Why is sulfur-containing wastewater used as a terminator in catalytic cracking units?
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Our device now uses sulfur-containing wastewater as a terminator. What are the advantages and disadvantages of using sulfur-containing wastewater as a terminator? Why is sulfur-containing wastewater used as a terminator?
We use gasoline as a terminator to reduce sulfur content; what are the advantages of using sulfur-containing wastewater as a terminator?
This post was last edited by wyt1234 on 2010-10-12 at 14:49. Sulfur-containing wastewater is used as a terminator to control the temperature of the mixture of agent and oil in the lift pipe. 1. Improve the heavy oil cracking capacity and reaction conversion rate. 2. It can improve product distribution. The yields of liquid hydrocarbons and gasoline increase, while the yields of light diesel and slurry decrease; the coke yield is high. 3. It can increase the octane number of catalyzed gasoline. 4. Using sulfur-containing wastewater as a terminator can reduce wastewater discharge. 5. The alkaline nature of sulfur-containing wastewater has an impact on the catalyst. 6. Reusing sulfur-containing wastewater may increase the sulfur content in the product.
The terminator is injected into the upper part of the lift column; its main function is to lower the temperature there and prevent secondary reactions, thereby improving the product distribution. As for the medium to be used as a terminator, it can be chosen based on the conditions of one’s own setup; generally, crude gasoline, light diesel, top-cycle reflux, and sulfur-containing wastewater can all serve to absorb heat during vaporization. It should be noted that the use of a terminator increases the load on the pneumatic press; it cannot be used when the press is operating at full capacity. Energy consumption also needs to be taken into consideration.
Um… what was said upstairs was great! Agree, agree! We use gasoline and acidic water as terminators; when the pressure pump has sufficient processing capacity, using acidic water as a terminator helps save energy, reduce consumption, and decrease wastewater discharge. Now, we only use acidic water.
Using gasoline as a terminator, especially self-produced crude gasoline, is not worth the cost. Because the reprocessing of gasoline generates some dry gas and coke, resulting in a loss in liquid yield. Using acidic water as a terminator not only helps to increase the agent-oil ratio and enhance the conversion of heavy oil, but also improves the yield of gasoline compared to using gasoline as a terminator. Given the current low production of liquefied gas, acidic water is the most suitable option.
Generally, quenching agents can be divided into: acidic water, crude gasoline, deionized water, and dirty oil. Acidic water: Used as a terminator; wastewater decreases after circulation, sulfur content increases, and the catalyst is affected. Crude gasoline: increases coking amount, reduces yield, increases the load on the compressor, and raises the volume of dry gas and liquefied gas.