Filter hose: materials and application features

Filter hose belongs to the category of equipment of universal type, used for air purification, the temperature of which does not exceed 260 degrees. It is an effective dust collector and is made, as a rule, to order taking into account the operation features and sizes of replacement elements. The structure can be ellipse or round in shape and equipped with a ring made of rubber, spring and wire.

Filter hose: scope

There are many technological processes that require the use of such elements:

• Refining of oil and production of metallurgical products;
• Sawing and other types of wood processing;
• Ventilation of cement silo;
• Manufacturing of cement;
• Grinding and metal processing;
• Tobacco production;
• Production of carbon black and plastics.

Materials

As materials for the manufacture of hoses, polyester, fabric, polypropylene, fiberglass are used. There are products supplemented with electrically conductive fibers, antistatic coating, and also designed for high temperatures and having water repellent characteristics. The outer layer can have a mesh or nylon fleece coating. Sleeves having a calendered surface acquired a sufficient distribution. Due to their use, the fine fibers are prevented from falling into the filtrate. The process of calendering the fabric consists in rolling through the rolls heated to a certain temperature, and then sintering the fibers.

Features of operation

The replaceable part of the filter is subject to constant wear and high loads, which necessitates regular replacement. In addition to the removal of old elements, timely cleaning of bag filters, branch pipes and bunkers from accumulated contaminants and subsequent system checks is required. The required level of efficiency of aspirating structures is achieved only if the new hoses are systematically installed.

There are several basic types that differ in the specifics of operation. A filter sleeve, used in a high-temperature environment and for trapping explosive dust, has acquired enough distribution. The basis of the construction is a body having two chambers, valve sections and frame filtration elements. The air enters the chamber through the branch pipe and passes through a filter, on the surface of which remains dust. After cleaning, the air is discharged into the special chamber through the open hose elements.

Manufacturing

The production process is carried out on the newest equipment with the use of high-quality cloths, including materials that differ in conductive properties. A filter hose, designed to catch dust with increased explosiveness, is supplemented by valves with a special membrane. In this case, a separate installation of the starting equipment is required in the allocated room. The removal of collected dust can be carried out with varying regularity depending on the operating conditions. With the help of sluice gates, the unloading department is sealed when it is necessary to collect dust on the installed filter. Other types of sealing devices are also used.

Certain types of filters are supplemented with automatic systems that allow controlling the mechanisms for unloading dust from several filters simultaneously and preventing damage to the structure as a result of exposure to high-temperature gases. Such systems are used to transfer data for the subsequent monitoring and control of the cleaning mechanism.