Rainwater purification and salt isolation and reuse device for saline-alkali soil

Abstract

This utility model discloses a rainwater purification and salinity-isolation reuse device for saline-alkali land, including a rainwater collection component and a rainwater purification component. The rainwater collection component includes a collection chamber connected to a main pipe, which forms a 30° angle with the horizontal line and slopes upwards at the end furthest from the collection chamber. Several collection branch pipes extending to the ground are connected to the main pipe. A vortex funnel is located near the lower end of the collection chamber, and a sludge collection chamber is connected below the collection chamber. The rainwater purification component includes a primary filter chamber and a water collection chamber connected to the collection chamber. The primary filter chamber contains multiple gravel layers. An installation column is rotatably installed inside the water collection chamber, and several packing plates are inserted on the outside of the installation column, filled with activated carbon packing. This utility model prevents rainwater from flowing into surrounding water systems and becoming unusable saline water due to a lack of retention measures. The rainwater storage facility has a salinity-isolation function. During the flood season, rainwater is collected and temporarily stored, and reused for irrigation during the dry season, improving the rainwater utilization rate of saline-alkali farmland.

Description

Technical Field

[0001] This utility model relates to the field of saline-alkali land management technology, specifically to a device for purifying, separating, and reusing rainwater from saline-alkali land. Background Technology

[0002] In saline-alkali areas, excessively high concentrations of salt and alkaline substances in the soil lead to deterioration of soil physicochemical properties and reduced crop yields. Traditional treatment relies on large-scale freshwater flushing to reduce salinity and alkali deposits, but these areas often face a freshwater supply-demand imbalance. In the Yellow River Delta saline-alkali region, extreme weather events are frequent, with rainfall concentrated in certain periods (70% from July to September). Short-duration heavy rainfall does not have enough time to infiltrate and quickly flows into surrounding water systems, becoming unusable saline water, resulting in a rainwater utilization rate of less than 20%. Rainwater, as a natural free water source, can alleviate regional freshwater shortages and provide a sustainable water resource guarantee for saline-alkali land improvement and stable grain production if collected, utilized, and systematically regulated.

[0003] Current technologies for rainwater infiltration control utilize rain gardens, bioretention ponds, and pits to intercept rainwater and leach surface soil salts. Excessive infiltration is intercepted by a gravel layer before entering a rainwater storage device. This storage device is made of salt-barrier materials, preventing the diffusion of salts from surrounding soil water and groundwater into the collected rainwater, thus avoiding an increase in its salinity. The collected rainwater can be reused, reducing resource waste. However, heavy rainfall can cause soil erosion, as rainwater carries impurities such as leaves, pebbles, and mud. Simply using a gravel layer to intercept these impurities has limitations, easily leading to blockages and poor drainage, indicating room for technological improvement. Utility Model Content

[0004] This invention aims to solve the aforementioned technical problems that the method of simply laying a gravel layer to intercept impurities has limitations and is prone to clogging and poor drainage. It provides a device for purifying, separating, and reusing rainwater in saline-alkali land.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a rainwater purification and salt-retention device for saline-alkali land, including a rainwater collection component and a rainwater purification component;

[0006] The rainwater harvesting assembly includes a collection chamber, which is connected to a main pipe. The main pipe forms a 30° angle with the horizontal line and slopes upward at the end away from the collection chamber. Several collection branch pipes extending to the ground are connected to the main pipe. A vortex funnel is provided near the lower end of the collection chamber, and a sludge collection chamber is connected below the collection chamber.

[0007] The rainwater purification component includes a primary filter chamber and a water collection chamber connected to a collection chamber. The primary filter chamber has an inverted trapezoidal internal cross-section and contains multiple gravel layers, with the gravel particle size gradually decreasing from bottom to top. A water collection conduit connects the lower end of the primary filter chamber to the upper end of the water collection chamber. An installation column is rotatably mounted inside the water collection chamber, and several packing plates are inserted on the outside of the installation column, with activated carbon packing filling the packing plates. An outlet pipe extending out of the ground is connected near the lower end of the water collection chamber.

[0008] Furthermore, several rainwater grates are installed on the bottom surface, and the lower end of each rainwater grate is connected to one of the collection branch pipes.

[0009] Furthermore, a primary filtration conduit is provided on the collection chamber near the upper end, and the other end of the primary filtration conduit extends into the primary filtration chamber near the upper end; a pump is connected to the primary filtration conduit.

