Lobe type dense phase powder pumping system

Abstract

The lobe-type dense phase powder pumping system includes a pneumatic conveying device, a conveying pipeline and a blowing aid device. The pneumatic conveying device includes a pump body. The side and bottom of the bed are respectively provided with a fluidized nitrogen pipe and a bottom-blown nitrogen pipe. The bottom-blown nitrogen pipe passes through the gasification chamber of the sending dish, and a lobe ejector is arranged at the upper end of the fluidized bed, and a mixing chamber is arranged above the lobe ejector. The upper end of the mixing tube is sealed and fixed with one end of the conveying chute, and the other end of the conveying chute protrudes upwards from the outside of the pump body. There is a feeding port on the top of the pump body, and a pressure-feeding nitrogen pipe is set on one side of the feeding port. The lobe ejector has a periodic lobe shape, and the side wall from the inlet at the lower end to the outlet at the upper end is a smooth transition structure. The ejector of the present invention has a periodic wave lobe structure, which improves air mixing and ejection performance, and the lobe ejection increases the ejection ratio by more than 4 times, and forms a dense phase transport, increases the transport volume, and reduces the splash pollution of materials entering the iron ladle.

Description

technical field [0001] The invention relates to a powdery material blowing system, which belongs to the field of material delivery, in particular to a lobe-type dense-phase powder material pumping system for transporting lime powder into an iron ladle through nitrogen to desulfurize molten steel. Background technique [0002] The material conveying pump is an important equipment in the desulfurization production process of molten steel pretreatment KR method. Its function is to transport lime powder (CaO) into the iron ladle through nitrogen injection, pressure delivery, and blowing assistance, so as to effectively desulfurize the molten iron and meet the requirements of production needs. The pump has been widely used in fly ash conveying systems such as cement and thermal power plants. Compared with traditional negative pressure powder conveying equipment, the conveying capacity of the material conveying pump has been enhanced, but on the other hand, due to its low conveyin...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a lobe-type dense phase powder pumping system, which is used to solve the problems of low conveying volume, short conveying distance and large splash pollution in the pneumatic conveying system in the prior art. The petal injector can improve the injection ratio, thereby greatly increasing the delivery volume, and at the same time, a pulse-type blowing device is installed on the delivery pipeline to avoid pipeline blockage and increase the delivery distance

Images