Agitator mixers are extensively used in various water treatment industries including water purification, industrial sewage treatment, domestic sewage treatment, and tap-water purification.
Agitator mixers are extensively used in various water treatment industries including water purification, industrial sewage treatment, domestic sewage treatment, and tap-water purification. The agitator equipment used in the wastewater treatment process includes dissolving agitator mixer, mixing agitator mixer, flocculation agitator mixer, clarifier agitator, and digestion tank agitator. The primary purpose of using an agitator in wastewater treatment is to create specific hydraulic conditions that enable all colloidal particles to complete the flocculation process in the shortest time possible. This helps to achieve the best possible flocculation effect.
Agitator mixers are used in sewage treatment to coagulate and sediment the water. These mixers can achieve the required mixing strength in a short amount of time, ensuring that the mixing is fast, uniform, and sufficient. The coagulation and sedimentation mixing device for sewage treatment is made up of five main parts: the transmission device, working bridge, transmission shaft, impeller, and bottom bearing. When the raw water and coagulant or coagulant aid liquid flow through the mixing tank, the agitator creates a flow cycle that quickly and fully mixes the coagulant and water to meet the requirements of the coagulation process. The coagulation and sedimentation mixing device for sewage treatment has several advantages, such as minimal head loss, adaptability to water changes, and wide application.
The processes of flash mixing, coagulation, and flocculation are fundamental in the treatment of both industrial and municipal wastewater, which may contain colloidal solids, particles that are too small or light to be filtered out. These processes are critical in promoting sedimentation and agglomeration of larger particles, thereby facilitating their easy removal.
The flash mixing and coagulation stages entail the addition of specific chemicals to the raw water, aimed at fostering coagulation while attracting unfiltered or immiscible particles. Coagulants, such as ferric chloride (FeCl3), poly aluminum chloride (PAC) (Al2Cl(OH)5), and aluminum sulfate (Al2(SO4)3), are typically employed to attract these particles, thereby facilitating their agglomeration during flocculation. This process, which forms larger particles that can be easily settled, is essential in the effective treatment of industrial and municipal wastewater.
In conclusion, the processes of flash mixing, coagulation, and flocculation are critical in the effective treatment of wastewater, particularly those that contain colloidal solids. By promoting sedimentation and agglomeration of larger particles, these processes facilitate the easy removal of these solids, thereby ensuring that the treated water meets the required quality standards.
The flocculation agitator mixer is used to stir the coagulation stage of the water supply and drainage treatment process. The flocculation tank is typically divided into three stages, with each stage having a decreasing mixing intensity and a reduction in linear speed at the center of the agitator blade. This allows the agitator mixer to meet the flocculation law requirements and achieve different mixing intensities in each section of the flocculation process.
The coagulation process of water and wastewater involves three stages: mixing water and medicament, reacting, and separating flocs and water. A clarifier agitator is a special equipment used to perform these processes.
When it comes to the mixing tank’s agitator impeller, it’s important to ensure that it does not come into contact with the inlet and outlet water flow. The impeller should be designed to create a good upper and lower circulation of the water body, which is essential for effective mixing. This circulation should occur within the specified residence time, which is the time the water spends in the mixing tank. To achieve rapid and uniform mixing, the number of water circulations should be at least 1.5 times within the specified residence time. This means that the water should circulate through the mixing tank at least 1.5 times before it is discharged. By following these guidelines, you can ensure that your mixing tank’s agitator impeller is working effectively and producing the desired results.
Clarifiers separate solids from the liquid stream. In water & wastewater treatment the terms clarifier and sedimentation tank are synonymous.
Nakclean Clarifiers are widely used for continuous mechanical removal of settleable solids from wastewater. These clarifiers may be supported by either bridge or center columns. In a center feed design, the wastewater is carried to the center of the tank where it enters a circular well designed to distribute the flow equally in all directions. The sludge removal mechanism slowly revolves and may have two or four arms equipped with scrapers. The drive unit can be central or peripheral and can also be manufactured with a half/full scrapping arm. Additionally, they can be equipped with a scum removal system. Apart from conventional clarifiers, high-rate clarifiers with parallel plate separators and tube settlers are also available.
Type of Clarifiers:-
The two types of clarifiers are:
Central Drive Clarifier:
The central drive mechanism of the bridge is supported by a full-diameter structure. The scraper frames are attached to the drive shaft that is connected to the central gear. A bearing housing is located at the bottom to guide the drive shaft. The scraper frames hold the scrapers. The influent well is suspended from the bridge.
This unit is suitable for installation in the client’s concrete tank. Each unit will consist of:-
• Please find the revised and clearer version of the text below:
• – A fixed full bridge with a walkway and handrail that spans from one end to the center.
• – An influent (feed) well.
• – A drive arrangement that consists of a motor, gearbox, pulleys, V-belts, and base plate.
• – A heavy-duty bearing housing to handle undulations, torque, and loads.
• – A central shaft.
• – Rake arms with blades and tie rods.
• – Rake blades located in the sludge hopper.
The bridge is supported by a cast steel bearing at the center of the central pier and rests on wheel carriages with wheels and a drive unit at the periphery. The supplied wheels are either Garlon, C.I. polyurethane lined or cast steel. Rails are provided for the cast steel wheels. Additionally, the scrapers are suspended from the bridge, and a slip ring unit is mounted on the central bearing.
PERIPHERALLY DRIVEN CLARIFIERS 4 MT. DIA TO 50 MT. DIA
This unit is suitable for installation in the client’s concrete tank.
Each unit consists of:-
This is the description of the following items that are included in our scope:
– A rotating half bridge that comes with a walkway and handrails.
– An end drive that comprises a motor, gearbox, base plate, and V-belts.
– A central bearing housing and slip ring assembly.
– Rubberized C.I. wheels.
– A central cage.
– Clarifier rake arms along with blades.
Please note that all pipes, including inlet, outlet, and sludge pipes, are not included in our scope.
Nakclean Clarifiers have a unique design of additional scrapper blades in the hopper. This prevents any possible clogging and thus prevents costly shutdowns.
IN CLARIFIER FOLLOWING ITEMS ARE OPTIONAL:-
• V-notch weir plate.
• Skimmer blade.
• Scum baffle.
• Scum box.
• Telescopic arrangement (excluding piping and valves in an around sludge pit).
• Municipality Water Treatment Plant
• Clarifier Mechanism
• CETP-Common Effluent Treatment Plant
• CSTP –Common Sewage Treatment Plant
• Paper Industries for polishing
• Sludge Thickener
• Unit is Completely Assembled
• Low Installation
• Completely Automatic, Gravity in Gravity Out
• Reduced Floor Space
• Large Compartment Flocculation Tanks with Mixer for Extra Retention Time
• Meets EPA Discharge Limits for Metal Finishing Wastes
• Preserves the quality and durability of the steel because the outer wall and internal components are specially coated.
• Incorporates adjustable weir plates.
• Utilizes full-length skimmer arms and full-length scum troughs.
• Able to be constructed in 6 – 8 weeks.
• Improved design for easier maintenance
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