Burner of possessing multiplepath entrances of solid fuel, and application

Abstract

This invention discloses a combustor with several entrances for solid fuel, and its application. The combustor comprises an outer nozzle, a middle nozzle, an inner nozzle, ducts connected with the above nozzles, and two or more branch ducts for feeding solid fuel through connected with the central duct. The ratio of total cross section area of the branch ducts to the central duct is (1-1.5):1, which can avoid difficult measurement of solid fuel mass flow rate due to large caliber of the duct, and improve the distribution uniformity and flow stability of high-concentration solid fuel at duct cross section. The combustor has such advantages as convenient control over mass flow rate, simple structure, convenient production and maintenance, and wide applications, and can be used for producing synthesis gas from solid carbon-containing substances by partial oxidation.

Description

technical field [0001] The invention relates to a burner with multiple solid fuel inlets for preparing syngas by partial oxidation of solid fuel. technical background [0002] How to efficiently and cleanly utilize solid fuel gasification to produce synthesis gas, fuel gas and reducing gas has always been a topic of concern in chemical production. Among the many gasification methods, people are generally optimistic about the entrained-bed gasification technology, which has many advantages such as high production intensity, high gasification efficiency, and strong adaptability to solid raw materials; among them, the burner (also called burner) is an entrained-bed gasification technology. One of the key equipment in gasification technology. [0003] In order to form a good process effect and prolong the service life of the burner, the structural design of the burner is very important, which plays an important role in the final process result and equipment safety. [0004] At...

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Problems solved by technology

[0005] Under the condition that the burner has only one solid material inlet, compared with the gasification system equipped with multiple burners, for the gasification system equipped with only one burner, the inner diameter of the solid fuel delivery pipe must be greatly increased. The distribution of gas-solid two-phase flow on the cross-section of the pipeline is extremely uneven, resulting in unstable flow, and even the gasification process conditions are difficult to strictly control, affecting the normal operation of pneumatic conveying

On the other hand, larger pipe diameters also cause difficulties in accurate measurement of solid material conveying parameters (Y. Yan, FlowRate Measurement of Bulk Solids in Pneumatic Pipelines——Problems and Solutions, Bulk Solids Handling, Vol.15, 447-456, 1995 ), due to the inherent non-uniform distribution of the gas-solid two-phase flow on the cross-section of the pipeline, there is no reliable instrument that can accurately measure the instantaneous mass flow rate of the gas-solid two-phase flow in a larger pipe diameter in industrial production, and At present, the development of solid mass flow rate measuring instruments is still in the laboratory stage

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