Measurement device of pulverized coal mass flow meter

Abstract

The invention relates to a measurement device for measuring the mass flow of high-pressure dense-phase gas-solid two-phase flow. The measurement device is applied to on-line measurement of the flow of in-furnace pulverized coal in a pulverized coal gasification process. The measurement device of a pulverized coal mass flow meter comprises a Venturi tube, a temperature meter, a density meter, a differential pressure meter and a pressure meter, wherein the Venturi tube is connected to a pulverized coal conveying pipe and is arranged on a vertical rising pipeline of the pulverized coal conveying pipe; the density meter and the temperature meter are sequentially mounted at the front end of the Venturi tube; the high-pressure tapping end and the low-pressure tapping end of the differential pressure meter are connected with an inlet of the Venturi tube and a throat pipeline respectively; the pressure meter is connected to the high-pressure gas inlet end of the differential pressure meter. The measurement device has the beneficial effects that the pulverized coal mass flow meter is a gas-solid two-phase flow measurement instrument; particularly in the pulverized coal transportation process, the in-furnace pulverized coal in a pulverized coal gasification device can be measured on line, and the device is more accurate in measurement, stable in performance and easy to maintain, so that the ratio of oxygen to coal can be automatically controlled, and the aims of stably operating a system and reducing consumption are achieved.

Description

technical field [0001] The invention relates to a measuring device for measuring the mass flow rate of a high-pressure dense-phase gas-solid two-phase flow, which is suitable for on-line measurement of the flow rate of pulverized coal entering a furnace in a pulverized coal pressurized gasification process. Background technique [0002] In pulverized coal pressurized gasification technology, the accurate measurement of the pulverized coal mass flow into the furnace is of great significance to the economical and safe operation of the gasifier. By accurately measuring the mass flow rate of pulverized coal under the condition of high-pressure dense-phase conveying on-line, the oxygen-coal ratio in the gasification process can be effectively controlled, so that the gasification efficiency can be optimized, and safety accidents and accidents caused by the imbalance of oxygen-coal ratio in the gasification process can be prevented. Problems such as deterioration of process indicat...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the flow measurement of pulverized coal in the pulverized coal gasification device cannot be accurately measured and the measurement is unstable. The principle of the pressure drop generated when passing through the Venturi tube can measure the flow of pulverized coal online. Its structure is simple and easy to maintain, its performance is reliable and stable, its measurement accuracy is relatively high, and its cost is relatively low to save costs.

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