What are the reasons for air entrainment in the transportation of soda ash finished products using buried scraper conveyors?
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The packaging of finished products in our factory has always been rather unstable. A few days ago, there was severe scaling on the four walls of the alkali silo; as a result, the augers of the automatic weighing and discharging system got jammed frequently. At first, it was suspected that the rehydration was caused by the alkali having been stored in the alkali storage area for too long. A few days ago, packaging was done in tons – long tubes were attached to the finished scrapers, and the items were packaged in bags with a capacity of one ton. Yesterday, when I went to the packaging area, I noticed that occasionally gas was released as the workers loaded the materials. There’s also a lot of pressure, causing the finished alkali to spray everywhere. So I wonder if the scarring on the alkali tank is related to air in the scraper belt? What are the common causes of air in the scraper belt? I kindly ask fellow travelers to share their insights.
One possible reason is incomplete calcination; further decomposition occurs during transportation, resulting in air being present in the scraper.
But how can one determine that the calcination is incomplete? Our alkali output temperature is generally kept around 150–160°C. Where to take samples for analysis?
If your calcination furnace is over 3 meters in length, then the temperature at which the alkali is released is a bit low. A low temperature for alkali release results in incomplete decomposition of the soda ash. You can take samples from the point where the alkali is released from the calcination furnace or from the scraper area, and analyze them to determine the sodium carbonate content in the soda ash.
A dust removal device is installed on the scraper; both wet and dry methods can be used. This is the best method.
Just add a simple tracheal extubation, right?
It’s definitely not possible to pull the trachea out using light – it would pollute the atmosphere. The alkaline dust in the exhaust gases needs to be collected.
Pulling the gas duct doesn’t mean allowing it to vent directly, but rather drawing it into a dust removal or washing system, such as the inlet of a flue gas scrubber. In fact, I think it’s more or less the same as what I told you.
It enters the inlet of the furnace gas scrubber, affecting the concentration of the furnace gas; it would be ideal if it could enter the inlet for heavy ash dust removal instead.
This post was last edited by mkp369 on 2013-12-18 at 16:58; the possibility of incomplete firing is high.
Complete calcination is highly unlikely; the calcination furnace cannot maintain the temperature at which the alkali is released at too high a level, and energy consumption also needs to be taken into account. Within the transportation equipment, further reactions continue to occur, with ammonia and carbon dioxide present in the alkali, which results in vapor formation in the transportation equipment. Especially when the temperature at which the alkali is released is kept low, the total alkali content in the sample analyzed still remains above 99.2%, meeting the requirements for premium quality.