CN113248053A - Fly ash leachate treatment system - Google Patents
Fly ash leachate treatment system Download PDFInfo
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- CN113248053A CN113248053A CN202110666453.8A CN202110666453A CN113248053A CN 113248053 A CN113248053 A CN 113248053A CN 202110666453 A CN202110666453 A CN 202110666453A CN 113248053 A CN113248053 A CN 113248053A
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- 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
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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
- 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
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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
- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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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)
Abstract
The invention relates to a fly ash leachate treatment system, which comprises an adjusting tank, a reduction tank, a neutralization tank, a first flocculation tank, a sedimentation tank, an intermediate water tank, a filter and a reuse water tank which are connected in sequence, wherein the sedimentation tank is also connected with a sludge storage tank which is connected with a dehydrator; the recycling water tank is connected with a filter for back flushing, a pipeline between the filter and the middle water tank is provided with a switch valve, a branch pipe is connected between the switch valve and the filter, the branch pipe is connected with a suspended particle recovery tank, a filter membrane is arranged in the suspended particle recovery tank, suspended particles back flushed from the filter are intercepted by the filter membrane, taken out, dried and then put into a first flocculation tank to serve as a flocculation primer, so that a flocculation center is increased, the flocculation effect is enhanced, and the adsorbed suspended particles, colloid and the like are recycled; in addition, the washed suspended particles are adjusted by the reaction of the reduction tank and the neutralization tank and are closer to the bottom liquid property of the percolate during flocculation and precipitation, so the flocculation effect is better.
Description
Technical Field
The invention relates to the technical field of fly ash leachate treatment, in particular to a fly ash leachate treatment system.
Background
The incineration method is one of the currently applied garbage treatment methods in China, fly ash generated by garbage incineration is usually solidified and buried, but fly ash leachate is generated under the flushing of rainwater after the fly ash is buried, the fly ash leachate is wastewater with complex components, usually has indexes such as ammonia nitrogen, total nitrogen, heavy metals, COD and the like, and can be discharged after being treated. In the past, the fly ash leachate is treated in cooperation with the domestic garbage leachate due to the small amount of the fly ash, but nowadays, the garbage incineration power generation technology is mature day by day, the garbage incineration power generation becomes a main stream mode of garbage disposal, even some of the domestic garbage which is buried in the past are dug out and sent to a garbage incineration plant for incineration disposal, and the landfilling of the solidified fly ash products is increased day by day. The conventional synergistic treatment mode cannot meet the treatment of a large amount of fly ash percolate and a small amount of domestic garbage percolate or even the treatment of a large amount of single fly ash percolate. In the prior art, a reduction precipitation method is usually adopted, the leachate is reduced, the pH value is adjusted to precipitate heavy metal ions, a flocculating agent is added to flocculate the precipitate into clusters and remove the clusters, but the discharge index is difficult to reach by conventional treatment when the heavy metal content in the leachate is higher; in addition, the flocculation process can be divided into two stages of rapid mixing and flocculation reaction, but the flocculating agent is usually thrown and sprinkled on the liquid level of the percolate and then uniformly mixed by stirring when actually thrown, and the flocculating agent sinks and diffuses for a certain time, so that the flocculating agent is difficult to rapidly and uniformly disperse in the percolate, a certain influence is caused on the flocculation result, and the heavy metal ions are difficult to completely precipitate.
Disclosure of Invention
The technical problem of the invention is to provide a fly ash leachate treatment system, which ensures that the heavy metal component in the leachate has better removal effect and the flocculant can be rapidly and uniformly dispersed into the leachate.
In order to solve the problems, the invention adopts the technical scheme that: a fly ash leachate treatment system comprises an adjusting tank, a reduction tank, a neutralization tank, a first flocculation tank, a sedimentation tank, an intermediate water tank, a filter and a reuse water tank which are sequentially connected by pipelines, wherein the sedimentation tank is also connected with a sludge storage tank which is connected with a dehydrator; the recycling water tank is connected with a filter for back flushing, a pipeline between the filter and the intermediate water tank is provided with a switch valve, a branch pipe is connected between the switch valve and the filter, the branch pipe is connected with a suspended particle recovery tank, a filter membrane is arranged in the suspended particle recovery tank, suspended particles back flushed from the filter are intercepted by the filter membrane, taken out, dried and put into a first flocculation tank for enhanced flocculation; and switch valves are also arranged at the joints of the other pipelines.
