CN216972080U - Reverse osmosis device suitable for landfill leachate treatment - Google Patents
Reverse osmosis device suitable for landfill leachate treatment Download PDFInfo
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- CN216972080U CN216972080U CN202121356920.9U CN202121356920U CN216972080U CN 216972080 U CN216972080 U CN 216972080U CN 202121356920 U CN202121356920 U CN 202121356920U CN 216972080 U CN216972080 U CN 216972080U
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Abstract
The utility model provides a reverse osmosis device suitable for treating landfill leachate, which comprises a clean water main pipe and N reverse osmosis sections which are sequentially connected along the sewage flowing direction, wherein N is more than or equal to 4; each reverse osmosis section comprises reverse osmosis membrane components and a circulating pump arranged on the inlet side of each reverse osmosis membrane component, a clear water outlet pipe of each reverse osmosis membrane component is connected to the clear water main pipe, and a water inlet pipe of the circulating pump of the rear reverse osmosis section is communicated with a concentrated water outlet pipe of the reverse osmosis membrane component of the front reverse osmosis section. The reverse osmosis device provided by the utility model adopts at least four reverse osmosis sections to treat sewage, can effectively improve the water recovery rate of the reverse osmosis device, correspondingly, the more the concentrated water yield is, can be better suitable for treating the landfill leachate, can reduce the treatment load of concentrated water reduction equipment, even replace reverse osmosis concentrated water reduction equipment, and reduce the engineering investment, the engineering land occupation and the operation cost.
Description
Technical Field
The utility model belongs to the technical field of wastewater treatment equipment, and particularly relates to a reverse osmosis device suitable for treating landfill leachate.
Background
The filtering aperture of the reverse osmosis membrane is generally between 0.1 and 0.7nm, and under the external pressure higher than osmotic pressure, the salt, organic matters, heavy metals and the like in water can be effectively removed, and reverse osmosis produced water reaches the standard for recycling or discharging; the reverse osmosis membrane is the core equipment of the current landfill leachate treatment process and is the final barrier for the produced water to reach the standard.
At present, a reverse osmosis device adopts a design mode of concentrated water internal circulation, generally adopts a one-stage two-stage structure, the reverse osmosis recovery rate is between 65% and 75%, namely 65% to 75% of the water inflow becomes clear water, 25% to 35% of the water inflow becomes concentrated water, the clear water can be reused in production, and the concentrated water can be discharged out of a system or subjected to reduction treatment by using a high-pressure reverse osmosis device. Along with the increasing severity of the treatment task of the landfill leachate, the generation amount of concentrated water is increased, so that the reduction treatment system is overloaded, the treatment cost of the landfill leachate is increased or secondary environmental pollution is caused; in addition, the water yield of the landfill leachate treatment system also needs to be improved so as to face the problem of water resource shortage.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a reverse osmosis device suitable for treating landfill leachate, which can at least solve part of defects in the prior art.
The utility model relates to a reverse osmosis device suitable for treating landfill leachate, which comprises a clean water main pipe and N reverse osmosis sections which are sequentially connected along the sewage flowing direction, wherein N is more than or equal to 4; each reverse osmosis section comprises reverse osmosis membrane components and a circulating pump arranged on the inlet side of each reverse osmosis membrane component, a clear water outlet pipe of each reverse osmosis membrane component is connected to the clear water main pipe, and a water inlet pipe of the circulating pump of the rear reverse osmosis section is communicated with a concentrated water outlet pipe of the reverse osmosis membrane component of the front reverse osmosis section.
In one embodiment, the number of membranes of each reverse osmosis membrane module decreases from section to section along the sewage flow direction.
As one embodiment, the reverse osmosis device further comprises a sewage header pipe, the inlet pipe of each circulating pump and the concentrate outlet pipe of each reverse osmosis membrane module are connected to the sewage header pipe in a bypassing manner, and a first control valve is arranged on a pipe body of the sewage header pipe between the bypass point of the inlet pipe of each circulating pump and the corresponding bypass point of the concentrate outlet pipe.
