Leachate membrane group pipeline system capable of reducing cost and improving efficiency

Abstract

The utility model belongs to the technical field of leachate treatment, and particularly relates to a cost-reducing and efficiency-improving leachate membrane group pipeline system which comprises an ultrafiltration system, a nanofiltration system, an RO (reverse osmosis) concentrated water tank and a humic acid tank, the ultrafiltration system is used for performing ultrafiltration treatment on water from a biochemical tank, and the generated concentrated water flows back to the biochemical tank; the produced water is divided into two branches which respectively enter the nanofiltration system and the RO concentrated water tank; concentrated water generated by the nanofiltration system enters the multi-stage membrane concentration system, produced water enters the reverse osmosis system, concentrated water generated by the multi-stage membrane concentration system enters the humic acid tank and / or the RO concentrated water tank, produced water enters the reverse osmosis system, concentrated water generated by the reverse osmosis system enters the RO concentrated water tank, and produced clear water enters the RO clear water tank. According to the utility model, branch transformation is carried out on the water inlet pipeline from the water produced by the ultrafiltration system to the nanofiltration system, so that the problems that the concentrated water yield of the landfill leachate treatment process in the prior art is low, the requirement of a party A on a large amount of concentrated water cannot be met, the treatment process is not flexible enough, and the adjusting capacity is poor are solved.

Description

Technical Field

[0001] This utility model belongs to the field of leachate treatment technology, and in particular relates to a cost-effective and efficiency-enhancing leachate membrane module pipeline system. Background Technology

[0002] The landfill leachate treatment project adopts the UASB+MBR+UF+NF+RO process, with final product water consisting of RO purified water, RO concentrate, and humic acid solution produced by the membrane materials. The maximum UF permeate capacity is 300 m³ / day, with an average daily RO purified water production of 90 m³ / day, concentrate production of 50 m³ / day, and humic acid solution production of 15 m³ / day. The client's recycled water is divided into purified water, concentrate, and humic acid solution for recirculation. The average daily production of purified water is 75 m³ / day, the average daily production of concentrate is 150 m³ / day, while humic acid recirculation is only required during the summer and autumn seasons, averaging 45 m³ / day.

[0003] Current landfill leachate treatment technologies produce low concentrate yields, failing to meet the large-scale demands of clients. Furthermore, the processes lack flexibility and have poor adjustability. Therefore, it is necessary to design a cost-effective and efficient leachate membrane module pipeline system to address these technical problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the concentrate output of the existing landfill leachate treatment process is low, which cannot meet the large demand of the client for concentrate. Moreover, the treatment process is not flexible enough and has poor adjustment capability. In view of the above-mentioned defects of the existing technology, a cost-reducing and efficiency-enhancing leachate membrane module pipeline system is provided.

[0005] The technical solution adopted by this utility model to solve this problem is:

[0006] A cost-effective and efficiency-enhancing leachate membrane pipeline system includes an ultrafiltration system, a nanofiltration system, an RO concentrate tank, and a humic acid tank, wherein:

[0007] The ultrafiltration system treats the water from the biological treatment tank by ultrafiltration, and the concentrated water produced is returned to the biological treatment tank. Its product water branches into two streams, which enter the nanofiltration system and the RO concentrate tank respectively.

[0008] The nanofiltration system produces concentrated water that enters a multi-stage membrane concentration system, and its permeate enters a reverse osmosis system. Specifically, the concentrated water produced by the multi-stage membrane concentration system enters a humic acid tank and / or an RO concentrate tank, the permeate enters the reverse osmosis system, the concentrated water produced by the reverse osmosis system enters an RO concentrate tank, and the purified water produced enters an RO purified water tank.

[0009] In the above technical solution, the water output end of the ultrafiltration system is connected to the input ends of the nanofiltration system and the RO concentrate tank respectively through the first pipeline valve. The water output end of the nanofiltration system is connected to the input end of the reverse osmosis system through a pipeline.

