CN111559809A - Leachate treatment system and method for waste incineration power plant - Google Patents
Leachate treatment system and method for waste incineration power plant Download PDFInfo
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- CN111559809A CN111559809A CN202010441603.0A CN202010441603A CN111559809A CN 111559809 A CN111559809 A CN 111559809A CN 202010441603 A CN202010441603 A CN 202010441603A CN 111559809 A CN111559809 A CN 111559809A
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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
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a percolate treatment system of a refuse incineration power plant and a treatment method thereof, and the percolate treatment system comprises a treatment pool body, wherein the treatment pool body comprises a first neutralization pool, a first filtering pool and a second filtering pool, the top end of the treatment pool body is sequentially provided with the second filtering pool, the first filtering pool and the first neutralization pool in a chiseling way, the top end of the treatment pool body is provided with a stirring mechanism, the treatment pool body is movably provided with a cut-off mechanism, the first filtering pool is internally provided with an active carbon filtering plate, a net frame is arranged in the second filtering pool, the treatment pool body is internally provided with a second neutralization pool, a water pump is arranged in the second neutralization pool, the treatment pool body is provided with a first water guide hole in a chiseling way, the treatment pool body is provided with a second water guide hole in a chiseling way, the treatment pool body is provided with a third water guide hole in a chiseling way, and impurities and calcium and magnesium ions in percolate, and the formed clear liquid is used for washing the garbage pool, so that the utilization rate of the garbage pool is improved, and the use cost of the garbage pool is greatly reduced.
Description
Technical Field
The invention relates to the technical field of leachate treatment, in particular to a leachate treatment system and a leachate treatment method for a waste incineration power plant.
Background
Waste incineration power plant can pile up fermentation with all kinds of rubbish in the garbage pool, and throw in the rubbish after piling the fermentation to the incinerator, utilize the heat energy of its production to generate electricity, because rubbish piles up the fermentation in-process and can produce a large amount of filtration liquid, after solid rubbish in the garbage pool is emptied, need collect the processing to the filtration liquid in the garbage pool, if directly discharge filtration liquid, will cause serious environmental pollution, therefore, waste incineration power plant also needs effectual good filtration liquid of processing when utilizing rubbish to carry out the electricity generation, involve filtration liquid processing system in the processing procedure.
Traditional refuse incineration power plant leachate treatment system is in actual use, and the clear solution that forms after handling the leachate is directly discharged, does not effectively utilize it, not only causes the waste of water resource, has increased its use cost moreover, to this, needs to design a refuse incineration power plant leachate treatment system and processing method.
Disclosure of Invention
The invention aims to provide a leachate treatment system and a leachate treatment method for a waste incineration power plant, which aim to solve the problems that clear liquid formed by leachate treatment is not effectively utilized and the use cost of the treatment system is increased.
In order to solve the above problems, the present invention provides a technical solution:
a leachate treatment system and a treatment method for a waste incineration power plant comprise the following steps.
As a preferred technical scheme of the invention, the device comprises a treatment tank body, wherein the treatment tank body comprises a first neutralization tank, a first filtering tank and a second filtering tank, the top end of the treatment tank body is sequentially provided with the second filtering tank, the first filtering tank and the first neutralization tank in a chiseled mode, the heights of the second filtering tank, the first filtering tank and the first neutralization tank are arranged in a step mode and gradually reduced, a stirring mechanism is movably arranged at the top end of the treatment tank body and at a position corresponding to the first neutralization tank, a cut-off mechanism is movably arranged on the treatment tank body and above the first neutralization tank and is fixedly connected with the stirring mechanism, an activated carbon filter plate is clamped and arranged in the first filtering tank, a screen frame is arranged in the second filtering tank, a second neutralization tank is arranged in the treatment tank body and below the first filtering tank and the second filtering tank in a chiseled mode, diapire fixed mounting has the water pump in the second neutralization pond, it has square opening to excavate on the processing pond body and with the second in the corresponding position in neutralization pond, it has first guiding gutter to excavate on the processing pond body, just in first neutralization pond and the second in the neutralization pond communicate each other through first guiding gutter, it has the second guiding gutter to excavate on the processing pond body, just first neutralization pond communicates each other through the second guiding gutter with first filtering ponds, it has the third guiding gutter to excavate on the processing pond body, just the second filtering ponds communicates each other through the third guiding gutter with first filtering ponds, it has valve regulation and control mouth to excavate on the processing pond body and with the corresponding position in first guiding gutter.