In one embodiment, a second control valve is arranged on at least part of the circulating pump water inlet pipe in each reverse osmosis section downstream of the second section reverse osmosis section.
In one embodiment, an interstage booster pump is arranged on the inlet side of each circulating pump downstream of the second stage reverse osmosis stage.
In one embodiment, the inter-stage booster pump is provided with a flat pressure bypass, and a third control valve is provided on the flat pressure bypass.
In one embodiment, a high-pressure pump is arranged on the inlet side of the circulating pump of the first reverse osmosis section.
In one embodiment, the reverse osmosis apparatus further comprises a housing, and each reverse osmosis segment is disposed in the housing.
The utility model has at least the following beneficial effects:
the reverse osmosis device provided by the utility model adopts at least four reverse osmosis sections to treat sewage, can effectively improve the water recovery rate of the reverse osmosis device, correspondingly, the more the concentrated water yield is, can be better suitable for treating the landfill leachate, can reduce the treatment load of concentrated water reduction equipment, even replace reverse osmosis concentrated water reduction equipment, and reduce the engineering investment, the engineering land occupation and the operation cost.
The utility model further has the following beneficial effects:
the reverse osmosis device provided by the utility model can realize multi-mode treatment schemes such as a two-section type treatment mode, a three-section type treatment mode, a four-section type treatment mode and the like through corresponding design of pipelines, and can correspondingly select the treatment mode according to working conditions such as the quality of incoming water and the like, thereby effectively improving the application range of the reverse osmosis device, reducing the sewage treatment cost and prolonging the service life of the reverse osmosis device.
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 structural diagram of a reverse osmosis apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a reverse osmosis apparatus suitable for treating landfill leachate, including a clean water main pipe and N reverse osmosis sections sequentially connected along a sewage flow direction, where N is greater than or equal to 4; each reverse osmosis section comprises a reverse osmosis membrane assembly 4 and a circulating pump 3 arranged at the inlet side of the reverse osmosis membrane assembly 4, a clear water outlet pipe of each reverse osmosis membrane assembly 4 is connected to the clear water main pipe, and a water inlet pipe of the circulating pump 3 of the next reverse osmosis section is communicated with a concentrated water outlet pipe of the reverse osmosis membrane assembly 4 of the previous reverse osmosis section.
The clean water main pipe can be connected to the clean water tank, and the water produced by the reverse osmosis device is discharged to the clean water tank so as to be recycled or used for other purposes.
Generally, the reverse osmosis device also comprises a shell, and each reverse osmosis section is uniformly distributed in the shell, so that the integrated arrangement of the reverse osmosis device can be realized, and the integral transportation and installation are convenient.
It can be understood that the next reverse osmosis stage is used for treating the concentrated water produced by the previous reverse osmosis stage, and as the number of reverse osmosis stages through which the sewage flows increases, the recovery rate of the reverse osmosis device is higher, and accordingly the water yield of the concentrated water is lower. In this embodiment, the number of the reverse osmosis sections is 4, that is, the reverse osmosis device adopts a four-section design, and the recovery rate can reach more than 80%.
Preferably, as shown in fig. 1, the number of membranes of each reverse osmosis membrane module 4 decreases section by section along the sewage flowing direction. Generally, when a plurality of reverse osmosis membranes are arranged in the reverse osmosis membrane module 4, the reverse osmosis membranes are arranged in parallel, sewage can be synchronously treated, effluent of each reverse osmosis membrane is discharged by a clear water outlet pipe, and concentrated water of each reverse osmosis membrane is discharged by a concentrated water outlet pipe. The quantity of reverse osmosis membranes in each reverse osmosis section can be selected and designed according to specific treatment working conditions; in one embodiment, the single reduction amount gradually decreased in the sections is 1, that is, the number of reverse osmosis membranes in the previous section is 1 more than that in the next section; in the above-mentioned four-section formula design, can design the reverse osmosis membrane quantity of first section reverse osmosis section and be 4.
