Biomass low-temperature pre-burning low-volatile inferior coal low-NOx combustion device

Abstract

The invention discloses a biomass low-temperature pre-burning low-volatile inferior coal low-NOx combustion device. The combustion device utilizes biomass to substitute high-price high-quality fuel gas as pre-burning fuel, the biomass is partially combusted in a combustion chamber so as to provide heat for the combustion chamber, and the combustion temperature is maintained at about 800 DEG C. The biomass is pyrolyzed at the temperature of about 800 DEG C, part of the volatile component generated by virtue of the pyrolysis is combusted, and part of the volatile component enters a hearth to be combusted. The low-volatile inferior coal is heated to 650 to 800 DEG C in a preheating chamber, so that the combustion stability of the low-volatile inferior coal in the hearth can be improved. By adopting the combustion device, the emission amount of CO2 and NOx can be reduced, and contribution can be made for alleviating the global warming and reduction of acid rain, photochemical smog and haze caused by the greenhouse effect. Finally, the combustion performance of the low-volatile inferior coal can be improved, the combustion efficiency can be improved, the contribution is made for the increasing of the economic benefit, and the saving of the energy for enterprises.

Description

technical field [0001] The invention belongs to the technical field of thermal energy and power engineering, and relates to a combustion device, in particular to a biomass low-temperature pre-combustion low-volatile low-quality coal low-NO x Burning device. Background technique [0002] Biomass energy is a renewable energy source. It has a wide distribution range and a large output. It is estimated that the dry weight of biomass grown every year can reach 140 billion to 180 billion tons. However, currently the biomass used as energy is less than 1% of the total, so the application potential of biomass is very huge. During the combustion of biomass, CO is also produced 2 , but a large amount of CO has been absorbed in the process of its formation 2 , burning biomass for the total atmospheric CO 2 No contribution to the increase of , while the application of biomass instead of fossil fuels can effectively reduce CO 2 emission. [0003] my country is a country with coal ...

AI Technical Summary

Problems solved by technology

At present, it is generally difficult to ignite boilers burning low-volatility and low-quality coal, and NO x High emission characteristics

[0004] NO x It is one of the culprits that caused large-scale smog in recent years. In addition, NO x It will also induce a series of environmental problems such as photochemical smog and acid rain, and coal-fired boilers are my country's NO x One of the most important sources of emissions, dust and SO x Pollution control has achieved great results, but NO x Emission control is still relatively backward

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