Abstract: A soot blower unit with an axially moved soot blower for the cleaning of heating surfaces of a heat exchanger (1) consists of a lance tube (4) and of a travel carrier (11), which is provided with a track rail (9) and fastened at the wall (2) of the heat exchanger (1). The lance tube (4) is guided at its forward end in a lance tube guide (15) and connected at its rearward end with a blower carriage (7), which is movable on the track rail (9). The vertical spacing of the track rail (9) of the travel carrier (11) from the forward end (h.sub.1) of the lance tube (4) is less than from the rearward end (h.sub.2), which is retained by the blower carriage (7), of the lance tube (4).

Abstract: A soot-removal blower comprising , first, a lance (1) with nozzles (2) at the tip and with its base connected by way of a valve (9) to a supply of fluid and, second, a choke in path of the fluid. The choke is inside the lance in the vicinity of the nozzles.

Abstract: Device for sealing retractable soot-blower lances at the point of insertion through the wall of a heat exchanger. A labyrinth box consists of lamellas. The lamellas narrowly surround the soot-blower lances and are secured at the outer edge in a wall box. The wall box is tightly sealed to the wall of the heat exchanger and has an air-barrier connection. The object is to allow one wall box to accommodate several soot-blower lances, even when they have different outside diameters. Several soot-blower lances accordingly extend through the wall box and several lamellas radially surround the soot-blower lances alternately either narrowly or loosely.

Abstract: A soot blower for cleaning heating surfaces of a heat exchanger wherein a lance has jets at its front and is connected at its rear through a soot blower valve to a feed line for a blowing medium. The lance passes through a wall of the heat exchanger and is sealed by a wall casing where the lance passes into the heat exchanger. A connector is provided for a purging medium for the lance between the soot blower valve and the jets of the lance. There is also a connector for a sealing medium on the wall casing. A compressor generates and distributes purging medium and sealing medium for the soot blower connected to the respective connectors. A check valve between the soot blower valve and the purging medium connector prevents flow of blowing medium into the generating and distributing compressor.

Abstract: A soot blaster has a lance tube which is retractable and linearly movable. At least one of these movements can be interrupted by a time-delay relay when the tube reaches its frontmost operating position.

Abstract: A soot blower is provided with a lance which is axially and rotatable displaceable by means of a motor. A driving wheel for effecting the axial displacement is connected with a driving shaft through two free-wheel devices having entrainment members which act in opposite directions and lost motion in the rotational direction of the driving shaft is provided for in one of the free-wheel devices.