Generally, the above-mentioned circulating pump 3 needs to play a circulating role, for example, a return pipe is connected to the corresponding concentrated water outlet pipe, the return pipe is connected to the water inlet pipe of the circulating pump 3, and a part of the concentrated water corresponding to the reverse osmosis membrane module 4 can flow back to the circulating pump 3, so as to realize the internal circulation treatment of the concentrated water and improve the sewage treatment effect. In one embodiment, as shown in fig. 1, the reverse osmosis device further comprises a sewage header pipe, the inlet pipe of each circulating pump 3 and the concentrate outlet pipe of each reverse osmosis membrane module 4 are connected to the sewage header pipe in a bypassing manner, and a first control valve 6 is arranged on the sewage header pipe body between the bypass point of the inlet pipe of each circulating pump 3 and the corresponding bypass point of the concentrate outlet pipe; based on the structure, the internal circulation effect of the concentrated water can be achieved through the control of the pump pressure, wherein preferably, according to the operating pressure of the reverse osmosis device, the first section of circulating pump 3 and the second section of circulating pump 3 can play a role in circulating the concentrated water, each section of circulating pump 3 at the downstream of the second section generally plays a role in carrying out high-speed cross flow on the surface of the membrane, so that pollutants are not easy to deposit on the surface of the membrane, the membrane pollution is reduced, and the continuous service time of the membrane is prolonged.
In a further preferred scheme, as shown in fig. 1, in each reverse osmosis section downstream of the second-stage reverse osmosis section, at least part of the water inlet pipes of the circulating pumps 3 are provided with second control valves 7, and preferably, the water inlet pipes of each section of the circulating pumps 3 downstream of the second-stage reverse osmosis section are provided with the second control valves 7. Further, a shut valve 9 may be provided on the concentrate outlet pipe of each reverse osmosis membrane module 4 downstream of the second reverse osmosis stage. Based on the structure, the second control valve 7 is used for cutting off the inflow water corresponding to the circulating pump 3, the corresponding cut-off valve 9 is closed, the corresponding first control valve 6 is opened, and the concentrated water in the second section of reverse osmosis section can be treated without the subsequent reverse osmosis section, i.e. the reverse osmosis device can realize multi-mode treatment schemes such as a two-section treatment mode, a three-section treatment mode and a four-section treatment mode, for example, the treatment mode is correspondingly selected according to the quality of the incoming water, so that the application range of the reverse osmosis device can be effectively improved, the sewage treatment cost is reduced, and the service life of the reverse osmosis device is prolonged; generally speaking, based on the control of opening of circulating pump 3 self, can reach pipeline on-off control's effect, nevertheless through further setting up above-mentioned second control valve 7, can guarantee the reliability to sewage flow direction control, can avoid sewage to erode the pump body repeatedly simultaneously, prolong the life of pump to a certain extent.
The first control valve 6, the second control valve 7 and the shut-off valve 9 are all preferably automatic control valves, for example, the first control valve 6 is a servo needle type regulating valve, and the second control valve 7 is an electric shut-off valve, but the valve selection is not limited thereto.
Preferably, as shown in fig. 1, a high pressure pump 2 is provided at the inlet side of the circulation pump 3 of the first reverse osmosis stage, and the operating pressure of the first reverse osmosis stage can be provided by the high pressure pump 2. In the above-described structure provided with the sewage main pipe, the high-pressure pump 2 may be disposed on the sewage main pipe. Further, a water supply pump 1 may be provided on the inlet side of the high-pressure pump 2, and the water supply pump 1 may also be disposed on the above-described sewage main.