[0010] In the above technical solution, the multi-stage membrane concentration system includes at least two stages of membrane concentration systems connected in parallel and / or in series.

[0011] In the above technical solution, the multi-stage membrane concentration system includes a primary membrane concentration system and a secondary membrane concentration system. The concentrate output end of the nanofiltration system is connected to the input end of the primary membrane concentration system through a pipeline. The permeate output end of the primary membrane concentration system is connected to the input end of the secondary membrane concentration system through a pipeline. The permeate output end of the secondary membrane concentration system is connected to the pipeline between the reverse osmosis system and the nanofiltration system through a pipeline.

[0012] In the above technical solution, the concentrate output end of the primary membrane concentration system is connected to the input ends of the RO concentrate tank and the humic acid tank respectively through two pipelines via a second pipeline valve.

[0013] In the above technical solution, the concentrate output end of the reverse osmosis system is connected to the input end of the RO concentrate tank through a pipeline, and the clear water output end of the reverse osmosis system is connected to the input end of the RO clear water tank through a pipeline.

[0014] In the above technical solution, the concentrate output end of the secondary membrane concentration system is connected to the input end of the RO concentrate tank through a pipeline.

[0015] In the above technical solution, the RO concentrate tank and the humic acid tank are connected by a pipeline, and a submersible pump is installed on the pipeline between the RO concentrate tank and the humic acid tank.

[0016] The above technical solution also includes an ultrafiltration liquid tank, a nanofiltration liquid tank, a nanofiltration concentrate tank, and an intermediate water tank. The permeate water of the ultrafiltration system flows into the ultrafiltration liquid tank, and the liquid in the ultrafiltration liquid tank flows into the nanofiltration system through the nanofiltration feed water pump. The permeate water of the nanofiltration system flows into the nanofiltration liquid tank, and the liquid in the nanofiltration liquid tank is used to supply water to the reverse osmosis system.

[0017] In the above technical solution, the concentrated water produced by the nanofiltration system flows into the nanofiltration concentrate tank, the liquid in the nanofiltration concentrate tank is used to supply water to the primary membrane concentration system, the permeate from the primary membrane concentration system flows into the intermediate water tank, the liquid in the intermediate water tank is used to supply water to the secondary membrane concentration system, and the permeate from the secondary membrane concentration system flows into the nanofiltration clarifying liquid tank.

[0018] The advantages and positive effects of this utility model are:

[0019] 1. This utility model provides a cost-effective leachate membrane pipeline system. By branching the pipeline from the ultrafiltration system permeate to the nanofiltration system inlet, the ultrafiltration permeate is directly discharged to the RO concentrate tank, increasing the concentrate production and meeting the client's large demand for concentrate. This modification improves the system's flexibility and response speed. Furthermore, the branching modification of the humic acid production pipeline allows the humic acid solution from the humic acid tank to be discharged into the appropriate tank according to demand, increasing the system's adjustment capability. This solves the problems of low concentrate production in existing landfill leachate treatment processes, which cannot meet the client's large demand for concentrate, and the lack of flexibility and poor adjustment capability of the treatment process.

[0020] 2. This utility model provides a cost-effective and efficiency-enhancing leachate membrane module pipeline system. A submersible pump is installed in the RO concentrate tank to lead the pipeline to the humic acid tank. This modification improves the utilization rate of concentrate and provides a solution for replenishing humic acid solution. Attached Figure Description

[0021] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of this utility model. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural construction described herein and are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of a preferred embodiment of a cost-reducing and efficiency-enhancing leachate membrane module pipeline system provided by this utility model.

