Distributed brackish water resource utilization system

Abstract

The application discloses a distributed brackish water resource utilization system, comprising: a water taking device, wherein the water takers of the water taking device are distributed in different water body areas and / or different areas of the same water body; a water treatment device integrated in a movable transfer equipment and connected with each water taking device through a pipeline; the water treatment device adjusts water treatment parameters based on the water inlet salinity and the target water outlet salinity; wherein the target water outlet salinity is lower than the salt tolerance threshold of the target irrigation crops, and the difference between the two is maintained within a set range; the water treatment device is also used for outputting the treated water to the target irrigation area with the target irrigation crops, or connecting with a drip irrigation system arranged in the target irrigation area; and a control device is in communication connection with the water treatment device and used for adjusting the water treatment parameters of the water treatment device. The distributed brackish water resource can be efficiently and flexibly utilized.

Description

Technical Field

[0001] This invention relates to the field of water resource utilization equipment, and more specifically, to a distributed brackish water resource utilization system. Background Technology

[0002] Brackish water, as an important unconventional water resource, has significant development potential in agricultural irrigation in water-scarce regions such as the Yellow River Delta, North China, and Northwest China. Effective utilization of dispersed brackish water is crucial for alleviating regional water shortages and ensuring food security. Current policies also encourage the development of brackish water irrigation and desalination models tailored to local conditions.

[0003] To achieve the resource utilization of brackish water, existing technologies have mainly formed two typical schemes: one is a distributed brackish water extraction and improvement system that relies on a pre-buried underground pipe network to collect and treat groundwater through a fixed pipe network; the other is a fixed improvement device that uses a centralized management building to integrate water intake and treatment equipment into a fixed structure. Both schemes attempt to treat brackish water to usable standards through technologies such as membrane desalination.

[0004] However, existing technologies generally rely on fixed water intake facilities and treatment sites, resulting in a lack of system deployment flexibility and making it difficult to adapt to scattered, remote, or topographically complex brackish water resource sites. This fixed system architecture leads to high deployment costs, long deployment cycles, and difficulties in rapid relocation or reuse when facing heterogeneous spatial distribution of resources, thus hindering the economical and efficient large-scale utilization of brackish water in vast water-scarce areas. Therefore, how to provide a brackish water utilization system that can flexibly adapt to distributed resource endowments and achieve rapid deployment has become an urgent technical problem to be solved. Summary of the Invention

[0005] The purpose of this invention is to provide a distributed brackish water resource utilization system that enables efficient and flexible utilization of dispersed brackish water resources.

[0006] The embodiments of the present invention are implemented as follows: This application provides a distributed brackish water resource utilization system, comprising: A water intake device, wherein the water intake device has multiple water intake units distributed in different water body areas and / or different areas of the same water body; A water treatment device is integrated into a mobile transfer device and connected to each of the water intake devices via a pipeline; the water treatment device adjusts water treatment parameters based on the influent salinity and the target product salinity; wherein the target product salinity is lower than the salt tolerance threshold of the target irrigated crop, and the difference between the two is maintained within a set range. The water treatment device is also used to output the treated water to a target irrigation area with the target irrigated crop, or to connect to a drip irrigation system arranged in the target irrigation area; A control device, which is communicatively connected to the water treatment device, is used to adjust the water treatment parameters of the water treatment device.

