A
honeycomb type
coal boiler with hot
flue gas bidirectional ignition, high-rank
coal adaptability and
variable load belongs to the boiler technical field, in particular relates to
stream for burning
honeycomb type
coal and a hot-water boiler. A right
hearth of the invention is provided with a right side
hearth hogging; the left
hearth is provided with a left side hearth face arch and a left side hearth rear arch; the structures of the left hearth and the right hearth are asymmetrical; the
flue gas channels of the left hearth and the right hearth are also asymmetrical; the invention adopts the mode that the hot
flue gas downwards the right hearth and upwards the left hearth ignites
bituminous coal in the boiler; the invention solves the following problems that: 1. After the whole hot
flue gas is downward to ignite the
bituminous coal in the boiler, the
flue gas directly enters to the subordinate heating surface for cooling and causes the problems that
black smoke is emitted from the boiler,
coal tar is condensed from the tube wall of the
tail heating surface condenses and causes the block, the
shut down of the boiler and the decrease of the
thermal efficiency; 2. The desulphurization degree in the coal boiler is low; 3. The coal boiler has poor load adjusting performance; 4. The coal has slow burning speed, high manufacturing cost and large occupied area; 5. The coal boiler is uneasy to be large-sized. The invention has the advantages of higher burning efficiency, stronger coal-rank adaptability, better
environmental protection and more reliable operation.