Arrange heating surface and water cooled support structure reasonably within the limited furnace space. The three dimensional structure or four dimensional structure makes sure a reasonable radiation heat transfer efficiency. In addition, the reliable front and rear water cooled arch supporting structure ensures the safe and stable operation of the boiler.

The boiler is especially designed for middle or low calorific value fuels, such as bituminous coal, lignite coal. In order to reach the ideal boiler operation, it is designed with a relative wider cross-sectional dimension of grate.

Advanced boiler grate design reduce the air leak efficiently, so the grate can operate stably and the combustion efficiency is grate improved, better grate effects, low breakdown rate, the service life is extended.

Optimization of air structure keeps the fully combustion of fuel in furnace, low energy cost, low environment pollution.

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