The beneficial effect of adopting above-mentioned technical scheme is: the leachate is pretreated in an adjusting tank and reacts with an added acidified ferrous sulfate solution in a reduction tank to reduce high-valence metal ions into low-valence metal ions; adding a sodium hydroxide solution into the neutralization tank to precipitate heavy metal ions in the leachate; adding an anionic PAM solution as a flocculating agent into the first flocculation tank to flocculate the sediment, so that the sediment can be conveniently precipitated in a sedimentation tank of the next step; separating sludge and water in the sedimentation tank, allowing the sludge to enter a sludge storage tank, drying the sludge by a dehydrator, transporting the sludge out, and allowing the liquid to enter an intermediate water tank for temporary storage; removing suspended particles, colloids and the like in the percolate through a filter, finally entering a reuse water tank, and detecting to reach the standard and discharging; the flocculation process influences mud-water separation, if the flocculation effect is not good, heavy metal ions are incompletely precipitated, and the output index is higher; connecting the recycling water tank with a filter for back flushing, closing a switch valve between the filter and the intermediate water tank and a switch valve between the filter and the recycling water tank, opening a switch valve between the filter and the suspended particle recycling tank, allowing the washed suspended particles to enter the recycling tank and be intercepted by a filter membrane, taking out the suspended particles, drying the suspended particles, putting the dried suspended particles into a first flocculation tank to serve as flocculation primers, increasing flocculation centers, contributing to enhancing flocculation effect, and realizing recycling of adsorbed suspended particles, colloid and the like; in addition, the washed suspended particles are adjusted by the reaction of the reduction tank and the neutralization tank and are closer to the bottom liquid property of the percolate during flocculation and precipitation, so the flocculation effect is better.
As a further optimization of the invention: the first flocculation tank is provided with three-dimensional grid type feeding devices which are uniformly distributed, and the feeding device comprises a feeding device main body, wherein the feeding device main body is formed by staggering a plurality of transverse and longitudinal connecting pipes and is positioned in the first flocculation tank, the transverse connecting pipes are provided with a plurality of feeding holes facing to the center of a grid, and the feeding holes are provided with electromagnetic valves; the feeding device is provided with a vertical first rotating shaft in the center of a grid, the first rotating shaft is provided with a plurality of first stirring paddles at intervals along the axial direction, and the height positions of the first stirring paddles correspond to the height positions of the transverse connecting pipes one by one. .
The beneficial effect of adopting above-mentioned technical scheme is: the main body of the three-dimensional grid type feeding device divides the first flocculation tank into a plurality of small areas, after the electromagnetic valve is opened, a flocculant solution is fed into the small areas through feeding holes and is uniformly distributed in the percolate, and then the flocculant is fully contacted with the percolate under the stirring action of the first stirring paddle; the height positions of the first stirring paddles correspond to the height positions of the transverse connecting pipes one by one, and the stirring effect is enhanced.
As a further optimization of the invention: the three-dimensional grid type feeding device also comprises an installation plate, and the feeding device main body is upwards connected with the installation plate; the mounting plate is uniformly provided with a plurality of second rotating shafts at the periphery of the feeding device main body, and the second rotating shafts are provided with a plurality of second stirring paddles at intervals along the axial direction; the second stirring paddle and the first stirring paddle rotate in opposite directions.
The beneficial effect of adopting above-mentioned technical scheme is: the second stirring paddle is opposite to the first stirring paddle in rotation direction, so that liquid on the peripheral part reversely flows, the probability of mutual collision of particles is increased, and the stirring effect and the flocculation effect are enhanced.
As a further optimization of the invention: the first stirring paddle and the second stirring paddle are both inclined-blade stirring paddles.
The beneficial effect of adopting above-mentioned technical scheme is: the inclined blade type stirring paddle can generate axial liquid flow, so that the upper layer and the lower layer of the liquid in the first flocculation tank mutually flow and fully contact.
As a further optimization of the invention: the feeding device is provided with a timer in signal connection with the first stirring paddle and the second stirring paddle, the second stirring paddle stops rotating according to a timer signal, and the first stirring paddle decelerates according to the timer signal.
The beneficial effect of adopting above-mentioned technical scheme is: when the flocculating agent is just put into the device, the flocculating agent and the percolate are uniformly mixed by rapid stirring to generate a flocculation center, and then the rotation of the peripheral first stirring paddle is stopped, and the rotating speed of the central second stirring paddle is reduced to avoid scattering the formed floc.
As a further optimization of the invention: an electric heating bar is arranged in the first flocculation tank, and the temperature of the first flocculation tank is kept at 20-30 ℃.
The beneficial effect of adopting above-mentioned technical scheme is: flocculation is facilitated at 20-30 ℃ and external temperature interference is avoided.
