₂₂kara hadawa da oxygen don samar da haka₃, Fe₂O₃da v₂O₅a karkashin yanayin wuce haddi. (Flue Gas da mai zafi ƙasa farfajiya dauke da wannan bangaren).

Kusan 1 ~ 3% na duka haka₂an canza shi don haka₃. Haka₃₃zai hada da tururi mai tururi don samar da tururi mai sulfuric acid.

SO₃₂O ---₂SO₄

At the same time, the sulfuric acid liquid condensed on the low-temperature heating surface will also adhere to the dust in the flue gas to form sticky ash that is not easy to remove. The flue gas channel is blocked or even blocked, and the resistance is increased, so as to increase the power consumption of induced draft fan. Corrosion and ash blockage will endanger the working condition of boiler heating surface. Tunda gas mai lalacewa ya ƙunshi duka haka₃da tururi na ruwa, za su samar da H₂SO₄Vapor, wanda ya haifar da karuwar dew na acid dew na flue gas. A lokacin da zazzabi mai gas yayi ƙasa da zafin ruwan acid na acid na mai gas, h₂SO₄₂SO₄bayani. Further corrodes the equipment, resulting in heat exchanger leakage and flue damage.

In the supporting devices of the heating furnace or boiler, the energy consumption of the flue and heat exchanger accounts for about 50% of the total energy consumption of the device. Ruwan madara mai shayarwa yana shafar ingancin yanayin zafi na shinge da filayen wuta. Mafi girman zafin jiki zazzabi, ƙananan ingancin zafin jiki. Ga kowane karuwar 10 ° C karuwa a zazzabi gas mai shayarwa, ingancin zafin jiki zai rage da kusan 1%. If the exhaust gas temperature is lower than the acid dew point temperature of the flue gas, it will cause equipment corrosion and cause safety hazards to the operation of heating furnaces and boilers.