As a preferred technical scheme of the invention, the stirring mechanism comprises a supporting plate, four sliding rods, a motor, a stirring paddle, two sliding chutes and a motor fixing box, the supporting plate is fixedly arranged at the top end of the treating tank body, two sliding grooves are symmetrically cut on the side wall of the supporting plate close to one side of the first neutralization tank, two sliding rods are slidably arranged in the two sliding grooves, a motor fixing box is fixedly arranged at one end of each of the four sliding rods far away from the supporting plate, a motor is fixedly arranged in the motor fixing box, a stirring paddle is fixedly arranged at one end of the output end of the motor, which is close to the first neutralization tank, the stirring paddle is positioned above the first neutralization tank, one side of the motor fixing box far away from the supporting plate is fixedly connected with the intercepting mechanism, and the stirring paddle moves up and down along with the intercepting mechanism and is inserted into the percolate in the first neutralization tank after descending.
According to a preferred technical scheme, the intercepting mechanism comprises an air cylinder, a connecting rod, a spoiler, a clamping groove and an air cylinder fixing box, the air cylinder fixing box is fixedly installed on the side wall of the treatment pool body, the air cylinder is fixedly installed in the air cylinder fixing box, the connecting rod is fixedly installed at one end, close to the first neutralization pool, of the output end of the air cylinder, one end, close to the motor fixing box, of the connecting rod is fixedly connected with the connecting rod, the spoiler is fixedly installed at one end, far away from the motor fixing box, of the connecting rod, the clamping groove is cut in the treatment pool body, the clamping groove and the spoiler are arranged in a corresponding mode, the spoiler is slidably installed in the clamping groove, and the spoiler and the second water guide hole are arranged in a corresponding mode.
As a preferable technical scheme of the invention, four support columns are symmetrically and fixedly installed on the inner bottom wall of the second filtering tank, the net frame is erected at the top ends of the four support columns, a fine sand layer is laid in the second filtering tank, and the bottoms of the four support columns are buried in the fine sand layer.
As a preferred technical scheme of the invention, the first water guide hole is internally and rotatably provided with a ball valve, the top end of the ball valve is fixedly provided with a hand wheel through a threaded rod, and the hand wheel is positioned in the valve regulating and controlling opening.
As a preferred technical scheme of the present invention, one end of the third water guiding hole close to the fine sand layer is provided with a filter screen plug in a clamping manner, the filter screen plug is fixedly sleeved with a rubber sealing ring in the third water guiding hole, and the filter screen plug is tightly clamped with the third water guiding hole through the rubber sealing ring.
As a preferred technical scheme of the present invention, a water conduit is fixedly installed at a water outlet of the water pump, one end of the water conduit, which is far away from the water pump, extends into the clear liquid storage tank from a square opening, the activated carbon filter plate is erected on top ends of two slats fixedly installed on the inner side wall of the first filter tank, and the activated carbon filter plate is located above the second water guiding hole and below the third water guiding hole.
