Dynamic precipitator is used in ceramic industries.

Explanation:
Ceramic industries involve the production of ceramics, which are non-metallic solid materials that are typically made from clay and other raw materials. These industries often generate dust and other particulate matter during various processes such as grinding, crushing, milling, and drying. To control the emission of these particulates and ensure the production area remains clean, various air pollution control devices are employed.

One such device used in ceramic industries is the dynamic precipitator. Here is a detailed explanation of its working principle and advantages:

Working principle:
1. The dynamic precipitator is an electrostatic air cleaner that removes particles from the gas stream using the principle of electrostatic precipitation.
2. The gas stream containing particulates is passed through an ionization section, where corona discharge electrodes emit electrons that ionize the gas molecules.
3. The ionized gas molecules create a cloud of charged ions and electrons, which then interact with the particles in the gas stream.
4. The charged particles are attracted to oppositely charged collection electrodes, while the clean gas passes through.
5. The collected particles form a layer on the collection electrodes, and periodic rapping or shaking removes them, allowing continuous operation.

Advantages of dynamic precipitator:
1. High collection efficiency: Dynamic precipitators are highly efficient in removing particulates, even those with very small particle sizes.
2. Low pressure drop: These devices have a relatively low pressure drop, resulting in minimal energy consumption.
3. Continuous operation: The periodic rapping or shaking of collection electrodes allows continuous operation without frequent shutdowns for cleaning.
4. Versatile applications: Dynamic precipitators can handle a wide range of gas volumes and particulate concentrations, making them suitable for various ceramic industry processes.
5. Cost-effective: These devices offer long service life and require minimal maintenance, making them cost-effective solutions for air pollution control in ceramic industries.

In conclusion, the dynamic precipitator is used in ceramic industries to control particulate emissions and maintain a clean working environment. Its efficient particle collection, low pressure drop, continuous operation, and versatility make it a preferred choice for air pollution control in this industry.