Salt-containing waste liquid solid-liquid separator

Abstract

The utility model belongs to wastewater treatment equipment technical field especially relates to a salt-containing waste liquid solid-liquid separator, include: frame, horizontal formula filter assembly is set up on the frame, and horizontal formula filter assembly includes filter cylinder body, and sets up filter core body in filter cylinder body, among them, filter core body is porous filter structure, the one end of filter cylinder body axial is provided with liquid inlet, the other end of axial is provided with filtrate outlet, and the bottom is provided with solid phase discharge port, and reverse flushing mechanism, reverse flushing mechanism sets up on the frame and is used for relieving filter core body block, and reverse flushing mechanism communicates with filter cylinder body, is used for the reverse delivery washing medium to the filter direction of filter core body, this structure realizes efficient solid-liquid separation through horizontal filtration, and effectively solves the problem that impurity is easy to block filter core body in the filtration process using reverse flushing mechanism, guarantees the continuous stable progress of filtration process.

Description

Technical Field

[0001] This utility model belongs to the technical field of wastewater treatment equipment, and in particular relates to a solid-liquid separator for saline waste liquid. Background Technology

[0002] In the production process of chemical enterprises, wastewater containing salt is inevitably generated. If this wastewater is discharged directly without treatment, it will cause serious pollution to the aquatic environment. For example, the mineralization of rivers and lakes will increase, disrupting the local ecological balance. To reduce this pollution and mitigate its environmental impact, effective treatment of saline wastewater is necessary. Currently, common treatment methods mainly include crystallization and centrifugal solid-liquid separation.

[0003] Before treating saline wastewater, a pretreatment step is usually required. This step aims to separate soluble suspended solids and dissolved salts from the wastewater. This ensures that impurities in the wastewater do not clog filtration equipment during subsequent desalination processes (such as reverse osmosis), thereby improving the overall efficiency of the treatment system. Simultaneously, separating these impurities also improves the quality of the final treated water, preventing poor treatment results due to contamination.

[0004] In actual treatment, due to the wide variety of impurities in saline wastewater, including but not limited to suspended particles, organic matter, and heavy metal ions, the presence of these impurities often causes clogging of filtration equipment, affecting the normal operation of the filtration process and reducing treatment efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a solid-liquid separator for saline wastewater, which aims to solve the technical problem in the pretreatment of saline wastewater in the prior art, where the filtration equipment is easily clogged due to the presence of various impurities such as suspended particles, organic matter, and heavy metal ions in the wastewater, thereby affecting the normal operation of the filtration process and reducing the treatment efficiency.

[0006] To achieve the above objectives, this utility model provides a solid-liquid separator for saline wastewater, comprising: frame; A horizontal filter assembly is mounted on the frame. The horizontal filter assembly includes a filter cylinder and a filter core disposed within the filter cylinder. The filter core has a porous filtration structure. One axial end of the filter cylinder is provided with a liquid inlet, the other axial end is provided with a filtrate outlet, and the bottom is provided with a solid phase outlet. as well as A backwashing mechanism is provided on the frame and is used to alleviate the clogging of the filter element. The backwashing mechanism is connected to the filter cylinder and is used to deliver the backwashing medium in the reverse direction of the filtration of the filter element.

[0007] Optionally, the backwashing mechanism includes: A backwash reservoir is located at the bottom of the filter cylinder. A backwash inlet pipe is provided, one end of which is connected to the backwash storage tank, and the other end of which is connected to the filter cylinder. A backwash spray pipe is installed inside the filter cylinder and connected to the backwash inlet pipe; A high-pressure nozzle is connected to the backwash spray pipe, and the spray direction is towards the filter surface of the filter element, wherein the spray end of the high-pressure nozzle is located at the end of the filter surface in the liquid outlet direction; and A backwash pump is connected to the backwash inlet pipe.

[0008] Optionally, the backwash spray pipe has an annular structure, the high-pressure nozzles are evenly arranged around the circumference of the backwash spray pipe, and the spray angle of the high-pressure nozzles is adjustable.

