Material-plug-type spiral feeder

Abstract

The invention discloses a material-plug-type spiral feeder. The material-plug-type spiral feeder comprises a machine shell and a spiral shaft, wherein a compression area and a material plug area are arranged in the machine shell; the spiral shaft is rotationally installed in the compression area; the compression area is provided with a feeding port and an output end; the material plug area is provided with an input end and a discharging port; the feeding port is located in the top of the machine shell; the output end of the compression area is communicated with the input end of the material plug area; the spiral shaft is provided with a central shaft and a spiral vane, the screw pitch of the spiral vane is gradually increased in the conveying direction, and the diameter of the central shaft is gradually reduced in the conveying direction; an arc curved surface is arranged in the machine shell and surrounds the outer side of the lower portion of the spiral shaft, and the inner diameter of the arc curved surface is gradually reduced in the conveying direction. The conveying push force of the spiral shaft can be increased, so that the spiral shaft conveys materials more smoothly. The space between the spiral shaft and the bottom wall of the compression area is reduced, and compression force on materials can be increased so that the materials can be completely compressed. The sealing performance for a fire door by means of the material plug formed by the compressed materials is improved, and the materials are prevented from accumulating in the compression area.

Description

technical field [0001] The invention relates to the field of feeding equipment, in particular to a plug-type screw feeder. Background technique [0002] The feeding equipment of incinerators (such as boilers, gasifiers, etc.) that use biomass as fuel generally have the problem of backfire. There is high-temperature flue gas or combustible gas in the furnace. If these high-temperature gases are ejected from the feeding equipment, it is called tempering. Because the ignition point of biomass raw materials is low, it is very easy to catch fire. When tempering occurs, it may cause a fire. If high-temperature combustible gas is ejected, it may cause an explosion accident. The difficulty in preventing tempering is to ensure continuous feeding while ensuring no tempering. It is feasible to form a plug at the outlet of the screw feeder. However, the existing feeders often cannot fully compress the material, and the poor compressibility of the material cannot form an effective mate...

AI Technical Summary

Problems solved by technology

However, the existing feeders often cannot fully compress the material, and the poor compressibility of the material cannot form an effective material plug.

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