[0023] The following are the labels in the diagram: 1. Ultrafiltration system; 2. First pipeline valve; 3. Nanofiltration system; 4. Reverse osmosis system; 5. RO clear water tank; 6. First-stage membrane concentration system; 7. Second pipeline valve; 8. Second-stage membrane concentration system; 9. RO concentrate tank; 10. Humic acid tank; 11. Submersible pump. Detailed Implementation

[0024] First, it should be noted that the specific structure, features, and advantages of this utility model will be described in detail below by way of examples. However, all descriptions are for illustrative purposes only and should not be construed as limiting the utility model in any way. Furthermore, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the accompanying drawings, can still be arbitrarily combined or deleted among these technical features (or their equivalents) to obtain more other embodiments of this utility model that may not be directly mentioned herein. Additionally, for the sake of simplifying the drawings, the same or similar technical features may be indicated only in one place in the same drawing.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," and "screw-on" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The utility model will now be described in detail with reference to the accompanying drawings. Example 1

[0026] A cost-effective and efficiency-enhancing leachate membrane pipeline system includes an ultrafiltration system 1, a nanofiltration system 3, an RO concentrate tank 9, and a humic acid tank 10. The ultrafiltration system 1 treats water from a biological treatment tank by ultrafiltration, and the concentrate produced is returned to the biological treatment tank. Its permeate is branched into two streams, which enter the nanofiltration system 3 and the RO concentrate tank 9 respectively. The nanofiltration system 3 produces a multi-stage membrane concentration system, and its permeate enters a reverse osmosis system 4. The concentrate produced by the multi-stage membrane concentration system enters the humic acid tank 10 and / or the RO concentrate tank 9, and the permeate enters the reverse osmosis system 4. The concentrate produced by the reverse osmosis system 4 enters the RO concentrate tank 9, and the purified water produced enters the RO purified water tank 5.

[0027] In this embodiment, the ultrafiltration system 1 collects water from the biological treatment tank and treats the water from the biological treatment tank by ultrafiltration. The ultrafiltration concentrate is returned to the biological treatment tank as sludge. The ultrafiltration permeate flows into the nanofiltration system 3 and the RO concentrate tank 9. By branching the inlet pipe from the ultrafiltration system 1 to the nanofiltration system 3, the ultrafiltration permeate is directly discharged to the RO concentrate tank 9, increasing the concentrate production and meeting the client's large demand for concentrate. This modification improves the system's flexibility and response speed. Moreover, the branching modification of the humic acid production pipeline of the material membrane allows the humic acid liquid in the humic acid tank 10 to be discharged into the corresponding tank according to demand, increasing the system's adjustment capability. This solves the problems of low concentrate production in the existing landfill leachate treatment process, which cannot meet the client's large demand for concentrate, and the treatment process is not flexible enough and has poor adjustment capability.

[0028] Furthermore, in this embodiment, the product water output end of the ultrafiltration system 1 can be connected to the input ends of the nanofiltration system 3 and the RO concentrate tank 9 respectively through the first pipeline valve 2. The product water output end of the nanofiltration system 3 can be connected to the input end of the reverse osmosis system 4 through a pipeline.

[0029] Furthermore, in this embodiment, the multi-stage membrane concentration system may include at least two stages of membrane concentration systems connected in parallel and / or in series.

[0030] Furthermore, in this embodiment, the multi-stage membrane concentration system may include a primary membrane concentration system 6 and a secondary membrane concentration system 8. The concentrate output of the nanofiltration system 3 is connected to the input of the primary membrane concentration system 6 via a pipeline. The permeate output of the primary membrane concentration system 6 is connected to the input of the secondary membrane concentration system 8 via a pipeline. The permeate output of the secondary membrane concentration system 8 is connected to the pipeline between the reverse osmosis system 4 and the nanofiltration system 3 via a pipeline.

