CN214936783U - Landfill leachate pretreatment system - Google Patents
Landfill leachate pretreatment system Download PDFInfo
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- CN214936783U CN214936783U CN202121026519.9U CN202121026519U CN214936783U CN 214936783 U CN214936783 U CN 214936783U CN 202121026519 U CN202121026519 U CN 202121026519U CN 214936783 U CN214936783 U CN 214936783U
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Abstract
The utility model discloses a landfill leachate pretreatment system, which comprises a screen filter and a coagulation tank, wherein the coagulation tank is communicated with the water outlet end of the screen filter and is also communicated with a drug outlet of coagulation dosing equipment in a dosing system; the flocculation tank is communicated with the water outlet end of the coagulation tank, and is also communicated with a medicine outlet of flocculation medicine adding equipment in a medicine adding system; the inclined plate sedimentation tank is communicated with the water outlet end of the flocculation tank; the magnetic interception system is communicated with a first water outlet end of the inclined plate sedimentation tank, and a first valve is arranged on the first water outlet end; and the oxidation pond is communicated with the water outlet end of the magnetic interception system, and a third valve is arranged between the oxidation pond and the magnetic interception system. The utility model discloses an integrated and optimization to the technology obtain novel landfill leachate pretreatment systems, obviously improve filtration liquid pretreatment effect, can effectively get rid of pollutants such as suspended solid, heavy metal and ammonia nitrogen in the landfill leachate.
Description
Technical Field
The utility model relates to a sewage treatment device technical field specifically is a landfill leachate pretreatment systems.
Background
The landfill leachate has complex components, high heavy metal content, high chromaticity, high organic matter content, high ammonia nitrogen content and poor biodegradability, and is accompanied by malodor. The landfill leachate is generally required to be pretreated, and if the pretreatment is omitted, the activity of microorganisms in a subsequent biochemical reactor can be reduced due to heavy metal and high-concentration ammonia nitrogen in the leachate, so that the biochemical reaction effect is general. To the system that uses membrane processing technology as advanced treatment process, can lead to membrane jam, membrane pollution problem aggravation, the frequency of washing increases to membrane life shortens for the time, and the running cost increases, and system's play water quality of water is not up to standard, and quality of water is abominable, not only can increase the environmental safety risk, finally may destroy ecosystem.
The prior landfill leachate pretreatment process mainly comprises a precipitation method, a coagulation-flocculation precipitation method, an aeration stripping method, an oxidation method, an advanced oxidation method, an iron-carbon micro-electrolysis method, a combined process method and the like.
The prior landfill leachate pretreatment has the defects that:
(1) the existing landfill leachate pretreatment process mainly aims at removing suspended substances and improving wastewater biodegradability, only considers the removal effect of leachate suspended substances or how to improve the wastewater biodegradability, but rarely comprehensively considers the improvement of the wastewater biodegradability, simultaneously removes metal ions and suspended substance impurities and degrades a part of organic matters.
(2) The existing landfill leachate pretreatment process comprises the following steps: the method has the advantages of large dosage, high cost, high labor intensity and the like, and non-ideal effect, and is easy to cause the problems of scaling, membrane blockage, membrane pollution, unstable effluent quality, difficult normal operation of a biochemical system and the like in a subsequent treatment process.
Therefore, a landfill leachate pretreatment system is provided to solve the problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a landfill leachate pretreatment systems to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a landfill leachate pretreatment systems, including screen filter, still includes:
the coagulation tank is communicated with the water outlet end of the screen filter and is also communicated with a medicine outlet of coagulation medicine adding equipment in a medicine adding system;
the flocculation tank is communicated with the water outlet end of the coagulation tank, and is also communicated with a medicine outlet of flocculation medicine adding equipment in a medicine adding system;
the inclined plate sedimentation tank is communicated with the water outlet end of the flocculation tank;
the magnetic interception system is communicated with a first water outlet end of the inclined plate sedimentation tank, and a first valve is arranged on the first water outlet end;
the oxidation tank is communicated with the water outlet end of the magnetic interception system, and a third valve is arranged between the oxidation tank and the magnetic interception system; a second water outlet end of the sedimentation tank is communicated with the oxidation tank through a pipeline, and a second valve is arranged on the second water outlet end; the oxidation pond is also communicated with oxidation dosing equipment in a dosing system;
the clean water tank is communicated with the water outlet end of the oxidation tank;
and sludge discharge ports of the screen filter, the inclined plate sedimentation tank and the oxidation tank are communicated with a sludge tank.
