Sludge scraping and discharging system of radial flow sedimentation tank

Abstract

The utility model relates to the field of industrial wastewater treatment, in particular to a sludge scraping and discharging system of a radial flow sedimentation tank, which comprises a tank body, a perforated central cylinder, a water outlet tank, a sludge discharging pipe, a sludge scraper rotating device, a sludge scraper support, a sludge scraper lifting device, a sludge interface device and a PLC (programmable logic controller) automatic control cabinet, and a water inlet pipe and a sludge hopper are arranged at the bottom of the tank body. The mud scraper rotating device is provided with a torque detector, the resistance change of the mud scraper is monitored in real time, and when the resistance is too large, the PLC automatic control cabinet automatically controls the mud scraper lifting device to lift the whole mud scraper support so as to prevent the mud scraper from being damaged. By arranging the mud scraper lifting device, after the whole mud scraper support is lifted to a certain height, the mud scraper support can still rotate normally to scrape mud, and normal operation of the system is guaranteed. The sludge interface device is arranged above the sludge bucket, the height of the sludge surface is convenient to monitor, the PLC automatic control cabinet automatically controls opening and closing of the sludge discharging valve according to the height of the sludge surface, automatic sludge discharging is achieved, and the problems that sludge discharging is not timely and the water content of discharged sludge is high are solved.

Description

Technical Field

[0001] This utility model relates to the field of industrial wastewater treatment technology, and in particular to a sludge scraping and discharge system for a radial flow sedimentation tank. Background Technology

[0002] In the field of wastewater treatment, sedimentation tanks, as key treatment units, are of great significance for improving wastewater treatment efficiency and ensuring stable system operation. However, traditional suspended center-driven sludge scrapers in sedimentation tanks suffer from high scraping resistance and easy equipment damage when handling high sludge concentrations and thick sludge layers. Furthermore, the sludge discharge system suffers from problems such as untimely sludge discharge, high moisture content in the discharged sludge, and low sludge discharge efficiency due to the small size of the central sludge hopper. Utility Model Content

[0003] To address the problems of high scraping resistance, easy equipment damage, untimely sludge discharge, and high moisture content in the discharged sludge when traditional suspended center-driven sludge scrapers are used to handle high sludge concentrations and thick sludge layers in sedimentation tanks.

[0004] This utility model provides a sludge scraping and discharge system for a radial flow sedimentation tank, including a tank body, an inlet pipe and a sludge hopper at the bottom of the tank body, an open central cylinder, an outlet trough, a sludge discharge pipe, a sludge scraper rotating device, a sludge scraper support, a sludge scraper lifting device, a sludge interface device, and a PLC automatic control cabinet. The open central cylinder is located inside the tank body and is connected to the inlet pipe. The outlet trough is located around the top of the tank body and is equipped with an outlet pipe. The sludge discharge pipe is connected to the sludge hopper and is equipped with an electric sludge discharge valve. The sludge scraper rotating device drives the sludge scraper support to rotate. The sludge scraper rotating device is equipped with a torque detector and is connected to the sludge scraper support. The bottom of the sludge scraper support is equipped with a sludge scraper. The sludge scraper lifting device is used to raise and lower the sludge scraper support. The sludge interface device is used to identify the height data of the sludge interface in the sludge hopper. The PLC automatic control cabinet is electrically connected to the torque detector, the sludge scraper lifting device, and the sludge interface device, and is used to control the operation of the system.

[0005] Preferably, the sludge scraper rotating device further includes a first motor and a reducer. The first motor and the reducer are respectively installed at the upper and lower ends of the torque detector. The first motor is equipped with a first driver that is electrically connected to the PLC automatic control cabinet. The bottom of the reducer is equipped with a rotating shaft through a coupling. A gear is provided at the end of the rotating shaft away from the reducer. The gear is horizontally meshed with a slewing bearing.

[0006] Preferably, the sludge scraper lifting device includes a hoist and a second motor. The second motor is horizontally connected to the top of the hoist and is used to drive the hoist. The output shaft of the second motor is equipped with an encoder, which is electrically connected to the PLC automatic control cabinet. The second motor is also equipped with a second driver that is electrically connected to the PLC automatic control cabinet. The top of the sludge scraper bracket is equipped with a connecting shaft, and the output shaft of the hoist is connected to the connecting shaft. The connecting shaft is located at the vertical center of the slewing bearing.

[0007] In a further preferred embodiment, the sludge scraper lifting device also includes a limit switch, which is electrically connected to the PLC automatic control cabinet.

[0008] Preferably, the sludge interface device is one of an ultrasonic sludge interface device, a radar sludge interface device, or an optical sludge interface device.

