One of the most important criteria when using heat exchangers is efficient cleaning. Only optimal heat transfer guarantees the maximum effectiveness and economic efficiency of modern boiler plants.
Dust and deposits on heating surfaces significantly impair heat transfer. Removing these deposits is the main task of shot cleaning systems.
In this cleaning system, steel balls are introduced at the top of the heat exchanger and fall through to the lower boiler hopper. On their way down, the balls bounce back and forth between the tubes, repeatedly striking their surfaces and thereby removing dust and deposits from all sides of the tube walls.
Below the boiler hopper, dust, balls, and coarse particles are separated in a screening unit. Dust and coarse particles are fed to the boiler’s ash removal system, while the balls fall into the ball collection container. A fan then conveys the balls back to the top for another cleaning cycle.
What MHI Maschinenbau GmbH pays particular attention to:
The circulation time and activation frequency of the systems are adapted to the degree and type of fouling, ensuring optimal cleaning of the heating
surfaces. The latest monitoring devices enable trouble-free and low-maintenance operation.
This is an environmentally friendly cleaning method without toxic wastewater. Its effectiveness has been proven in numerous plants both domestically and abroad. Cleaning can be carried out during operation and at temperatures of up to 1,000 °C.
Shot cleaning units keep heat exchangers behind industrial furnaces using solid and liquid fuels clean, such as waste incineration plants, biomass boilers, gas-fired plants, air heaters behind cupola furnaces, oil heaters, black liquor recovery boilers, waste heat boilers on ships, diesel waste heat boilers, and many other types of waste heat boilersthereby maintaining the required efficiency levels.