A method for treating leachate of a waste incineration power plant comprises the following steps:
the first step is as follows: pouring the percolate doped with suspended impurities into a screen frame, intercepting the suspended impurities through the screen frame, allowing the percolate to flow into a fine sand layer, and performing primary filtration treatment on the percolate through the fine sand layer to remove large-particle impurities;
the second step is that: the leachate after the large particle impurities are removed is subjected to secondary filtration treatment through the activated carbon filter plate, and the small particle impurities are adsorbed by the activated carbon filter plate, so that the filtration effect is improved;
the third step: after the leachate enters the first neutralization tank, the second water guide hole is closed and blocked by the cut-off mechanism, calcium hydroxide powder is added into the first neutralization tank, and then magnesium ions in the leachate and the calcium hydroxide powder generate neutralization reaction to form magnesium hydroxide particles which are deposited to the bottom of the first neutralization tank, so that the magnesium ions in the leachate are effectively removed;
the fourth step: opening the ball valve, allowing the leachate in the first neutralization tank to enter a second neutralization tank, adding sodium carbonate powder into the second neutralization tank, and then allowing calcium ions in the leachate to generate neutralization reaction with the sodium carbonate powder and form calcium carbonate particle sediment, thereby effectively removing the calcium ions in the leachate;
the fifth step: the clear liquid of taking out calcium magnesium ion in with the second neutralization pond through the water pump is along aqueduct suction clear liquid storage pool in for wash rubbish pond and handle the pond body, improve the utilization ratio of the clear liquid that forms after the leachate treatment.
The invention has the beneficial effects that:
1. according to the invention, suspended matters and magazines doped in the percolate are filtered by the first filtering tank and the second filtering tank, the percolate with impurities removed is subjected to neutralization reaction in the first neutralizing tank and the second neutralizing tank, clear liquid is finally formed in the second neutralizing tank, and the clear liquid is pumped into the clear liquid storage tank by the water pump for cleaning the garbage tank and the treatment tank body, so that waste of water resources caused by direct discharge of the clear liquid is avoided, the garbage tank and the treatment tank body are not required to be washed by other clean water sources, and the use cost is greatly reduced.
2. According to the invention, magnesium ions in the leachate can be neutralized through the first neutralization tank, magnesium hydroxide particle precipitates are formed, calcium ions in the leachate are neutralized in the second neutralization tank, calcium carbonate particle precipitates are formed, and after the calcium and magnesium ions are effectively removed, the calcium and magnesium ions can be prevented from forming scale in the water pump and the water guide pipe, the probability of blocking the water pump and the water guide pipe is reduced, and the anti-blocking performance of the water pump is greatly improved.
Description of the drawings:
for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a schematic diagram of the overall structure of the processing system of the present invention;
FIG. 2 is a schematic view of the structure of the treatment tank body according to the present invention;
FIG. 3 is an enlarged schematic view of A of FIG. 1 in accordance with the present invention;
FIG. 4 is an enlarged schematic view of B of FIG. 1 in accordance with the present invention;
fig. 5 is an enlarged schematic view of C of fig. 1 according to the present invention.
In the figure: 1. a treatment tank body; 2. a first neutralization tank; 3. a stirring mechanism; 31. a support plate; 32. a slide bar; 33. a motor; 34. a stirring paddle; 35. a chute; 36. a motor fixing box; 4. a shut-off mechanism; 41. a cylinder; 42. a connecting rod; 43. a spoiler; 44. a card slot; 45. a cylinder fixing box; 5. a first filtration tank; 6. an active carbon filter plate; 7. a screen frame; 8. a second filtration tank; 81. a support pillar; 82. a fine sand layer; 9. a square opening; 10. a water pump; 101. a water conduit; 11. a first water guide hole; 12. a second neutralization tank; 14. a second water guide hole; 15. a third water guide hole; 151. a filter screen plug; 152. a rubber seal ring; 16. a valve regulation port; 161. a ball valve; 162. a handwheel.
