Providing of technological norm on oxides of sulphur for steam boilersat thermal power stations

Abstract

Thermal power plants (TPPs) burn more than 30% of the produced fuel. Also this fuel is worst in quality. This is usually either high-ash or high-moisture, often high-sulfur coal, or waste from oil refining and associated petroleum gas. If the main fuel at the plant is natural gas, then fuel oil farms are still being built to create a fuel reserve. But even if a gas-oil plant uses only a small part of fuel oil in its fuel balance, the permissible environmental impact is calculated on the maximum use of the dirtiest fuel, i.e. fuel oil. Thus, thermal power plants are either active or potential sources of nitrogen oxide emissions. PURPOSE. Development of methods for decreasing sulfur emissions without installing special desulphurization equipment in the exhaust gas path. In some cases, this is possible if the absorption capacity of the alkaline components of solid fuel ash or the dosing of slaked lime into fuel oil is used to control the permissible emission of solid particles in the absence of ash collectors on gas-and-oil boilers. The developed METHODOLOGY will allow us to trace the entire chain of necessary actions based on the fuel composition before selecting the main parameters of the proposed methods. RESULTS. The formulas for calculating the required degree of purification of combustion products are proposed. Methods decrease sulfur oxides emissions in domestic equipment using for pulverized coal boilers. Solution allows to decrease oxide emissions for boilers that burn fuel oil and do not have ash traps.