Solid-liquid separation device
By combining the design of the filter element with the middle inlet and the peripheral outlet, and the siphon-driven water inlet and aeration backwashing components, the problem of incomplete removal of solid impurities in traditional solid-liquid separation devices is solved, achieving a high-efficiency and low-energy solid-liquid separation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HEZHONG ENVIRONMENTAL TECH CO LTD
- Filing Date
- 2025-07-08
- Publication Date
- 2026-06-23
AI Technical Summary
Traditional wastewater treatment devices struggle to effectively remove solid impurities of varying sizes during solid-liquid separation, impacting subsequent water treatment results.
It adopts a filter element design with center inlet and peripheral outlet, combined with siphon non-powered water inlet and aeration backwashing components, to achieve efficient sedimentation and separation of solid pollutants in wastewater, integrating sedimentation, filtration and protein separation functions into one.
It improves the efficiency and effectiveness of solid-liquid separation, reduces energy consumption, and ensures the efficient removal of solid pollutants and the high-quality output of clarified liquid.
Smart Images
Figure CN224388298U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of water treatment technology, and in particular to a solid-liquid separation device. Background Technology
[0002] Aquaculture wastewater typically contains a large amount of solid impurities, such as uneaten feed and feces. These solid impurities hinder the treatment of the wastewater, necessitating solid-liquid separation as a first step. Traditional wastewater treatment systems often employ sedimentation for solid-liquid separation. However, due to the varying sizes of solid impurities, this process can easily reduce the effectiveness of solid-liquid separation, negatively impacting subsequent wastewater treatment. Utility Model Content
[0003] Therefore, it is necessary to provide a solid-liquid separation device that can effectively remove solid pollutants from wastewater.
[0004] A solid-liquid separation device, comprising:
[0005] A housing, wherein an inlet and an outlet are provided on the side wall of the housing, the inlet being located above the outlet; and
[0006] A filter element is disposed inside the housing, and the top and bottom of the filter element are respectively provided with a first opening and a second opening;
[0007] The wastewater to be treated can flow into the housing through the inlet and into the filter element through the first opening. Under the solid-liquid separation action of the filter element, the water separated from the wastewater can flow out of the filter element through the filter holes on the periphery of the filter element and then flow out of the housing through the outlet; and the solid pollutants separated from the wastewater can be discharged from the filter element through the second opening and settle to the bottom of the housing.
[0008] In one embodiment, the filter element is a hollow cubic grid structure, with the first opening at the center of the top wall of the filter element, the second opening at the center of the bottom wall of the filter element, and the filter holes provided on all four opposite sidewalls of the filter element.
[0009] In one embodiment, the solid-liquid separation device further includes a siphon tube disposed on the side wall of the housing. The siphon tube is used to inject water into the housing to change the water level in the housing, thereby triggering a siphon, so that the wastewater to be treated can automatically flow into the housing through the inlet by siphon.
[0010] In one embodiment, the solid-liquid separation device further includes an aeration backwashing assembly disposed within the housing and located near the bottom of the filter element.
[0011] In one embodiment, the aeration backwashing assembly includes an aeration pipe and a plurality of aeration heads, the aeration pipe surrounding the outer periphery of the filter element, and the plurality of aeration heads being spaced apart circumferentially on the aeration pipe.
[0012] In one embodiment, the solid-liquid separation device further includes an exhaust pipe disposed at the top of the housing, the exhaust pipe being used to discharge excess gas output by the aeration backwashing assembly, as well as foam formed during the contact between the organic matter containing protein in the wastewater and the gas output by the aeration backwashing assembly.
[0013] In one embodiment, a partition is provided inside the housing to divide the interior of the housing into a first space and a second space distributed from top to bottom. The filter element is disposed in the second space. The partition is provided with perforations. The exhaust pipe is connected to the first space. Excess gas output by the aeration backwashing assembly and the foam can enter the second space through the perforations and then be discharged to the outside through the exhaust pipe.
