CN102748754A

CN102748754A - Biomass boiler

Info

Publication number: CN102748754A
Application number: CN2012102587270A
Authority: CN
Inventors: 郭成军
Original assignee: ZHANGQIU YULONG MACHINE CO Ltd
Current assignee: ZHANGQIU YULONG MACHINE CO Ltd
Priority date: 2012-07-25
Filing date: 2012-07-25
Publication date: 2012-10-24

Abstract

The invention relates to a biomass boiler. According to the biomass boiler, a hearth is positioned on the middle lower part of the boiler, a combustion chamber is arranged in the hearth, and an igniter is arranged in the combustion chamber; the lower side of the combustion chamber is pivoted with a turnable ash overturn cover, and an annular air supply cavity is coated and formed outside the combustion chamber; the side wall between the annular air supply cavity and the combustion chamber is provided with a plurality of blasting holes which are obliquely downwards arranged along an air supply direction, and the annular air supply cavity is connected with a fan; and the upper part of the hearth is provided with a heat exchange cavity, a smoke exhaust array is arranged in the heat exchange cavity, and the outer side of the smoke exhaust array is provided with a water drum. An optimal combustion mode of suspension and semi-gasification combustion of biomass particles is adopted to the biomass boiler, a humanized design is taken as an idea, and all-weather temperature control autoignition or time control autoignition is matched, so that the biomass boiler has the characteristic of high combustion efficiency.

Description

A kind of biomass boiler

Technical field

The present invention relates to the boiler technology field, specifically a kind of biomass boiler that is used for the biomass burning granular fuel specially.

Background technology

Along with the rise of biomass fuel, also be pushed to the market to supporting various boilers with biomass granule fuel.Present biomass boiler is a purpose of design with the direct burning of straw, chip mainly, and it is big to have a volume, the characteristic that efficiency of combustion is low.At present; Utilize the granular fuel of straw, chip preparation to have higher calorific value; But the kind of supporting with it biomass boiler also is not a lot, can not satisfy the needs of use, and needing exploitation to be fit to a biological particles fuel more is the boiler dedicated of fuel.

Summary of the invention

The object of the present invention is to provide a kind of biomass boiler, act as a fuel, have efficiency of combustion height, characteristics that thermal conversion efficiency is high with biological particles.

The present invention solves the technical scheme that its technical problem takes: a kind of biomass boiler, comprise burner hearth and heat exchange chamber, and it is characterized in that,

Said burner hearth is positioned at the middle and lower part of boiler, and a combustion chamber is installed in said burner hearth, and the combustion chamber is a tubular, and in the combustion chamber, is provided with an igniter; Said combustion chamber upside is installed a fuel and is added pipe; Downside articulates the turnover tepetate that turns over; Coat annular air supply chamber of formation in the outside of said combustion chamber; On the sidewall between annular air supply chamber and the combustion chamber, be provided with some air blast hole, said air blast hole is tilted to down setting along air supply direction, and said annular air supply chamber links to each other with blower fan; Be provided with in the bottom of burner hearth by motor-driven helical axis ash discharge mechanism, below said combustion chamber, be provided with a rotating shaft, an eccentric wheel is installed in the rotating shaft; Said eccentric wheel is resisted against and turns over the tepetate downside; When eccentric wheel rotates, turn over tepetate one and open one and close, be used to discharge the ashes in the combustion chamber; Said rotating shaft is connected through the chain transmission with helical axis in the ash discharge mechanism;

The top of said burner hearth is heat exchange chamber, is provided with the smoke exhaust pipe array in the said heat exchange chamber, and is the water bag in the outside of smoke exhaust pipe array.

Also comprise a feed bin, said feed bin medium dip is provided with a screw feeder, and said screw feeder adds the pipe feeding to fuel.

Be provided with circuitous baffle plate in the flue between above-mentioned burner hearth and heat exchange chamber, be used for reducing the soot particulates of flue gas.

The invention has the beneficial effects as follows:

1, this biomass boiler is theory with the human oriented design, cooperates automatic igniting of round-the-clock temperature control or time control to light a fire automatically.

2, auto feed, fall back automatically, automatic ash removing, whole process need not artificial control.

3, adopted biological particles best combustion mode: suspension, half gasification, and combustion.

4, three backhaul heat exchanges have reduced exhaust gas temperature.

5, depositing dust, smokeless combustion in the stove of uniqueness demonstrates good environmental protection characteristics.

Description of drawings

Fig. 1 is the A--A cutaway view of Fig. 2;

Fig. 2 is the B--B cutaway view of Fig. 1;

Fig. 3 is an I place partial enlarged drawing among Fig. 1;

Among the figure: 1 burner hearth, 2 heat exchange chambers, 21 smoke exhaust pipe arrays, 22 water bags, 23 baffle plates; 24 chimneys, 3 feed bins, 31 screw feeders, 4 combustion chambers, 41 igniters; 42 fuel add pipe, and 43 turn over tepetate, 44 annular air supply chambeies, 45 air blast holes, 5 helical axis ash discharge mechanisms; 51 rotating shafts, 52 eccentric wheels, 53 chain transmissions, 54 side plates, 6 blower fans.