[0010] Furthermore, a mesh plate is provided at the upper end of the primary filter chamber, and the mesh plate is made of metal.

[0011] Furthermore, the outer side of the mounting column is provided with several slots that extend through the top, and one side of the filler plate is provided with inserts that can be inserted into the slots. The cross-section of the inserts and slots is dovetail-shaped.

[0012] Furthermore, a drive motor is provided at the upper end of the water collection tank, and the output shaft of the drive motor is connected to the mounting column.

[0013] Furthermore, the sludge collection bin is connected to a sludge pipe extending out of the ground.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] Rainwater is collected through rain grates, multiple collection branch pipes, and the main pipe, preventing rainwater from staying on the ground for a long time, preventing rainwater from coming into contact with groundwater, and preventing a large increase in the salt content of rainwater.

[0016] When entering the collection chamber, the main pipe has an inclined angle, which forms a swirling flow. Heavier impurities such as stones will be swept downwards and swirled into the collection chamber, achieving the pre-separation of heavier and larger impurities and improving the subsequent purification effect.

[0017] Rainwater purification components can purify rainwater in multiple stages. When there is a lot of rain, it can be continuously discharged to the ground-level collection pool for subsequent use in irrigation and other operations, thereby improving the utilization rate of rainwater. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic cross-sectional view of the collection chamber of this utility model.

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the primary filter chamber of this utility model.

[0021] Figure 4 This is a schematic diagram of the internal structure of the water collection tank of this utility model.

[0022] As shown in the figure: 1. Collection chamber, 2. Main pipe, 3. Collection branch pipe, 4. Rain grate, 5. Swirl funnel, 6. Sludge collection chamber, 7. Primary filter chamber, 8. Primary filter conduit, 9. Pump, 10. Gravel layer, 11. Mesh plate, 12. Water collection chamber, 13. Water collection conduit, 14. Mounting column, 15. Packing plate, 16. Slot, 17. Insert, 18. Sludge pipe, 19. Outlet pipe. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] Example 1, in conjunction with Appendix Figure 1 The rainwater purification and salt-retention device for saline-alkali land includes a rainwater collection component and a rainwater purification component. The rainwater collection component can prevent rainwater from staying on the ground for a long time, which would cause it to seep into the ground and raise the groundwater level. The rainwater purification component allows the collected rainwater to be stored after removing impurities and then used for irrigation and other purposes, thereby improving the reuse rate.

[0025] Specifically, the rainwater harvesting assembly includes a collection chamber 1, which is connected to a main pipe 2. Several collection branch pipes 3 extending to the ground are connected to the main pipe 2. Several rainwater grates 4 are installed on the bottom surface, and the lower end of each rainwater grate 4 is connected to one of the collection branch pipes 3. Rainwater is collected through the rainwater grates 4 and the collection branch pipes 3. The rainwater grate 4 itself is in the shape of a grid, which can prevent debris on the ground from clogging the collection branch pipes 3.

[0026] Combined with appendix Figure 1 , 2 The main pipe 2 forms a 30° angle with the horizontal line, and the end away from the collection chamber 1 is inclined upward. A vortex funnel 5 is provided near the lower end of the collection chamber 1. A sludge collection chamber 6 is connected to the bottom of the collection chamber 1. The sludge collection chamber 6 is connected to a sludge guide pipe 18 extending out of the ground. Thus, when rainwater flows down the inclined main pipe 2, it accelerates due to its gravitational potential energy. After entering the collection chamber 1, it forms a vortex in the vortex funnel 5. Heavier impurities such as stones will gradually vortex downward until they enter the sludge collection chamber 6, while the remaining relatively clean water vortexes upward to reach the primary filter pipe 8.

[0027] Combined with appendix Figure 1 , 34. The rainwater purification component includes a primary filter chamber 7 and a water collection chamber 12 connected to the collection chamber 1. Specifically, a primary filter conduit 8 is provided on the collection chamber 1 near the upper end, and the other end of the primary filter conduit 8 extends into the primary filter chamber 7 near the upper end. A pump 9 is connected to the primary filter conduit 8 to guide the rainwater.

[0028] The upper part of the primary filter chamber 7 is equipped with a mesh plate 11, which is made of metal. The mesh plate 11 performs primary filtration and is used to intercept large particles of impurities that fail to enter the sludge collection chamber 6.

