The surface load of Defrost heater element is directly related to the life of electric heat pipe. Different surface loads should be adopted when designing defrost heating element under different use environment and different heating medium. defrost heating tube is a heating element which is placed resistance wire in stainless steel 304 tube and tightly filled with crystalline magnesium oxide powder with good heat resistance, thermal conductivity and insulation in the surrounding space, and then treated by other processes. It has the characteristics of simple structure, high mechanical strength, high thermal efficiency, safety and reliability, easy installation and service life bench.
1. Widely used in various saltpeter tank, water tank, acid and alkali tank and air heating furnace drying box, hot mold and other devices. Fault phenomenon: blown fuse fuse diameter is too small, insufficient capacity; Short circuit between power cord plug and electric socket; The primer or lead of the electric heat pipe falls off, causing short circuit; Main technical indicators: Power parameters: Power at rated voltage is +5%-10% Leakage current: Leakage current < 0.5mA at working temperature Electrical strength: electrical strength at working temperature withstand experimental voltage > 1000V, 50Hz, 1MIN, there should be no flashover breakdown: insulation resistance: Cold insulation resistance ≥100MQ (megohm) Appearance: no significant mechanical scars or local expansion, no wrinkles, bumps and other phenomena at the bend.
2. Mainly used in open, closed solution tank and circulation system heating with non-standard flange electric heater products 5 features: small volume, large heating power; The surface power is large, which is 2 to 4 times the surface load of air heating. It can be heated on various media in various occasions, such as explosion-proof occasions; Highly dense and compact. Due to the overall short and dense, so the stability is good, the installation does not need to choose imported and domestic high-quality materials, scientific production technology, strict quality management, to ensure the superior electrical performance of the electric heat pipe.
3. The heating temperature is generally up to 720℃. The heating system can be fully automated, including the control of the electric heating system through the DCS system. Long service life, with multiple protection systems, safe and reliable. The combined type mostly uses argon arc welding to connect the electric heat pipe with the flange, and can also use the form of fastening device, that is, each electric heat pipe is welded with fasteners, and then the flange cover is locked with nuts, and the pipe and fastener are welded with argon arc welding, never leaking. The fastener sealing place adopts scientific process, single replacement is very convenient, greatly saving the maintenance cost in the future. Stable electrical performance, high thermal efficiency, energy saving more than 30% than the general metal heating body, heating speed is very fast.
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Post time: Mar-26-2024