Liquid slag discharge four-nozzle BGL
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The gasification furnace is a pressure vessel that needs to be connected to the atmosphere during slag discharge. How can the pressure inside the gasification furnace be maintained? I would appreciate it if colleagues could explain this; it’s not clear from the drawings why this is necessary. Please provide a more detailed explanation, and it would be helpful to compare it with Lurgi furnaces as well
Haha, well, there’s definitely a way to do it. But for now, surely no one will take the initiative to tell you
This post was last edited by tgyouyadezhu on 2010-5-18 07:49 O(∩_∩)O~! Sir, you should first strengthen your knowledge of basic concepts!
If you learn about our Shenzhou spacecraft, you’ll see that the principle is the same.
It features advanced partitioning measures, interlock control, and sequential control, so there will be no problems as long as it is operated properly. It is recommended to take a look at the PID drawings.
Sir, I’ll briefly explain this issue. The original poster is absolutely correct: in the case of pressure gasification, slag discharge takes place by releasing it from the pressure vessel into the atmosphere, and this is achieved through a slag lockhopper. Let me explain its principle briefly: the high-pressure molten slag coming from the gasification furnace enters the pressure-filled lockhopper under the force of its own gravity. As a result of a chain reaction, the inlet valve of the lockhopper closes, and the pressure inside the hopper is reduced to match atmospheric pressure, after which the slag is discharged into the slag pool. After that, pressure is applied again, and this process repeats itself. Therefore, the slag lockhopper is a container whose pressure changes cyclically; in its design, consideration must be given to material fatigue. This type of hopper used for feeding pulverized coal has many similarities, except that the feeding is done using gas (carbon dioxide or nitrogen), while slag discharge is accomplished using liquid pressure.
It is recommended to strengthen theoretical knowledge* and review the operating procedures for the Lurgi furnace; in fact, the slag discharge system of the BGL furnace is basically the same as that of the Lurgi furnace.
Does that mean, just like in the Ruchi model, there is no valve between the lower part of the vaporization furnace and the quenching chamber, while there is a valve between the quenching chamber and the slag lock, which is used for slag discharge and during pressure relief cycles?
Bro, BGL has sixteen nozzles; I’ve never heard of a version with four nozzles, haha
Bro, in simple terms, the vaporization furnace first discharges the slag into a lockhopper at the same pressure as it, then cuts off the connection to that lockhopper, releases the pressure in the lockhopper, and finally discharges the slag at atmospheric pressure