Coal coke Y-shaped entrained-flow bed cleaning high-efficiency gasifying technology

Abstract

The invention provides a coal coke Y-shaped entrained-flow bed cleaning high-efficiency gasifying technology. In the coal coke Y-shaped entrained-flow bed cleaning high-efficiency gasifying technology, a gasifying furnace, a gas and ash separator, a fluidized bed heat exchanger, a moving bed heat exchanger and the like are arranged, wherein the gasifying furnace is separated into a gasifying chamber and a chilling chamber, and the gasifying chamber and the chilling chamber are separated by a sectional conical seal head; a casing of the gasifying chamber is sequentially provided with a heat insulation material layer, a cooling sleeve and an abrasion-resistant material layer from exterior to interior; the bottom part of the gasifying chamber is provided with a cooling liquid inlet, and the top part of the gasifying chamber is provided with a cooling liquid outlet; a top spray nozzle is arranged at the center of the top part of the gasifying chamber, and three or more side spray nozzles are uniformly arranged at the upper part in the circumference direction; the center of the sectional conical seal head is provided with a gasifying product outlet, and the gasifying product outlet is communicated into the chilling chamber; a chilling spray head is arranged at the outside of the gasifying product outlet, a solid slag discharge pipe is arranged at the center of the conical seal head at the bottom part of the chilling chamber, the solid slag discharge pipe is communicated into the fluidized bed heat exchanger, the upper part of the chilling chamber is provided with a crude synthetic gas outlet, and the crude synthetic gas outlet is communicated into the gas and ash separator; the moving bed heat exchanger and two stages of lock hopper dischargers are respectively arranged at the outlets of the fluidized bed heat exchanger and the gas and ash separator; the residual heat of the gasifying product is fully utilized to solve the problems of black water and salt-containing wastewater.

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, and hot slag water seals still form a large amount of 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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