A (en) | 2019-12-15 | 2019-12-15 | Dosing device and dosing method for leachate pretreatment system |
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| CN201911287931.3A CN110844989A (en) | 2019-12-15 | 2019-12-15 | Dosing device and dosing method for leachate pretreatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116621387A (en) * | 2023-06-30 | 2023-08-22 | 青岛水务集团有限公司 | Concentrated solution full-quantification treatment system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531244A (en) * | 2010-12-07 | 2012-07-04 | 光大环保科技发展（北京）有限公司 | Pretreatment method of landfill leachate of waste incineration power plant |
| CN211255398U (en) * | 2019-12-15 | 2020-08-14 | 上海康恒环境股份有限公司 | Leachate pretreatment system dosing device |
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- 2019-12-15 CN CN201911287931.3A patent/CN110844989A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531244A (en) * | 2010-12-07 | 2012-07-04 | 光大环保科技发展（北京）有限公司 | Pretreatment method of landfill leachate of waste incineration power plant |
| CN211255398U (en) * | 2019-12-15 | 2020-08-14 | 上海康恒环境股份有限公司 | Leachate pretreatment system dosing device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116621387A (en) * | 2023-06-30 | 2023-08-22 | 青岛水务集团有限公司 | Concentrated solution full-quantification treatment system and method |
| CN116621387B (en) * | 2023-06-30 | 2023-11-14 | 青岛水务集团有限公司 | Concentrated solution full-quantification treatment system and method |
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