Biomass fluid bed combustion device and combustion method

Abstract

The present invention discloses a biomass fluidized-bed device and the method, the device includes a burning reactor equipped with at least one air inlet and a smoke gas outlet and a pyrolytic gasifying reactor which is connected with the burning reactor through pyrolytic gas connecting pipes and refeed connecting pipes, the pyrolytic gas connecting pipes are inserted into the upper or the middle of burning reactor, refeed connecting pipes are inserted into the lower of burning reactor, the pyrolytic gasifying reactor is also equipped with a gas inlet and a feeding mouth; the method is: first transmitting the biomass and addition agent into pyrolytic gasifying reactor to pyrolytic gasifying and generating carbonization pyrolytic gas; second transmitting the reacted pyrolytic gas into the dilute phase burning zone of burning reactor, transmitting the carbonization biomass into the dense phase burning zone of burning reactor to burn, the reacting temperature in pyrolytic gasifying reactor is 400-800deg.C and the reacting temperature in burning reactor is 600 -950deg.C, the method in the invention has characteristics of highly effective burning and effective preventing of base metal corrosion during the burning process.

Description

technical field [0001] The invention relates to a biomass combustion device and method, in particular to a circulating fluidized bed combustion device and a combustion method for effectively suppressing alkali metal corrosion in the biomass combustion process. Background technique [0002] my country is rich in biomass resources, but fossil energy is in short supply. In the 21st century, it will face the dual pressure of economic growth and environmental protection. Therefore, the development of biomass energy combustion and utilization technology is crucial to the establishment of a sustainable energy system and the promotion of the development of the national economy. and environmental protection are of great significance. [0003] In recent years, with the increasingly widespread application of biomass combustion gasification power generation, fluidized bed technology is one of the main technical approaches for efficient biomass combustion, but various problems have also b...

AI Technical Summary

Problems solved by technology

[0003] In recent years, with the increasingly widespread application of biomass combustion gasification power generation, fluidized bed technology is one of the main technical approaches for efficient biomass combustion, but various problems have also been encountered in the application of biomass fluidized bed combustion technology, such as solid incomplete Increased combustion loss, ash agglomeration, slagging and deposition due to low ash melting point, and alkali metal corrosion of metal equipment caused by biomass combustion are becoming more and more prominent

Although domestic and foreign are actively exploring to solve the problems of alkali metal deposition and corrosion in the process of biomass combustion, some methods to alleviate the problem of alkali metals have been proposed, including the use of additives, selection of suitable bed materials, removal of alkali metals before combustion, and the treatment of boilers. Optimizing the design, adjusting the combustion conditions, etc., but there is still no effective method to solve the deposition and corrosion problems in different biomass combustion processes, which brings great difficulties to the long-term stable and safe operation of commercial biomass combustion power generation equipment

Images