Arrangement structure suitable for inverted pulverized coal boiler with ultra-high steam temperature steam parameters

An arrangement structure suitable for an inverted pulverized coal boiler with ultra-high steam temperature steam parameters, the arrangement structure comprising:

• a hearth comprising a bottom outlet including a slag discharge opening, wherein wall burners are arranged on an upper part of a side wall of the hearth or top burners are arranged on a top of the hearth;
• a lower part of the side wall of the hearth includes a hearth flue gas outlet, and the hearth flue gas outlet is in flue gas communication with one end of a hearth outlet horizontal flue, while an other end of the hearth outlet horizontal flue is in flue gas communication with a bottom of a middle uplink flue, and a top of the middle uplink flue is in flue gas communication with a top of a tail downlink flue;
• a platen heating surface is arranged within a lower interior portion of the hearth, and convection heating surfaces including an economizer, a superheater pipe set and a reheater pipe set are arranged inside the middle uplink flue, wherein a final superheater of the superheater pipe set is arranged in a lower part of the middle uplink flue so as to supply high-temperature steam through at least one high-temperature steam pipe to a high-pressure cylinder of a steam turbine, a final reheater of the reheater pipe set is arranged in the lower part of the middle uplink flue so as to supply high-temperature steam through at least one high-temperature steam pipe to a medium-pressure cylinder of a steam turbine, a denitration system and an air preheater are arranged inside the tail downlink flue with the denitration system arranged above the air preheater, and a tail flue gas outlet is formed on a lower part of a side wall of the tail downlink flue.