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Direct Coal-fired Hot Air Furnace

Operating Preinciple

MBZ direct coal-fired hot air furnace consists of MBL coal fired machine, high temperature urifying room and air mixing room.

Bituminous coal (soft coal) is fed into coal hopper through coal feeder. The coal at a certain height is delivered into buring hearth of coal burner by chanin grate. Combustion fan sends air into burner, hot gas produced by burning coal erupts from fire outlet of coal burner and enters in high temperature purifying room.The cinder is discharged from the other side of coal burner by cinder conveyor.

Hot gas enters in high temperature purifying room and begins secondary combustion. The dust in the gas impact, aggregate and subside in the prifying room. Clean hot air from purifying room at about 1000 deg. C then mixes into a certain amount of fresh air, the mixture at the wanted temperature flows in to dryer(such as spray tower, rotary dryer, oven, drying house, flash dryer, fluidized bed etc.)to dry material. Temperature of hot air can be adjustable according to the demand. When hot air is supplied continuously, its temperature fluctuates within±5 deg.C.

Specifications of Hot Air Furnace

Model	Rated output (X10000 Kar/hr)	Rated coal consumption(kg/hr)	Sistalled power(kw)	Area occuied
MBZ-25	25	50	2.8	Based on the actual conditions
MBZ -50	50	100	3.5
MBZ -75	75	150	3.5
MBZ -100	100	200	4.3
MBZ -125	125	250	4.3
MBZ -150	150	300	6.8
MBZ -200	200	400	7.9
MBZ -250	250	500	8.5
MBZ -300	300	600	8.8
MBZ -350	350	700	8.8
MBZ -400	400	800	10.8
MBZ -450	450	900	10.8
MBZ -500	500	1000	10.8
MBZ -550	550	1100	15.5
MBZ -600	600	1200	15.5
MBZ -700	700	1400	19.5
MBZ -800	800	1600	26.5
MBZ -900	900	1800	26.5
MBZ -1000	1000	2000	36.6
MBZ -1200	1200	2400	43.6
MBZ -1300	1300	2600	43.6
MBZ -1400	1400	2800	43.6
MBZ -1500	1500	3000	43.6
MBZ -1600	1600	3200	43.6
MBZ -1800	1800	3600	52.4
MBZ -2000	2000	4000	52.4

Advantagesof Hot Air Furnace

1.Heat efficiency>95%;

2.Operate simply, adjust easily;

3.High security, there is no danger of explosion;

4.Durable, low operating cost, easy maintenance;

5.Hot air is very clean, dust content:25-1320mg/Nm3;

6.Sufficient combustion, there is no balck smoke, good operation conditions;

7.All the hot air flows into dryer, there is no increased outlet during production process;

8.Hot air temperature below 900 deg.C can be adjustable easily. When hot air is supplied cntinuously, its temperature fluctuates within±5 deg.C.

Applicationsof Hot Air Furnace

1.Feedstuff: less, granular feedstuff, DCP, feedstuff additives and so on;

2.Ceramics:ceramic powder(polished tile),glaze,pottery,kaolin and so on;
3.Daily-use Chemical:power detergent, PAA, layer sodium metasilicate, 4A zeolite etc.
4.Other Material:rubber,silica gel,acetylene cylinder,paper mold,ore powder briquette wook and so on;

5.Building materials:quartz sand(for glass), phosphogypsum, sludge desiccation, effluent disposal, solid residue etc.

6.Fertilizers:compound fertilizer,DAP, MAP,potassium choride, potassium sulfate,potassoum magnesium sulfate etc;

7.Chemicls:potassium fluoride,dye(activated, deoxidize), PAC, CaCl2, Fe2(SO3),zinc oxide,alumina,fluorite powder etc;

8.For environmental protection:back liquor(lignin),posphogypsum,sludge desiccatin,effluent disposal,solid residue etc.

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