CN210945110U - Landfill leachate treatment system - Google Patents
Landfill leachate treatment system Download PDFInfo
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- CN210945110U CN210945110U CN201921425773.9U CN201921425773U CN210945110U CN 210945110 U CN210945110 U CN 210945110U CN 201921425773 U CN201921425773 U CN 201921425773U CN 210945110 U CN210945110 U CN 210945110U
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Abstract
The utility model relates to a landfill leachate processing system, including preliminary treatment subsystem and DTRO subsystem, the preliminary treatment subsystem turns into the aeration unit of sulphur simple substance and is used for holding back the first filtering mechanism of sulphur simple substance including being used for making aquatic dissolubility hydrogen sulfide, first filtering mechanism respectively with the delivery port of aeration unit and the water inlet intercommunication of DTRO subsystem. The utility model provides a landfill leachate processing system carries out aeration treatment to filtration liquid through adopting the aeration unit, can make the dissolubility hydrogen sulfide in the filtration liquid turn into sulphur simple substance, and the first filter equipment of rethread removes sulphur simple substance, can avoid polluting on-line monitoring equipment etc. owing to contain sulphur simple substance in the system effluent, guarantees landfill leachate processing system's normal operating and improve equipment's life.
Description
Technical Field
The utility model relates to a landfill leachate treatment system.
Background
In recent years, a two-stage disc-tube reverse osmosis (DTRO) emergency treatment integrated device is mainly used for treating stock landfill leachate as an emergency treatment device, and has the advantages of short supply period, short debugging period, short effluent time, stable and standard effluent quality and the like, so that the integrated device is widely applied to landfill leachate treatment and other aspects nationwide.
The following problems are easy to occur in the application process:
(1) various biochemical indexes of the produced water of the system can reach the standard, but the effluent water contains sulfur simple substances which pollute the online monitoring equipment, so that the online monitoring shows that the effluent water does not reach the standard;
(2) in order to ensure that the ammonia nitrogen in the effluent reaches the standard, a degassing tower unit is generally arranged in the DTRO treatment system, the arrangement of the degassing tower unit ensures the ammonia nitrogen index of the effluent, but simultaneously the soluble hydrogen sulfide in the water is converted into elemental sulfur, so that the online monitoring equipment is polluted;
(3) the DTRO device is intake for the filtration liquid stoste, and the stoste is the sewage that the garbage fermentation generated, and suspended solid SS concentration is high simultaneously, and the raw water is in the anaerobic state in addition, and the suspended solid SS in the stoste forms into a colloidal state under the anaerobic condition, is difficult for through filtering, adds the medicine and thoughtlessly gets rid of, leads to advancing behind the DTRO device sand and consider a jar backwash frequent, and the core type filter core is changed frequently, has shortened the time of intaking, the daily treatment capacity significantly reduced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a landfill leachate processing system can solve prior art's partial defect at least.
The embodiment of the utility model relates to a landfill leachate processing system, including preliminary treatment subsystem and DTRO subsystem, the preliminary treatment subsystem turns into the aeration unit of sulphur simple substance and is used for holding back the first filtering mechanism of sulphur simple substance including being used for making aquatic dissolubility hydrogen sulfide, first filtering mechanism respectively with the delivery port of aeration unit and the water inlet intercommunication of DTRO subsystem.
As one embodiment, the pretreatment subsystem further comprises a coagulation unit and an air flotation unit, and the air flotation unit is communicated with a water outlet of the coagulation unit.
As one embodiment, the aeration unit and the air flotation unit are combined into an integrated device, and the integrated device comprises a pneumatic processing chamber, an aerator arranged in the pneumatic processing chamber and an air flotation releaser arranged in the pneumatic processing chamber.
In one embodiment, the coagulation chamber is divided into a first coagulation zone and a second coagulation zone which are communicated with each other, the first coagulation zone is provided with a water inlet pipe, the second coagulation zone is communicated with the air flotation unit, the first coagulation zone is provided with a PAC dosing mechanism, and the second coagulation zone is provided with a PAM dosing mechanism.
As one example, the first filtration mechanism comprises an in-line microfiltration membrane device.
As one embodiment, the pretreatment subsystem further comprises a regulating reservoir, and the regulating reservoir is communicated with the water inlet of the aeration unit.
In one embodiment, the DTRO subsystem comprises a first stage DTRO processing unit and a second stage DTRO processing unit, the first filtering mechanism is connected to the water inlet of the first stage DTRO processing unit, and the concentrate pipe of the first stage DTRO processing unit is connected to a concentrate tank.
As one embodiment, a mud bucket is arranged at the bottom of the aeration unit and is communicated with the concentrated solution tank through a sludge pipe.
In one embodiment, a second filtering unit, a raw water tank, and a third filtering unit are sequentially disposed between the first filtering unit and the first stage DTRO processing unit along a water flow direction.
