Mountain land water supply device based on ceramic membrane

Abstract

A mountain land water supply device based on a ceramic membrane belongs to the technical field of water purification equipment. The problems that pollution of a ceramic membrane is increased due to a large number of flocs in an existing sedimentation tank, the backwashing frequency is increased, and the water production efficiency is reduced are solved. The device comprises a coagulation unit, a precipitation membrane filtration unit and a water production unit which are sequentially arranged and communicated, the precipitation membrane filtration unit comprises a membrane filtration water tank, a flocculation module and a filtration module, the flocculation module and the filtration module are sequentially arranged in the membrane filtration water tank from top to bottom, and a to-be-purified water source mixed with a coagulant is introduced into the precipitation membrane filtration unit through the coagulation unit and then flows into the precipitation membrane filtration unit through the filtration module. The coagulant flows upwards from the lower part of the precipitation membrane filtration unit, the size of floc coagulated by the coagulant and impurities in the water source to be purified is increased after the floc flows through the flocculation module, so that the pollution of the floc to the filtration module is reduced, and filtered water flowing out of the membrane filtration water tank is introduced into the water production unit. The device is mainly used for filtering water sources such as rivers, lakes, underground water and rainwater so as to obtain purified water which can be used by users.

Description

Technical Field

[0001] This application belongs to the field of water purification equipment technology, and in particular relates to a mountain water supply device based on a ceramic membrane. Background Technology

[0002] my country's mountainous regions cover an area of ​​6.636 million square kilometers. Their water sources mainly include rivers, lakes, groundwater, and rainwater. Influenced by topography, climate, geology, and other factors, their distribution is uneven and highly variable, leading to difficulties in laying and installing water supply pipelines. Mountainous cities are generally built according to the terrain, with dispersed populations, resulting in dispersed water demand and increasing the complexity and operating costs of the water supply system. Traditional centralized water supply systems are often difficult to implement effectively in these areas because long-distance, high-altitude water pipelines are not only costly to construct but also difficult to operate and maintain. Distributed water supply equipment, on the other hand, can adapt to this complex terrain, flexibly deploying water supply points to achieve nearby water intake and supply, reducing the difficulty and cost of water supply.

[0003] Distributed water supply systems demand smaller-scale engineering and modularized treatment processes from water purification equipment. However, solely pursuing miniaturization at the expense of increased water production capacity fails to meet the water needs of people in mountainous areas. Therefore, it is necessary to equip water purification equipment with sufficient production capacity within a limited design area, requiring efficient coupling between units. Membrane modules, with their high assembly density and suitability for modular design, are commonly used modular water purification devices. Among membrane modules, ceramic membranes, in particular, have strong application prospects in water purification equipment due to their excellent stability and hydrophilicity. Gravity-driven ceramic membranes, by directly immersing the ceramic membrane module in a sedimentation tank, save on the footprint of the membrane module and complex piping design. Filtration is achieved through static pressure difference, offering advantages such as small footprint and energy saving. However, the large amount of flocs in the sedimentation tank increases ceramic membrane fouling, raises backwashing frequency, and reduces water production efficiency. Summary of the Invention

[0004] In view of this, this application provides a mountain water supply device based on a ceramic membrane, which can increase the size of the flocs to reduce the contamination of the filter module by the flocs.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows:

[0006] A ceramic membrane-based mountain water supply device includes a coagulation unit, a sedimentation membrane filter unit, and a product water unit arranged and connected in sequence. The sedimentation membrane filter unit includes a membrane filter tank, a flocculation module, and a filtration module. The flocculation module and the filtration module are arranged in the membrane filter tank from top to bottom. The water source to be purified, mixed with coagulant, is introduced into the sedimentation membrane filter unit through the coagulation unit and flows upward from the bottom of the sedimentation membrane filter unit. The flocs coagulated by the coagulant and impurities in the water source to be purified increase in size after flowing through the flocculation module, so as to reduce the contamination of the filtration module by the flocs. The filtered water flowing out of the membrane filter tank is introduced into the product water unit.

