A precision filter for a pipe and trench sewerage system

Abstract

This utility model relates to a precision filter for a pipeline sludge treatment system. It adopts an integrated box-type design, with the core component being an inclined cylindrical fine grid made of 304L stainless steel, achieving a filtration accuracy of 2mm. Equipped with a drive unit, central feed tank, and flushing pipelines, it achieves automatic cleaning, high-efficiency filtration, and dewatering functions. It boasts advantages such as high filtration efficiency, high automation, energy saving and environmental protection, strong corrosion resistance, and safety and reliability. It effectively removes fine impurities and suspended solids from sludge, reducing the burden on subsequent treatment processes and improving the overall performance and stability of the pipeline sludge treatment system.

Description

Technical Field

[0001] This utility model relates to the field of pipeline sludge treatment technology, specifically a precision filter for pipeline sludge treatment systems. Background Technology

[0002] In the process of treating sludge in pipelines, precision filters are crucial for removing fine impurities and suspended solids from the sludge. Traditional filtration equipment has several shortcomings: low filtration accuracy, typically only able to trap larger particles, and unable to effectively remove fine particles smaller than 5mm in diameter. These fine particles enter subsequent treatment stages with the water flow, increasing the burden on downstream equipment, reducing treatment efficiency, and affecting the final treatment effect; lack of efficient automatic cleaning function, prone to clogging, and rapid decline in filtration efficiency. Once clogged, frequent manual cleaning is required, increasing labor intensity and maintenance costs, and causing interruptions in the treatment process, affecting the continuity and stability of the treatment system; poor corrosion resistance and durability of the equipment materials, easily leading to corrosion and wear problems in long-term contact with sludge environments containing corrosive substances and abrasive particles, shortening the service life of the equipment, increasing maintenance costs, and equipment downtime. Therefore, developing a high-efficiency and stable precision filter is of great significance for improving the performance of pipeline sludge treatment systems. Utility Model Content

[0003] The present invention aims to provide a precision filter for a pipeline sludge treatment system to improve filtration accuracy, achieve automatic cleaning, enhance the corrosion resistance and durability of the equipment, and reduce maintenance costs.

[0004] To achieve the above objectives, this utility model is implemented as follows: A precision filter for a pipeline sludge treatment system includes an integrated box-type filter body with an inclined cylindrical fine screen inside. The fine screen is made of perforated 304L stainless steel with an inclination angle of 35°~45° to trap scum, sediment, and suspended solids in the sludge. A drive unit is installed on top of the filter, driven by a geared motor to rotate the fine screen, and is equipped with an over-torque protection mechanism. A central feed trough contains a conveying screw for pressing and dewatering the screen residue and discharging it into subsequent equipment. A flushing pipeline is connected to the filter, covering the entire length of the screen, and uses tap water for flushing and unloading. A scraper brush is also included, which works in conjunction with the fine screen to scrape off the screen residue as the screen rotates.

[0005] The precision filter for the pipeline sludge treatment system has a fine grid with circular holes and a filtration accuracy of 2mm.

[0006] The precision filter for the pipeline sludge treatment system, with a screw conveyor and pressing device installed in the middle of the drum, is installed at a 35° angle to achieve upward conveying and pressing discharge of sludge.

[0007] The precision filter used in the pipeline sludge treatment system is equipped with a motor overload protection function. It automatically stops when the load exceeds the limit. After the overload is cleared, it needs to be restarted manually by pressing a button. The grid drum and screw conveyor can be manually electrically controlled to reverse.

[0008] The aforementioned precision filter for pipeline sludge treatment systems uses 304L stainless steel for all parts in contact with materials. It features a box-type design and its main components include 304 stainless steel grids, spiral grooves, flushing pipes, nozzles, and 316 stainless steel bolts and other connecting parts.

[0009] The precision filter for the pipeline sludge treatment system includes a flushing pipeline with multiple nozzles that are evenly distributed along the length of the drum grid to ensure that the flushing water can fully cover the surface of the fine grid.

[0010] The precision filter used in the pipeline sludge treatment system has a gear reduction motor with F-class insulation and IP65 protection rating.

[0011] The precision filter for pipeline sludge treatment system is provided with an inspection port and an odor-proof cover, the cover being made of 304 stainless steel.

[0012] The precision filter used in the pipeline sludge treatment system has a flushing water pressure ≥8 bar and a flushing water volume ≤5 m³ / s. 3 / h.

[0013] The precision filter used in the pipeline sludge treatment system has a sludge discharge solids content of 35%.

