The use of a combustion flue gas recirculation (FGR) design can effectively reduce NOx emissions. Hauck's RTR burner can achieve flue gas recirculation by means of external ejection. With this design, NOx emissions can be reduced to 252g/[email protected]. In the early 1980s, an improved U-shaped radiant tube technology emerged in Europe. The outlet-side tube was bent back over the periphery of the combustion tube to allow the combustion products to exit at the burner. The unique feature of this technology is that the heat exchanger installed at the discharge port is in the same parallel direction as the combustion-supporting cold air entering the radiant tube, thus avoiding the use of a complicated piping system to preheat the air. In fact, this technique is to design the radiant tube as a tube-in-tube structure, and the burner burns in the inner tube. It is conceivable that in such applications, the temperature of the radiant tube inner tube must be much higher than that of the outer tube. Only in order to achieve the ideal heat transfer.
The original radiant tubes were made of high-temperature alloy materials. However, in the high temperature furnace, the radiation tube of this structure has a limited service life. This has seriously affected the reputation of SER technology. A new type of silicon carbide material formed by combining silicon carbide resin and metal silicide into an internal matrix structure opens up a new development opportunity for the burner manufacturer in the field of high-temperature radiation tubes. Hauck has specially developed a new SER technology, SERamic, which has been patented and widely used. In the new design, the outer tube of the radiant tube is made of alloy material or silicon carbide, and all the inner layers of the inner layer Tubes, air nozzles, and heat exchangers are all made of silicon carbide. When applied to a strip production line, it is not practical to use silicon carbide as the outer tube because one rupture will damage the entire radiant tube. In response to this situation, Hauck patented a flexible silicon carbide inner liner called Sicaflex. As a result, even if a horizontally mounted alloy outer tube is bent at a high temperature, it will not cause damage to the inner silicon carbide tube. .
Black Iron Wire is a kind of hard drawn carbon steel wire, suitable for weaving, fencing, galvanizing or tying applications.
Annealed iron wire is also named soft annealed iron wire,is made from hard iron wire after annealing treatment. The product has the advantages of easy to bend and greater flexibility compared to hard iron wire.
We offer iron wire with basically three treatments: black iron wire, Galvanized Iron Wire and annealed wire.
Black iron wire, simply oil painted against rust, without any galvanizing. Black iron wire is a kind of hard drawn carbon steel wire, suitable for weaving, fencing, galvanizing or tying applications.
Black Iron Wire is supplied in reel, coil or cut into certain sizes or in U shape.
Black Iron Wire can be galvanized into galvanized iron wire or annealed into annealed iron wire.
*Related Products: Black Steel Wire , Black Metal Wire , Black Annealed Iron Wire .
Black Wire
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Anping Weihao Hardware Wire Mesh Products Co., Ltd. ,