Background This scheme is made by
Beijing Dorland System Control Technology Co., Ltd. to undertake the PTW electronic system project of Wanhua Chemical (Ningbo) Co., LTD., and has been successfully implemented. In 2017, the total number of PTW work orders for gas generating units reached 17,000, and there were as many as 50 construction units for gas generating units, and nearly 77% of the special work was focused on fire, height and electricity, which also caused a series of problems: PTW electronic system will solve these problems, such as secondary fire operation before the gas detection, type of blank、alter, inadequate risk identification, not enough homework ticket closed and not timely.