Dry pulverized coal pressurization dense-phase transporting system and method

Abstract

The invention provides a dry pulverized coal pressurization dense-phase transporting system and method. The system comprises a normal-pressure pulverized coal storage bin, a feeding tank and a transporting pipeline for realizing operation of the system, wherein the discharge opening of the normal-pressure pulverized coal storage bin is connected with the feed inlet of the feeding tank. The systemalso comprises a weight detection component, a flow-adjustable transporting device and a control system, wherein the weight detection component is arranged on the feeding tank and is used for detecting the weight of pulverized coal in the feeding tank; the flow-adjustable transporting device is arranged on the feed outlet of the feeding tank and is used for quantitatively discharging the pulverized coal in the feeding tank; and the input end of the control system is connected with the weight detection component, and the output end of the control system is connected with the flow-adjustable transporting device and is used for regulating and controlling the pulverized coal output rate of the flow-adjustable transporting device. The transporting method is realized according to the system. Thedry pulverized coal pressurization dense-phase transporting system and method can realize stable and accurate continuous transport of the pulverized coal.

Description

technical field [0001] The invention belongs to the technical field of dense-phase conveying of powder materials, and in particular relates to a pressurized dense-phase conveying system and method for dry coal powder suitable for entrained bed gasification. Background technique [0002] Dry coal powder entrained bed gasification has developed rapidly in recent years due to its wide adaptability to coal types, high gasification efficiency, high effective gas content and meeting the requirements of large-scale. Dry coal powder pressurized dense phase transportation is the source of raw material supply for dry entrained gasification, and it is one of the key technologies that affect the continuous and stable operation of dry coal powder pressurized gasification. [0003] The pressurized dense phase conveying of dry coal powder usually adopts the semi-continuous coal feeding process of coal powder intermittent boosting and continuous feeding under pressure. Then it enters the p...

AI Technical Summary

Problems solved by technology

[0005] The existing technology can achieve stable operation of pulverized coal transportation to a certain extent, but there are at least the following problems: first, the detection process is relatively complicated and lasts for a long time; At this time, it is necessary to stop feeding again and adjust the pulverized coal transportation again. To a certain extent, it is impossible to achieve continuous and stable transportation of pulverized coal.

Finally, the pulverized coal conveying device is very large, especially the vertical height usually exceeds 50 meters, and the construction cost is high

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