Abstract: Provided is a lancing device in which two guide rails and washing robots are installed in both directions of a hand hole, and each washing robot removes precipitates from the center of a steam generator, and therefore precipitates do not flow backwards, thereby completely removing precipitates.

Abstract: An integral water-cooled, air permeated, vibrating grate system for combusting biomass and other fuels in a boiler includes a grate top surface having air-flow apertures extending therethrough. The grate top surface is supported by a plurality of water-cooling pipes which arc coupled to a water supply. An enclosed air plenum unit is positioned under and attached directly to the grate top surface. The air plenum unit is coupled to an air supply for providing combustion air through the top grate surface air-flow apertures. The air plenum unit includes multiple zones, each of which zones has an associated air flow control damper so that the flow of combustion air can be controlled. Ash siftings formed on the grate top surface when the biomass or other fuel is combusted fall into the air plenum unit and flow toward at least one ash-siftings discharge opening at a discharge end of the air plenum when the grate top surface and the air plenum is vibrated.

Abstract: A shaking grate having inclined continuous tubes disposed parallel to the direction of incline and communicating with a liquid or fluid coolant circuit. The tubes are arranged on a vibrating grate carriage. The shaking grate is made free of grate bars by means of a planar tube-crosspiece-tube grate sheet construction, with the tube crosspieces having slot-shaped openings which are conically tapered in the direction of the fuel bed. The shaking grate is free of slots in the region of the fuel bed inlet as far as to the beginning of the first combustion zone of the fuel bed. The shaking grate is connected with crossbars of the vibrating grate carriage via ridge or comb plates and heat-compensating gliding elements. The shaking grate is provided with a riser for the draining liquid or fluid coolant. The riser is arranged in the charging region of the fuel bed inlet.

Abstract: A grate characterized in that a fuel supporting and conveying surface is provided comprising at least one elongate channel having an open mouth and a bottom, the or each of said channels having a transverse cross-section which decreases in width in a direction extending away from the open mouth towards the bottom of the channel, air feed opening means to feed air to the interior of the channel at least in the region of the bottom thereof, and means mounting the channel to permit the channel to be vibrated to cause fuel to be conveyed along the channel and longitudinally of the grate.