Waste heat and water recovery system and method for coal-fired power plant

A technology for coal-fired power plants and water recovery, applied in combustion methods, chemical instruments and methods, water/sewage treatment, etc., can solve problems such as high energy consumption levels and difficult energy cascade utilization, and reduce overall investment and investment costs. , the effect of reducing energy consumption

Pending Publication Date: 2020-07-17
DATANG ENVIRONMENT IND GRP
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  • Application Information

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Problems solved by technology

The recovery of flue gas condensed water can reduce the energy consumption of water recovery and recover part of the water, but the existing technology is an isolated technology, it is difficult to realize the cascade utilization of energy, and the energy consumption level is still high

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  • Waste heat and water recovery system and method for coal-fired power plant
  • Waste heat and water recovery system and method for coal-fired power plant

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Embodiment Construction

[0048] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather t...

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Abstract

The invention provides a waste heat and water recovery system and method for a coal-fired power plant. The system comprises a boiler, an air pre-heater, a dust collector, a desulfurizer, a chimney, asteam turbine and a cooling regenerator, wherein the system further comprises a fume waste heat recovery device that is installed between the air pre-heater and the dust collector and is respectivelyconnected to the cooling regenerator and the air pre-heater, and a water recovery device installed between the desulfurizer and the chimney. The method comprises the following steps that the fume enters the fume waste heat recovery device after being discharged from the boiler, and is cooled by the cooling regenerator; the fume is further cooled in the fume waste heat recovery device; the cooled fume enters the water recovery device after being de-dusted by the dust collector; the fume entering the water recovery device is treated by the water recovery device to obtain water and solution, thesolution is put in the water recovery device, and the water is recovered. The waste heat and water recovery system and method for the coal-fired power plant provided by the invention reduce the overall investment while conserving energy and reducing emission.

Description

technical field [0001] The invention relates to the technical field of coal-fired power generation, in particular to a waste heat and water recovery system, method and system of a coal-fired power station. Background technique [0002] With higher requirements for energy saving and emission reduction of thermal power units, the average power supply coal consumption of incremental coal-fired generating units is less than 300 grams of standard coal / kWh, and the average power supply coal consumption of existing coal-fired generating units after transformation is less than 310 grams of standard coal / kW Time. Therefore, the realization of flue gas water recovery and flue gas waste heat recovery and energy saving in coal-fired power plants is a key problem to be solved urgently in the power industry. Improving the efficiency and operational flexibility of coal-fired power plants, reducing pollutant emissions and resource consumption are long-term concerns for coal-fired power pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J15/06F23J15/02F23J15/04F23L15/00C02F1/44C02F103/18
CPCC02F1/441C02F2103/18F23J15/022F23J15/04F23J15/06F23L15/00Y02E20/34
Inventor 文钰张晓明张国柱张钧泰李本锋
Owner DATANG ENVIRONMENT IND GRP
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