Research and Practice on Development Path of Low-carbon, Zero-carbon and Negative Carbon Transformation of Coal-fired Power Units Under “Double Carbon” Targets

doi:10.12096/j.2096-4528.pgt.22061

Abstract

Abstract:

Based on the existing relevant technical system, coal-fired power units can be gradually transformed through the “three-step” carbon reduction strategy, that is, through technical carbon reduction (coal consumption reduction and deep peak shaving) to achieve low carbonization, through fuel decarburization to achieve zero carbonization, through flue gas decarburization to achieve negative carbonization. The strategy makes coal-fired power units have advantages of reliable, harmonic and stable, and solves the high carbon emissions of the units. As a kind of zero-carbon new energy, biomass thermal power can simultaneously solve the following two dilemmas: the wind and solar new energy power plus energy storage can’t really ensure the safety of power grid; the traditional coal power is stable and adjustable, but the carbon emission intensity is too high. Biomass thermal power has become the backbone of China’s future low-carbon power supply, and will make historical contributions to the early realization of a new power system with new energy as the main body.

Key words: carbon peak, carbon neutrality, coal-fired power units, energy saving and consumption reducing, deep peak shaving, fuel decarburization, flue gas decarburization

CLC Number:

TK 01

Weizhong FENG, Li LI. Research and Practice on Development Path of Low-carbon, Zero-carbon and Negative Carbon Transformation of Coal-fired Power Units Under “Double Carbon” Targets[J]. Power Generation Technology, 2022, 43(3): 452-461.

Figures/Tables 6

References 38

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方案	典型节能量/ [g⋅(kW⋅h)^-1]	典型成本/万元	单位节能量成本/ [万元⋅g^-1⋅(kW⋅h)^-1]	综合性价比
汽轮机通流部分改造	10	5 500	550	理论性价比高，实际普遍收益快速衰减，导致实际单位投资翻倍甚至无法回本
跨代升级改造为准二次再热机组	25	85 000	3 400	投资过高，性价比很低；若考虑效率衰减，实际性价比更低
保持压力不变，主、再热汽温升至566 ℃	15	20 000	1 330	性价比较低，若考虑效率衰减，实际性价比更低
高温亚临界综合升级改造	35	35 000 (29 000)	1 000 (829)	性价比较好，能长期保效，大幅延寿且同时有深调能力，综合性价比高

方案	典型节能量/ [g⋅(kW⋅h)^-1]	典型成本/万元	单位节能量成本/ [万元⋅g^-1⋅(kW⋅h)^-1]	综合性价比
汽轮机通流部分改造	10	5 500	550	理论性价比高，实际普遍收益快速衰减，导致实际单位投资翻倍甚至无法回本
跨代升级改造为准二次再热机组	25	85 000	3 400	投资过高，性价比很低；若考虑效率衰减，实际性价比更低
保持压力不变，主、再热汽温升至566 ℃	15	20 000	1 330	性价比较低，若考虑效率衰减，实际性价比更低
高温亚临界综合升级改造	35	35 000 (29 000)	1 000 (829)	性价比较好，能长期保效，大幅延寿且同时有深调能力，综合性价比高

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