Anti-blocking sealing double feeding device for biomass circulating fluidized bed gasification furnace

Abstract

The invention discloses an a anti-blocking sealing double feeding device for a biomass circulating fluidized bed gasification furnace, and belongs to the field of biomass gasification coupled power generation. The anti-blocking sealing double feeding device comprises a support frame, a silo top dust collector, a weighing anti-blocking silo, a first-stage material-taking screw and a second-stage material-taking screw; a silo body is fixedly mounted on support legs on the support frame by support lugs, weighing sensing elements are mounted between the support lugs and the support legs; a load-bearing activator comprises two load-bearing activation screws horizontally arranged at an interval, and the two load-bearing activation screws are horizontally distributed inside the silo body; and twocameras are fixedly mounted at the upper parts of the sidewalls of the silo body, and the bottom of a material-dropping opening communicates with the upper portion of the first-stage material-takingscrew. The invention has the beneficial effects that the purpose of interlock control on material feeding is achieved by using the weighing sensing elements and the cameras to detect the feeding stateof fuel, sending information to a material-feeding belt controller and controlling the material feeding speed of a material-feeding belt at a proper position.

Description

technical field [0001] The invention relates to the field of biomass gasification coupled power generation, in particular to an anti-blocking and sealing double feeding device for a biomass circulating fluidized bed gasification furnace. Background technique [0002] my country is a large agricultural country, and the output of agricultural straw is huge, which is difficult to deal with. Biomass direct-fired power plants are one of the major users. However, due to the characteristics of straw difficult to break, small specific gravity, low energy density, easy arching, and bridging, a small amount of straw is generally blended in the fuel of biomass direct-fired power plants, with a ratio of about 30%. In order to consume the huge output of agricultural straw, since 2017, relevant national departments have successively issued a number of incentive policies for straw power generation. Among them, biomass circulating fluidized bed gasification coupling power generation techno...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems in the prior art that the biomass feeding device is easy to build bridges in the silo, easy to block the conventional screw conveying, discontinuous feeding of the feed inlet in front of the furnace, and mutual channeling of air and gas, the present invention provides a biomass The anti-blocking and sealing double feeding device of circulating fluidized bed gasifier includes a support frame, a dust collector on the top of the bin, a weighing anti-blocking bin, a primary feeding screw and a secondary feeding screw. The weighing anti-blocking silo, the primary reclaiming screw and the secondary feeding screw are distributed on the support frame from top to bottom; above the dust collector on the top of the warehouse is the inlet of the feeding device, and the secondary feeding screw The outlet is connected to the inlet of the gasifier; the weighing and anti-blocking silo is a figure-eight structure, including the silo body, lugs, weighing sensing elements, load-bearing activators, cameras, maintenance manholes and discharge ports. The warehouse body is fixedly installed on the legs of the support frame through lugs, and the load sensing element is installed between the lugs and the legs; the load-bearing activator includes two horizontally arranged And the load-bearing activation spirals separated by a certain distance, the two load-bearing activation spirals are horizontally distributed inside the warehouse body, the two cameras are fixedly installed above the inner side wall of the warehouse body, and the maintenance manhole is installed on the At the position above the load-bearing activation screw on the side wall of the silo body, the bottom of the discharge port is connected to the upper part of the first-stage reclaiming screw, and the outlet below the dust collector on the top of the silo is connected to the upper part of the weighing anti-blocking silo. entrance connection

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