Research And Development On A New Energy-saving And Environmental Protection Gasification Furnace

In recent years, the coal gasification technology is generalized in the whole country, but various coal gasifiers available on the current market not only waste energy but also pollute the environment because of too much carryover (more than 3%), combustible slag fuel up to 13% -15% with the highest more than 20%, and low efficiency (between 70%-80%), also part of the fog tar is precipitated on the dust collector and water seal accompanied with carryover. The author, together with the group members, made a comprehensive analysis on the domestic coal gasifiers and developed a new energy-saving and environmental coal gasifier.1. In this paper, a large number of data about coal gasifiers both at home and abroad is collected and analyzed, from which we realized the urgency and necessity for coal gasifier research and development.Coal gasification is an an important method for the chemical processing and the key to the clean use of coal. Coal gasification technology, especially high-pressure, high-capacity air-bed gasification technology, shows good economic and social benefits, represent the development trendm, is the cleanest coal use technology and the leading and key to clean coal technology. With the increasingly strict environmental standards, the advantages of air-bed gasification become increasingly outstanding.2. The paper makes high temperature gasification kinetics analysis on seven kinds of coal by thermogravimetric analysis method, and thermogravimetric analysis experimental data is mathematic processed by Coats-Redfern integral method and get high temperature reaction kinetic parameters, and makes analysis on the the factors that impact high-temperature gas dynamics. Through analysis we can arrive at weight loss difference of the coal in O2 and CO2 environment respectively during temperature-programmed process.3. New energy-saving and environmental coal gasifier adopts a new design concept that can bring out a significant reduction in carryover and improve the thermal efficiency of gasifier. In order to achieve this objective, a uniformly distributed gradient wind technology is developed so that the velocity and temperature of airflow at the same cross-section is uniformly distributed.The upper air volume above the grate of this new energy-saving and environmental coal gasifier is <25%, and most of the air flow passes through from the bottom with combustible slag fuel <5%, which is lower than the value of porduct from any other manufacturer available on the market. At the same time to save energy, coal emissions meet with the national emission standards defined for region of class 1. The equipment has a very promising application prospect.