CN201539855U

CN201539855U - Biomass gasification combustion boiler

Info

Publication number: CN201539855U
Application number: CN2009202038205U
Authority: CN
Inventors: 张建超; 尤凯军; 张瑜
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-30
Filing date: 2009-09-30
Publication date: 2010-08-04
Anticipated expiration: 2019-09-30

Abstract

The utility model relates to a biomass gasification combustion boiler which makes biomass fuels produce plenty of carbon monoxide, propane, methane, and other fuel gases through heat energy reaction by adopting the principle of fluidized combustion. The combustion boiler comprises a furnace body, an air supply device, air pipes, a feeding device and a biomass combustion device, wherein the air ducts comprise a primary air pipe and a secondary air pipe; the biomass combustion device comprises a primary air box, a secondary air duct, a combustion chamber and a cloth wind plate; the primary air box is arranged at the bottom of the combustion device, the central position of the primary air box is communicated with the feeding device, and the lower part on the side wall of the primary air box is connected with the primary air pipe through a primary air inlet; the secondary air duct is arranged on a ring-type air duct at the top of the combustion device, and tangentially connected with the secondary air pipe through a secondary air inlet; the combustion chamber is a pot bowl type structure taking a fluidized plate as the pot floor and the cloth wind plate as the pot wall; the fluidized plate is an annular flat plate, air ports are evenly distributed on the fluidized plate, and the center hole of the fluidized plated is communicated with the feeding device; a primary air port and a secondary air port are formed on the cloth wind plate, and are respectively surrounded by the primary air box and the secondary air duct. The combustion boiler has the advantages of more scientific feeding and environmental friendliness, greatly reduces workers' labor intensity, and improves working environment.

Description

Biomass gasification fired boiler

Technical field

The utility model relates to a kind of boiler, relates in particular to a kind of biomass gasification fired boiler.

Background technology

Living beings are meant the various organisms that form by photosynthesis, comprise all animals and plants and microorganism.And so-called biomass energy (biomass energy), being exactly solar energy is stored in form of energy in the living beings with the chemical energy form, promptly is the energy of carrier with living beings.It derives from the photosynthesis of green plants directly or indirectly, can be converted into conventional solid-state, liquid state and fuel gas, and is inexhaustible, nexhaustible, is a kind of regenerative resource, also is unique a kind of reproducible carbon source simultaneously.

Biomass energy has some other energy institute incomparable advantage, comprising:

1) recyclability

2) low contaminative

Sulfur content, the nitrogen content of living beings is low, generate in the combustion process SOX, NOX are less; When living beings act as a fuel,, can alleviate greenhouse effects effectively when growth because the carbon dioxide that it needs is equivalent to the amount of the carbon dioxide of its discharging, thereby is similar to zero to the clean discharge capacity of the carbon dioxide of atmosphere;

3) extensive distributivity

4) the biomass fuel total amount is very abundant.

Biomass energy is a world's fourth largest energy, is only second to coal, oil and natural gas.Along with the development of agriculture and forestry, the particularly popularization of charcoal firewood woods, biomass resource also will get more and more.

Therefore, the biomass energy Study on Technology has become one of great heat subject in the world with exploitation at present, receives countries in the world government and scientist's concern.

Simultaneously, fluidized-bed combustion boiler is efficient, a low clean burning technology of polluting that grows up the nearly more than ten years.Because of advantages such as it have that efficiency of combustion height, coal adaptability are wide, noxious gas emission concentration is low in the flue gas, load regulation range big, lime-ash can fully utilize; under current increasingly serious energy scarcity and environmental protection requirement; obtained development rapidly at home and abroad; and commercialization, to large scale development.

