WANGXu,RENXiao-fen,LIGuang-huan,et al.Application of Absorption Heat Pump in Sludge Low?temperature Drying Process[J].China Water & Wastewater,2023,39(8):133-139.
Application of Absorption Heat Pump in Sludge Low?temperature Drying Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第8期
Page:
133-139
Column:
Date of publication:
2023-04-17
- Keywords:
- absorption heat pump; sludge; low-temperature drying
- Abstract:
- The application of absorption heat pump (AHP) in a 100 t/d sludge low-temperature drying project is introduced. The heat balance model of the system is discussed, the energy distribution of each link of the operating process is calculated, and the system’s performance and economy are compared and analyzed combining the system theory and process operation. The results show that the specific water extraction rate of the system can remove up to 10.9 kg water for every 1 kg standard coal consumption, which is 1.23 times and 1.44 times of the traditional steam disc drying technology and steam-assisted hot airbanddrying technology. The standard coal consumption and CO2 emissions are 18.6% and 30.5% respectively lower than the two conventional steam sludge drying technologies, which shows significant environmental benefits. It also shows significant economic benefits that the unit sludge treatment cost after the implementation of the project is 153.3 yuan/t, which is 21.7% and 31.3% lower than the two conventional steam sludge drying technologies,and the sludge weight reduction rate can reach 77.34%, which saves 26.3% of processing cost. The implementation and operation of this project can provide reference for the design and construction of large sludge drying projects that can provide low-cost steam (coal-fired power plants or waste-to-energy plants).
Last Update:
2023-04-17