CN203249239U

CN203249239U - Reciprocating type feeding device for biomass-fired circulating fluidized bed boiler

Info

Publication number: CN203249239U
Application number: CN 201320276133
Authority: CN
Inventors: 李爱新; 韩明瑜; 任广星; 张正岩; 姜自龙
Original assignee: FEIXIAN SHANGYUAN THERMOELECTRIC Co Ltd
Current assignee: FEIXIAN SHANGYUAN THERMOELECTRIC Co Ltd
Priority date: 2013-05-11
Filing date: 2013-05-11
Publication date: 2013-10-23
Anticipated expiration: 2023-05-11

Abstract

The utility model discloses a reciprocating type feeding device for a biomass-fired circulating fluidized bed boiler, which is mainly composed of a reducer, a hopper, a charging barrel, a feeding piston and a foundation slab, wherein the hopper is positioned at the upper part of the charging barrel, the reducer is connected with the feeding piston via a connecting rod and a connecting ring, a rocker is positioned on the reducer, a slide way is arranged inside the charging barrel, the feeding piston is composed of a sliding connecting rod, pulley brackets and pulleys, the pulleys are connected with the pulley brackets, and the feeding piston can perform reciprocating movement along the slide way; balance bottom springs are arranged at the upper part of the foundation slab, a supporting bracket and a reducer baseplate are arranged at the upper parts of the balance bottom springs, and the reducer and the charging barrel are positioned at the upper part of the reducer baseplate; a charging barrel casting and a sealing main pipe are arranged at the front part of the charging barrel, and the sealing main pipe is composed of a sealing header and sealing branch pipes. According to the reciprocating type feeding device, the technical problems that blockage and accumulation of feedstock exist when a biomass circulating fluidized bed boiler burns the biomass fuel are solved, and the positive pressure in a furnace chamber is overcome, so that the biomass fuel is enabled to smoothly get into the furnace chamber for burning, the problem that the feeding device is burnt down due to reverse flow of high pressure flue gas formed by detonation of the material at a feed inlet is solved, and the safer operation of the boiler is ensured.

Description

The reciprocating type charging gear of a kind of biomass-burning CFBB

Technical field

The utility model belongs to CFBB feeding system technical field, relates to the reciprocating type charging gear of a kind of biomass-burning CFBB.

Background technology

Along with growing to energy demand of society, seek the focus that a kind of reproducible alternative energy source becomes social common concern, and biomass energy is a kind of reproducible energy.Present available biomass fuel has common ground, i.e. combustible basis fugitive constituent very high (more than 80%), and the fuel bulk density is little, is easy to catch fire and aptitude to burn.

At present, the stokehold feeding system of biomass recirculating fluidized bed boiler, be designed to material and enter dispenser from feed bin by screw(-type) feeder, send into uniformly burner hearth by sealing air, material seeding wind, because the biomass fuel bulk density is little, flowability is very poor, putty, fracture often appear in charging gear in running, have had a strong impact on the stable operation of boiler; Simultaneously, biomass recirculating fluidized bed boiler is operation under positive pressure, charging aperture is in the zone of positive pressure of boiler, because the biomass fuel fugitive constituent is high, it is rapid to catch fire, burn, if feed is inhomogeneous, very easily produce at material inlet and pile up deflagration, form local high malleation, cause the furnace high-temperature flue gas to return and scurry into dispenser, jeopardize the safety of feeding device.

Summary of the invention

The purpose of this utility model is the technical barrier that solves the biomass recirculating fluidized bed boiler charging gear generation of prior art, provide a kind of biomass-burning CFBB reciprocating type charging gear, the technical problem that feed stops up, piles up during with solution biomass recirculating fluidized bed boiler burning-used biologic mass fuel, and effectively prevented from burning feeding device because charging aperture materiel deflagrating formation high-temperature flue gas returns to alter, guaranteed the safer operation of boiler.

The utility model is that the technical scheme that solves the problems of the technologies described above employing is:

The reciprocating type charging gear of a kind of biomass-burning CFBB, mainly formed by reductor, hopper, barrel, feed piston and sole plate, hopper is positioned at the barrel top, reductor is connected with connecting ring by connecting rod with the feed piston; rocking arm is positioned on the reductor, it is characterized in that: described barrel inside has slideway, and described feed piston is comprised of slide link, pulley bracket and pulley; pulley is connected with pulley bracket, and the feed piston can move back and forth along slideway.

Described sole plate top is provided with spring at the bottom of the balance, and spring top has carriage and reductor base plate at the bottom of the balance, and reductor and barrel are positioned at reductor base plate top.

Described barrel front portion has barrel foundry goods and sealing house steward, and the sealing house steward is comprised of sealing header and sealing arm.

