Abstract: A heat exchange flue, having a top flue gas chamber (1), a bottom flue gas chamber (10) and a heat exchange section (H) located therebetween. The heat exchange section (H) comprises a heat exchange tube bundle (4) located in the middle, and a left side flue (5) and a right side flue (12) which are located at two sides of the heat exchange tube bundle (4). The axis of the heat exchange tube bundle (4) is positioned in a vertical plane extending substantially forward and backward, allowing the flue gas to laterally flush against the surfaces of heat exchange tubes. The left and right side flues (5, 12) are in a vertical box shape, the flues are each provided with a plurality of flue gas dampers (3) which are vertically arranged at intervals in a substantially horizontal alignment. Each of the flue gas dampers (3) is provided with a flue gas damper frame (13) for defining a flue gas port (2) and a flue gas port opening/closing device capable of selectively opening and closing the flue gas port (2).

Abstract: A convective heat transfer flue, including a flue wall (1) and convective heating surface groups (2) arranged inside the flue wall (1), shutters adjustable through 90 degrees or sliding gates (9) are arranged between adjacent convective heating surface groups and at a flue gas inlet and a flue gas outlet of the convective heat transfer flue. The proposed flue solves the problems of fouling within back-flow vortex regions of heat transfer pipes, and condensation on heating surfaces in the tail of the flue wall (1), as well as being beneficial for boiler start-up and load adjustment thereof.

Abstract: A convective heat transfer flue, including a flue wall (1) and convective heating surface groups (2) arranged inside the flue wall (1), shutters adjustable through 90 degrees or sliding gates (9) are arranged between adjacent convective heating surface groups and at a flue gas inlet and a flue gas outlet of the convective heat transfer flue. The proposed flue solves the problems of fouling within back-flow vortex regions of heat transfer pipes, and condensation on heating surfaces in the tail of the flue wall (1), as well as being beneficial for boiler start-up and load adjustment thereof.

Abstract: A stoker grate for circulating a combustible material includes a stationary grate sheet support and a moveable grate sheet support fitting with prop rolls on the stationary grate sheet support. The moveable grate sheet support includes a pair of moveable grate sheet supports opposed to each other and another pair of arc-shaped moveable grate sheet supports opposed to each other to form a long annular-shaped assembled support, stationary grate sheets fitting with mounting transverse beams of the stationary grate sheet support, moveable grate sheets fitting with mounting transverse beams of the moveable grate sheet support, the moveable grate sheets and the stationary grate sheets being disposed alternatingly, and a transmission unit. The driving moveable grate sheet support is hinged to the adjacent driven moveable grate sheet support and the driven moveable grate sheet supports are hinged to each other.

Abstract: A stoker grate for circulating a combustible material includes a stationary grate sheet support and a moveable grate sheet support fitting with prop rolls on the stationary grate sheet support. The moveable grate sheet support includes a pair of moveable grate sheet supports opposed to each other and another pair of arc-shaped moveable grate sheet supports opposed to each other to form a long annular-shaped assembled support, stationary grate sheets fitting with mounting transverse beams of the stationary grate sheet support, moveable grate sheets fitting with mounting transverse beams of the moveable grate sheet support, the moveable grate sheets and the stationary grate sheets being disposed alternatingly, and a transmission unit. The driving moveable grate sheet support is hinged to the adjacent driven moveable grate sheet support and the driven moveable grate sheet supports are hinged to each other.

Abstract: The invention relates to a stoker grates for circulating burning-up, wherein the existing reciprocal-type or chain-type grates are designed to be a long annular-shape with front and rear ends closed, resulting in burning-up of coal and thus overcoming the following defects of the existing coal-firing stokers: the coal remains on the grate shortly and can not be completely burn up, causing a waste of coal and low combustion efficiency.