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Cost estimation and prediction of CO2 and hydrogenated to green methanol
SHU Bin;FAN Maolin;XIONG Jian;Chongqing Yuanda Air Pollution Control Franchise Co., Ltd.;Chongqing Carbon Capture and Utilization Technology Innovation Center;CO2 hydrogenation to green methanol is an important technology choice in carbon capture, storage and utilization technology. In order to predict the development trend of this technology, the project of CO2 hydrogenation to green methanol with an annual output of 100,000 tons was taken as the research object. Based on the calculation and analysis of the production cost and cost composition of CO2 hydrogenation to green methanol, the cost development trend of CO2 hydrogenation to green methanol was further predicted by Aspen Plus simulation calculation method.The results show that under the main economic indicators of 0.3 yuan/(kW·h) green electricity and 320 yuan/t CO2, the production cost of CO2 hydrogenation to green methanol is close to 3 950 yuan/t. In the next five years, the prices of green electricity and CO2 will be reduced to CNY 0.1/(kW·h) and CNY 200/t respectively. At the same time, considering the process optimization brought by the progress of methanol synthesis catalytic technology, the production cost of CO2 hydrogenation to green methanol can be reduced to CNY 1 618/t, which is 59 % lower than the current level. The technology of CO2 hydrogenation to green methanol will mainly reflect the cost advantage and competitiveness with the decrease of green electricity price, and promote the green transformation of methanol industry.
Research process of low-temperature SCR catalysts
In recent years,Selective Catalytic Reduction(SCR) of NO by NH3 at low temperatures has received much attention because of the longer life of catalysts used and lower investment for the control of NOx emission.The research results indicate that the activity of catalysts is related to not only the composition but also the structure and preparation method.The activity of low-temperature SCR catalysts is sufficient for the use of catalysts.The present work aims to present the research process of low-temperature SCR catalysts,in order to give information for the further research of low-temperature SCR catalysts.
Analysis on design and operation of the absorber system in wet FGD plant
The design of the absorber system in the wet limestone/gypsum flue gas desulfurization (FGD) system in Lianzhou Power Plant that includes the diagram flow equipment,inner structure and anticorrosion measures,is described.The operation situation of the system is also introduced.
Capture technology of carbon dioxide in clue gases from power plant
MA Suang-chen,SUN Yun-xue,Ma Jing-xiang,et alThrough analyzing and comparing the principles of traditional MEA and ECO2 technologies as well as their expenses,it can be discovered that ECO2 technology is more suitable to recycle CO2 as its low cost and high efficiency and it has widespread application prospect.
The capability of precipitator dust removal analysis
GUO Jiangyuan;With the deeply developement of industrialization in recent years, the pollution problem is becoming more and more serious, the state gradually increase the intensity for environmental governance. Take the Coal-fired power plant dust pollution for example, GB 13223-1996 provides dust emission concentration must be below 200mg/m3 if the coal-fired power plant is new, expansion or reconstruction,for the GB 13223-2003, this standard increased to 50mg/m3, and now the GB 13223-2011 has reached 30mg/m3. With the increase of emission requirements, a variety of dust treatment facilities have been rapidly development. electric precipitator, bag dust filter and electrostatic fabric filter as a representative of them. The electrostatic precipitator has a long history and also is a mature technology, can remove more dust, can be used for high temperature, high pressure and high humidity occasions. It has small resistance and low maintenance costs, is a very common means of dust removel. But it also has some disadvantages, large area is needed, easily affected by specific resistance and many more. For the bag dust filter, it has high dust collection efficiency. However, due to the need of frequent replacement and maintenance, the maintenance costs of it are still very high, the developement of it is limited. Electric and bag compound dust collector efficiency is higher than the electrostatic precipitator, and investment costs is relatively low, is also a very effective means. At the same time, due to various problems of different precipitator, it also need to improve constantly in the future development.
Application of electrochemistry technology in environmental protection
The electrochemical technology because of its own characteristics and advantages,plays an important role in environmental protection.It mainly discusses and researches the application of electrochemical technology in treating environmental pollutants and monitoring environment.
Flue gas desulphurization technology and its application in coal-fired power generation of China
China's energy structure determines that the coal- fired power generation is important in the electricity supplying,and SO 2 from power generation is the major source of environmental pollution. Flue gas desulfurization( FGD) is a significant technique to control the SO 2 discharge of industrial enterprises that consume coal. With advantages of high efficient,better stability and low cost,FGD technology is widely used in the practice. In this paper,several techniques for FGD in coal- fired power generation are summarized,including the classification of flue gas desulphurization technology,as well as several major wet,dry,semi- dry FGD technologies. In addition,the main characteristics of the different FGD technology are also briefly reviewed,and the selection principles of FGD technology are listed in the process of building a new power plant. Finally,several issues are discussed on the development and application of FGD technology with the actual conditions of China.
Present situation of research on Absorbent for NOx removal in WFGD system
QIAO Hui-ping,YANG LiuTechnologies with the different kind of Absorbents for NOx removal in simultaneous desulfurization and denitrification in WFGD system were reviewed,including NaClO2,H2 O2,KMnO4,Fe(Ⅱ)EDTA,cobalt chelates and urea and(NH4)2SO3.The characteristics and deficiency of the different Absorbents had been analyzed,and the application future of each Absorbent also been forecasted.
Design of FGD mist eliminator
The principle of FGD mist eliminators and the characteristics of some of them in common use are analyzed.Combining the experiences in the design of the mist eliminator abroad and home,the author has summarized the problems should take care in its design and operation
Discussion on wet ESP technology and its application prospect in coal-fired power plants
ZHAO Qin-xia,CHEN Zhao-mei,ZHOU Chao-jiong,et alWet electrostatic precipitation can be used to control PM2.5,acid mists,aerosol,sub-micron particulate,mercury,heavy metals and dioxins/furans as the final polishing device within an multi-pollutant air pollution.The working mechanism,technology characteristics,configurations and some design manner of wet ESPs were described.The application prospect of wet ESPs in coal-fired power plants was proposed.