[0014] In one embodiment, the partition includes a first inclined plate and a second inclined plate connected to each other. The first inclined plate and the second inclined plate are both obliquely placed inside the housing, and the first inclined plate and the second inclined plate are inclined in opposite directions. The first inclined plate and the second inclined plate form an inverted V-shaped structure, and a plurality of through holes are provided at intervals at the connection between the first inclined plate and the second inclined plate.
[0015] In one embodiment, the solid-liquid separation device further includes an inlet pipe, the outlet of which is connected to the inlet, the inlet of which extends into the aquaculture pond, and the inlet is located above the inlet of the inlet of the inlet pipe. The aquaculture wastewater output from the aquaculture pond can flow into the solid-liquid separation device through the inlet pipe and the inlet in sequence for solid-liquid separation.
[0016] In one embodiment, at least one of the following technical solutions is also included:
[0017] A sludge hopper is formed at the bottom of the shell; and
[0018] The water outlet is provided with a water outlet pipe. The first end of the water outlet pipe extends into the housing and surrounds the filter element. The second end of the water outlet pipe extends out of the housing, and the first end of the water outlet pipe is provided with multiple perforations at intervals.
[0019] The solid-liquid separation device provided in this application allows wastewater (e.g., aquaculture wastewater) to enter the shell through the inlet and flow into the filter element through the first opening. The wastewater undergoes solid-liquid separation through the filter element, and the separated water (i.e., clear liquid) flows out of the filter element through the filter holes on its periphery and then out of the shell through the outlet. Simultaneously, solid pollutants intercepted and separated by the filter element (e.g., uneaten feed, feces, etc. in aquaculture wastewater) are discharged from the filter element through the second opening and settle at the bottom of the shell. Compared to traditional solid-liquid separation equipment, the filter element of this application uses a center-inlet, periphery-outlet water flow pattern, allowing the solid pollutants separated from the wastewater to flow to the bottom of the shell by gravity for sedimentation and concentration. This efficiently removes solid pollutants from the wastewater, resulting in high treatment efficiency and good treatment effect. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the solid-liquid separation device in one embodiment;
[0022] Figure 2 for Figure 1 A cross-sectional view of the solid-liquid separation device shown;
[0023] Figure 3 This is a diagram showing the combination of a solid-liquid separation device and an aquaculture pond in one embodiment.
[0024] Figure 4 for Figure 1 The diagram shows the structure of the solid-liquid separation device after the hidden part of the shell is shown. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0027] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0028] like Figure 1 and Figure 2 As shown, this application provides a solid-liquid separation device 200, which includes a housing 210 and a filter element 220. The housing 210 has an inlet 211 and an outlet 212 on its side wall, with the inlet 211 located above the outlet 212. The filter element 220 is disposed inside the housing 210, and the top and bottom of the filter element 220 are respectively provided with a first opening 221 and a second opening 222.
[0029] The wastewater to be treated can flow into the housing 210 through the inlet 211 and into the filter element 220 through the first opening 221. Under the solid-liquid separation action of the filter element 220, the water separated from the wastewater can flow out of the filter element 220 through the filter holes on the periphery of the filter element 220 and then flow out of the housing 210 through the outlet 212; and the solid pollutants separated from the wastewater can be discharged from the filter element 220 through the second opening 222 and settle to the bottom of the housing 210.
[0030] The solid-liquid separation device 200 provided in this application allows wastewater (e.g., aquaculture wastewater) to enter the housing 210 through the inlet 211 and flow into the filter element 220 through the first opening 221. After solid-liquid separation by the filter element 220, the separated water (i.e., clear liquid) flows out of the filter element 220 through the filter holes on its periphery and then out of the housing 210 through the outlet 212. Simultaneously, solid pollutants (e.g., solid wastewater) intercepted and separated by the filter element 220 are also separated from the wastewater. Solid pollutants such as uneaten feed and feces in aquaculture wastewater are discharged from the filter element 220 through the second opening 222 and settle to the bottom of the shell 210. Compared with traditional solid-liquid separation equipment, the filter element 220 of the solid-liquid separation device 200 of this application adopts a water flow pattern of center inlet and periphery outlet, so that the solid pollutants separated in the wastewater can flow to the bottom of the shell 210 by gravity for sedimentation and concentration, thereby efficiently removing solid pollutants in wastewater and having the advantages of high treatment efficiency and good treatment effect.
