Glossary STEAG Entsorgungs GmbH Aluminate silicatesChemical compounds in which, compared to silicon dioxide (sand), some of the silicon (Si) atoms hane been replaced by aluminum (Al) atoms. AmorphousAmorphous materials are solid, but - unlike in crystalline structures - their molecules are randomly distributed like in a liquid. Boiler typesThree types of boilers/furnaces are used in power plants: Grate stoker boilers, fluidized bed boilers, and pulverized coal boilers. Most modern coal-fired power plants today are using pulverized coal boilers. In these boilers, pulverized coal is blown into the furnace for burning. Depending on the burning temperatures, pulverized coal boilers can be further subdivided into slag tap (wet bottom) boilers with lower temperatures and dry bottom boilers with higher temperatures. Electrostatic precipitatorIn an electrostatic precipitator, fly ash particles carried by the flue gas stream are separarated from the gas by an electric field. The main parts of such a device are discharge electrodes and collection plates or tubes, between which a direct voltage is applied. The electrons emitted by the discharge electrodes partially combine with the fly ash particles, so that the particles are attracted by the positively charged collection plates or tubes. The collected particles can be removed from the collectors by mechanical vibrations. They fall into funnel bags below the precipitator. Electrostatic precipitators in coal-fired power-plants normally consist of a series of several cleaning stages. GranulesThe solid particles created by the rapid cooling of a liquid melt in a water quench are called granules. The process is called granulation. MeltLiquid phase of a material. Most solids melt at high temperatures. SinteringThe beginning of melting, where only the surface of solid particles turns liquid. In this phase, the particles can easily stick together, forming sintered, porous materials when cooled down.
Aluminate silicatesChemical compounds in which, compared to silicon dioxide (sand), some of the silicon (Si) atoms hane been replaced by aluminum (Al) atoms.
AmorphousAmorphous materials are solid, but - unlike in crystalline structures - their molecules are randomly distributed like in a liquid.
Boiler typesThree types of boilers/furnaces are used in power plants: Grate stoker boilers, fluidized bed boilers, and pulverized coal boilers. Most modern coal-fired power plants today are using pulverized coal boilers. In these boilers, pulverized coal is blown into the furnace for burning. Depending on the burning temperatures, pulverized coal boilers can be further subdivided into slag tap (wet bottom) boilers with lower temperatures and dry bottom boilers with higher temperatures.
Electrostatic precipitatorIn an electrostatic precipitator, fly ash particles carried by the flue gas stream are separarated from the gas by an electric field. The main parts of such a device are discharge electrodes and collection plates or tubes, between which a direct voltage is applied. The electrons emitted by the discharge electrodes partially combine with the fly ash particles, so that the particles are attracted by the positively charged collection plates or tubes. The collected particles can be removed from the collectors by mechanical vibrations. They fall into funnel bags below the precipitator. Electrostatic precipitators in coal-fired power-plants normally consist of a series of several cleaning stages.
GranulesThe solid particles created by the rapid cooling of a liquid melt in a water quench are called granules. The process is called granulation.
MeltLiquid phase of a material. Most solids melt at high temperatures. SinteringThe beginning of melting, where only the surface of solid particles turns liquid. In this phase, the particles can easily stick together, forming sintered, porous materials when cooled down.