[0007] In a possible implementation, the water treatment apparatus includes: a pretreatment system and a membrane treatment system; The inlet of the pretreatment system is connected to the outlet of the water intake device, and the outlet is connected to the inlet of the membrane treatment system. The inlet of the membrane treatment system is also connected to the outlet of the water intake device, and the outlet is connected to the drip irrigation system. The control device controls the connection between the water intake device and the pretreatment system and the membrane treatment system based on the amount of impurities in the water taken by the water intake device. Specifically, when the amount of impurities in the water exceeds a first standard value, the water intake device is connected to the pretreatment system and disconnected from the membrane treatment system. When the amount of impurities in the water does not exceed the first standard value, the water intake device is disconnected from the pretreatment system and connected to the membrane treatment system. In a possible implementation, the membrane treatment system further includes: The membrane module has its inlet connected to both the water intake device and the pretreatment system. The water storage tank is connected to the membrane module, the water outlet of the water intake device, and also to the drip irrigation system. The control device further controls the connection between the water intake device and the membrane module and the water storage tank based on the salinity of the water taken by the water intake device; wherein, when the impurities in the water do not exceed the first standard value and the salinity exceeds the second standard value, the water intake device is connected to the membrane module and simultaneously disconnected from the water storage tank; when the impurities in the water do not exceed the first standard value and the salinity does not exceed the second standard value, the water intake device is disconnected from the membrane module and simultaneously connected to the water storage tank. In a possible implementation, the membrane assembly includes: The first filter has its inlet connected to both the water intake device and the pretreatment system. The membrane filter has its inlet connected to the first filter and its outlet connected to the water storage tank. In a possible implementation, the membrane treatment system further includes: A dosing device, connected to the membrane filter, is used to add scale inhibitor to the membrane filter; The membrane cleaning device is equipped with a first cleaning mode and a second cleaning mode; The control device determines the concentration of the scale inhibitor based on the water quality of the input water, and also determines the matching cleaning mode based on the type of membrane fouling; wherein, the type of membrane fouling includes organic fouling and inorganic fouling, which are respectively matched with the first cleaning mode and the second cleaning mode.

[0008] In a possible implementation, the preprocessing system further includes: The second filter has its inlet connected to the outlet of the water intake device. The third filter has its inlet connected to the outlet of the second filter and its outlet connected to the inlet of the first filter.

[0009] In a possible implementation, the membrane treatment system further includes a backwashing device, the inlet of which is connected to the water storage tank, and the outlet of which is connected to the membrane cleaning device, the second filter, and the third filter, respectively.

[0010] In a possible implementation, the water intake device further includes: The first water pump has its inlet connected to each of the water collectors, and its outlet connected to the second filter, the first filter, and the water storage tank, respectively.

[0011] In a possible implementation, the water intake device further includes a water inlet tank; the inlet of the water inlet tank is connected to the outlet of each of the water intake devices, and the outlet is connected to the first water intake pump.

[0012] In a possible implementation, a power supply device is also included, which is electrically connected to the water intake device, the water treatment device, and the control device, respectively; the power supply device is connected to different types of power supply systems, and the control device is also used to control the power supply device to switch between different types of power supply systems; wherein, the power supply system includes a power grid system, a wind power supply system, and a solar power supply system.

[0013] The beneficial effects of the embodiments of the present invention are: This system achieves efficient and flexible utilization of dispersed brackish water resources through distributed water intake and mobile water treatment devices. At the same time, it enables on-demand desalination with the help of intelligent control, significantly reducing energy consumption and operating costs. It is suitable for agricultural irrigation scenarios in water-scarce areas such as the Yellow River Delta, North China, and Northwest China. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an overall system diagram of the distributed brackish water resource utilization system according to an embodiment of the present invention; Figure 2 This is a schematic diagram showing the distribution of water intake devices in a distributed brackish water resource utilization system according to an embodiment of the present invention. Figure 3 This is a schematic diagram of a distributed brackish water resource utilization system for irrigation, as described in an embodiment of the present invention.

[0016] Icons: 1. Water intake device; 11. First inlet pump; 12. Inlet tank; 13. Water collector; 2. Pretreatment system; 21. Second filter; 22. Third filter; 3. Membrane treatment system; 31. Backwashing device; 32. Water storage tank; 33. First filter; 34. Membrane filter; 35. Chemical dosing device; 36. Membrane cleaning device; 4. Target irrigation area; 5. Drip irrigation system; 6. Water treatment device. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Reference Figures 1 to 3 This application provides a distributed brackish water resource utilization system, including a water intake device 1, a water treatment device, and a control device. The water intake device 1 adopts a distributed configuration, meaning it has multiple water collectors 13. These collectors 13 can be located in different water bodies, such as different ponds, wells, or pits, or in different locations within the same water body, such as different areas of a river or coastline. This allows for simultaneous water intake from different water sources or different locations within the same water source, achieving multi-source water supply. The water treatment device is integrated into a transfer device. This transfer device is mobile and can be a transport container or a transport vehicle, allowing for flexible installation in optimal locations based on actual needs. It requires no fixed infrastructure and possesses the ability to be quickly transferred and redeployed, enabling flexible scheduling between different work sites.