In one embodiment, the permeate outlet of the second-stage DTRO treatment unit is connected to a degassing column and a denitrification resin treatment means in this order.
The embodiment of the utility model provides a following beneficial effect has at least:
the utility model provides a landfill leachate processing system carries out aeration treatment to filtration liquid through adopting the aeration unit, can make the dissolubility hydrogen sulfide in the filtration liquid turn into sulphur simple substance, and the first filter equipment of rethread removes sulphur simple substance, can avoid polluting on-line monitoring equipment etc. owing to contain sulphur simple substance in the system effluent, guarantees landfill leachate processing system's normal operating and improve equipment's life.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic composition diagram of a landfill leachate treatment system without a concentrated solution reduction treatment subsystem according to an embodiment of the present invention;
fig. 2 is a schematic composition diagram of a landfill leachate treatment system including a concentrated solution reduction treatment subsystem according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of an integrated air flotation/aeration apparatus provided in an embodiment of the present invention;
fig. 4 is a top view of fig. 3.
Detailed Description
The technical solutions in the embodiments of the present invention are described below clearly and completely, 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 efforts belong to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, the embodiment of the utility model provides a landfill leachate treatment system, including preliminary treatment subsystem and DTRO subsystem, preliminary treatment subsystem is including being used for making the aquatic dissolubility hydrogen sulfide turn into the aeration unit of elemental sulfur and being used for holding back the first filter mechanism 3 of elemental sulfur, first filter mechanism 3 respectively with the delivery port of aeration unit and the water inlet of DTRO subsystem communicates.
Preferably, the first filtering mechanism 3 includes a built-in microfiltration membrane device, which can fully intercept sulfur in the leachate, filter suspended matters and precipitates in the leachate, and prevent the suspended matters and precipitates from entering the DTRO subsystem to block the membrane, thereby prolonging the service life of the DTRO subsystem and reducing the dosage of chemicals in the DTRO subsystem. Of course, other filtering devices capable of removing elemental sulfur are also suitable for use in this embodiment.
The landfill leachate processing system that this embodiment provided, through adopting the aeration unit to carry out aeration treatment to filtration liquid, can make the dissolubility hydrogen sulfide in the filtration liquid turn into the elemental sulfur, the elemental sulfur is got rid of to the first filter mechanism 3 of rethread, can avoid polluting on-line monitoring equipment etc. owing to contain the elemental sulfur in the system effluent, guarantees landfill leachate processing system's normal operating and improve equipment's life.
Further preferably, the pretreatment subsystem further comprises a coagulation unit and an air flotation unit, and the air flotation unit is communicated with a water outlet of the coagulation unit. Through coagulating unit and air supporting unit processing, can further reduce impurity such as suspended solid in the filtration liquid, improve out water quality, reduce the membrane cleaning frequency of DTRO subsystem, slow down the scale deposit, reduce the operation cost. Wherein:
the coagulation unit comprises a coagulation chamber 201 for promoting the leachate to coagulate, and further preferably, the coagulation unit is a dosing coagulation unit, that is, the coagulation unit comprises a dosing mechanism. Preferably, PAM (polyacrylamide) and PAC (Polyaluminium Chloride) are added to the leachate in the coagulation chamber 201, which has a better coagulation effect on impurities such as suspended substances in the leachate. Preferably, PAM and PAC are added in a partition mode, the coagulation effect is better, and specifically:
as shown in fig. 3 and 4, the coagulation chamber 201 is partitioned to form a first coagulation area 2011 and a second coagulation area 2012 which are communicated with each other, the first coagulation area 2011 is provided with a water inlet pipe, the second coagulation area 2012 is communicated with the air flotation unit, the first coagulation area 2011 is configured with a first dosing mechanism, and the second coagulation area 2012 is configured with a second dosing mechanism. Preferably, PAC is added first and then PAM is added, that is, PAC dosing mechanisms are arranged in the first coagulation zone 2011 and PAM dosing mechanisms are arranged in the second coagulation zone 2012. The dosing mechanisms comprise dosing boxes and dosing pumps, and the dosing pumps are communicated with the corresponding coagulation areas. Further preferably, the first coagulation zone 2011 and the second coagulation zone 2012 are both provided with the stirrer 2013, so that the mixing effect of the medicament and the water body can be improved, and the coagulation effect is ensured.
The air flotation unit generally comprises an air flotation chamber, an air flotation releaser 2021 and a residue scraper 2023, which are arranged in the air flotation chamber, and the main purpose of air flotation is to float the micelle and floc generated after coagulation on the liquid surface, so that the residue scraper 2023 can scrape off the micelle and the floc, thereby achieving the purpose of removing suspended matters in the intake water.
