What is the main function of the slag outlet in a gasification furnace?
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What is the main function of the slag outlet in a gasification furnace?
Protect the quench ring； Rate limiting to ensure response time
Protect the quench ring； Rate limiting to ensure response time
1. Protect the quench ring; 2. By creating a necking effect, a pressure difference is established between the combustion chamber and the quench chamber, thereby increasing the gas flow rate and breaking through the liquid seal in the downcomer；
The function of the slag outlet is still to cause necking, to collect the liquid slag in one place, and to provide space for the installation of the quenching ring. Also, after necking, the slag and syngas are directed together into the water bath, I guess this is to take into account the difficulties in equipment manufacturing.
There is another important role that has not been taken into account
The size of the slag outlet can also control the intensity of slag discharge
How does the slag outlet protect the quenching ring? Please explain
1. Through the constriction at the slag outlet, the crude syngas and liquid slag are concentrated, the descent speed of the crude syngas and slag is reduced, the cooling time in the quench water bath is increased, and the size of the quenching ring is also reduced. 2. A pressure difference is established at the slag outlet; by monitoring the pressure difference between the quenching chamber and the gasification furnace, it is possible to determine whether there is slag blockage at the slag outlet. 3. By measuring the heat loss at the slag outlet, it is possible to determine whether the slag outlet has been burned through.
Protect the quench ring, increase the reaction time, raise the gas flow velocity in the downcomer, and break through the liquid seal