How the filter press works
Filter press is a commonly used filtration equipment, which is widely used in chemical, environmental protection, food, pharmaceutical and other fields. It can separate the solid matter in suspension from the liquid, so as to achieve the purpose of purification, separation and concentration. This article will introduce the working principle, structure and operation method of the filter press in detail.
First, the working principle of the filter press.
The working principle of the filter press is mainly to separate the solid matter in the suspension through the action of pressure. The specific process is as follows:
1.Preparation stage: The suspension to be filtered is placed into the filter chamber of the filter press, the filter chamber door is closed, and the suspension in the filter chamber is pressurized.
2.Filtration stage: When the pressure reaches a certain value, the liquid in suspension is discharged through the filter cloth, while the solid matter is left in the filter chamber. At this point, the filter cloth acts as a filter medium, separating the solids from the liquids.
3.Discharge stage: When the filter chamber is filled with solid substances, close the feed valve, open the discharge valve, and discharge the solid substances out of the filter chamber. At the same time, open the filter chamber door to clean the residue on the filter cloth.
4.Washing stage (optional): To further remove residues adhered to the filter cloth, the filter cloth can be washed by adding wash water to the filter chamber. Then, the wash water is drained.
5.Repeat the above process: Repeat the process of the preparation stage, filtration stage, discharge stage and washing stage described above, and a large amount of suspension can be continuously filtered.
Second, the structure of the filter press.
The filter press is mainly composed of the following parts:
1.Frame: The frame of the filter press is used to support the entire equipment, including filter plates, filter cloths, pipes, valves and other components.
2.Filter Plate: The filter plate is the main component of the filter press, and its surface has grooves for placing the filter cloth. Both sides of the filter plate can be pressed against the filter cloth to form a filter chamber.
3.Filter Cloth: A filter cloth is a porous filter medium used to separate solids from liquids. It is placed in the grooves of the filter plate, forming the filter chamber.
4.Hydraulics: The hydraulics are used to provide the pressure required by the filter press. It includes components such as hydraulic pumps, cylinders, pipes, and valves.
5.Control system: The control system is used to control the entire workflow of the filter press, including the control of pressurization, discharge, washing and other processes.
3. The operation method of the filter press.
There are a few things to keep in mind when operating a filter press:
1.Select the appropriate filter cloth and filter plate according to the characteristics and requirements of the suspension to be filtered.
2.Prior to filtration, the suspension should be stirred or mixed sufficiently to ensure an even distribution of solids in the suspension.
3.During the filtration process, the pressure should be increased gradually to avoid increasing the pressure too quickly and causing the filter cloth to be damaged or the filtration effect to be poor.
4.When discharging, the feed valve should be closed first, and then the discharge valve should be opened to ensure the smooth discharge of the solid substance.
5.During the washing process, the flow and pressure of the washing water should be controlled to ensure that the washing effect is good and that water resources are not wasted.
6.During the operation, attention should be paid to the operation status of the filter press, and if any abnormalities are found, they should be dealt with in time. At the same time, the filter press should be regularly maintained and maintained to prolong its service life.
In short, as a commonly used filtration equipment, the working principle of the filter press is to use pressure to separate the solid substances in the suspension. Understanding the working principle, structure and operation method of the filter press will help to better apply this equipment and improve production efficiency and product quality.