CN209974468U - Full-scale treatment device for landfill leachate - Google Patents
Full-scale treatment device for landfill leachate Download PDFInfo
- Publication number
- CN209974468U CN209974468U CN201920441161.2U CN201920441161U CN209974468U CN 209974468 U CN209974468 U CN 209974468U CN 201920441161 U CN201920441161 U CN 201920441161U CN 209974468 U CN209974468 U CN 209974468U
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- China
- Prior art keywords
- reaction tank
- tank
- water outlet
- water
- landfill leachate
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- 239000000149 chemical water pollutant Substances 0.000 title claims abstract description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 57
- 238000006243 chemical reaction Methods 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 34
- 239000012528 membrane Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 20
- 159000000003 magnesium salts Chemical class 0.000 claims abstract description 19
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 17
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 15
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 15
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 15
- 238000001471 micro-filtration Methods 0.000 claims abstract description 12
- 239000012466 permeate Substances 0.000 claims abstract description 9
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 9
- 239000012141 concentrate Substances 0.000 claims abstract description 8
- 230000003647 oxidation Effects 0.000 claims abstract description 8
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 6
- 239000004021 humic acid Substances 0.000 description 6
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model relates to the field of landfill leachate treatment, in particular to a full-scale treatment device for landfill leachate, which comprises a raw water tank, wherein the water outlet end of the raw water tank is connected to a pretreatment device through a pipeline and a water inlet pump, the water outlet end of the pretreatment device is connected with a precision filter through a pipeline, the water outlet end of the precision filter is connected with a material membrane component through a pipeline and a high-pressure pump, the permeate outlet of the material membrane component is connected with a high-grade oxidation device, the concentrate outlet of the material membrane component is communicated with a softening device, a microfiltration device, a reverse osmosis device and a drying device through pipelines and a delivery, the softening device comprises a calcium hydroxide reaction tank, a first inclined net frame, a sodium hydroxide and magnesium salt mixed reaction tank, a second inclined net frame, a sodium carbonate reaction tank, a third inclined net frame and a water storage tank which are arranged from top to bottom, and the water outlet end of the water storage tank is communicated with the microfiltration device. The utility model discloses processing apparatus comprises current conventional equipment, simple structure, and the cost is low for the construction, and control is convenient.
Description
Technical Field
The utility model relates to a landfill leachate handles the field, especially relates to a be used for landfill leachate total processing apparatus.
Background
At present, the landfill leachate treatment generally adopts a combined process of 'pretreatment + biological treatment + membrane treatment'. The combined treatment process is the mainstream process for treating the waste leachate in China, and has many advantages, such as: solves the problem of deep treatment of a large amount of refractory substances and toxic substances contained in the leachate, and has the advantages of strong impact load resistance, good effluent effect, high standard reaching rate, low operating cost and the like. However, this has been accompanied by the problem that a membrane concentrate of more than about 40% is produced. A large amount of refractory organic matters, inorganic salts and trace heavy metals are enriched in the concentrated solution, and the concentrated solution is difficult to treat by the traditional process; moreover, the membrane concentrated solution is back filled into the landfill to cause salt and refractory organic matters to accumulate, so that the leachate treatment device cannot normally operate, thereby forming vicious circle and possibly causing the operation safety of the landfill. According to the existing engineering case, the treatment technology of the membrane concentrated solution is not mature, and the construction and operation cost is up to more than 200 yuan/ton, which becomes the bottleneck of the development of the landfill leachate treatment industry. Therefore, there is an urgent need for an apparatus for advanced treatment of waste leachate at a low treatment cost.
SUMMERY OF THE UTILITY MODEL
Therefore, to foretell problem, the utility model provides a be used for landfill leachate total processing apparatus, its simple structure, the construction is with low costs, and control is convenient.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a full-scale treatment device for landfill leachate comprises a raw water tank, wherein the water outlet end of the raw water tank is connected to a pretreatment device through a pipeline and a water inlet pump, the water outlet end of the pretreatment device is connected with a precision filter through a pipeline, the water outlet end of the precision filter is connected with a material membrane component through a pipeline and a high-pressure pump, the permeate outlet of the material membrane component is connected to an advanced oxidation device, the concentrate outlet of the material membrane component is communicated with a softening device, a microfiltration device, a reverse osmosis device and a drying device sequentially through a pipeline and a conveying pump, the softening device comprises a calcium hydroxide reaction tank, a first inclined net frame, a sodium hydroxide and magnesium salt mixed reaction tank, a second inclined net frame, a sodium carbonate reaction tank, a third inclined net frame and a water storage tank which are arranged from top to bottom, the water outlet end of the water storage tank is communicated with the microfiltration device, and the higher end of, the higher end of the second inclined screen frame is close to the water outlet of the sodium hydroxide and magnesium salt mixed reaction tank, and the higher end of the third inclined screen frame is close to the water outlet of the sodium carbonate reaction tank.
In a further improvement, the first inclined screen frame is arranged in a sodium hydroxide and magnesium salt mixed reaction tank, the second inclined screen frame is arranged in a sodium carbonate reaction tank, and the third inclined screen frame is arranged in a water storage tank.
