System for assisting coal-burning boiler to generate power by utilizing solar energy and waste heat of ash residue

A technology of coal-fired boilers and solar energy, which is applied in solar thermal power generation, mechanical power generation with solar energy, energy industry, etc., can solve problems such as system instability, achieve the effects of improving economy, reducing area, and ensuring stability

Inactive Publication Date: 2013-11-27
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a system that uses solar energy and ash waste heat to assist coal-fired boilers to generate electricity, which is used to solve the problem that the existing solar-assisted coal-fired thermal power generation systems are easily affected by time, seasons and environmental factors, and then switch frequently The problem of system instability caused by steam extraction of high pressure heater and low pressure heater

Method used

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  • System for assisting coal-burning boiler to generate power by utilizing solar energy and waste heat of ash residue
  • System for assisting coal-burning boiler to generate power by utilizing solar energy and waste heat of ash residue

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Embodiment 1

[0026] figure 1 It is a system structure diagram of utilizing solar energy and ash waste heat to assist a coal-fired boiler to generate electricity provided by Embodiment 1. like figure 1 As shown, the system for using solar energy and ash waste heat to assist coal-fired boiler power generation provided by the present invention is an improvement on the existing solar energy-assisted coal-fired boiler power generation system. The existing solar energy-assisted coal-fired boiler power generation system includes a coal-fired boiler 1 and a solar heat collection field 24 . The system provided by the present invention adds a solid waste heat recovery device 16, a heat accumulator 19 and an oil-water heat exchanger 14 to the existing solar-assisted coal-fired boiler power generation system.

[0027] Among them, the solid waste heat recovery device 16 is connected to the coal-fired boiler 1 through the slag discharge channel 15, and the heat accumulator 19 and the solid waste heat ...

Embodiment 2

[0045] figure 2 It is a system structure diagram of utilizing solar energy and ash waste heat to assist a coal-fired boiler to generate electricity provided by Embodiment 2. The difference between this embodiment and the structure provided by Embodiment 1 is that the water supply pipeline 31 is connected in parallel with the water pipes between No. Nine valves 13, and the eleventh valve 5 is installed in the water pipe between No. 2 and No. 3 high-pressure heaters. This structure enables the oil-water heat exchanger 14 to use the obtained heat to heat the feed water between No. 2 and No. 3 high pressure heaters, so that No. 2 high pressure heater does not need to extract steam from the high pressure cylinder HP. Furthermore, the oil-water heat exchanger 14 can replace part or all of the extracted steam of the No. 2 high-pressure heater to heat the boiler feed water, thereby reducing heat loss in the high-pressure cylinder HP and improving the working efficiency of the high-p...

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Abstract

The invention discloses a system for assisting a coal-burning boiler to generate power by utilizing solar energy and the waste heat of ash slag in the technical field of design and manufacture of power generation equipment of the coal-burning boiler. The system comprises the coal-burning boiler, a solar heat-collecting field, a solid waste-heat recovery device, a heat storage device and an oil-water heat exchanger, wherein the solid waste-heat recovery device is connected with the coal-burning boiler by a slag discharging channel; the heat storage device and the solid waste-heat recovery device are connected in series by a first oil-pipe loop; the oil-water heat exchanger and the heat storage device are connected in series by a second oil-pipe loop; two circulation pipelines of the solar heat-collecting field are connected into the second oil-pipe loop in parallel; the oil-water heat exchanger is provided with a water feeding pipeline; the water feeding pipeline is connected with a water pipe between any two adjacent heaters of the coal-burning boiler in parallel to form a water feeding loop. The system disclosed by the invention has the advantages that the recovery and the utilization of waste heat of a power generation unit are realized, the operation stability of the system is guaranteed and the discharging amount of pollutants in the production process of a power plant is reduced.

Description

technical field [0001] The invention belongs to the technical field of design and manufacture of coal-fired boiler power generation equipment, and in particular relates to a system for assisting coal-fired power generation by using solar energy and waste heat from ash residue. Background technique [0002] At present, my country's traditional thermal power generation units are facing many problems in the process of generating electricity. The rise of primary energy prices, the requirements of national energy conservation and emission reduction policies, and the regulation of electricity prices are all closely related to the economical and effective operation of traditional thermal power generating units. As a renewable energy source, solar energy will have an important impact on my country's future energy development. However, due to the high investment cost of solar thermal power generation, the relevant promotion is only in the preliminary stage. Solar-assisted coal-fire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K27/02F03G6/06
CPCY02E10/46Y02P80/15
Inventor 侯宏娟蔡文汇付立王修彦王梦娇
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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