[0031] Furthermore, in this embodiment, the concentrate output of the primary membrane concentration system 6 can be connected to the input of the RO concentrate tank 9 and the humic acid tank 10 via two separate pipelines via the second pipeline valve 7. For example... Figure 1 As shown, the ultrafiltration system 1 is connected to the nanofiltration system 3 and the RO concentrate tank 9 via the first pipeline valve 2. The nanofiltration system 3 is connected to the primary membrane concentration system 6 via a pipeline. The primary membrane concentration system 6 is connected to the RO concentrate tank 9 and the humic acid tank 10 via the second pipeline valve 7. The nanofiltration system 3 is connected to the reverse osmosis system 4 via a pipeline. The pipeline connecting the reverse osmosis system 4 and the nanofiltration system 3 is connected to the secondary membrane concentration system 8.

[0032] Furthermore, in this embodiment, the reverse osmosis system 4 and the RO concentrate tank 9 are connected by a pipeline, and the reverse osmosis system 4 is also connected to the RO clear water tank 5 by a pipeline, such as... Figure 1 As shown, the concentrate output end of the reverse osmosis system 4 is connected to the input end of the RO concentrate tank 9 through a pipe, and the clear water output end of the reverse osmosis system 4 is connected to the input end of the RO clear water tank 5 through a pipe.

[0033] Furthermore, in this embodiment, the secondary membrane concentration system 8 can be connected to the RO concentrate tank 9 via a pipeline, and the secondary membrane concentration system 8 can be connected to the primary membrane concentration system 6 via a pipeline, such as... Figure 1 As shown, the concentrate output of the secondary membrane concentration system 8 is connected to the input of the RO concentrate tank 9 via a pipeline.

[0034] Furthermore, in this embodiment, the RO concentrate tank 9 and the humic acid tank 10 are connected by a pipeline. A submersible pump 11 is installed on the pipeline between the RO concentrate tank 9 and the humic acid tank 10. Installing the submersible pump 11 in the RO concentrate tank 9 and leading the pipeline to the humic acid tank 10 improves the utilization rate of the concentrate and provides a solution for replenishing the humic acid solution. Example 2

[0035] A cost-reducing and efficiency-enhancing permeate membrane pipeline system includes an ultrafiltration system 1, a nanofiltration system 3, an RO concentrate tank 9, and a humic acid tank 10. It also includes an ultrafiltration clarified liquid tank, a nanofiltration clarified liquid tank, a nanofiltration concentrated liquid tank, and an intermediate water tank. The permeate from the ultrafiltration system 1 flows into the ultrafiltration clarified liquid tank. The liquid in the ultrafiltration clarified liquid tank flows into the nanofiltration system 3 via a nanofiltration feed pump. The permeate from the nanofiltration system 3 flows into the nanofiltration clarified liquid tank, and the liquid in the nanofiltration clarified liquid tank is used to supply water to the reverse osmosis system 4. The concentrated water produced by the nanofiltration system 3 flows into the nanofiltration concentrated liquid tank, and the liquid in the nanofiltration concentrated liquid tank is used to supply water to the primary membrane concentration system 6. The permeate from the primary membrane concentration system 6 flows into the intermediate water tank, and the liquid in the intermediate water tank is used to supply water to the secondary membrane concentration system 8. The permeate from the secondary membrane concentration system 8 flows into the nanofiltration clarified liquid tank.

[0036] A method for reducing costs and increasing efficiency in a leachate membrane module piping system includes the following steps:

[0037] S1. Ultrafiltration system 1 treats water from the biological treatment tank by ultrafiltration. The ultrafiltration concentrate is returned to the biological treatment tank as sludge return. The ultrafiltration permeate flows into the ultrafiltration clear liquid tank for further treatment.

[0038] S2. The ultrafiltration solution tank flows into the nanofiltration system 3 through the nanofiltration feed water pump. The product water of the nanofiltration system 3 flows into the nanofiltration solution tank, and this water is used as the feed water of the reverse osmosis system 4.

[0039] S3. The concentrated water produced by nanofiltration system 3 flows into nanofiltration concentrate tank and serves as the feed water for primary membrane concentration system 6. The permeate from primary membrane concentration system 6 flows into intermediate water tank and serves as the feed water for secondary membrane concentration system 8. The concentrated water from primary membrane concentration system 6 flows into humic acid tank 10, and a second pipeline valve 7 is installed on this water pipe to introduce it into RO concentrate tank 9. This water is used by the client for pulping and reflow.

