Expocorma 2015 - Concepción, Chile
Arauco trains 20 employees in Advanced Drying of wood
Arauco again has relied in MAHILD in order to train 20 of their employees from different sawmills. Specifically, it was a course of ADVANCED DRYING. In total there were 4 days of classes and the course was attended by Heads of area supervisors, responsible for process improvement, related mechanical drying process. The course will consider advanced training involving different themes present in the drying process, such as: Application of Fourier and Heisler equations r for heating and cooling, drying time model by convective mass transfer, thermal power through psychrometric model, model of thermal energy.
Arauco again continues with Mahild
In sawmills Viñales 05 dryers will be installed. There are three tunnels with three fully independent control areas and two front loaded kilns. Designing new concept in recoing reducing considerably the condensation and waste liquids. Also includes system MULTI-HUM. Including the new kilns, the plant will have 11 MAHILD kilns and two RECOS.
Forest Tromen awarded 05 dryers to Mahild
Forestal Tromen site Loncoche, are installing 5 accelerated MAHILD kiln type tunnel, implemented with ECO-VENT system.
CMPC installs 06 MAHILD Kilns
In sawmills Constitution, CMPC installs 06 accelerated drying of front-loading kilns with hot water heating and equipped with ECO-VENT system. In addition they will be first dryers with color cover in Chile.
Arauco training 30 employees in the wood drying.
Arauco, the largest Chilean forestry company chose MAHILD in order to train 30 of their employees from different sawmills. It was a training course for operators of high-tech drying. In total there were 8 days of classes and participating were kiln assistants, operators, supervisors and department heads.
The course included a comprehensive training that involved different topics present in the drying process, such as anatomical knowledge of wood, wood physics, thermodynamics and Psychrometry, heat and moisture transfer, best practices of filleting and charges, schedule creation, degradation and ways to reduce, control system operation, engineering notions of drying, drying of Eucalyptus and thermally modified wood.
The feedback of the participants was very positive and planning was made for an advanced course of drying to be performed by MAHILD in a couple of months.
NZ's first operational continuous timber drying kiln
Red Stag Timber in Rotorua commissioned this week New Zealand’s first operational Continuous Counter Flow Kiln. The kiln capacity is 100,000m3 of dried timber per annum. Rather than the more traditional kiln designs and operation, the Mahild double tracked 60 metre kiln uses two tracks within the kiln. The heat from the hot dry exiting stack is used to pre-condition green lumber entering the kiln and the humidity from drying green lumber is also used to recondition dry wood exiting the kiln.
This new kiln will significantly reduce the energy required to dry timber and is part of Red Stag’s drive to improve efficiency and product quality. Kiln Manager, Steve Goldsmith says he is extremely pleased with the quality of the lumber coming out of this new Mahild kiln.
Description of pilot-scale thermo-kiln of IHD
The thermo-kiln of IHD (fig. 1) allows to manufacture thermally modified timber (TMT) in a pilot-plant scale by defined conditions. The kiln of type MAHILD MH 2000 TMT is configured for thermal treatment under normal pressure at temperatures up to 250 °C. For distinct process steps, steam can be added. Staple size is up to 1200 mm length; the usable volume is of about 0.5 m³. The optimal cross-section is 650x650 mm², the maximum 900 mm width and 800 mm height. The kiln can be used as conventional kiln dryer, too, with controlled supply and exhaust air valves. With a special technology, applied for patent in Germany in 2010, it is possible to treat plane materials, like veneers or panels, with a high quality. This kiln is controlled by PC (fig. 2) and SPS with software MM 4000. The process steps and a lot of parameters are freely programmable; a typical run is shown in fig. 3. Control factors for the thermal modification are kiln and wood temperature, respectively, for kiln drying this is air temperature and air humidity. Relative air humidity is measured by psychrometers, the wood moisture by electrical resistance method. The wetting, e. g. for cooling down, is done by water spray. For a uniform flow, the fan can be operated in a forward-reverse mode, controlled by a be frequency converter.
James Jones investet in Mahild kilns
James Jones & Sons Ltd is investing in a further six kilns from Mahild in a move which will boost annual kilning capacity at its Steven's Croft mill operation at Lockerbie to 160,000m3. The latest move at the site will take the group’s total number of kilns to 16. The new units are expected to come on stream during October and reflect the growing volumes being processed through the new sawline at the Lockerbie 3 mill. Existing kilns at the site are fitted with a heat recovery system and have already successfully reduced energy consumption. The kilning complex is being heated with hot water provided by the neighbouring Eon biomass power plant and conveyed by a pipeline installed in 2010. James Jones said the system saves an estimated 9,000 tonnes of carbon emissions annually.
