Cinder separation and dry cinder discharge type Y-type entrained flow bed gasifier

Abstract

The invention provides a cinder separation and dry cinder discharge type Y-type entrained flow bed gasifier, which mainly comprises a gasifier, a gas-cinder separator, a fluidized bed heat exchanger, a moving bed heat exchanger and the like, and the gasifier is divided into a gasifying chamber and a chilling chamber, which are partitioned by a sectioned conical end enclosure in the middle; the shell of the gasifying chamber is composed of a heat-insulating material layer, a cooling jacket and a wear-resistant material layer sequentially from the outside to the inside; the bottom of the gasifying chamber is provided with a coolant inlet, and the top is provided with a coolant outlet; a top nozzle is arranged at the center of the top of the gasifying chamber, and more than three side nozzles are evenly arranged along the circumference on the upper part; the center of the sectioned conical end enclosure is provided with a gasified product discharge outlet, which leads into the chilling chamber; a chilling nozzle is arranged outside the gasified product discharge outlet, the center of the conical end enclosure on the bottom of the chilling chamber is provided with a solid discharge pipe which leads into the fluidized bed heat exchanger, and the upper part of the chilling chamber is provided with a crude syngas outlet connected into the gas-cinder separator. The residual heat of gasified product is sufficiently utilized, and the problem of black water and salt-containing wastewater is eliminated.

Description

[0001] 1. Technical field [0002] The invention relates to the field of coal chemical industry, in particular, to gasification of gas flow bed. [0003] 2. Background technology [0004] Coal gasification is the leading and key technology for the clean and efficient utilization of coal. Entrained bed gasification is a new coal co-current gasification technology developed in recent decades. The gasification agent and coal powder or coal slurry enter the gasification chamber through the nozzle, and the pyrolysis, combustion and gasification reactions of coal proceed almost simultaneously. , The high temperature ensures the complete gasification of the coal, and the minerals in the coal become slag and leave the gasifier. Compared with the traditional gasification technology, the pressurized entrained entrained bed gasification temperature is higher, the processing capacity is larger, the gas active component is higher, and the gasification efficiency is higher, which is the dev...

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Problems solved by technology

In practical applications, the performance is far superior to other synthetic entrained-bed gasifiers, but there are still difficulties and uneven slag hanging on the water-cooled wall, and large pieces of slag are easy to be produced, and hot slag water seals inevitably produce difficult-to-treat saline wastewater , affecting long-term safe operation, poor cooling effect of gas circulation, high energy consumption, large investment, weak centrifugal effect of swirling cooling gas to drive syngas to rotate, and large gas volume, resulting in a substantial increase in the load of waste heat boilers, and the structure of the cooling spiral tube is not good Major defects and deficiencies, such as favorable side nozzle arrangement, complex structure, and high material requirements for the pressure-bearing shell, have affected the popularization and application of entrained bed gasifiers for solid phase slag removal

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