RU103753U1 - DEVICE FOR CHINING AND DRYING WOOD CHIP AND Sawdust - Google Patents

Abstract

 A device for grinding and drying wood chips and sawdust, including a bed, an activation chamber with an activator and a classifier consisting of a fan and a receiving pipe, characterized in that, in order to increase productivity, the receiving pipe is equipped with a filter with calibrated holes.

Description

The utility model relates to the field of technology for the production of wood processing products, and more specifically, for the production of fuel pellets, briquettes and wood-polymer composites from waste from woodworking industries, more specifically for their grinding and drying.

There are devices for grinding and drying wood chips and sawdust, which is a closed chamber with an activator for grinding sawdust placed in it, a device for supplying wet sawdust, a channel for supplying hot air and a classifier that locks the input channel for unloading dry chopped sawdust, for example, the device according to patent No. 66232 Priority 04/09/2007

Such a device is difficult to manufacture and maintain, since the drive shaft of the classifier rotation is located in the high temperature zone, is mounted on the curved surface of the discharge channel and is also subject to intense abrasive wear.

The closest in technical essence device for grinding and drying wood chips and sawdust can be considered the device according to patent No. 87368 of March 24, 2009, in which the classifier operates in the most comfortable conditions, due to the fact that its impeller is as close to the drive as possible to reduce low-frequency vibrations of the classifier, and the receiving pipe is straight-through and most rigid to ensure stable operation of the classifier. Such a device is not productive enough, since its performance is limited by the working pass of the classifier impeller, that is, established patency.

The purpose of this utility model is to eliminate this drawback, that is, increase the performance of the device. This goal is achieved by the fact that the receiving pipe of the classifier is equipped with a filter with calibrated holes.

The device is illustrated by the attached drawing. In Fig.1 shows a General view of the attached device in section.

It consists of a frame 1, an activation chamber 2, an activator 3, a fan 4, a receiving pipe 5 with a filter 6 and a discharge channel 7.

The device operates as follows: wet wood chips and sawdust mixed with hot air enter the activation chamber 2 mounted on the bed 1. The activator 3, which is a hammer mill, rotates wet wood waste (wood chips and sawdust) during rotation, which, due to centrifugal forces, are discarded on the periphery of the activation chamber and are intensively dried with hot air. Air-conditioned, that is, small and dry sawdust is passed by the classifier in the form of an impeller 4 and a receiving pipe 5 and fed through the latter into the discharge channel 7. Due to the fact that the throughput of the classifier is limited, and the number of conditioned sawdust may exceed its throughput, the side surface of the receiving pipe 5, equipped with a filter 6, passes the sawdust through its surface, bypassing the working pass of the classifier. This embodiment of the device significantly increases its performance.

Claims (1)

A device for grinding and drying wood chips and sawdust, including a bed, an activation chamber with an activator and a classifier consisting of a fan and a receiving pipe, characterized in that, in order to increase productivity, the receiving pipe is equipped with a filter with calibrated holes.