The specific implementation mode is as follows:
as shown in fig. 1 to 5, the following technical solutions are adopted in the present embodiment: a leachate treatment system of a refuse incineration power plant and a treatment method thereof comprise a treatment tank body 1, wherein the treatment tank body 1 comprises a first neutralization tank 2, a first filtering tank 5 and a second filtering tank 8, the top end of the treatment tank body 1 is sequentially provided with the second filtering tank 8, the first filtering tank 5 and the first neutralization tank 2 in a chiseled mode, the heights of the second filtering tank 8, the first filtering tank 5 and the first neutralization tank 2 are arranged in a step mode and gradually reduced, a stirring mechanism 3 is movably arranged at the top end of the treatment tank body 1 and at a position corresponding to the first neutralization tank 2, a closure mechanism 4 is movably arranged on the treatment tank body 1 and above the first neutralization tank 2, the closure mechanism 4 is fixedly connected with the stirring mechanism 3, an activated carbon filtering plate 6 is clamped and installed in the first filtering tank 5, a screen frame 7 is arranged in the second filtering tank 8, a second neutralization chiseled tank 12 is arranged in the treatment tank body 1 and below the first filtering tank 5 and the second filtering tank 8, a water pump 10 is fixedly installed on the bottom wall of the second neutralization tank 12, a square opening 9 is drilled on the treatment tank body 1 at a position corresponding to the second neutralization tank 12, a first water guide hole 11 is drilled on the treatment tank body 1, the first neutralization tank 2 and the second neutralization tank 12 are communicated with each other through the first water guide hole 11, a second water guide hole 14 is drilled on the treatment tank body 1, the first neutralization tank 2 and the first filtering tank 5 are communicated with each other through the second water guide hole 14, a third water guide hole 15 is drilled on the treatment tank body 1, the second filtering tank 8 and the first filtering tank 5 are communicated with each other through the third water guide hole 15, a valve regulation and control port 16 is drilled on the treatment tank body 1 at a position corresponding to the first water guide hole 11, suspended impurities in the percolate are effectively removed through a net frame 7, and large particles in the percolate can be filtered through a fine sand layer 82, the active carbon filter plate 6 can absorb and filter the small particle impurities in the percolate, secondary filtering treatment is carried out, the filtering effect is effectively improved, the magnesium ions in the leachate can be neutralized by the first neutralization tank 2, and magnesium hydroxide particle sediment is formed, so that the magnesium ions in the leachate are effectively removed, can carry out neutralization treatment to the calcium ion in the filtration liquid through second neutralization pond 12, and form calcium carbonate particle and deposit, avoid calcium magnesium ion to form the incrustation scale in water pump 10 and aqueduct 101, reduce its probability of blockking up water pump 10 and aqueduct 101, effectively improve its anti-clogging performance, ensure that water pump 10 can be with the smooth suction of clear liquid in the clear liquid storage tank, conveniently be used for rinsing rubbish pond and processing pond body 1 with the clear liquid, need not to reuse clean water source and wash rubbish pond and processing pond body 1, greatly reduced its use cost.
Wherein, the stirring mechanism 3 comprises a supporting plate 31, four sliding rods 32, a motor 33, a stirring paddle 34, two sliding chutes 35 and a motor fixing box 36, the supporting plate 31 is fixedly arranged at the top end of the treating tank body 1, the side wall of the supporting plate 31 close to one side of the first neutralization tank 2 is symmetrically provided with the two sliding chutes 35, the two sliding chutes 35 are internally and respectively provided with the two sliding rods 32 in a sliding way, one ends of the four sliding rods 32 far away from the supporting plate 31 are jointly and fixedly provided with the motor fixing box 36, the motor 33 is fixedly arranged in the motor fixing box 36, one end of the output end of the motor 33 close to the first neutralization tank 2 is fixedly provided with the stirring paddle 34, the stirring paddle 34 is positioned above the first neutralization tank 2, one side of the motor fixing box 36 far away from the supporting plate 31 is fixedly connected with the intercepting mechanism 4, and the stirring paddle 34 moves up and down along with the intercepting mechanism 4 and is inserted, the motor 33 drives the stirring paddle 34 to rotate, and the leachate in the first neutralization tank 2 is stirred, so that the efficiency of neutralization reaction of magnesium ions and calcium hydroxide powder in the leachate is improved.