(solids change the process of similar fluid state into to its unique combustion mechanism through contacting with gas or liquid, be called fluid mapper process.Fluid mapper process is used for fuel combustion, is fluidized bed combustion, and its stove is called fluidized-bed combustion boiler.Fluidizing theory is used for burning and starts from the twenties in last century, is mainly used in petrochemical industry and metallurgical industry after the forties) make fluidized-bed combustion boiler have the not available significant advantage of plain cylindrical furnace, comprising: boiler thermal output is higher; Stable, simple to operate; Fuel tolerance is wide, and market fluctuation has stronger adaptability to coal supply; Pollutant discharge amount is low; The combustion intensity height, furnace cross-sectional area is little etc.

Problems such as prior biological matter fuel boiler owing to adopt the combustion system of conventional boiler, unavoidably exists poor combustion stability, and boiler thermal output is low, and smoke dust discharge concentration is big.

The utility model content

In view of the existing in prior technology deficiency, the utility model is intended to biomass fuel is combined with the principle of fluidized-bed combustion boiler, discloses a kind of biomass gasification fired boiler that is applicable to biomass fuel combustion.

Technical solution of the present utility model is achieved in that

A kind of biomass gasification fired boiler comprises body of heater, air-supply arrangement, airduct, feed arrangement and biomass combustion device, it is characterized in that:

Described airduct comprises: airduct and secondary air channel;

Described biomass combustion device comprises:

Bellows are positioned at the bottom of described burner, and its center is connected with feed arrangement, and link to each other with an airduct by a wind inlet in lower sidewall;

Secondary air duct is the ring-like air channel that is positioned at described burner top, is connected with secondary air channel is tangent by secondary wind inlet;

The combustion chamber, be basin with the fluidisation plate at the bottom of, be the basin alms bowl type structure that basin encloses with the air distribution plate;

Described fluidisation plate is a ring plate, equal wind distributing hole on it, and the centre bore of fluidisation plate communicates with feed arrangement;

Air distribution plate offers primary air nozzle and overfiren air port on it, be respectively bellows and secondary air duct and center on; Wherein, overfiren air port is positioned at air distribution plate top, tilt in the same way, the incline direction of every overfiren air port is along secondary wind air intake direction to tilt to side-lower, primary air nozzle comprises the straight air port that is positioned at the air distribution plate bottom and is positioned at the skew wind mouth that tilts in the same way at air distribution plate middle part, the projection of described straight air port on the plane of the axis of crossing described combustion chamber is parallel with the axis, the shape of described skew wind mouth and overfiren air port and distribute consistent.

Wind hole aperture 3-5mm on the described fluidisation plate, the adjacent holes distance is 8-15mm;

The bore size in described straight air port is 15-40mm ², adjacent air port is apart from 1.5-4cm;

The bore size of described skew wind mouth and overfiren air port is 30-70mm ², adjacent air port is apart from 1.5-4cm, and the angle of inclination is 40-55 °.

Described feed arrangement is embedded in underground, comprises feed hopper, feeding screw and resistance cigarette return duct;

Described feed hopper upper port is basseted, and lower port is communicated with feeding screw;

Described feeding screw one end is connected with the output of motor reducer, and the other end passes bellows and is connected with described fluidisation plate;

Described resistance cigarette return duct head end connects air-supply arrangement, and end is connected to described feeding screw and between the center of described feed hopper lower port and described bellows.

Compared with prior art, biomass gasification fired boiler described in the utility model is with biomass fuel, adopt the principle of fluidized bed combustion, needn't add any chemical combustion adjuvant,, produce fuel gas such as a large amount of carbon monoxide, propane, methane by the heat energy reaction, by preheating, destructive distillation biomass fuel is converted into the high-quality fuel gas, and the design by wind, secondary wind and an air port, with the abundant mixed intensified burning of air, accomplish smokeless, dustless, nuisanceless gas discharging fully.In addition, the design of underneath type spiral feed system, the further perfect global design of boiler, feeding is science more, and environmental friendliness greatly reduces working strength of workers, has improved work situation.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the enlarged drawing of the vertical view of the fluidisation plate among Fig. 1.

