Gasification furnace and chilling chamber thereof

Abstract

The invention discloses a gasification furnace and a chilling chamber of the gasification furnace of the gasification furnace. The chilling chamber of the gasification furnace comprises a downcomer consisting of a gas reduction tube and a gas distribution tube, wherein the lower end of the gas reduction tube extends into the gas distribution tube, a gas exhausting net is arranged in a circular space between the gas distribution tube and the gas reduction tube, the lower edge of the gas reduction tube is lower than the plane where the gas exhausting net is positioned, and a plane where the gas exhausting net is positioned is lower than the liquid level of the chilling chamber. Compared with the prior art, for the gasification furnace provided by the invention, an ascending pipe is removed, the water-bringing phenomenon of the synthesis gas of the chilling chamber is effectively inhibited, and the water bath humidifying, dedusting, desmutting and temperature reduction effects of the synthesis gas are improved.

Description

technical field [0001] The invention relates to the field of gasification of gasification coal, in particular to a gasification furnace and a chilling chamber thereof. Background technique [0002] Coal is an important energy source. For a long time, the use of coal has been accompanied by serious environmental pollution. In recent years, people have paid more and more attention to clean coal technology aimed at reducing pollution emissions and improving utilization efficiency; coal gasification technology, as one of the coal processing and conversion technologies, is considered to be one of the most efficient and clean clean coal technologies. [0003] Modern coal gasification technology, especially high-pressure, large-capacity entrained-bed gasification technology has been widely used in industry. In our country, many manufacturers have introduced and used modern entrained bed gasification technology. Modern entrained bed gasification technology is mainly divided into co...

AI Technical Summary

Problems solved by technology

[0010] In addition, when the production load is relatively high, since the annular gap between the riser and the downcomer is relatively narrow, the flow rate of the syngas after leaving the water bath is fast, which is easy to cause the phenomenon of syngas carrying liquid, even if the syngas in the quenching chamber leaves There is a separation baffle in the channel, and the high-speed flowing gas still sweeps away the small liquid droplets on the baffle to carry liquid again. The liquid in the quenching chamber will easily cause the liquid level in the quenching chamber to drop rapidly and cause the gasifier to trip. It is necessary to increase the chilled water supply flow to ensure the liquid level, which not only increases the energy consumption and waste of water resources, but also increases the load of the rear system at once, which affects the stable operation; when the operating temperature of the gasifier is high , resulting in a high heat load, which increases the saturated vapor pressure, which will also cause the synthesis gas to carry water into the rear system

[0011] For the gasifier of the prior art, when the load is super high, part of the syngas will bypass the lower edge of the riser to form large bubbles and leave the water bath, which will cause fluctuations in the liquid level in the quench chamber and liquid level alarms caused by fluctuations. even jump

[0012] Chinese patent application number 200720103616.7 provides an atomization-submerged gasifier quenching chamber, which is actually not suitable for pulverized coal / coal-water slurry gasifiers, especially for pressurized coal gasifiers, because of its structural Defects are likely to cause the atomizer and atomizing nozzle to be quickly worn out by the strong erosion of high-temperature slag and coal ash, causing rapid damage to the inside of the quenching chamber, so that the long-term operation of the gasifier cannot be guaranteed

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