脱硫塔防腐技术要点
Key points of anticorrosion technology for desulphurization tower
湿法烟气脱硫吸收塔、烟囱内筒防腐蚀资料的选择有必要思考以下几个方面:
It is necessary to think about the following aspects: the selection of anti-corrosion data of the absorber and chimney of the wet flue gas desulfurization (FGD) and chimney.
(1)满意杂乱化学条件环境下的防腐蚀请求:烟囱内化学环境杂乱，烟气含酸量很高，在内衬外表构成的凝聚物，关于大多数的建筑资料都具有很强的侵蚀性，所以对内衬资料请求具有抗强酸腐蚀才能;
(1) request with corrosion conditions: messy chemical chemical environment inside the chimney smoke messy, acid content is very high, which aggregates lined in appearance, most of the information on building has very strong erosion, so it has strong acid corrosion to the lining material request;
(2)耐温请求:烟气温差改变大，湿法脱硫后的烟气温度在40℃~80℃之间，在脱硫体系维修或不运转而机组运转工况下，烟囱内烟气温度在130℃~150℃之间，那么请求内衬具有抗温差改变才能，在温度改变频频的环境中不开裂并且耐久;
(2) high temperature flue gas temperature change request: large temperature of flue gas wet desulfurization between 40 DEG ~80 DEG, in desulfurization system operation and maintenance or no unit operation conditions of flue gas in chimney temperature between 130 DEG ~150 DEG, then the request changes to the liner has high temperature difference, temperature change in the environment frequently no cracking and durability;
(3)耐磨功能好:烟气中含有很多的粉尘，一起在腐蚀性的介质效果下，磨损的实际情况可能会较为显着，所以请求防腐资料具有杰出的耐磨性;
(3) wear-resisting function is good: flue gas contains a lot of dust, and the actual situation of wear will be more obvious when the corrosive medium is applied together, so the request for anticorrosive material has excellent wear resistance.