[0009] Preferably, the scraper blade edge is provided with a high-pressure air curtain nozzle, and the high-pressure air curtain nozzle is connected to high-pressure gas.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] 1) The sludge scraper rotation device is equipped with a torque detector to monitor the resistance change of the scraper blade in real time. When the resistance is too high, the PLC automatic control cabinet automatically controls the sludge scraper lifting device to lift the scraper blade support as a whole to prevent damage to the scraper blade.

[0012] 2) By setting up a sludge scraper lifting device, the sludge scraper bracket can still rotate normally to scrape sludge after being raised to a certain height, thus ensuring the normal operation of the system.

[0013] 3) A sludge interface device is installed above the sludge hopper to facilitate monitoring of the sludge level. The PLC automatic control cabinet automatically controls the opening and closing of the sludge discharge valve according to the sludge level, realizing automatic sludge discharge and avoiding the problems of untimely sludge discharge and high sludge moisture content. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of a radial flow sedimentation tank sludge scraping and discharge system provided by this utility model.

[0015] In the diagram: 1-Pool body; 11-Sludge hopper; 12-Inlet pipe; 13-Perforated center cylinder; 14-Outlet trough; 15-Outlet pipe; 16-Sludge discharge pipe; 17-Electric sludge discharge valve; 2-Sludge scraper bracket; 21-Sludge scraper; 3-Sludge scraper rotating device; 4-Sludge scraper lifting device; 5-Sludge interface device; 6-PLC automatic control cabinet; 7-High-pressure air curtain nozzle. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] Reference Figure 1 A sludge scraping and discharge system for a radial flow sedimentation tank includes a tank body 1, with an inlet pipe 12 and a sludge hopper 11 at the bottom of the tank body 1. It also includes an open central cylinder 13, an outlet trough 14, a sludge discharge pipe 16, a sludge scraper rotating device 3, a sludge scraper support 2, a sludge scraper lifting device 4, a sludge interface device 5, and a PLC automatic control cabinet 6. The open central cylinder 13 is located inside the tank body 1 and is connected to the inlet pipe 12. The outlet trough 14 is located around the top of the tank body 1 and has an outlet pipe 15. The sludge discharge pipe 16 is connected to the sludge hopper 11. An electric sludge discharge valve 17 is provided; a sludge scraper rotating device 3 is used to drive the sludge scraper support 2 to rotate, and the sludge scraper rotating device 3 is equipped with a torque detector. The sludge scraper rotating device 3 is connected to the sludge scraper support 2, and a sludge scraper 21 is provided at the bottom of the sludge scraper support 2; a sludge scraper lifting device 4 is used to drive the sludge scraper support 2 to rise and fall; a sludge interface device 5 is used to identify the height data of the sludge interface in the sludge hopper 11; and a PLC automatic control cabinet 6 is electrically connected to the torque detector, the sludge scraper lifting device 4, and the sludge interface device 5 respectively. The PLC automatic control cabinet 6 is used to control the operation of the system.

[0018] The sludge scraper rotation device 3 is equipped with a torque detector to monitor the resistance changes of the scraper blade 21 in real time. When the resistance is too high, the PLC automatic control cabinet 6 automatically controls the sludge scraper lifting device 4 to lift the scraper blade support 2 as a whole to prevent damage to the scraper blade 21. By setting the sludge scraper lifting device 4, the scraper blade support 2 can still rotate and scrape sludge normally after being lifted to a certain height, ensuring the normal operation of the system. A sludge interface device 5 is installed above the sludge hopper 11 to facilitate monitoring of the sludge level. The PLC automatic control cabinet 6 automatically controls the opening and closing of the sludge discharge valve according to the sludge level, realizing automatic sludge discharge and avoiding problems such as untimely sludge discharge and high sludge moisture content.

[0019] In some embodiments, the sludge scraper rotating device 3 further includes a first motor and a reducer. The first motor and the reducer are respectively installed at the upper and lower ends of the torque detector. The first motor is provided with a first driver electrically connected to the PLC automatic control cabinet 6. The bottom of the reducer is equipped with a rotating shaft through a coupling. A gear is provided at the end of the rotating shaft away from the reducer. The gear is horizontally meshed with a slewing bearing.

[0020] The first motor provides the driving force required for sludge scraping, while the reducer lowers the output speed of the first motor to suit the sludge scraping operation. By setting up the first driver, the PLC automatic control cabinet 6 can dynamically adjust the start and stop of the first motor according to actual working conditions, achieving precise control of the sludge scraping process, which helps improve scraping efficiency while reducing energy consumption. The use of couplings and gears ensures smooth mechanical transmission.

[0021] Preferably, the sludge scraper lifting device 4 includes a lifting machine and a second motor. The second motor is horizontally connected to the top of the lifting machine and is used to drive the lifting machine. The output shaft of the second motor is equipped with an encoder, which is electrically connected to the PLC automatic control cabinet 6. The second motor is also equipped with a second driver that is electrically connected to the PLC automatic control cabinet 6. The top of the sludge scraper bracket 2 is equipped with a connecting shaft, and the output shaft of the lifting machine is connected to the connecting shaft. The connecting shaft is located at the vertical center of the slewing bearing.

[0022] The height of the scraper support 2 is adjusted by driving the hoist with a second motor. An encoder monitors the position of the scraper support 2 in real time, enabling the PLC automatic control to precisely adjust its height via the second driver, preventing sludge caking and damage to the scraper 21. The connecting shaft is positioned at the vertical center of the slewing bearing, ensuring balance during height adjustment and allowing the scraper 21 to rise or fall as needed to accommodate sludge layers of varying thicknesses.

[0023] In a further preferred embodiment, the sludge scraper lifting device 4 also includes a limit switch, which is electrically connected to the PLC automatic control cabinet 6.

[0024] By setting a limit switch to prevent the scraper bracket 2 from exceeding the safe range, when the scraper bracket 2 touches the limit switch, the PLC automatic control cabinet 6 controls the second motor to stop running through the second driver.

[0025] In some embodiments, the sludge interface device 5 is one of an ultrasonic sludge interface device, a radar sludge interface device, or an optical sludge interface device.

[0026] The preferred ultrasonic sludge interface meter is cost-effective, easy to install and maintain, and provides accurate measurements.

[0027] In some embodiments, the scraper blade 21 is provided with a high-pressure air curtain nozzle 7 at its edge, and the high-pressure air curtain nozzle 7 is connected to high-pressure gas.

[0028] High-pressure gas is released through the high-pressure air curtain nozzle 7 to form an air curtain, preventing sludge from adhering to the scraper blade 21, keeping the scraper blade 21 clean, improving scraping efficiency, avoiding secondary pollution, and reducing equipment maintenance frequency.

[0029] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sludge scraping and discharge system for a radial flow sedimentation tank, comprising a tank body, an inlet pipe and a sludge hopper at the bottom of the tank body, characterized in that: It also includes a perforated central cylinder, a water outlet trough, a sludge discharge pipe, a sludge scraper rotating device, a sludge scraper bracket, a sludge scraper lifting device, a sludge interface device, and a PLC automatic control cabinet; The perforated central cylinder is located inside the tank body and is connected to the inlet pipe; the outlet trough is located around the top of the tank body and is equipped with an outlet pipe; the sludge discharge pipe is connected to the sludge hopper and is equipped with an electric sludge discharge valve; the sludge scraper rotating device is used to drive the sludge scraper support to rotate, and the sludge scraper rotating device is equipped with a torque detector. The sludge scraper rotating device is connected to the sludge scraper support, and the bottom of the sludge scraper support is equipped with a sludge scraper; the sludge scraper lifting device is used to drive the sludge scraper support to rise and fall; the sludge interface device is used to identify the height data of the sludge interface in the sludge hopper; the PLC automatic control cabinet is electrically connected to the torque detector, the sludge scraper lifting device, and the sludge interface device, respectively, and is used to control the operation of the system.

2. The sludge scraping and discharge system for a radial flow sedimentation tank according to claim 1, characterized in that: The sludge scraper rotating device also includes a first motor and a reducer. The first motor and the reducer are respectively installed at the upper and lower ends of the torque detector. The first motor is equipped with a first driver that is electrically connected to the PLC automatic control cabinet. The bottom of the reducer is equipped with a rotating shaft through a coupling. A gear is provided at the end of the rotating shaft away from the reducer. The gear is horizontally meshed with a slewing bearing.

3. A system for scraping and removing sludge from a radial flow sedimentation basin according to claim 2, characterized in that: The sludge scraper lifting device includes a hoist and a second motor. The second motor is horizontally connected to the top of the hoist and is used to drive the hoist. The output shaft of the second motor is equipped with an encoder, which is electrically connected to the PLC automatic control cabinet. The second motor is also equipped with a second driver that is electrically connected to the PLC automatic control cabinet. The top of the sludge scraper bracket is equipped with a connecting shaft, and the output shaft of the hoist is connected to the connecting shaft. The connecting shaft is located at the vertical center of the slewing bearing.

4. A system for scraping and removing sludge from a radial flow sedimentation basin according to claim 3, characterized in that: The sludge scraper lifting device also includes a limit switch, which is electrically connected to the PLC automatic control cabinet.

5. The system according to claim 1 or 3, characterized in that: The sludge interface device is one of an ultrasonic sludge interface device, a radar sludge interface device, or an optical sludge interface device.

6. The sludge scraping and discharge system for a radial flow sedimentation tank according to claim 1, characterized in that: The scraper blade is equipped with a high-pressure air curtain nozzle on its edge, and the high-pressure air curtain nozzle is connected to high-pressure gas.

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