Abstract: 　A 400 t/d incineration project was taken as an example, the operation economic characteristics of wet deacidification of waste incineration under different technology systems were comprehensively analyzed. The results showed that for the project with low inlet pollutant concentration, the operating cost of the de-whitening condition was much higher than that of the non de-whitening condition. The electricity cost of the circulating pumps was the main operating cost of wet deacidification process, which was up to 77%. Reducing power consumption was the key to reduce operating cost. The outlet temperature of the wet tower had a significant impact on the operating cost. For every 1 ℃ decreased in outlet temperature, the operating cost increased by approximately 0.2-0.4 yuan per ton of waste. When the price of water was higher than 8 yuan per ton, the operation economy of the de-whitening condition would be better than that of the non de-whitening condition with the appropriate outlet temperature of the wet tower. With the increase of the concentration of inlet pollutants, the operating costs of wet deacidification increased linearly, and the cost of alkaline solution accounted for about 73% of the total costs. A combination of semi dry and wet processes could improve economic efficiency.

Key words: waste incineration, wet deacidification, operation cost, de-whitening condition