Dense-phase conveying pipeline for high-concentration powder

Abstract

The invention relates to a novel coaxial multi-passage powder conveying special-shaped pipeline which is composed of an outer pipe, a middle pipe, an inner pipe, an air baffling device with a baffling groove, and a wedge-shaped positioning block. High-concentration powder is pushed into the inner pipe through conveying carrying air, air film air enters a film-forming passage through the outer pipe and large holes, the direction of the air film air is corrected through the air baffling device, then the air film air enters the inner pipe through small holes and forms an air film with certain thickness near the wall of the inner pipe, and the conveying carrying air, the air film air and the high-concentration powder are converged in the inner pipe and are conveyed to a downstream work section in a slurry state under the stirring action of the air.

Description

【Technical field】 [0001] The invention belongs to the technical field of machinery. More specifically, the present invention relates to a special pipeline for high-concentration dense-phase conveyance of powder. 【Background technique】 [0002] Most of the various pipelines currently in commercial operation are limited to transporting continuous-phase fluids, and there are no pipelines that can transport fluidized dispersed-phase fluids, such as powder materials. Some production units simply use ordinary pipelines commonly seen in the market to transport fluidized powders. The raw materials have high requirements for dryness, the particle size distribution range is small, and unfavorable factors such as blockage, wear, and static electricity are greatly affected. Short-term, short-distance rare Phase transportation is barely supported, but long-distance and long-period high-concentration dense-phase transportation is unsustainable. The main reason is that the transportation ...

AI Technical Summary

Problems solved by technology

Some production units simply use ordinary pipelines commonly seen in the market to transport fluidized powders. The raw materials have high requirements for dryness, the particle size distribution range is small, and unfavorable factors such as blockage, wear, and static electricity are greatly affected. Short-term, short-distance rare Phase transportation is still barely supported, but it is difficult to sustain long-distance, long-period, high-concentration dense-phase transportation. The main reason is that the transportation pipeline is very blocked, which restricts the large-scale production of enterprises, high operating costs, and relatively low profits.

[0003] At present, double casings are commonly used in this field in the domestic and foreign markets, which can realize large-scale, long-term and long-distance transportation. They are mostly used in some power plants and cement plants. They are relatively mature powder transportation pipeline products, but they are also prone to blockage. , wear and other phenomena, and it is difficult to remove blockages. For example, powder materials such as power plant ash and cement have fine particles, large conveying volume, and pipeline blockages are prone to occur if the drying is not in place. Once blockage occurs, it will take time and effort, greatly affecting the normal production of enterprises. , In addition, the pollution of the powder to the environment is easy to solidify with the attachments and it is difficult to remove, the hazard lasts for a long time, especially for the practitioners in the powder industry, which is very harmful to the body and even life-threatening. It is becoming more and more serious. The dust produced by powder is the chief culprit of haze weather. It is very harmful and difficult to control and eliminate in a short period of time, which greatly affects the living environment of the place.

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