HARPER INTERNATIONAL Model GOU-297360-PT-THK-33-FDE, Gas Fired Pusher Furnace/Kiln System

Detailed overview of the unit

Harper Thermal System
Type: Gas Fired Pusher Type
Model No.: GOU-297360-PT-THK-33-FDE
Serial No.: AT012
Max Temp: 871C
Operating. Temp: 800°C
Fuel: Natural Gas
Capacity: 1.4 Million BTU
   
DETAILED TECHNICAL SPECIFICATIONS
Scope of Supply:
Thermal Equipment and Associated Systems
Proposed by HARPER INTERNATIONAL CORPORATION
HARPER Model GOU-297360-PT-THK-33-FDE
Hearth Pusher Kiln system consisting of the following features: 
Base case Features
* Twin hearth pusher tunnel kiln
* Natural Gas heated section
* Insulated brick and/or ceramic fiber Insulation
* High-heated section length 390 inches
* Ten (10) zones of independent control in heated section
* Gas tight entrance bellow assembly to take muffle expansion.
* Gas tight high temperature alloy process muffle for atmosphere containment
* Atmosphere sample ports in zone # 1,3,5,7,9 and two in cooling section.
* Furnace chamber temperature maximum, 800°C* Vent locations in zone #1, 2, 3 & 4
* Hearth elevation = 42 in, approximate
* Complete burner system with power supply
* Over temperature protection discrete control for each zone
* Electric power supply connection is 460V/3Ph/60Hz, 3 phase 
   
Overall Dimensions
Overall APPROXIMATE Width………      262 inches
Length……………………………………   62 feet 
Height……………………………………   140 inches
   
System Major Components
Heating Chamber
Process Muffle Entrance 
Chamber Exit Purge Chamber 
Main Twin Pusher
Exit Cross pusher and drive
   
Heating Chamber
This section shall primarily consist of a steel shell, muffle, insulation and heating source. 
The length of the heating section is divided into individual zones. All zones are fully baffled and 
have independent temperature controls. In order to achieve optimum temperature uniformity 
within the process load space, the heating chamber has sufficient room over and under the 
load for excellent cross-radiation and reflection of heat. 
  
Process Muffle 
Fabricated, fully enclosed, ‘D’ shaped, gas tight process muffle shall be installed in the heating 
chamber. 
Pusher plates, carrying crucibles filled with product, shall pass through this muffle.
Muffle Length 430 inches approx
Muffle width 35 in
Material of construction….. RA330
Construction Gas tight
Hearth material Ceramic
  
Entrance Chamber 
This kiln shall be equipped with chambers located at the entrance end the heating section and 
exit of the cooling section to reduce the ingress of air into the kiln. 
* Material of construction ……… Carbon steel.
* Separation table One (1)
* Door (Inner):
* Quantity One (1)
* Type Guillotine with Pneumatic cylinder
* Seal Pneumatic, Inflatable seal
* Material of construction carbon steel
* Purge gas Nitrogen]
* Doors (Outer):
* Quantity One (1)
* Type Pneumatic cylinder
* Seal Metal to metal
  
Exit Purge Chamber 
This kiln shall be equipped with Purge chambers located at the entrance end and exit of the 
system to reduce the ingress of air into the kiln. 
* Material of construction carbon steel
* Purge gas Nitrogen
* Doors (Outer):
* Quantity One (1)
* Type Pneumatic cylinder
* Seal Metal to metal
  
Material Handling System 
Main components of material handling systems shall be as follows.
Main Twin Pusher
Indexes the product load at a metered rate down the kiln tunnel. Two pushers shall be installed 
  side by side and shall operate independently.
Type Continuous push 
Conveyance mechanism Electro-mechanical ball screw type supported by twin linear bearings
  with hardened and ground shafts.
Dual motors: AC motor for rapid traverse approach and retract functions, DC motor for smooth
  metered variable speed continuous push.
Push rate, Nominal 90.7 in/hr
Push rate range 40 to 100 in/hr
Pusher safety overload device Included
Note:- Require new parts such as motor, gearbox and clutch.\
  
Exit Cross pusher and drive
Transfers the product load from Exit chamber to Exit purge chamber.
Conveyance mechanism Electro-mechanical 
Materials of construction Carbon steel
Registration………………………….. Limit switch
Hearth material……………………… Ceramic rails
Dump Station and Return Conveyor Pusher
Transfers the product load to return conveyor. If optional features are not purchased, Dump station shall be shipped "as is".
Conveyance mechanism Electromechanical (Ball screw)
Materials of construction Carbon steel
Traveling Table Yes
Conveyance mechanism Un-powered rollers with side guides
Material Carbon steel
Conveyor width Single load
System Utilities
  
Combustion System
The furnace heat source shall consist of a combustion system, with burners positioned to fire over and under the 
process muffle for effective heat transfer. The combustion air system shall consist of a common combustion air 
blower and pressure switch, together with an individual control valve for each furnace control zone. The system shall 
consist of a common fuel supply gas train with pressure switches, pressure gage and safety shut off valve. 
Independent burner fuel circuits shall be equipped with all appropriate manual and solenoid valves, etc., necessary 
to provide a safe and efficient system.Burner exhaust system:Harper will ship the burner (flue gas) exhaust system 
"as is". This includes all duct work and exhaust blower. Customer to install at site.Customer Utilities Required 
(Approximate)The following service and utilities are required for the proper operation of the proposed Harper Thermal 
  
System:Electrical Service
Main electrical service: 460 Volts, 60 Hz., 3 Phase, 3 wire, 
Total connected load Approximately 25 KVA 
Heating Fuel Type Natural Gas
Supply Pressure 12 psi Estimated consumption 800 SCFH
Connected 1500 SCFH Purge Atmosphere (N2) 
Quality Oxygen less than 5 PPM, Dew point –60°C 
Supply Pressure at Site 17 – 30 psig  
Supply connection 2000 scfh (To be confirmed on final design)
Compressed Air Supply Pressure at Site 90 psi
Usage Minimal
  
PRICE: $300,000