ratelasas.blogg.se - Rotary vacuum filter design

It is entirely automatic in action and thus the man-power requirement is very low.Ģ. B : Flow sheet for continuous vacuum filtration Advantages of Rotary drum filter :ġ. Usually, one-third of the cycle is used for filtration, one-half for washing and air drying and one-sixth for cake removal.įig.Once the cake is removed from the drum sector, it re-enters the slurry and the cycle is repeated. A little air is blown in under the cloth to aid the removal of the cake. After the cake of solids has been sucked as dry as possible, vacuum is cut off and the cake is removed by scrapping it off using a adjustable doctor's knife. After washing, the cake enters into a drying zone as the drum rotates where the cake is partially dried by sucking air through the cake of solids. The wash liquid leaves the filter through the rotary valve and is collected separately in a separate tank. As the portion of the drum on which the cake is formed comes out of the slurry, the cake is washed by spraying wash liquid.The filtrate from the compartment then goes to a filtrate collecting tank through the internal pipe and rotary valve. With higher speeds, thinner cake will be formed and consequently, high rate of filtration will be achieved. Because of this, the liquid (filtrate) is sucked into the compartment and solids get deposited on the cloth to form a cake of the desired thickness which can be regulated by adjusting the speed of the drum. Vacuum is then applied to the portion of drum which is submerged in the slurry through the rotary valve.

The drum is immersed to the desired depth in the slurry which is mildly agitated to prevent the settling of the solids.

These materials give much improved corrosion resistance for many slurries.

Apart from cast iron, the other materials of construction of this filter include stainless steel, titanium, plastics such as PVC, etc.

As the drum rotates, vacuum and air are alternately applied to each compartment.

The annular space between the two drums is divided into number of compartments/sectors by radial partitions and separate connection is made between the compartments and a special type of rotary valve.

Inside the outer drum, there is a smaller drum with a solid surface. A filter medium such as canvas covers the outer surface of the drum which turns at 0.1 to 2 r/min in an agitated slurry trough.

The outer surface of the drum is formed of perforated plate.

It may be from 50 to 400 cm in diameter and 50 to 800 cm long.

It consists essentially of a cylindrical sheet metal drum mounted horizontally. In this filter filtration, washing, partial drying and discharge of cake all take place automatically.

A rotary drum filter is the most common type of continuous vacuum filter.

With thousands of quality suppliers & manufacturers, we are sure that they can provide all equipment for sale, services and solutions for your various industrial applications. It's well known that product quality and safety is a stronger priority for this equipment industry and also for the buyers, here you are offered a greater chance to find trustworthy manufacturers & factories who are delivering high levels of performance, efficiency and reliability in their products all the time.

Besides, their competitive & cheap price of Rotary Drum Filter factory would get you an edge in your own market. If you are interested in China Rotary Drum Filter, You will be amazed by the variety of the product choices such as water treatment, water filter, drum filter. Our China manufacturers & suppliers will provide a full-service to keep you up and running and meet your unique equipment requirements. With hundreds of thousands of products to choose from and an ever growing product range, your industrial equipment needs are sure to be met here.