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Method for reducing salt-induced corrosions and scale formations at heating surfaces of convective step of combustion tank for garbage and biomaterials, by diverting flue gases to several injection-spraying steps and cooling the gases
Method for reducing salt-induced corrosions and scale formations at heating surfaces of convective step of combustion tank for garbage and biomaterials, by diverting flue gases to several injection-spraying steps and cooling the gases
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机译:通过将烟道气分流至几个喷射步骤并冷却烟气来减少盐分腐蚀和污物在燃烧罐对流步骤受热面的方法
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摘要
The method for reduction of salt-induced corrosions and of scale formations at the heating surfaces of the convective step of a combustion tank for garbage and biomaterials, comprises diverting flue gases to several injection-spraying steps and cooling the flue gases by nozzle spraying of water. The flue gases leave the furnace and contain solid components and gaseous salts. The cooling rate of the flue gas is 150-1500[deg]C per second, where a spontaneous nucleation is started by a condensation and desublimation of dissolved salts in the flue gas at the surfaces of the seed crystals. The method for reduction of salt-induced corrosions and of scale formations at the heating surfaces of the convective step of a combustion tank for garbage and biomaterials, comprises diverting flue gases to several injection-spraying steps and cooling the flue gases by nozzle spraying of water. The flue gases leave the furnace and contain solid components and gaseous salts. The cooling rate of the flue gas is 150-1500[deg]C per second, where a spontaneous nucleation is started by a condensation and desublimation of dissolved salts in the flue gas at the surfaces of the seed crystals. At a higher super saturation of the dissolved salts, a dwell time of 0.17-1.7 seconds is set between the nozzle spraying of water and the entry into the convective step. The layered primary particles are formed from the seed crystals in the dwelling path. An independent claim is included for a device for carrying out the method for reduction of salt-induced corrosions and of scale formations at the heating surfaces of the convective step of a combustion tank.
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