A safe and environmentally friendly pulverized coal preparation system and preparation method

Abstract

The invention provides a safe and environment-friendly pulverized coal preparation method and system, comprising the steps of: collecting the pulverized coal A produced in the raw coal drying process and a part of the pulverized coal B produced in the grinding process in a first pulverized collector (5 ); Another part of pulverized coal C in the grinding process is collected in the second pulverizer (10); Utilize negative pressure pipeline A to pulverized coal from the first pulverizer (5) and the second pulverizer ( 10) After being sucked out, it is transported. The present invention combines the traditional two-step dry pulverization process and the method of negative pressure pneumatically conveying pulverized coal, aiming to solve the problem that pulverized coal storage tanks and pulverized coal in the pulverization system are prone to spontaneous combustion and explosion in the process of preparing pulverized coal by the existing dry method, thereby To achieve the purpose of safe and environmentally friendly powder milling and powder storage.

Description

technical field [0001] The invention belongs to the field of coal processing, and relates to a pulverized coal preparation technology using raw coal as a raw material, in particular to a safe and environment-friendly pulverized coal preparation, pulverized coal vacuum transportation, pulverized coal storage system and method. Background technique [0002] my country is the world's largest coal producer and also a major coal consumer. In 2013, the national coal output was about 3.7 billion tons, and the annual consumption reached 3.61 billion tons. In my country's energy consumption structure, coal consumption accounted for 65.7% of primary energy consumption in 2013. my country's coal-based pattern determines that clean and efficient coal processing and utilization methods must be adopted to solve energy problems. [0003] Pulverized coal combustion has brought about a revolution in coal combustion. For example, pulverized coal boilers save more coal than traditional coal-f...

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Problems solved by technology

[0014] In view of the defects in the prior art, the purpose of the present invention is to provide a safe and environmentally friendly pulverized coal preparation system and preparation method to solve the problem of spontaneous combustion and explosion of pulverized coal storage tanks and pulverized coal in the pulverization system in the existing dry method of pulverized coal preparation. question

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