Filter press is a commonly used filtration equipment, which is widely used in chemical, petroleum, pharmaceutical, food and other fields. Due to its efficient and reliable filtration performance, filter presses have been widely used and recognized.
First, the structure of the filter press.
The filter press is mainly composed of the following parts:
1.Filter plate: The filter plate is the main component of the filter press, and its role is to support the filter cloth and form the filter chamber. In the filter chamber, the liquid is intercepted by the filter cloth and the solid particles are left in the filter chamber.
2.Filter cloth: Filter cloth is a special filter material, its function is to intercept the solid particles in the liquid, so that the solid particles remain in the filter chamber, and the liquid flows out through the filter cloth.
3.Pressing device: The function of the pressing device is to compress the filter plate to form a seal between the filter plates to ensure that the liquid is completely intercepted in the filter chamber.
4.Hydraulic system: The hydraulic system is the driving part of the filter press, and its role is to provide power for the hold-down device, so that the filter plate can be compressed.
5.Control system: The function of the control system is to control the operation of the filter press, including starting, stopping, alarming, etc.
Second, the working principle of the filter press.
The working principle of the filter press can be summarized as follows: at a certain pressure, the liquid flows into the filter chamber through the filter cloth, and the solid particles are intercepted in the filter chamber. Specifically, when the hydraulic system compresses the filter plate, a certain pressure difference is formed between the filter plate and the filter cloth. Under the effect of this pressure difference, the liquid is squeezed through the filter cloth and flows into the filter chamber, while the solid particles are left in the filter chamber. When the pressure difference reaches a certain value, the liquid cannot pass through the filter cloth and the filtration process ends.
3. Classification of filter presses.
Filter presses can be classified according to different classification methods:
1.Classified according to the mode of operation: it can be divided into batch filter press and continuous filter press. The batch filter press refers to only a part of the material at a time, and then re-feeding the material for the next treatment after the treatmentThe continuous filter press refers to the continuous input of materials and the completion of the filtration operation in the process of continuous flow.
2.Classified by driving mode: it can be divided into mechanical filter press and hydraulic filter press. Mechanical filter press refers to the mechanical transmission system to drive the pressing device;Hydraulic filter presses refer to the hydraulic system to drive the compaction device.
3.Classification by use: It can be divided into industrial filter press and laboratory filter press. Industrial filter presses typically handle large quantities of material and are used for large-scale productionLaboratory filter presses are often used for small-scale experiments or pilot phases.
Fourth, the application of filter press.
Due to their efficient and reliable filtration performance, filter presses have a wide range of applications in many areas:
1.Chemical industry: In the chemical industry, filter presses are mainly used to separate and purify various suspensions and solutions. For example, pulverized coal and moisture in coal slurry can be separated by using a filter pressIt is also possible to separate the solid-liquid mixture produced after a chemical reaction.
2.Petroleum industry: In the petroleum industry, filter presses are mainly used for oil-water separation, mud treatment, etc. For example, a large amount of oily wastewater is generated during oil production, and the oil and water in the sewage can be separated by using a filter pressThe mud generated during the drilling process can also be dewatered using a filter press.
3.Pharmaceutical industry: In the pharmaceutical industry, filter presses are mainly used for the separation of mother liquor and suspension produced in process processes such as extraction, concentration, and crystallization. For example, the residue and liquid medicine produced during the extraction of traditional Chinese medicine can be separated by a pressure machineIn antibiotic production, a press machine can also be used to separate the hyphae from the antibiotic crystals.
4.Food industry: In the food industry, the press machine is mainly used for solid-liquid separation in fruit and vegetable juice, soy products, condiments and other industries. For example, a pressing machine can be used to separate okara and soy milk in the production of soy productsIt is also possible to separate the fruit and vegetable pomace produced after fruit and vegetable juice is juiced.
5.Other fields: In addition to the above fields, the press machine is also widely used in environmental protection, metallurgy, ceramics and other industries. For example, in the environmental protection industry, industrial wastewater can be treated with a press machine;In the ceramics industry, ceramic slurry can be dewatered and made into ceramic ware.
Filter press