A method for extracting air and heat from a rotary kiln and a rotary kiln system capable of extracting air and heat

Abstract

The invention discloses a method for taking wind and heat from a rotary kiln and a rotary kiln system capable of taking wind and heat. The method for taking wind and heat from the rotary kiln includes the step: taking out heat smoke from the rotary kiln, wherein the heat smoke is taken out from a smoke chamber at the kiln tail of the rotary kiln; delivering the heat smoke taken from the smoke chamber at the kiln tail of the rotary kiln, and / or, applying the heat smoke taken from the smoke chamber at the kiln tail of the rotary kiln to prepare potassic fertilizer or industrial raw material. The rotary kiln system capable of taking wind and heat comprises the rotary kiln; the kiln tail of the rotary kiln is interconnected with a thermal decomposition furnace through the smoke chamber; the outside wall of the smoke chamber at the kiln tail of the rotary kiln is provided with a heat smoke outlet. The method for taking wind and heat from the rotary kiln and the rotary kiln system capable of taking wind and heat can obtain heat smoke at high temperature, and temperature of the heat smoke is from 950 DEG C to 1200 DEG C; it is unnecessary to take a fire coal afterburning furnace as the drying hot source; the method and system can effectively dry the replaceable raw material with big water content, and also can produce high-quality potassic fertilizer.

Description

technical field [0001] The invention relates to a method for extracting air and heat from a cement kiln and a cement kiln system capable of extracting heat from the air, in particular to a method for extracting air and heat from a rotary kiln and a rotary kiln system capable of extracting heat from the air. Background technique [0002] The cement industry is an industry that consumes a lot of resources and energy and pollutes heavily. With the increasing pressure of energy conservation and emission reduction undertaken by our country, it is imperative for the cement industry to transform and upgrade centered on environmental protection and energy conservation. Therefore, the use of alternative raw fuels is a development trend, and the amount of use is increasing, but at the same time, it will also face the problem of high concentrations of harmful elements in alternative raw fuels, especially chloride ions. [0003] In the prior art, the substitute raw materials include th...

AI Technical Summary

Problems solved by technology

High levels of harmful components such as chloride ions in the raw materials will cause crusting and blockage of the rotary kiln system, abnormal kiln operation, and high chloride ion concentration in the clinker, which will affect the quality of the clinker

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