Wood dust recovery device for achieving multistage separation and sand removal

Abstract

The invention discloses a wood dust recovery device for achieving multistage separation and sand removal. The wood dust recovery device mainly comprises a wood dust bin, a discharging rotary valve I,a motor I, a feeding helix, a vertical discharging pipe, an oblique discharging pipe, a sand separating chamber, a motor II, a fan I, a sand and impurity delivery pipe, a discharging rotary valve II,a vertical sand separating pipe, a wood dust delivery pipe I and a fan II. A main air inlet and a fence are arranged at the communication position of the oblique discharging pipe and the sand separating chamber, the main air inlet is provided with a main air door, and an auxiliary air inlet is formed in the communication position of the wood dust delivery pipe I and the vertical sand separating pipe (18). The auxiliary air inlet is provided with an auxiliary air door. The wood dust recovery device is simple in structure, high in separating efficiency and good in sand removal effect, the airflow speed in a sand removal machine can be controlled, and wood dust and sand which are separated can be automatically delivered to a corresponding external device.

Description

technical field [0001] The invention belongs to dust separation equipment, and in particular relates to a wood dust recovery device for multi-stage separation and sand removal. Background technique [0002] Surface sanding is the last process in the fiberboard production process. According to calculations, after the fiberboard is sanded, the amount of wood dust produced accounts for about 3-4% of the fiberboard product volume. As the world's largest producer of fiberboard, my country produces an astonishing amount of sanding wood dust every year. Regarding the treatment of fiberboard sanding wood dust, most fiberboard manufacturers in my country currently use dust collection equipment to recover wood dust for resource conservation considerations, and then mix it with fibers as additional raw materials in proportion to re-use it for pressing fiberboard. The recycling of sanding wood dust can not only reduce the waste of resources and reduce production costs, but also can fi...

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Problems solved by technology

For this reason, the inventor has proposed some schemes, such as Chinese patent application number 2014208041607, Chinese patent application number 2014208041842, and Chinese patent application number 2015101573109, etc. These technical schemes have realized the effective separation of wood dust and sand grains to a certain extent, But they still have some deficiencies, such as low separation efficiency, unadjustable air velocity, uncontrollable sand separation effect, unable to automatically transfer separated sand and impurities, etc.

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