30results about How to "Reduce excess air ratio" patented technology

The invention discloses a stable and effective biomass pellet fuel combustion device and method. The stable and effective biomass pellet fuel combustion device comprises a combustion furnace shell, a primary air device, a secondary air device, an ignition device, a feed device, a burner, a heat exchange device, a stirring device and an ash tray. The stable and effective biomass pellet fuel combustion device and method are capable of guaranteeing the stable and effective combustion of the fuel and preventing slagging and caking in combustion so as to realize continuous stable combustion. The volatile component and fixed carbon in the biomass are burnt in two stages, the air quality is controlled, and the pollutant emission is lowered in combustion. The ignition device achieves low ignition energy consumption and low ignition pollutant emission; the combustion is safely isolated from stored materials; the stable and effective biomass pellet fuel combustion device and method have high energy conservation and emission reduction benefit and application value.

The invention discloses an energy-saving and emission-reduction transformation method for reducing the emission of nitrogen oxides from a DDF cement decomposition furnace. By setting a confluence box and a gooseneck for a DDF decomposition furnace with a small volume, the residence time of the flue gas is prolonged, and part of the coal The powder is distributed to the cone of the calciner, and part of the tertiary air is sent to the middle and upper part of the calciner. The enlarged DDF calciner volume and the lower part of the pulverized coal inlet position increase the burnout rate of the pulverized coal, and the excess air in the lower part of the calciner If the coefficient is less than 1.0, under the condition of insufficient oxygen, a large proportion of CO is produced, which becomes the reducing agent for reducing and eliminating nitrogen oxides. The ash return channel is set in the confluence box to send the settled raw material and coal powder particles back to the middle nozzle of the calciner, so as to solve the problem of ash accumulation and sintering blockage, improve the processing capacity of the calciner for coarse particles, and improve the production efficiency of the kiln. The decomposition rate of raw materials is improved, and the effective energy saving and emission reduction of the cement firing system are realized through the dual effects of reducing nitrogen oxide emissions and reducing heat consumption.