[0031] like Figure 2 and Figure 3 As shown, in one embodiment, the solid-liquid separation device 200 of this application is used to perform solid-liquid separation on the aquaculture wastewater output from the aquaculture pond 100 in order to remove heavy solid pollutants from the aquaculture wastewater.
[0032] In one embodiment, the solid-liquid separation device 200 further includes an inlet pipe 230, the outlet end of which is connected to an inlet 211. The inlet end of the inlet pipe 230 is used to extend into the aquaculture pond 100, and the inlet 211 is located above the inlet end of the inlet pipe 230. The aquaculture wastewater output from the aquaculture pond 100 can flow into the solid-liquid separation device 200 through the inlet pipe 230 and the inlet 211 in sequence for solid-liquid separation.
[0033] Specifically, traditional aquaculture ponds use bottom drainage, resulting in a large volume of wastewater at the bottom due to gravity. This causes the aquatic organisms to easily flow out with the wastewater. The solid-liquid separation device 200 of this application employs a specific inlet method: the aquatic wastewater enters the device through a higher inlet 211 for solid-liquid separation. This prevents smaller aquatic organisms from being discharged with the wastewater to subsequent treatment units during drainage. Furthermore, traditional bottom drainage methods rely on valves on the drain pipe to control the discharge volume. These valves are prone to clogging, and operation is not always convenient. The solid-liquid separation device 200 of this application, however, eliminates the risk of valve clogging because no large amounts of aquatic organisms are discharged through the drain pipe, resulting in more accurate and stable discharge volume control.
[0034] like Figure 4As shown, in one embodiment, the outlet 212 is provided with an outlet pipe 240. The first end of the outlet pipe 240 extends into the housing 210 and surrounds the filter element 220. The second end of the outlet pipe 240 extends out of the housing 210. The first end of the outlet pipe 240 is provided with a plurality of perforations at intervals. The water separated from the sewage (i.e., clear liquid) can flow into the first end of the outlet pipe 240 through the perforations and then be discharged to the outside through the second end of the outlet pipe 240.
[0035] like Figure 2 As shown, in one embodiment, the filter element 220 is a hollow cubic grid structure. A first opening 221 is provided in the center of the top wall of the filter element 220, and a second opening 222 is provided in the center of the bottom wall of the filter element 220. The first opening 221 and the second opening 222 are aligned in the height direction of the filter element 220, and filter holes are provided on the four opposite side walls of the filter element 220.
[0036] like Figure 2 As shown, in one embodiment, the solid-liquid separation device 200 further includes a siphon inlet pipe 250, which is disposed on the side wall of the housing 210. The siphon inlet pipe 250 is used to inject water into the housing 210 to change the water level inside the housing 210, thereby triggering a siphon, so that the wastewater to be treated can automatically flow into the housing 210 through the inlet 211 by siphon. By adopting a siphon-based non-powered water intake method, the wastewater to be treated can automatically flow into the housing 210 through the inlet 211 without additional power, eliminating the need for an inlet pump and effectively reducing the operating energy consumption of the solid-liquid separation device 200.
[0037] Specifically, the water injected into the shell 210 by the siphon pipe 250 may include at least one of clean water (e.g., tap water), raw sewage (e.g., aquaculture wastewater), and circulating water. In practice, the outlet 212 is first blocked, and the shell 210 is filled with water through the siphon pipe 250. Then, the outlet 212 is opened to lower the water level in the shell 210, thereby triggering a siphon. This allows the sewage to be treated to flow into the shell 210 automatically through the inlet 211 without additional power.