[0029] Based on the above structure, the internal longitudinal section of the primary filter chamber 7 is an inverted trapezoid, and multiple gravel layers 10 are provided inside. The particle size of the gravel layers 10 gradually decreases from bottom to top, which can intercept impurities from large to small in sequence. Moreover, the multiple gravel layers 10 form a certain thickness, unlike the screen plate which is flat and easily clogged. A water collection conduit 13 is provided between the lower end of the primary filter chamber 7 and the upper end of the water collection chamber 12. An outlet pipe 19 extending out of the ground is provided near the lower end of the water collection chamber 12. Both the water collection conduit 13 and the outlet pipe 19 are connected to pumps.

[0030] Combined with appendix Figure 1 , 4 The water collection tank 12 is rotatably equipped with a mounting column 14, and a drive motor is provided at the upper end of the water collection tank 12. The output shaft of the drive motor is connected to the mounting column 14, so that the mounting column 14 can rotate smoothly.

[0031] Several packing plates 15 are inserted on the outside of the mounting column 14. The packing plates 15 are filled with activated carbon packing. Specifically, the outside of the mounting column 14 is provided with several slots 16 that extend through the top. Each side of the packing plate 15 is provided with a strip 17 that can be inserted into the slot 16. The cross-section of the strip 17 and the slot 16 is dovetail-shaped, which allows the packing plate 15 to be disassembled and replaced when the activated carbon packing is saturated. Based on this structure, the water collection tank 12 is composed of a tank body and a cover body, which are connected by a flange to avoid affecting the disassembly of the packing plate 15.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A rainwater purification and salt-retention recycling device for saline-alkali land, characterized in that: Includes rainwater harvesting components and rainwater purification components; The rainwater harvesting assembly includes a collection chamber (1), which is connected to a main pipe (2). The main pipe (2) forms a 30° angle with the horizontal line and is inclined upward at the end away from the collection chamber (1). Several collection branch pipes (3) extending to the ground are connected to the main pipe (2). A vortex funnel (5) is provided near the lower end of the collection chamber (1), and a sludge collection chamber (6) is connected below the collection chamber (1). The rainwater purification component includes a primary filter chamber (7) and a water collection chamber (12) connected to the collection chamber (1); the internal longitudinal section of the primary filter chamber (7) is an inverted trapezoid, and multiple gravel layers (10) are provided inside, with the particle size of the gravel layers (10) gradually decreasing from bottom to top; a water collection conduit (13) is provided between the lower end of the primary filter chamber (7) and the upper end of the water collection chamber (12); an installation column (14) is rotatably provided inside the water collection chamber (12), and several packing plates (15) are inserted on the outside of the installation column (14), and the packing plates (15) are filled with activated carbon packing; an outlet pipe (19) extending out of the ground is connected near the lower end of the water collection chamber (12).

2. The saline-alkali land rainwater purification and salt-retention recycling device according to claim 1, characterized in that: Several rainwater grates (4) are installed on the bottom surface, and the lower end of each rainwater grate (4) is connected to one of the collection branch pipes (3).

3. The saline-alkali land rainwater purification and salt-retention recycling device according to claim 1, characterized in that: The collection chamber (1) is provided with a primary filtration conduit (8) near the upper end, and the other end of the primary filtration conduit (8) extends into the primary filtration chamber (7) near the upper end; a pump (9) is connected to the primary filtration conduit (8).

4. The saline-alkali land rainwater purification and salt-retention recycling device according to claim 1, characterized in that: The upper end of the primary filter chamber (7) is provided with a mesh plate (11), which is made of metal.

5. The saline-alkali land rainwater purification and salt-retention recycling device according to claim 1, characterized in that: The mounting post (14) has several slots (16) with through upper ends on the outside. The packing plate (15) has inserts (17) on one side that can be inserted into the slots (16). The cross-sections of the inserts (17) and the slots (16) are both dovetail-shaped.

6. The saline-alkali land rainwater purification and salt-retention recycling device according to claim 1, characterized in that: The upper end of the water collection tank (12) is equipped with a drive motor, and the output shaft of the drive motor is connected to the mounting column (14).

7. The saline-alkali land rainwater purification and salt-retention recycling device according to claim 1, characterized in that: The sludge collection bin (6) is connected to a sludge pipe (18) extending out of the ground.

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