Continuous feeder for biomass fine particle stock

Abstract

The invention is a fine organism-particle material continuous feeder used for fluidized gasification furnace, composed of a spiral transporter and a bunker, where the bunker is arranged at a feed inlet of the spiral transporter and there is a setting gauge arranged above the feed inlet. Because of the setting gauge arranged, it realizes stable and continuous feeding, thus beneficial to the normal working of the organism gasification furnace. In a discharging transition pipe cocked upwards, the material falls backwards because of the deadweight and the spiral transporter pushes the material to advance forwards along the discharging transition pipe, thus making the material full of the discharging transition pipe and making the filling density in the transition pipe largely increased, but also able to continuously feed the material to cause the fluidized gasification furnace and the feeder are sealed and separated and sealing furnace.

Description

technical field [0001] The invention relates to a feeder for a biomass fine particle material gasification system, in particular to a continuous feeder for a biomass fine particle material used in a fluidized gasification furnace. Background technique [0002] At present, the furnace types used in domestic biomass gasification mainly include downdraft fixed-bed gasifier and fluidized gasifier. The downdraft furnace is mainly suitable for the gasification of hard straw raw materials, and the production capacity of this furnace type is small, which cannot meet the needs of large-scale gasification. The fluidized gasifier is suitable for fine-grained biomass raw materials, and can realize large-scale biomass gasification production. [0003] In the gasification technology of biomass fine particle materials, the fluidized gasifier system must ensure the continuous and stable addition of raw materials and maintain a good system seal to achieve the normal...

AI Technical Summary

Problems solved by technology

The fluidized gasifier usually adopts the feeding method of the screw conveyor. Since the biomass fine particle materials such as sawdust and crop straw crushed materials are relatively loose, the accumulation weight is small, and the fibers are slender, there will be shed material bridging in the hopper. Phenomenon, affecting the continuous delivery of materials, the sealing between the fluidized gasification furnace and the hopper is very poor, so that the gasification device cannot operate continuously and stably

When the system adopts negative pressure operation, the gasification medium will enter the fluidized gasifier from the screw conveyor, resulting in unstable factors such as channel flow and bias flow of the fluidized bed, resulting in failure of gasification in the fluidized gasifier Normal operation; when the system adopts positive pressure operation, the gas in the fluidized furnace escapes from the screw conveyor, making it difficult for materials to enter the fluidized furnace, and often causes the materials in the hopper to burn, and even a fire occurs, affecting Normal operation of fluidized gasifier

Therefore, due to bridging and shed materials, the previous fluidized gasifiers could not continuously feed biomass fine particle materials (usually particle size ≤ 8mm) such as crushed crop straw, so that the fluidized gas The application of the gasification furnace in the gasification technology of crop straw as raw material is limited or even unusable

Images