Energy-saving and low-dust emission coal-fired power generation system

The invention relates to an energy-saving and low-dust emission coal-fired power generation system. The energy-saving and low-dust emission coal-fired power generation system comprises a boiler, a desulfurization tower and an electrostatic dust collector. The energy-saving and low-dust emission coal-fired power generation system is characterized in that a waste heat recovery system is arranged in the upstream direction of the desulfurization tower, and a dedusting system is arranged behind the desulfurization tower; a waste heat recovery system is arranged in the upstream direction of the desulfurization tower; or a dedusting system is arranged behind the desulfurization tower. The waste heat recovery system recovers heat in a high-temperature flue gas at a tail part of the boiler and sends the heat into a steam turbine heater, and comprehensive utilization of flue gas waste heat is achieved through saving of extraction flow of the heater. The invention provides an energy-saving and low-dust emission coal-fired power generation system, clean emission in a true sense is achieved through the waste heat recovery system and the dedusting system, and the energy-saving and low-dust emission coal-fired power generation system is simple, reliable and efficient.