The reason why the sulfur content in coke is higher than that in the coal fed into the furnace
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This post was last edited by lflsedin on 2017-4-6 at 22:00. According to the test results from the laboratory, the sulfur content in coke is often higher than that in the coal fed into the furnace. What are the factors responsible for this?
How is sulfur enriched? The test results on a daily and monthly basis show that the sulfur content in coke is generally higher than that in coal.
What is your coking quenching method?
Sulfur in coal is divided into organic sulfur and inorganic sulfur based on its form of existence. Some coals also contain a small amount of elemental sulfur. Sulfur in coal is classified into combustible sulfur and non-combustible sulfur based on its ability to burn in air. Organic sulfur, pyrite sulfur, and elemental sulfur can all burn in air; they are all combustible forms of sulfur. Sulfate sulfur cannot burn in air; it is non-flammable sulfur. The sulfur remaining in coke after coal coking (primarily in the form of organic sulfur, calcium sulfide, and ferrous sulfide) is known as solid sulfur. Sulfur that is released along with gas and tar during coal coking is known as volatile sulfur (primarily in the form of hydrogen sulfide and carbon monoxide sulfide (COS)). The fixed sulfur and volatile sulfur in coal are not constant; they vary depending on factors such as coking temperature, heating rate, and the nature and quantity of mineral components. The total amount of sulfur in various forms in coal is referred to as the total sulfur content of coal (St). Ask whether the chemical plant injects desulfurization liquid into the quenching water
Theoretically, the sulfur content in coke should be lower than that in the coal fed into the furnace. If abnormal data are observed, a thorough investigation is necessary; no hasty conclusions should be drawn. Factors such as the production process, the method of coke quenching, the treatment of desulfurization solutions, as well as sample collection and testing, all need to be considered. Reasons for the inversion of coal quality
1. Has the desulfurization liquid been poured into the coke quenching tank?； 2. Has there been sulfur pollution in the coking quench tank? ； 3. Whether the testing and sampling are carried out in a standardized and accurate manner.
If desulfurization liquid enters the coking quench tank, the appearance of the coke will change significantly. If desulfurization waste liquid is mixed into the coal, it has no significant impact on the sulfur content of the coke either. It is likely still due to testing issues; it is recommended to take samples of each type of coal, blended coal, and coke to nearby factories and mines for comparative testing. It was solved right away.