Wherein, the cut-off mechanism 4 comprises an air cylinder 41, a connecting rod 42, a spoiler 43, a clamping groove 44 and an air cylinder fixing box 45, the air cylinder fixing box 45 is fixedly arranged on the side wall of the treatment pool body 1, the air cylinder 41 is fixedly arranged in the air cylinder fixing box 45, the connecting rod 42 is fixedly arranged at one end of the output end of the air cylinder 41 close to the first neutralization pool 2, one end of the connecting rod 42 close to the motor fixing box 36 is fixedly connected with the connecting rod, the spoiler 43 is fixedly arranged at one end of the connecting rod 42 far away from the motor fixing box 36, the clamping groove 44 is cut in the treatment pool body 1, the clamping groove 44 is arranged corresponding to the spoiler 43, the spoiler 43 is slidably arranged in the clamping groove 44, the spoiler 43 is arranged corresponding to the position of the second water guide hole 14, the connecting rod 42 is driven by the air cylinder 41 to move up and down, and then the spoiler 43, the linkage effect is achieved, a driving device does not need to be installed to drive the motor fixing box 36 to move up and down, and energy consumption is reduced.
Wherein, the inner bottom wall symmetry fixed mounting of second filtering ponds 8 has four support columns 81, and the top of four support columns 81 is erect to net frame 7, has laid fine sand layer 82 in the second filtering ponds 8, and the bottom of four support columns 81 buries in fine sand layer 82, can carry out effective filtration to the large granule impurity in the filtration liquid through fine sand layer 82.
Wherein, a ball valve 161 is rotatably mounted in the first water guide hole 11, a hand wheel 162 is fixedly mounted at the top end of the ball valve 161 through a threaded rod, the hand wheel 162 is located in the valve control port 16, and the opening and closing of the first water guide hole 11 are conveniently controlled through the ball valve 161.
Wherein, the filter screen stopper 151 is installed to the one end block that third water guide hole 15 is close to fine sand layer 82, on the filter screen stopper 151 and lie in the third water guide hole 15 internal fixation and cup jointed rubber seal 152, and filter screen stopper 151 passes through rubber seal 152 and the inseparable joint in third water guide hole 15, can prevent through filter screen stopper 151 that fine sand from getting into third water guide hole 15 in, improves its anti-blocking performance.
Wherein, water pump 10's outlet fixed mounting has aqueduct 101, and the one end that water pump 10 was kept away from to aqueduct 101 extends to in the clear liquid storage tank from square opening 9, activated carbon filter plate 6 erects the top of two slats of 5 inside wall fixed mounting of first filtering ponds, activated carbon filter plate 6 is located the top of second guiding water hole 14, and is located the below of third guiding water hole 15, store in storing the clear liquid storage tank with the clear liquid suction through water pump 10, ensure that the clear liquid can be used for wasing rubbish pond and processing pond body 1, effectively reduce its use cost.
A method for treating leachate of a waste incineration power plant comprises the following steps:
the first step is as follows: pouring the percolate doped with suspended impurities into a screen frame 7, intercepting the suspended impurities through the screen frame 7, allowing the percolate to flow into a fine sand layer 82, and performing primary filtration treatment on the percolate through the fine sand layer 82 to remove large-particle impurities;
the second step is that: the leachate after the large particle impurities are removed is subjected to secondary filtration treatment through the activated carbon filter plate 6, and the small particle impurities are adsorbed by the activated carbon filter plate 6, so that the filtration effect is improved;
the third step: after the leachate enters the first neutralization tank 2, the second water guide hole 14 is closed and blocked by the cut-off mechanism 4, calcium hydroxide powder is put into the first neutralization tank 2, and then magnesium ions in the leachate and the calcium hydroxide powder generate neutralization reaction to form magnesium hydroxide particles and precipitate to the bottom of the first neutralization tank 2, so that the magnesium ions in the leachate are effectively removed;
the fourth step: opening the ball valve 161, allowing the leachate in the first neutralization tank 2 to enter the second neutralization tank 12, adding sodium carbonate powder into the second neutralization tank 12, and then allowing calcium ions in the leachate and the sodium carbonate powder to generate neutralization reaction and form calcium carbonate particle sediment, thereby effectively removing the calcium ions in the leachate;
the fifth step: the clear liquid with calcium and magnesium ions taken out from the second neutralization tank 12 is pumped into the clear liquid storage tank along the water guide pipe 101 through the water pump 10, so that the waste tank and the treatment tank body 1 are cleaned, and the utilization rate of the clear liquid formed after the leachate treatment is improved.