[0014] The precision filter proposed in this utility model has the following advantages and features: 1. In terms of filtration performance, the fine grid structure design, combined with the inclined installation method and the "carpet effect," effectively traps fine impurities, achieving a filtration accuracy of up to 2 millimeters, thus ensuring high-quality and efficient filtration. Simultaneously, the automatic start-up mechanism based on water level difference, in conjunction with the drive unit, automatically completes the cleaning and slag removal processes, significantly reducing the need for manual intervention and effectively lowering the labor intensity of operators.

[0015] 2. From an energy conservation and environmental protection perspective, the equipment flushing water volume is strictly controlled to within 5 cubic meters per hour, and the water pressure is not lower than 8 bar. This ensures both the flushing effect and reasonable control of water consumption. In addition, the solid content of the discharged slag can reach 35%, which effectively reduces the burden on subsequent processing steps and helps to achieve energy conservation, consumption reduction, and efficient operation of the entire treatment system.

[0016] 3. Regarding equipment durability and reliability, all key components in contact with materials, such as fine screens, spiral channels, flushing pipes, and nozzles, are made of 304L stainless steel. Other components also extensively utilize stainless steel, offering excellent corrosion resistance and enabling long-term stable operation in harsh working environments. This significantly extends equipment lifespan while substantially reducing maintenance costs. The equipment is equipped with motor overload protection and an IP65 protection rating, comprehensively ensuring stable operation under complex conditions. This effectively mitigates the risk of failures caused by overload or environmental factors, ensuring the continuity and reliability of the production process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the pipe and channel sludge treatment system proposed in this embodiment.

[0018] Figure 2 This is a schematic diagram of the external structure of the precision filter proposed in this embodiment. Figure 1 .

[0019] Figure 3 This is a schematic diagram of the external structure of the precision filter proposed in this embodiment. Figure 2 .

[0020] Figure 4 This is a schematic diagram of the internal structure of the precision filter proposed in this embodiment. Figure 1 .

[0021] Figure 5 This is a schematic diagram of the internal structure of the precision filter proposed in this embodiment. Figure 2 . Detailed Implementation

[0022] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0023] like Figure 1As shown, a sludge treatment system for pipelines includes a sludge storage tank 10. A horizontal vibrating screen 12 is installed at the sludge inlet of the sludge storage tank 10. An automatic grab bucket 13 transports sludge from the sludge storage tank 10 to a feeding bin 14. The sludge outlet of the feeding bin 14 is connected to a washing drum 15. The front end of the washing drum 15 is connected to a first slag collection basket 17 via a first spiral extruder 16. The bottom end of the washing drum 15 is connected to a sand washing device 18 via a pipe. The bottom end of the sand washing device 18 is connected to a second slag collection basket 20 via a second spiral extruder 19. A fine filter device 21 is connected to the side of the sand washing device 18 via a pipe. The sludge outlet of the fine filter device 21 is connected to a third slag collection basket 22. The water outlet of the fine filter device 21 is connected to an intermediate water tank 23 via a pipe. The water outlet of the intermediate water tank 23 is connected to a hydrocyclone separator and a sand-water separator 24 via a pipe. The hydrocyclone separator and the sand-water separator 24... The sludge outlet is connected to the fourth slag collection basket 25. The outlets of the hydrocyclone separator and sand-water separator 24 are connected to the inclined plate settling tank 26 via pipes. The drainage hole of the inclined plate settling tank 26 is connected to the recycled water tank 27. The outlet of the recycled water tank 27 is connected to the washing drum 15 and the sand washing device 18 via pipes for rinsing the washing drum 15 and the sand washing device 18. The sludge storage tank 10 is semi-underground. Transport vehicles dump sludge from the pipeline into the semi-underground pipeline sludge storage tank 10 for receiving and storing feed.

[0024] like Figures 2-5 As shown, the precision filter, a key component of the system, has the following specific structure and operation: The precision filter adopts an integrated box-type design, with inclined cylindrical fine screens installed inside. The fine screens are made of perforated 304L stainless steel, with an inclination angle of 35°~45°, effectively trapping scum, sediment, and suspended solids in the sludge. A drive unit is installed at the top of the filter, driven by a geared motor to rotate the fine screens, and equipped with an over-torque protection mechanism to ensure safe operation. A central feed trough contains a conveying screw, which can press and dewater the screenings, discharging them into subsequent transport equipment or containers. In addition, the filter is equipped with a flushing pipeline covering the entire length of the screen, using tap water to flush and discharge the fine screens, ensuring continuous and efficient filtration.