[0007] Furthermore, the flocculation module is mainly composed of several horizontally arranged inclined plates.

[0008] Furthermore, the inclination angle of the inclined plate is 50°~70°.

[0009] Furthermore, the filter module is a plate-type ceramic membrane.

[0010] Furthermore, the plate-type ceramic membrane is arranged vertically.

[0011] Furthermore, the coagulation unit includes a coagulation tank, a stirring motor, a stirring shaft, stirring blades, and a transverse partition plate. The coagulation tank has an inlet at the top and an outlet at the bottom. The stirring motor is fixed to the top of the coagulation tank and can drive the stirring blades to rotate through the stirring shaft. There are multiple sets of stirring blades, which are spaced apart along the vertical direction of the coagulation tank. There are multiple transverse partition plates, which are arranged between two adjacent sets of stirring blades. One end of the transverse partition plate is connected to the inner wall of the coagulation tank, and the other end extends laterally towards the stirring shaft.

[0012] Furthermore, the transverse partitions are alternately arranged between two adjacent sets of stirring blades.

[0013] Furthermore, one or two transverse partition plates are provided between two adjacent sets of stirring blades.

[0014] Furthermore, the sedimentation membrane filter unit also includes a sludge discharge support and a sludge discharge pipe. The sludge discharge support is located at the bottom of the filter module, and one end of the sludge discharge pipe is connected to the sludge discharge support, while the other end extends out of the membrane filter tank for sludge discharge.

[0015] Furthermore, the water production unit includes a water production tank and a suction pump. The suction pump is installed on the pipeline between the membrane filter tank and the water production tank, and the water production tank is equipped with an outlet.

[0016] The beneficial effects of this application compared to the prior art are:

[0017] This application discloses a ceramic membrane-based mountain water supply device that is submerged in a sedimentation tank and operates under gravity, achieving low-power operation. Furthermore, the device integrates three functional units: a coagulation unit enhances coagulation through the coupling of agitator blades and transverse partitions, increasing impurity removal rate; and a sedimentation membrane filtration unit, through a flocculation module composed of inclined plates, increases the growth rate and intensity of flocs in the sedimentation tank, reducing floc contamination of the ceramic membrane surface, increasing the water production per unit time of the plate ceramic membrane, improving water quality stability, reducing backwashing frequency, and further lowering energy consumption. Simultaneously, the efficient coupling of the flocculation module and the plate ceramic membrane reduces the device's footprint, meeting the needs of mountainous areas for distributed water supply equipment with short process flows and small footprint. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are provided to further illustrate this application.

[0019] Figure 1 This is a schematic diagram of a mountain water supply device based on a ceramic membrane according to the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Coagulation unit, 11. Coagulation water tank, 12. Stirring motor, 13. Stirring shaft, 14. Stirring blades, 15. Horizontal partition plate;

[0022] 2. Sedimentation membrane filter unit, 21. Membrane filter water tank, 22. Sludge discharge support, 23. Sludge discharge pipe, 24. Plate ceramic membrane, 25. Inclined plate;

[0023] Water production unit 3, water production tank 31, suction pump 32. Detailed Implementation

[0024] The invention described in this application will be explained in detail below with reference to the accompanying drawings and specific embodiments.

[0025] See Figure 1 This embodiment of a ceramic membrane-based mountain water supply device is mainly used to filter water sources such as rivers, lakes, groundwater, and rainwater to obtain purified water that users can use. Combined with... Figure 1 The system comprises a coagulation unit 1, a sedimentation membrane filter unit 2, and a product water unit 3, arranged sequentially and connected to each other, all submerged in a sedimentation tank. The coagulation unit 1 is used to thoroughly mix the water source to be purified with the coagulant, allowing the coagulant to draw out impurities (such as suspended solids, bacteria, heavy metals, odor substances, new pollutants, and other impurities) from the water source and coagulate them into small flocs. The sedimentation membrane filter unit 2 is used to filter out the coagulated flocs from the water source, thereby obtaining purified water. The product water unit 3 is used to store the purified water for supply to users.

