Process and device for co-production of active lime from natural gas and biomass fuel

Abstract

The invention discloses a process and a device for co-production of active lime from natural gas and biomass fuel, and aims to solve the problems in the prior art that mixed combustion of high-calorific-value fuel gas and low-calorific-value fuel gas cannot be used and solid powder fuel cannot be injected when lime is produced by a single-hearth shaft furnace. Through combined application of the in-furnace central combustion device arranged inside the furnace body and the out-furnace combustion device arranged outside the furnace body, the purpose of producing active lime by combusting three clean fuels, namely natural gas fuel, biomass gas fuel and biomass powder fuel in the same hearth is achieved, the structure is simple, practical and compact, and the combustion efficiency is improved. The calcining time is short, the production efficiency is high, the yield is high, the product quality is good, the economy is good, and the production cost is low; in addition, the purposes of replacing mineral fuel with clean energy and deeply utilizing biomass fuel are achieved; meanwhile, the emission of pollutants and carbon dioxide is greatly reduced, and the method has important significance in the aspects of reducing pollution and carbon, improving the ecological environment, guaranteeing the national energy safety and the like.

Description

technical field [0001] The application relates to the technical field of lime production from lime kilns, in particular to a process and device for co-producing active lime with natural gas and biomass fuel. Background technique [0002] my country's traditional lime burning uses solid fuels such as coal and coke. At present, about 80% of my country's lime production capacity is still produced by solid fuels such as coal. my country's ecological and environmental protection has entered a new stage of collaborative management of pollution reduction and carbon reduction. The process of using coal to produce lime has been strictly restricted and prohibited. In particular, the construction of mixed shaft kilns using solid coal fuel is no longer allowed. Moreover, it is important that, from the current coal price in my country, there is no cost advantage to use coal to produce lime. Therefore, how to choose the energy structure of lime production enterprises has restricted the k...

AI Technical Summary

Problems solved by technology

[0010] For this reason, the application provides a process and device for co-producing active lime with natural gas and biomass fuel, so as to solve the problem that the single-chamber shaft furnace in the prior art cannot use mixed combustion of high-calorific-value gas and low-calorific-value gas, and cannot be sprayed. Blowing solid powder fuel, and the problems of low safety, long calcination time, low output and high energy consumption

Images