Waste heat utilizing system of thermal power plant and thermal power unit

A technology for thermal power plants and heat exchange systems, applied in preheating, feed water heaters, lighting and heating equipment, etc., can solve the problems of low thermal efficiency of the whole plant, no utilization, low energy utilization rate of thermal power plants, etc., to save energy The effect of coal consumption, reducing heat consumption and improving overall efficiency

Active Publication Date: 2014-02-12
CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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Problems solved by technology

[0003] At present, the energy utilization rate of thermal power plants is relatively low, and the thermal efficiency of the whole plant is between 35% and 45%. The thermal efficiency o

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  • Waste heat utilizing system of thermal power plant and thermal power unit
  • Waste heat utilizing system of thermal power plant and thermal power unit
  • Waste heat utilizing system of thermal power plant and thermal power unit

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Embodiment Construction

[0085] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but only to illustrate the essence of the technical solutions of the present invention. The same or similar parts in the figures are denoted by the same reference numerals.

[0086] Hereinafter, main technical terms of the present invention will be described.

[0087] Herein, the boiler mainly includes a boiler device. The boiler device is not specifically limited, as long as it does not limit the purpose of the present invention, it is known to those skilled in the art. π-type boilers (or pie-type boilers), tower boilers, inverted U-shaped boilers, etc. can be used, coal-fired boilers, oil-fired boilers, gas-fired boilers, etc.,...

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Abstract

The invention provides a waste heat utilizing system of a thermal power plant and a power unit. The waste heat utilizing system of the thermal power plant comprises a boiler outlet flue gas waste heat utilizing system, an air preheater outlet flue gas waste heat utilizing system and a driving steam turbine steam exhaust waste heat utilizing system; the flue gas of the air preheater outlet is used for heating the condensed water from a low-pressure heater; the driving steam turbine steam exhaust waste heat utilizing system comprises a steam-water heat exchanger and an air-water heat exchanger which are formed into a steam-water-air heat exchange system; primary air and or secondary air of the air preheater inlet are or is heated by the steam exhaust of a driving steam turbine through the steam-water-air heat exchange system; the feed water and the condensed water are heated by part of high temperature flue gas of the boiler outlet. According to the waste heat utilizing system of the thermal power plant and the thermal power unit, the waste heat energy of the thermal power plant is effectively utilized and accordingly the efficiency of the thermal power plant is improved, meanwhile the coal consumption is reduced, and emissions of pollutants are reduced.

Description

technical field [0001] The invention relates to the field of thermal power generation, in particular to a thermal power plant waste heat utilization system and a thermal power unit. Background technique [0002] With the development of the national economy, the society's demand for electricity is constantly increasing. For emerging developing countries that are undergoing industrialization and rapid economic development, such as China, the consumption of electricity and the installed capacity of power plants are increasing rapidly. As far as China is concerned, due to the limitation of its primary energy storage types and storage capacity, coal has been the main fuel for power plants in recent decades, accounting for more than 70%, and this trend will not occur in the foreseeable future. radical change. Although coal-fired power plants have advantages such as low cost and wide range of fuel sources for China, they have disadvantages such as low efficiency and high pollutan...

Claims

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Application Information

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IPC IPC(8): F22D1/40F22D1/36F22D1/50
Inventor 叶勇健申松林陈仁杰施刚夜
Owner CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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