[0009] Optionally, the backwash inlet pipe is equipped with a pressure regulating valve for adjusting the backwash medium delivery pressure.

[0010] Optionally, a slag discharge assembly is provided at the solid phase discharge outlet. The slag discharge assembly includes a slag discharge valve and a spiral feeding pipe. The spiral feeding pipe is located at the bottom of the filter cylinder and communicates with the solid phase discharge outlet. The slag discharge valve is used to push the filtered solid phase impurities to the spiral feeding pipe.

[0011] Optionally, it also includes an observation window, which is disposed at the top of the filter cylinder and is made of a transparent pressure-resistant material and is used to monitor the slag discharge status inside the filter cylinder.

[0012] Optionally, the opening direction of the observation window is opposite to the opening direction of the solid phase discharge port.

[0013] Optionally, the filter core includes multiple layers of stacked filter screens, at least two of which have different pore sizes, and all of the filter screens have pore sizes that gradually decrease along the direction of waste liquid flow.

[0014] Optionally, a feed regulating component is provided at the liquid inlet. The feed regulating component includes a feed valve and a flow regulating element. The feed valve is located on the feed pipe of the liquid inlet, and the flow regulating element is an adjusting baffle that can move radially along the feed pipe. The adjusting baffle is in sliding sealing cooperation with the inner wall of the feed pipe.

[0015] Optionally, the inner wall of the filter cylinder is provided with two flow guiding protrusions, both of which extend along the length of the filter cylinder and are used to guide the backwashing medium to the solid phase outlet.

[0016] The above-mentioned technical solutions in the solid-liquid separator for saline waste liquid provided in this embodiment of the utility model have at least one of the following technical effects: This utility model relates to a solid-liquid separator for saline waste liquid. By setting up a horizontal filtration assembly, the saline waste liquid enters from the inlet at one end of the filter cylinder along the axial direction and flows through the porous filter core inside. The porous structure of the filter core is used to intercept impurities such as suspended particles, organic matter, and heavy metal ions in the waste liquid, thereby achieving solid-liquid separation. The separated filtrate is discharged from the filtrate outlet at the other end of the filter cylinder along the axial direction, while the intercepted solid impurities are deposited at the bottom of the filter cylinder and discharged through the solid phase outlet. Meanwhile, by setting up a reverse flushing mechanism connected to the filter cylinder, when the filter core becomes clogged due to the trapping of impurities, the reverse flushing mechanism can deliver flushing medium in the reverse direction of the filter core to perform reverse flushing of the filter core, flushing off the impurities attached to the pores and surface of the filter core, thus alleviating the clogging of the filter core. This structure achieves efficient solid-liquid separation through horizontal filtration, while effectively solving the problem of impurities clogging the filter core during the filtration process by utilizing a reverse flushing mechanism. This ensures the continuous and stable operation of the filtration process, improves the treatment efficiency of saline wastewater pretreatment, and enhances the continuous operation capability of the equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of a solid-liquid separator for salt-containing waste liquid provided in an embodiment of this utility model.

[0019] Figure 2 The right view of the solid-liquid separator for salt-containing waste liquid provided in an embodiment of this utility model.

[0020] Figure 3 for Figure 2 The sectional view of AA in the diagram.

[0021] The following are the labeling elements in the figure: 10. Frame; 20. Horizontal filter assembly; 21. Filter cartridge; 22. Filter element; 30. Backwashing mechanism; 31. Backwashing liquid storage tank; 32. Backwash inlet pipe; 41. Slag discharge valve; 42. Screw feed pipe; 50. Observation window; 211. Liquid inlet; 212. Filtrate outlet; 213. Solid phase discharge port. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0026] In one embodiment of this utility model, such as Figures 1-3 As shown, a solid-liquid separator for saline wastewater is provided, comprising: frame; A horizontal filter assembly is mounted on the frame. The horizontal filter assembly includes a filter cylinder and a filter core disposed within the filter cylinder. The filter core has a porous filtration structure. One axial end of the filter cylinder is provided with a liquid inlet, the other axial end is provided with a filtrate outlet, and the bottom is provided with a solid phase outlet. as well as A backwashing mechanism is provided on the frame and is used to alleviate the clogging of the filter element. The backwashing mechanism is connected to the filter cylinder and is used to deliver the backwashing medium in the reverse direction of the filtration of the filter element.