[0024] Furthermore, the water treatment device is connected to the water intake device 1's water intake unit 1 via a pipeline. The water intake unit 13 is equipped with a buoyancy device, allowing it to float on the water surface. This device is primarily used to adjust the salinity of the input water. The water treatment device has different water treatment parameters to accommodate different salt tolerance levels in different crops, or different salt tolerance levels in different growth stages of the same crop. Specifically, the water treatment parameters are adjusted based on the influent salinity and the target produced water salinity. The target produced water salinity is lower than the salt tolerance threshold of the target irrigated crop, and the difference between the two is maintained within a set range, which is a small numerical range, such as 0.1 g / kg-0.5 g / kg, thereby avoiding energy waste caused by excessive desalination and achieving precision irrigation. The water treatment device is also used to output the treated water to the target irrigation area 4 containing the target irrigated crop, or to connect to the drip irrigation system 5 arranged within the target irrigation area 4. The control device is communicatively connected to the water treatment device to monitor water quality parameters in real time and adjust the water treatment parameters of the water treatment device to ensure that the produced water salinity is stable and meets the crop's needs.

[0025] This system achieves efficient and flexible utilization of dispersed brackish water resources through distributed water intake and mobile water treatment devices. At the same time, it enables on-demand desalination with the help of intelligent control, significantly reducing energy consumption and operating costs. It is suitable for agricultural irrigation scenarios in water-scarce areas such as the Yellow River Delta, North China, and Northwest China.

[0026] In an optional embodiment, the water treatment device includes a pretreatment system 2 and a membrane treatment system 3. The inlet of the pretreatment system 2 is connected to the outlet of the water intake device 1, and the outlet is connected to the inlet of the membrane treatment system 3. The inlet of the membrane treatment system 3 is also connected to the outlet of the water intake device 1, and the outlet is connected to the drip irrigation system 5. The control device controls the connection between the water intake device 1 and the pretreatment system 2 and the membrane treatment system 3 based on the amount of impurities in the water taken by the water intake device 1. Specifically, when the amount of suspended solids, colloids, and other impurities in the water exceeds a first standard value (e.g., turbidity > 5 NTU or suspended solids concentration > 10 mg / L), the control device controls the water intake device 1 to connect to the pretreatment system 2, and simultaneously controls the water intake device 1 to disconnect from the membrane treatment system 3, so that the raw water is first filtered and purified by the pretreatment system 2 to protect the subsequent membrane modules. When the impurities in the water do not exceed the first standard value, the control device controls the water intake device 1 to disconnect from the pretreatment system 2, and at the same time controls the water intake device 1 to connect with the membrane treatment system 3, so that the raw water directly enters the membrane treatment system 3, reducing process resistance and energy consumption.

[0027] In an optional embodiment, the membrane treatment system 3 further includes a membrane module and a water storage tank 32. The inlet of the membrane module is connected to the water intake device 1 and the pretreatment system 2, respectively. The water storage tank 32 is connected to the outlet of the membrane module and the water intake device 1, and is also connected to the drip irrigation system 5. The control device also controls the connection between the water intake device 1 and the membrane module and the water storage tank 32 based on the salinity of the water taken by the water intake device 1. When the impurities in the water do not exceed the first standard value and the salinity exceeds the second standard value (e.g., conductivity > 3 mS / cm, corresponding to a mineralization of about 1.5 g / L), the control device controls the water intake device 1 to connect to the membrane module, and simultaneously controls the water intake device 1 to disconnect from the water storage tank 32, allowing the water to enter the membrane module for desalination treatment. When the impurities in the water do not exceed the first standard value and the salinity does not exceed the second standard value, the control device controls the water intake device 1 to disconnect from the membrane module, and simultaneously controls the water intake device 1 to connect to the water storage tank 32, allowing the water to directly enter the water storage tank 32 for use as qualified irrigation water, avoiding unnecessary membrane treatment energy consumption.

