Powder selecting and collecting device

Abstract

The invention discloses a powder selecting and collecting device, which comprises a powder selecting pipe and a powder collecting pipe, wherein the upper part of the powder selecting pipe is provided with a feeding hole; the lower end of the powder selecting pipe is provided with a discharging hole; the powder selecting pipe and the powder collecting pipe are communicated with each other; the powder selecting pipe is arranged obliquely to the horizontal surface; the included angle alpha between the powder selecting pipe and the horizontal surface is more than or equal to 45 degrees and less than or equal to 90 degrees; the powder collecting pipe is arranged horizontally; the lower end of the powder selecting pipe is provided with an air inlet; the powder collecting pipe is provided with an air outlet far away from one end which is communicated with the powder selecting pipe; and the air outlet is connected with a draught fan. In the device, high air speed required by a powder selecting process of a centrifugal separating technology is not required, the aims of selecting powder and subsequently collecting powder can be fulfilled by setting the air speed at 2 meters per second in the powder selecting pipe, and the energy consumption is lowered; mostly importantly, powder selection and powder collection are performed in the powder selecting pipe and the powder collecting pipe which are communicated with each other but are not interfered with each other, so that the influence of airstream flow during centrifugal separation on powder collection is avoided, and the powder selecting and powder collecting efficiencies are increased; and the overall pressure loss of the device does not surpass 100 Pa which is only 5-10 percent of the pressure loss of the conventional centrifugal separation powder selecting system, and the energy-saving effect is remarkable.

Description

technical field [0001] The invention relates to a gas-solid separation device, in particular to a device for selecting and collecting powder. Background technique [0002] Industrial powder separation is a common process in the modern industrial production process. It is widely used in metallurgy, chemical industry, cement, food and other industries. In the cement industry alone, raw materials, clinker and raw coal are ground, and the annual powder selection can reach nearly 5 billion tons, for such a huge amount of powder selection, more than 60% of the electric energy in the cement production process is consumed in the powder making and powder selection process. [0003] At present, powder separators are widely used in powder manufacturing industries such as cement production. So far, the development of powder separator has gone through the following three generations: [0004] The first generation of powder separator, that is, centrifugal powder separator, was invented ...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the powder selection equipment in the prior art uses the centrifugal principle to select powder and needs to be equipped with a high wind speed, which leads to increased energy consumption of the system, wear and tear on the equipment at the same time, and increases the loss along the pipeline. The centrifugal separation and powder selection of the powder selection equipment are carried out in the same high wind speed environment, which may easily cause the airflow during the centrifugal separation to affect the powder selection settlement, which will affect the powder selection efficiency, and then provide a wind separation with high precision and high air separation efficiency. High-efficiency powder selection and collection device with low energy consumption and little wear on equipment

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