Heat-Treatment Plants. Carbon

Transcription

1 Heat-Treatment Plants Carbon In The Graphite And Industry 500 C 1000 C 1500 C 2000 C

2 Solutions Fitted Exactly To The Process Requirements Of The Carbon And Graphite Industry RUHSTRAT GmbH supplies world wide production lines for carbon fibres with heat treatment plants. This enables manufacturers to increase their production capacity. Carbon fibres are considered as one of the most important materials of the future. Particularly due to the development in the energy sector these material has strongly gained in importance. In the air craft industry more and more components are used out of carbon fibre, because they are much lighter than components out of aluminium and therefore the gas consumption of air planes can be reduced enormously. Also when using renewable energy carbon fibres play a key role. The rotor blades of big offshore wind power plants consist usually of carbon fibres. Therefore the world wide demand for carbon fibres has strongly increased. RUHSTRAT GmbH from Germany has now developed heat treatment plants, which enable the manufacturers of carbon fibres to increase their production enormously. The new industrial furnace plants make a production capacity of more than 2000 tons per year possible. Since decades RUHSTRAT GmbH is an important supplier for the carbon industry. With its complex industrial furnace plants the company supplies the decisive core technology for the production of carbon fibres. The plants are used for carbonizing and graphitizing. In the plants yarns, felts, fleeces, bands, fabrics, up to pipes and other parts are produced. The scope of delivery of the industrial furnace plants of RUHSTRAT GmbH for a carbon fibre line include the following components for the heat treatment: a LT- furnace (low temperature furnace) till approx C a HT- furnace (high temperature furnace) till approx C a UHT- furnace (ultra high temperature furnace) till approx C Furthermore RUHSTRAT has developed special inlet and outlet sealing boxes, cooling zones, gas distribution stations, gas pre-heating equipment, cooling water distributors as well as a complete measuring and control station with its own process control system for the industrial furnace plants. The advantages of the industrial furnace plants of RUHSTRAT GmbH are: high temperature constancy over the width of the fibre through hot gas fans and panel heating of the LTfurnace. high temperature constancy over the width of the fibre through a circular heating around the muffles of the HT- und UHT- furnace. low energy losses through the application of high quality insulation materials. low consumption of protection gas because of the RUHSTRAT-sealing box systems. high durability of the muffles through patented bearings and additional components for the controlled expansion. low shutdown time and maintenance costs through the choice of high quality materials and components.

3 LT-Furnace Muffle has patented bearings. expansion of the muffle from the muffles middle to the outside. free expansion in longitudinal direction and cross direction. expansion in longitudinal direction is supported and controlled by a special equipment. Construction of the muffle is made by a special software. This eliminates thermal tension inside the muffle. Durability and life time of the muffle increases. By using special stream plates in the inlet area of the muffle, the condensate of tar is minimized. Heating consists of high quality ceramic fibre modules with integrated heating. Heating conductors are made for a max. heating conductor temperature of 1180 C. This means a durability of several years. By using these heating modules a very homogeneous temperature spreading is attained. The insulation of the backward wall consists of high quality mineral fibre. This reduces the loss of heat. Lost power is approx. 350 W per m² at 850 furnace temperature. central exhaust gas treatment unwinders oxidation oven inlet sealing

4 HT-Furnace The body of the furnace is equipped with special cooling plates which cool directly the heating space, no sandwich construction: metal-wall -thermal conduction cement cooling plates. This avoids local overheating of the body. The insulation consists of only high quality graphite insulation (Graphite felts). As last layer there is a high quality ceramic fibre. The heating is located around the muffle. This makes the furnace to attain a very homogeneous balanced temperature. Each heating zone is 3-phase. This means that the supply network system is charged in a symmetric way. The heating can be changed easily after having opened the cover of the muffle, without disassembly. At an extra charge we can provide specially by RUHSTRAT manufactured variable transformers. By this the supply network system is not charged with harmonicwave. Perating company does not need to invest in expensive compensation equipment. The high current transformers are integrated into the supporting stand. There is no need for caves on the ground floor. Water coolings are cased as much as possible. Hoses will be avoided where it is possible. box low temperature furnace outlet sealing box inlet sealing box high temperature furnace

5 Sealing boxes Sealing boxes are made of stainless steel. Inside the sealing boxes there are adjustable and distortion free orifices made of stainless steel, CFC, graphite, according to applied temperature. Therefore the transition gap is constant all over the total width. The inlet and outlet compartments can be opened and shut together or separately by hand wheels. This means that the gap can be adjusted to the thread pass-through in ideal way during the process. The inlet sealing boxes are insulated and can be run at 400 C hot nitrogen. The gas heater including the necessary gas armatures is available at an extra charge. The outlet sealing boxes are water cooled and serve in cooperation with the inlet cold nitrogen as cooling zone. Furthermore Furthermore RUHSTRAT has gas preheating equipment, cooling water distributors as well as a complete measuring and control station with its own process control system for the industrial furnace plants. damping zone with outlet sealing box surface treatment sizing and drying rewinders

6 Binding Posts Sockets Lead-Through Bolts Transformers Voltage Stabilizers AC/DC Reactors Power Resistors Emergency Power Supply Emergency Lighting Industrial Furnaces Ruhstrat GmbH Heinestrasse 12 D Bovenden Germany phone: +49 (0) fax: +49 (0) internet: Department: Industrial Furnaces phone: +49 (0) fax: +49 (0) /2009 Technical details are subject to change