I. Description of wood chips (sawdust) drying production line:

　　With the development of science and technology and resource tension, wood chips (sawdust), as well as all kinds of straw, edible fungi dregs have been transformed from discarded waste products into utilizable resources, used for making wood chips products and made into high combustion value of biofuel, which require the wood chips and crushed dregs to go through the drying process. And many drying equipment on the market is not applicable, many biomass pellet fuel manufacturers precisely because of the low efficiency of the drying equipment, equipment operation is not smooth and product quality and other issues, can only maintain production, low profits, thus making biomass fuel, charcoal producers are forced to need to seek the production of equipment with high efficiency, good process of the equipment of the professional manufacturing enterprises. The optimal design of drying equipment should first meet the ability to produce competitive quality products, followed by investment savings, smooth operation of machinery and equipment and low maintenance costs, high labor productivity, and to take into account the labor conditions and environmental requirements.

II. Overview of wood chips (sawdust) drying production line:

　　Wood chips (sawdust) is a kind of organic matter with water content of about 40-50%, and the general water content after drying is required to be about 12%, and its main moisture is free water and biological water, and the free water is relatively easy to get rid of, while the biological water is difficult to get rid of. The drying process of wood chips (sawdust) is mainly considered from the aspects of output size, finished material characteristics, operation convenience or not, one-time investment and operation cost. At present, most of the wood chips drying equipment adopts air dryer, fluidized bed dryer and drum dryer, among which air dryer and drum dryer are widely used in wood chips drying, air dryer investment is provincial, especially in the output hours, but due to the extremely short drying time of the air dryer, and the coarse and fine can't be graded, it is very easy to dry out the moisture is not stable, and easy to clogging, the operation is not reliable, which results in the back of the equipment can't be matched, resulting in investment and energy costs. The equipment can not be matched, resulting in a waste of investment and energy.

III. Description of wood chips (sawdust) dryer:

　　Special dryer for wood chips is a kind of drying equipment with large processing capacity, which is designed and manufactured according to the specific characteristics of wood chips and analyzed the influence of the structure of the dryer on the output and quality of wood chips.

　　According to the characteristics of wood chip materials, the dryer has been comprehensively technologically reformed on the issues of how to improve the filling rate of materials and the residence time of materials in the cylinder body, adopting a new type of combined lifting device and a multi-layer sleeve structure, so that there is no wind tunnel phenomenon in the materials, so that the wood chips can be fully exchanged for heat and dewatered; and increasing the coarse and fine particles separating device, which greatly improves the heat utilization rate and the output.

IV.Features of wood chips (sawdust) dryer:

1、Automatic control can ensure that the moisture of the dried wood chips is uniform and stable.

2、Automatic de-stoning and iron removal can ensure that the impurities of the dried wood chips do not enter the later process.

3、The investment required for the equipment is 1/6 of the foreign imported products.

4、The thermal efficiency of cylinder self-insulation is up to more than 70% (the thermal efficiency of traditional single-cylinder dryer is only 35%), which improves the thermal efficiency by more than 50%.

5、Adopting tail transmission, the transmission is more stable and reliable; completely change the phenomenon that the rotation of the pallet wheel often slips and affects the production.

6, than a single cylinder dryer to reduce the footprint of about 50%, civil investment by about 50%, reduce power consumption by 60%.

7, a variety of circumferential lifting material combination distribution, effective control of drying time. Good drying effect.

8, according to user requirements can easily regulate the final moisture index.

9、Adopting frequency conversion speed control material flow, according to the user's needs to easily regulate the final moisture index.

10、Low gas temperature, dust removal equipment with a long time, continuous production for the next process.

11, supporting the new energy-saving hot air furnace, energy efficient, thermodynamically controllable, easy to operate, coal consumption down as high as about 60%.