Application of LHJ-S Controllable Screw Dryer in Coal Slurry Drying I. Abstract: The main working principle and structural composition of LHJ controllable screw dryer are introduced; and its practical application and use in slime drying The method is briefly described.
Second, the key words: LHJ type controllable spiral dryer coal slime application 1, preface With the implementation of the national sustainable development strategy, the rational development and comprehensive utilization of coal and mineral resources has become an important issue, originally used as waste idle stacking It is imperative to fully exploit and utilize the coal slag. The use of valuable slag coal resources to turn waste into treasure can not only produce considerable economic benefits, but also solve a series of problems of coal mining and land occupation and pollution. Under normal circumstances, the moisture content of coal slime is high (20%-30%), it cannot be used directly, and it is not convenient for storage and transportation in winter. If it is dried and dehydrated, the slime can be directly used for boiler combustion and power generation, and it can supply coal to China. Tensions can help ease. LHJ type controllable spiral dryer 丗 In recent years, it adopts new technologies of comprehensive utilization of thermal energy at home and abroad, and integrates other drying equipments to develop a new generation of large-scale drying equipment. Suitable for drying and dewatering of slime and various concentrates.
2, LHJ type controllable spiral dryer working principle: LHJ type controllable spiral dryer 丗 use heat transfer medium (heat transfer oil 簦) through the casing to indirectly dry the material 悳 drying equipment. The working principle is as follows: the material is continuously propelled and stirred by the specially designed crucible in the body of the dryer, and the high-temperature heat-conducting oil indirectly heats the material through the jacket of the cylinder mainly by heat conduction and heat radiation, thereby continuously causing moisture in the material. It absorbs heat and evaporates to achieve dry dewatering. After the high-temperature heat-conducting oil passes through the dryer body, the temperature is lowered and then enters the heating furnace to heat up and cycle. This greatly improves the comprehensive utilization of heat energy, reduces the drying cost, and improves the drying efficiency. Environmental requirements. During the drying process, the drying time is adjusted by adjusting the speed of the screw shaft to control the drying moisture.
3, LHJ type controllable screw dryer structure: LHJ type controllable screw dryer system mainly consists of inlet and outlet device, drying body, motor, reducer, electronic control system, heat transfer medium circulation pipeline system, heat transfer medium heating device , insulation facilities, safety devices ç°¦ composition.
4, LHJ type controllable spiral dryer main features: (1), indirect closed heating, environmental protection and energy saving, reducing material losses. (2), investment province, small footprint, less supporting civil works. (3), reliable operation, simple operation, convenient maintenance, safe and durable. (4), dry moisture can be controlled, zui can be as low as 2%, suitable for a wide range of materials. (5) The temperature in the drying process is uniform, which ensures that the material quality does not change. (6), continuous work, large processing capacity.
5. Application of LHJ type controllable spiral dryer: The water content of the coal slurry of Jinshu Group Gushuyuan is still close to 30% after dewatering by flotation and pressure filtration; because the water content is high, the user cannot directly use it, the price does not go up, and Winter transportation is likely to cause freezing, which seriously affects loading and unloading. After the slime is dried and dehydrated, the aforementioned problems can be solved. And the price can be greatly increased. After more than half a year of investigation and demonstration, combined with the experience and lessons learned from coal slurry drying in recent years, Zui chose Shandong Weifang Tianjie Environmental Protection Technology Co., Ltd. to produce 悳LHJ type controllable screw dryer as the slime drying equipment of the plant.
6, LHJ type controllable screw dryer technical requirements: (1), processing capacity: 5 ~ 8T / h (2), feed moisture content ≤ 30% (3), discharge moisture content 5 ~ 18% (adjustable) (4), working heat transfer medium : Heat transfer oil, working temperature 240-280 degrees Celsius, zui high temperature 350 degrees Celsius. (5), heating fuel: coal seam gas (heat value 9000 kcal / Nm3)
7, LHJ type controllable spiral dryer heat balance calculation: material (sludge) balance - S-1T heat balance (ton / hour) (omitted)
8, controllable spiral dryer equipment selection: (1) dryer: LHJ-5 type controllable spiral dryer (2) heating furnace: 1200KW gas heat transfer oil boiler.
9. Project situation: The drying project was completed in 2005, and a trial run was successful, and the production was achieved in the same month. Since the production started, the equipment has been running stably, and the actual technical parameters have reached the original design requirements. Among them, the moisture content of the slime after drying is controlled at 15%, the working temperature of the heat transfer oil is stable between 250-260 °C, and the actual consumption of gas. The amount is about 130-140 Nm3/h, and the drying cost is about 20 yuan/ton. After drying, the price of slime rose by more than 200 yuan per ton.
10. Precautions The drying process of the drying equipment should be carried out under closed conditions. The materials must be filled with no large inclusions to prevent the blades from getting stuck. When using, it must be strictly in accordance with the "LHJ type controllable screw dryer safety operation procedures" operation, pay attention to the order of opening and closing, in order to prevent accumulation.
11. Conclusion After nearly one year of actual production and application, the LHJ-type controllable screw dryer fully demonstrates its advanced nature and stability in the field of slime drying, and has achieved significant economic benefits.