In a further improvement, stirring devices are arranged in the calcium hydroxide reaction tank, the sodium hydroxide and magnesium salt mixed reaction tank and the sodium carbonate reaction tank.
The further improvement is that feeding devices for feeding materials into the respective reaction tanks are arranged on the calcium hydroxide reaction tank, the sodium hydroxide and magnesium salt mixed reaction tank and the sodium carbonate reaction tank.
In a further improvement, the material membrane modules are internally provided with circulating pumps.
By adopting the technical scheme, the beneficial effects of the utility model are that: the utility model discloses at first just with the landfill leachate after biochemical treatment after the preliminary treatment, extract the membrane concentrate that contains humic acid, and deposit heavy metal ion and calcium, magnesium ion in the membrane concentrate through softening installation, get rid of remaining heavy metal ion and calcium, magnesium ion in the membrane concentrate, improve the quality of humic acid, make it can regard as organic fertilizer to use, its fertilizer efficiency is very good, better using value has, the resource has effectively been utilized, certain practical application value has, simultaneously because humic acid waste liquid has been separated out in the extraction, need not to carry out the back spray incineration or fly ash solidification, or chemical oxidation treatment, reduce the treatment cost of humic acid in the landfill leachate; set up first slope screen frame, second slope screen frame, third slope screen frame in softening installation, can produce the precipitate after to the reaction and carry out filterable while, still can wash away remaining the precipitate on each screen frame, make the precipitate pile up in the lower of screen frame, prevent that whole screen frame from blockking up, the clearance of being convenient for. The utility model discloses simple structure, the construction is with low costs, and control is convenient.
Drawings
FIG. 1 is a schematic structural view of the garbage leachate total treatment device of the present invention;
FIG. 2 is a schematic structural diagram of a softening device in the garbage leachate total treatment device of the present invention.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1, the embodiment provides a full-scale treatment device for landfill leachate, which includes a raw water tank 1, a water outlet end of the raw water tank 1 is connected to a pretreatment device 2 through a pipeline and a water inlet pump, a water outlet end of the pretreatment device 2 is connected to a precision filter 3 through a pipeline, a water outlet end of the precision filter 3 is connected to a material membrane module 4 through a pipeline and a high-pressure pump, a permeate outlet of the material membrane module 4 is connected to a high-grade oxidation device 5, the permeate is treated by the high-grade oxidation device 5 and then discharged after reaching standards, a concentrate outlet of the material membrane module 4 is communicated with a softening device 6, a microfiltration device 7, a reverse osmosis device 8 and a drying device 9 through pipelines and a delivery pump in sequence, the softening device 6 includes a calcium hydroxide reaction tank 61, a first inclined net frame 62, a sodium hydroxide and magnesium salt mixing reaction tank, The sodium carbonate reaction tank 65, the third inclined net frame 66 and the water storage tank 67, wherein the water outlet end of the water storage tank 67 is communicated with the microfiltration device 7, in this embodiment, the higher end of the first inclined net frame 62 is close to the water outlet of the calcium hydroxide reaction tank 61, the higher end of the second inclined net frame 64 is close to the water outlet of the sodium hydroxide and magnesium salt mixed reaction tank 63, the higher end of the third inclined net frame 66 is close to the water outlet of the sodium carbonate reaction tank 65, specifically, the first inclined net frame 62 is detachably covered in the sodium hydroxide and magnesium salt mixed reaction tank 63, the second inclined net frame 64 is detachably covered in the sodium carbonate reaction tank 65, the third inclined net frame 66 is detachably covered in the water storage tank 67, and meanwhile, in order to accelerate the reaction, the calcium hydroxide reaction tank 61, the sodium hydroxide and magnesium salt mixed reaction tank 63, the water storage tank 67, The sodium carbonate reaction tank 65 is internally provided with a stirring device 69.
In this embodiment, the calcium hydroxide reaction tank 61, the sodium hydroxide and magnesium salt mixed reaction tank 62, and the sodium carbonate reaction tank 63 are all provided with a feeding device 68 for feeding materials into the respective tanks.
In this embodiment, the material membrane module 4 is provided with a circulating pump therein for removing the contaminant deposition on the membrane surface.
It should be noted that the raw water tank, the pretreatment device, the precision filter, the material membrane module, the advanced oxidation device, the micro-filtration device, the reverse osmosis device, the drying device, the stirring device and the like in the treatment device of the utility model are all composed of the existing conventional equipment.
