A cyclone furnace with low no x Mixed burning gasification residual carbon system

Abstract

The invention discloses a cyclone furnace with low NO x In the system of burning gasified residual carbon, water-cooled tube clusters are arranged in the center of the cyclone and refractory materials are laid to form a liquid slag film, which improves the slag collection rate of the cyclone furnace and captures gasified residual carbon for burning on the wall; the outer wall of the central water-cooled tube cluster is arranged The pipe sleeve, the central powder feeding sleeve runs through the burner and extends to the area where the liquid slag film begins to form in the middle of the central water-cooled tube cluster, and the gasified residual carbon is sent to the high temperature zone of the cyclone after being preheated by the central powder feeding sleeve; The high-oxygen-concentration airflow generated by the air membrane separator is sent to the center powder feeding sleeve to help the gasified residual carbon ignite and burn, and the low-oxygen-concentration airflow generated by it supplements the secondary air, so that the cyclone can form a deep air separation effect to reduce fuel NO x Generated amount; the steam and slag water generated by cooling the liquid slag are used in the pulverizing system to improve the energy utilization efficiency of the cyclone furnace. The invention can realize high efficiency and low NO of gasification residual carbon in cyclone furnace x Combustion, and improve the slag collection rate and energy utilization efficiency of the cyclone furnace.

Description

technical field [0001] The invention belongs to the field of thermal power generation energy saving and emission reduction, in particular to a cyclone furnace with high efficiency and low NO x The system of blending and burning gasification residual carbon is suitable for recycling the ash produced in the process of coal gasification. Background technique [0002] Coal gasification technology is a clean and efficient technology for coal utilization. Currently, it occupies a large market in coal utilization. However, due to the limitation of the process principle, a large amount of unburned residual carbon is produced during the coal gasification process, which solves the problem that gasification residual carbon is difficult to utilize. The problem has great significance for the development of coal gasification process. [0003] Compared with raw coal, gasification residual carbon has finer particle size, higher ash content and ultra-low volatile content, and has higher ine...

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Problems solved by technology

[0002] Coal gasification technology is a clean and efficient technology for coal utilization. Currently, it occupies a large market in coal utilization. However, due to the limitation of the process principle, a large amount of unburned residual carbon is produced during the coal gasification process, which solves the problem that gasification residual carbon is difficult to utilize. The problem has great significance for the development of coal gasification process

[0003] Compared with raw coal, gasification residual carbon has finer particle size, higher ash content and ultra-low volatile content, and has higher inertness and NO x The conversion rate, although the ash content has little effect on the combustion of the general cyclone boiler, and can meet its combustion temperature, but the finer particle size makes it difficult to burn out due to the short residence time in the cyclone. In addition, how to reduce the NO of the cyclone furnace x Emissions are also becoming a new issue

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