Mahild reduces drying energy
The key focus for kiln specialist Mahild was its latest developments for cutting energy used in drying timber. The newest technology highlighted was the latest generation of its ECO-VENT system, ECO-VENT III. This uses exhaust air from the kiln to warm incoming air and also captures radiant heat from the unit’s walls and roof, “reducing heat transmission to almost zero”. Heat from electric motor panels, frequency drives and piping is also recovered. “The latest system can save 25-30% of the thermal energy used to dry lumber by conventional technology,” said Mahild’s Lance Vinnell. “For a 200m³ capacity kiln, that’s a CO2 reduction of 650 tonnes a year, equal to the emissions from 130 homes.” He added that as part of its DryGreen initiative Mahild has also developed new energy management control systems. Among Mahild’s latest UK clients are Howie Forest Products and James Jones & Son, with the latter installing its kilns at its new Lockerbie plant.
„DRY GREEN“ – the future of lumber drying
Introduction of the MAHILD environmental policy by focus of consistent technology for significantly improved environmental performance, with consistently high productivity for the benefit of our environment.
- Reduction of CO2 emissions
- Reduction of the emission of exhausted air
- Reduction of noise
- Reduction of the thermal energy requirement for drying up to about 25%
- Reduction of heat and transmission losses in housing and foundation
- Reduction of electrical energy by variable air flow during drying Intelligent energy management for the optimum use of heat and increased boiler efficiency.
New 100,000m3 Kiln – Commissioning October 2008
Red Stag Timber has invested in another Mahild high temp kiln. The new kiln will have a capacity of 100,000m3 per annum. Red Stag has ensured the learning from the Mahild installation back in 2006 has been implemented with this installation. We requested Mahild “Guru”, Dirk Daniels, to project manage this installation. Local agents, Lyle Engineering, are the contracted installers. Project timelines are running to plan, even with the inclement weather we have experienced. The commissioning date is set for mid-October, 2008.
BSW Sawmills , Fort William, UK
After careful selection and detailed technical studies from proposals of all renown potential suppliers the German kiln manufacturer MAHILD DRYING TECHNOLOGIES, Nürtingen was selected to supply and build the additional dry kiln capacity at Fort William mill.
The project includes 10 new all-aluminium dry kilns of a net volume of 200 m3 each and the installation of the most advanced kiln control system, MAHILD MM 4000.
The kilns will be equipped with the MAHILD ECO-VENT II – System to allow recovery of heat from the exhaust system of the dry kilns. The system provides low energy usage especially in winter months and helps to ruduce energy cost.
In addition to this it was also decided to install the MM4000 Energy Management System which allows operators to program product priorities and considers the energy available from heating plants on the site in order to manage best possible productivity and product quality.
MAHILD is one of the most experienced kiln manufacturers in the world specialising in high production dry kilns for softwoods. It´s Technology is geared for large scale production of kilns and their components. Today’s manufacturing capacity allows production of 500 kilns per year in various sizes.
The last of the 36 large capacity dryers at „KBH Klausner Holz Bayern“ goes into operation. 2007-04 Challenge passed with flying colours: At „KHN Klausner Holz Niedersachsen“ the final chamber block is completed and handed over for operations.
In a rush…
… building continues on the second block of dryers at „ KHB Klausner Holz Bayern“. The first facilities are delivered in March.
The first chamber block, encompassing 18 large capacity dryers, takes up operation at „ KHB Klausner Holz Bayern“ after a construction period of merely four months.
MAHILD obtains the third order from “GELO Holzwerken”. Including this, third chamber block, a total of approx. 700m³ drying capacity are available.
Achieving success with the help of MAHILD:
Two further „High Speed“ drying centres are installed at CMPC in Chile. D rying performance doubles.
Klausner chooses to go with the proven MAHILD technique:
Contruction start of 24 large capacity dryers „KHN Klausner Holz Niedersachsen“.
Here we go:
Building permission for a large capacity saw mill is given to “KHB Klausner Holz Bayern“, 36 large capacity dry kilns are ordered.
Three batches per day:
RED STAG chooses MAHILD UHT technology and changes to three shift drying.
Expansion of production capacity:
A new machining centre is installed in the new manufacturing site.
Mahild receives orders to equip German sawmills "Binder-Holzindustrie" in Kösching and "KHB Klausner Holz Bayern" in Landsberg
The 68 large-volume dry kilns have a total capacity of 22.000 m3 of lumber. Assembly at both sites will start after the summer holidays 2005. The kilns are produced at the new production plant, with a production area of ca. 8,000 m2. The first components will be leaving the plant at the end of August, 2005.
Prepared for the future:
New manufacturing facility is up on full production capacity after only 2 months of operations.
On-time, on-budget, again:
At Klausner Holz Sachsen 28 high capacity kilns are commissioned with only 6 months installation time.