Cement kiln coal-burning combustion aid and preparation method thereof

Abstract

The invention discloses a cement kiln fuel coal combustion improver which is prepared from the following raw materials in percentage by mass: 35 to 50 percent of an oxygen producer, 2 to 5 percent of a catalyst, 5 to 8 percent of a sulfur fixing agent, 35 to 48 percent of a combustion improver and 1 to 3 percent of a dispersant, wherein the total percent is equal to 100, and the dispersant is polycarboxylate. The macromolecular dispersant with high chemical stability is used; the cement kiln fuel coal combustion improver does not contain halogen ions of corrosive equipment, can increase the burn-off rate of fuel coal, reduce the carbon residual rate of raw coal and effectively fix sulfur, does not contain elements harmful to a clinker combustion system, is high in safety, cannot be automatically combusted, and is nontoxic and corrosion-free; experimental operation is simple and convenient; the adding amount of the cement kiln fuel coal combustion improver is lower than that of a common fuel coal combustion improver at the same level; the raw materials are low in cost, and the cement kiln fuel coal combustion improver has an extremely high application prospect and can really achieve energy conservation, discharging reduction, environmental protection and pollution prevention.

Description

Technical field [0001] The invention relates to a coal-burning auxiliary agent for cement kilns and a preparation method thereof, in particular to a functional environment-friendly coal-burning auxiliary agent for cement kilns and a preparation method thereof. Background technique [0002] my country is a big coal consumer, coal accounts for about 70% of primary energy consumption. In 2016, coal production reached 3 billion tons, of which about 70% was used for direct combustion or power generation, and the coal used for clinker in cement kilns accounted for a large part. Due to backward combustion technology, incomplete combustion, low combustion efficiency and other reasons, low-quality coal with low energy levels is not used or is wasted because it is rarely used. The problem of energy waste is more serious. In the context of the current global warming and the rising demand for emission reduction, for developing countries, improving energy efficiency and reducing unnecessary ...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN1724621 coal combustion additive, composed of salt combustion aid and quicklime absorbent, only has combustion-supporting catalytic effect, and salt contains a large amount of halogen ions, which is very serious for equipment corrosion

[0004] Chinese patent CN1629262 coal-fired combustion accelerant is composed of chlorate, copper salt and sodium chloride, etc. A large number of halogen ions corrode the combustion equipment and shorten the service life of the equipment.

[0007] Chinese patent CN102191110A coal-fired combustion accelerant consists of chromium trioxide 3%-10%, potassium dichromate and / or sodium dichromate 3%-15%, dolomite powder 20%-30%, dicyclopentadienyl compound 5%-15% of iron, 3%-10% of manganese dioxide, 3%-18% of zinc oxide, 15%-30% of activated clay are compounded and mixed. Although there are many effects, chromium trioxide and dichromic acid The introduction of potassium, a high-valent cadmium heavy metal ion, will pose unpredictable threats to the environment and the lives of humans and animals