As a further optimization of the invention: first flocculation vat is equipped with the observation window, even have the unanimous second flocculation vat of internal design behind the first flocculation vat, the second flocculation vat also links to each other with the sedimentation tank.
The beneficial effect of adopting above-mentioned technical scheme is: the flocculation effect in the first flocculation tank is observed through the observation window, if the flocculation effect is still not ideal, the standby second flocculation tank is started, and the flocculation is finished in the second flocculation tank and then the sewage is discharged into a subsequent sedimentation tank.
As a further optimization of the invention: the treatment system is also provided with a sodium hypochlorite storage tank, the sodium hypochlorite storage tank is connected with the intermediate water tank, and the dosage ratio of sodium hypochlorite to percolate is 1: 250.
The beneficial effect of adopting above-mentioned technical scheme is: reducing the content of ammonia nitrogen in the percolate by using sodium hypochlorite; laboratory tests show that the higher the sodium hypochlorite dosage is, the better the ammonia nitrogen removal effect is, and when the dosage ratio of the sodium hypochlorite to the percolate is 1:250, the ammonia nitrogen in the percolate can be basically removed.
As a further optimization of the invention: the filter is connected with a reverse osmosis device which is also connected to a reuse water tank.
The beneficial effect of adopting above-mentioned technical scheme is: the reverse osmosis device has higher treatment cost and is the final guarantee mechanism, if the percolate passing through the filter does not reach the standard, the percolate is removed through the reverse osmosis device and then enters a reuse water tank to wait for back washing or discharging.
Drawings
FIG. 1 is a flow chart of the operation of a fly ash leachate treatment system of the present invention;
FIG. 2 is a schematic structural diagram of a three-dimensional grid type feeding device according to the present invention;
FIG. 3 is a side view of the three-dimensional grid type feeding device of the present invention;
FIG. 4 is a bottom view of the three-dimensional grid type feeding device of the present invention;
the device comprises a feeding device body 1, a feeding hole 2, a first rotating shaft 3, a first stirring paddle 31, a mounting plate 4, a second rotating shaft 5 and a second stirring paddle 51.
Detailed Description
As shown in fig. 1, a fly ash leachate treatment system comprises a regulating tank, a reduction tank, a neutralization tank, a first flocculation tank, a sedimentation tank, an intermediate water tank, a filter and a reuse water tank which are sequentially connected by pipelines, wherein the sedimentation tank is also connected with a sludge storage tank which is connected with a dehydrator; the recycling water tank is connected with a filter for back flushing, a pipeline between the filter and the intermediate water tank is provided with a switch valve, a branch pipe is connected between the switch valve and the filter, the branch pipe is connected with a suspended particle recovery tank, a filter membrane is arranged in the suspended particle recovery tank, suspended particles back flushed from the filter are intercepted by the filter membrane, taken out, dried and put into a first flocculation tank for enhanced flocculation; and switch valves are also arranged at the joints of the other pipelines.
The beneficial effect of adopting above-mentioned technical scheme is: the leachate is pretreated in an adjusting tank and reacts with an added acidified ferrous sulfate solution in a reduction tank to reduce high-valence metal ions into low-valence metal ions; adding a sodium hydroxide solution into the neutralization tank to precipitate heavy metal ions in the leachate; adding an anionic PAM solution as a flocculating agent into the first flocculation tank to flocculate the sediment, so that the sediment can be conveniently precipitated in a sedimentation tank of the next step; separating sludge and water in the sedimentation tank, allowing the sludge to enter a sludge storage tank, drying the sludge by a dehydrator, transporting the sludge out, and allowing the liquid to enter an intermediate water tank for temporary storage; removing suspended particles, colloids and the like in the percolate through a filter, finally entering a reuse water tank, and detecting to reach the standard and discharging; the flocculation process influences mud-water separation, if the flocculation effect is not good, heavy metal ions are incompletely precipitated, and the output index is higher; connecting the recycling water tank with a filter for back flushing, closing a switch valve between the filter and the intermediate water tank and a switch valve between the filter and the recycling water tank, opening a switch valve between the filter and the suspended particle recycling tank, allowing the washed suspended particles to enter the recycling tank and be intercepted by a filter membrane, taking out the suspended particles, drying the suspended particles, putting the dried suspended particles into a first flocculation tank to serve as flocculation primers, increasing flocculation centers, contributing to enhancing flocculation effect, and realizing recycling of adsorbed suspended particles, colloid and the like; in addition, the washed suspended particles are adjusted by the reaction of the reduction tank and the neutralization tank and are closer to the bottom liquid property of the percolate during flocculation and precipitation, so the flocculation effect is better.
