Coal screening machine low energy-consumption and high efficiency

Abstract

The invention provides a coal screening machine with low energy-consumption and high efficiency. The coal screening machine comprises a rack, a screen body driving mechanism and a transmission mechanism. The coal screening machine is improved as follows: screen bodies are mounted on the frame in a transverse reciprocating motion manner, the transmission mechanism is composed of a connecting rod component which can drive the screen bodies to perform reciprocating swing transversally, or is composed of a connecting rod component and a connecting lever component hinged to the frame; collision heads or hard springs which are used for colliding the screen bodies so as to enable the screen bodies to be pulled back are arranged on the frames on the two sides of each screen body or screen body bearing bodies; a multi-stage screen body structure is composed of a plurality of screen bodies which swing independently and are longitudinally arranged in a one-list and stepped manner; a plurality of sieve meshes are formed between adjacent screen strips; the sieve meshes are communicated with one another, and become larger gradually and then become smaller suddenly from the coal-in direction to the coal-out direction; the screen strips are mounted in an up and down malposed manner. The coal screening machine has the benefits as follows: the condition for reducing installed power is created, the adaptability for screening inferior coal with large ash content and high water content is improved, the requirements of screening efficiency can be met under any working condition, the coal screening machine is a such coal screening machine that mostly corresponding to a screening mechanism, and the installed power and construction cost are the lowest under the condition of same labor force consumed.

Description

technical field [0001] The invention belongs to operating machinery, and in particular relates to a sieve surface coal sieving machine. Background technique [0002] For coal-fired thermal power plants, coal screening machines are essential equipment. There are several types of coal screening machines commonly used, such as comb swing type, vibration type, and roller type. The power plant selects the corresponding type of coal screening machine according to factors such as coal quality, capacity, and cost. Although the aforementioned coal screening machines have different structures and operating methods, they have their own advantages and disadvantages in comparison. But there are still some common problems to be solved. First of all, they are all equipment with high installed power and low output capacity. Especially in China, the quality of coal is difficult to control. Coal with many impurities, high ash content and high water content is very common in thermal power p...

AI Technical Summary

Problems solved by technology

First of all, they are all equipment with high installed power and low output capacity.

Especially in China, the quality of coal is difficult to control. Coal with many impurities, high ash content and high water content is very common in thermal power plants, which brings considerable pressure to the coal screening operation and adversely affects the overall operation of the power plant.

After many years of hard work by technical workers in this industry, although some progress has been made, the goal of increasing the output of equipment without increasing energy consumption, not significantly reducing efficiency and not blocking the screen when screening low-quality coal has not yet been achieved

Images