Drying and Fring Belt Furnace for Thick Film Heater

• After-sales Service: 12 Months
• Warranty: 12 Months
• Type: Thick Film Firing Equipmet
• Certification: CE, ISO
• Structure: Horizontal Type
• Brand: Hengli
• Model NO.: HSK6908-1811Z
• Max. Temperature: 1050 C
• Heating Element: Infrared Lamp for Drying Section, Heating Plate Fo
• Temperature Uniformity: +-2c
• Belt Width: 686mm
• Transport Package: Wooden Box Iron Bracket
• Specification: 22660*1500*1350mm
• Trademark: HENGLI
• Origin: China
• HS Code: 8514390090
• Production Capacity: 800 Sets/Year

Product Description

HSK6908-1811Z Drying and firing Belt Furnace
1,Main Application:

Main Application

This furnace is mainly used for high temperature firing of thick film heaters

2,Equipment specifications and structure:

Code	Name		Length	Note
A	Total length		22660mm
B	Load table		2500mm	Width 1100mm (only this section)
B"	Unload table		600mm
C	Furnace frame		19560mm
D	Drying entrance vestibule zone		350mm	Include entrance curtain
E	Drying section		2000mm	4 temperature zones, each temperature zone is 500mm long, with side lift structure. Upper and bottom heating in first zone with 6kw power each. Bottom heating in 2nd, 3rd and 4th temperature zones with 6kw power. 30kw power in total. -Including withdrawal system, to reach bottom IR lamps and radiation caps for cleaning and maintenance -Constant temperature along width of belt
F	Drying exit vestibule zone		350mm	Include entrance curtain
G	Vestibule zone between drying and firing section		400mm
H	Firing entrance vestibule zone		350mm	Include entrance curtain
I	Entrance Insulation Zone		150mm	Ceramic fiber insulation
J	Firing heating zone		7590mm	14 zones, the length of zone4,5,9,10,14: 330mm, the length of others: 660mm, The zones 1-8 are upper and bottom heating, and the rest of the zones are bottom heating only
K	Firing insulation transition section 1		1320mm	Ceramic fiber insulation
L	Firing insulation transition section 2		2740mm
M	Water cooling zone		2810mm	Water-cooled, including air curtain, air curtain length 350mm
N	Fan cooling zone		1500mm	The fan blows directly, and the hot air collection cover is arranged above. The cooling fan is installed below the steel jacket.
L	Furnace Height		1350mm	Belt height from the ground 914mm, ±25mm adjustable
M	Equipment operation panel position at the cooling section, on the left hand side when facing the loading table.The industrial computer system is installed separately outside the furnace body, with 20m connection cable reserved.
Chamber structure		Large furnace chamber with ultra-light insulation masonry structure
The effective height above the belt		80mm
Weight		About 15500kg
Overall dimension		22660×1500×1350mm (L×W×H).(Exclude mounting feet and alarm lamp)
Furnace appearance		Outside panel uses high temperature spraying coating and off-white color.Color is RAL9002
Special request		The furnace chamber is lined with solid quartz rods
		Firing section chimney material using inconel 601 with 60mm diameter.
		The industrial computer system is installed separately outside the furnace body, with 20m connection cable reserved

3,Thermal system:

Rated temperature	Drying section temperature can be set 100ºC to 200ºC, Firing section temperature can be set from 600ºC to 1000ºC.
Max. temperature	1050ºC
Heating element	Infrared lamp for drying section, heating plate for firing section
Heating power	289kW (total power of drying section 30KW, total power of firing section 245KW, 28KW per temperature zone 1st, 2nd, 3rd, 6th, 7th ,8^th. 14KW per temperature zone 4th, 5th, 11th, 12th, 13th, 7KW per temperature zone 9th, 10th, 14th )
Insulation Power	≤98KW
Heating zone	18 zones
Temperature Control Point	46 points(Single-point temperature control for drying section, three-point temperature control for firing section)
Thermocouple	K type in drying section. K type in Low temperature zone and N type in high temperature zone in firing section.
Surface Temperature Heat up(not include the top of chamber)	<35ºC+room temperature
Temperature Control Stability	±1ºC
Temperature Uniformity	±2ºC ( Flat-Temperature zone of firing section)

4,Drive system:

Belt width	686mm
Wire diameter and threading	B251014
Belt material	Cr20Ni80 2.4869 Balance type,wire diameter 2.2mm,thread 2.5mm, grid 10X14
Max Load on the Belt	20Kg/m2(exclude the belt weight)
Drive System	Big wrap angle friction drive
Belt Speed	75~800mm/min
Drive system	Transmission control adopts servo motor, controlled by reducer, speed continuously adjustable
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.
Belt cleaning method	Brush cleaning

5,Atmosphere control system:

Atmosphere control system	Including air and exhaust system

Air gas circuit: each flowmeter range of 48 to 480L/Min, the total inlet air with a high-precision filter to filter moisture.
A	Drying section entrance curtains		Import compressed air curtain, Prevent outside air from entering the chamber
B	Exhaust gas inlet of drying section		Inlet gas for assisted discharge, ventilated assisted discharge pipe are equipped with manual valves to adjust the gas flow size
C	Gas inlet in drying section		For fresh air replenishment in the heating zone of the drying section
D	Drying section exit curtains		Import compressed air curtain, Prevent outside air from entering the chamber
E	Firing section entrance curtains		Import compressed air curtain, Prevent outside air from entering the chamber
F	Burn off gas inlet of firing section		For fresh air replenishment in the warming area of the firing section
G	Exhaust gas inlet of firing section		Inlet air for assisted discharge with variable diameter ventilator, negative pressure monitoring, electronic micro differential pressure gauge (±125pa)
H	Firing gas inlet 1		Control the airflow direction to prevent gum from contaminating the high temperature firing area
I	Firing gas inlet 2		Control the airflow direction to prevent gum from contaminating the high temperature firing area
J	Exit curtains		prevent outside air from entering the furnace
Exhaust system		One exhaust stack for the drying section and one for the firing section

6,Cooling system:

Cooling structure	Stainless steel cooling jacket with bottom mounted cooling fan
Cooling mode	A combination of mechanical fan direct blowing furnace tube cooling and water cooling

7,Safety protect:

Stop Belt Button	There is one stop button at each end plate of the entrance and exit, when pressed, the belt stops running. Please position buttons on left hand side when facing the load table (on long side not short side)
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)
Emergency Stop Button	1 emergency stop button for each inlet and outlet end plate (for cutting off power in case of emergency) plus manual shaking out device Please position buttons on left hand side when facing the load table (on long side not short side)
Power-off Protection	add manual operating device

8,Temperature control system:

Temperature measuring	Using K type thermocouple in drying section. use N type thermocouple independent measuring and control on the temperature control point of high temperature zones in firing section
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
Heating control	The heating part is powered by multiple AC contacts in groups to reduce the transient current impact of the equipment on the grid.
Control Mode	Phase shifting power + solid state relay over zero trigger method
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
Computer Control System	Use DCS control system, intelligent temperature controller control , industrial computer monitor, industrial computer(windows 10) 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
	If the furnace is not in working condition, it will be in holding condition. The holding temperature is manually down-transmitted and automatically down-transmitted at regular intervals with selected process parameters for temperature rise.