Jet type gas-solid separating device

Abstract

A jet-type gas-solid separation device relates to the thick-thin separation technology and equipment in boiler burners. The device is composed of a primary straight pipe section, an expansion pipe section connected with the straight pipe section, and a core pipe arranged at the center of the expansion pipe section. The present invention utilizes the difference in inertia of the gas-solid two-phase fluid to rapidly separate the two-phase fluid by expanding the tube to generate a jet. The separated thick fluid is collected through the core tube, and the light fluid is collected through the peripheral annular channel. The invention directly provides the separation effect that the concentrated strands are in the center after separation, has light wear, small pressure drop, can be adjusted, good separation effect and simple structure. The primary air separation used in the swirl burner can greatly improve the efficiency and stable combustion characteristics of the burner, which is beneficial to prevent slagging and high-temperature corrosion in the burner area, and has a long service life and stable operation.

Description

technical field [0001] The invention belongs to a gas-solid separation device, in particular to the density separation technology and equipment in boiler burners. Background technique [0002] The burner is one of the key components of the boiler, its performance directly affects the stability of the boiler, combustion efficiency, NO X The formation, slagging characteristics and high temperature corrosion indicators. Rich-lean combustion has been proposed in recent decades and widely used in a variety of direct current, swirling low NO X One of the key technologies of the burner, in order to create fuel-rich combustion in the early stage of combustion and reduce NO X The build provides prerequisites. [0003] At present, there are a variety of thick and thin separation technologies at home and abroad, such as ① using the elbow at the entrance of the burner to divide the primary air into two parallel thick and thin streams by inertia, such as B&W's DRB and PAX burners, Mit...

AI Technical Summary

Problems solved by technology

The various gas-solid separation technologies listed above have a common disadvantage of severe wear and resistance, which not only increases the operating cost of the boiler in the power plant, but also reduces the safety of the boiler operation

In addition, except for the radial separation technology (Chinese patent: a radial thick-lean swirl pulverized coal burner, CN93244359.1), the above separation cannot directly form the separation effect of inner thick and outer thin, and some equipment needs to be rearranged to achieve inner thick A reasonable state of external light, otherwise it is not conducive to the stable combustion, high efficiency, anti-slagging, anti-high temperature corrosion and other performances of the swirl burner

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