Recycled water efficient utilization method and system

Abstract

The invention discloses an efficient utilization method and system for reclaimed water, and relates to the technical field of reclaimed water treatment. The method comprises the following specific steps: carrying out upgrading operation on tail water of a sewage treatment plant to obtain reclaimed water; introducing the reclaimed water into a pumped storage power station group; the pumped storage power station group comprises a plurality of low-water-head power stations, and the plurality of low-water-head power stations form a cluster for supplying power and re-conveying the reclaimed water; electric energy generated by the pumped storage power station group drives water lifting equipment to lift water to irrigation ditches, and crops are irrigated through the intelligent irrigation system. Reclaimed water is effectively utilized through a low-water-head power generation technology, cyclic utilization of resources is achieved, the utilization rate of the reclaimed water is increased, the requirement for fresh water is reduced, water resource consumption is reduced, meanwhile, water pollution is reduced, and water ecological safety is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of recycled water treatment, and in particular to a method and system for efficiently utilizing recycled water. Background Art

[0002] As a clean, sustainable and renewable energy, hydropower has always been favored in energy development and utilization. Taking urban sewage as the water source, reclaimed water is obtained after proper treatment. Taking full and efficient use of reclaimed water as a breakthrough, choosing an economical, feasible and efficient way to utilize reclaimed water is an important consideration for the development and utilization of hydropower in my country at this stage. In the prior art, the utilization methods of reclaimed water mainly include industrial water, agricultural irrigation, urban non-drinking water and landscape water, etc. The utilization efficiency of reclaimed water is low and energy maximization is not achieved. Therefore, for those skilled in the art, how to achieve efficient utilization of reclaimed water is an urgent problem to be solved. Summary of the invention

[0003] The purpose of the present invention is to provide a method and system for efficiently utilizing recycled water to solve the problems raised in the background technology.

[0004] To achieve the above object, the present invention provides the following scheme: a method for efficient utilization of recycled water, the specific steps of which include the following:

[0005] Raise the tail water standard of the sewage treatment plant to obtain recycled water;

[0006] Introducing the regenerated water into a pumped storage power station group; the pumped storage power station group includes a plurality of low-water-head power stations, and the plurality of low-water-head power stations form a cluster for power supply and re-transportation of the regenerated water;

[0007] The electric energy generated by the pumped storage power station group drives the water-lifting equipment to lift water to the irrigation canal, and irrigates crops through the intelligent irrigation system.

[0008] Preferably, the specific steps of raising the standard of tail water from the sewage treatment plant are:

[0009] The tail water is input into a sewage tank through a sewage inlet pipe, and impurities in the tail water are pre-filtered using a pre-filter in the sewage tank to obtain first tail water;

[0010] The first tail water is transported to a chemical treatment tank through a transport pipeline to perform a chemical catalytic reaction so that the first tail water undergoes a deep nitrogen and phosphorus removal operation to obtain a second tail water;

[0011] The second tail water is transported to a buffer pool, in which a honeycomb filtering and sedimentation net is provided to filter and sediment the second tail water again, and then the regenerated water is output through a drain pipe.

[0012] Preferably, the low-head power station is provided with an intelligent control system, a water turbine, and a permanent magnet generator; wherein, the intelligent control system is used to control the working state of the water turbine, the water turbine is transmission-connected to the input end of the permanent magnet generator, and the water turbine rotates driven by the flow of the regenerated water to drive the permanent magnet generator to generate electricity.

[0013] Preferably, when the voltage generated by the permanent magnet generator reaches the working voltage value of the inverter, the inverter starts to work, and the electric energy generated by the permanent magnet generator is rectified and inverted to obtain electric energy with stable voltage and stable frequency.

[0014] Preferably, the output end of the inverter is also connected to a grid-connected cabinet, which is connected to the power grid. The grid-connected cabinet is used to disconnect from the power grid in time when the power supply of the power grid is abnormal.

[0015] Preferably, the specific steps of irrigating crops through the intelligent irrigation system are:

[0016] Uploading irrigation data, irrigation parameters and working conditions to the server in the intelligent irrigation system;

[0017] Receive the irrigation decision result sent by the server, and control the irrigation terminal and the water tower to perform irrigation according to the irrigation decision result.

