Equipment conditions: a production of vitamin chemical enterprises in the production process to produce a large number of industrial waste, how to deal with industrial waste has been plagued by operators who finally chose the spot incineration, incineration process is used to generate heat to cast 0.6MPa saturated steam. The incinerator is to be designed on the basis of DZL2-1.0-WⅡ type furnace on manufacturing, with fuel combustion system to 0 # diesel fuel ignition at 200 # residuum-based fuel combustion, combustion is stabilized continue . Their conditions particularity as follows: 1) The incinerator fuel for the company's waste, complex composition, volatile, sometimes stronger alkaline, sometimes stronger acidity; 2) flue gas containing a large amount of salts and Dust can easily cause severe ash blocking phenomenon, affecting work, frequently cleaning every day within the drum tobacco pipe manual mechanical cleaning. 3) Gas Temperature 270 ℃ ~ 320 ℃, an average of 290 ℃. Such a high temperature, and other exhaust fans lead the one hand the non-work facilities, easily damaged, on the other hand wasted energy. The original company were using a conventional air preheater and economizer waste heat recovery smoke, they are due to ash blocking, when suddenly an acidic and alkali and suddenly and failed. Heat recovery pathway and effect: Then use our RHG-L / V-type flue gas heat recovery system, the recovery of waste heat heating water softener, to achieve the following objectives: 1) flue gas temperature: flue gas temperature decreased from 290 ℃ to 160 ℃. In the recovery of waste heat at the same time, to extend the life of induced draft fan; 2) when suddenly acidic, alkali corrosion when suddenly overcome: the contact portion of the flue gas are at a certain temperature or higher, ensure no precipitation corrosion; 3) gray block overcome: a unique design, the smoke pipe of ash, while the way to open the door ash, simple and practical; 4) heat recovery: heat recovery 15 × 104kcal / h; 5) Life: more than four years have been normal running; 6) Payback period: According to user statistics, cost recovery within six months.