What pressure is maintained in the bridge tubes, rising pipes, and collection pipes of a coke oven?

Maintain a positive pressure inside the carbonization chamber

The standard is 80–100 Pa, with a minimum of not less than 5 Pa.

I first heard about the use of blowers before initial cooling; the load must be quite high in that case. It’s sufficient to maintain the pressure in the gas collection ducts at 80–120, as this helps to ensure a slight positive pressure in the carbonization chamber

This is the first time I’ve heard that blowers are installed in front of the primary cooler. I wonder how low the temperature of the raw gas can be reduced in your plant’s gas collection system. If it’s cooled too much, the viscosity of the tar increases, which can lead to blockages in the suction pipes. At a cooling temperature of around 80 degrees, even if we ignore the load on the blower, can the bearing sleeves of the blower handle such a high temperature?

Sorry, I made a mistake; we are after the initial cooling.

Maintain a positive pressure in the carbonization chamber, especially during the late stage of coking.

1# For determining the pressure in the oxygen collection duct, the standard is to ensure that all the carbonization chambers of the furnace maintain a positive pressure throughout the coking cycle. Generally, the pressure at the bottom of the furnace chamber below the air intake pipe at the end stage of coking is set at 5 Pa, and the pressure in the gas collection pipe at this time is considered the standard pressure. Because the suction force of the suction pipe on the gas collection pipe is greatest here, as long as 5 Pa can be maintained at the end of coking, the remaining carbonization chambers will all meet the requirements. However, it varies depending on factors such as the coal ratio, the tightness of the carbonization chamber, the amount of coal added, the quality of ammonia spray, and atmospheric temperature. Small coke ovens are around 120 Pa, while large coke ovens are around 180 Pa.

Banzhu, are you guys from a coking plant? Where was it designed? I’ve heard for the first time that gas blowers are used before initial cooling – could there be a mistake? There are many experts in the coking industry here; let’s not embarrass anyone! ! ! The moderator should focus more on improving their own qualities; since they hold the position of moderator, they ought to have higher skills than ordinary members, otherwise...................

Why make things more complicated! As long as the pressure in the gas collection duct is properly controlled (by calibrating the pressure at the bottom of the carbonization chamber), the pressure in whatever type of furnace it is, as well as in the areas you mentioned above, will naturally be normal.

Generally, it is sufficient to ensure that the pressure in the carbonization chamber remains at least 5 Pa at the end of coking

The pressure in the gas collection pipe is generally maintained at 80–120 Pa. The pressure at the bottom of the carbonization chamber should be kept above 5 Pa toward the end of coking; of course, the pressure in the rising pipe bridges is positive

It might be the first of its kind in the country – why is a blower used before initial cooling? But what is the manufacturing process? The pressures in the bridge tube and rising tube change due to the different coking times in the carbonization chamber, but the pressure must always remain positive. The pressure in the gas collection tube varies depending on the type of furnace, generally staying between 80–130 pascals

The pressure of the collector pipe is determined based on the type of coke oven in your plant; it is set such that the pressure at the bottom of the carbonization chamber directly below the suction pipe is not lower than 5 Pa at the end of coking