How to judge the filtering effect of high-temperature filter bags?

High-temperature filter bags are a kind of filtering equipment that is used more frequently in industrial production. It is mainly used in the fields of steel, chemical industry, electronics, metallurgy and cement. The filtering effect is directly related to the normal operation of production and the stability of product quality. However, how to judge the filtering effect of high-temperature filter bags is a relatively complicated issue. The following will analyze and discuss this.

Filtration principle of high-temperature filter bags

High-temperature filter bags remove impurities and dust particles in the gas through the principle of physical filtration. After passing through the high-temperature equipment, the gas will enter the interior of the high-temperature filter bag. Outside the filter bag of the high-temperature filter bag, the dust and fine particles in the air are electrostatically adsorbed and left on the surface of the filter bag. The inside of the filter bag with loose fiber tissue allows clean air to pass through.

Filtration performance of high-temperature filter bags

The filtering performance of high-temperature filter bags directly affects the use effect of the filter bags. Generally speaking, we can evaluate the filtering effect of high-temperature filter bags from the following aspects:

1. Capture rate of filter bags. The capture rate of filter bags refers to the effective filtration of particles of what diameter the high-temperature filter bag can effectively filter. Generally speaking, the higher the capture rate of the high-temperature filter bag, the better the effect of removing particles in the air.

2. Flux of the filter bag. The flux of the high-temperature filter bag is also called the filtration rate, which refers to the volume of gas that can be processed in the filter bag per unit time. The flux is usually expressed in m³/h. The larger the flux, the better the filtering effect of the filter bag.

3. Filtration efficiency of the filter bag. The filtration efficiency of the filter bag refers to the percentage of particles in the air that the high-temperature filter bag can remove. Generally speaking, the higher the filtration efficiency, the better the filtration effect of the filter bag.

4. Heat resistance. Since the high-temperature filter bag is often washed by the high-temperature purified airflow during use, the heat resistance of the filter bag is very important. Excellent high-temperature filter bags should be able to withstand severe high-temperature loads without deformation or aging.

5. Service life of the filter bag. The service life of the high-temperature filter bag is also one of the important indicators for judging its effectiveness. If the service life of the high-temperature filter bag is relatively short, it may affect the use and filtration effect of the filter bag.

How to judge the filtering effect of high-temperature filter bags

The filtering effect of high-temperature filter bags is closely related to their performance indicators. The specific methods are as follows:

1. Test the filtering efficiency. The particle capture efficiency of high-temperature filter bags can be determined by laboratory testing methods. In the experiment, standard particles can be used to determine the filtering effect of filter bags. The usual practice is to spread the high-proportion ash powder on the surface of the filter bag, and then calculate its dust capture efficiency by analyzing the mass of the ash powder after the surface of the filter bag is cleaned.

2. Detect the flux. By measuring the flux of the high-temperature filter bag, it can be indirectly evaluated whether its filtration rate is normal. If the flux of the filter bag is relatively high, it means that its filtering effect is better.

3. Test the capture rate of the filter bag. Standard particles can be used in the laboratory for testing to determine the maximum particle diameter of the high-temperature filter bag.

4. Test the heat resistance of the high-temperature filter bag. Heat resistance experiments can be carried out to increase the high temperature and test the heat resistance time or heat resistance temperature.

5. Evaluate the life of the filter bag. Evaluating the life of high-temperature filter bags is also one of the methods to judge their effectiveness. It can be tested by accelerated aging methods in the laboratory. Under the control of small and medium sample costs, high-temperature filter bags are replaced regularly to observe changes in their life and capture effect.

In short, the filtering effect of high-temperature filter bags is closely related to the performance indicators of the filter bags. The filtering effect of high-temperature filter bags can be evaluated and tested by laboratory testing of indicators such as particle capture efficiency, filter bag flux, capture rate, heat resistance and filter bag life. These methods can provide guarantees for industrial production, ensure the normal operation of high-temperature filter bags and the stability of product quality, and thus provide a basic guarantee for the sustainable development of enterprises.