Second, the key words: LHJ type controllable spiral dryer coal slime application 1, preface With the implementation of the national sustainable development strategy, the rational development and comprehensive utilization of coal and mineral resources has become an important issue, originally used as waste idle stacking It is imperative to fully exploit and utilize the coal slag. The use of valuable slag coal resources to turn waste into treasure can not only produce considerable economic benefits, but also solve a series of problems of coal mining and land occupation and pollution. Under normal circumstances, the moisture content of coal slime is high (20%-30%), it cannot be used directly, and it is not convenient for storage and transportation in winter. If it is dried and dehydrated, the slime can be directly used for boiler combustion and power generation, and it can supply coal to China. Tensions can help ease. LHJ type controllable spiral dryer 丗 In recent years, it adopts new technologies of comprehensive utilization of thermal energy at home and abroad, and integrates other drying equipments to develop a new generation of large-scale drying equipment. Suitable for drying and dewatering of slime and various concentrates.
2, LHJ type controllable spiral dryer working principle: LHJ type controllable spiral dryer 丗 use heat transfer medium (heat transfer oil 簦) through the casing to indirectly dry the material 悳 drying equipment. The working principle is as follows: the material is continuously propelled and stirred by the specially designed crucible in the body of the dryer, and the high-temperature heat-conducting oil indirectly heats the material through the jacket of the cylinder mainly by heat conduction and heat radiation, thereby continuously causing moisture in the material. It absorbs heat and evaporates to achieve dry dewatering. After the high-temperature heat-conducting oil passes through the dryer body, the temperature is lowered and then enters the heating furnace to heat up and cycle. This greatly improves the comprehensive utilization of heat energy, reduces the drying cost, and improves the drying efficiency. Environmental requirements. During the drying process, the drying time is adjusted by adjusting the speed of the screw shaft to control the drying moisture.
3, LHJ type controllable screw dryer structure: LHJ type controllable screw dryer system mainly consists of inlet and outlet device, drying body, motor, reducer, electronic control system, heat transfer medium circulation pipeline system, heat transfer medium heating device , insulation facilities, safety devices ç°¦ composition.
4, LHJ type controllable spiral dryer main features: (1), indirect closed heating, environmental protection and energy saving, reducing material losses. (2), investment province, small footprint, less supporting civil works. (3), reliable operation, simple operation, convenient maintenance, safe and durable. (4), dry moisture can be controlled, zui can be as low as 2%, suitable for a wide range of materials. (5) The temperature in the drying process is uniform, which ensures that the material quality does not change. (6), continuous work, large processing capacity.
5. Application of LHJ type controllable spiral dryer: The water content of the coal slurry of Jinshu Group Gushuyuan is still close to 30% after dewatering by flotation and pressure filtration; because the water content is high, the user cannot directly use it, the price does not go up, and Winter transportation is likely to cause freezing, which seriously affects loading and unloading. After the slime is dried and dehydrated, the aforementioned problems can be solved. And the price can be greatly increased. After more than half a year of investigation and demonstration, combined with the experience and lessons learned from coal slurry drying in recent years, Zui chose Shandong Weifang Tianjie Environmental Protection Technology Co., Ltd. to produce 悳LHJ type controllable screw dryer as the slime drying equipment of the plant.
6, LHJ type controllable screw dryer technical requirements: (1), processing capacity: 5 ~ 8T / h (2), feed moisture content ≤ 30% (3), discharge moisture content 5 ~ 18% (adjustable) (4), working heat transfer medium : Heat transfer oil, working temperature 240-280 degrees Celsius, zui high temperature 350 degrees Celsius. (5), heating fuel: coal seam gas (heat value 9000 kcal / Nm3)
7, LHJ type controllable spiral dryer heat balance calculation: material (sludge) balance - S-1T heat balance (ton / hour) (omitted)
8, controllable spiral dryer equipment selection: (1) dryer: LHJ-5 type controllable spiral dryer (2) heating furnace: 1200KW gas heat transfer oil boiler.
9. Project situation: The drying project was completed in 2005, and a trial run was successful, and the production was achieved in the same month. Since the production started, the equipment has been running stably, and the actual technical parameters have reached the original design requirements. Among them, the moisture content of the slime after drying is controlled at 15%, the working temperature of the heat transfer oil is stable between 250-260 °C, and the actual consumption of gas. The amount is about 130-140 Nm3/h, and the drying cost is about 20 yuan/ton. After drying, the price of slime rose by more than 200 yuan per ton.
10. Precautions The drying process of the drying equipment should be carried out under closed conditions. The materials must be filled with no large inclusions to prevent the blades from getting stuck. When using, it must be strictly in accordance with the "LHJ type controllable screw dryer safety operation procedures" operation, pay attention to the order of opening and closing, in order to prevent accumulation.
11. Conclusion After nearly one year of actual production and application, the LHJ-type controllable screw dryer fully demonstrates its advanced nature and stability in the field of slime drying, and has achieved significant economic benefits.
Ganzhou Green days Biochemical Technology Co., Ltd. , http://www.cn-gangdao.com