An Experimental Device for Studying Rake Tooth Design

Abstract

The invention discloses an experimental device for researching the design of rake teeth, which comprises a hob and its drive assembly, and rake teeth installed on a rake truss above the hob. ° fan-shaped disk, a fan-shaped extension platform is also provided on one side of the fan-shaped disk, the fan-shaped extension platform coincides with the center of the fan-shaped disk, and the radius of the fan-shaped extension platform is 1 / 3 to 1 / 2 of the radius of the fan-shaped disk. The device of the invention has low experimental cost, small error, small equipment occupation area, high reliability, simple and convenient operation, and saves time and effort.

Description

technical field [0001] The invention relates to an experimental device for coal chemical industry, in particular to an experimental device for researching the design of rake teeth. Background technique [0002] In recent years, low-rank coal upgrading technology has been widely valued by the society, and many domestic institutions are developing low-rank coal upgrading technology and key equipment. Some enterprises have built 300,000 tons / year low-rank coal upgrading industrial demonstration plant. The key equipment includes drying furnace, pyrolysis furnace and chilling plate, and the device is in good condition. Through reasonable rake tooth design (rake tooth structure and layout), multiple channels are formed on the furnace plate, and the channels are connected by rake teeth. When the coal passes through the rake teeth, the radial position changes, that is, it enters the next channel. After the action of multiple rakes, the coal is finally moved from the outer channel (...

AI Technical Summary

Problems solved by technology

The design of the rake teeth is relatively complicated, and there are many influencing factors. The angle, length, position, quantity, and speed of the hob of the rake teeth will all affect the movement state of the coal.

At present, the design of the rake teeth in the 300,000 tons / year low-rank coal upgrading device is obtained by building a 5:1 overall model for experiments, but due to the amplification effect, there are risks in applying the experimental data to industrial devices

At the same time, the industrial scale has expanded from 300,000 tons / year to 1 million tons / year, and the size of key equipment in the device has more than doubled. If the rake teeth are still designed according to the reduced experimental model method, there will be a greater risk; 1:1 overall model experiment is used to design rake teeth, the experimental data can be directly applied to the design of rake teeth, the risk is small, and a complete set of material conveying device is required, which occupies a large area and the cost of the experiment is too high

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