This project belongs to one of the key points in the field of clean coal technology (gas purification technology field).
Coal gasification combined cycle power generation (IGCC), coal gasification fuel cells (MCFC) and pressurized fluidized bed combustion combined cycle power generation (PFBC-CC) are new generation clean power generation technologies with high efficiency and low pollution under development. These technologies are known as the most attractive power generation technologies of the 21st century, and high-temperature gas purification is one of the key links in realizing these technologies.
The high-temperature gas (or gas) obtained from coal gasification (or combustion) contains small amounts of HCl and alkali metal vapor pollutants. Although these pollutants are low in content, they are extremely harmful. Therefore, removing the above pollutants at high temperatures can not only basically eliminate pollution to the environment and avoid corrosion of key equipment, but also improve the overall efficiency of the technology and bring the level of high-temperature gas purification technology to a new height. Based on the above purposes, this project has successfully developed technologies suitable for the removal of HCl and alkali metals in high-temperature gas, and has been successfully applied in the coal chemical, power and petrochemical industries. Key technological innovations are as follows:
(1)In terms of HCl removal technology in coal gas (or gas), most of the dechlorinating agents used at home and abroad are impregnated with active components on porous carriers. Their chlorine capacity is not high, but the cost is high; some models of dechlorinating agents have a high degree of purification, but their use temperature is relatively low, and they are medium or room temperature dechlorinating agents. In response to the above problems, this project broke through the previous bottleneck and successfully developed a high-temperature dechlorination agent with excellent performance. The dechlorination agent developed in this project has the characteristics of low cost, high purification, large chlorine capacity and wide use temperature range. It is very suitable for the removal of HCl in high-temperature gas, filling the gap in high-temperature gas dechlorination technology at home and abroad.
(2)In terms of alkali metal removal technology in high-temperature gas (or gas), some research has been carried out abroad, but there is almost no domestic research. On the basis of investigating the mechanism of alkali metal precipitation, this project successfully developed an alkali metal adsorbent for the first time. It has the characteristics of extensive raw materials, simple preparation process and excellent adsorption performance. It is suitable for the removal of alkali metals from high-temperature gas, filling the gap in domestic alkali metal removal technology in high-temperature gas.
(3)Regarding HCl and alkali metal removal technologies at high temperatures, there is no industrial application device in this area abroad, and there is almost a blank in China. Through research on process influencing factors, adsorption mechanism and kinetics, this project established relevant models of the basic process parameters of high-temperature gas dechlorination and alkali metal removal processes, and successfully implemented the high-temperature dechlorination agent and alkali metal remover developed in this project. Industrial production and application. In addition, the relevant results of this project have verified and enriched the relevant basic theories of high-temperature purification systems, and have important practical significance for the development of high-temperature purification application technologies.
This project technology has the characteristics of strong applicability, simple process, good removal effect, and low cost. It can not only be used in coal gasification combined cycle power generation (IGCC), coal gasification fuel cells (MCFC) and pressurized fluidized bed combustion combined cycle power generation (PFBC-CC), but also can be widely used in other fields related to high-temperature gas purification. The main research results of this project have obtained 4 invention patents, filling some domestic and foreign technological gaps, and the overall technical level has reached international advanced. It has been produced and industrially applied in many enterprises in Jiangsu, Shanghai, Hebei, Inner Mongolia and other places, promoting the development and technological progress of gas purification and related fields. The technology of this project is in line with national industrial policies and environmental protection policies, and has significant economic, environmental and social benefits. In the past three years, the company has added a total of 180 million yuan in new output value, 16.2 million yuan in new profits and taxes, and approximately 16.48 million yuan in new tax revenue.