Prediction method for flow temperature of mixed coal liquid slag based on raw coal ash components

Abstract

The invention discloses a method for predicting the flowing temperature of mixed coal liquid slag based on raw coal ash components, which can be used for predicting the flowing temperature of the liquid slag as a key index of the mixed coal combusted in a liquid slag discharging boiler and preliminarily judging whether the mixed coal obtained by a blending scheme can meet the normal slag discharging requirement of liquid slag discharging or not. The danger of unsmooth slag flowing and even slag blocking caused by over-high flowing temperature of the blended mixed coal ash slag is prevented. The liquid ash flowing temperature index obtained through calculation can be used for optimizing and adjusting a coal blending scheme of the liquid slagging boiler, the making efficiency of the coal blending and combustion scheme is improved, the adaptability of the liquid slagging boiler to fuel market changes is improved, and the coal type application range is widened; the operation economy and the operation reliability of the boiler are integrally improved.

Description

technical field [0001] The invention belongs to the technical field of coal-fired liquid slag discharge boilers, and in particular relates to a method for predicting the flow temperature of mixed coal liquid slag based on raw coal ash components. Background technique [0002] Liquid slagging boilers have important applications in the fields of coal-fired power generation and coal chemical industry in my country, and are an important technical means for the development and utilization of coal-fired coal with a low ash melting point. The liquid slag discharge boiler mainly uses the thermal environment generated by combustion to melt the ash and slag, and then discharges the liquid slag from the furnace through the slag discharge channel, so as to realize the solidification and collection of the combustion by-product slag. The melting characteristics of slag in this process, especially the flow temperature of molten liquid ash, have an important influence on the process of liqu...

AI Technical Summary

Problems solved by technology

On the conventional solid-state slagging boiler, through direct test firing and then observing the rationality of the blending method, in the actual blending process of the liquid slagging boiler, it is very easy to cause poor slag flow during the combustion process of the mixed coal, resulting in Blockage of slag discharge, causing failure of the unit and shutdown of the furnace

On the other hand, after configuring mixed samples of potential blended coal types, the ash melting point experiment is carried out separately, and the method of testing the flow temperature of the mixed coal liquid ash not only requires a lot of manpower, material and financial resources for sampling, sample preparation, and experimental testing. consumes a lot of time

In view of the actual situation of rapid changes in coal sources in the current coal market, the experimental test method has exposed many problems such as the poor adaptability of the liquid slagging boiler to the coal market, the strong lag of test results, and the high cost of the test.

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