Carbon deposition issue in quench towers
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Due to an insufficient amount of acidic gas, some of the gas is burned in order to maintain the temperature of the sulfur production furnace. It has been observed that the filters in the quench tower become clogged with carbon deposits after operating for a certain period of time; over time, this could lead to carbon deposition in the beds of the converter and hydrogenation reactors. What measures can be taken to reduce this problem of carbon deposition?
Carbon analysis is caused by the incomplete combustion of hydrocarbons; try adjusting the air supply!
Increase the air supply to ensure complete combustion of the gas
1. It would be better if it switched to burning natural gas or hydrogen. 2. Ensure proper air distribution; provide more air as long as the hydrogenation reactor does not overheat. 3. Closely monitor the filter at the inlet of the quench tower bottom pump, the differential pressure of the quench water filter, as well as the tower differential pressure, to prevent the exhaust system from being shut down due to high tower differential pressure.
Adjust the air-gas ratio after analyzing the recent fuel gas composition to ensure proper equivalent combustion. At the same time, regularly monitor the quality of the quench water and enhance replacement.
Analyze the sulfur content of the fuel gas, and inject steam appropriately to reduce carbon deposition
Consider using hydrogen as a co-firing fuel in the sulfur furnace.
1 Use natural gas or hydrogen. 2 Employ central feeding. 3 Oxygen enrichment can be considered