The utility model discloses a working process does: conveying the percolate collected in the raw water tank into a pretreatment device through a conveying pump for water quality adjustment, adjusting the pH value of the percolate to 4-9, adjusting the ORP value to 150-250mV, and facilitating membrane separation of the percolate; then the pretreated effluent enters a precision filter, and the filtered percolate enters a material membrane component which is provided with a circulating pump so as to maintain the membrane device to operate under a stable flow and avoid the deposition of pollutants on the surface of the membrane; the leachate is subjected to pressure increase (10-30 bar) by a high-pressure pump, then permeates through the membrane element to form a permeate, enters an advanced oxidation device for treatment, and then is discharged after reaching the standard; the method comprises the steps of intercepting humic acid of macromolecular organic matters to form concentrated solution, conveying the concentrated solution into a calcium hydroxide reaction tank through a conveying pump, keeping the pH value of the concentrated solution at 10-10.5, enabling the concentrated solution to react with calcium hydroxide, precipitating magnesium and heavy metal ions in the concentrated solution, reducing the total hardness of the concentrated solution, standing for precipitation, conveying liquid flowing out of the calcium hydroxide reaction tank into a sodium hydroxide and magnesium salt mixed reaction tank, reacting with sodium hydroxide and magnesium salt, controlling the pH value at 11-12, standing for precipitation after reaction, conveying liquid flowing out of the sodium hydroxide and magnesium salt mixed reaction tank into a sodium carbonate reaction tank for reaction, further reducing heavy metal salts in the reaction liquid, and ensuring that the subsequent microfiltration and reverse osmosis processes are not prone to blockage. The concentrated solution is softened in multiple stages, flows out of a sodium hydroxide and magnesium salt mixed reaction tank, enters a microfiltration membrane device, is subjected to microfiltration to obtain trapped fluid and permeate, the trapped fluid can be subjected to dehydration and solidification treatment at the later stage, the permeate directly enters a reverse osmosis membrane device to be subjected to reverse osmosis filtration, and is filtered by the reverse osmosis membrane to obtain produced water and concentrated solution, and the concentrated solution is spray-dried by a drying device to prepare humic acid powder.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a be used for landfill leachate gross processing apparatus which characterized in that: the device comprises a raw water tank, wherein the water outlet end of the raw water tank is connected to a pretreatment device through a pipeline and a water inlet pump, the water outlet end of the pretreatment device is connected with a precision filter through a pipeline, the water outlet end of the precision filter is connected with a material membrane component through a pipeline and a high-pressure pump, the permeate outlet of the material membrane component is connected to an advanced oxidation device, the concentrate outlet of the material membrane component is communicated with a softening device, a microfiltration device, a reverse osmosis device and a drying device through a pipeline and a delivery pump sequentially, the softening device comprises a calcium hydroxide reaction tank, a first inclined net frame, a sodium hydroxide and magnesium salt mixed reaction tank, a second inclined net frame, a sodium carbonate reaction tank, a third inclined net frame and a water storage tank which are arranged from top to bottom, the water outlet end of the water storage tank is communicated with the microfiltration device, the higher end of the first inclined net frame is close to the water outlet of the calcium hydroxide reaction tank, the higher end of the third inclined screen frame is close to the water outlet of the sodium carbonate reaction tank.
2. The device of claim 1, wherein the device is used for the total treatment of landfill leachate: the first inclined screen frame is arranged in a sodium hydroxide and magnesium salt mixed reaction tank, the second inclined screen frame is arranged in a sodium carbonate reaction tank, and the third inclined screen frame is arranged in a water storage tank.
3. The device of claim 1, wherein the device is used for the total treatment of landfill leachate: and stirring devices are arranged in the calcium hydroxide reaction tank, the sodium hydroxide and magnesium salt mixed reaction tank and the sodium carbonate reaction tank.
4. The device of claim 1, wherein the device is used for the total treatment of landfill leachate: and feeding devices for feeding materials into the respective reaction tanks are arranged on the calcium hydroxide reaction tank, the sodium hydroxide and magnesium salt mixed reaction tank and the sodium carbonate reaction tank.
5. The device of claim 1, wherein the device is used for the total treatment of landfill leachate: and circulating pumps are arranged in the material membrane components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920441161.2U CN209974468U (en) | 2019-04-02 | 2019-04-02 | Full-scale treatment device for landfill leachate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920441161.2U CN209974468U (en) | 2019-04-02 | 2019-04-02 | Full-scale treatment device for landfill leachate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209974468U true CN209974468U (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920441161.2U Expired - Fee Related CN209974468U (en) | 2019-04-02 | 2019-04-02 | Full-scale treatment device for landfill leachate |
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| Country | Link |
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| CN (1) | CN209974468U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113562883A (en) * | 2021-08-23 | 2021-10-29 | 厦门嘉戎技术股份有限公司 | Landfill leachate pretreatment process |
| CN114130200A (en) * | 2022-02-08 | 2022-03-04 | 北京中源创能工程技术有限公司 | Device and method for extracting liquid bio-organic fertilizer by double-membrane method |
| CN116606043A (en) * | 2023-07-19 | 2023-08-18 | 天津高能时代水处理科技有限公司 | Full quantification treatment method and system for percolate |
-
2019
- 2019-04-02 CN CN201920441161.2U patent/CN209974468U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113562883A (en) * | 2021-08-23 | 2021-10-29 | 厦门嘉戎技术股份有限公司 | Landfill leachate pretreatment process |
| CN114130200A (en) * | 2022-02-08 | 2022-03-04 | 北京中源创能工程技术有限公司 | Device and method for extracting liquid bio-organic fertilizer by double-membrane method |
| CN116606043A (en) * | 2023-07-19 | 2023-08-18 | 天津高能时代水处理科技有限公司 | Full quantification treatment method and system for percolate |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200121 |