How is the converter temperature adjusted?

How should the temperatures of multiple converters be adjusted? Also, how to adjust the acetylene excess after single-unit analysis? How to adjust it if there is an excess of hydrogen chloride? 1. The temperatures of multiple converters are regulated using circulating hot water. 2. An excess of acetylene after single-unit analysis indicates that it was already in excess when it entered the mixer. The adjustment is controlled by a regulator valve via a mixer in accordance with the specified ratio. 3. Excess hydrogen chloride is also adjusted using a mixer that feeds into the regulator valve in line with the prescribed ratio

Reply to 2# HANWENSHENG506: Does our hot water system use self-circulation, and can the temperature of the hot water be adjusted?

I will answer your three questions one by one: First, the temperature of the converter is usually adjusted by controlling the opening degree of the material inlet pipe; the heat released during the reaction is the determining factor for the converter’s temperature, while the temperature of the hot water is a secondary factor； Secondly, an excess of acetylene in individual analyses indicates that the catalyst efficiency is very low; the reaction rate of acetylene and hydrogen chloride within the converter is too low, resulting in acetylene passing through the catalyst-filled tubes without reacting ； Both of the above problems are resolved by adjusting the opening degree of the converter inlet valve. Third, the mixed gas in the converter already contains an excess of hydrogen chloride; if this excess is too large, it will lead to material waste and a high temperature in the purification system. As for how to adjust it, the simplest way is to modify the ratio of acetylene to hydrogen chloride.

The cooling medium for the converters in our factory is heptane. Adjusting the temperature involves two aspects: regulating the mixture flow rate and controlling the heptane pressure.

This issue should be discussed in two parts: First, converter temperature control: This is achieved by controlling the flow rate of hot water in the three layers of the converter, as well as the amount of gas that enters the mixer in the converter； Under normal circumstances, the amount of mixed gas entering the converter remains relatively constant, and operators generally adjust the temperature of the converter by making slight adjustments to the flow rate of hot water in the three layers. However, some manufacturers have removed the converter bed temperature and hot water valves, monitoring only the converter outlet temperature. II. Control of the conversion efficiency of the converter: This is influenced by various factors such as the flow rate of the mixed gas entering the converter, the ratio of components in the mixed gas, the duration of catalyst use, and any caking issues. The conversion efficiency needs to be assessed through analytical methods, and based on these data, adjustments can be made to the ratio of components in the mixed gas and the flow rate through each converter. Decisions can also be made regarding whether to replace the catalyst or not.