Chippers for timber industry
29 April 2013
The idea of getting profit from wastes is not a new one. Thus, only processing of chips into pellets – a rapidly developing trend – goes back in mid 1970s (times of oil crises in America and Europe). Using of chips (a byproduct of sawmilling) for pulp production counts over 100 years. The first chippers for wood processing were manufactured in Germany in the second half of XIX century, and as it used to be with other inventions underwent different stages of development and are widely used today.
Disc technology remained basic for chippers for many years. It was perfectly combined with frame saws at sawmills and allowed processing mainly slabs and edges into chips. Step by step frame saws were replaced with chipper canters with the appearance of which slab and edges reached back, with drum chippers being more reliable and effective for processing lump wastes as compared to disc ones. Today effective and durable stationary drum chippers perform an integral part of a modern sawmill.
Chippers are successfully used for round logs (e.g. low-grade wood) chipping. Such chips is efficiently used for heating boilers and for pellets manufacturing process. Stationary HEINOLA 1310 RS chipper with its efficient infeed system and big knife drum of 1300 mm diameter ensures high capacity for round wood even up to 350 cubic meters of chips/hour.
For chipping the material of smaller size (e.g. lump wastes at sawmills), other chipper models by HEINOLA can be used for these bioenergy purposes. The smallest model is equipped with 500 mm diameter drum.
Also the plywood industry has become aware of the chip quality made by the HEINOLA chippers with a special chipper model being developed for waste veneer chipping.
HEINOLA – being European leading chipper producer – manufactures chippers for different purposes – from above mentioned stationary chippers (that are more effective at large production volume) till mobile chippers for fuel chips production from harvesting wastes and trees directly at the cutting site, as well as at the junctions of forest roads and cutting sites and at upper and lower landing sites. These chippers are easy to be transported to raw material storage and need no installation, with forwarder, tractor or truck chassis being used for transportation.
The practice shows that hauling of such materials as branches, limbs and low quality logs of small diameter that can’t be further processed is not efficient, whereas it can be much more profitable to getting chips form them at the site.
HEINOLA mobile chippers have been working decades by the forest roads and also in the terminals producing chips to be transported to local heating boilers. The latest chipper model is manufactured in two different sizes. The bigger one is HEINOLA 1310 ES and the smaller one HEINOLA 910 ES, with, the drum diameters being 1300 mm and 900 mm correspondingly. These chippers are extremely strong, so-called heavy-duty machines with long lifetime and high capacity. The amount of the rotating parts has been minimized, which resulted in development of a chipper with low operating costs and energy consumption. Also with these mobile chipper models we reach the excellent chip quality.
The fact of using mobile chippers at the Finnish sawmills for decades proves that these machines are a reliable tool that needs no mechanical changes within operation and allows getting extra profit from wastes at the same time.