Using microwave method to realize on-line detection and flow control of pulverized coal

MF3000 solid mass flowmeter coal powder conveying online detection and flow control

Mesovision: Yu Qiang, Yang Jiacheng, Ye Yanhua

Installation location: 5t / h pulverized coal steam boiler

Application: pulverized coal boiler powder feeding system

Test purpose:

1. Online monitoring and statistics of fuel through pulverized coal flow online monitoring

2. Realize the regulation and control of boiler fuel operation

Installation conditions:

The MF3000 flowmeter is installed on the horizontal powder conveying pipe between the gas powder mixer and the burner below the screw feeder. Under the action of a primary fan, the coal powder passes through the gas powder mixer and the MF3000 sensor's coal powder pipe to the burner .

Measurement process:

Through the speed of the screw feeder motor and the experience of the field engineer, we used the weighing method to obtain the reference value of the pulverized coal flow of the four air ducts, which is 20Hz / 202kg / h, 30Hz / 283kg / h, 40Hz / 379kg / h, 50Hz / 462kg / h (four different frequencies of the inverter represent four different flow values ​​of the feeder), calibrated through four reference points, and then through repeated test comparison, the flow measured by the sensor is the same as the actual The flow values ​​correspond to each other and the linear relationship is stable. In the case of 50Hz speed of the feeder, the cumulative flow rate of the flow sensor in 3545 seconds is 456.8kg <=> 463.8kg / h, the reference flow rate is 462kg / h, and the error is 1%.

to sum up:

Realizing the online monitoring of pulverized coal measurement is a necessary means to improve the accuracy of pulverized coal measurement and the reliability of operation control. In the pulverized coal transportation system, the continuous detection by the pulverized coal measurement sensor, the parameters displayed on the interface are basically consistent with the calibration parameters, and the flow curve is stable; it can intuitively understand the coal injection effect for the boiler operator in time and facilitate the detection and statistics of fuel quantity It is of great practical significance for guiding the operation and control of pulverized coal boilers and achieving energy saving and emission reduction.

The MF3000 solid mass flowmeter is widely used in powder transportation industries such as power plants, cement plants, chemical plants, tobacco plants, food, etc. with its unique measurement principles and advantages. It can achieve the measurement of solid mass flow in gas-solid two-phase flow, such as Coal powder, lime powder, cut tobacco, salt granules, plastic granules, etc.

Mesovision is a professional engineering service provider of complete sets of automation equipment. We provide customers with in-depth and high value-added services. Our original intention is not to seek short-term benefits, but based on long-term value creation. Jieke defines success as designing unique personalized services and overall solutions rather than pure product sales.

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