Thedouble-core adjustable shrinkage orifice is used in the powder feed pipe at theoutlet of the coal mill to adjust the resistance of the primary air pipe tocontrol and adjust the amount of primary air and coal powder entering eachburner.

Thedual-core adjustable shrinkage orifice adopts the same two core plates, and theopening area is adjusted by the reciprocating movement of the center of thepipe. The two core plates are driven by the same screw rod, which is called asingle-axis dual-core adjustable shrinkage orifice; the two core plates arecomposed of two driven by a screw, it is called a dual-shaft dual-core adjustableshrink orifice.

Thecharacteristics of the dual-core adjustable shrink orifice produced by ourcompany are as follows:

Adopting double-core adjustableshrink orifice plate, double-core plate reciprocates outward from the center ofthe pipe to adjust the opening area. Ensure that the coal powder in thepipeline always flows in the center of the pipeline, solves the problem ofeccentric flow of coal powder with adjustable shrinkage orifices, and reducesthe flow loss;

Design with a sealing device toprevent coal powder from leaking into the shrinkage orifice, which can keep theequipment flexible in opening and closing;

It is designed with dials and indicator needles to adjust the opening degree. Thedials indicate the percentage of cross-sectional area adjustment and stroke.The adjustment is very convenient and intuitive;

Thewindward surface of the double core plate and the inner wall of the channelbarrel are lined with silicon carbide ceramics, which can improve the wearresistance of the product, prevent the inner wall and the core plate fromwearing too fast, ensure the adjustment accuracy, and extend the service life.

Silicone carbide linedceramic uniaxial double core adjustable shrinkage orifice

Lining silicon carbideceramic biaxial double core adjustable shrinkage orifice

Parametertable of adjustable shrinkage cavity with uniaxial double cores lined withsilicon carbide ceramic

Parameter table of adjustable shrinkage orifices with silicon carbide ceramic lining biaxial and dual core