Clyde Bergemann Power Group: Product Sectors - Cleaning Systems

Mechanical Rapping Device

Pneumatic Rapping Device

System Description

A rapping device is a special facility for boiler cleaning. By rapping the fouled convection heating surfaces the bank tubes are caused to vibrate so that the deposited combustion residues fall off. No air or steam supply is necessary as blowing medium.

Parameter for successful cleaning

Impact energy
Impact frequency
Vibration behaviour of heating surface
Supension of heating surface
Characteristics of deposits
(sintered molten slag/porous deposits)

Cleaning takes place by means of mechanical hammers or by pneumatically driven impact cylinders. For heavy fouling pneumatic rapping devices are recommended which enable
higher impact energies and, as a result, a still better cleaning effect.

Sections of extraordinarily difficult accessibility can be reached with the help of individual rappers.

Field of Application

Especially long-stretched boiler passes (i. e. horizontal passes) of the type often encountered in waste incineration plants, can be cleaned with the help of a rapping device. But also other
plants in which no other fluids are admitted to the flue gas and in which dust-laden, loose deposits are formed during the combustion, lend themselves very well to the use of a rapping device. With its help both superheaters and evaporators and the downstream economizers are freed from deposits.

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http://www.clydebergemann.de