The specific embodiment

A kind of biomass gasification fired boiler, boiler output are 300kg/h, and as shown in Figure 1, it comprises body of heater, air blast, airduct, feed arrangement and biomass combustion device, it is characterized in that:

Described airduct comprises: airduct 1 and secondary air channel 7, and butterfly valve 3 and butterfly valve 6 are installed respectively; Air blast 4 connects airduct 1 and secondary air channel 7 respectively by threeway 3;

Described biomass combustion device comprises:

Bellows 16 are positioned at the bottom of described burner, and its center is connected with feed arrangement, and link to each other with an airduct 7 by a wind inlet in lower sidewall;

Secondary air duct 13 is the ring-like air channels that are positioned at described burner top, by secondary wind inlet and 1 tangent connection of secondary air channel;

The combustion chamber, be basin with fluidisation plate 15 at the bottom of, be the basin alms bowl type structure that basin encloses with air distribution plate 14;

Described fluidisation plate 15 is a ring plate, equal wind distributing hole 151 on it, and wind hole aperture 4-4.2mm, the adjacent holes distance is 10mm; The centre bore 152 of fluidisation plate communicates with feed arrangement;

Air distribution plate 14 offers

primary air nozzle

141a, 141b and overfiren air port 142 on it, be respectively bellows 16 and secondary air duct 13 and center on; Wherein, overfiren air port 142 is positioned at air distribution plate 14 tops, tilts in the same way, and the incline direction of every overfiren air port 142 is along secondary wind air intake direction to tilt to side-lower, and the angle of inclination is 45-50 °, and the air port is of a size of 40 * (1-1.5) mm ², adjacent air port is apart from 2-2.5cm; Primary air nozzle comprises the straight air port 141a that is positioned at air distribution plate 14 bottoms and is positioned at the skew wind mouth 141b that tilts in the same way at air distribution plate 14 middle parts, the projection of described straight air port 141a on the plane of the axis of crossing described combustion chamber is parallel with the axis, and the air port is of a size of 20 * (1-1.5) mm ², adjacent air port is apart from 2-2.5cm; The shape of described skew wind mouth 141b and overfiren air port 142 and distribute consistently, the angle of inclination is 45-50 °, the air port is of a size of 40 * (1-1.5) mm ², adjacent air port is apart from 2-2.5cm.

Described feed arrangement is embedded in underground, comprises feed hopper 12, feeding screw 9 and resistance cigarette return duct 8;

Described feed hopper 12 upper port are basseted, and lower port is communicated with feeding screw 9;

Described feeding screw 9 one ends are connected with the output of motor 10 reductors 11, and the other end passes bellows 16 and is connected with described fluidisation plate 15;

Described resistance cigarette return duct 8 head ends connect the port of export of air blast 4, and mounting ball valve 5, and end is connected to described feeding screw 9 and between the center of described feed hopper 12 lower port and described bellows 16.

Described biomass gasification fired boiler has solved gasification, and combustion stability, and technical problem such as overheavy firing, has reached the colourless effect of discharging fume, and through relevant department's test, every index all reaches designing requirement, and its leading indicator is as follows:

Boiler output: 300kg/h;

Boiler thermal output: 81%;

Excess air coefficient: 1.7;

Exhaust gas temperature: 230 ℃;

Smoke dust discharge concentration:＜80mg/m ³

Blackness of exhaustion (Lin Geman):＜I level;

SO ₂Concentration of emission:＜80mg/m ³

This boiler can be realized speed governing and autofeed by the motor 10 of control feeding screw 9.

The above; it only is the preferable specific embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection domain of the present utility model.

Claims

1. a biomass gasification fired boiler comprises body of heater, air-supply arrangement, airduct, feed arrangement and biomass combustion device, it is characterized in that:

Described airduct comprises: airduct and secondary air channel;

Described biomass combustion device comprises:

2. biomass gasification fired boiler according to claim 1 is characterized in that:

3. biomass gasification fired boiler according to claim 1 and 2 is characterized in that: