FQB5.5 River Management Float Aeration Machine

FQB5.5 River Management Float Aeration Machine With the increasing requirements of discharge standards for urban sewage treatment, in addition to conventional methods, the quality of discharged water after treatment is also affectedBOD5、CODIn addition to other indicators, some regions(market)The Environmental Protection Bureau has also put forward requirements for ammonium nitrogen, therefore, using conventional activated sludge method to treat sewage can no longer meet the above requirements. In order to meet this emission standard, oxidation ditch is often used to treat small amounts of water, while for sewage treatment plants with large amounts of water, oxidation ditch is commonly usedAO(Anaerobic and aerobic)The processing technology of the law. At present, in anaerobic tanks, in order to achieve sufficient mixing of raw sewage and activated sludge without causing sludge to sink, the stirring part for underwater pushing and stirring operations is submerged in water, and its driving part is located above the water surface and transmitted to the stirring part through a transmission shaft. The driving part is installed on a traveling frame that can translate along the tank, thereby driving the driving and stirring parts to work throughout the tank. However, this device is both large and complex, unable to meet the requirements, and its energy consumption is also high. Therefore, it is necessary to seek a device that can fully mix the raw sewage and activated sludge in the anaerobic tank, while also increasing the flow rate and pushing flow at the bottom of the tank, so that the sludge does not sink. However, there are currently no similar products in China.

The purpose of this utility model is to provide a device that not only meets the above requirements, but also requires good water and oil sealing performance when working underwater, and has a certain safety working alarm device, so as to be able to work reliably underwater for a long time without the need for frequent disassembly for inspection.

To achieve the above objectives, an underwater agitator is provided, which includes a driving motor with an output shaft; A slurry shaft driven by a driving motor; A helical slurry fixed at the output end of the aforementioned slurry shaft; A pair of transmission gears fixed to the output shaft end of the motor and the other end of the slurry shaft and meshing with each other; A slurry box is installed inside and supported by two sets of spaced apart rolling bearings, forming a first oil storage chamber between the two sets of bearings inside the slurry box; A middle box connected to one end of the motor housing and one end of the slurry box, which is installed inside and supported by a rolling bearing for the motor output shaft, and forms a second oil storage chamber between it and the slurry box to accommodate the meshing gear pair; In addition, a mechanical dynamic seal component is installed inside the intermediate box between the rolling bearing supporting the motor output shaft and the motor, to prevent lubricating oil in the second oil storage chamber from entering the motor winding coil; Another mechanical dynamic seal component is installed on the aforementioned shaft between the shaft box and the helical slurry to prevent external water from seeping into the motor through the first and second oil storage chambers. The component is contained by a bearing seat installed on the seal component, with one end fixedly connected to the other end of the shaft box; A sealing ring is provided at the interface between the intermediate box and the motor housing and the slurry box, as well as at the interface between the slurry box and the bearing seat, to prevent external water from infiltrating into the mixer; In addition, there is also a water leakage alarm sensor, whose probe extends into the first oil storage chamber through a hole on the slurry box. It is electrically connected to the electric control equipment set on the water surface, so that when the amount of water in the lubricating oil that seeps into the first oil storage chamber reaches a certain value(in compliance with10％)Automatically control the mixer to stop. In addition, there is a fixed installation of a straight cylindrical conduit that surrounds the helical slurry and is coaxial with the axis of rotation of the helical slurry. It is basically open at both ends in one axial direction, and through its synergistic effect with the helical slurry, it can meet the flow field requirements for obtaining longer processes.

Technical characteristics of FQB5.5 river treatment float aerator
The FQB5.5 river treatment float aerator is different from surface aerators and bottom aeration systems in water tanks. It not only has the ability to push flow in the circumferential direction, but also has the function of deep dissolved oxygen; It can stir and oxygenate water bodies and sludge in deep waters, significantly enhancing the biological treatment capacity.

1. The Revolution of Inflatable and Blended Mixing Technology
The FQB float aerator adds a stirring device to the original aerator, which significantly improves the oxygenation capacity and performance of the equipment.
2. High performance composite impeller
The hydraulic performance of the composite impeller is designed using computers and simulated working conditions. The entire impeller is cast in one go and has a relatively stable blade shape. Through dynamic balance testing, the efficient performance and smooth operation of the composite impeller are ensured.
3. The unity of nitrification and denitrification
During the nitrification process, the blower and motor are turned on simultaneously, and the air flow is in the same direction as the pushing flow. The shearing impeller cuts into small bubbles, which are carried by the strong water flow generated by the mixing impeller, and the nitrification process is completed under the action of aerobic organisms.
4. In denitrification, only the motor is turned on and no air is injected into the water. The denitrification process is completed under the action of anaerobic and facultative microorganisms., Nitrification and denitrification are integrated, which is the organic unity of aeration machinery and stirring machinery.

FQB5.5 River Management Float Aeration MachineBy using a motor and an impeller for direct transmission, the centrifugal force generated by the rotation of the impeller is used to expel surrounding water and create a low-pressure zone for sucking in water flow. At the same time, a vacuum is created at the inlet of the impeller to suck in air. In the mixing chamber, air and water are fully mixed to form a uniform mixture of air and water, which is quickly discharged under the action of centrifugal force.

Due to the extremely strong water jet, effective water circulation is created, causing the air to be sheared into a large number of tiny bubbles. Greatly increasing its surface area, and due to the slow rise of bubbles, a large amount of oxygen in the air dissolves in water, making the power efficiency of this machine superior to other types of aerators.

The bearings of QXB centrifugal aerator are all imported NSK lubricated bearings, with a designed service life of over 100000 hours. The intake rod and aerator end face of the new centrifugal aerator are sealed with O-ring gasket sealant for radial sealing. The cable inlet seal uses a specially processed water seal head to block external liquids from entering the motor. The axial seal uses a bidirectional mechanical seal to seal the motor and oil chamber separately. The external surface is coated with multiple layers of anti-corrosion paint and polyurethane paint to effectively prevent surrounding liquids from corroding and leaking onto the surface of the new centrifugal aerator.

The inspection method is: Before the final installation of the submersible aerator, look up at the suction port of the submersible aerator from the bottom and rotate the impeller counterclockwise. If several centrifugal submersible aerators are connected to a controller, each aerator must be inspected separately. If the rotation direction is incorrect, the position of any two of the three-phase wires on the controller can be exchanged to change the rotation direction