Conveniently-assembled cowl with self-tightening function

Abstract

The invention discloses a conveniently-assembled cowl with a self-tightening function. The cowl comprises a main air duct, the main air duct stretches into a cowl head, and the main air duct is hermetically connected with the cowl head; the circumference of the cowl head is uniformly provided with multiple cowl-head spiral air vents, and a certain included angle is formed between the direction of each cowl-head spiral air vent and the cross section of the cowl head; and the cowl also comprises a branch air duct, the branch air duct in the cowl head is detachably connected with the main air duct, the top of the branch air duct is closed, and the side wall of the branch air duct is provided with a branch-air-duct air vents. The cowl disclosed by the invention has the characteristics of drop prevention, good abrasive resistance and capability of preventing large particles from depositing, and is convenient to install, replace and maintain, and the like.

Description

technical field [0001] The invention belongs to the technical field of fluidized air distribution in the hearth of a circulating fluidized bed boiler, a feeder, an external bed, a fluidized bed slag cooler and the like, and in particular relates to a wind cap which is easy to assemble and has a self-tightening function. Background technique [0002] The reasonable structure of circulating fluidized bed air cap directly determines the quality of material fluidization of fluidized bed boiler, which affects the ignition, combustion and safe and economical operation of the boiler, and even affects the convenience of installation and the length of maintenance time. There are many forms and types of air caps for circulating fluidized bed boilers, but the effect shown in actual operation is not satisfactory, mainly manifested in problems such as shedding, wear, leakage of bed material, and blockage of most air caps during operation. After continuous improvement, the more widely use...

AI Technical Summary

Problems solved by technology

Reasonable design of the size, quantity and layout of the outer holes can make this kind of hood work well in the early stage of operation, but with the increase of operating time, it is easy to appear that the particles formed by the small hole due to injection will wear sharply around the small hole and affect the fluidization. quality

Moreover, large particles in the furnace are prone to deposit, causing problems such as uneven fluidization in the furnace of circulating fluidized bed boilers and bed coking

In addition, because the top of the main air duct is a through hole, it can only be sealed if the hood head is installed in place. If the installation is not in place, the resistance will not match the design

However, in the actual manufacturing and transportation process, it is inevitable that there will be problems such as thread jamming and uneven end faces, resulting in improper installation, which will cause the equipment to fail to work normally.

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