Applications of filters and filter elements in power plants

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A power plant is a massive system that relies on a large number of filtration devices in its daily operations. Let’s take a look at the application of filters and filter elements in power plants. First, let’s introduce the core components of a power plant: the boiler, the steam turbine, and the generator. These components are expensive, costly to manufacture, and quite difficult to replace. From an environmental protection perspective, **zero emissions of pollutants from power plants are required; therefore, there are high demands on power plants in terms of pollutant treatment, which necessitates the use of numerous filtering products. I. Boiler System The boiler is the core component of a thermal power plant. There are three cycles in the boiler system: coal powder is burned and turns into ash, which is then discharged ； Water is turned into steam in the boiler and then sent to the turbine ； Air passes through the boiler and mixes with dust. 1. Boiler feedwater system: The water used in boilers is mainly surface water or seawater, which contains too many impurities to be used directly in the boiler. It must be filtered before it can be utilized in the boiler. For this purpose, filtration is necessary: first, T-type or Y-type filters are used for rough filtering to remove larger particles, then precision water filters are employed to eliminate the remaining impurities. Finally, water softening elements are used to remove chemical substances from the water, so that it can be introduced into the boiler system. 2. Coal conveying system: Coal unloading machines: In some thermal power plants, coal is transported by train; the advantages of this method are high transport capacity, large volume of coal that can be moved, and low costs. The power plant needs to install coal unloading machines to transfer the coal from the train cars to its own coal storage area. Conveyor bucket wheel: It is used to dig up the coal in the coal yard and transfer it onto the conveyor belt; it’s essentially like a large, rotatable excavator with long arms. Conveyor belt: It is responsible for transporting the coal (i.e., the conveyor belt itself). Coal grinder: Coal comes in lump form when it is transported; in order to ensure its complete combustion in the boiler, the coal lumps need to be ground into powder. In thermal power plants, coal grinders are large-scale devices that are installed indoors and operated by large motors. After passing through the coal grinder, the coal enters screening equipment, where larger lumps are recycled and ground again, while the fine powder is sent to the coal storage bin. Coal feeder: It is used to transport the powdered coal from the coal bin to the combustion chamber. The components mentioned above all belong to large-scale machinery that requires hydraulic systems for operation; this leads to the need for a large number of hydraulic oil filters and filter elements. Hydraulic oil filter elements are also one of our company’s main products, and we hold a clear advantage in this field. 3. Dust removal system: The main components used are filter cartridges and air filters. After fine filtration, the filtered air still contains sulfur dioxide, which is then released through chimneys. These chimneys contain large amounts of lime water, and when this lime water reacts with sulfur dioxide, calcium sulfate is formed and falls to the bottom of the tower, while carbon dioxide is released through the chimneys. II. Turbine System: Water is turned into steam in the boiler and then sent to the turbine. The main principle of how a turbine operates is that the steam from the boiler is used to drive the rotor, which in turn powers the generator to produce electricity. Filters used include hydraulic oil filters and lubricating oil filters. After being used by the turbine, the steam is cooled in a condenser and reverted to liquid form, returning to the water circulation system. This place also requires a water filter and filter elements. III. Generator system: Generates electricity by utilizing the theory of magnetic induction. Generators mainly use lubricating oil filters, and the precision requirements for these filters are quite high. These are some of the filters and filter elements that can be used in power plants. A power plant is a massive system, and for environmental protection reasons, it relies on a large number of filtration devices, including those for filtering oil, air, and water