It’s very difficult to increase the liquid level in our company’s gasification furnace; it remains around 30%!
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The flow rate of the quench water is between 150 and 160, while the discharge volume of the black water is around 60. The furnace temperature is not high either. The on-site level gauge has a range of 4.2 meters, with the level usually around 1.4 to 1.5 meters. Now they want to talk about 40-50%! Is there anyone who can give some advice? Thank you!
The situations you mentioned include the following: 1. The remote level gauge is inaccurate and shows a deviation from the actual liquid level. The remote transmission value is low, while the actual liquid level is high. I have encountered this situation too. 2. Both the height and volume of the quench chamber are too small, and the presence of liquid in the gas prevents the liquid level from rising. Basically, it’s these two reasons.
Increase the discharge volume of the black water from the gasifier and boost the water circulation rate in the system; this is due to the high thermal load of your system
In the case of a multi-nozzle gasifier, without the use of correction formulas, this liquid level is quite normal. To avoid infringement issues, the quenching chamber in multi-nozzle gasifiers has a straight-up-and-down structure, resulting in a small volume of liquid; since the amount of water saturated in the saturated gas remains constant, it is difficult to increase the liquid level. A conical quenching chamber would yield better results.
The liquid level in the quench chamber of the gasifier is affected by various factors, including the gasification load, heat load, and the amount of water used for quenching. The methods adopted are: first, increasing the amount of water used for quenching to maintain an excess in the water circulation within the quenching chamber; second, reducing the gas flow rate; third, reducing the thermal load.