Closed weighing coal feeder is the main coal feeding equipment used in the coal feeding system of coal-fired power plants. Capable of achieving continuous and uniform coal feeding, accurately weighing and measuring during the coal feeding process, and automatically adjusting the coal feeding amount according to the boiler load needs to match the actual coal feeding amount with the boiler load.

When the closed weighing coal feeder is in operation, coal enters the coal feeder through the coal inlet gate from the coal storage bin, and the measuring conveyor belt actually reaches the coal outlet of the coal feeder. After passing through the coal outlet gate, it enters the lower level equipment. Under the measuring conveyor belt, a weighing roller with accurate size control is installed, forming the weighing measurement span, A measuring roller connected to a pair of high-precision weighing sensors is installed in the middle of the weighing measurement span.

The closed weighing coal feeder used in the coal feeding system of coal-fired power plants can improve boiler performance within a large range of load changes, with significant improvements being:

1. The use of hot and reheat temperature control is more stable;

2. Make pressure control more stable;

3. Reduce the amount of excess air required; Increase the amount of air required for fuel