Sewage treatment device

Abstract

The utility model relates to the technical field of sewage treatment equipment, in particular to a sewage treatment device which comprises a conical barrel shell, an end cover, an annular mounting plate, a multi-stage filtering unit, a centrifugal cavity and a backwashing system. More than two stages of filter screens with gradually changed filter grades from bottom to top are arranged in the cylinder body, and pollutants with different particle sizes are effectively removed by combining the design of the overflow weir; a spiral flow guide plate is arranged in a centrifugal cavity between the shell and the barrel, and large-particle impurities are separated through centrifugal force; and the backwashing spray head on the top end cover can be used for efficiently cleaning the filter screen to prevent blockage. In addition, the integrated design is adopted, so that the equipment size is reduced, and the problems of low single-stage filtering efficiency, poor back-flushing effect, high energy consumption and the like in the traditional sewage treatment equipment are solved. The device is compact in structure, simple and convenient to operate and maintain, has the advantages of high efficiency, energy conservation, environmental protection and the like, is suitable for treating sewage with complex water quality, and reduces the operation cost while ensuring the effluent quality.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment equipment technology, specifically to a wastewater treatment device. Background Technology

[0002] With increasing global water scarcity and escalating environmental pollution, wastewater treatment has become a crucial aspect of environmental protection. While traditional wastewater treatment filtration devices can meet basic purification needs to a certain extent, their efficiency and technological limitations are becoming increasingly apparent when dealing with complex water qualities.

[0003] Currently widely used single-stage filtration systems primarily rely on a single type of filter to intercept contaminants. Since contaminants of different particle sizes require different filter media for effective removal, a single filter can only provide effective filtration for particles of a specific size. Furthermore, for complex wastewater containing a wide range of impurities, filter clogging easily occurs, reducing filtration efficiency. To cope with such complex water conditions, multiple filtration processes are often required, which not only increases the overall size of the equipment but also raises maintenance costs and operational complexity. In addition, backwashing requires high pressure, is inefficient, and wastes a significant amount of water.

[0004] In view of the above problems, the present invention aims to propose a sewage treatment device that reduces the space occupied by the device through integrated design, improves filtration efficiency, optimizes the backwashing process to enhance the cleaning effect, and achieves the goal of efficient, energy-saving and environmentally friendly sewage treatment. Utility Model Content

[0005] The purpose of this invention is to provide a wastewater treatment device to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A wastewater treatment device includes an outer casing, with an end cap installed at the top of the outer casing;

[0008] The outer shell is a conical cylinder;

[0009] An annular mounting plate is provided at the top of the outer casing, and a water inlet is provided below the annular mounting plate;

[0010] The outer casing contains a filter unit fixed to the annular mounting plate;

[0011] The filtration unit includes a cylindrical body, in which two or more filter screens with gradually increasing filtration levels are installed from bottom to top. An overflow weir is provided above the filter screen at the top, and the overflow weir has a water outlet extending out of the outer shell.

[0012] The outer shell and the cylinder form a centrifugal cavity, and a spiral guide plate is provided inside the centrifugal cavity;

[0013] The lower end of the outer shell is provided with a slag discharge port, and the slag discharge port is provided with a slag discharge valve;

[0014] The end cap is equipped with a backwash nozzle.

[0015] Preferably, the spiral guide plate is disposed on the inner wall of the outer shell or the outer wall of the cylinder.

[0016] Preferably, the water inlet is located at the tangential inlet at the upper end of the spiral guide plate.

[0017] Preferably, the cylinder is provided with at least a first filter screen, a second filter screen and a third filter screen from top to bottom.

[0018] Preferably, the top of the outer wall of the cylinder is provided with a sealing ring plate that cooperates with the annular mounting plate for sealing, and the sealing ring plate is provided with a flange for sealing connection.

[0019] Preferably, the overflow weir includes an overflow plate disposed inside the closed ring plate, and the overflow plate has an overflow port.

