A Study on Application and Comparison of Warehousing Systems in Coal Storage and Transportation

摘要

A new enclosed rectangular flat bottom silo was proposed based on the requirements of energy conservation and environmental protection. Its storage capacity can reach 270,000 m~3. And its capacity of automatic discharging or feeding system can reach 1400t/h for bulk solids including higher moisture content or difficult flowing materials. The conical bottom silo and the flat bottom silo were separately applied in an engineering study of warehousing systems of coal. Taking the development on enclosed warehousing system of coal in the new coal chemical recycling economy project of a company as an example, the comparative analysis was carried out for different warehousing systems. It was concluded that the circular bottom silo had little loss of storage capacity and higher space utilization than the conical bottom silo. But both of them had the potential risk of agglomeration and obstruction. Although it had a little disadvantage in land occupation, the enclosed rectangular flat bottom silo could solve the problems of agglomeration and obstruction compared with the former two. In the conditions of equal spatial dimensions, the enclosed rectangular flat bottom silo had almost same space utilization with the domed silo, but was the lowest cost. Meanwhile, some advantages were obtained as below. It is easy to implement the classification of storage for multi-coal and store or reclaim four kinds of coal at the same time. It reduced the moisture of coal feeding into gasifier and energy consumption during coal carbonization, because the drier materials of the surface layer could be got when reclaiming. The precipitated water in the end of silo could be discharged by trench located in the bottom. And it could be directly as the clean waste water to be reused for the production and so on.