Cold-end waste heat gradient-utilization energy-saving system and method

An energy-saving system and thermal system technology, which is applied in the field of waste heat utilization energy-saving system at the cold end, can solve the problems of reducing the economy of waste heat utilization devices and failure of waste heat recovery devices to be put into operation, and achieve the effect of increasing operating hours and improving economic efficiency

Pending Publication Date: 2016-10-12
DATANG BEIJING ENERGY MANAGEMENT
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This has great application limitations
And in non-heating areas (such as southern provinces) and non-heating seasons (spring, summer and autumn), waste heat recovery devices cannot be put into operation, and the annual operating hours are very effective
Greatly reduces the economy of the waste heat utilization device

Method used

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  • Cold-end waste heat gradient-utilization energy-saving system and method

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Embodiment Construction

[0015] Attached below figure 1 To further describe the present invention, it should be understood that the content described here is only for illustrating and explaining the present invention, and is not intended to limit the present invention.

[0016] The energy-saving system for cascade utilization of waste heat at the cold end of the present invention includes three systems: A heat extraction system, B heat medium control system, and C heating system;

[0017] Heat extraction system includes steam turbine 1, condenser 2, heat pump unit 3; heating system includes boiler primary air or secondary air system, boiler primary air or secondary air heating system; heat medium control (water medium) system includes closed cycle Intermediate water (water media), pipelines, valves, heating steam system, water supply system, constant pressure system, sewage system, etc.

[0018] 1. Heat extraction system

[0019] The heat extraction system includes a steam turbine 1 , a condenser 2 ...

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Abstract

The invention discloses a cold-end waste heat gradient-utilization energy-saving system which comprises a heat removal system, a heat medium control system and a heating system, wherein the heat removal system is accessed to a circulating cooling water pipeline; the heat medium control system is connected to the heat removal system and the heating system; a heat pump unit in the heat removal system is connected to the circulating cooling water pipeline and an intermediate water pipeline in the heat medium control system; the intermediate water pipeline in the heat medium control system is connected to the heating system; and the heating system is accessed to a boiler primary air or secondary air system. The waste heat is recycled and utilized in a gradient manner, so that cold-end loss of a power device is reduced, efficiency of the power device is improved, operation hours per year of the device are greatly increased, and economical efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the field of energy saving in power plants, and in particular relates to an energy saving system for utilizing waste heat at the cold end Background technique [0002] Coal is the main primary energy source in my country (accounting for 64.2% of primary energy consumption in 2014 and expected to be 63.3% in 2015), mainly concentrated in thermal power, metallurgy and building materials industries. Thermal power units are the main power generation units in my country, and their installed capacity accounts for about 73% of the total installed capacity of electric power, and their power generation accounts for more than 80% of the total power generation. Therefore, reducing the coal consumption of thermal power units and improving the efficiency of power plants is of great significance to my country's energy saving and emission reduction. [0003] A heat pump is a device that uses high-grade heat energy as a driving energy and rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22D1/32F22D1/36F23L15/00F25B30/06
CPCF22D1/32F22D1/36F23L15/00F25B30/06Y02E20/34
Inventor 杨磊磊李本锋卢海申马建忠郭清温王岩郭永红
Owner DATANG BEIJING ENERGY MANAGEMENT
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