[0020] Preferably, the height of the overflow weir is lower than the height of the inlet.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. By installing two or more stages of filters with gradually increasing filtration levels from bottom to top inside the cylinder, it can effectively remove pollutants of different particle sizes, improving the overall filtration effect. This design can adapt to complex water quality with a wide range of impurity particle sizes, reducing the efficiency reduction caused by clogging of a single filter.

[0023] 2. The compact design integrates physical filtration, centrifugal separation and backwashing cleaning into one unit, which greatly reduces the overall size of the equipment and saves space, making it more suitable for occasions with limited space.

[0024] 3. The centrifugal force generated by the spiral guide plate in the centrifugal cavity formed between the outer shell and the cylinder causes heavier particles to settle to the bottom and be discharged through the slag discharge port. This process does not require additional power support, thereby reducing energy loss and improving energy efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2This is a schematic diagram of the overall disassembled structure of this utility model.

[0027] Reference numerals: 100-Outer shell; 110-Inlet; 120-Spiral guide plate; 200-End cap; 300-Backwash nozzle; 400-Slag discharge valve; 500-Filter unit; 510-Third filter screen; 520-Second filter screen; 530-First filter screen; 540-Overflow weir; 550-Closed ring plate; 560-Outlet. Detailed Implementation

[0028] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments. Example 1

[0029] Figures 1 to 2 A wastewater treatment device is presented, including a housing 100, with an end cap 200 mounted on the top of the housing 100;

[0030] The outer shell 100 is a conical cylinder;

[0031] An annular mounting plate is provided at the top of the outer casing 100, and a water inlet 110 is provided below the annular mounting plate;

[0032] The outer casing 100 is fitted with a filter unit 500 fixed to the annular mounting plate;

[0033] The filter unit 500 includes a cylindrical body, in which two or more filter screens with gradually increasing filtration levels are installed from bottom to top. An overflow weir 540 is provided above the filter screen at the top, and the overflow weir 540 is provided with an outlet 560 extending out of the outer shell 100.

[0034] The outer shell 100 and the cylinder form a centrifugal cavity, and a spiral guide plate 120 is provided inside the centrifugal cavity;

[0035] The lower end of the outer shell 100 is provided with a slag discharge port, and the slag discharge port is provided with a slag discharge valve 400; of course, a slag discharge box can be provided at the slag discharge port, and the slag discharge valve 400 can be provided on the slag discharge box. The slag discharge valve 400 can be a pneumatic, electric or other slag discharge valve 400, and existing technology can be used.

[0036] The end cap 200 is equipped with a backwash nozzle 300 for backwashing the multi-stage filter screen.

[0037] In this embodiment, the core of the wastewater treatment device lies in utilizing a combination of physical filtration, centrifugal separation, and backwashing cleaning to reduce energy consumption, improve energy efficiency, and ensure efficient and energy-saving completion of wastewater treatment tasks. Furthermore, the integrated design of this wastewater treatment device reduces the overall size of the equipment, saving space.

[0038] The working principle of the wastewater treatment device described in this utility model is as follows:

[0039] Regarding multi-stage physical filtration: Wastewater enters the device through the inlet 110 located below the annular mounting plate at the top inside the outer casing 100, and first enters the filter unit 500 inside the cylinder. Because two or more stages of filter screens with gradually increasing filtration levels are installed from bottom to top inside the cylinder, as the water flows upward, particles are gradually intercepted by different levels of filter screens, effectively removing pollutants of different particle sizes and improving the overall filtration effect. An overflow weir 540 is provided at the top, and the clean water after the finest filtration is discharged through the outlet 560 on the overflow weir 540.

[0040] Regarding centrifugal separation filtration: A spiral guide plate 120 is provided in the centrifugal chamber formed between the outer shell 100 and the cylinder. When water containing impurities flows through this area, large particles of impurities will be subjected to centrifugal force, causing heavier particles to move downwards along the outer wall and eventually settle at the bottom slag discharge port for discharge. The slag discharge port is equipped with a slag discharge valve 400 to control the discharge process.