Preferably, stirrers are respectively arranged in the coagulation tank and the flocculation tank.
Preferably, the inclined plate of the inclined plate sedimentation tank is installed in an inclined manner of 50 degrees.
Preferably, the magnetic force interception system comprises an interception pool and an electromagnet, a plurality of mounting grooves are formed in the side wall of the interception pool, the electromagnet is fixedly arranged in the mounting grooves, and a built-in dosing device is arranged at the top of the interception pool.
Preferably, both ends of the interception tank are respectively provided with a water inlet and a water outlet.
The landfill leachate pretreatment process adopts the landfill leachate pretreatment system and comprises the following steps:
s1: removing a part of suspended matters and particulate matters in the landfill leachate through a screen filter, and enabling the filtered suspended matters, silt and the like to enter a sludge collection tank;
s2: the filtered sewage enters a coagulation tank, and a coagulant is added by coagulation dosing equipment for coagulation;
s3: the sewage enters a flocculation tank after coagulation, a flocculating agent is added by a flocculation dosing device,
s4: after flocculation, the sewage and the flocs enter an inclined plate sedimentation tank together for sedimentation, and the sludge in the inclined plate sedimentation tank enters a sludge collection tank through a sludge discharge pipe;
s5.1: when metal ions need to be intercepted on sewage discharged from the inclined plate sedimentation tank, a first valve at the water outlet end of the inclined plate sedimentation tank is closed, a second valve is opened, and a third valve at the water outlet end of the magnetic interception system is in an open state; the sewage enters a magnetic interception system, metal ions in the wastewater are attracted by a magnetic field under the action of the magnetic field force, the metal ions are captured by the magnetic field to move directionally and stay in a fixed area, deposits formed by adding a medicament through a built-in dosing system are discharged from a sludge discharge port at regular time and are separately collected and stored, and the treated sewage enters an oxidation pond;
s5.2: when metal ions do not need to be trapped in the sewage discharged from the inclined plate sedimentation tank, the first valve is opened, the second valve and the third valve are closed, and the sewage in the inclined plate sedimentation tank is directly discharged into the oxidation tank;
s6: the sewage enters an oxidation tank, the chemical is added through an oxidation chemical adding device, the high-grade oxidation of the percolate is carried out, and the precipitated sludge enters a sludge collection tank through a collection pipe;
s7: the sewage in the oxidation pond enters a clean water pond, and the subsequent advanced treatment can directly take water from the clean water pond.
(1) Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an integrated and optimization to the technology obtain novel landfill leachate pretreatment systems, obviously improve filtration liquid pretreatment effect, can effectively get rid of pollutants such as suspended solid, heavy metal and ammonia nitrogen in the landfill leachate.
(2) The utility model discloses a set up in the system and can dismantle magnetic field force and hold back metal ion unit, reasonable effectual early landfill leachate of having solved refuse landfill contains heavy metal ion and middle and late filtration liquid does not contain metal ion's problem.
(3) The utility model relates to a landfill leachate pretreatment systems, the collection is blocked sediment, suspended solid deposits, metal ion gets rid of, water purification, is got rid of partial organic pollutant, is improved filtration liquid biodegradability in an organic whole, is suitable for the preliminary treatment of early, well, late filtration liquid to landfill leachate after this pretreatment systems handles more does benefit to going on of follow-up advanced treatment.
