下载排行
The application of ASPEN PLUS software on the simulation of FGD by ammonia
CHEN Miao-bing,SUN Ke-qinThe model for simulation of wet FGD technical by ammonia was established based on flow-simulated software ASPEN PLUS.Lots of notices during the simulation were introduced,such as selection of modules,how to choose property,input of parameters and sensitivity analysis.The influence of desulfurization efficiency by technical parameters such as concentration of absorbent,flux of flue gas were analyzed.
Overview of multivariate electrochemical energy storage technologies
ZHAN Junzhe;SHI Zezhong;WANG Tao;In the context of carbon peaking and carbon neutrality, the world is developing wind power, photovoltaic and other new energy on a large scale. However, they are inherent intermittent and their applications need to be combined with high-performance and low-cost energy storage systems. Electrochemical energy storage technology has the advantages of high energy density, high efficiency conversion, long cycle life, green environmental protection, portability and so on, in line with the current requirements for energy storage, and is widely used in renewable energy storage,electric vehicles, microelectronics products and future smart grid. In order to study the development prospect of electrochemical energy storage technology, here we compare the electrochemical energy storage technology with traditional energy storage methods, highlight the advantages of electrochemical energy storage technology; detailly introduce the basic composition units of electrochemical energy storage system; summarize the electrochemical energy storage system including lithium ion battery, lithium sulfur battery, sodium ion battery and potassium ion battery and introduce their positive and negative electrode materials, electrolyte, diaphragm and working principle, and clarify the current problems and reasonable solutions. Combined with the analysis of the current research status in the field of electrochemical energy storage technology, the basic principles, the advantages and disadvantages, and potential application prospects of various electrochemical energy storage technologies, here we aim to provide reference for electrochemical energy storage system, materials and applications, and also provide reference for the development of electrochemical energy storage technology.
Networked control system research review
ZHANG Ying;SI Ruicai;CAO Wei;The main problems of networked control system(NCS) such as network-induced delay,data packet loss,single-packet transmission and multi-packet transmission were firstly presented in this paper.Then,the research methods and current development status were introduced based on the main problems of NCS in recent years.Finally,the problems that needed to be further solved in NCS research and future research directions were discussed.
Study and application of simultaneous desulfurization and denitrificaion of flue gas from thermal power plants
BAI Yuan,LI Zhang-hua,XUE Jian-ming,et alThe simultaneous desulfurization and denitrification technologies were introduced briefly.The reaction mechanism,technical characteristics and process of several simultaneous desulfurization and denitrification technologies were reviewed by the research.The research development of the simultaneous desulfurization technogies and denitrification of flue gas in thermal power plants were analyzed.Furthermore,according to the present research process,some suggestions about future work were put forward.
Development trend of municipal solid waste treatment technology and its countermeasures
It is concluded that generating electricity by incinerating municipal solid waste(MSW) is the most popular way in China especially in the developed areas which has large population but with less land.This conclusion is based on contrasting different treatment methods with all things considered and analyzed MSW treating status quo and trends all over the world.To prevent quadratic pollution and avoide dissension,it is suggested that the relative environmental code should be constituted and amended,EIA management and daily supervise should be strengthened.
Exploration of biomass direct combustion technology
The biomass direct combustion power generation technology and its equipment working process are discussed and analyxed. It focused on the biomass boiler combustion process fuel collection and storage,feed blockage and heating surface coking and other issues. Some improvements to optimize operations and improve boiler efficiency are put forward.
Research on present situation and development tendency of atmospheric environmental quality in China
The fast development of economy has caused the rapid growth of energy consumption and brought serious environmental pollution in our country in recent years.Through reviewing the basic condition of atmospheric environmental quality,the main reasons of air pollution in our country were generally analyzed.The present situation of thermal power industry was introduced in detail,which is the main source of air pollution.The change tendency of atmospheric environmontal quality was forecasted based on this analysis.
