黑龙江石油化工厂催化裂化装置 ,由于原料掺渣油量的不断增加 ,原料油质量变差、油浆换热系统结焦日趋严重。自1 998年 8月起 ,向油浆换热系统连续注入 NS- 1 3阻垢剂 ,注入量为油浆量的 1 50 0μg/g。直至 1 999年 8月 ,连续运转一年 ,没有发现结焦现象 ,油浆换热系统压降没有 Heilongjiang Petrochemical Plant catalytic cracking unit, due to the continuous increase of raw materials mixed with residual oil, the quality of raw oil worse, increasingly serious coke slurry heat exchange system. Since August 1998, NS-1 3 scale inhibitor was continuously injected into the slurry heat exchange system, and the injection amount was 1 50 0 μg / g of oil slurry. Until August 1999, continuous operation for one year, did not find the phenomenon of coke, slurry pressure drop system does not