[0027] Specifically, the present invention relates to a solid-liquid separator for saline wastewater. By setting up a horizontal filtration assembly, the saline waste liquid enters from the inlet at one end of the filter cylinder along the axial direction and flows through the porous filter core inside. The porous structure of the filter core is used to intercept impurities such as suspended particles, organic matter, and heavy metal ions in the waste liquid, thereby achieving solid-liquid separation. The separated filtrate is discharged from the filtrate outlet at the other end of the filter cylinder along the axial direction, while the intercepted solid impurities are deposited at the bottom of the filter cylinder and discharged through the solid phase outlet. Meanwhile, by setting up a reverse flushing mechanism connected to the filter cylinder, when the filter core becomes clogged due to the trapping of impurities, the reverse flushing mechanism can deliver flushing medium in the reverse direction of the filter core to perform reverse flushing of the filter core, flushing off the impurities attached to the pores and surface of the filter core, thus alleviating the clogging of the filter core. This structure achieves efficient solid-liquid separation through horizontal filtration, while effectively solving the problem of impurities clogging the filter core during the filtration process by utilizing a reverse flushing mechanism. This ensures the continuous and stable operation of the filtration process, improves the treatment efficiency of saline wastewater pretreatment, and enhances the continuous operation capability of the equipment.

[0028] In another embodiment of this utility model, such as Figures 1-3 As shown, the backwashing mechanism includes: A backwash reservoir is located at the bottom of the filter cylinder. A backwash inlet pipe is provided, one end of which is connected to the backwash storage tank, and the other end of which is connected to the filter cylinder. A backwash spray pipe is installed inside the filter cylinder and connected to the backwash inlet pipe; A high-pressure nozzle is connected to the backwash spray pipe, and the spray direction is towards the filter surface of the filter element, wherein the spray end of the high-pressure nozzle is located at the end of the filter surface in the liquid outlet direction; and A backwash pump is connected to the backwash inlet pipe. Specifically, by setting up a backwash storage tank, a backwash inlet pipe, a backwash spray pipe, a high-pressure nozzle, and a backwash pump, the backwash medium can be transported to the backwash spray pipe through the backwash inlet pipe under the drive of the backwash pump, and then sprayed out at high pressure towards the filter surface of the filter element through the high-pressure nozzle. Since the spray end of the high-pressure nozzle is located at the liquid outlet end of the filter surface, it can accurately backwash the filter surface from the filtrate outlet side of the filter element. The high-pressure water flow can powerfully impact the clogging impurities inside and on the surface of the filter element pores, significantly improving the impact force and cleaning effect of backwashing, further ensuring the unobstructed flow of the filter element, extending the filtration cycle, reducing downtime maintenance time caused by clogging, thereby improving the overall operating efficiency and stability of the equipment.

[0029] In another embodiment of this utility model, such as Figures 1-3 As shown, the backwash spray pipe has a ring structure, and the high-pressure nozzles are evenly arranged around the circumference of the backwash spray pipe, with adjustable spray angles. Specifically, by setting the backwash spray pipe to a ring structure and evenly arranging the high-pressure nozzles around the circumference, the outer circumferential filter surface of the cylindrical filter element can be uniformly rinsed 360 degrees without dead angles, avoiding rinsing blind spots and ensuring that all parts of the filter element are effectively cleaned. Simultaneously, the adjustable spray angle design allows for flexible adjustment of the high-pressure nozzle's spray direction based on the clogging status and impurity attachment location of the filter element, specifically enhancing the rinsing effect, further optimizing backwashing efficiency, and ensuring that the filter element regains good filtration performance.