Analysis and suggestions on development of offshore wind power in China
HU Wensen;YANG Xigang;LI Gengda;Vigorously developing renewable energy is an important means to cope with global climate change, and also an important direction for China's energy structure adjustment and development. Over the past decade, China's onshore wind power and photovoltaic power generation have developed rapidly, and have gradually entered the bidding price/gird parity stage. China's offshore wind power resources are abundant and adjacent to the power load area, which are expected to become the main direction of renewable energy development in the future. However, factors such as high investment, operation and maintenance costs, and immature technology are the main obstacles restricting the offshore wind power development. It is necessary to rationally analyze the current situation and difficulties in China's offshore wind power development, make full use of experiences accumulated in the development of onshore wind power and photovoltaic industry, analyze and consider comprehensively the future development mode of offshore wind power in China.This paper will discuss the necessity of China's offshore wind power development, analyze the current development status and future trends in detail, and finally give some suggestions and opinions on future development.
Tech-economic and carbon emissions analysis of net zero emissions technologies under the background of carbon peaking and carbon neutrality
YANG Yang;YANG Dongtai;ZHANG Chaoqun;LIU Yi;XU Dong;YANG Guangjun;As China progresses towards its carbon neutrality target, the current thermal power industry must not only reduce CO2 emissions but also further evaluate the potential and economic feasibility of various emission reduction technologies to achieve near-zero or even net-zero emissions in the high-emission power sector. This article systematically reviewed four typical emission reduction technologies currently in use: biomass power generation, green ammonia power generation, oxy-fuel power generation, and post-combustion carbon capture. It outlined the technical characteristics and development status of these four paths and analyzes the challenges each technology faces. From a lifecycle perspective, the carbon reduction potential of these four emission reduction technologies were explored.Pursuing a net-zero emission goal, the emission reduction rates of oxy-fuel and post-combustion carbon capture technologies are approximately 60-80%. In contrast, biomass and green ammonia power generation which avoid using fossil fuels at the source and have the lowest carbon emisson. Compared to traditional thermal power plants, the carbon emisson of these two technologies can be reduced by over 90%, indicating significant emission reduction potential.From carbon footprint prespective, considering technological maturity and economic feasibility, green ammonia power generation is currently at a small-scale demonstration stage and remains distant from large-scale commercial applications. The high cost of green ammonia production also results in expensive generation and emission reduction costs for green ammonia plants. Biomass power generation has demonstrated large-scale projects internationally but faces high generation costs due to higher fuel expenses. Oxy-fuel technology still lacks large-scale commercial application projects, indicating relatively lower technological maturity. Post-combustion carbon capture technology has the highest degree of maturity and rich project practical experience, the levelised kWh cost is the lowest, its abatement cost is about 222.7～593.6 yuan/tCO2, which has significant advantages in terms of power generation cost and abatement cost, etc. The levelised kWh cost of biomass power plants is about twice that of traditional thermal power,about 0.68～0.75 yuan/(kW·h), while green ammonia power plants have a significant advantage due to the high cost of Green hydrogen leads to high fuel cost, the levelised kWh cost is about 1.67 yuan/(kW·h) at this stage, with the development of renewable energy and the decrease of green hydrogen cost, the levelised kWh cost of green ammonia plant is expected to be reduced to 0.9 yuan/(kW·h), the post-combustion carbon capture technology shows the highest feasibility and economy among current technologies. In order to achieve the goal of carbon neutrality, the four emission reduction technologies should be promoted in an orderly manner, with priority given to the rapid, large-scale deployment of post-combustion carbon capture, biomass combustion, and other emission reduction technologies with higher technological maturity to achieve rapid carbon reduction in the power sector, while green ammonia combustion and other power generation technologies with stronger and cleaner emission reduction potential should be steadily developed to provide a backstop for the realisation of a zero-carbon footprint for the power sector in the later stages of carbon neutrality.
The research progress and suggestions of desulfurization technology in coal-fired power plants
WANG Wenbiao;XU Yueyang;XUE Jianming;The development course,present situation,and the latest progress of desulfurization technology at home and abroad are systematically analyzed. The study pointed out that there are some prominent problems of the current mainstream technology and facilities,such as high energy consumption,reliability,and economy in the operations,especially concerning the unsustainable development issues. The study reveals that the efficient resource utilization of sulfur is an inevitable trend of desulfurization technology development in the future. Meanwhile,it suggested that the resource of coal desulfurization at fountainhead and the sulfur dioxide-to-resource in flue gas should be developed for sustainable development in the future. In addition,some technologies,including coal desulfurization at the fountainhead,solid-phase adsorption regeneration,liquid-phase absorption regeneration,and chemical process coupling biological engineering,should be developed for the sulfur resources.