[0040] S4. By manually switching the flow direction of the concentrate from the primary membrane concentration system 6, the concentrate flows into the secondary membrane concentration system 8. The permeate from the secondary membrane concentration system 8 flows into the nanofiltration clear liquid tank. This water is used as the feed water for the reverse osmosis system 4. The concentrate produced flows into the RO concentrate tank 9. The reverse osmosis system 4 is the final stage of the membrane module. The clear water produced flows into the RO clear water tank 5, and the concentrate produced flows into the RO concentrate tank 9.

[0041] S5. A connecting pipe, valve and submersible pump 11 are installed between the humic acid tank 10 and the RO concentrate tank 9. The concentrate in the RO concentrate tank 9 can be flowed into the humic acid tank 10 as needed, and this water can be used as the humic acid solution for the client to return.

[0042] In this embodiment, the ultrafiltration system 1 treats the water from the biological treatment tank using ultrafiltration. The concentrated water is returned to the biological treatment tank, and the ultrafiltration permeate flows into the ultrafiltration clarifying tank. The ultrafiltration clarifying tank then flows into the nanofiltration system 3 via the nanofiltration feed pump. The permeate from the nanofiltration system 3 flows into the nanofiltration clarifying tank, which serves as the feed water for the reverse osmosis system 4. The concentrated water produced by the nanofiltration system 3 flows into the nanofiltration concentrate tank, which serves as the feed water for the first-stage membrane concentration system 6. The permeate from the first-stage membrane concentration system 6 flows into the intermediate water tank, which serves as the feed water for the second-stage membrane concentration system 8. The concentrated water from the first-stage membrane concentration system 6 flows into the humic acid tank 10, and a second pipeline valve 7 is installed on this water pipe to introduce it into the RO concentrate tank 9. This water is used for the client's pulping and refluxing. The flow direction of the concentrate from the primary membrane concentration system 6 is switched by a manual valve, flowing into the secondary membrane concentration system 8. The permeate from the secondary membrane concentration system 8 flows into the nanofiltration clarified liquid tank. This water is used as the feed water for the reverse osmosis system 4, and the resulting concentrate flows into the RO concentrate tank 9. The reverse osmosis system 4, as the final stage of the membrane module, produces clean water that flows into the RO clean water tank 5 and concentrate that flows into the RO concentrate tank 9. A connecting pipe, valve, and submersible pump 11 are installed between the humic acid tank 10 and the RO concentrate tank 9. The concentrate in the RO concentrate tank 9 can be flowed into the humic acid tank 10 as needed, and this water is used for the client's humic acid refluxing.

[0043] In summary, this invention, by branching the pipeline from the ultrafiltration system's permeate water to the nanofiltration system's inlet water, enables the direct discharge of ultrafiltration permeate water to the RO concentrate tank, increasing concentrate production and meeting the client's large demand for concentrate. This modification improves the system's flexibility and response speed. Furthermore, the branching modification of the humic acid production pipeline allows the humic acid solution from the humic acid tank to be discharged into the appropriate tank according to demand, increasing the system's regulatory capacity.

[0044] The above embodiments have provided a detailed description of the present invention, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made in accordance with the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A cost-reducing and efficiency-enhancing leachate membrane pipeline system, comprising an ultrafiltration system (1), a nanofiltration system (3), an RO concentrate tank (9), and a humic acid tank (10), characterized in that: The ultrafiltration system (1) treats the water from the biological treatment tank by ultrafiltration, and the concentrated water produced is returned to the biological treatment tank. Its water production branches into two streams, which enter the nanofiltration system (3) and the RO concentrated water tank (9) respectively. The nanofiltration system (3) produces concentrated water that enters a multi-stage membrane concentration system and permeate that enters a reverse osmosis system (4). The concentrated water produced by the multi-stage membrane concentration system enters a humic acid tank (10) and / or an RO concentrate tank (9). The permeate enters the reverse osmosis system (4). The concentrated water produced by the reverse osmosis system (4) enters the RO concentrate tank (9). The clear water produced enters the RO clear water tank (5).

