System and process for coal powder preparation

Abstract

The invention relates to a system and a process for coal powder preparation, which is characterized in that the system for coal powder preparation comprises a crushing system, a drying system and a grinding system; the crushing system comprises a coal receiving hopper and a crushing machine connected with the coal receiving hopper; the drying system comprises a drying kiln, and the drying kiln is communicated with the crushing machine through a belt conveyer; the drying kiln is connected with a raw coal silo; an air inlet opening at the charging side of the drying kiln is connected with a hot blast furnace and the hot blast furnace is connected with an air blower; an air outlet opening at the top of the drying kiln is connected with a first induced draft fan and an air outlet opening of the first induced draft fan is respectively connected with a hot air pipeline and a dust collector between the drying kiln and the hot blast furnace; the grinding system comprises a vibration feeder and a coal grinding mill connected with the vibration feeder, wherein the vibration feeder is communicated with the raw coal silo through a first bucket elevator; the coal grinding mill is connected with a cyclone separator, an ascension pipe of the cyclone separator is connected to the storage silo through a second bucket elevator; and the cyclone separator is connected with a second induced draft fan and connected to the coal grinding mill. The invention not only can be applied to establish the independent coal powder preparation plant, but also can be applied in front of an industrial coal powder boiler as the stokehole powder-making unit.

Description

technical field [0001] The invention relates to a coal powder preparation system and process in front of a furnace, in particular to a coal powder preparation system and process with low dust pollution and high efficiency. Background technique [0002] Coal pulverization in the general sense is actually a kind of coal crushing and crushing processing, which belongs to the primary stage of coal pulverization. The processed coal powder has a large particle size, which can only be used for traditional industrial boilers, and cannot meet the needs of high-efficiency industrial pulverized coal boilers. The particle size requirements for fine coal powder. Moreover, most of the current general coal pulverization processes are open-type operation, the dust pollution is relatively serious, and the efficiency of the pulverization system is low. Contents of the invention [0003] In view of the above problems, the object of the present invention is to provide a pulverized coal prepa...

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Problems solved by technology

[0002] Coal pulverization in the general sense is actually a kind of coal crushing and crushing processing, which belongs to the primary stage of coal pulverization. The processed coal powder has a large particle size, which can only be used for traditional industrial boilers, and cannot meet the needs of high-efficiency industrial pulverized coal boilers. Particle size requirements for fine coal powder

Moreover, most of the current general coal pulverization processes are open-type operation, the dust pollution is relatively serious, and the efficiency of the pulverization system is low

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