Introduction of WHR System in Cement Plant

The waste heat power generation system installed at the cement production line mainly utilizes the waste heat resources of the grate cooler and preheater of the clinker production line to build a pure low-temperature waste heat recovery power plant. It is mainly composed of a steam turbine & generator unit and its auxiliary equipment, PH boiler, AQC boiler, cooling tower, demineralized water treatment plant, etc. Combined with the characteristics of waste heat resources and the purpose of "determining electricity by waste heat resources", aiming at the characteristics of high fluctuation of waste heat temperature and flow of the new dry process cement kiln system, Conch Kawasaki has studied and developed the pure low-temperature and low-pressure flash thermal system technology. The process flow of the whole thermal system is a complete process of water vapor recycling. Waste heat recovery boilers are respectively set at the grate cooler side and preheater side of the clinker production line for heat exchange. The superheated steam generated after heat exchange is led into the steam turbine for work done, and the steam turbine drives the generator to generate electricity.

Technology Features

1. Conch Kawasaki is the pioneer of the waste heat recovery power plant in the cement industry in China who has rich industry experience and has conducted in-depth research on the characteristics of different industrial waste gas resources. Relying on the technical support of Kawasaki Heavy Industries, Ltd., Conch Kawasaki can develop a proprietary high-efficiency thermal system and waste heat recovery boiler for different waste gas resources to ensure the organic combination of power generation system and clinker production line system. It can realize the utilization of waste heat truly on the premise of not increasing the coal consumption of the clinker production line system.

2. Conch Kawasaki has a highly skilled technical team with strong design ability. The company uses internationally advanced design software to ensure the system safety, beautiful layout, high efficiency, and accuracy of the drawing. Also, our design can meet the requirements of the National Standard of P.R. China, American Standard, Japanese standard, and other design specifications according to the needs of the project. At present, Conch Kawasaki's reference projects cover more than ten countries such as China, Japan, Thailand, and Laos.

3. Conch Kawasaki’s WHR system has high reliability and good stability. The intelligent distributed control system developed by Conch Kawasaki has stable and reliable operations, high labor productivity, high automation, and high intelligence. It effectively reduces the labor intensity of the factory and improves the operation reliability of the WHR system.

Up to now, Conch Kawasaki has contracted more than 250 sets of WHR plants, involving hundreds of clinker production lines in China and overseas. The market covers many provinces, cities, and autonomous regions in China, Thailand, Myanmar, Japan, and other countries, with a total installed capacity of 3022 MW. The annual power generation is expected to be 22.97 billion kWh, which will reduce 21.2 million tons of carbon dioxide and save 8.27 million tons of standard coal per year. The contribution to environmental protection and economic benefits is significant.