Hydrogen chloride synthesis furnace ignition burner

How many layers of lamp bases are you using now? How is it being used?

I think it’s still a matter of whether the burning is sufficient; with three layers, the burning will be more thorough than with two layers.

This post was last edited by Wang Genrong on 2016-11-7 at 13:51. It cannot be said outright whether a 2-layer lamp head or a 3-layer one is better; generally, for synthetic furnaces with a graphite furnace inner diameter of less than 800 mm, a 2-layer lamp head is suitable, while for those with an inner diameter greater than 800 mm, a 3-layer lamp head is preferable. The synthesis furnace lamp holder is commonly known as a burner, and its material is usually quartz. The burner is a key component in the combustion reaction of chlorine and hydrogen to produce hydrogen chloride; the quality of the burner’s design directly affects the quality of the hydrogen chloride produced as well as the safety of the system. The control range for the feed gas ratio Cl2/H2 (molar ratio) in hydrogen chloride synthesis is 1/1.05 to 1.1, meaning that hydrogen is present in an excess of 5% to 10% (by volume). During the reaction process, it is essential to ensure that there is a complete hydrogen-rich layer surrounding the flame; this is necessary to ensure thorough combustion of chlorine, reduce the emission of free chlorine, and maintain acceptable levels of free chlorine in the hydrogen chloride product. Therefore, it is clearly inappropriate to use three layers of burner elements in small synthesis furnaces with a graphite furnace inner diameter of less than 800 mm, or in micro synthesis furnaces with a graphite furnace inner diameter of less than 400 mm. Since the production capacity of such furnaces is low, the hydrogen-rich layer surrounding the flame is very thin. Introducing additional hydrogen into the central area of the flame will only further compromise the integrity of this hydrogen-rich layer, which is detrimental to improving product quality. When synthetic furnaces with an inner diameter greater than 800 mm use a 3-layer lamp head, it helps to reduce the flame height and minimize the impact of high temperatures on the furnace roof. Additionally, due to the high gas flow rate, introducing some hydrogen into the central area of the flame has a relatively minor effect on the integrity of the hydrogen-rich layer surrounding the flame. Nevertheless, when large synthetic furnaces use a 3-layer lamp head, the hydrogen flow rate of the central lamp head should be strictly controlled within an appropriate range to ensure that there is a complete hydrogen-rich layer around the flame, thereby reducing the escape of free chlorine. Friends who wish to have further discussions on the hydrogen chloride synthesis system can participate directly in the discussions or get in touch with me.

I wonder if anyone has encountered salt buildup inside the lamp heads; in severe cases, this buildup can block more than half of the passage. It was discovered last week during maintenance of the hydrochloric acid furnace. On a daily basis, there is a significant issue with alkali present in the hydrogen gas.

When a large-scale synthesis furnace uses 3 layers of lamp heads, the hydrogen flow rate of the central lamp head must also be strictly controlled within an appropriate range – what is this ratio generally, for example in a 2-in-1 furnace with an inner diameter of 800 mm?

At present, the hydrogen flame arrester at the inlet of the hydrochloric acid furnace has been removed for inspection, and it was found that more than half of the passages in the flame arrester were blocked by impurities; according to the manufacturer, this is due to salt