A device and method for conveying paste by high-pressure air

Abstract

The invention discloses a device and method for conveying pastes by utilizing high pressure air. The device for conveying the pastes by utilizing the high pressure air comprises a material slurry hopper, a filling pump, high pressure air conveying devices, a flowmeter and a PLC controller. The material slurry hopper is connected with a filling pipeline. The filling pump is arranged below the material slurry hopper. The flowmeter is arranged on the filling pipeline in the outlet direction of the filling pump. The outlet end of the filling pump is connected with one high pressure air conveying device. The filling pipeline is provided with one or more high pressure air conveying devices. According to the device for conveying the pastes by utilizing the high pressure air, the high pressure air is used as the thrust, so that the pastes are always kept in the plug-flow state in the pipeline in the conveying process, and relative movement of the interior of a column core does not happen; and through the arrangement of the multiple high pressure air conveying devices in the filling pipeline, the pastes in the pipeline are pushed and sent to the filling working surface in a relay mode. The method for conveying the pastes by utilizing the high pressure air is simple and easy to implement and high in operability, the filling technology is more simplified, and the conveying of mine filling material slurry is achieved well.

Description

technical field [0001] The invention relates to a device and method for conveying paste by high-pressure air, and belongs to the technical field of filling slurry pipeline transportation in mine filling mining. Background technique [0002] At present, many mining areas are facing the problem of coal pressing in the "three downs" (under buildings, under railways, and under water bodies) that cannot be exploited by traditional technologies. In order to fully extract the "three-down" coal resources of these mines and extend the service life, filling mining is required to liberate the "three-down" coal pressure. Paste filling refers to the method of processing gangue, fly ash, low-quality soil, urban solid waste, etc. around the coal mine into paste on the ground, and transporting it to the goaf through pipelines for filling. [0003] At present, there are two main methods of conveying mine filling slurry: gravity conveying and pump pressure conveying. Self-flow conveying has...

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Problems solved by technology

[0004] The method and device for squeezing and conveying underground filling material (Chinese patent CN96118020.X) transports the filling slurry by installing a piston-type extrusion mechanism in the filling pipeline. Similarly, there will be a large amount of filling paste left in the pipeline. In order to carry out the next filling work, this part of the paste and the pipeline have to be cleaned, which not only increases the filling cost, but also pollutes the underground environment.

[0005] Due to the existence of these problems, the application of paste filling mining technology in a wider range is limited. Therefore, it is necessary to find a new filling pipeline transportation method

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