Working principle

Rake tooth chain rotary separation principle: The rotary mechanical grille is composed of a set of unique rake teeth assembled into a rotary grille chain. Driven by the motor reducer, the rake tooth chain rotates in the reverse direction of the water flow. When it runs to the upper part of the equipment, under the guidance of grooved wheels and curved rails, each group of rake teeth generates relative self-cleaning movement. Most of the solid substances fall by gravity, and a small amount of impurities stuck on the rake teeth are cleaned by the cleaner moving in the reverse direction.

Drum interception separation principle: For the drum mechanical grille, when sewage flows through the grille drum composed of parallelly arranged and evenly spaced bars, the gap between the bars can be adjusted according to needs. Large-particle solid waste is intercepted, and fine suspended particles and liquid pass through smoothly.

Structural composition

Driving device: Generally composed of a motor, reducer, etc., it provides power for the rotation of the grille to ensure that the grille can operate at the set speed and direction.

Rotating shaft and grille blade/rake tooth: The rotating shaft connects the driving device and the grille blade or rake tooth and drives them to rotate. The grille blade or rake tooth is the part that directly contacts the impurities in sewage and is responsible for intercepting and separating suspended solids and impurities.

Cleaning device: Such as scrapers, cleaning combs, etc., it is responsible for regularly removing the solid waste intercepted on the grille blade or rake tooth to prevent the grille from being blocked and ensure the filtering efficiency and normal operation of the grille.

Control system: It can realize the automatic control of the equipment. According to parameters such as the liquid level difference before and after the grille and time, it can automatically control the operation and stop of the equipment. It can also monitor the operating status of the equipment and has functions such as fault alarm.

Characteristics

High degree of automation: It can operate automatically according to preset programs and parameters without frequent manual operation, reducing labor costs and improving work efficiency.

High separation efficiency: It can effectively intercept and separate various shapes and sizes of impurities and suspended solids in sewage, achieve efficient solid-liquid separation, and provide good conditions for subsequent water treatment processes.

Low power consumption: The energy consumption during equipment operation is low. By adopting a reasonable driving method and structural design, while ensuring the treatment effect, the energy consumption is reduced.

Good corrosion resistance: Usually made of corrosion-resistant materials such as stainless steel and polyester, it can operate stably for a long time in various corrosive water quality environments and prolong the service life of the equipment.

Low maintenance cost: It has strong self-cleaning ability and is not prone to blockage. The daily maintenance workload is very small. Only regular inspection, cleaning and simple maintenance are required.

Application fields

Urban sewage treatment: As a pretreatment equipment for urban sewage treatment plants, it can effectively remove large-particle impurities such as suspended solids and garbage in sewage, protect subsequent treatment equipment and improve sewage treatment efficiency.

Tap water industry: Used at the water inlet of a water treatment plant to filter out impurities such as leaves, branches and algae in the water source to ensure the quality and purity of the water supply.

Power plant water inlet: Intercept floating objects and suspended solids in water sources such as rivers and lakes to prevent them from entering the power plant's circulating water system and avoid blocking and damage to equipment.

Industrial wastewater treatment: In the wastewater treatment processes of industries such as textiles, food processing, papermaking and leather, as a pre-screening equipment, it removes impurities such as fibers, waste residues, peels and hairs in wastewater to reduce the burden on subsequent treatment processes.

Selection points

Processing water volume: Select the appropriate specification of rotary mechanical grille according to the actual sewage flow to be treated to ensure that the water passing capacity of the equipment can meet the processing requirements.

Amount and composition of grille slag: Fully estimate the occurrence amount of grille slag in the local sewage and analyze the composition of grille slag, such as particle size, shape, hardness, etc., so as to select the appropriate rake tooth gap and grille type.

Installation conditions: Consider factors such as installation space, channel size and installation angle of the equipment to ensure that the equipment can be installed and operated smoothly.

Material requirements: According to the corrosiveness and other characteristics of the water quality, select the appropriate material. For example, stainless steel material is suitable for water with strong corrosiveness, while engineering plastic material has better wear resistance and impact resistance.

 

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