[0026] See Figure 1 The coagulation unit 1 in this embodiment includes a coagulation tank 11, a stirring motor 12, a stirring shaft 13, stirring blades 14, and a transverse partition plate 15. The coagulation tank 11 has an inlet at the top and an outlet at the bottom. The stirring motor 12 is fixedly mounted on the top of the coagulation tank 11. The stirring shaft 13 is vertically arranged inside the coagulation tank 11 and connected to the motor shaft of the stirring motor 12. Multiple sets of stirring blades 14 are arranged at intervals along the axis of the stirring shaft 13. The stirring motor 12 can drive the stirring blades 14 to rotate through the stirring shaft 13, so that the stirring blades 14 can fully stir the coagulant and the water source to be purified, allowing the coagulant to absorb more impurities from the water source, thereby achieving the purification purpose. Each set has two stirring blades 14, which are symmetrically arranged on the left and right sides of the stirring shaft 13. The transverse partition plate 15 is provided with multiple pieces and arranged between two adjacent sets of stirring blades 14. One end of the transverse partition plate 15 is connected to the inner wall of the coagulation tank 11, and the other end extends laterally towards the stirring shaft 13. A certain gap is left between the transverse partition plate 15 and the stirring shaft 13 to avoid interference.

[0027] When the coagulant and water enter the coagulation tank 11 through the inlet at the top, the stirring motor 12 drives multiple sets of stirring blades 14 to rotate via the stirring shaft 13, thereby achieving thorough mixing of the coagulant and impurities in the water, allowing the coagulant to draw out more impurities from the water. However, as the number of flocs increases, they tend to settle and accumulate in the dead corners at the bottom of the coagulation tank 11. Even with the turbulence from the stirring blades 14, the flocs in these dead corners are not easily carried out of the outlet of the coagulation tank 11 by the water flow. Therefore, in this embodiment, the coagulation tank 11 is divided into several enhanced coagulation zones by a transverse partition plate 15. The enhanced coagulation zones, in conjunction with the stirring action of the stirring blades 14, can generate stronger turbulence, improving the coagulation efficiency of the coagulant and impurities. At the same time, the multiple zones prevent flocs from accumulating in the dead corners at the bottom of the coagulation tank 11, allowing as many flocs as possible to flow into the sedimentation membrane filter unit 2 with the water flow, achieving a better purification effect.

[0028] Among them, combined Figure 1 In this embodiment, the transverse partition plates 15 are alternately arranged between two adjacent sets of stirring blades 14. Since the water flows from top to bottom, if the transverse partition plates 15 are set on the same side, the water and coagulant may flow directly downward from the other side of the stirring blades 14, and the transverse partition plates 15 may not play a role in enhancing coagulation. However, by arranging them alternately on the left and right, the water flow can form a curved flow path, lengthening the water flow path and flow time, thereby allowing the coagulant and impurities in the water flow to coagulate more fully and improving the coagulation effect.

[0029] In addition, one or two transverse partition plates 15 are provided between two adjacent sets of stirring blades 14. The number of transverse partition plates 15 is related to the distance between two adjacent sets of stirring blades 14. If the distance is small, one transverse partition plate 15 can be provided, and if the distance is large, two transverse partition plates 15 can be provided.

[0030] See Figure 1 In this embodiment, the sedimentation membrane filter unit 2 includes a membrane filter tank 21, a sludge discharge pipe 23, and a flocculation module, a filtration module, and a sludge discharge support 22 arranged sequentially from top to bottom within the membrane filter tank 21. One end of the sludge discharge pipe 23 is connected to the sludge discharge support 22, and the other end extends out of the membrane filter tank 21 for sludge discharge. Figure 1 As can be seen, the outlet of the coagulation tank 11 is located on the lower side and to the left of the membrane filter tank 21. The filter module and sludge removal support 22 are located near the middle of the membrane filter tank 21, with a gap between them and the inner walls on both sides of the membrane filter tank 21. The flocculation module is located near the right side of the membrane filter tank 21 and is attached to the inner wall on the right side of the membrane filter tank 21. There is a certain space between the flocculation module and the inner wall on the left side of the membrane filter tank 21. The flocculation module, the filter module, and the inner wall on the left side of the membrane filter tank 21 can guide the water source mixed with flocs. That is, when the water mixed with flocs flows out of the outlet of the coagulation tank 11, it flows upward under water pressure. When it rises to the top of the flocculation module, it can pass through the flocculation module and the filter module by gravity. The small-sized flocs increase in size after flowing through the flocculation module to reduce the contamination of the filter module by the flocs. The water source filtered by the filter module flows out of the outlet of the membrane filter tank 21, thus purifying the water source. The flocs filtered out by the filter module form sludge, which is periodically discharged by the sludge discharge bracket 22 and sludge discharge pipe 23 at the bottom of the filter module according to the working conditions.

