LI Biao,ZHOU Xin,GAO Bo,et al.Design of Sludge Drying Incineration Treatment Process in Shunyi District[J].China Water & Wastewater,2021,37(14 14):63-68.
Design of Sludge Drying Incineration Treatment Process in Shunyi District
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
14 14
Page:
63-68
Column:
Date of publication:
2021-07-17
- Keywords:
- municipal sludge; thermal drying; incineration
- Abstract:
- Municipal sludge in Shunyi District, Beijing City is not suitable for mixed landfill, land improvement, landscaping and agricultural use, and its calorific value is low, so auxiliary fuel should be added in incineration treatment. The treatment capacity of Shunyi District sludge treatment project (phase Ⅰ) is 400 t/d, and the process is thermal drying and incineration. There are five hollow blade dryers with treatment capacity of 100 t/d and two fluidized bed boilers with treatment capacity of 135 t/d. The flue gas purification system consists of SNCR, semi-dry deacidification tower, activated carbon adsorption, bag filter, wet deacidification tower, wet electrostatic precipitator and anti-white smoke device, and the exhaust is required to meet Standard for Pollution Control on the Municipal Solid Waste Incineration (GB 18485-2014). The trial operational results of the project showed that the main flue gas emission data could meet the discharge requirements. Meanwhile, it also reflected several problems that similar projects should pay attention to in the design stage: equipments which were easy to produce odor were arranged centrally and the suction outlet was fully set to achieve the purpose of effective odor control; the smoothness of semi-dry sludge conveying system was properly maintained by increasing parameters of transportation equipment, shortening the transportation distance and controlling sludge water content; if the conditions permitted, boiler room should be selected as far as possible to supplement the heat source of steam, so as to save operational cost. It was estimated that natural gas consumption was the main factor affecting the operational cost.
Last Update:
2021-07-19