Cement is a key area of energy saving and carbon reduction. The implementation of energy-saving and carbon reduction technology transformation in enterprises can not only reduce production costs and enhance the competitiveness of enterprises, but also respond to the national call for energy saving and carbon reduction to achieve green development. As the largest thermal system in the cement plant, the
clinker burning process accounts for nearly 100% of the fuel required by the whole plant, 20% ~ 30% of the electricity consumption, and 100% of the high-temperature waste gas, which can be said to be the core of energy saving and consumption reduction in the whole plant.
"The thermal intensity of the rotary kiln is not enough, the firing temperature is not high enough, the firepower is not concentrated, and the energy-saving effect will be reduced a lot." Qi Yanyong, associate professor of Southwest University of Science and Technology, said. Recently, around the topic of energy-saving transformation of cement enterprises in the firing system, China Cement Network and Qi Yanyong conducted in-depth exchanges. & nbsp; & nbsp;
In recent years, cement enterprises have been exploring the road of energy saving and consumption reduction, and innovative technologies have sprung up like mushrooms. The firing technology of the whole industry has also made remarkable progress compared with five years ago. Qi Yanyong said that at present, the energy-saving transformation of the firing system in cement enterprises has great potential, and there is still much room for the application of technologies such as the identification, automation and intellectualization of the combustion state of rotary kilns. & nbsp; & nbsp;
Recently, China Cement Network visited Dongfang Hope Chongqing Cement to get a close understanding of its preheater "5 to 6" project. In recent years, with the in-depth research of preheater technology, the industry has gradually realized that 6-stage preheater has great advantages in reducing production energy consumption, but the transformation of preheater is difficult and risky. Dongfang Hope Cement dares to try to change 5-stage preheater to 6-stage preheater, which sets an example for the industry. & nbsp; & nbsp; & nbsp; "The success of Chongqing Dongfang Hope Cement Preheater" 5 to 6 "project means that the" 5 to 6 "project has been widely promoted in cement enterprises. Qi Yanyong told China Cement Network.
In the cement industry, except for individual cement enterprises built in recent years, most of the 5000 t/d production lines are 5-stage preheaters. Qi Yanyong said that in the five-stage preheater, many cement plants can not use up the waste heat of the first-stage cylinder at all, and after waste heat power generation, the waste heat can not be fully utilized. However , if the 6-stage preheater is used, more heat will be recovered from the kiln, and the remaining heat can just meet the drying of the raw material process, which is of great significance for energy saving and emission reduction.
At the same time, Qi Yanyong also believes that the 6-stage preheater will be the end point of the kiln system in most areas, because if it is increased to 7-stage, the energy of the next process will not be enough.
In addition, what are the specific ways to reduce coal consumption in the burning system of cement enterprises? What is the specific operation idea? On July 6-7, 2023, China Cement Network will hold the " 2023 China Cement Energy Conservation and New Energy Development Conference " in Chongqing. At that time, Qi Yanyong, an associate professor of Southwest University of Science and Technology, will give a brilliant speech on the theme of "Ways and Operational Ideas to Reduce Coal Consumption in Firing System". Welcome to sign up!
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