Drawings
FIG. 1 is a schematic flow chart of a treatment system of the present invention;
FIG. 2 is a schematic view of the magnetic force interception system of the present invention;
FIG. 3 is another schematic view of the magnetic force interception system of the present invention;
in the figure: 1 screen filter, 2 coagulating basin, 3 flocculation basin, 4 swash plate sedimentation ponds, 5 magnetic force entrapment systems: 51 interception pond, 5101 mounting groove, 52 electromagnet, 53 water inlet, 54 water outlet, 55 sludge discharge port, 6 oxidation pond, 7 clean water pond, 8 sludge pond, 11 coagulation medicine adding equipment, 12 flocculation medicine adding equipment, 13 oxidation medicine adding equipment, 14 built-in medicine adding equipment, 21 first valve, 22 second valve, 23 third valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the utility model provides a landfill leachate pretreatment system, the landfill leachate is passed through a double-layer adjustable screen filter 1 to remove a part of suspended matters and particles, and the filtered suspended matters and silt enter a sludge collection tank 8; the double-mesh diameter of the double-layer adjustable mesh filter is adjustable, and the optimized mesh diameter is selected according to different water quality conditions of different percolate, so that suspended particles are removed to the maximum extent, the mesh is not blocked, and the normal operation of subsequent treatment equipment is not influenced;
the filtered sewage enters a coagulation tank 2, the coagulation tank 2 is communicated with the water outlet end of a screen filter 1, the coagulation tank 2 is also communicated with a medicine outlet of a coagulation medicine adding device 11 in a medicine adding system, and a coagulant is added by the coagulation medicine adding device 11 for coagulation; the coagulation tank is provided with a common stirrer which can be used for normal stirring, and the description is not provided,
the sewage enters a flocculation tank 3 after coagulation, the flocculation tank 3 is communicated with the water outlet end of a coagulation tank 2, the flocculation tank 3 is also communicated with a medicine outlet of a flocculation medicine adding device 12 in a medicine adding system, and a flocculating agent is added by the flocculation medicine adding device 12 for flocculation; the flocculation tank is provided with a low-speed stirrer, so that the flocs are prevented from being damaged by too fast stirring, and normal low-speed stirring is only needed, which is not described herein;
after flocculation, the sewage and flocs enter an inclined plate sedimentation tank 4 together for sedimentation, and sludge in the inclined plate sedimentation tank enters a sludge collection tank 8 through a sludge discharge pipe; the sedimentation tank adopts an inclined plate sedimentation tank which is obliquely arranged at 50 degrees, the floc sedimentation efficiency is high, the blockage problem caused by sedimentation by using an inclined tube does not exist, the operation effect is good, the stability is high, and a back washing device is not needed to be arranged, so that suspended matters in the percolate are basically removed, and a part of organic matters, metal ions, nitrogen, phosphorus and other nutrient elements are adsorbed on the sludge and are discharged along with the sludge;
the magnetic interception system 5 is communicated with a first water outlet end of the inclined plate sedimentation tank 4, a first valve 21 is installed on the first water outlet end, when metal ions need to be intercepted on sewage discharged from the inclined plate sedimentation tank 4, a first valve 25 of the water outlet end of the inclined plate sedimentation tank 4 is closed, a second valve 22 is opened, and a third valve 23 of the water outlet end of the magnetic interception system 5 is in an open state; the sewage enters the magnetic interception system 5, metal ions in the wastewater are attracted by a magnetic field under the action of the magnetic field force, directionally move and are captured by the magnetic field and stay in a fixed area, sediment formed by adding a medicament through the built-in medicament adding system 14 is discharged from the sludge discharge port 55 at regular time and is separately collected and stored, and the treated sewage enters the oxidation pond 6;
the oxidation pond 6 is communicated with the water outlet end of the magnetic interception system 5, and a third valve 23 is arranged between the oxidation pond 6 and the magnetic interception system 5; the second water outlet end of the sedimentation tank 4 is directly communicated with the oxidation tank 6 through a pipeline, and a second valve 22 is arranged on the second water outlet end; the oxidation pond 6 is also communicated with an oxidation dosing device 13 in the dosing system.