As shown in fig. 1-3, the first flocculation tank is provided with three-dimensional grid type feeding devices which are uniformly distributed, and comprises a feeding device main body 1, the feeding device main body 1 is composed of a plurality of transverse and longitudinal connecting pipes which are staggered and positioned in the first flocculation tank, a plurality of feeding holes 2 facing to the center of the grid are formed in the transverse connecting pipes, and electromagnetic valves are arranged at the feeding holes 2; the feeding device is provided with a vertical first rotating shaft 3 in the center of a grid, the first rotating shaft 3 is provided with a plurality of first stirring paddles 31 at intervals along the axial direction, and the height positions of the first stirring paddles 31 correspond to the height positions of the transverse connecting pipes one by one. .
The beneficial effect of adopting above-mentioned technical scheme is: the main body of the three-dimensional grid type feeding device divides the first flocculation tank into a plurality of small areas, after the electromagnetic valve is opened, a flocculant solution is fed into the small areas through the feeding holes 2 and is uniformly distributed in the percolate, and the flocculant is fully contacted with the percolate under the stirring action of the first stirring paddle 31; the height positions of the first stirring paddles correspond to the height positions of the transverse connecting pipes one by one, and the stirring effect is enhanced.
The three-dimensional grid type feeding device also comprises a mounting plate 4, and the feeding device main body 1 is upwards connected with the mounting plate 4; the mounting plate 4 is uniformly provided with a plurality of second rotating shafts 5 at the periphery of the feeding device main body 1, and the second rotating shafts 5 are provided with a plurality of second stirring paddles 51 at intervals along the axial direction; the second paddle 51 rotates in the opposite direction to the first paddle 31.
The beneficial effect of adopting above-mentioned technical scheme is: the second stirring paddle 51 rotates in the opposite direction to the first stirring paddle 31, so that the liquid in the peripheral part flows in the opposite direction, the probability of mutual collision of particles is increased, and the stirring effect and the flocculation effect are enhanced.
The first stirring paddle 31 and the second stirring paddle 51 are both inclined-blade stirring paddles.
The beneficial effect of adopting above-mentioned technical scheme is: the inclined blade type stirring paddle can generate axial liquid flow, so that the upper layer and the lower layer of the liquid in the first flocculation tank mutually flow and fully contact.
The feeding device is provided with a timer in signal connection with the first stirring paddle 31 and the second stirring paddle 51, the second stirring paddle 51 stops rotating according to a timer signal, and the first stirring paddle 31 decelerates according to the timer signal.
The beneficial effect of adopting above-mentioned technical scheme is: when the flocculating agent is just put into the device, the flocculating agent and the percolate are uniformly mixed by rapid stirring to generate a flocculation center, and then the rotation of the peripheral first stirring paddle 31 is stopped, and the rotating speed of the central second stirring paddle 51 is reduced to avoid scattering the formed floc.
An electric heating bar is arranged in the first flocculation tank, and the temperature of the first flocculation tank is kept at 20-30 ℃.
The beneficial effect of adopting above-mentioned technical scheme is: flocculation is facilitated at 20-30 ℃ and external temperature interference is avoided.
First flocculation vat is equipped with the observation window, even have the unanimous second flocculation vat of internal design behind the first flocculation vat, the second flocculation vat also links to each other with the sedimentation tank.
The beneficial effect of adopting above-mentioned technical scheme is: the flocculation effect in the first flocculation tank is observed through the observation window, if the flocculation effect is still not ideal, the standby second flocculation tank is started, and the flocculation is finished in the second flocculation tank and then the sewage is discharged into a subsequent sedimentation tank.
The treatment system is also provided with a sodium hypochlorite storage tank, the sodium hypochlorite storage tank is connected with the intermediate water tank, and the dosage ratio of sodium hypochlorite to percolate is 1: 250.
The beneficial effect of adopting above-mentioned technical scheme is: reducing the content of ammonia nitrogen in the percolate by using sodium hypochlorite; laboratory tests show that the higher the sodium hypochlorite dosage is, the better the ammonia nitrogen removal effect is, and when the dosage ratio of the sodium hypochlorite to the percolate is 1:250, the ammonia nitrogen in the percolate can be basically removed.
The filter is connected with a reverse osmosis device which is also connected to a reuse water tank.
The beneficial effect of adopting above-mentioned technical scheme is: the reverse osmosis device has higher treatment cost and is the final guarantee mechanism, if the percolate passing through the filter does not reach the standard, the percolate is removed through the reverse osmosis device and then enters a reuse water tank to wait for back washing or discharging.