Conventionally, the air flotation releaser 2021 is used for releasing a gas-water mixture, and is correspondingly configured with a dissolved air device (shown and not labeled), and the air flotation releaser 2021 and the slag scraper 2023 are conventional devices in the art, and the detailed structure thereof is not described herein.
In one embodiment, the aeration unit is a separate treatment device comprising an aeration chamber and an aerator 2022 (e.g., an aeration pipe, etc.) disposed within the aeration chamber; along the water inlet direction, the aeration chamber can be positioned before the air flotation chamber or after the air flotation chamber, preferably after the air flotation chamber, and the sulfide is treated after the micelle and the floc in the percolate are removed. In another embodiment, as shown in fig. 3 and 4, the aeration unit and the air flotation unit are combined into an integrated device 2, the integrated device 2 comprises a pneumatic treatment chamber 202, an aerator 2022 arranged in the pneumatic treatment chamber 202, and an air flotation releaser 2021 arranged in the pneumatic treatment chamber 202, and the structure can significantly reduce the occupied space of the system and simplify the flow.
In the pneumatic processing chamber 202, the air flotation releaser 2021 may be disposed at the water inlet side of the pneumatic processing chamber 202 to promote the floating of the micelles, flocs, etc. in the water body for the first time, and the residue scraper 2023 is disposed at the rear side of the air flotation releaser 2021 along the water flow direction. The aeration range of the aerator 2022 described above may cover the entire cross section of the pneumatic treatment chamber 202. Preferably, the air flotation releaser 2021 and the aerator 2022 are arranged to operate intermittently, and in the process of the intermittent operation of the air flotation releaser 2021 and the aerator 2022, the slag scraper 2023 can operate continuously to ensure the impurity removal effect.
In a further preferred embodiment, as shown in fig. 3 and 4, the coagulation chamber 201 is integrated with the pneumatic treatment chamber 202, so that the system occupies a smaller space, the running stroke of the percolate is shorter, and the energy consumption of the system is lower.
Further, as shown in fig. 3 and 4, the integrated air flotation/aeration apparatus 2 further includes a settling chamber 203, in which settling chamber 203 sludge and suspended matter in the water body can be further removed; further preferably, the settling chamber 203 is an inclined plate settling chamber 203, that is, an inclined plate is arranged in the settling chamber 203, so that the effect and efficiency of settling the sludge and suspended matters can be improved. An outlet chamber 204 can be arranged at the outlet side of the settling chamber 203, and an outlet pipe is arranged on the outlet chamber 204; wherein the supernatant of the effluent from the settling chamber 203 preferably flows automatically into the effluent chamber 204; in addition, the coagulation chamber 201 and the pneumatic treatment chamber 202 and the sedimentation chamber 203 are preferably realized by self-flowing of water, so that the running energy consumption of the device can be saved.
Further optimizing the above embodiment, referring to fig. 1 and 2, the pretreatment subsystem further comprises a regulating reservoir 1, and the regulating reservoir 1 is communicated with the water inlet of the aeration unit. The leachate is adjusted by the adjusting tank 1, so that the subsequent pretreatment effect can be improved.
The DTRO subsystem is a piece of equipment known in the art, for example, an integrated two stage Disk and Tube Reverse Osmosis (DTRO) emergency treatment device. Generally, it comprises a first stage DTRO processing unit 7 and a second stage DTRO processing unit 8, and the first filter mechanism 3 is communicated with the water inlet of the first stage DTRO processing unit 7.
Further, as shown in fig. 1 and 2, a second filter mechanism 4, a raw water tank 5, and a third filter mechanism 6 are provided between the first filter mechanism 3 and the first stage DTRO treatment unit 7 in this order in the water flow direction. The second filtering mechanism 4 can adopt a filtering device such as a basket filter; the third filter mechanism 6 may employ a filter device such as a sand filter tank.
Further, as shown in fig. 1 and 2, the permeate outlet of the second-stage DTRO processing unit 8 is connected with a degassing tower 9 and a denitrification resin processing mechanism 10 in sequence, and the degassing tower 9 and the denitrification resin processing mechanism 10 are all conventional equipment in the art and will not be described in detail herein.
The DTRO subsystem is used as a main treatment station for treating the percolate, and can ensure the treatment effect on the percolate, so that the effluent quality of the system reaches the discharge standard.
A concentrate tank 11 is connected to the concentrate pipe of the first-stage DTRO processing unit 7, and the concentrate generated in the first-stage DTRO processing unit 7 is discharged into the concentrate tank 11 to be stored and is ready for refilling or transportation.
Furthermore, a hopper 2024 is provided at the bottom of the aeration unit, and in the integrated air-flotation/aeration apparatus 2, the hopper 2024 is provided at the bottom of the pneumatic processing chamber 202; elemental sulphur generated by aeration can settle in the hopper 2024 together with the sludge in the percolate. The hopper 2024 is preferably connected to the concentrate tank 11 through a sludge line and is refilled or disposed of together with the concentrate.
