50results about How to "Reduce combustible content" patented technology

The invention discloses a compound multifunctional DC burner, containing in turn performance adjusting wind spout III, secondary wind spout, coal powder horizontal shade primary wind spout, performance adjusting wind spout II, coal powder horizontal shade primary wind spout, and secondary wind spout, there is a performance adjusting wind spout I on the against-fire side of the primary wind spout, the axes of the primary wind spout and performance adjusting wind spout III drift off that of the secondary wind spout and lean to the facing-fire side, and the performance adjusting wind spout II folds toward water-cooled wall from parts of the runners of the secondary wind spout. It has advantages of wide coal applied range, preventing water-cooled wall from clogging (coking), high-temperature corrosion resistance, low load stable combustion, low-nitrogen oxide discharge, self-adjusting performance, etc.

The combustion device is composed of a fly ash collector, a return controller, a pneumatic conveying injector and a combustion furnace. The upper part of the combustion furnace is connected to the inlet of the fly ash collector. The device makes it sent to the dense-phase area of ​​the combustion furnace through the bottom feeding nozzle installed in the combustion furnace. The return controller includes a shell, a bed body and an air chamber in the shell, an air distribution plate in between, and an inlet in the air chamber. Air outlet, there are standpipes and lower ash pipes on the bed body, the standpipes extend into the shell, there are air holes on the air distribution plate, there are guide hoods on the air holes of the air distribution plate in the area below the standpipe, and there are guide hoods on the guide hood. The air hole and the guide air hole are composed of interlinked axial and radial air outlet holes. The radial air outlet faces the discharge side, and the air hole of the air distribution plate in the lower area of ​​the discharge side is provided with a wind cap. Air inlet hole, the air inlet hole is composed of intercommunicating axial holes and radial holes, there is an air chamber partition at the boundary between the guide air cap and the air cap, and an air inlet is arranged on the two air chambers separated.

The invention discloses a W-shaped flame boiler with two stages of burn-out wind, which relates to the W-shaped flame boiler and aims at the problems that the W-shaped flame boiler of the prior single-stage burn-out wind device has high content of fly ash inflammable matters and low burn-off rate of coal dust. The W-shaped flame boiler comprises a superior OFA nozzle (2) and an inferior OFA nozzle (4) which is arranged on a furnace arch (5) close to an hearth throat inlet, is communicated with a lower hearth (6), is arranged on the outer side of a burner (8), and is communicated with a secondary wind box (11). The W-shaped flame boiler not only can replenish air for the unburned coal dust in time to benefit the burnout of the coal dust and greatly reduce the content of the fly ash inflammable matters, but also can better achieve the fractional combustion of the coal dust and greatly reduce the emission of NOx.

Disclosed is a secondary air offset whirl pulverized coal burner for a W flame boiler. The problems of high NOx discharge amount, high fly ash combustible matter content, slag-bonding to water walls of front and back walls of a lower combustion chamber and high temperature corrosion of the W flame boiler which is provided with an existing whirl pulverized coal burner on an arch are solved. A circular ring inner secondary air stop block in the circumferential direction is added in inner secondary air on a dividing cylinder of primary air and inner secondary air of the whirl pulverized coal burner; the angle of the circular ring inner secondary air stop block in the circumferential direction is 180 degrees; a circular ring outer secondary air stop block in the circumferential direction is added in outer secondary air on a dividing cylinder of the inner secondary air and the outer secondary air; the angle of the circular ring outer secondary air stop block in the circumferential direction is 180 degrees; the boundary line in the diameter direction of the circular ring inner secondary air stop block and the circular ring outer secondary air stop block is parallel to the front and back walls of the boiler; the circular ring inner secondary air stop block and the circular ring outer secondary air stop block are mounted on one side close to the center of a combustion chamber. The secondary air offset whirl pulverized coal burner is used for the W flame boiler.