[0028] In an optional embodiment, the membrane module includes a first filter 33 and a membrane filter 34. The inlet of the first filter 33 is connected to both the water intake device 1 and the pretreatment system 2, and may be a security filter for security filtration of the influent to further remove fine particulate matter. The inlet of the membrane filter 34 is connected to the first filter 33, and the outlet is connected to the water storage tank 32. The membrane filter 34 may be a nanofiltration (NF) membrane or a reverse osmosis (RO) membrane, which is automatically selected or used in combination based on the influent salinity, salt composition, and target product water salinity. For example, for influent with high salinity (e.g., mineralization > 2.5 g / L), the RO membrane can be used preferentially; for influent with medium salinity or a high proportion of divalent salts, an NF membrane can be used to reduce operating pressure and energy consumption.

[0029] In an optional embodiment, the membrane module further includes a dosing device 35 and a membrane cleaning device 36. The dosing device 35 is connected to the membrane filter 34 and is used to add antiscalant to the membrane filter 34 to prevent scaling on the membrane surface. The control device automatically calculates and adjusts the concentration of the antiscalant based on the water quality parameters of the input water (such as hardness, alkalinity, recovery rate, etc.). The membrane cleaning device 36 has a first cleaning mode and a second cleaning mode, targeting organic fouling and inorganic fouling respectively. For organic fouling (such as organic colloids), alkaline substances (such as sodium hydroxide) can be used for rapid cleaning; for inorganic fouling (such as calcium carbonate), acidic substances (such as hydrochloric acid) can be used for rapid cleaning. The control device determines the appropriate cleaning mode based on the type of membrane fouling (e.g., by monitoring the rate of decrease in membrane flux and the upward trend of differential pressure) and automatically initiates the cleaning program to restore membrane performance.

[0030] In an optional embodiment, the pretreatment system 2 further includes a second filter 21 and a third filter 22. The inlet of the second filter 21 is connected to the outlet of the water intake device 1, and is, for example, a quartz sand filter, for removing suspended solids and colloids. The inlet of the third filter 22 is connected to the outlet of the second filter 21, and the outlet is connected to the inlet of the first filter 33, and is, for example, an activated carbon filter, for adsorbing organic matter, off-colors and odors, and residual chlorine. The two-stage filtration system, connected in series, effectively improves the quality of the incoming water and extends the membrane's lifespan.

[0031] In an optional embodiment, the system further includes a backwashing device 31. The inlet of the backwashing device 31 is connected to a water storage tank 32, and its outlet is connected to a membrane cleaning device 36, a second filter 21, and a third filter 22, respectively. When a filter needs cleaning, the backwashing device 31 pumps clean or mixed water from the water storage tank 32 back into the corresponding device for physical backwashing to restore its filtration performance. When a membrane module needs cleaning, the backwashing device 31 pumps clean or mixed water from the water storage tank 32 back into a membrane cleaning water tank, and chemically cleans it by adding chemicals to restore its filtration performance.

[0032] In an optional embodiment, the water intake device 1 further includes a first inlet pump 11 and an inlet tank 12. The inlet of the first inlet pump 11 is connected to the inlet tank 12, and the outlet is connected to the second filter 21, the first filter 33, and the water storage tank 32, respectively, to provide water supply power. The inlet of the inlet tank 12 is connected to the outlet of each water collector 13, and the outlet is connected to the first inlet pump 11, serving as a buffer and homogenizer to mitigate the impact of water quality fluctuations on subsequent treatment units. Furthermore, the inlet tank 12 is connected to multiple (potentially all) water collectors 13, enabling the acquisition of water from different locations, thereby mixing water with different salinities to achieve the purpose of adjusting the salinity of the input water. For example, two water collectors 13 can respectively acquire water with low salinity and water with high salinity. By controlling the input of a larger flow rate of low-salinity water while simultaneously inputting a smaller flow rate of high-salinity water, the salinity can be quickly adjusted.

[0033] In an optional embodiment, the system further includes a power supply unit electrically connected to the water intake device 1, the water treatment device, and the control device. The power supply unit is connected to different types of power supply systems, including a power grid system, a wind power supply system, and a solar power supply system. The control device is also used to control the power supply unit to switch between different types of power supply systems, prioritizing the use of renewable energy sources such as wind and solar power, or operating during off-peak hours of the power grid to reduce operating costs. The power supply unit can automatically schedule power according to energy availability and cost to optimize energy utilization.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A distributed brackish water resource utilization system, characterized in that, include: A water intake device, wherein the water intake device has multiple water intake units distributed in different water body areas and / or different areas of the same water body; A water treatment device is integrated into a mobile transfer device and connected to each of the water intake devices via a pipeline; the water treatment device adjusts water treatment parameters based on the influent salinity and the target product salinity; wherein the target product salinity is lower than the salt tolerance threshold of the target irrigated crop, and the difference between the two is maintained within a set range. The water treatment device is also used to output the treated water to a target irrigation area with the target irrigated crop, or to connect to a drip irrigation system arranged in the target irrigation area; A control device, which is communicatively connected to the water treatment device, is used to adjust the water treatment parameters of the water treatment device.

