There are a few indicators I’d like to ask everyone about
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I want to know the relationship between the moisture content of the coal fed into the furnace and the gas consumption, as well as the relationship between moisture content and coking time. For example, if the moisture content of the coal drops from 14% to 11%, and the coking time is 24 hours, how does the coking time change after the moisture content decreases? How should the coking time be determined?
I read it in a book; roughly speaking, if the heating conditions remain unchanged, an increase in moisture to 1% results in a 2-hour extension of the coking time. However, this time varies depending on the type of coal – these are just approximate figures.
When the moisture content of the coal blend increases by 1% (when it is above 6%), the standard temperature rises by 5–7 degrees accordingly.
Is there an upper limit for the moisture content of furnace coal? I mean, if the moisture content of the furnace coal is high, can it still be dried distilled properly?
The coking time is determined based on factors such as the type of coke oven, the number of holes, and the production volume of the coking plant； The main energy waste occurs as a result of changes in the moisture content of the coal blend; for each 1% increase in the moisture content of the coal blend (when it is above 6%), the standard temperature increases by 5–7 degrees. However, the moisture level must be controlled: it is generally around 10% for top-loading, and 9.5–11% for tamping. This post was last edited by goudan020 on 2009-3-12 23:42]
The moisture content of coal fed into top-mounted coke ovens is generally 8–10%, while it is around 10–11% in rammed-charge ovens
This can be estimated using an empirical value: for every one percent increase in moisture, the operating time of the coke oven is extended by about 15–20 minutes
I think this kind of LZ approach is not realistic, because the moisture content of coal varies greatly, while it is essential to keep the turnaround time stable. If adjustment is needed, only the temperature can be increased or decreased (by adjusting the gas flow rate). Additionally, the turnaround time corresponds to the coking capacity, in other words, the profitability of the coking plant. It cannot be changed arbitrarily. This post was last edited by Jin Yusi on 2009-3-12 at 12:44.]
In October 2007, it rained in Shanxi for over 20 days in a row. We stored coal in the open air, so the moisture content of the coal was very high; moreover, we produced compacted coke, and production was extremely difficult during that period. However, by adjusting the gas volume, no issues arose with the quality of the coke.
10% plus 5°; over 10% plus 7°.
When the moisture content of the blended coal increases by 1%, the standard temperature rises by 5 to 7 degrees. In response to changes in the moisture content of the blended coal, it is necessary to adjust the furnace temperature rather than changing the coking time. As mentioned on the 8th floor, a coking plant will not change its coking time unless there is a special reason; after all, companies strive to maximize their profits.