The using state of the invention is as follows: firstly, the percolate doped with a large amount of suspended impurities is poured into the net frame 7, the suspended impurities are intercepted by the net frame 7, the percolate with the suspended impurities removed is prevented from falling to the bottom of the second filtering tank 8 along with the percolate, and the suspended impurities are concentrated in the net frame 7, so that the collection treatment is convenient, the percolate with the suspended impurities removed permeates the net frame 7 and flows to the fine sand layer 82, the large-particle impurities in the percolate can be filtered by the fine sand layer 82, then the percolate with the large-particle impurities removed flows into the first filtering tank 5 along the third water guide hole 15, as the filter screen plug 151 is arranged at one end of the third water guide hole 15 close to the fine sand layer 82, the fine sand can be prevented from entering the third water guide hole 15 to block the percolate, and after the percolate enters the first filtering tank 5, the small-particle impurities doped in the percolate can be adsorbed and filtered by the activated carbon filter plate 6, the connecting rod 42 is driven to move upwards by the cylinder 41, and then the flow blocking plate 43 is driven to slide upwards along the clamping groove 44, at the moment, the second water guide hole 14 is opened, and then the percolate in the first filtering tank 5 flows into the first neutralizing tank 2 along the second water guide hole 14, when the liquid level of the percolate in the first neutralizing tank 2 is close to the second water guide hole 14, the flow blocking plate 43 is driven to move downwards by the cylinder 41 again, and the second water guide hole 14 is blocked, so that the percolate in the first neutralizing tank 2 is prevented from flowing back into the first filtering tank 5, when the connecting rod 42 is driven by the cylinder 41 to move downwards, the motor fixing box 36 and the sliding rod 32 fixedly arranged on the side wall thereof can be driven to slide downwards along the two sliding grooves 35, then the stirring paddle 34 is inserted into the percolate, the stirring paddle 34 is driven to rotate by the motor 33, at the moment, calcium hydroxide powder is manually added into the first neutralizing tank 2, then the magnesium ions in the leachate and calcium hydroxide generate neutralization reaction, the neutralization efficiency of calcium hydroxide powder and the magnesium ions in the leachate can be improved through the rotating stirring paddle 34, magnesium hydroxide particles are formed to be deposited to the bottom of the first neutralization tank 2, the magnesium ions in the leachate are effectively removed, then an operator extends a hand into the valve regulating port 16 and rotates the hand wheel 162, then the ball valve 161 is driven to rotate and open the first water guide hole 11, the leachate from which the magnesium ions are removed flows into the second neutralization tank 12 along the first water guide hole 11, when the liquid level of the leachate in the second neutralization tank 12 is close to the first water guide hole 11, the operator rotates the ball valve 161 and closes the first water guide hole 11 to avoid backflow of the leachate, then the operator puts sodium carbonate powder into the second neutralization tank 12 from the square opening 9, and then the calcium ions in the leachate and the sodium carbonate generate neutralization reaction, generate calcium carbonate particle sediment, after getting rid of calcium magnesium ion, can be through water pump 10 with the clear liquid in the second neutralization pond 12 along aqueduct 101 suction clear liquid storage tank in, the clear liquid that utilizes to store can wash empty rubbish pond and treatment pond body 1, reduce the waste of water resource, need not to use other clean water sources to wash rubbish pond and treatment pond body 1, greatly reduced processing system's use cost, simultaneously through secondary filter treatment, and carry out calcium magnesium ion to filtration liquid in first neutralization pond 2 and second neutralization pond 12 and get rid of, after the clear liquid that forms got into water pump 10 and aqueduct 101, can prevent that calcium magnesium ion from forming the incrustation scale and causing the jam to water pump 10 and aqueduct 101, its anti-clogging performance has been improved greatly.