[0025] In the process of treating sludge in pipelines, the high-efficiency filtration and automatic cleaning functions of precision filters significantly improve the system's processing efficiency. After the sludge has undergone preliminary washing, screening, and sand-water separation, it enters the precision filter for deep filtration. The special design and inclined installation of the fine screen effectively traps fine impurities in the sludge, while the qualified filtrate passes smoothly into subsequent treatment processes. As the filtration process proceeds, when the water level difference before and after the filter reaches a set value, the drive unit automatically starts, rotating the fine screen and lifting the screenings. During rotation, the scraper brush and flushing rod work together to discharge the screenings into a central trough. The conveying screw in the central trough further presses and dewaters the screenings, reducing the moisture content before discharging them into subsequent transport equipment or containers, achieving efficient treatment and transportation of the screenings.

[0026] The screw conveyor and pressing device are installed in the middle of the drum screen, with the entire machine installed at a 35° angle. Wastewater flows into the drum screen basket and exits along the channel, while waste is trapped inside the drum screen. Through a rotating screen, the waste is combed into the screw groove, achieving continuous upward conveying and pressing discharge. The drive unit is located on top of the integrated drum screen machine, driven by a geared motor to rotate the basket and screw conveyor smoothly and at a stable speed. It is equipped with an over-torque protection mechanism to ensure the stability and safety of the equipment during operation.

[0027] The grid is cylindrical and installed directly into the drainage channel at a 35° angle to the horizontal. It is made of high-quality 304L stainless steel with round holes, rejecting woven mesh. The flushing pipeline, as an accessory, includes all connecting pipes and valves, using tap water as the flushing source. Fixed pressure water pipes are securely installed, and the nozzles cover the entire length of the grid drum to ensure effective waste removal. The fine grid is equipped with motor overload protection; if the motor load exceeds a predetermined value, it will stop. Once the overload is cleared, the motor will restart manually via a button. The design of the grid drum and screw conveyor should allow for reverse operation via manual electrical control.

[0028] All parts in contact with materials are made of 304L stainless steel, featuring a box-type design. The main materials include 304 stainless steel grids, spiral channels, flushing pipes, nozzles, and 316 stainless steel bolts and other connectors. This material selection not only ensures the equipment's corrosion resistance and durability but also adapts to the complex operating conditions in pipeline sludge treatment, extending the equipment's service life and reducing maintenance costs.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A precision filter for use in a pipe trench sludge treatment system, characterized by: The filter body is an integrated box-type design, with an inclined cylindrical fine screen inside. The fine screen is made of perforated 304L stainless steel and has an inclination angle of 35°~45° to trap scum, sediment, and suspended solids in the sludge. A drive unit is installed on top of the filter, which drives the fine screen to rotate via a geared motor and is equipped with an over-torque protection mechanism. A central feed trough contains a conveying screw for pressing and dewatering the screen residue and discharging it into subsequent equipment. A flushing pipeline is connected to the filter, covering the entire length of the screen, and uses tap water to flush and discharge the sludge. The filter also includes a scraper brush, which works in conjunction with the fine screen to scrape off the screen residue as the screen rotates.

2. The precision filter for use in a sewerage sludge treatment system according to claim 1, characterized in that: The fine grid has circular holes and a filtration accuracy of 2mm.

3. The precision filter for use in a sewerage sludge treatment system according to claim 1, characterized in that: The screw conveyor and pressing device are installed in the middle of the drum grid, and the whole machine is installed at a 35° angle to realize the upward conveying and pressing discharge of waste.

4. The precision filter for use in a sewerage sludge treatment system according to claim 1, characterized in that: The motor is equipped with an overload protection function, which automatically stops the motor when the load exceeds the limit. After the overload is cleared, it needs to be restarted manually by pressing a button. The grid drum and screw conveyor can also be manually electrically controlled to reverse.

5. The precision filter for use in a sewer sludge treatment system according to any one of claims 1 to 4, characterized in that: All parts that come into contact with materials are made of 304L stainless steel. The box-type design includes 304 stainless steel grids, spiral grooves, flushing pipes and nozzles, as well as stainless steel 316 bolts and other connecting parts.

6. The precision filter for use in a sewerage sludge treatment system according to claim 1, characterized in that: The flushing pipeline includes multiple nozzles that are evenly distributed along the length of the drum grid to ensure that the flushing water can fully cover the surface of the fine grid.

7. The precision filter for use in a sewerage sludge treatment system according to claim 1, characterized in that: The gear reduction motor of the drive device is insulated with Class F insulation and has an IP65 protection rating.

8. The precision filter for use in a sewerage sludge treatment system according to claim 1, characterized in that: The filter housing is equipped with an inspection port and an odor-proof cover, which is made of 304 stainless steel.

9. The precision filter for use in a sewerage sludge treatment system according to claim 1, characterized in that: The filter's flushing water pressure is ≥ 8 bar, and the flushing water volume is ≤ 5 m 3 / h.

10. The precision filter for use in a sewerage sludge treatment system according to claim 1, characterized in that: The solid content of the sludge discharged from the filter is 35%.

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