Process burner used for pressure gasification of powdered coal

Abstract

The invention provides a process burner used for pressure gasification of powdered coal, and belongs to the technical field of coal chemical industry. The technical problem solved in the invention isas follows: the process burner used for pressure gasification of the powdered coal is provided to change arrangement of oxygen and powdered coal medium passages, optimize a powdered coal passage swirling flow field, strengthen mixing of oxygen and the powdered coal, greatly improve combustion efficiency and improve safety of a gasification furnace; and the technical solution adopted by the invention is as follows: the process burner used for the pressure gasification of the powdered coal comprises a main oxygen passage, a powdered coal passage and a cooling water passage which are embedded insequence from the inside to the outside to constitute a coaxial annular passage sleeve structure, the main oxygen passage and the powdered coal passage each have a hollow structure with a contracted lower end with a taper angle, the cooling water passage has a jacket structure with a closed lower end, the lower part of the cooling water passage extends into an upper opening of a combustion chamberof the gasification furnace and is fixed by process burner flanges, the bottom inner wall of the main oxygen passage is provided with a turbulent flow structure, and a plurality of powdered coal distribution pipes are spirally twined in the powdered coal passage. The process burner provided by the invention is mainly used for a dry powdered coal multi-burner combined gasification furnace.

Description

technical field [0001] The invention relates to a process burner for pressurized pulverized coal gasification, which belongs to the technical field of coal chemical industry, and specifically relates to a novel dry coal powder gasification furnace process burner structure. Background technique [0002] The current entrained bed gasification technology is the mainstream technology of modern coal chemical industry. Dry coal powder multi-burner entrained flow gasification technology mainly includes Dutch Shell pulverized coal pressurized gasification waste boiler process, chilling process technology and Kelin CCG pulverized coal pressurized downward chilling process gasification technology. [0003] The traditional pulverized coal pressurized gasification process burner adopts the central channel as the pulverized coal channel, and the outer channel as the main oxygen channel structure. Since the pulverized coal is a straight tube single channel, the pulverized coal only has a ...

AI Technical Summary

Problems solved by technology

[0003] The traditional pulverized coal pressurized gasification process burner adopts the central channel as the pulverized coal channel, and the outer channel as the main oxygen channel structure. Since the pulverized coal is a straight tube single channel, the pulverized coal only has a flow rate along the axis of the channel. and momentum; the outer epoxy channel is limited by the disadvantage of its low density. Although it can take the form of tangential circular jet flow, it is limited and its momentum is small, so it is difficult to achieve a complete fusion of pulverized coal and oxygen and strengthen the contact probability. Finally, the overall Burning effect is poor

On the other hand, the main oxygen channel is set on the outside, and it is not easy to be entrained after the oxygen is injected, which may cause the flame to be close to the wall of the combustion chamber of the gasifier, thereby posing a risk of high temperature ablation

Images