[0018] On the other hand, a system for efficient utilization of recycled water is provided, comprising a tailwater treatment module, a hydroelectric power generation module, and a water lifting irrigation module; wherein:

[0019] The tail water treatment module is used to improve the tail water of the sewage treatment plant to obtain recycled water;

[0020] The hydroelectric power generation module is used to introduce the regenerated water into a pumped storage power station group; the pumped storage power station group includes a plurality of low-water-head power stations, and the plurality of low-water-head power stations form a cluster for power supply and re-transportation of the regenerated water;

[0021] The water-lifting irrigation module is used to drive the water-lifting equipment to lift water to the irrigation canal with the electric energy generated by the pumped-storage power station group, and irrigate crops through the intelligent irrigation system.

[0022] Preferably, it also includes a tail water treatment evaluation module for evaluating the water quality of the reclaimed water treated by the tail water treatment module.

[0023] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects: the tail water of the sewage treatment plant is raised to obtain recycled water, and the recycled water is effectively utilized through low-head power generation technology, including power generation and using electric energy for the re-transportation of recycled water, so as to realize the recycling of resources, and then use the electric energy generated by the pumped storage power station group to drive the water-lifting equipment to lift water to the irrigation channel, and irrigate crops through the intelligent irrigation system, so as to realize the efficient utilization of recycled water, and by improving the utilization rate of recycled water, reduce the demand for fresh water, reduce water resource consumption, reduce water pollution, and ensure water ecological safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 is a flow chart of the method of the present invention;

[0026] Figure 2 It is a system structure diagram of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide a method for efficiently utilizing recycled water. Figure 1 As shown, the specific steps include the following:

[0029] S1. Raise the tail water of the sewage treatment plant to obtain recycled water;

[0030] S2. Introducing recycled water into a pumped storage power station group; the pumped storage power station group includes a plurality of low-water-head power stations, and a plurality of low-water-head power stations form a cluster for power supply and re-transportation of recycled water;

[0031] S3. The electricity generated by the pumped storage power station group drives the water-lifting equipment to pump water to the irrigation canal, and irrigates crops through the intelligent irrigation system.

[0032] Furthermore, in step S1, the specific steps of raising the standard of tail water from the sewage treatment plant are as follows:

[0033] S11, inputting tail water into a sewage tank through a sewage inlet pipe, and pre-filtering impurities in the tail water using a pre-filter in the sewage tank to obtain first tail water;

[0034] S12, transporting the first tail water to a chemical treatment tank through a transport pipeline to perform a chemical catalytic reaction so that the first tail water undergoes a deep nitrogen and phosphorus removal operation to obtain a second tail water;

[0035] S13, the second tail water is transported to the buffer pool, and a honeycomb filter sedimentation net is provided in the buffer pool to filter and sediment the second tail water again, and then the regenerated water is output through the drain pipe.

[0036] Low-head power generation technology uses the power of water flow to convert into electrical energy. This technology can not only effectively utilize water resources, but also provide power for the re-transportation of recycled water. Low-head power generation technology is a method of converting water flow power into electrical energy. It has the following characteristics: Clean renewable energy: hydropower is a clean energy that does not produce harmful substances and is environmentally friendly; Efficient use of water resources: Through hydropower generation, water resources can be effectively utilized, especially in areas where water resources are scarce; Comprehensive utilization benefits: hydropower can not only generate electricity, but also be used for the re-transportation of recycled water, realizing the comprehensive utilization of resources.

[0037] Furthermore, the low-head power station is provided with an intelligent control system, a water turbine and a permanent magnet generator; wherein the intelligent control system is used to control the working state of the water turbine, the water turbine is connected to the input end of the permanent magnet generator by transmission, and the water turbine rotates under the drive of the flow of recycled water to drive the permanent magnet generator to generate electricity.

[0038] When the voltage generated by the permanent magnet generator reaches the inverter working voltage value, the inverter starts to work, rectifying and inverting the electric energy generated by the permanent magnet generator to obtain electric energy with stable voltage and stable frequency. The output end of the inverter is also connected to the grid cabinet, which is connected to the power grid. The grid cabinet is used to disconnect from the grid in time when the power supply of the grid is abnormal.

[0039] Furthermore, in step S3, the specific steps of irrigating crops through the intelligent irrigation system are:

[0040] S31, uploading irrigation data, irrigation parameters and working conditions to the server in the intelligent irrigation system;

[0041] S32. Receive the irrigation decision result sent by the server, and control the irrigation terminal and the water tower to irrigate according to the irrigation decision result.

