Pit annealing heat treatment furnace

Technology working condition

1 uses: wire annealing

2 main products: low carbon steel (steel, 1020 1018)

3 processing wire: hot rolling and wire drawing after the two state

4 heating mode: electric heating.

5 temperature control: temperature setting and  temperature control

6 protective gas: N2 (Customer to provide)

General parameters

1. name:pit type annealing furnace

2. annealing temperature:950℃(MAX)

3. total equipment:well type annealing furnace body and control system 

4. One set furnace heating body, two sets stainless steel barrels.

Equipment details:

1 furnace body:

1.1 the furnace shell is welded by steel plates and sharp irons. The surface have polish and rust treatment, paint high temperature paint(300℃ paint).

1.2 The furnace outer line is build by Shaped brick and refractory material, the outer line sharp build according to the vessel.

1.3 Inner line is piled with Refractory fiber cotton and blanket,thickness:325mm(25mm cotton blanket and 300mm sharp fiber),max temperature: 1260℃,between the sharp fibers  are fill with blankets

2 Heat system:

2.1 Power source:3P-380V

2.2 Heat element:belt type heat element(0Cr21Al6Nb)

2.3 Power controller:Regulating voltage regulator(Made by Sitong)

2.4 Heat element fix method:use spiral ceramic nail to fix the heat elements, it can effectively prevent heat leakage

3 barrel:

3.1 The equipment have two barrels.

3.2 barrel body material SUS321*10mm thickness,Round type bottom head SUS321*12mm thickness

3.3 barrel body have the hyperbolic wave forming treatment, it have high strength and not easy to deformation and cracking.

3.4 The barrel have light design to reduce the bottom press.

3.5 double sealed ceramic fiber packing and configuration of 8 manual clamping device, good sealing performance

3.6 The heat insulation cotton felt can effectively prevent leakage of steam drum

3.7 Thermocouple tube use thick stainless steel tube to increase the service life.

4 Diversion plates

4.1 Material:SUS321*12mmthickness

4.2 Use many plates system, welded as 30~45°,keep strong structure and improve the hot air uniformity.

4.3 improve the furnace hot air uniformity

5 furnace cover:

5.1 The equipment have two furnace covers with cycle fans.

5.2 the furnace cover top use plate and strong with sharp irons. The furnace cover structure could fix the fan.

5.3 Round shape bottom head material is SUS321*8mm thickness.

5.4 The head is formed by spinning, this type of structure is lighter and reduce the weight

5.5 The furnace cover line is lay by Refractory fiber cotton to reduce the heat loss.

5.6 The sealing flange and the inner barrel are in exact agreement, which can effectively keep the pressure in the furnace

5.7 The gas pipes use thick stainless steel tubes.

6.cycle system

6.1 use double water cooling sealed motor, inverter control can effectively protect the motor and the process of adjustment

6.2 the circulating fan power is 18.5KW*4P, the axis material SUS310S

6.3 fan speed:  0~1440rpm (according to the actual medium of equipment)

6.4the axial flow impeller size: Φ700mm, the material is SUS310S, high structural strength

6.5 impeller parameters: maximum flow: about 10000 m3/h ; wind pressure: about 300Pa

7.Strong cool system

7.1Rated power:2.2KW*2sets

7.2high air volume design can ensure that it can quickly cool down

7.3 fan parameters: maximum flow: about 40m3/min; maximum static pressure: about 380mmaq

7.4 using variable frequency control can effectively protect the motor and the process of adjustment

8.Control system

Basic automation control system to complete all control functions of the equipment

In order to improve the safety, reliability and cost saving, use intelligent temperature control instrument.

Temperature control: temperature setting automatic control

Cooling control system: the temperature set automatic operation, fan cooling

Inside the main electrical components using high-quality brands, stable and accurate quality and reliable,

8.1 using the power adjusting controller to adjust the three-phase voltage, current and power of the equipment. Using  SHIMADEN series intelligent table(made in Japan) as the control core, by PID auto tuning, high control precision, SSR output drive, optimum temperature, rich parameter setting, detection and perfect protection function.

8.2 due to the heating of the whole furnace, the heat insulation is used to import the power adjustment module, intelligent constant temperature. And components working long life, saving energy and reducing consumption. The interference of the power grid is almost zero.

8.3 temperature measurement components selection of  K type 0 degrees Celsius to 1100 ℃ thermocouple, and with the compensation wire, its +, - pole and the temperature controller input correspondence. And equipped with pressure gauge, super temperature sound and light alarm and explosion-proof device.

8.4 circulating fan and strong wind cooling machine frequency conversion control can effectively protect the motor

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