[0038] like Figure 4As shown, in one embodiment, the solid-liquid separation device 200 further includes an aeration backwashing assembly 260, which is disposed within the housing 210 and located near the bottom of the filter element 220. Specifically, when the filter element 220 is covered with solid contaminants (such as uneaten food or feces), causing poor water flow, the aeration backwashing assembly 260 cleans the filter element 220 by aeration backwashing, promptly removing the solid contaminants adhering to the filter element 220. Simultaneously, the solid contaminants detached from the filter element 220 can be discharged through the second opening 222 of the filter element 220 and settle at the bottom of the housing 210, ensuring the normal operation of the filter element 220. Furthermore, this solution, by employing aeration backwashing, eliminates the need for a backwash drainage pump, resulting in lower energy consumption.
[0039] In one embodiment, the aeration backwashing assembly 260 includes an aeration pipe 261 and a plurality of aeration heads 262. The aeration pipe 261 surrounds the outer periphery of the filter element 220, and the plurality of aeration heads 262 are spaced apart on the aeration pipe 261 circumferentially. Further, the aeration backwashing assembly 260 also includes an air inlet pipe 263, one end of which is connected to the aeration pipe 261, and the other end of which extends out of the housing 210 through the side wall of the housing 210.
[0040] like Figure 4 As shown, in one embodiment, the solid-liquid separation device 200 further includes an exhaust pipe 270, which is disposed on the top of the housing 210. The exhaust pipe 270 is used to discharge excess gas output by the aeration backwashing component 260, as well as foam formed during the contact between organic matter containing protein in the sewage and the gas output by the aeration backwashing component 260.
[0041] Specifically, the aeration backwashing component 260 also functions as a protein separation unit for wastewater. When the aeration backwashing component 260 starts aeration, the gas injected into the wastewater forms bubbles that are broken down by the filtration component into fine bubbles. In this state, when organic pollutants containing protein in the wastewater come into contact with these bubbles, foam is formed. This foam can eventually be discharged to the outside through the exhaust pipe 270 provided at the top of the shell 210, thereby achieving a large-scale removal of organic matter containing protein from the wastewater. Therefore, compared with traditional solid-liquid separation equipment, the solid-liquid separation device 200 of this application integrates sedimentation, filtration, and protein separation functions into one unit. The solid pollutants separated from the wastewater (such as uneaten feed and feces) are discharged after sedimentation, resulting in a higher discharge concentration.
[0042] like Figure 4As shown, in one embodiment, a partition 280 is provided inside the housing 210 to divide the interior of the housing 210 into a first space 213 and a second space 214 distributed from top to bottom. A filter element 220 is disposed in the second space 214. The partition 280 is provided with through holes. An exhaust pipe 270 is connected to the first space 213. Excess gas and foam output by the aeration backwashing assembly 260 can enter the second space 214 through the holes and then be discharged to the outside through the exhaust pipe 270.
[0043] Furthermore, the partition 280 includes a first inclined plate 281 and a second inclined plate 282 connected to each other. Both the first inclined plate 281 and the second inclined plate 282 are obliquely placed inside the housing 210, and the inclination directions of the first inclined plate 281 and the second inclined plate 282 are opposite. The first inclined plate 281 and the second inclined plate 282 form an inverted V-shaped structure, and multiple through holes are provided at intervals at the connection between the first inclined plate 281 and the second inclined plate 282. Specifically, multiple rows of through holes are provided on the side where the first inclined plate 281 and the second inclined plate 282 are connected to each other, and each row of through holes includes multiple through holes spaced apart along the same straight line.
[0044] like Figure 4 As shown, in one embodiment, a sludge hopper 215 is formed at the bottom of the housing 210. The sludge hopper 215 is used to collect solid pollutants separated from the sewage. A sludge discharge pipe 216 is provided at the bottom of the sludge hopper 215. The sludge discharge pipe 216 is used to discharge the solid pollutants collected by the sludge hopper 215 to the outside.
[0045] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.
Claims
1. A solid-liquid separation device, characterized in that, include: The housing has an inlet and an outlet on its side wall, with the inlet located above the outlet. as well as A filter element is disposed inside the housing, and the top and bottom of the filter element are respectively provided with a first opening and a second opening; The wastewater to be treated can flow into the housing through the inlet and into the filter element through the first opening. Under the solid-liquid separation action of the filter element, the water separated from the wastewater can flow out of the filter element through the filter holes on the periphery of the filter element and then flow out of the housing through the outlet; and the solid pollutants separated from the wastewater can be discharged from the filter element through the second opening and settle to the bottom of the housing.
2. The solid-liquid separation device according to claim 1, characterized in that, The filter element is a hollow cubic grid structure. The first opening is provided in the center of the top wall of the filter element, and the second opening is provided in the center of the bottom wall of the filter element. The filter holes are provided on the four opposite side walls of the filter element.
3. The solid-liquid separation device according to claim 1, characterized in that, The solid-liquid separation device also includes a siphon pipe, which is disposed on the side wall of the shell. The siphon pipe is used to inject water into the shell to change the water level in the shell and thereby trigger a siphon, so that the wastewater to be treated can automatically flow into the shell through the inlet by siphon.
4. The solid-liquid separation device according to claim 1, characterized in that, The solid-liquid separation device further includes an aeration backwashing assembly, which is disposed inside the housing and located near the bottom of the filter element.
5. The solid-liquid separation device according to claim 4, characterized in that, The aeration backwashing assembly includes an aeration pipe and multiple aeration heads. The aeration pipe surrounds the outer periphery of the filter element, and the multiple aeration heads are spaced apart on the aeration pipe along its circumference.
6. The solid-liquid separation device according to claim 4, characterized in that, The solid-liquid separation device also includes an exhaust pipe, which is located at the top of the housing. The exhaust pipe is used to discharge excess gas output by the aeration backwashing component, as well as foam formed during the contact between the organic matter containing protein in the wastewater and the gas output by the aeration backwashing component.
7. The solid-liquid separation device according to claim 6, characterized in that, The housing is provided with a partition to divide the interior of the housing into a first space and a second space distributed from top to bottom. The filter element is disposed in the second space. The partition is provided with a perforation. The exhaust pipe is connected to the first space. Excess gas output by the aeration backwashing assembly and the foam can enter the second space through the perforation and then be discharged to the outside through the exhaust pipe.
8. The solid-liquid separation device according to claim 7, characterized in that, The partition includes a first inclined plate and a second inclined plate connected to each other. The first inclined plate and the second inclined plate are both placed obliquely inside the housing, and the first inclined plate and the second inclined plate are inclined in opposite directions. The first inclined plate and the second inclined plate form an inverted V-shaped structure. A plurality of through holes are provided at intervals at the connection between the first inclined plate and the second inclined plate.
9. The solid-liquid separation device according to claim 1, characterized in that, The solid-liquid separation device also includes an inlet pipe, the outlet of which is connected to the inlet, the inlet of which extends into the aquaculture pond, and the inlet is located above the inlet of the inlet of the inlet pipe. The aquaculture wastewater output from the aquaculture pond can flow into the solid-liquid separation device through the inlet pipe and the inlet in sequence for solid-liquid separation.
10. The solid-liquid separation device according to claim 1, characterized in that, It also includes at least one of the following technical solutions: A sludge hopper is formed at the bottom of the shell; and The water outlet is provided with a water outlet pipe. The first end of the water outlet pipe extends into the housing and surrounds the filter element. The second end of the water outlet pipe extends out of the housing, and the first end of the water outlet pipe is provided with multiple perforations at intervals.