[0031] In this embodiment, the flocculation module is mainly composed of several horizontally arranged inclined plates 25. The top of the inclined plate 25 on the right side abuts against the right side of the membrane filter tank 21, which ensures that the water source and the flocs in the water source can all pass through the flocculation module and the filter module.

[0032] The inclination angle of the inclined plate 25 is 50°~70°, preferably 60°.

[0033] Small flocs collide as they settle downwards from the top of the flocculation module, forming larger flocs. The upper inclined plate 25 slows down the settling speed of the flocs and the water flow, which on the one hand facilitates further increase in floc size, and the strength of the flocs increases with size; on the other hand, it reduces the impact of hydraulic forces on the flocs, making them less prone to breakage. When the larger flocs enter the filtration module, they have difficulty passing through, reducing floc contamination of the filtration module.

[0034] See Figure 1 In this embodiment, the filter module is a plate-type ceramic membrane 24, which is arranged vertically. The plate-type ceramic membrane 24 has excellent stability and hydrophilicity. The vertical arrangement of the straight guide plates of the plate-type ceramic membrane 24 can accelerate the settling speed of the flocs, and the larger flocs are difficult to pass through the porous surface of the plate-type ceramic membrane 24, thus reducing the contamination of the ceramic membrane surface by the flocs.

[0035] This embodiment reduces the footprint of the water supply device through the efficient coupling of the flocculation module composed of inclined plates 25 and the filtration module composed of plate ceramic membranes 24.

[0036] See Figure 1 In this embodiment, the water production unit 3 includes a water production tank 31 and a suction pump 32. The suction pump 32 is installed on the pipeline between the membrane filter tank 21 and the water production tank 31, and the water production tank 31 has an outlet. The water produced by the plate ceramic membrane 24 can be appropriately suctioned by the suction pump 32 to increase the transmembrane pressure difference, which is beneficial to the densification of the floc layer on the surface of the plate ceramic membrane 24 and improves the retention capacity. At the same time, the suction pump 32 can also be used as a backwash pump to periodically clean the plate ceramic membrane 24 using the water produced.

[0037] This embodiment of a ceramic membrane-based mountain water supply device is submerged in a sedimentation tank and operates under gravity, achieving low-power operation. Furthermore, the mountain water supply device is integrated from three functional units. The coagulation unit 1 enhances the coagulation effect through the coupling of the stirring blades 14 and the transverse partition plates 15, increasing the impurity removal rate. The sedimentation membrane filtration unit 2, through the design of a flocculation module composed of inclined plates 25, improves the growth rate and intensity of floc size in the sedimentation tank, reduces floc contamination of the ceramic membrane surface, increases the water production per unit time of the plate ceramic membrane 24, and enhances water quality stability, reducing backwashing frequency and lowering energy consumption. Simultaneously, the efficient coupling between the flocculation module and the plate ceramic membrane 24 reduces the equipment's footprint, meeting the needs of mountainous areas for distributed water supply equipment with short process flows and small footprint. In other words, this embodiment of the mountain water supply device not only improves the filtration effect of the water source but also has a small overall footprint and low energy consumption, meeting the water supply needs of mountainous areas.

[0038] The following is combined Figure 1 The working principle and workflow of a ceramic membrane-based mountain water supply device of this application are described in detail.