While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (8)
1. The utility model provides a refuse incineration power plant leachate treatment system which characterized in that: comprises a treatment tank body (1), wherein the treatment tank body (1) comprises a first neutralization tank (2), a first filtering tank (5) and a second filtering tank (8), the top end of the treatment tank body (1) is sequentially provided with the second filtering tank (8), the first filtering tank (5) and the first neutralization tank (2), the heights of the second filtering tank (8), the first filtering tank (5) and the first neutralization tank (2) are in stepped arrangement and gradually reduced, a stirring mechanism (3) is movably arranged at the top end of the treatment tank body (1) and at a position corresponding to the first neutralization tank (2), a flow stopping mechanism (4) is movably arranged above the treatment tank body (1) and located in the first neutralization tank (2), the flow stopping mechanism (4) is fixedly connected with the stirring mechanism (3), and an active carbon filter plate (6) is installed in the first filtering tank (5) in a clamping manner, the net frame (7) is placed in the second filtering tank (8), a second neutralization tank (12) is arranged in the processing tank body (1) and below the first filtering tank (5) and the second filtering tank (8), a water pump (10) is fixedly installed on the bottom wall in the second neutralization tank (12), a square opening (9) is formed in the processing tank body (1) and in the position corresponding to the second neutralization tank (12), a first water guide hole (11) is formed in the processing tank body (1), the first neutralization tank (2) and the second neutralization tank (12) are communicated with each other through the first water guide hole (11), a second water guide hole (14) is formed in the processing tank body (1), the first neutralization tank (2) and the first filtering tank (5) are communicated with each other through the second water guide hole (14), and a third water guide hole (15) is formed in the processing tank body (1), and the second filtering tank (8) is communicated with the first filtering tank (5) through a third water guide hole (15), and a valve regulating port (16) is arranged on the treatment tank body (1) and at a position corresponding to the first water guide hole (11).
2. The leachate treatment system of a waste incineration power plant according to claim 1, wherein: the stirring mechanism (3) comprises a supporting plate (31), four sliding rods (32), a motor (33), a stirring paddle (34), two sliding grooves (35) and a motor fixing box (36), wherein the supporting plate (31) is fixedly installed at the top end of the treatment pool body (1), the supporting plate (31) is symmetrically provided with the two sliding grooves (35) on the side wall close to one side of the first neutralization pool (2), the two sliding rods (32) are arranged in the two sliding grooves (35) in a sliding mode, the motor fixing box (36) is fixedly installed at one end, far away from the supporting plate (31), of each sliding rod (32) together, the motor (33) is fixedly installed in the motor fixing box (36), the stirring paddle (34) is fixedly installed at one end, close to the first neutralization pool (2), of the output end of the motor (33), and the stirring paddle (34) is located above the first neutralization pool (2), one side of the motor fixing box (36) far away from the supporting plate (31) is fixedly connected with the interception mechanism (4), and the stirring paddle (34) moves up and down along with the interception mechanism (4) and is inserted into percolate in the first neutralization pond (2) after descending.