Compare in raw water, the concentration of each material all increases, the osmotic pressure increases in the dense water of second section reverse osmosis section, in this embodiment, as shown in fig. 1, each circulating pump 3 inlet side of second section reverse osmosis section low reaches all is equipped with intersegment booster pump 5, also this intersegment booster pump 5 locates between adjacent two sections reverse osmosis sections, for example locate on the oral siphon that corresponds circulating pump 3 or be located between the oral siphon that corresponds circulating pump 3 and the dense water outlet pipe of last section reverse osmosis membrane subassembly 4, in the above-mentioned structure that is equipped with the sewage house steward, this intersegment booster pump 5 also can arrange on this sewage house steward. The increase of the osmotic pressure of the front section can be correspondingly matched through the inter-section booster pump 5, and the water yield of the corresponding reverse osmosis section is ensured.
Further preferably, as shown in fig. 1, the inter-stage booster pump 5 is provided with a flat pressure bypass, and a third control valve 8 is arranged on the flat pressure bypass; whether controllable intersegment booster pump 5 puts into operation through this concora crush bypass, for example under the better condition of pending sewage quality of water, can not open this intersegment booster pump 5, reduce the running cost, in addition, in the washing procedure, can bypass this intersegment booster pump 5, do not open the pump.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a reverse osmosis unit suitable for handle landfill leachate which characterized in that: the system comprises a clean water main pipe, a sewage main pipe and N reverse osmosis sections which are sequentially connected along the sewage flowing direction, wherein N is more than or equal to 4; each reverse osmosis section comprises a reverse osmosis membrane assembly and a circulating pump arranged on the inlet side of the reverse osmosis membrane assembly, a clear water outlet pipe of each reverse osmosis membrane assembly is connected to the clear water main pipe, and a water inlet pipe of the circulating pump of the rear reverse osmosis section is communicated with a concentrated water outlet pipe of the reverse osmosis membrane assembly of the front reverse osmosis section; and the inlet pipe of each circulating pump and the concentrated water outlet pipe of each reverse osmosis membrane assembly are connected to the sewage main pipe in a side-by-side mode, and a first control valve is arranged on a sewage main pipe body between the side-by-side connection point of the inlet pipe of each circulating pump and the side-by-side connection point of the corresponding concentrated water outlet pipe.
2. The reverse osmosis plant suitable for the treatment of landfill leachate of claim 1, wherein: along the sewage flowing direction, the number of the membranes of the reverse osmosis membrane modules is gradually reduced section by section.
3. The reverse osmosis plant suitable for the treatment of landfill leachate of claim 1, wherein: in each reverse osmosis section at the downstream of the second section reverse osmosis section, at least part of circulating pump water inlet pipes are provided with second control valves.
4. A reverse osmosis plant suitable for the treatment of landfill leachate according to any one of claims 1 to 3, wherein: the inlet side of each circulating pump at the downstream of the second section reverse osmosis section is provided with an intersegmental booster pump.
5. The reverse osmosis plant suitable for the treatment of landfill leachate of claim 4, wherein: the interstage booster pump is provided with a flat pressure bypass, and a third control valve is arranged on the flat pressure bypass.
6. The reverse osmosis unit suitable for treating landfill leachate of claim 1, wherein: the inlet side of the circulating pump of the first reverse osmosis section is provided with a high-pressure pump.
7. The reverse osmosis unit suitable for treating landfill leachate of claim 1, wherein: the reverse osmosis device also comprises a shell, and the reverse osmosis sections are uniformly distributed in the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121356920.9U CN216972080U (en) | 2021-06-18 | 2021-06-18 | Reverse osmosis device suitable for landfill leachate treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121356920.9U CN216972080U (en) | 2021-06-18 | 2021-06-18 | Reverse osmosis device suitable for landfill leachate treatment |
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| Publication Number | Publication Date |
|---|---|
| CN216972080U true CN216972080U (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121356920.9U Active CN216972080U (en) | 2021-06-18 | 2021-06-18 | Reverse osmosis device suitable for landfill leachate treatment |
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| CN (1) | CN216972080U (en) |
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2021
- 2021-06-18 CN CN202121356920.9U patent/CN216972080U/en active Active
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