LPG Cylinder Annealing / Stress Relieving Furnace

Introduction for heat treatment furnace

Continuous cylinder heat treatment nature gas heat treatment furnace is widely used for heat treatment of steel cylinder. The heating of the furnace is divided into two sections. One section is the heating section (horizontal); the second section is the high temperature section (horizontal).

Normalizing Furnace



Parameter and requirements:

1.Continuous heat treatment furnace: total length for this machine is 20 meters(furnace is 15 meters, loading & unloading holder is 5 meters). The furnace is welded by high quality section steel, the furnace is lined with high temperature resistant high alumina refractory firebrick, insulation layer is made of fiber and other thermal insulation materials. Overall, the high temperature furnace is light and of good insulation performance.
2.Application: Cylinder normalizing heat treatment
3.Specification: ISO Standard, cylinder weight:6kg/pc, 12.5kg/pc,25 and 52kgs Diameter of cylinder is from DN200-400mm
4.Working efficiency: 200pcs/hour
5.Entrance temperature: 30ºC
6.Cylinder heating temperature: 900ºC±25ºC
7.The max. working temperature of the furnace body: ≤1000ºC
8.The temperature rise of furnace body surface is according to China industry standards.
9.Parts of the furnace:
10.Horizontal furnace body: 1 set
11.Loading and unloading chain mechanism: 1 pair
12.Nature gas control system(record containing): 1 set
13.Flue gas and heat exchange system: 1 set
14.Fuel type: nature gas
15.Fuel calorific value: 8500 Kcal / kg
16.The form of combustion apparatus: high-speed fuel burner
17.Heating quantity and thermal load distribution: 8 pcs gas burner
18.No. of burners in heating section:4 pcs burners, 230KW/pcs
19. No. of burners in the front of temperature holding section : 2 pcs burners, 230KW/pcs
20. No. of burners in the back end of temperature holding section : 2pcs burners, 150KW/pcs
21.Power supply: 20KW, 380V, 50Hz

B: Annealing Furnace



Parameter:

Between each section of furnace, they are connected by angle steel flange, easy to install and adjust.

C. Frequency Electrical Furnace:

I. Frequency heating principle:

Frequency heating is using frequency power to change 380V, 50Hz power current into the suitable frequency current by rectification and contravariant. Input this current into resonant tank composed by the heating furnace, to make the furnace coil produce alternating magnetic field, while the pre-heating metal material stay in the alternating magnetic field, the material will produce the alternating current and heating by itself, high hot efficiency and low energy consumption.

Feature:

Frequency induction heating power factor≥96%, has automatic impedance adjustment function, the performance of energy saving is obviously.

Power output is steady, heating temperature is easy to control, good consistency to improve the heating quality.

Good diathermancy, magnetic field has a good permeability to the metal workpiece, it's not heating conduction, so the temperature difference of workpiece movements is small and improve the products' quality.

Temperature measuring system closed-loop control heating power, the precision of temperature is high.

Automatic impedance adjustment and automatic frequency adjustment function, inspecting system impedance transformation caused by the cylinder from cool to hot during the whole heating process automatically. Adjusting the output parameter automatically and making the whole heating process stay in energy-efficient state, saving more power.

II. Heating process requirement:

9KG, 14KG LPG cylinder production line:

Workpiece size: 9KG, 14KG LPG cylinder

Heating temperature: 780 - 900°C (The heating temperature sets according to the technology demand, adjustable)

Mixed production line heating speed: 14 second/per cylinder

Productivity: 2000 pcs / 8 hours

III. User required equipment power calculation:

9KG, 14KG LPG cylinder production line:

Size: BPS-550 frequency power. GT-9, 14/550 name: 9KG, 14KG LPG cylinder frequency heat treatment furnace.

Power: 550KW

IV. Composition of cylinder heating treatment equipment:

1. BPS series frequency power: one set

Size: BPS-550

Rated power: 550KW

Shunt capacitor: one set (under the furnace)

Power factor: Full power state arrive more than 96%.