3. The leachate treatment system of a waste incineration power plant according to claim 1, wherein: the intercepting mechanism (4) comprises an air cylinder (41), a connecting rod (42), a spoiler (43), a clamping groove (44) and an air cylinder fixing box (45), the cylinder fixing box (45) is fixedly arranged on the side wall of the treatment pool body (1), an air cylinder (41) is fixedly arranged in the air cylinder fixing box (45), a connecting rod (42) is fixedly arranged at one end of the output end of the air cylinder (41) close to the first neutralization tank (2), one end of the connecting rod (42) close to the motor fixing box (36) is fixedly connected with the motor fixing box, one end of the connecting rod (42) far away from the motor fixing box (36) is fixedly provided with a spoiler (43), the clamping groove (44) is cut in the treatment pool body (1), the clamping groove (44) and the spoiler (43) are arranged correspondingly, the spoiler (43) is arranged in the clamping groove (44) in a sliding way, and the spoiler (43) is arranged corresponding to the position of the second water guide hole (14).
4. The leachate treatment system of a waste incineration power plant according to claim 1, wherein: the interior diapire symmetry fixed mounting of second filtering ponds (8) has four support columns (81), just net frame (7) erect the top of locating four support columns (81), fine sand layer (82) have been laid in second filtering ponds (8), and the bottom of four support columns (81) buries in fine sand layer (82).
5. The leachate treatment system of a waste incineration power plant according to claim 1, wherein: ball valve (161) are installed in first water guide hole (11) internal rotation, threaded rod fixed mounting has hand wheel (162) on the top of ball valve (161), just hand wheel (162) are located valve regulation and control mouth (16).
6. The leachate treatment system of a waste incineration power plant according to claim 1, wherein: filter screen stopper (151) is installed to third water guide hole (15) one end block near fine sand layer (82), filter screen stopper (151) are gone up and are located fixed cover in third water guide hole (15) and have connect rubber seal (152), just filter screen stopper (151) are through the inseparable joint of rubber seal (152) with third water guide hole (15).
7. The leachate treatment system of a waste incineration power plant according to claim 1, wherein: the water inlet of the water pump (10) is submerged in the clear liquid in the second neutralization pond (12), the water outlet of the water pump (10) is fixedly provided with a water guide pipe (101), and one end, far away from the water pump (10), of the water guide pipe (101) extends into the clear liquid storage pond.
8. The method for treating leachate from a waste incineration power plant according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
the first step is as follows: pouring the percolate doped with suspended impurities into a screen frame (7), intercepting the suspended impurities through the screen frame (7), allowing the percolate to flow into a fine sand layer (82), and performing primary filtration treatment on the percolate through the fine sand layer (82) to remove large-particle impurities;
the second step is that: the leachate after the large particle impurities are removed is subjected to secondary filtration treatment through the activated carbon filter plate (6), and the small particle impurities are adsorbed by the activated carbon filter plate (6), so that the filtration effect is improved;
the third step: after the leachate enters the first neutralization tank (2), the second water guide hole (14) is blocked by the cut-off mechanism (4), calcium hydroxide powder is added into the first neutralization tank (2), and then magnesium ions in the leachate and the calcium hydroxide powder generate neutralization reaction to form magnesium hydroxide particles and precipitate to the bottom of the first neutralization tank (2), so that the magnesium ions in the leachate are effectively removed;
the fourth step: opening a ball valve (161), allowing the leachate in the first neutralization tank (2) to enter a second neutralization tank (12), adding sodium carbonate powder into the second neutralization tank (12), and then allowing calcium ions in the leachate and the sodium carbonate powder to generate a neutralization reaction and form calcium carbonate particle precipitates, thereby effectively removing the calcium ions in the leachate;
the fifth step: the clear liquid which takes out calcium and magnesium ions in the second neutralization pond (12) is pumped into the clear liquid storage pond along the water guide pipe (101) through the water pump (10) and is used for cleaning the garbage pond and the treatment pond body (1), so that the utilization rate of the clear liquid formed after the leachate treatment is improved, and the use cost of the treatment system is effectively reduced.
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Application publication date: 20200821 |