Dry granulation and cinder discharge type Y-type entrained flow bed gasifier

Abstract

The invention provides a dry granulation and 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 upper part of the chilling chamber is provided with a crude syngas outlet connected into the gas-cinder separator, and the fluidized bed heat exchanger is arranged on the bottom of the chilling chamber. 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...

AI Technical Summary

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 it is easy to produce large pieces of slag. The hot slag water seal inevitably produces difficult-to-handle salt Waste water affects long-term safe operation, gas circulation cooling effect is poor, energy consumption is high, and investment is large. The centrifugal effect of swirling cooling gas driving the rotation of syngas is weak, and the large gas volume has caused a substantial increase in the load of waste heat boilers. The cooling spiral tube structure It is not conducive to the arrangement of side nozzles, the complex structure, and the high requirements for the material of the pressure-bearing shell. These major defects and deficiencies have affected the promotion and application of entrained bed gasifiers for solid phase slag removal.

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