Biomass combustion utilizing method used for butted boiler and heat exchanger

Abstract

A biomass combustion utilizing method used for a butted boiler and a heat exchanger comprises the following steps: (1), preliminary pyrolysis; (2), feeding combustion; and (3) water vapor combustion support. A biomass raw material is subjected to preliminary pyrolysis to precipitate tar oil to obtain biomass fuel with low tar oil content, so that the condition that combustion coking in a furnace chamber is effectively prevented, the frequency of slag removal by blowing down is effectively reduced, the work efficiency is improved, and the service life of equipment is prolonged; meanwhile, a vapor generator is used for spraying water vapor into the furnace chamber so as to support combustion; and experiments prove that the temperature of a flame in a fire hole of a common biomass combustion machine is lower than 800 DEG C, and the temperature of the flame in the fire hole with introduced water vapor is about 100 DEG C higher than that of the flame in the fire hole without introduced water vapor under the condition of the same feeding amount and the same ventilation amount. The combustion flame is ejected out through the fire hole, is used for heating the butted boiler, the heat exchanger, a heat supply system, a heat generator and other thermal utilization equipment, is not limited to boiler heating, and can be extensively applied to various equipment with naked fire heating requirements.

Description

technical field [0001] The invention relates to a combustion method, in particular to a biomass combustion utilization method for connecting boilers and heat exchangers. Background technique [0002] Biomass fuel, as an important direction of new energy development, has received more and more attention. It is mostly obtained from stem crops through processing. Generally, the dry basis of biomass burning has a water content of less than 10%~15%, an ash content of less than 1.5%, a sulfur content and a chlorine content of less than 0.05%, and a nitrogen content of less than 0.5%. It is an ideal renewable energy source with a wide range of sources. It can be derived from industrial, agricultural, forest and domestic waste. In the world's current energy consumption, biomass fuel consumption accounts for about 14% of the world's total energy consumption, while in developing countries, biomass fuel (mainly corn, wheat, rice straw, rice husk, straw, wood, etc.) The larger proport...

AI Technical Summary

Problems solved by technology

However, the traditional biomass burner is easy to coke, block the pipes, accumulate in the lower part of the furnace and block the screen under the furnace during the combustion process, so that it needs to stop the furnace frequently to clear the slag and re-ignite, and cannot work continuously and stably

This kind of biomass combustion utilization method has problems such as easy coking in the biomass burner, low combustion utilization efficiency and discontinuous stability.

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