Charcoal making device of recycle device of biomass circulating fluidized bed gasifier

Abstract

The invention discloses a charcoal making device of a recycle device of a biomass circulating fluidized bed gasifier. The charcoal making device is characterized in that a feeding device is arranged on a riser of the circulating fluidized bed gasifier; an air distributor and a wind cap are arranged in a bottom hearth; the two ends of an fume exhaust pipe are respectively arranged together with theupper ends of the riser and a cyclone separator; the two ends of a returning pipeline are respectively arranged together with the riser and the fluidized bed discharging hole of a fluidized recycle device; a partition is welded on the front and rear inner walls of the fluidized recycle device; the bottom of the fluidized recycle device is provided with an air distributor and a wind cap; the upperand lower ends of an ash exhaust pipe are respectively arranged together with an ash exhaust port and the ash inlet of a spiral ash cooler. The air volumes of a return air chamber and a fluidized airchamber are adjusted by changing the frequency of a fluidized fan; a return pressure measuring device and a fluidized pressure measuring device are arranged at pressure measuring points respectivelyto monitor the fluidizing state in the recycle device; the spiral ash cooler is controlled through regulating a motor in order to ensure the appropriate amount of materials in the recycle device, andprevent coking caused by poor fluidization of the materials or too little material recycling in the recycle device.

Description

technical field [0001] The invention relates to a biomass circulating fluidized bed gasification furnace, in particular to a biomass circulating fluidized bed gasification furnace return feeder charcoal production device. Background technique [0002] Biomass circulating fluidized bed gasifier, as an efficient and fast biomass energy conversion technology, is getting more and more attention and application. More and more attention has been paid to the design and production of biomass circulating fluidized bed gasifiers with different structures. The pyrolysis effect of using crushed biomass powder as raw material for biomass gasifiers is better, which is beneficial to the full use of plant straw in agricultural production. , Waste incineration for power generation and domestic gas use, which saves energy, prevents environmental pollution, and exerts positive social and economic benefits. [0003] However, for some existing pyrolysis reaction systems of fluidized bed biomass...

AI Technical Summary

Problems solved by technology

[0003] However, for some existing pyrolysis reaction systems of fluidized bed biomass gasification, the biomass powder will be brought to the cyclone ash removal device by the high-temperature carrier gas if the biomass powder stays in the high-temperature gasification furnace at 800°C for a short period of time. , which makes the biomass coke collected in the cyclone ash removal device reach 20%-30%. This part of the biomass coke contains 2% ash, and the rest is mainly the fixed carbon in the biomass. The fixed carbon is due to the need The pyrolysis reaction will generate energy under high temperature conditions, and there are still technical obstacles to its secondary recycling, resulting in low thermal efficiency of the vaporizer

Images