Washing powder production waste heat recovery and utilization technology and apparatus

The invention discloses a washing powder production waste heat recovery and utilization technology and apparatus. The waste heat recovery and utilization technology comprises the following steps: 1) a washing powder slurry for producing base power passes through a high pressure pump for being pressurized, and then enters a spray tower; 2) hot air from a hot-blast stove is absorbed into the spray tower by a tail gas blower fan, and the hot air dries the slurry which is sprayed downwards from the spray tower and atomized by the spray tower, so that the base powder of the washing powder is formed; after the base power is dried, and the hot air tail gas is extracted from the tower top, and after dedusting, the hot air tail gas passes through a waste heat recovery exchanger and is discharged to the atmosphere; 3) tube side air which passes through the heat exchanger is heated by waste heat of the tail gas which passes through the heat exchanger, and the heated air passes through an insulated air pipeline and is blown into the hot-blast stove by a combustion-supporting blower fan. According to the invention, the power consumption of the tail gas blower fan and the fire coal combustion-supporting blower fan is not increased, and the hot-blast stove combustion-supporting air is heated by waste heat of the spray tower tail gas, and the temperature of the hot-blast stove combustion-supporting air rises from 40 to 50 DEG C., thereby reducing consumption of fuel without changing total heat of the hot-blast stove.