[0030] In another embodiment of this utility model, such as Figures 1-3 As shown, a pressure regulating valve is installed on the backwash inlet pipe to adjust the backwash medium delivery pressure. Specifically, by installing a pressure regulating valve on the backwash inlet pipe, the delivery pressure of the backwash medium can be precisely adjusted according to the degree of clogging of the filter element, its material characteristics, and the type of backwash medium.

[0031] In another embodiment of this utility model, such as Figures 1-3As shown, a slag discharge assembly is provided at the solid phase discharge outlet. The slag discharge assembly includes a slag discharge valve and a spiral feeding pipe. The spiral feeding pipe is located at the bottom of the filter cylinder and communicates with the solid phase discharge outlet. The slag discharge valve is used to push the filtered solid phase impurities to the spiral feeding pipe. Specifically, the slag discharge assembly at the solid phase discharge outlet controls the timing of solid phase impurity discharge through the slag discharge valve and uses the spiral feeding pipe to stably and continuously transport the trapped solid phase impurities out of the filter cylinder. The spiral feeding method has the advantages of stable conveying, resistance to clogging, and good sealing, effectively preventing leakage of saline wastewater during slag discharge, while ensuring timely discharge of solid phase impurities, avoiding impurities accumulating at the bottom of the filter cylinder and affecting filtration efficiency or even clogging the discharge outlet.

[0032] In another embodiment of this utility model, such as Figures 1-3 As shown, it also includes an observation window, which is located on the top of the filter cylinder. The observation window is made of transparent and pressure-resistant material and is used to monitor the slag discharge status inside the filter cylinder. Specifically, the observation window made of transparent and pressure-resistant material on the top of the filter cylinder allows operators to intuitively and in real time observe the deposition and accumulation of solid impurities inside the filter cylinder, as well as the working status of the slag discharge components.

[0033] In another embodiment of this utility model, such as Figures 1-3 As shown, the opening direction of the observation window is directly opposite the opening direction of the solid phase discharge port. Specifically, the opening direction of the observation window is directly opposite the opening direction of the solid phase discharge port, which further optimizes the observation angle, allowing operators to focus more clearly and accurately on the slag discharge situation in the solid phase discharge port area.

[0034] In another embodiment of this utility model, such as Figures 1-3 As shown, the filter core comprises multiple layers of stacked filter screens, with at least two layers having different pore sizes, and all filter screens gradually decreasing in pore size along the wastewater flow direction. Specifically, the filter core employs a multi-layered stacked filter screen structure with gradually decreasing pore size along the wastewater flow direction, forming a gradient filtration system. When saline wastewater flows sequentially through filter screens of different pore sizes, larger particles are first trapped by the outer filter screen with larger pore sizes, while smaller particles are trapped by the subsequent inner filter screen with even smaller pore sizes.

[0035] In another embodiment of this utility model, such as Figures 1-3As shown, a feed regulating assembly is provided at the liquid inlet. The feed regulating assembly includes a feed valve and a flow regulating component. The feed valve is located on the feed pipe of the liquid inlet, and the flow regulating component is a regulating baffle that can move radially along the feed pipe. The regulating baffle is in sliding sealing cooperation with the inner wall of the feed pipe. Specifically, the feed regulating assembly at the liquid inlet can quickly cut off or connect the liquid inlet through the feed valve, while the flow regulating component (the radially movable regulating baffle) can adjust the effective flow cross-sectional area of ​​the feed pipe by changing its position in the feed pipe, thereby precisely controlling the flow rate of the saline waste liquid entering the filter cylinder.

