Coal dust conveying device leakage monitoring and early warning device and method

Abstract

The invention discloses a coal dust conveying device leakage monitoring and early warning device and method. The leakage monitoring and early warning device comprises distributed temperature sensitive optical fibers which are wound and adhered on the external wall of a conveying steel pipe. The conveying steel pipe is externally wrapped by a heat insulation layer and a protective sleeve. The conveying steel pipe is divided into multiple continuous monitoring areas along the axis. The protective sleeve in each monitoring area is externally provided with a jacket. The two ends of the jacket stretch into the protective sleeve and the heat insulation layer and then are connected with the conveying steel pipe in an adhesive way. The jacket and the external wall of the conveying steel pipe form an enclosed pressure detection cavity. In the pressure detection cavity, an optical fiber grating vibration sensor is arranged on the external wall of the conveying steel pipe, and an optical pressure sensor is installed in the heat insulation layer. Leakage of the coal dust conveying device caused by holes or cracks at the early stage of leakage can be accurately judged and early warning can be performed, leakage of the coal dust conveying device caused by friction of the coal dust in conveying can also be accurately judged and the leakage points can be accurately captured and located and early warning can be performed so that safe production of enterprises can be ensured.

Description

technical field [0001] The invention relates to a leakage monitoring and early warning device and method for a pulverized coal conveying device, in particular to a device and method for monitoring and early warning whether a pulverized coal conveying device used in a coal-to-oil / gas process leaks. Background technique [0002] For the coal-to-oil / gas industry, safe production is the top priority of the enterprise. When implementing the coal-to-oil / gas process, the raw coal must first be sent to the raw coal bunker through a belt conveyor, and after grinding, drying, and sorting, it will be made into coal powder with a particle size of 63 microns to 500 microns, and the coal powder will be transported by low-pressure nitrogen. To the pulverized coal storage bin, and then transported to the reaction device by high-pressure nitrogen. The maximum conveying capacity of the current pneumatic conveying line - pulverized coal conveying device can be as high as 160 tons / bar / hour. I...

AI Technical Summary

Problems solved by technology

From the actual operation, it can be found that due to the existence of the insulation layer, when the pulverized coal conveying device leaks due to wear and tear, it is difficult for the safety inspectors to detect it with the naked eye. In addition, this manual inspection method not only cannot guarantee the safety , also seriously affects the production efficiency of the enterprise. In order to ensure production safety, the factory usually adopts the method of stopping production for maintenance, and uses an ultrasonic flaw detector to conduct ultrasonic flaw detection along the pipeline, but this method has low efficiency, heavy workload, and poor real-time performance.

[0004] At present, some enterprises use traditional point pressure sensors to monitor the leakage of pulverized coal, but it can be seen from the actual implementation that because the pulverized coal conveying device is long, the location of the leakage is very random, so this technology cannot Leakage is monitored and can only be detected after the leak has occurred, lacking early warning capabilities

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