RU103754U1 - 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 a feed channel for loading wet chips and sawdust, a stone trap, a hot air supply channel and an unloading channel, characterized in that, in order to increase productivity, the wet wood loading channel wood chips and sawdust is equipped with a reflector in the form of a gable stop fixed at the entrance to the hot air supply channel, and the latter is equipped with a plate stabilizer.

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 sawdust, for example, the device according to patent No. 66232 of priority dated 09.09.2007, which is an activation chamber with a horizontal hammer activator for grinding wood chips and sawdust, a hot air supply channel, a classifier and an unloading channel for dry ground sawdust .

In this device, hot air enters the activator from below, and moist wood chips and sawdust from above, therefore, the entire volume of the activation chamber is used for mixing and drying, which is effective only with a steady (stabilized) thermal regime. Such a device is inertial and, therefore, low efficient.

The closest in technical essence the device for grinding and drying sawdust can be considered the device according to patent No. 78442 priority of 06.23.2008

In this device, a channel for supplying wet sawdust outside the activation chamber is paired with a channel for supplying hot air, as a result of which the process of preparation (steaming, softening) of sawdust takes place before they enter the crushing zone by the activator, which increases the productivity of the device, but particles can get into this arrangement raw materials into the hot air supply pipe due to chaotic vortex formations in the mixing zone, which can lead to ignition of the raw material.

The purpose of this utility model is to eliminate this drawback.

This goal is achieved in that the feed channel of wet wood chips and sawdust is equipped with a flow reflector in the form of a gable stop fixed at the entrance to the hot air supply channel, and the latter is equipped with a plate stabilizer.

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

It consists of a bed 2 with a hammer activator 3, a feed channel for wet chips and sawdust 4, with a flow reflector 5, a stone trap 6, a hot air supply channel 7, with a plate stabilizer of the stream 8 and a discharge channel 9.

The device operates as follows: along the vertical channel 4 moist wood chips and sawdust enter. In its lower part, the specified channel at an acute angle intersects the hot air supply channel 7, which is equipped with a plate stabilizer of air flow 8. On the wall of the channel 4, when entering the hot air stream, a gable reflector of the chip and sawdust flow is installed 5. The chip and sawdust flow, colliding with reflector of flow 5, changes the trajectory of movement and enters the laminar flow of hot air at an acute angle against the movement of the latter, which increases the contact time of raw materials and hot air and activates the mixing of two units The stabilizer of the flow of hot air in the form of inclined plates is installed at an acute angle to the direction of flow of raw materials, which eliminates the ingress of particles of raw materials (wood chips and sawdust) into the horizontal nozzle for supplying hot air. The stones and other foreign particles thrown away by the flow reflector 5 cross the hot air stream at the beginning of its active zone and therefore more steadily fall into stone trap 6. During further movement, the mixture of wood chips, sawdust and hot air enters activation chamber 2 mounted on the bed 1. Hammer activator 3 finally crushes the wood chips and sawdust to the required condition, and the classifier (not shown in the drawing) passes the finished product into the discharge channel 9. This design improves reliability and the producer device

Claims (1)

A device for grinding and drying wood chips and sawdust, including a bed, an activation chamber with a feed channel for loading wet chips and sawdust, a stone trap, a hot air supply channel and an unloading channel, characterized in that, in order to increase productivity, the wet wood loading channel wood chips and sawdust is equipped with a reflector in the form of a gable stop fixed at the entrance to the hot air supply channel, and the latter is equipped with a plate stabilizer.