Method for the removal of deposits on the internal walls of industrial furnaces of bunkers

Abstract

In a method for the removal of deposits from the inner walls of industrial furnaces and bunkers or for the destruction of material accumulations by shelling with an industrial cannon, the shells include an explosive charge and an impact detonator and are driven out of the cannon by compressed air with a controllable travel speed.

Description

BACKGROUND OF THE INVENTION [0001] The invention relates to a method for the removal of deposits from the internal walls of industrial furnaces or bunkers such as blast furnaces, cement ovens, waste incineration plants, coal-burning power plants or other plants such as large silos, bulk material bunkers, mixing bunkers, etc . . . [0002] On the inner walls of industrial furnaces or bunkers increasingly thick layers of slag, encrustations or other deposits are built up during operation. It is necessary from time to time to remove these deposits in order to maintain an efficient operation. Since such deposits may be quite thick and, because of their strength and hardness, are difficult to remove, it is quite common to remove these deposits by shelling the interior walls with industrial cannons whereby the deposits are broken off the walls. [0003] With the industrial cannons generally used today, which are of a design and operated similar to machine guns, a special ammunition with a dri...

AI Technical Summary

Benefits of technology

[0010] For shooting of the ammunition by compressed air, the weight of the industrial cannon can be substantially reduced and, more importantly the travel speed of the shells can be easily adjusted to the particular conditions by adjusting the air pressure used: For a larger travel distance of the shell or smaller deposit thickness, it can be reduced, that is, the exposure of the wall to the shell impact is controllable. Since, furthermore, the shells include only a percussion detonator and a relatively small explosive charge, the shell which is lighter than those used by the conventional industrial cannons still generates on impact a high energy for the destruction of deposits and their removal from the wall and those effects are spread over a relatively large area and not limited just to the cross-section of the shell as it occurs with the conventional ammunition which generates extremely high local pressures.

[0023] The air-pressure operated industrial cannon may be compact and have a weight of only about 15 kg—including the shell. This is only about a sixth of the weight of a conventional industrial cannon using normal ammunition. The industrial cannon according to the invention can therefore easily be transported and be set up in operating position and operated by one person.

Problems solved by technology

Such enormous deposit volumes cannot economically be removed with a conventional industrial cannon or rather with the ammunition used thereby.

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