CN201121888Y

CN201121888Y - Backfire type biomass energy granular fuel boiler

Info

Publication number: CN201121888Y
Application number: CNU2007200145858U
Authority: CN
Inventors: 万国阳
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-17
Filing date: 2007-09-17
Publication date: 2008-09-24
Anticipated expiration: 2017-09-17

Abstract

The utility model relates to a boiler, in particular to an inverse combustion type boiler by using biomass granules fuel. A hearth is provided with an oven port; a water pipe grate is arranged on the bottom of the hearth to separate from a secondary combustion chamber; a reflecting arch and a secondary wind pipe are arranged in the secondary combustion chamber. In the inverse combustion type boiler, the hearth is provided with the oven port and the water pipe grate, thus the biomass granules fuel is bespreaded on the grate from upper side of fire through the oven port. Under traction of draught fan subpressure, the air and the fuel are burned in the inverse way; the fire and the combustion product move downwards against the direction of fuel charge. The added raw fuel does not touch with the fire, thereby steady combustion working condition and the noncoking are ensured. The secondary combustion chamber is only provided with a refractory concrete reflecting arch and a bidirectional shear secondary wind pipe, thereby complete burnout is ensured, the smoke gas nodulation is completely avoided, the exhausting of smoke and dust is reduced, and the undefiled smoke exhausting and the environmental protection are implemented. The failure-free operation of the boiler is ensured by experiments.

Description

Reverse combustion type biomass energy particle fuel boiler

Affiliated technical field

The utility model relates to a kind of boiler, especially is the boiler of fuel with the biomass energy particle.

Background technology

The boiler of existing biomass energy particle fuel be mostly adopt the mode of just burning or under raise mode, when just the burning mode adds fuel, destroyed just in necessary conditions of burning such as aflame temperature, oxygen supplys, make the combustion conditions instability, there is the phenomenon of smoldering the local short time, and is difficult to solve ash content high-temperature coking and flue gas dross phenomenon; Though lower feeding can solve above-mentioned deficiency, lower feeding needs power transmission after all, and mechanical moving element is arranged, and has not only increased operating cost, the more inevitable fault chance that exists.

Summary of the invention

The purpose of this utility model is in order to overcome the high and positive burning boiler operating mode problem of unstable of lower feeding boiler failure rate, a kind of reverse combustion type biomass energy particle fuel boiler to be provided, and stable combustion condition is guaranteed clean smoke evacuation, environmental protection and boiler failure-free operation.

The utility model realizes that the technical scheme that above-mentioned purpose adopted is: reverse combustion type biomass granule fuel boiler, have fire door on the burner hearth, and burner hearth bottom has water pipe grate and secondary combustion chamber to separate, and secondary combustion chamber is provided with reflection arch and secondary air channel.

Described reflection arch is the refractory concrete reflection arch.

Described burner hearth is equipped with diesel fuel burner outward, and diesel fuel burner is communicated with by in pipeline and the burner hearth.

Described water pipe grate diameter is Φ 30-40, and the inclination angle is the 20-30 degree.

Between described flue outlet and the chimney smoke exhaust pipe is housed, air-introduced machine is housed on the smoke exhaust pipe.

The utility model burner hearth is established the water pipe grate of fire door and big inclination angle minor diameter, biomass energy particle fuel is paved with on grate by the top of fire door from flame, under the traction of air-introduced machine negative pressure, air, the reverse burning of fuel, flame, combustion product deviate from the reinforced operation that is directed downwards.The raw material and the flame that add do not come in contact, and have guaranteed the stable of combustion conditions; The water pipe grate of minor diameter with just contact in burnt fuel, directly absorb the fuel heat, controlled flame temperature, when flame temperature does not reach the temperature that makes the ash content coking, therefore ash content begins to leave fuel and flame along with fuel combustion process separates with fuel gradually, can not coking; For guaranteeing the abundant after-flame of fuel, the utility model is in secondary combustion chamber, do not establish heating surface, only establish refractory concrete reflection arch and double direction shear secondary air channel, guarantee to be in all the time after fugitive constituent is separated out under the state of high temperature, oxygen supply, mixing obtaining abundant after-flame, stopped the flue gas dross, add many places dilatation reduction of speed, reduce soot emissions, realized clean smoke evacuation; Fuel in the after-flame burner hearth when wanting banking, have little time and by high temperature sintering lime-ash, clean out after flame-out.Fuel (initial) burning again relies on and to be located at the outer diesel fuel burner of burner hearth and to light by connecting pipe, when avoiding lighting a fire because the fire box temperature low fuel can not after-flame and over-emitting black exhaust.After flame temperature was normal, burner was flame-out, can prolonged and repeatedly use by the protection of negative pressure cold wind.The utility model the experiment proved that boiler failure-free operation; Biomass energy particle fuel is abundant after-flame in boiler, avoids the high-temperature coking and the flue gas dross of combustion process ash content, has realized clean emission, environmental protection.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is Fig. 1 right view.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further specified.

As Fig. 1, reverse combustion type biomass granule fuel boiler shown in 2, have fire door 3 on the burner hearth 5, burner hearth is equipped with diesel fuel burner 4 outward, diesel fuel burner is communicated with by in pipeline and the burner hearth, burner hearth 5 bottoms have water pipe grate 6 and secondary combustion chamber to separate, water pipe grate diameter is Φ 38, the inclination angle is 23 degree, secondary combustion chamber is provided with refractory concrete reflection arch and double-shear secondary air channel, biomass energy particle fuel is paved with on the grate 6 in burner hearth 5 by fire door 3, incipient combustion relies on the diesel fuel burner that is located at outside the burner hearth to light by connecting pipe, and flame passes grate and comes downwards to secondary combustion chamber 2 through reflection arch 8 reflections and 7 stirrings of double direction shear secondary air channel, oxygen supply, mix abundant after-flame.Flue dust is in 9 sedimentations of dilatation dust-settling compartment, and lime-ash is equipped with smoke exhaust pipe through clean-out door 1 cleaning between flue outlet and the chimney, and air-introduced machine is housed on the smoke exhaust pipe, and clean flue gas drains into the chimney emptying by air-introduced machine 10.

Claims

1, reverse combustion type biomass granule fuel boiler has fire door on the burner hearth, flue is arranged at the body of heater top, it is characterized in that: burner hearth (5) bottom has water pipe grate (6) and secondary combustion chamber (2) to separate, and secondary combustion chamber is provided with reflection arch (8) and secondary air channel (7).

2, reverse combustion type biomass granule fuel boiler according to claim 1 is characterized in that: reflection arch (8) is the refractory concrete reflection arch.

3, reverse combustion type biomass granule fuel boiler according to claim 1 is characterized in that: the outer diesel fuel burner (4) that is equipped with of burner hearth (5), diesel fuel burner is communicated with by in pipeline and the burner hearth.

4, reverse combustion type biomass granule fuel boiler according to claim 1 is characterized in that: water pipe grate (6) diameter is Φ 30-40, and the inclination angle is the 20-30 degree.

5, reverse combustion type biomass granule fuel boiler according to claim 1 is characterized in that: between body of heater top flue outlet and the chimney smoke exhaust pipe is housed, air-introduced machine (10) is housed on the smoke exhaust pipe.