Built-in biomass screw feeder

Abstract

The invention relates to a feed device, in particular to a built-in biomass screw feeder. In the invention, a material bin is arranged above a taper feeder, and a blanking device is arranged in the material bin; biomass continuously enters the taper feeder through the blanking device and continuously enters a combustion device or a gasification device through a reducing twisting cage in the taperfeeder; the material bin, the blanking device and the taper feeder form an integrated structure, and a blanking rod of the blanking device can be disassembled; and the biomass is uniformly stirred bythe blanking rod after the biomass enters the material bin. The invention realizes that the biomass continuously enters the taper feeder and solves the problems of bridging, winding, and the like of the biomass in a material hopper; meanwhile, because the device adopts a taper feed mode, the biomass is compressed because a flow area is continuously reduced after the biomass enters the taper feeder, thus the stacking density is greatly increased; and meanwhile, the pressure obstructing and the wind stopping between the combustion device or the gasification device with the feeder are realized, thereby the influence on feeding, which is caused by air stringing between the combustion device or the gasification device and the feeder, is avoided.

Description

technical field [0001] The invention relates to a feeding device, in particular to a built-in biomass screw feeder suitable for feeding a combustion device or a gasification device. Background technique [0002] my country is extremely rich in biomass energy, and the amount of agricultural biomass waste resources such as crop straws is 7x10 8 t / h, equivalent to 3.5x10 8 t standard coal, forestry residue about 1.5x10 8 t / h, equivalent to about 0.7x10 standard coal 8 t. The use of biomass energy achieves CO 2 The balance of absorption and emissions is highly competitive for meeting more stringent decarbonization requirements in the future. Biomass gasification can convert low-grade energy into high-grade energy, and is the best choice for biomass energy utilization. At present, the furnace types used in domestic biomass gasification generally include fixed-bed gasifiers and fluidized-bed gasifiers. However, the fixed-bed gasifier has not been widely used due to the shor...

AI Technical Summary

Problems solved by technology

Biomass has the characteristics of loose structure, low bulk density, high fiber content, slender fibers, and mutual adhesion, which makes it easy to cause problems such as shed material and entanglement during the feeding process, which affects the continuous transportation of biomass and makes the gasification device and Poor airtightness between the feeders affects the normal operation of the feeders

Poor sealing between the feeder and the gasification device will cause a series of problems: when the system is in negative pressure operation, it will cause air to enter the combustion device or gasification device through the feeder, affecting the combustion device or gasification device. The entire flow field causes the gasifier to run away from the design direction. When the system is in positive pressure operation, the gas from the combustion device or gasification device will escape through the feeder, making it difficult for the material to enter the gasifier. In severe cases, it may cause fuel, fire

[0004] Due to factors such as loose biomass structure, low bulk density, high fiber content, slender fibers, and mutual adhesion of the existing gasification device feeder, problems such as shed material and entanglement in the feeding process cannot be realized. Continuous feeding

This limits the application of biomass gasification to a large extent, and even the biomass gasification that cannot be realized normally

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