2. The distributed brackish water resource utilization system according to claim 1, characterized in that, The water treatment device includes: a pretreatment system and a membrane treatment system; The inlet of the pretreatment system is connected to the outlet of the water intake device, and the outlet is connected to the inlet of the membrane treatment system. The inlet of the membrane treatment system is also connected to the outlet of the water intake device, and the outlet is connected to the drip irrigation system. The control device controls the connection between the water intake device and the pretreatment system and the membrane treatment system based on the amount of impurities in the water taken by the water intake device. Specifically, when the amount of impurities in the water exceeds a first standard value, the water intake device is connected to the pretreatment system and disconnected from the membrane treatment system. When the amount of impurities in the water does not exceed the first standard value, the water intake device is disconnected from the pretreatment system and connected to the membrane treatment system.

3. The distributed brackish water resource utilization system according to claim 2, characterized in that, The membrane treatment system further includes: The membrane module has its inlet connected to both the water intake device and the pretreatment system. The water storage tank is connected to the membrane module, the water outlet of the water intake device, and also to the drip irrigation system. The control device further controls the connection between the water intake device and the membrane module and the water storage tank based on the salinity of the water taken by the water intake device; wherein, when the impurities in the water do not exceed the first standard value and the salinity exceeds the second standard value, the water intake device is connected to the membrane module and simultaneously disconnected from the water storage tank; when the impurities in the water do not exceed the first standard value and the salinity does not exceed the second standard value, the water intake device is disconnected from the membrane module and simultaneously connected to the water storage tank.

4. The distributed brackish water resource utilization system according to claim 3, characterized in that, The membrane assembly includes: The first filter has its inlet connected to both the water intake device and the pretreatment system. The membrane filter has its inlet connected to the first filter and its outlet connected to the water storage tank.

5. The distributed brackish water resource utilization system according to claim 4, characterized in that, The membrane treatment system further includes: A dosing device, connected to the membrane filter, is used to add scale inhibitor to the membrane filter; The membrane cleaning device is equipped with a first cleaning mode and a second cleaning mode; The control device determines the concentration of the scale inhibitor based on the water quality of the input water, and also determines the matching cleaning mode based on the type of membrane fouling; wherein, the type of membrane fouling includes organic fouling and inorganic fouling, which are respectively matched with the first cleaning mode and the second cleaning mode.

6. The distributed brackish water resource utilization system according to claim 5, characterized in that, The preprocessing system also includes: The second filter has its inlet connected to the outlet of the water intake device. The third filter has its inlet connected to the outlet of the second filter and its outlet connected to the inlet of the first filter.

7. The distributed brackish water resource utilization system according to claim 6, characterized in that, The membrane treatment system also includes a backwashing device, the inlet of which is connected to the water storage tank, and the outlet of which is connected to the membrane cleaning device, the second filter, and the third filter, respectively.

8. The distributed brackish water resource utilization system according to claim 6, characterized in that, The water intake device also includes: The first water pump has its inlet connected to each of the water collectors, and its outlet connected to the second filter, the first filter, and the water storage tank, respectively.

9. The distributed brackish water resource utilization system according to claim 8, characterized in that, The water intake device further includes a water inlet tank; the inlet of the water inlet tank is connected to the outlet of each of the water intake devices, and the outlet is connected to the first water inlet pump.

10. The distributed brackish water resource utilization system according to claim 1, characterized in that, It also includes a power supply device, which is electrically connected to the water intake device, the water treatment device, and the control device respectively; the power supply device is connected to different types of power supply systems respectively, and the control device is also used to control the power supply device to switch between different types of power supply systems; wherein, the power supply system includes a power grid system, a wind power supply system, and a solar power supply system.

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