Regenerative Furnace Structure and Work Principle

This machine host is boiling baking furnace, structure displayed as chart 2. Work principle as follows, old sand processed by sand separator fall down like rain, then it preheated by ascendent hot air current and flow into boiling room. High temperature air in mixing room boils and bakes old sand through several nozzles on boiling board. Make covered colophony starts burning and reach for regeneration. Accompany with continuous old sand increase, baking sand moves in many “~” type movements under clapboard function. It ensures that lingering time for baking sand stays inside of the furnace and makes resin film burnt completely. Baking sand impact and rub with each other during boiling and regenerate further. Micro-powder in the recycling sand is collect by dust catcher through dust-catching pipe under boiling function.

1. Sand-falling Grid 2. Strap Machine 3. Magnetic Strap Wheel 4. Vibration Crusher 5. Skip Hoist 6. Old Sand Storeroom 7 Round Disc Feeder 8 Skip Hoist 9 Boiling Baking Furnace 10 Efficient Heat Exchanger 11 Cooling Hoist 12 Dust Catcher
1.3 Main Technical Index of Complete Set of Equipment
Productivity :1t/h~1.5 t/h
Burning Consumption（diesel）:≦17Kg/t sand（not installed heat exchanger）
Power Consumption : ≦12Kwh/t sand
Renewable Sand Out-Furnace Temperature:60℃~620℃
Renewable Sand Temperature :≦40℃
Gas Temperature :≦100℃

Chart1. Boiling Resin Sand Recycling Device
Old sand preprocessing part is consisted of magnetic strap machine, vibration crusher, skip crane and old sand storeroom. Waste sand falls on magnetic strap machine through grid, then separated by strap wheel sand iron then add into vibrating crusher. Crushed sand block is less than 3mm, and transported to old sand storeroom.
Boiling baking furnace is consisted of round disc feeder, skip hoist and boiling furnace. Round disc feeder, under old sand storeroom, discharges old sand in certain quantity equally. Then skip hoist raise them into upper of the furnace and then put them into the furnace to bake for regeneration.
Recycled sand after processing part is consisted of efficient heat exchanger and cooling crane. High temperature recycled sand which comes out from the surface flows into efficient heat exchanger. The heat exchanger reduces the sand temperature. So the temperature of ventilated high pressure air is increased. The recycled sand which reduced temperature is hoisted by crane and then stored. Preheated high pressure air returns to mixing room of the furnace to utilize redundant heat.