Coal mill pulverized coal fineness online monitoring method

Abstract

The invention discloses a coal mill pulverized coal fineness online monitoring method; according to a pre-established model, during running, the coal mill dynamic separator revolving speed, the coal mill inlet primary air volume, the coal feeder coal-feeding quantity, the coal mill current, the coal Hardgrove grindability index and other parameters are acquired through a DCS system for estimating the fineness of current pulverized coal, and the reference is provided for the operation of a pulverizing system; the online monitoring method is used in the pulverized coal furnace pulverizing system, the outlet pulverized coal fineness can be monitored, and the economy is better compared with that of a system without monitoring the fineness; the method only utilizes DCS data, fire coal daily records and other related records in existing operation data, has no need of special sampling and measuring devices, is simple and practical, and avoids the problems of abrasion and blocking of sampling and measuring devices in an existing pulverized coal fineness physical measurement method.

Description

technical field [0001] The invention relates to an on-line monitoring method for pulverized coal fineness of a coal mill, specifically a method for monitoring the fineness of the current pulverized coal according to the operating parameters of the coal mill, which belongs to the technical field of electric power and power engineering; it is based on the previously established The model estimates the current pulverized coal fineness through parameters such as the speed of the separator in the pulverizing system of the DCS system, the amount of coal fed, the primary air volume at the entrance of the coal mill, the unit consumption of the coal pulverizer, and the coal grindability index. System operation provides reference. Background technique [0002] In boiler equipment, coal pulverizers are usually used to grind coal into coal powder before coal combustion to improve combustion efficiency. The finer the pulverized coal, the lower the carbon content of the ash and the highe...

AI Technical Summary

Problems solved by technology

However, in the current engineering application, there is no online measurement of coal fineness, so real-time adjustment is not possible, so that the fineness of coal powder deviates from the optimal value, the pulverized coal is too fine, the power consumption of pulverization is high, and the pulverized coal is too coarse. Low combustion efficiency, both of which will lead to lower economical boiler operation

Images