Claims (9)
1. A fly ash leachate treatment system is characterized in that: the device comprises a regulating tank, a reduction tank, a neutralization tank, a first flocculation tank, a sedimentation tank, an intermediate water tank, a filter and a reuse water tank which are sequentially connected by pipelines, wherein the sedimentation tank is also connected with a sludge storage tank which is connected with a dehydrator; the recycling water tank is connected with a filter for back flushing, a pipeline between the filter and the intermediate water tank is provided with a switch valve, a branch pipe is connected between the switch valve and the filter, the branch pipe is connected with a suspended particle recovery tank, a filter membrane is arranged in the suspended particle recovery tank, suspended particles back flushed from the filter are intercepted by the filter membrane, taken out, dried and put into a first flocculation tank for enhanced flocculation; and switch valves are also arranged at the joints of the other pipelines.
2. The fly ash leachate treatment system of claim 1, wherein: the first flocculation tank is provided with three-dimensional grid type feeding devices which are uniformly distributed, and the feeding device comprises a feeding device main body, wherein the feeding device main body is formed by staggering a plurality of transverse and longitudinal connecting pipes and is positioned in the first flocculation tank, the transverse connecting pipes are provided with a plurality of feeding holes facing to the center of a grid, and the feeding holes are provided with electromagnetic valves; the feeding device is provided with a vertical first rotating shaft in the center of a grid, the first rotating shaft is provided with a plurality of first stirring paddles at intervals along the axial direction, and the height positions of the first stirring paddles correspond to the height positions of the transverse connecting pipes one by one.
3. The fly ash leachate treatment system of claim 2, wherein: the three-dimensional grid type feeding device also comprises an installation plate, and the feeding device main body is upwards connected with the installation plate; the mounting plate is uniformly provided with a plurality of second rotating shafts at the periphery of the feeding device main body, and the second rotating shafts are provided with a plurality of second stirring paddles at intervals along the axial direction; the second stirring paddle and the first stirring paddle rotate in opposite directions.
4. The fly ash leachate treatment system of claim 2 or 3, wherein: the first stirring paddle and the second stirring paddle are both inclined-blade stirring paddles.
5. The fly ash leachate treatment system of claim 2 or 3, wherein: the feeding device is provided with a timer in signal connection with the first stirring paddle and the second stirring paddle, the second stirring paddle stops rotating according to a timer signal, and the first stirring paddle decelerates according to the timer signal.
6. The fly ash leachate treatment system of claim 1, wherein: an electric heating bar is arranged in the first flocculation tank, and the temperature of the first flocculation tank is kept at 20-30 ℃.
7. The fly ash leachate treatment system of any of claims 1 to 5, wherein: first flocculation vat is equipped with the observation window, even have the unanimous second flocculation vat of internal design behind the first flocculation vat, the second flocculation vat also links to each other with the sedimentation tank.
8. The fly ash leachate treatment system of claim 1, wherein: the treatment system is also provided with a sodium hypochlorite storage tank, the sodium hypochlorite storage tank is connected with the intermediate water tank, and the dosage ratio of sodium hypochlorite to percolate is 1: 250.
9. The fly ash leachate treatment system of claim 1, wherein: the filter is connected with a reverse osmosis device which is also connected to a reuse water tank.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110666453.8A CN113248053A (en) | 2021-06-16 | 2021-06-16 | Fly ash leachate treatment system |
| CN202211444695.3A CN115845737A (en) | 2021-06-16 | 2021-06-16 | Three-dimensional grid type feeding device and first flocculation tank comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110666453.8A CN113248053A (en) | 2021-06-16 | 2021-06-16 | Fly ash leachate treatment system |
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| CN202211444695.3A Division CN115845737A (en) | 2021-06-16 | 2021-06-16 | Three-dimensional grid type feeding device and first flocculation tank comprising same |
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| CN113248053A true CN113248053A (en) | 2021-08-13 |
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| CN202110666453.8A Pending CN113248053A (en) | 2021-06-16 | 2021-06-16 | Fly ash leachate treatment system |
| CN202211444695.3A Pending CN115845737A (en) | 2021-06-16 | 2021-06-16 | Three-dimensional grid type feeding device and first flocculation tank comprising same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115448570A (en) * | 2022-09-13 | 2022-12-09 | 温州市环境发展有限公司 | Fly ash leachate sludge treatment system |
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| CN213231857U (en) * | 2020-04-15 | 2021-05-18 | 上海锐从环境科技有限公司 | Water treatment device for kitchen garbage |
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| CN115448570B (en) * | 2022-09-13 | 2024-08-20 | 温州市环境发展有限公司 | Fly ash leachate sludge treatment system |
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| CN115845737A (en) | 2023-03-28 |
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