2. The cost-reducing and efficiency-enhancing leachate membrane module piping system according to claim 1, characterized in that: The ultrafiltration system (1) has its water output end connected to the nanofiltration system (3) and the RO concentrate tank (9) via two separate pipelines through the first pipeline valve (2). The water output end of the nanofiltration system (3) is connected to the input end of the reverse osmosis system (4) via a pipeline.

3. The cost-reducing and efficiency-enhancing leachate membrane module piping system according to claim 1, characterized in that: The multi-stage membrane concentration system includes at least two stages of membrane concentration systems connected in parallel and / or in series.

4. The cost-reducing and efficiency-enhancing leachate membrane module piping system according to claim 3, characterized in that: The multi-stage membrane concentration system includes a primary membrane concentration system (6) and a secondary membrane concentration system (8). The concentrate output end of the nanofiltration system (3) is connected to the input end of the primary membrane concentration system (6) through a pipe. The permeate output end of the primary membrane concentration system (6) is connected to the input end of the secondary membrane concentration system (8) through a pipe. The permeate output end of the secondary membrane concentration system (8) is connected to the pipeline between the reverse osmosis system (4) and the nanofiltration system (3) through a pipe.

5. The cost-reducing and efficiency-enhancing leachate membrane module piping system according to claim 4, characterized in that: The concentrated water output end of the primary membrane concentration system (6) is connected to the input ends of the RO concentrated water tank (9) and the humic acid tank (10) respectively through the second pipeline valve (7).

6. The cost-reducing and efficiency-enhancing leachate membrane module piping system according to claim 5, characterized in that: The concentrated water output end of the reverse osmosis system (4) is connected to the input end of the RO concentrated water tank (9) through a pipe, and the clear water output end of the reverse osmosis system (4) is connected to the input end of the RO clear water tank (5) through a pipe.

7. The cost-reducing and efficiency-enhancing leachate membrane module piping system according to claim 5, characterized in that: The concentrate output end of the secondary membrane concentration system (8) is connected to the input end of the RO concentrate tank (9) via a pipeline.

8. The cost-reducing and efficiency-enhancing leachate membrane module piping system according to claim 1, characterized in that: The RO concentrate tank (9) and the humic acid tank (10) are connected by a pipeline, and a submersible pump (11) is installed on the pipeline between the RO concentrate tank (9) and the humic acid tank (10).

9. A cost-reducing and efficiency-enhancing leachate membrane module piping system according to claim 5, characterized in that: It also includes an ultrafiltration liquid tank, a nanofiltration liquid tank, a nanofiltration concentrate tank and an intermediate water tank. The permeate water of the ultrafiltration system (1) flows into the ultrafiltration liquid tank. The liquid in the ultrafiltration liquid tank flows into the nanofiltration system (3) through the nanofiltration feed water pump. The permeate water of the nanofiltration system (3) flows into the nanofiltration liquid tank. The liquid in the nanofiltration liquid tank is used to supply water to the reverse osmosis system (4).

10. A cost-reducing and efficiency-enhancing leachate membrane module piping system according to claim 9, characterized in that: The concentrated water produced by the nanofiltration system (3) flows into the nanofiltration concentrate tank. The liquid in the nanofiltration concentrate tank is used to supply water to the primary membrane concentration system (6). The permeate from the primary membrane concentration system (6) flows into the intermediate water tank. The liquid in the intermediate water tank is used to supply water to the secondary membrane concentration system (8). The permeate from the secondary membrane concentration system (8) flows into the nanofiltration clear liquid tank.

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