Hsk Series Drying and Firing Conveyor Furnace for Stainless Steel Heater with Computer Control

• After-sales Service: 12 Months
• Warranty: 12 Months
• Type: Thick Film Heater
• Certification: CE, ISO
• Structure: Horizontal Type
• Brand: Hengli
• Model NO.: HSK5506-1411Z
• Max Temperature: 1050c
• Belt Width: 550mm
• Belt Material: Cr20ni80
• Temperature Uniformity: +-2
• Transport Package: Wooden Box Iron Bracket
• Specification: 22160*1400*1350mm
• Trademark: HENGLI
• Origin: China
• HS Code: 8514390090
• Production Capacity: 800set/Year

Product Description

HSK5506-1411Z Belt Furnace

• Main Application:

This furnace is mainly used for high temperature firing of thick film circuit, precision resistor, chip electronic components, LTCC, glass glaze, ceramic filter and annealing of photo-voltaic thin film glass.   

,Technical Specification:

1. Max Temperature: 1050ºC, Rated Temperature: 1000ºC.
   1. The Effective Height above the belt:60mm.
   2. Belt Width: 550mm.
   3. Belt Material:Cr20Ni80, DIN 2.4869
   4. Chamber: use big chamber structure.

Max Load on the Belt: 15Kg/m2(exclude the belt weight).
Drive System: Big wrap angle friction drive.

1. 1. Belt Speed: 100~750mm/min, variable frequency motor speed control. Typical belt speed: 450mm/min
   2. Heating Element:heating board
   3. Atmosphere Control: air pipe, the flow of exhaust flowmeter: 10~95L/min, others: 28~280L/min. (please see 3.2 for details)
   4. Cooling Mode: water cooling,  water cooling jacket.
   5. The Layout of Furnace Structure:(please see no.3.1 for details).
   6. Temperature Control Stability: ±1ºC.
   7. Temperature Uniformity: ±2ºC ( Flat-Temperature zone).
   8. Zone Number: 14 zones.
   9. Temperature Control Point: 42 points.(three point temperature control of each zone)
   10. Thermocouple: K type thermocouple
   11. Alarm instructions: Over-temperature, temperature deviation, servo alarm, thermocouple failure alarm, belt slip alarm, , heating elements current absent alarm,  high pressure, low pressure alarm,cooling water failure alarm(low water pressure will engage the alarm, no water pressure will active the emergency stop).
   12. Power-off Protection: add manual operating device.
   13. Emergency Stop Button: Two emergency stop buttons at the entrance and exit of the furnace (One button is for belt stop, and another one is for Emergency stop which is used for switch-off the belt as well as the power of the furnace)
   14. Surface Temperature Heat up(not include the top of chamber): <40ºC(room temperature should be less than 20ºC)
   15. Heating Power: 228Kw.
   16. Heating rate of furnace chamber: <10ºC/min 
   17. Insulation Power of Empty Furnace: ≤70Kw.
   18. Power: Capacity >304KVA,  3 Phase, 5 Line, Single Phase Voltage: 230V Voltage between phases 400 V,  Frequency 50 HZ,  the cable's color:Brown L1, Black L2, Grey L3, Zero blue, Earth yellow/green.
   19. Weight: About 13500Kg.
   20. Overall Dimension:22160×1400×1350mm (L×W×H).(Exclude mounting feet and alarm lamp).
   21. Furnace Appearance: outside panel uses high temperature spraying coating and off-white color. The color label number is RAL 9002.

General Description
The furnace is divided into four major sections: furnace body, Atmosphere control system, temperature control system and drive system.  
  
3.1 Furnace Body Design
Please see Table 1 and figure 1 for detailed layout of the furnace structure.

Figure 1:Furnace Layout Drawing

Table 1
No.	Name	Length	Note
A	Total Length	22160mm
B	Load and Unload Table	2000mm/600mm	Distance from ground height 840 ~ 890 mm, the length of load and unload table is the same.
C	Furnace frame	19560mm
D	Entrance Vestibule Zone	350mm	Include entrance curtain (multilayer stainless steel sheet).
E	Entrance Insulation Zone	150mm	Ceramic fiber insulation
F	The Heating Zone	9600mm	14 zones, the length of zone1~4: 900mm, power: 27kw, the length of others: 600mm, power: 12KW
G	Free Cooling Zone	3600mm	No heating element, thermal insulation material
H	Exit Insulation Zone	150mm	Ceramic fiber material insulation transition
I	Water Cooling Zone 1	3000mm	Double layer stainless steel cooling water jacket structure, one point temperature detection
J	Forced Fan Cooling Zone 2	2710mm	Force fan blow to the parts directly.
K	Furnace Height	1350mm	Exclude the mounting feet and exhaust stack height
L	Equipment operation panel position

3.2 Atmosphere Control System Design
Atmosphere Control: air pipe, the flow of exhaust flowmeter: 10~95L/min, others: 28~280L/min.


  
Figure 2:Gas Layout Drawing
 

Table 2
Code	Name	Explanation
A	Entrance Curtains	Import gas curtain, Prevent outside air from entering the chamber
B	Burn off left gas inlet	It is used to supplement of the fresh air in the heating zone, divided into two channels
C	Exhaust gas inlet left	gas inlet is used for exhaust, the exhaust chimney adopts the venturian pipe with variable diameter, the exhaust quantity is controlled by adjusting the pump air pressure, and the micro differential pressure gauge is equipped
D	Firing gas inlet left	It is used to control the flow direction of furnace to prevent the colloid pollution and firing of products in high temperature area
E	Cooling gas inlet left 1	It is used to control the flow direction of furnace to prevent the colloid pollution and firing of products in high temperature area
F	Cooling gas inlet left 2
G	Exit curtains	Prevent outside air from entering the furnace
Exhaust system: There are 2 exhaust stacks in the preheating section (between zone 1 and 2, zone 2 and zone 3)

3.3 The Design of Temperature Control System

1. Temperature Measuring: use K type thermocouple independent measuring and control on the temperature control point of each zone.   
2. Control Meter: use of Intelligent temperature controller to control, with PID parameter auto tuning, high temperature upper limit alarm, thermocouple failure and other protective alarm functions.
3. Control Mode:Solid State relay zero cross trigger mode.
4. Over Temperature: when over temperature occurred in some zones, over temperature alarm system in corresponding zones immediately send audible and visual alarm signal and meanwhile the heating of all zones are cut off, the buzzer sounds alarm.

3.4 Drive System Design
3.4.1 Drive Control uses servo controller drives the servo motor, which is controlled by the reducer, and the speed is continuously adjustable
3.4.2 Belt conveyor device: to drive the driving and driven wheel through chain and sprocket wheel, and then generate the friction force by driving wheel and the belt drive the belt running. There is a belt deviation guide device on the both sides at the entrance and exit. 

Option:
1.  Computer Control System
Use DCS control system, intelligent temperature controller control , industrial computer monitor, industrial computer can carry out multiple programs saving, real-time temperature and alarm record, data saving and printing and other functions. It also can provide the temperature calibration function in the chamber for adjusting process requirement.