【Weekly Topic】The issue of nitrogen and arsenic content in coal
Thread Content
“ The nitrogen content in coal determines the NH3 level in gas and gas-water systems, and an excess amount of ammonia in the plant is necessary to reduce corrosion. For coal with too low N content, anti-corrosion measures must be taken and materials must be selected carefully. As can cause permanent poisoning of the conversion catalyst. ”How does everyone approach gasification?
The ammonia nitrogen content in our transformed condensate is over 10,000, which causes the ammonia nitrogen level in the gray water to exceed the allowable limits; we plan to install a denitrification unit soon!
Was it because ammonia wasn’t mentioned during the design, or has the quality of the coal changed?
Arsenic As can cause permanent poisoning of conversion catalysts. ”
Catalysis is still quite targeted in this regard
The amount of shift condensate required is determined based on the pH value of the gray water, and then the quantity of shift condensate is controlled by regulating the liquid level in the stripping tower； To prevent arsenic poisoning of the shift catalyst, a poisoning tank can be added in front of the shift reactor.
How is this As block controlled? It’s already a trace amount
Since our own coal mines are not yet able to produce coal, the coal we use now is all imported! And the type of coal is often changed!