Overflow type iron bath slag melting pool and slag removal method thereof

Abstract

The invention relates to an overflow type iron bath slag melting pool and a slag removal method thereof. The overflow type iron bath slag melting pool is characterized by comprising an annular furnace lining, wherein a hollow slag opening with the shape of cone frustum is formed in the middle of the furnace lining; an overflow port in the upper end of the slag opening is slightly lower than the upper edge of the outer wall of the furnace lining in the height direction; an annular slag pool is formed between the outer wall of the furnace lining and the slag opening; an inductor is arranged on the outer part of the furnace lining; a magnet yoke is arranged on the outer part of the inductor; a water cooled jacket is arranged on the outer part of the magnet yoke; an annular tray shaped furnace bottom is arranged below the furnace lining; a through hole which corresponds to the slag opening is formed in the middle of the furnace bottom; and a furnace charge layer is arranged between the furnace bottom and the furnace lining. With the adoption of an electromagnetic induction heating and melting principle, metal iron is added into the bottom of the slag pool in advance and is molten into molten iron through induction heating so as to continuously supply heat to liquid slag in the slag pool, and the liquid slag can preserve the flowing temperature to flow out of the overflow port of the slag pool. The slag is removed by adopting an overflow mode, a phenomenon that the slag removal is unsmooth due to small slag opening is avoided, and the operating efficiency and operating safety of a fixed bed slag gasifier are improved.

Description

technical field [0001] The invention relates to a slag pool and a slag discharge method, in particular to an overflow iron bath slag pool and a slag discharge method. Background technique [0002] At present, the slagging device at the lower part of the traditional slag gasifier body is mainly an inverted conical slag pool. The inner surface of the slag pool is in a convergent configuration from the upper end of the slag pool to the lower end of the slag pool. The horizontal slope of the inner surface of the slag pool is 25°~60°. At the same time, the slag discharger adopts the intermittent slag discharge method, that is, a pressure difference detection is installed between the furnace body and the quenching chamber, and it is interlocked with the release valve of the quenching chamber. When the liquid slag in the molten state accumulates to a certain height in the slag pool, there will be an exact pressure difference value, which triggers the interlock, and the release val...

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Problems solved by technology

For coal with high ash melting point, because the temperature in the slag pool is not high enough, the fluidity of liquid slag is poor, resulting in blockage of the slag outlet, affecting the normal operation of the slag gasifier

In addition, the arrangement of annular burners at the bottom of the slag outlet has problems such as complicated connection, large natural gas consumption, and difficulty in controlling the combustion flame of the annular burners.

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