Filter presses are increasingly used in different fields

      Talk about the knowledge of belt filter press about filter press is more and more used in different fields

With the development of modern industry, mineral resources are increasingly depleted, and the mined ore has been faced with the status of “poor, fine, and miscellaneous”. For this reason, people have to grind the ore even more finely. The material undergoes solid-liquid separation. Nowadays, in addition to high requirements for energy conservation and environmental protection, enterprises have put forward higher and broader requirements for solid-liquid separation technology and equipment. In response to the social needs of mineral processing, metallurgy, petroleum, coal, chemical, food, environmental protection and other industries, the application of solid-liquid separation technology and equipment has been driven, and the breadth and depth of its application fields are still expanding.

The reason why the filter press can flourish and is widely used in various industries, its greater advantage is positive pressure, high pressure dehydration, and the pressure difference is much larger than that of the traditional vacuum filter, so the filter cake has low moisture and energy Less consumption, less metal loss, and the filtrate is clear and transparent. As early as more than ten years ago, experts pointed out that the filter press is the only excellent equipment in all industrial filters that can ensure that the moisture content of the filter cake is below 10%, and it can be used without flocculants.

As far as the filter plate form is concerned, the filter press can be divided into a box type and a plate and frame type; in terms of the placement of the filter plate, there are vertical and horizontal types; in terms of the filter plate material, there are plastic, rubber, cast iron, Cast steel, carbon steel, stainless steel; whether the filter plate is equipped with rubber extrusion membrane, there are squeeze dehydration and non-squeeze dehydration; the filter plate is equipped with different number of filter cloth surfaces, including single-sided dehydration and double-sided dehydration Divide and so on. But no matter what kind of filter press, its working principle is firstly positive pressure dehydration, also called slurry dehydration, that is, a certain number of filter plates are tightly arranged in a row under the action of strong mechanical force, the surface of the filter plate and the surface of the filter plate A filter chamber is formed between, and the filter material is sent into the filter chamber under strong positive pressure. The solid part of the filter material entering the filter chamber is intercepted by the filter medium (such as filter cloth) to form a filter cake, and the liquid part is discharged through the filter medium The filter chamber achieves the purpose of solid-liquid separation. As the positive pressure increases, the solid-liquid separation becomes more thorough, but in terms of energy and cost, too high positive pressure is not cost-effective. After the pulp is dewatered, a filter press equipped with a rubber extruded membrane, the compressed medium (such as air, water) enters the back of the extruded membrane to push the extruded membrane to further dehydrate the extruded filter cake, which is called extrusion dehydration. After pulp dewatering or squeezing dewatering, compressed air enters one side of the filter cake to penetrate the filter cake, carrying liquid water from the other side of the filter cake through the filter cloth and out of the filter chamber for dehydration, which is called wind-blown dehydration. If there are filter cloths on both sides of the filter chamber, the liquid part can evenly pass through the filter cloths on both sides of the filter chamber and drain out of the filter chamber, which is dehydrated on both sides of the filter chamber. After the dehydration is completed, the mechanical pressing force of the filter plate is released, the filter plate is gradually pulled apart by a single piece, and the filter chamber is opened to unload the cake as a main work cycle. According to the different properties of the filtered material, the filter press can be set separately for pulp dewatering, squeezing dewatering, wind blowing dewatering or single or double-sided dewatering. The purpose is to reduce the moisture content of the filter cake to a large extent.

      Doyen specializes in providing belt press equipment for the Southeast Asian market. Welcome to visit our workshop and formulate a more scientific  plan based on the actual situation of your company. Welcome to visit joyce@doyenchina.com or visit https://www.doyenchina.com.