[0036] In another embodiment of this utility model, such as Figures 1-3 As shown, the inner wall of the filter cylinder is provided with two flow-guiding protrusions, both extending along the length of the filter cylinder and used to guide the backwashing medium towards the solid phase discharge port. Specifically, the two flow-guiding protrusions extending along the length of the inner wall of the filter cylinder can guide the impurities and washing medium washed off from the filter element during backwashing, directing them towards the solid phase discharge port. This helps to accelerate the accumulation and discharge of the washed-off impurities at the discharge port.

[0037] The rest of this embodiment is the same as that in Embodiment 1. Features not explained in this embodiment are explained using the methods in Embodiment 1, and will not be repeated here.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A solid-liquid separator for saline wastewater, characterized in that, include: frame; A horizontal filter assembly is mounted on the frame. The horizontal filter assembly includes a filter cylinder and a filter core disposed within the filter cylinder. The filter core has a porous filtration structure. One axial end of the filter cylinder is provided with a liquid inlet, the other axial end is provided with a filtrate outlet, and the bottom is provided with a solid phase outlet. as well as A backwashing mechanism is provided on the frame and is used to alleviate the clogging of the filter element. The backwashing mechanism is connected to the filter cylinder and is used to deliver the backwashing medium in the reverse direction of the filtration of the filter element.

2. The solid-liquid separator for saline wastewater according to claim 1, characterized in that, The backwashing mechanism includes: A backwash reservoir is located at the bottom of the filter cylinder. A backwash inlet pipe is provided, one end of which is connected to the backwash storage tank, and the other end of which is connected to the filter cylinder. A backwash spray pipe is installed inside the filter cylinder and connected to the backwash inlet pipe; A high-pressure nozzle is connected to the backwash spray pipe, and the spray direction is towards the filter surface of the filter element, wherein the spray end of the high-pressure nozzle is located at the end of the filter surface in the liquid outlet direction; and A backwash pump is connected to the backwash inlet pipe.

3. The solid-liquid separator for saline wastewater according to claim 2, characterized in that, The backwash spray pipe has a ring structure, and the high-pressure nozzles are evenly arranged around the circumference of the backwash spray pipe, and the spray angle of the high-pressure nozzles is adjustable.

4. The solid-liquid separator for saline wastewater according to claim 3, characterized in that, The backwash inlet pipe is equipped with a pressure regulating valve for adjusting the backwash medium delivery pressure.

5. The solid-liquid separator for saline wastewater according to claim 4, characterized in that, A slag discharge assembly is provided at the solid phase discharge outlet. The slag discharge assembly includes a slag discharge valve and a spiral feeding pipe. The spiral feeding pipe is located at the bottom of the filter cylinder and is connected to the solid phase discharge outlet. The slag discharge valve is used to push the filtered solid phase impurities to the spiral feeding pipe.

6. The solid-liquid separator for saline wastewater according to claim 5, characterized in that, It also includes an observation window, which is located at the top of the filter cylinder and is made of transparent pressure-resistant material and is used to monitor the slag discharge status inside the filter cylinder.

7. The solid-liquid separator for saline wastewater according to claim 6, characterized in that, The opening direction of the observation window is directly opposite the opening direction of the solid phase discharge port.

8. The solid-liquid separator for saline wastewater according to any one of claims 1 to 7, characterized in that, The filter core comprises multiple layers of stacked filter screens, at least two of which have different pore sizes, and the pore sizes of all the filter screens gradually decrease along the direction of waste liquid flow.

9. The solid-liquid separator for saline wastewater according to any one of claims 1 to 7, characterized in that, A feed regulating component is provided at the liquid inlet. The feed regulating component includes a feed valve and a flow regulating element. The feed valve is located on the feed pipe of the liquid inlet. The flow regulating element is an adjusting baffle that can move radially along the feed pipe. The adjusting baffle is in sliding sealing cooperation with the inner wall of the feed pipe.

10. The solid-liquid separator for saline wastewater according to any one of claims 1 to 7, characterized in that, The inner wall of the filter cylinder is provided with two flow guiding protrusions, both of which extend along the length of the filter cylinder and are used to guide the backwashing medium to the solid phase discharge port.

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