Pressurization trace quantity helix powder feeding equipment

Abstract

The pressurized micro spiral powder feeder drives the screw shaft through drive mechanism by generators, hopper and material outlet pipe integrated under the lower surface of the support platform, featuring in its being load bore by support platform and positioned by the middle up shaft bearing, vertically going through the insert hopper of the round hole, the lower end sticking to the material output pipe in arm shape, blender at the screw shaft of the corresponding position of the conical sectional hopper, intermittently fixing two sections spiral vanes with different pitches, lower spiral vane pitch smaller than the pitch of the upper spiral vane, leaving a section of emptiness between the spiral shaft of the spiral vanes. It is simple and compact in structure, adjustable in feeding quantity, even and stable in pressurized transportation.

Description

Technical field: [0001] The invention belongs to the technical field of material conveying equipment, in particular to a micro-volume screw powder feeder for pressurizing and conveying viscous powdery materials. Background technique: [0002] "Modern Coal Chemical Technology Handbook" (Edited by He Yongde, Beijing: Chemical Industry Press, 2003, 11, page 516 and page 527) mentions that the key of dry gasification technology lies in the pressurized feed of pulverized coal. The foreign advanced technology adopts a semi-continuous coal feeding process in which two conveying lines composed of a feeder and an air lock mechanism are switched and alternated, and pulverized coal is continuously fed under indirect boost and pressure. This technology has complex equipment and high process requirements, and is suitable for pressurized transportation of pulverized coal with large flow rate (above 1t / h), but it cannot be applied to pressurized gasifiers with small amount of pulverized co...

AI Technical Summary

Problems solved by technology

The problem with this setting is: the vibration of the vibrator will inevitably drive the bearing to vibrate together, which will aggravate the wear of the bearing and the screw shaft, affect the normal rotation of the screw shaft, and reduce the service life of the system; The performance of the device is stable within the powder feeding range of 30-380g / min (1.8-22.8kg / h), and compressed air must be used to blow it when the flow rate is less than 150g / min (9kg / h), and the air-powder mixture is transported

However, if it is applied to pressurized conveying equipment for viscous pulverized coal, firstly, because there is no vibrator or stirring device in the hopper, there are problems of material accumulation and unsmooth feeding; moreover, because the air pressure on the discharge side is relatively high High, the pulverized coal in the spiral tube channel is difficult to resist the buoyancy caused by the high pressure difference, which is easy to cause the pulverized coal to escape, and it is difficult to ensure the airtight and continuous delivery of the material; in addition, the air pressure difference makes the fine powder flow to the gap of the conveyor Penetration and leakage will cause fine powder to accumulate in the sealing retaining ring at the lower end of the shaft, increasing the load, and will eventually stop the conveying, so it cannot be applied to the pressurized conveying of powdery materials

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