The beneficial effects of the utility model are, the reciprocating type charging gear of a kind of biomass-burning CFBB, simple in structure, processing and manufacturing is easy, assembling and easy for installation, the technical problem that feed stops up, piles up when having solved the biomass recirculating fluidized bed boiler burning-used biologic mass fuel, overcome malleation in the burner hearth, make biomass fuel enter smoothly hearth combustion, and effectively prevented from burning feeding device because charging aperture materiel deflagrating formation high-temperature flue gas returns to alter, guaranteed the safer operation of boiler.

Description of drawings

Fig. 1 is the utility model structural representation;

Spring 17, feed piston 18, carriage 19, reductor base plate among the figure 1, at the bottom of the reductor 2, rocking arm 3, connecting rod 4, slideway 5, connecting ring 6, slide link 7, pulley bracket 8, pulley 9, hopper 10, barrel 11, barrel foundry goods 12, sealing house steward 13, sealing header 14, sealing arm 15, sole plate 16, balance

The specific embodiment

With reference to accompanying drawing 1, the utility model comprises: reductor 1, hopper 9, barrel 10 and feed piston 17, hopper 9 are positioned at barrel 10 tops, and slideway 4 is positioned at barrel 10 inside, and rocking arm 2 is positioned on the reductor 1; Reductor 1 and feed piston 17 are connected with connecting ring by connecting rod 3 and are connected, and feed piston 17 is comprised of slide link 6, pulley bracket 7 and pulley 8, and pulley 8 is connected with pulley bracket 7, and feed piston 17 can move back and forth along slideway 4; Barrel 10 front portions have barrel foundry goods 11 and sealing house steward 12, and sealing house steward 12 is comprised of sealing header 13 and sealing arm 14; Sole plate 15 tops are provided with spring 16 at the bottom of the balance, and spring 16 tops have carriage 18 and reductor base plate 19 at the bottom of the balance, and reductor 1 and barrel 10 are positioned at reductor base plate 19 tops.

Operation principle of the present utility model: when reductor 1 rotates counterclockwise, feed piston 17 along slideway 4 to reductor 1 direction move, fall into like this biomass fuel of hopper 9 owing to entering hopper 9 under the action of gravitation, slow down, when 1 rocking arm 2 rotates a week, 1 rightabout moves feed piston 17 along slideway 4 to reductor, enters like this biomass fuel of barrel 10 owing to promoting to barrel foundry goods 11 directions under the effect of feed piston 17 thrusts, and reciprocating type charging gear is finished a work period.

Reciprocating type charging gear is each initiatively to stop or when again starting, feed piston 17 and reductor 1 between apart from the farthest, the return load of reciprocating type like this charging gear is lighter, less demanding to detent torque, and after each initiatively parking, the feed piston 17 of reciprocating type charging gear all is in the barrel 10 of hopper 9 front ends, and the interior pyrotechnics of rear barrel 10 biomass fuel combustion rear hearths that can effectively prevent from stopping sprays along barrel 10.

Feed piston 17 is connected with slideway by pulley 8 connections in the reciprocating type charging gear, can reduce coefficient of friction, and then reduce resistance, and the useful life of extension fixture ensures stable operation of the boiler.

Sole plate 15 tops of reciprocating type charging gear are provided with spring 16 at the bottom of the balance, can adjust the coefficient of expansion between reciprocating type charging gear and the boiler, make barrel 10 and barrel foundry goods 11 keep sealing, make the smooth and easy boiler internal that enters of biomass fuel participate in burning.

Air enters burner hearth via the sealing house steward 12 that sealing header 13 and sealing arm 14 form, and can effectively prevent from altering because barrel foundry goods 11 places materiel deflagratings formation high-temperature flue gas returns, and prolongs the service life of barrel foundry goods 11.

Although above-mentionedly by reference to the accompanying drawings the specific embodiment of the present utility model is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.

Claims

1. reciprocating type charging gear of biomass-burning CFBB, mainly formed by reductor, hopper, barrel, feed piston and sole plate, hopper is positioned at the barrel top, reductor is connected with connecting ring by connecting rod with the feed piston; rocking arm is positioned on the reductor, it is characterized in that: described barrel inside has slideway, and described feed piston is comprised of slide link, pulley bracket and pulley; pulley is connected with pulley bracket, and the feed piston can move back and forth along slideway.

2. the reciprocating type charging gear of a kind of biomass-burning CFBB according to claim 1, it is characterized in that: described sole plate top is provided with spring at the bottom of the balance, spring top has carriage and reductor base plate at the bottom of the balance, and reductor and barrel are positioned at reductor base plate top.

3. the reciprocating type charging gear of a kind of biomass-burning CFBB according to claim 1 is characterized in that: described barrel front portion has barrel foundry goods and sealing house steward, and the sealing house steward is comprised of sealing header and sealing arm.