[0041] Regarding backwashing cleaning: To enable automatic backwashing and prevent filter clogging from affecting efficiency, backwash nozzles 300 are installed on the end cover 200. When backwashing is required, high-pressure clean water can be injected into the filter unit 500 through the nozzles to backwash the multi-stage filter screens, removing contaminants from the screens. Multi-stage backwashing reduces the rinsing pressure, improves backwashing efficiency, and is beneficial to wastewater treatment. Example 2

[0042] Based on the above embodiments, the spiral guide plate 120 can be installed in at least two ways: one is on the inner wall of the outer casing 100; the other is on the outer wall of the cylinder. Of course, the spiral guide plate 120 can also be installed in a detachable manner for easy replacement and maintenance. Example 3

[0043] Based on the above embodiments, in order to ensure the centrifugal separation effect, the water inlet 110 is set at the tangential inlet at the upper end of the spiral guide plate 120. Example 4

[0044] Based on the above embodiments, in order to ensure the multi-stage filtration effect, at least 3-5 filter screens are arranged sequentially from top to bottom inside the cylinder. Taking this embodiment as an example, a first filter screen 530, a second filter screen 520 and a third filter screen 510 are provided. Example 5

[0045] Based on the above embodiments, in order to improve the sealing of the top of the centrifuge chamber, prevent the filtered clean water from flowing back into the centrifuge chamber, and prevent sewage from entering the overflow weir 540 and contaminating the clean water, a sealing ring plate 550 is provided on the top of the outer wall of the cylinder to cooperate with the annular mounting plate for sealing. The sealing ring plate 550 is provided with a flange for sealing connection. During installation, sealing gaskets or sealing rings and other sealing components can be added to further ensure the sealing effect. Example 6

[0046] Based on the above embodiments, the specific structure of the overflow weir 540 can be simplified as follows: it includes an overflow plate disposed inside the closed ring plate 550, and the overflow plate is provided with an overflow port, and multiple overflow ports may also be provided. Example 7

[0047] Based on the above embodiments, in order to ensure processing efficiency and prevent excessive hydraulic pressure in the centrifuge chamber from affecting the water intake efficiency, the height of the overflow weir 540 is set to be lower than the height of the water inlet 110.

[0048] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sewage treatment device comprising an outer shell, a top end of which is provided with an end cover; characterized in that: the outer shell is a conical cylinder; an annular mounting plate is arranged on the inner top of the outer shell, below which is arranged a water inlet; a filter unit is sleeved in the outer shell and fixed on the annular mounting plate; the filter unit comprises a cylinder, in which are sequentially arranged two or more filter screens with gradually changing filter grades from low to high from bottom to top, above the filter screen at the top is arranged an overflow weir, which is provided with a water outlet extending out of the outer shell; a centrifugal cavity is formed between the outer shell and the cylinder, in which is arranged a spiral guide plate; a slag discharge port is arranged at the lower end of the outer shell, which is provided with a slag discharge valve; a backwashing nozzle is mounted on the end cover.

2. The sewage treatment device of claim 1, wherein: The spiral guide plate is arranged on the inner side wall of the outer shell or the outer side wall of the cylinder.

3. The sewage treatment device of claim 1, wherein: The water inlet is arranged at the tangent inlet of the upper end of the spiral guide plate.

4. The sewage treatment device of claim 1, wherein: At least first, second and third filter screens are sequentially arranged in the cylinder from top to bottom.

5. The sewage treatment device of claim 1, wherein: A sealing ring plate is arranged at the top of the outer side wall of the cylinder to cooperate with the annular mounting plate, which is provided with a flange plate for sealing connection.

6. The sewage treatment device of claim 5, wherein: The overflow weir comprises an overflow plate arranged inside the sealing ring plate, on which is arranged an overflow port.

7. The sewage treatment device according to any one of claims 1 to 6, characterized in that: The height of the overflow weir is lower than that of the water inlet.

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