Abstract: A method for determining positioning of a controllable blower lance for cleaning a pre-determinable surface of a heatable internal chamber, preferably a combustion chamber, in which deposits form, wherein at least one site of impact of a cleaning medium of the blower lance on a surface to be cleaned of the internal chamber and at least one position of at least a part of the blower lance, by means of which the direction of flow of the cleaning medium out of the blower lance can be determined, are established and recorded and a correlation is established between at least the site of impact and the position, taking into account at least one parameter concerning the internal chamber, wherein by means of the correlation, the positioning of the blower lance can be determined for cleaning the pre-determinable surface.

Abstract: An elongated element, for example, a soot blower for the cleaning of wall surfaces, is guided along a predetermined, meandrical blow figure. The element is supported in two spaced-apart cardanic joints (3, 4) the first of which is stationary and the second axially moveable on a first spindle (6) the ends of which are axially moveable on two parallel second spindles (8). The first and one of the second spindles (6, 8) are each provided with two non-mechanical, inductive proximity switches or end switches (11-14) which are connected with a controller (16) having a memory and being programmable. The end switches (13, 14) detect a reference point in horizontal and vertical directions, and two end switches (11, 12) detect the rotations of the spindles (6, 8) as a measure of the distance travelled by the second cardanic joint (4).

Abstract: An elongated element, for example, a soot blower for the cleaning of wall surfaces, is guided along a predetermined, meandrical blow figure. The element is supported in two spaced-apart cardanic joints (3, 4) the first of which is stationary and the second axially moveable on a first spindle (6) the ends of which are axially moveable on two parallel second spindles (8). The first and one of the second spindles (6, 8) are each provided with two non-mechanical, inductive proximity switches or end switches (11-14) which are connected with a controller (16) having a memory and being programmable. The end switches (13, 14) detect a reference point in horizontal and vertical directions, and two end switches (11, 12) detect the rotations of the spindles (6, 8) as a measure of the distance travelled by the second cardanic joint (4). The impulses of the end switches.

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: 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.