High-temperature crude synthesis gas chilling device

Abstract

The invention relates to a high-temperature crude synthesis gas chilling device, which comprises a gas flow channel of a chiller and an atomizing nozzle arranged on the side wall of the gas flow channel, wherein the gas flow channel is connected with a reaction chamber and a cooling chamber of a gasification furnace and provides a mixing space for a chilling medium and high-temperature crude synthesis gas; the atomizing nozzle is a single-flow-channel pressure nozzle or a double-flow-channel gas-liquid two-phase nozzle, and is partitioned into 1-20 layers; each layer is uniformly distributed on the circumference and is used for uniformly spraying the chilling medium into the high-temperature crude synthesis gas and chilling the synthesis gas to be in a specific temperature range; the gas flow channel is a water cooled-wall or a fire-resistant and wear-resistant liner or the combination of the water-cooled wall and the fire-resistant and wear-resistant liner; and the gas flow channel has a cylindrical structure or a conical structure or the combination of the cylindrical structure and the conical structure. The chilling device has the advantages of high chilling efficiency, large gas-liquid contact area, high chilling rate, small dosage of the chilling medium, mature manufacturing technology, high reliability and capability of reducing the consumption and the discharge of cleaning black water, and relates to an environmentally-friendly and-energy saving technology.

Description

technical field [0001] The invention relates to a quenching device, in particular to a high-temperature crude synthesis gas quenching device for quenching high-temperature crude synthesis gas and molten slag at the outlet of a reaction chamber of a gasifier to a specific temperature range. Background technique [0002] The coal gasification reaction of the entrained bed gasifier is usually carried out at a high temperature of 1200-1700 ° C. The high-temperature crude synthesis gas generated by the reaction needs to be cooled to a specific temperature before it can enter the subsequent equipment for dust removal, heat recovery, washing and other production operations. Different types of gasifiers have different cooling methods for high-temperature crude syngas according to process requirements, and the cooling equipment varies widely. A typical GE coal-water slurry gasifier uses a quenching ring and a water bath to excite high-temperature crude syngas. The Shell pulverized co...

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Problems solved by technology

The applicant proposed a synthesis gas preparation and heat recovery method in the patent CN200710175473.5. In the method, the high-temperature synthesis gas and the slag droplets carried by it need to be quenched to the temperature range required by the process. The applicant In patents CN200910047706, CN201020567950, CN201020607955, and CN201020607531, a new coal gasification equipment is proposed, which is used to realize coal-to-synthesis gas, partial quenching of syngas and first-stage heat recovery in the method described in patent CN200710175473.5 Steps, in the aforementioned five patents, it is necessary to chill the high-temperature crude syngas and the slag droplets carried by it to a specific temperature range. It is easy to burn out the chilling ring and the downcomer. If Shell’s chilling tube structure is used, the amount of chilling gas required is large, the power consumption of syngas cycle compression is large, and the chilling effect is not good. In order to overcome the existing syngas chilling device The present invention provides a chilling device for chilling the high-temperature crude gas to a specific temperature range, which can quickly, efficiently, and uniformly chill the high-temperature syngas and the slag droplets carried by it to the temperature range set by the process

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