Novel pulverized coal nozzle and pulverized coal feeding mode

Abstract

The invention provides a novel pulverized coal nozzle and a pulverized coal feeding mode. A pulverized coal inlet is formed on the pulverized coal nozzle, a channel of the pulverized coal inlet is tangential to the outer wall of a pulverized coal channel, and the included angle between the nozzle and the center line of the pulverized coal channel is 68 degrees; two reinforcing steel bars are parallely arranged in the pulverized coal channel, so that a cyclone pulverized coal channel is formed in the pulverized coal channel; the two reinforcing steel bars are wound on the inner wall of the pulverized coal channel, the winding angle of the pulverized coal inlet is 35 degrees, and that of the pulverized coal outlet is 60 degrees; pulverized coal and nitrogen rotate forward along the cyclone pulverized coal channel formed between the two reinforcing steel bars to be rotatably sprayed out of the pulverized coal channel at a certain angle, and the pulverized coal sprayed out of the nozzle is still of a certain suspension degree. According to the invention, pulverized coal and an oxidant are fully mixed and combusted, the pulverized coal can be uniformly conveyed into a hearth, and the novel pulverized coal nozzle is stable and reliable to use.

Description

technical field [0001] The invention relates to a pulverized coal burner in a dry pulverized coal gasification device. Background technique [0002] In the field of coal chemical industry, the dry powder pressurized coal gasification process is widely used for its outstanding advantages such as wide adaptability to coal types, high carbon conversion rate, low oxygen consumption, high thermal efficiency, and low pollution. During the start-up stage of the device, the temperature and pressure are raised by a special ignition start-up system. After the furnace parameters meet the design requirements, the device starts to put coal into operation. [0003] The role of the pulverized coal burner in the dry pulverized coal gasification device is to deliver the pulverized coal and oxygen to the furnace of the gasification device, and to ensure that the two are evenly mixed. The most important pulverized coal supply method is the supply method of the existing pulverized coal burner. ...

AI Technical Summary

Problems solved by technology

[0003] The role of the pulverized coal burner in the dry pulverized coal gasification device is to deliver the pulverized coal and oxygen to the furnace of the gasification device, and to ensure that the two are evenly mixed. The most important pulverized coal supply method is the supply method of the existing pulverized coal burner. Generally, it is a direct-flow jet, and there is no swirling device in the pulverized coal channel, which cannot ensure sufficient mixed combustion of pulverized coal and oxidant

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