[0039] When the coagulant and water enter the coagulation tank 11 through the inlet at the top, the stirring motor 12 drives multiple sets of stirring blades 14 to rotate via the stirring shaft 13, thereby achieving thorough mixing of the coagulant and impurities in the water, allowing the coagulant to draw out more impurities from the water. The water mixed with flocs flows from the outlet of the coagulation tank 11 to the membrane filter tank 21, flowing upwards under water pressure and rising to the top of the flocculation module. The upper inclined plate 25 slows down the settling speed of the flocs and the speed of the water flow. Small-sized flocs collide and form larger-sized flocs as they settle downwards from the top of the flocculation module, reducing the fouling of the plate ceramic membrane 24 by the flocs. The water filtered by the plate ceramic membrane 24 flows out from the outlet of the membrane filter tank 21, achieving water purification. The flocs filtered out by the plate ceramic membrane 24 form sludge, which is periodically discharged by the sludge discharge support 22 and sludge discharge pipe 23 at the bottom of the plate ceramic membrane 24 according to the working conditions.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions created in this application, and are not intended to limit the scope of protection of this application. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions created in this application without departing from the substance and scope of the technical solutions created in this application.

Claims

1. A mountain water supply device based on a ceramic membrane, characterized in that, The system includes a coagulation unit, a sedimentation membrane filter unit, and a product water unit arranged and connected in sequence. The sedimentation membrane filter unit includes a membrane filter tank, a flocculation module, and a filtration module. The flocculation module and the filtration module are arranged in sequence from top to bottom in the membrane filter tank. The water source to be purified, mixed with coagulant, is introduced into the sedimentation membrane filter unit through the coagulation unit and flows upward from the bottom of the sedimentation membrane filter unit. The flocs formed by the coagulant and impurities in the water source to be purified increase in size after flowing through the flocculation module, so as to reduce the contamination of the filtration module by the flocs. The filtered water flowing out of the membrane filter tank is introduced into the product water unit.

2. The mountain water supply device based on a ceramic membrane according to claim 1, characterized in that, The flocculation module is mainly composed of several horizontally arranged inclined plates.

3. A mountain water supply device based on a ceramic membrane according to claim 2, characterized in that, The inclination angle of the inclined plate is 50°~70°.

4. A mountain water supply device based on a ceramic membrane according to claim 1, characterized in that, The filter module is a plate-type ceramic membrane.

5. A mountain water supply device based on a ceramic membrane according to claim 4, characterized in that, The plate-type ceramic membrane is arranged vertically.

6. A mountain water supply device based on a ceramic membrane according to claim 1, characterized in that, The coagulation unit includes a coagulation tank, a stirring motor, a stirring shaft, stirring blades, and a transverse partition plate. The coagulation tank has an inlet at the top and an outlet at the bottom. The stirring motor is fixed to the top of the coagulation tank and can drive the stirring blades to rotate through the stirring shaft. There are multiple sets of stirring blades, which are arranged at intervals along the vertical direction of the coagulation tank. There are multiple transverse partition plates, which are arranged between two adjacent sets of stirring blades. One end of the transverse partition plate is connected to the inner wall of the coagulation tank, and the other end extends laterally towards the stirring shaft.

7. A mountain water supply device based on a ceramic membrane according to claim 4, characterized in that, The horizontal partition plates are arranged alternately on the left and right sides between two adjacent sets of stirring blades.

8. A mountain water supply device based on a ceramic membrane according to claim 4, characterized in that, One or two transverse partition plates are provided between two adjacent sets of stirring blades.

9. A mountain water supply device based on a ceramic membrane according to claim 1, characterized in that, The sedimentation membrane filter unit also includes a sludge discharge support and a sludge discharge pipe. The sludge discharge support is located at the bottom of the filter module, and one end of the sludge discharge pipe is connected to the sludge discharge support, while the other end extends out of the membrane filter tank for sludge discharge.

10. A mountain water supply device based on a ceramic membrane according to claim 1, characterized in that, The water production unit includes a water production tank and a suction pump. The suction pump is installed on the pipeline between the membrane filter tank and the water production tank, and the water production tank is equipped with an outlet.

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