Description

The Quzhai 9MW Waste Heat Recovery Project is located at the Quzhai Cement Works factory near the city of Luquan in Hebei Province, China. The project utilizes waste heat from cement production lines, which would otherwise be released into the atmosphere, to generate electric power that is utilized on-site. The power produced by the project displaces power that was previously supplied by the North China Power Grid. The project increases energy efficiency and reduces the factory's reliance on exhaustible fossil fuel.

Technology

The waste heat recovery (WHR) captive power plant utilizes the low temperature waste heat of the exit gases from the Suspension Preheater (SP) and Air Quenching Chamber (AQC) in cement production. The project utilizes WHR boilers (SP boiler and AQC boiler), steam turbine generators, controlling system, a water-circulation system and a dust-removal system. The steam from SP boiler and AQC boiler are fed to the steam turbine generator to produce power. The operation, control, monitoring and data logging for the system are created by one DCS system. The project's annual power generation is 58,500MWh. After deduction of auxiliary power consumption, the calculated net annual supply to the Quzhai Cement Works is 53,820MWh. The project displaces an equivalent amount of annual power currently drawn from the grid, leading to annual emission reductions of approximately 52,878 tCO2 equivalent.

Location

The project is located on site at the Quzhai Cement Works Co., Ltd. The factory is fifteen kilometers west of Shijiazhuang, the capital city of Hebei Province and five kilometers north of the city of Luquan.