CN208846407U

CN208846407U - A kind of powdered biomass controlled turbulent lean premixed combustor

Info

Publication number: CN208846407U
Application number: CN201821490489.5U
Authority: CN
Inventors: 段景峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-09-12
Filing date: 2018-09-12
Publication date: 2019-05-10
Anticipated expiration: 2028-09-12

Abstract

The utility model proposes a kind of powdered biomass controlled turbulent lean premixed combustors, the combustion chamber is integrally formed by top plate and cylinder side wall, the center of top plate is equipped with jet port, combustion chamber is equipped with flame on duty room, flame on duty room includes cylindrical sidewall, bluff body, flame spray-hole and vent, the lower part of cylindrical sidewall is provided with flame spray-hole, and the flame on duty room opening opposite with jet port is correspondingly arranged on bluff body, is equipped with vent on cylindrical sidewall.It solves powdered biomass fuel-device flame in the prior art and unordered uncontrollable state is presented, ashes burn in dead angle acumulation, supporting machinery is needed to clear up ashes, need to be equipped with the problem of high-power air-introduced machine carries out wind direction traction simultaneously, a kind of powdered biomass controlled turbulent lean premixed combustor is provided, be conducive to fuel combustion completely and avoids the effect of mechanical ashing in boiler and removal air-introduced machine.

Description

A kind of powdered biomass controlled turbulent lean premixed combustor

Technical field

The utility model relates to a kind of powdered biomass controlled turbulent lean premixed combustors, belong to powdered biomass fuel boiler Technical field.

Background technique

Traditional powdered biomass burning directly sprays combusting boiler using directly spray combusting boiler or coal dust, and combustion chamber uses six faces Body structure, since the shape of combustion space limits, unordered uncontrollable state is presented in flame, and flame oriented and ordered can not control； Above, the combustion chamber many places Nei You dead angle causes ash content to accumulate in dead space, needs building machine for flame and exhanst gas outlet design Tool clears up ashes device；Due to the unordered uncontrollable burning position of Premixed Turbulent Combustion flame status in combustion chamber, Secondary Air without Method finds suitable feeding position, is partially carried and escapes by flue gas without the complete fuel that burns, powdered biomass is caused to be burnt Not exclusively, while needing to be equipped with high-power air-introduced machine progress wind direction traction, and air-introduced machine is easy to happen failure and a large amount of electricity of consumption Energy.

Utility model content

The utility model aim is to solve powdered biomass fuel-device in the prior art due to the shape of combustion space Unordered uncontrollable state is presented in shape limitation, flame, and flame oriented and ordered can not control, the ashes that cause to burn in dead angle acumulation, It needs supporting machinery to clear up ashes, while needing to be equipped with the problem of high-power air-introduced machine carries out wind direction traction, a kind of biology is provided Matter powder controlled turbulent lean premixed combustor and its application method, the mixture point for being formed powdered biomass and air using bluff body Two parts are dissipated into, be conducive to fuel combustion completely and avoid the effect of mechanical ashing in boiler and removal air-introduced machine.

The utility model is for this purpose, using following technical scheme:

Powdered biomass fuel controlled turbulent lean premixed combustor described in the utility model includes jet port, flame on duty room The combustion chamber and；The combustion chamber is integrally formed by top plate and cylinder side wall, and the center of the top plate is equipped with jet port, described Combustion chamber is equipped with flame on duty room, and the flame chamber on duty includes cylindrical sidewall, bluff body, flame spray-hole and ignites Hole, the lower part of the cylindrical sidewall are provided with flame spray-hole, and the flame chamber on duty is corresponding with the opposite opening of jet port It is provided with bluff body, vent is installed on the cylindrical sidewall.

Preferably, the bluff body is centrum shape.

Preferably, the bluff body is semi-spherical shape, and the face opposite with jet port is semi-spherical shape.