[0042] On the other hand, a system for efficiently utilizing recycled water is provided, such as Figure 2 As shown, it includes tailwater treatment module, hydroelectric power generation module and water lifting irrigation module; wherein,

[0043] Tail water treatment module, used to improve the tail water of the sewage treatment plant to obtain recycled water;

[0044] A hydropower module is used to introduce recycled water into a pumped storage power station group; the pumped storage power station group includes a plurality of low-water-head power stations, and a plurality of low-water-head power stations form a cluster for power supply and re-transport of recycled water;

[0045] The water lifting and irrigation module is used to use the electricity generated by the pumped storage power station group to drive the water lifting equipment to lift water to the irrigation canal, and irrigate crops through the intelligent irrigation system.

[0046] It should be noted that it also includes a tail water treatment evaluation module for evaluating the water quality of the recycled water treated by the tail water treatment module.

[0047] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for efficient utilization of recycled water, characterized in that: The specific steps include the following: Raise the tail water standard of the sewage treatment plant to obtain recycled water; Introducing the regenerated water into a pumped storage power station group; the pumped storage power station group includes a plurality of low-water-head power stations, and the plurality of low-water-head power stations form a cluster for power supply and re-transportation of the regenerated water; The electric energy generated by the pumped storage power station group drives the water-lifting equipment to lift water to the irrigation canal, and irrigates crops through the intelligent irrigation system.

2. A method for efficient utilization of recycled water according to claim 1, characterized in that: The specific steps of raising the standard of tail water from the sewage treatment plant are as follows: The tail water is input into a sewage tank through a sewage inlet pipe, and impurities in the tail water are pre-filtered using a pre-filter in the sewage tank to obtain first tail water; The first tail water is transported to a chemical treatment tank through a transport pipeline to perform a chemical catalytic reaction so that the first tail water undergoes a deep nitrogen and phosphorus removal operation to obtain a second tail water; The second tail water is transported to a buffer pool, in which a honeycomb filtering and sedimentation net is provided to filter and sediment the second tail water again, and then the regenerated water is output through a drain pipe.

3. The method for efficient utilization of recycled water according to claim 1, characterized in that: The low-head power station is provided with an intelligent control system, a water turbine and a permanent magnet generator; wherein the intelligent control system is used to control the working state of the water turbine, the water turbine is transmission-connected to the input end of the permanent magnet generator, and the water turbine rotates under the drive of the water flow of the regenerated water to drive the permanent magnet generator to generate electricity.

4. A method for efficient utilization of recycled water according to claim 3, characterized in that: When the voltage generated by the permanent magnet generator reaches the working voltage value of the inverter, the inverter starts to work, rectifying and inverting the electric energy generated by the permanent magnet generator to obtain electric energy with stable voltage and stable frequency.

5. A method for efficient utilization of recycled water according to claim 4, characterized in that: The output end of the inverter is also connected to a grid-connected cabinet, which is connected to the power grid. The grid-connected cabinet is used to disconnect from the power grid in time when the power supply of the power grid is abnormal.

6. The method for efficient utilization of recycled water according to claim 1, characterized in that: The specific steps for crop irrigation through the intelligent irrigation system are: Uploading irrigation data, irrigation parameters and working conditions to the server in the intelligent irrigation system; Receive the irrigation decision result sent by the server, and control the irrigation terminal and the water tower to perform irrigation according to the irrigation decision result.

7. A system for efficient utilization of recycled water, characterized in that: It includes tailwater treatment module, hydropower generation module and water lifting irrigation module; among which, The tail water treatment module is used to improve the tail water of the sewage treatment plant to obtain recycled water; The hydroelectric power generation module is used to introduce the regenerated water into a pumped storage power station group; the pumped storage power station group includes a plurality of low-water-head power stations, and the plurality of low-water-head power stations form a cluster for power supply and re-transportation of the regenerated water; The water-lifting irrigation module is used to drive the water-lifting equipment to lift water to the irrigation canal with the electric energy generated by the pumped-storage power station group, and irrigate crops through the intelligent irrigation system.

8. The system for efficient utilization of recycled water according to claim 1, characterized in that: It also includes a tail water treatment evaluation module for evaluating the water quality of the regenerated water treated by the tail water treatment module.

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