Reciprocating feeding device of circulating fluidized bed boiler burning biomass

Abstract

The invention discloses a reciprocating feeding device of a circulating fluidized bed boiler burning biomass. The reciprocating feeding device is mainly composed of a speed reducer, a hopper, a charging barrel, a feeding piston and a foundation bottom plate, wherein the hopper is located above the charging barrel, the speed reducer is connected with the feeding piston by a connecting rod and connecting rings, a rocker arm is located on the speed reducer, the charging barrel is internally provided with a slideway, the feeding piston is composed of a sliding connecting rod, pulley supports and pulleys, the pulleys are connected with the pulley supports, and the feeding piston can carry out reciprocating motion along the slideway; balancing bottom springs are arranged on the upper part of the foundation bottom plate, a bracket and a speed reducer bottom plate are arranged on the upper part of the balancing bottom springs, the speed reducer and the charging barrel are located above the speed reducer bottom plate; and a charging barrel casting and a sealed main pipe are arranged at the front part of the charging barrel, and the sealed main pipe is composed of a sealed header and sealed branch pipes. According to the reciprocating feeding device disclosed by the invention, the technical problems that when the biomass circulating fluidized bed boiler burns a biomass fuel, the feeding is blocked and accumulated are solved, the positive pressure in a furnace chamber is overcame, so that the biomass fuel can successfully enter into the furnace chamber to burn, and the feeding equipment is burned out by back-scurried high-temperature smoke which is formed by deflagration of materials in a feed inlet is effectively avoided, so that the safe operation of the boiler is ensured.

Description

technical field [0001] The invention belongs to the technical field of feeding systems for circulating fluidized bed boilers, and relates to a reciprocating feeding device for biomass-fired circulating fluidized bed boilers. Background technique [0002] With the society's increasing demand for energy, looking for a renewable alternative energy has become the focus of society's general attention, and biomass energy is a renewable energy. Currently available biomass fuels have a common feature, that is, a high volatile content of the combustible base (over 80%), a low bulk density of the fuel, and the characteristics of being easy to ignite and burn. [0003] At present, the furnace feeding system of the biomass circulating fluidized bed boiler is designed so that the material enters the feeder from the silo through the screw feeder, and is evenly sent into the furnace through the sealing air and the broadcasting air. Due to the accumulation of biomass fuel The density is sm...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems caused by the biomass circulating fluidized bed boiler feeding device in the prior art, and provide a reciprocating feeding device for the biomass circulating fluidized bed boiler to solve the problem of biomass circulating fluidized bed boiler The technical problem of feed blockage and accumulation when the boiler burns biomass fuel effectively prevents the high-temperature flue gas caused by the deflagration of the material at the feed inlet from returning and burning the feeding equipment, ensuring a safer operation of the boiler

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