This article introduces the present status anddevelopment of 600 MW class boilers in China. The statisticaldata indicate that most 600 MW generating units experiencedrelatively length" growing up" period. In...This article introduces the present status anddevelopment of 600 MW class boilers in China. The statisticaldata indicate that most 600 MW generating units experiencedrelatively length" growing up" period. In this period, unitscould not operate stably , their unplanned outage times weremany and durations long, and availabilities low. On the basis oftesting and research and the summing-up of practice, it wasindicated slagging in the furnace, deviation of tine gas energy atthe exit of furnace, and overheating bursting of superheater andreheater etc, endangering the safety and economics ofoperation,main problems could be completely alleviated oravoided through design and type selection of boiler furnace andburners, coal characteristics and coal handling management,and optimization management of operation conditions etc.展开更多
CO_(2)capture from coal power plants is an important and necessary solution to realizing carbon neutrality in China,but ccs demonstration deployment in power sector is far behind expectations.Hence,the reduction poten...CO_(2)capture from coal power plants is an important and necessary solution to realizing carbon neutrality in China,but ccs demonstration deployment in power sector is far behind expectations.Hence,the reduction potential of energy consumption and cost for CcS and its competitiveness to renewable powers are very important to make roadmaps and policies toward carbon neutrality.Unlike the popular recognition that capturing CO_(2)from flue gases is technically and commercially mature,this paper notes that it has been proved to be technically feasible but far beyond technology maturity and high energy penalty leads to its immaturity and therefore causes high cost.Additionally,the potential energy penalty reduction of capture is investigated thermodynamically,and future CO_(2)avoidance cost is predicted and compared to renewable power(solar PV and onshore wind power).Results show that energy penalty for CO_(2)capture can be reduced by 48%-57%.When installation capacity reaches a similar scale to that of solar PV in China(250 GW),CO_(2)capture cost in coal power plants can be reduced from the current 28-40 USs/ton to 10-20 USs/ton,and efficiency upgrade contributes to 67%-75%in cost reduction for high coal price conditions.In China,CO_(2)capture in coal power plants can be cost competitive with solar PV and onshore wind power.But it is worth noting that the importance and share of CCS role in CO_(2)emission reduction is decreasing since renewable power is already well deployed and there is still a lack of large-scale CO_(2)capture demonstrations in China.Innovative capture technologies with low energy penalties need to be developed to promote Ccs.Results in this work can provide informative references for making roadmaps and policies regarding CO_(2)emission reductions that contribute towards carbon neutrality.展开更多
文摘This article introduces the present status anddevelopment of 600 MW class boilers in China. The statisticaldata indicate that most 600 MW generating units experiencedrelatively length" growing up" period. In this period, unitscould not operate stably , their unplanned outage times weremany and durations long, and availabilities low. On the basis oftesting and research and the summing-up of practice, it wasindicated slagging in the furnace, deviation of tine gas energy atthe exit of furnace, and overheating bursting of superheater andreheater etc, endangering the safety and economics ofoperation,main problems could be completely alleviated oravoided through design and type selection of boiler furnace andburners, coal characteristics and coal handling management,and optimization management of operation conditions etc.
基金the National Natural Science Foundation of China(52122601)Innovation Academy for Green Manufacture,Chinese Academy of Sciences(IAGM2020C15).
文摘CO_(2)capture from coal power plants is an important and necessary solution to realizing carbon neutrality in China,but ccs demonstration deployment in power sector is far behind expectations.Hence,the reduction potential of energy consumption and cost for CcS and its competitiveness to renewable powers are very important to make roadmaps and policies toward carbon neutrality.Unlike the popular recognition that capturing CO_(2)from flue gases is technically and commercially mature,this paper notes that it has been proved to be technically feasible but far beyond technology maturity and high energy penalty leads to its immaturity and therefore causes high cost.Additionally,the potential energy penalty reduction of capture is investigated thermodynamically,and future CO_(2)avoidance cost is predicted and compared to renewable power(solar PV and onshore wind power).Results show that energy penalty for CO_(2)capture can be reduced by 48%-57%.When installation capacity reaches a similar scale to that of solar PV in China(250 GW),CO_(2)capture cost in coal power plants can be reduced from the current 28-40 USs/ton to 10-20 USs/ton,and efficiency upgrade contributes to 67%-75%in cost reduction for high coal price conditions.In China,CO_(2)capture in coal power plants can be cost competitive with solar PV and onshore wind power.But it is worth noting that the importance and share of CCS role in CO_(2)emission reduction is decreasing since renewable power is already well deployed and there is still a lack of large-scale CO_(2)capture demonstrations in China.Innovative capture technologies with low energy penalties need to be developed to promote Ccs.Results in this work can provide informative references for making roadmaps and policies regarding CO_(2)emission reductions that contribute towards carbon neutrality.
