Flaming system of ardealite calcinator

Abstract

The invention relates to a flaming system of an ardealite calcinator and belongs to the field of ardealite calcination, wherein the flaming system comprises a Raymond mill, a conveying device, a quantitative conveying device, a pulverized coal conveying pipeline, a coal injection machine, an air-coal mixing conveying pipe and a flaming furnace. The Raymond mill is arranged at the front end of theconveying device and can provide high-fine pulverized coal; a discharge port of the Raymond mill is connected with a feed port of the conveying device; the conveying device is arranged between the Raymond mill and the quantitative conveying device; the flaming system has the characteristics of being capable of adjusting flaming intensity, complete in pulverized coal burning and capable of saving fire coal.

Description

technical field [0001] The invention belongs to the field of phosphogypsum calcining, in particular to a flame injection system of a phosphogypsum calcining furnace. Background technique [0002] Phosphogypsum calcination is to convert dihydrate gypsum in phosphogypsum into hemihydrate gypsum. Hemihydrate gypsum can be used as a gypsum building material to realize the reuse of phosphogypsum waste. With the advancement of phosphogypsum calcination technology, its calcination equipment also At present, most phosphogypsum calciners use double-drum calciners for calcination, and most of the phosphogypsum calciners use coal or gas for direct fire supply. Since the cost of gas use is much higher than that of coal, most of them still use coal for heating. Calcination of phosphogypsum with heat; With the strengthening of the national ecological environment protection policy, the environmental protection pressure of various enterprises is also increasing. Coal combustion efficiency a...

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Problems solved by technology

[0002] Phosphogypsum calcination is to convert dihydrate gypsum in phosphogypsum into hemihydrate gypsum. Hemihydrate gypsum can be used as a gypsum building material to realize the reuse of phosphogypsum waste. With the advancement of phosphogypsum calcination technology, its calcination equipment also At present, most phosphogypsum calciners use double-drum calciners for calcination, and most of the phosphogypsum calciners use coal or gas for direct fire supply. Since the cost of gas use is much higher than that of coal, most of them still use coal for heating. Calcination of phosphogypsum with heat; With the strengthening of the national ecological environment protection policy, the environmental protection pressure of various enterprises is also increasing. Coal combustion efficiency and exhaust emissions after combustion have become two key indicators of coal-fired heating, affecting The main factor of this indicator is the coal supply device. The core of the coal supply device is the crushing device and the supply device. The crushing device mostly adopts the mature ore crushing principle. There are two traditional ways of supplying the device: one is the Rhodes blower; the other One is a pulverized coal machine. The disadvantage of these two traditional devices is that the Rhodes blower relies on the negative pressure of the Rhodes blower and the accelerator to send coal. Although the output of coal delivery is high, the wind and coal are mixed unevenly. Inhomogeneous mixing of wind and coal will lead to dense coal powder clusters, resulting in insufficient oxygen supply and incomplete combustion. The macroscopic phenomenon is that the Hegman coefficient is high, and a large amount of carbon monoxide appears in the exhaust gas detection. Secondly, due to the high wind pressure of the Rhodes blower, it is easy to appear The flame failure in the combustion process, and it is difficult to ignite, pollutes the environment. The pulverized coal machine avoids the shortcomings of the Rhodes blower, but the pulverization efficiency of coal is low, the coal powder particles are large, and the sieving rate cannot be controlled, which directly affects the combustion efficiency. Macroscopic phenomenon The Hegman coefficient is high, and a large amount of carbon monoxide appears in the exhaust gas detection. The common point of these two devices is that the combustion efficiency is not high, the exhaust emission after combustion is large, and the environmental protection is not up to standard

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