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Wide-load deep-peak-regulation power generation system coupling compressed air energy storage and coal-fired unit

A technology of compressed air energy storage and coal-fired units, which is applied in the direction of machines/engines, mechanical equipment, steam engine devices, etc., can solve the problems of increasing system coal consumption, uneconomical, slow response to load requests, etc., and achieve load distribution and deep regulation peak demand, improve work efficiency, and facilitate maintenance

Active Publication Date: 2021-10-29
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the boilers supporting conventional coal-fired units are operating at low load, there are problems such as the burner cannot burn stably, the flue gas temperature is low, the denitrification equipment cannot be put into normal operation, and the parameters of superheated steam and reheated steam decrease, which leads to the safety of the steam-water side.
At the same time, coal-fired boilers respond slowly to load requests, which affects the flexibility of thermal power units
[0004] When the conventional coal-fired thermal power unit is running at low load, in order to ensure the safe and stable operation of the boiler, the excess steam will enter the condenser cooler through the bypass, resulting in a waste of energy. At the same time, the operating efficiency of the boiler part load is low, increasing the coal consumption of the system, which is uneconomical

Method used

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  • Wide-load deep-peak-regulation power generation system coupling compressed air energy storage and coal-fired unit
  • Wide-load deep-peak-regulation power generation system coupling compressed air energy storage and coal-fired unit

Examples

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Effect test

example 1

[0065] like figure 1 Shown:

[0066] A wide-load deep peak-shaving power generation system coupled with compressed air energy storage and coal-fired units, including a coal-fired power generation sub-system and a compressed air energy storage sub-system connected to the coal-fired power generation sub-system;

[0067] The compressed air energy storage subsystem includes a steam turbine unit 37, an air compressor system, an indirect cooling system connected to the air compression system, an energy storage system connected to the indirect cooling system, and an energy storage system connected to the energy storage system. A heating system, and an air turbine system connected to the heating system; the steam turbine unit three is connected to the coal-fired power generation sub-system.

[0068] Preferably, the load variation range of the coal-fired power generation sub-system is 5%-100%, and the capacity covers 5MW-1000MW.

[0069] In some possible implementations, the air comp...

Embodiment 2

[0088] like figure 2 as shown,

[0089] The difference between this embodiment and Embodiment 1 is that a reheat steam pipeline is set between boiler 1 and steam turbine unit 2 3; a reheat and cold section pipeline is also set between steam turbine unit 1 2 and boiler 1, and the steam turbine is canceled The connecting pipe between unit one 2 and steam turbine unit two 3.

[0090] In this embodiment, the reheat cold section pipeline and the reheat steam pipeline are added. When the coal-fired power generation sub-system is operating at low load, the steam turbine unit 37 in the compressed air energy storage sub-system can undertake industrial steam and supply. The task of heating steam can effectively guarantee the industrial gas and heating steam during the low load of the system and the operation of frequency modulation and peak regulation.

[0091] Other parts of this embodiment are the same as those of Embodiment 1, so they will not be described in detail.

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Abstract

The invention relates to the technical field of power generation, and particularly discloses a wide-load deep-peak-regulation power generation system coupling compressed air energy storage and a coal-fired unit. The system comprises a coal-fired power generation subsystem and a compressed air energy storage subsystem connected with the coal-fired power generation subsystem; the compressed air energy storage subsystem comprises a third steam turbine unit, an air compressor system, an indirect cooling system connected with the air compressor system, an energy storage system connected with the indirect cooling system, a heating system connected with the energy storage system, an air turbine system connected with the heating system, and a first generator connected with the air turbine system; and the third steam turbine unit is connected with the coal-fired power generation subsystem. According to the system, stable and safe operation of a boiler and low-load operation of the steam turbine are guaranteed, redundant energy is recycled, and the operation requirements of wide load, deep peak regulation and fast load demand response of the system are met.

Description

technical field [0001] The invention relates to the technical field of power generation, more specifically, to a wide-load deep peak-shaving power generation system coupled with compressed air energy storage and coal-fired units. Background technique [0002] At present, the installed capacity of coal-fired units in my country is about 770GW, which accounts for a large proportion in my country's energy structure and occupies a dominant position in thermal power generation. In 2020, the National Energy Administration issued a document requiring all domestic thermal power companies to undertake non-hydro renewable energy power generation quotas, which must account for more than 15% of thermal power generation. At the same time, with the improvement of environmental protection requirements for energy structure optimization, thermal power units need to further improve peak shaving performance and improve efficiency, energy conservation and emission reduction to meet the requirem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K13/00F01K11/02F01K13/02F01D15/10F01D17/14F01D15/08F01D13/02F04B35/00F04B37/12F04B41/02
CPCF01K13/00F01K13/02F01K11/02F01D15/10F01D15/08F01D13/02F01D17/145F04B35/006F04B41/02F04B37/12Y02E60/16
Inventor 侯明军翟璇张小波杨佐卫罗方范立华李志明张文挺黄正敏安宁
Owner DONGFANG TURBINE CO LTD
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