In a further preferred embodiment, as shown in fig. 2, the concentrated solution is treated by a concentrated solution reduction processing subsystem, which may employ a DTRO reduction device 13, wherein the DTRO reduction device 13 is a conventional device in the art, and the detailed structure is omitted here.
Similarly, the DTRO abatement device 13 is likely to generate sulfide/elemental sulfur in the inlet water, and the DTRO abatement device 13 is generally configured with a degassing tower unit, which is likely to convert the soluble hydrogen sulfide in the inlet water into elemental sulfur, and in order to avoid the elemental sulfur from polluting the online monitoring equipment, as shown in fig. 2, the concentrated solution abatement subsystem further includes a concentrated solution pretreatment device, which includes an aeration mechanism for converting the soluble hydrogen sulfide in the concentrated solution into elemental sulfur and a fourth filtering mechanism 12 for intercepting the elemental sulfur.
The structure of the aeration mechanism can refer to the aeration unit, for example, the air floatation/aeration integrated device 2 is adopted, and the detailed description is omitted here.
The fourth filtration means 12 is also preferably a built-in microfiltration membrane device.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a landfill leachate processing system, includes preliminary treatment subsystem and DTRO subsystem, its characterized in that: the pretreatment subsystem comprises an aeration unit for converting soluble hydrogen sulfide in water into elemental sulfur and a first filtering mechanism for intercepting the elemental sulfur, and the first filtering mechanism is respectively communicated with a water outlet of the aeration unit and a water inlet of the DTRO subsystem.
2. The landfill leachate treatment system of claim 1, wherein: the pretreatment subsystem further comprises a coagulation unit and an air floatation unit, and the air floatation unit is communicated with a water outlet of the coagulation unit.
3. The landfill leachate treatment system of claim 2, wherein: the aeration unit and the air flotation unit are combined into an integrated device, and the integrated device comprises a pneumatic treatment chamber, an aerator arranged in the pneumatic treatment chamber and an air flotation releaser arranged in the pneumatic treatment chamber.
4. The landfill leachate treatment system of claim 2, wherein: the coagulating chamber is divided to form a first coagulating area and a second coagulating area which are communicated with each other, the first coagulating area is provided with a water inlet pipe, the second coagulating area is communicated with the air floatation unit, the first coagulating area is provided with a PAC dosing mechanism, and the second coagulating area is provided with a PAM dosing mechanism.
5. The landfill leachate treatment system of claim 1, wherein: the first filtering mechanism comprises a built-in micro-filtration membrane device.
6. The landfill leachate treatment system of any one of claims 1 to 5, wherein: the pretreatment subsystem further comprises a regulating reservoir, and the regulating reservoir is communicated with the water inlet of the aeration unit.
7. The landfill leachate treatment system of claim 1, wherein: the DTRO subsystem comprises a first-stage DTRO treatment unit and a second-stage DTRO treatment unit, the first filtering mechanism is communicated with a water inlet of the first-stage DTRO treatment unit, and a concentrated liquid pipe of the first-stage DTRO treatment unit is connected with a concentrated liquid tank.
8. The landfill leachate treatment system of claim 7, wherein: and a mud bucket is arranged at the bottom of the aeration unit and is communicated with the concentrated liquid tank through a sludge pipe.
9. The landfill leachate treatment system of claim 7, wherein: and a second filtering mechanism, a raw water tank and a third filtering mechanism are sequentially arranged between the first filtering mechanism and the first-stage DTRO processing unit along the water flow direction.
10. The landfill leachate treatment system of claim 7, wherein: and a permeate outlet of the second-stage DTRO treatment unit is sequentially connected with a degassing tower and a denitrification resin treatment mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921425773.9U CN210945110U (en) | 2019-08-30 | 2019-08-30 | Landfill leachate treatment system |
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| CN201921425773.9U CN210945110U (en) | 2019-08-30 | 2019-08-30 | Landfill leachate treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113443758A (en) * | 2021-05-27 | 2021-09-28 | 武汉天源环保股份有限公司 | Full-quantitative pretreatment device, treatment system and treatment method for landfill leachate |
| CN114249442A (en) * | 2021-12-14 | 2022-03-29 | 莱特莱德(上海)技术有限公司 | High-hardness wastewater treatment device and method |
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2019
- 2019-08-30 CN CN201921425773.9U patent/CN210945110U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113443758A (en) * | 2021-05-27 | 2021-09-28 | 武汉天源环保股份有限公司 | Full-quantitative pretreatment device, treatment system and treatment method for landfill leachate |
| CN114249442A (en) * | 2021-12-14 | 2022-03-29 | 莱特莱德(上海)技术有限公司 | High-hardness wastewater treatment device and method |
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