The specific embodiment

Like Fig. 1～shown in Figure 3, a kind of biomass boiler comprises burner hearth 1, heat exchange chamber 2 and feed bin 3.

Burner hearth 1 is positioned at the middle and lower part of boiler, and a combustion chamber 4 is installed in burner hearth, and the combustion chamber is a tubular, and in the combustion chamber, is provided with an igniter 41, and the combustion chamber is the main place of granular fuel burning.In hearth wall, be provided with heat-insulation chamber.

Combustion chamber 4 upsides are installed a fuel and are added pipe 42, are used to add granular fuel.Combustion chamber 4 downsides articulate the turnover tepetate 43 that turns over, and turn under tepetate 43 normal conditions to be in closure, open when needing ash discharge.4 the outside coats and forms an annular air supply chamber 44 in the combustion chamber, on the sidewall between annular air supply chamber 44 and the combustion chamber, is provided with some air blast hole 45, and air blast hole 45 is tilted to down setting along air supply direction, and the annular air supply chamber links to each other with blower fan 6.In the process of air blast, gas shock is upwards turned back after turning over tepetate 43, stirs granular fuel and is in suspended state, and during ash discharge simultaneously, air-flow blows downwards, and ash discharge is more thorough.Be provided with in the bottom of burner hearth 1 by motor-driven helical axis ash discharge mechanism 5, critical piece is a helical axis, and an end of helical axis is by motor-driven, and other end ash discharge is to the outside.4 belows, combustion chamber are provided with a rotating shaft 51; An eccentric wheel 52 is installed in the rotating shaft, and this eccentric wheel is resisted against and turns on the tepetate 43, when eccentric wheel 52 rotates; Turning over tepetate one opens one and closes; Be used to discharge the ashes in the combustion chamber, rotating shaft is connected through chain transmission 53 with helical axis in the ash discharge mechanism, uses a motor can accomplish ash discharge worker work.Motor is in step ash discharge state under the control of control system.Burner hearth bottom is a V-arrangement, is made up of two side plates 54, and helical axis ash discharge mechanism 5 wherein is positioned at the bottom of V-arrangement, the collection of convenient ash.

Feed bin, feed bin 3 medium dips are provided with a screw feeder 31, and screw feeder adds pipe 42 feedings to fuel, and the motor of screw feeder can be realized the feeding that batch (-type) is quantitative under the control of control system.

The top of burner hearth is heat exchange chamber 2, is provided with smoke exhaust pipe array 21 in the heat exchange chamber, and is water bag 22 in the outside of smoke exhaust pipe array; On boiler jacket, be provided with the water inlet and the delivery port that link to each other with the water bag, and link to each other through circuitous flue with heat exchange chamber at burner hearth, flue is to be formed by circuitous baffle plate 23; Through making a circulation repeatedly; Dust granule in the flue gas can fall through bump, and the feature of environmental protection is better, and last flue gas is discharged through chimney 24.

The course of work is: granular fuel gets into feed bin; The screw feeder of feed bin 3 lower ends (temperature control or time control) is transported to fuel particle in the combustion chamber; Igniter 41 (temperature control or time control) is igniting automatically; Under the blower fan blasting action, fuel particle is in suspended state in combustion chamber 4, increases and the air contact area; Because the little temperature of the volume in the combustion chamber is high, fully burning; The lime-ash that produces, with automatic (temperature control or the time control) folding of turning over tepetate 43 (by eccentric wheel control), the bottom of falling burner hearth 1 can the discharge section lime-ash when one of helical axis ash discharge mechanism and eccentric wheel rotating shaft are rotated.In addition, when boiler quit work, (temperature control or time control) startup ash discharge helical axis ash discharge mechanism 5 carried out ash discharge to boiler automatically.The heat that produces in the burner hearth descends with the baffle plate tendency after meeting baffle plate 23 with the flue gas rising, and in the decline process, wind direction changes and realizes the one-time dedusting process; Hot blast continues between baffle plate upper edge and lower house upper wall, to move ahead then, and when touching the furnace wall, wind direction changes once more, and another produces dust removing effects; Continue to be forwarded to the heat exchange chamber cup, at this moment, wind speed and direction all changes, and produces the one-time dedusting effect again; Hot blast continues to move ahead, and gets into the smoke exhaust pipe array 21 of heat exchange chamber, carries out sufficient heat exchange at this and water bag, gives the water heating of outside; Get into chamber behind the heat exchange chamber then, produce the one-time dedusting effect once more; Last flue gas is discharged with exhaust opening.Each stage all has heat exchange to produce in the hot blast running, and last lower box all has water circulation system, so that carry out heat exchange more fully, the hot water after the heat exchange is collected at last and got into hot duct together.

Except that the described technical characterictic of specification, be the known technology of those skilled in the art.

Claims

1. a biomass boiler comprises burner hearth and heat exchange chamber, it is characterized in that,

2. a kind of biomass boiler according to claim 1 is characterized in that, also comprises a feed bin, and said feed bin medium dip is provided with a screw feeder, and said screw feeder adds the pipe feeding to fuel.

3. a kind of biomass boiler according to claim 1 and 2 is characterized in that, is provided with circuitous baffle plate in the flue between said burner hearth and heat exchange chamber.