Operating principle
MBL coal-burning hot air furnace consists of MBL coal burner, hot gas purifying chamber, and air mixing chamber. Coal burner supplies the primary heat. Raw (soft) coal is fed into the coal hopper through the coal feeder. The coal at a certain height is delivered by chain grate into the burning chamber of coal burner. With the help of combustion fan, hot semi-coal gas produced by burning coal erupts from fire outlet of coal burner and enters in hot gas purifying chamber. The chamber is built of fire resistant materials; hot semi-coal gas begins secondary combustion in purifying chamber. The particles impact, aggregate and drop in the purifying chamber. Clean hot air from purifying chamber at about 1000℃ then mixes into a certain amount of cool air, the mixture at the suitable temperature flows into dryer(such as spray tower, rotary kiln, oven, drying house,  flash dryer, fluidized bed etc.)for drying. Temperature of hot air can be adjustable according to the demand. When hot air is supplied continuously, its temperature fluctuates between ±5℃. Cinder is discharged from the other side of coal burner by tapping machine.

Advantages

（1）、No black smoke. Meet the demand of environmental protection. No secondary pollution, good operating conditions.

（2）、Hot air is very clean, dust content is between 25 to 120 mg/Nm³

（3）、heat efficiency >95％

（4）、Temperature of hot air under 1000℃ can be adjustable easily. When hot air is supplied continuously, its temperature fluctuates between ±5℃.

（5）、Operate simply, adjust easily.

（6）、High security, there is no danger of explosion.

（7）、Equipment is durable, low cost of operation, easy maintenance.

Applications

Detergents: powder detergent, detergent additives etc..

Ceramics: ceramic powder, glaze, pottery, kaolin etc.

Fertilizers: compound fertilizer, DAP, MAP, potassium chloride, potassium sulfate etc..

 Chemicals: alumina, polyaluminium chloride, chemical additives, water purifying agent，ferric sulfate etc.

Building materials: ceramic fibre, insulation board, insulation cotton, superfine powder, sand etc.

For environmental protection: sludge desiccation, effluent disposal etc.

Others: briquette, wood, lees, foodstuff, feedstuff, acetylene cylinder, rubber, silica gel, paper mold etc.

Our customers

Detergents: Zhejiang Nice Group      Nafine Group    German Henkel Detergent Co., Ltd.     Guangzhou Liby Group    Nanjing Jiahe Daily-use Chemical Co., Ltd.     Hangzhou Kao Transfar Co., Ltd.   Dongguan Weiliang Industrial Co., Ltd

Ceramics: Yunnan Lincang Boda Kaolin Co., Ltd.(kaolin)    Huizhou Huangci Ceramic Co., Ltd.(ceramic powder)    Hangzhou Minsheng Ceramic Co., Ltd.(pottery)

Fertilizers: Sino-Arab Chemical Fertilizer Co., Ltd.( compound fertilizer)    Zhonghua Kailin Group (DAP)    Qinghai Salt Lake Sanyuan Kalium Fertilizer Co., Ltd.( potassium sulfate)     Guizhou Chuanheng Chemical Co., Ltd.(MAP, calcium phosphate monobasic)    

Chemicals: Daqing Wantong Chemical Factory (chemical additives)    Nanning Chemical Group(polyaluminium chloride)    CAS Shanxi polyaluminium Co., Ltd.( alumina)    Zhengzhou Sen’ao Chemical Co., Ltd.( layer sodium metasilicate)

 Building materials: Deqing Jiahe Polycrystalline Fiber Co., Ltd.( polycrystalline fiber)    Hangzhou Hongda Polycrystalline Fiber Co., Ltd.( polycrystalline fiber)

For environmental protection: Hebei Yucheng Environment Protection Co., Ltd.

Others: Xinxiang Limin Machinery Company (acetylene cylinder)    Shanxi Zonghe Briquette Co., Ltd.( briquette)    Shanghai Huaxia Fishery Machinery  and instrument Research Institute(feedstuff)    Heilongjiang Huarun Alcohol Co., Ltd.( lees)    Yanjing Beer(Guilin Liquan) Co., Ltd.( lees)    Shenzhen Wopusheng Science and Technology  Co., Ltd.( paper mold)

Specifications of hot air furnace