A process of using rice husk powder and petroleum coke powder as mixed fuel for calcining white cement rotary kiln

Abstract

A mixed fuel process using rice husk powder and petroleum coke powder as white cement rotary kiln for calcination. The rice husk is crushed into rice husk powder in a pulverizer, and the crushed rice husk powder is sent by the exhaust fan of the petroleum coke grinding system. The suction bag filter is mixed with the petroleum coke powder that enters the bag filter at the same time, and then sent to the mixed fuel bin, and then the mixed fuel is sent to the calciner and the rotary kiln head burner for combustion; the purified gas is produced by The exhaust fan exhausts into the atmosphere through the chimney. The mixed fuel mixed with rice husk powder and petroleum coke powder can reduce the ignition point and embers temperature of the fuel, greatly reduce the phenomenon of incomplete combustion of the fuel, and significantly reduce the calcining heat consumption of white cement clinker. The high calorific value and low ash content of petroleum coke are beneficial to the sintering of white cement clinker, and can avoid iron pollution brought by ash, which is very beneficial to the strength and whiteness of white cement. This process can mix crushed rice husks into petroleum coke powder to make mixed fuel, which is suitable for calcination of white cement clinker in new dry process cement kilns.

Description

technical field [0001] The invention relates to a white cement rotary kiln calcination mixed fuel process, in particular to a white cement rotary kiln calcination mixed fuel process using rice husk powder and petroleum coke powder. Background technique [0002] For a long time, the fuel used for calcining white Portland cement clinker in my country's white cement rotary kiln is bituminous coal. However, the vast southern regions of my country lack high-quality bituminous coal, but there are abundant anthracite reserves. However, due to the high ash content of anthracite, Fe in ash 2 o 3 It will have an adverse effect on the whiteness of cement. Therefore, the selection of white cement calcination fuel has become a difficult problem for white cement enterprises. [0003] Petroleum coke is a coke product obtained by distilling crude oil to separate light and heavy oils, and then transforming heavy oils through thermal cracking and condensation reactions. Most petroleum cokes...

AI Technical Summary

Problems solved by technology

However, petroleum coke used as white cement fuel has the disadvantages of high ignition temperature and embers temperature, and slow combustion speed, especially the combustion conditions in the decomposition furnace of the decomposition kiln outside the kiln are poor, and the raw meal needs to absorb a large amount of heat during the decomposition process of calcium carbonate. The combustion of petroleum coke is very unfavorable. Due to the slow heat release rate and fast heat absorption rate, the temperature in the furnace cannot meet the calcination requirements.

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