When the metal ions do not need to be trapped in the sewage discharged from the inclined plate sedimentation tank 4, the first valve 25 is opened, the second valve 22 and the third valve 23 are closed, and the sewage in the inclined plate sedimentation tank 4 is directly discharged into the oxidation tank 6;
the magnetic interception system is designed aiming at the condition that the leachate of the early landfill contains metal ions, but the leachate of the middle and late stages does not contain metal ions basically, and the system 5 is closed once the monitored result shows that the content of the metal ions in the leachate of the inlet water is negligible.
The sewage enters an oxidation tank 6, the chemical is added through an oxidation chemical adding device 13, the high-grade oxidation of the percolate is carried out, the biodegradability of the sewage is improved, partial organic matters and ammonia nitrogen are removed, and the precipitated sludge enters a sludge collection tank 8 through a collection pipe; the sewage in the oxidation pond 6 enters a clean water pond 7, and water can be directly taken from the clean water pond 7 after the subsequent advanced treatment.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a landfill leachate pretreatment systems, includes the screen filter, its characterized in that still includes:
the coagulation tank is communicated with the water outlet end of the screen filter and is also communicated with a medicine outlet of coagulation medicine adding equipment in a medicine adding system;
the flocculation tank is communicated with the water outlet end of the coagulation tank, and is also communicated with a medicine outlet of flocculation medicine adding equipment in a medicine adding system;
the inclined plate sedimentation tank is communicated with the water outlet end of the flocculation tank;
the magnetic interception system is communicated with a first water outlet end of the inclined plate sedimentation tank, a first valve is mounted on the first water outlet end, the magnetic interception system comprises an interception tank and an electromagnet, a plurality of mounting grooves are formed in the side wall of the interception tank, the electromagnet is fixedly arranged in the mounting grooves, and built-in dosing equipment is arranged at the top of the interception tank;
the oxidation tank is communicated with the water outlet end of the magnetic interception system, and a third valve is arranged between the oxidation tank and the magnetic interception system; a second water outlet end of the sedimentation tank is communicated with the oxidation tank through a pipeline, and a second valve is arranged on the second water outlet end; the oxidation pond is also communicated with oxidation dosing equipment in a dosing system;
the clean water tank is communicated with the water outlet end of the oxidation tank;
and sludge discharge ports of the screen filter, the inclined plate sedimentation tank and the oxidation tank are communicated with a sludge tank.
2. The landfill leachate pretreatment system of claim 1, wherein: and stirrers are respectively arranged in the coagulation tank and the flocculation tank.
3. The landfill leachate pretreatment system of claim 1, wherein: the inclined plate of the inclined plate sedimentation tank is obliquely installed at 50 degrees.
4. The landfill leachate pretreatment system of any of claim 1, wherein: and a water inlet and a water outlet are respectively arranged at two ends of the interception tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121026519.9U CN214936783U (en) | 2021-05-14 | 2021-05-14 | Landfill leachate pretreatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121026519.9U CN214936783U (en) | 2021-05-14 | 2021-05-14 | Landfill leachate pretreatment system |
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| CN214936783U true CN214936783U (en) | 2021-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415289A (en) * | 2022-08-19 | 2022-12-02 | 上海电力大学 | Be applied to good oxygen restoration gas injection well device of high leachate water level landfill |
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2021
- 2021-05-14 CN CN202121026519.9U patent/CN214936783U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415289A (en) * | 2022-08-19 | 2022-12-02 | 上海电力大学 | Be applied to good oxygen restoration gas injection well device of high leachate water level landfill |
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Address after: No. 3966, Qimen Road, Baohe District, Hefei City, Anhui Province, 230000 Patentee after: ANHUI TONGYUAN ENVIRONMENT ENERGY SAVING Co.,Ltd. Address before: 230000, no.856, Jinzhai South Road, Baohe District, Hefei City, Anhui Province Patentee before: ANHUI TONGYUAN ENVIRONMENT ENERGY SAVING Co.,Ltd. |
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