A micro-negative pressure biomass gasifier with adjustable feed

Abstract

The invention discloses a micro negative pressure biomass gasifying furnace with the adjustable feeding amount. A gas inlet amount and biomass feeding amount gas-solid feed linkage device is used for adjusting the speed of the gasifying furnace so as to solve the problems that the biomass feeding amount of a current gasifying furnace is limited, and the combustion degree can not be controlled. The gasifying furnace comprises a stove, a centrifugal fan, a gasifying furnace body, a feeding tank, a positive pressure material cutting-off valve, a biomass feeding pipe, a contactor vacuum meter, a combustor, the gas-solid feed linkage device, partition plates, a negative pressure control valve and a six-way valve. An electric contact combined pressure and vacuum gauge and a bypass magnetic valve are in linkage to achieve constant micro negative pressure, and therefore the gasifying furnace improves the combustibility of fuel while ensuring that fuel gas is not leaked; by means of the gas inlet amount and biomass feeding amount gas-solid feed linkage device, the speed of the gasifying furnace can be adjusted; meanwhile, biomass can be fed continuously; by means of the six-way valve, the phenomena that ignition is not proper to carry out under the negative pressure and the fuel gas leaks can be avoided, the use rate of the fuel is increased, energy is saved, and emission is reduced.

Description

technical field

[0001] The invention relates to a biomass gasification furnace, in particular to a micro-negative pressure biomass gasification furnace with adjustable feeding. Background technique

[0002] Biomass gasifier is an important biomass energy conversion and utilization device. It can burn straw, rice husk, branches, wood chips, weeds and other crop wastes as raw materials to obtain flammable gas. Biomass gasifier usually includes: biomass feeding mechanism, ignition device, air inlet device, slag discharge mechanism, dust removal structure, etc. In the gasifier, the biomass and the air entering the furnace undergo partial oxidation reactions to produce CO, CH 4 、H 2 and other flammable gases, accompanied by tar and solid residues.

[0003] At present, several problems faced by the biomass gasifier are: (1) The volume of the biomass furnace body limits the combustion time of the biomass, and the gas production time is short; (2) The leakage of gas during venti...

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