The working principle of powdered biomass fuel controlled turbulent lean premixed combustor described in the utility model are as follows:

By the powdered biomass and air mixture of jet port injection, after bluff body shunts and slows down, a part enters value Flame chamber, class, in flame on duty room, the vent of setting is formed in bluff body and flame on duty room by the effect of pyrophoric flame Recirculating zone burn and heat flame chamber on duty to 1000 DEG C or more, guarantee the sustained combustion of flame on duty, another part is raw Material powder and air mixture move after scattering with injection direction in the same direction, draw by the flame that flame on duty room is formed Combustion, continuing to burn in the combustion chamber is formed simultaneously Premixed Turbulent Flames.

Powdered biomass fuel controlled turbulent lean premixed combustor described in the utility model has the beneficial effect that

(1), practical present of Premixed Turbulent Flames burning occurred in the flame on duty room and combustion chamber of the utility model is held Continuous deflagration state, therefore the ashes that burn can not be detained in above-mentioned space, be increased without mechanical ashing device.

(2), the utility model has the orientation of Flame of Natural Gas since the Premixed Turbulent Flames ejected are vectored injections Motion characteristics are conducive to remove mechanical ashing device in air-introduced machine and boiler.

(3), the utility model can be directly connected to chimney due to controlled turbulent premixed flame direction of motion end, utilize flue gas The lift that own temperature generates reaches to atmosphere automatic-discharging flue gas, removes air-introduced machine.

(4), the controlled turbulent premixed flame that the utility model is formed is directed movement, overcomes the unordered shape of original flame State, combustion process are controllable.

(5), the controlled turbulent premixed flame that the utility model is formed is that fuel global orientation moves the kinetic energy provided, makes ash Cinder directed movement, overcomes ash buildup.

(6), the mixture of powdered biomass and air used in the utility model is in advance by powdered biomass and air Proportion adjustment is to best combustion ratio, and due to the characteristic of Premixed Turbulent Flames itself, flame intensity is high, overcomes incomplete combustion Inducement.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of powdered biomass Premixed Turbulent Combustion described in the utility model room；

The indoor arrow that wherein burns indicates the flow direction of powdered biomass and air mixture；

In figure: 1- jet port；2- bluff body；3- flame on duty room；4- flame spray-hole；5- vent；The combustion chamber 6-；7- Recirculating zone；8- powdered biomass controlled turbulent premixed flame.

Specific embodiment

The technical solution of the utility model is further illustrated below with reference to the accompanying drawings and specific embodiments.

Specific embodiment one illustrates that present embodiment, powdered biomass turbulent flow described in present embodiment are pre- referring to Fig. 1 Mixed combustion chamber includes jet port 1, flame on duty room 3 and combustion chamber 6；The combustion chamber 6 by top plate and cylinder side wall one at Type, the center of the top plate are equipped with jet port 1, flame on duty room 3, the flame on duty are equipped with inside the combustion chamber 6 Room 3 includes cylindrical sidewall, bluff body 2, flame spray-hole 4 and vent 5, and the lower part of the cylindrical sidewall is provided with flame spray-hole 4, the flame chamber 3 on duty opening opposite with jet port 1 is correspondingly arranged on bluff body 2, is equipped with and draws on the cylindrical sidewall Fire hole 5.

The bluff body 2 is centrum shape or the bluff body 2 is semi-spherical shape, and the face opposite with jet port 1 is half Spherical shape.

Dispersion and inhibition of the mixture of air and powdered biomass fuel by the bluff body 2 in flame on duty room 3, Recirculating zone 7 is generated, is conducive to ignite to generate Premixed Turbulent Flames.

The flame chamber on duty 3 can be cylindric or other different tubulars as a result, its underpart must have several holes knot Structure destructing guarantees that the flame in flame chamber 3 on duty is ejected into combustion chamber 6.

The application method of powdered biomass Premixed Turbulent Combustion described in the utility model room, comprises the following steps:

Step 1: first air and powdered biomass fuel are mixed into resulting mixture in advance, and burning is spurted by jet port 1 Room 6；

Step 2: under the dispersion of bluff body 2 and inhibition, a part of mixture enters flame on duty room 3, vent 5 It ejects pyrophoric flame to light mixture, temperature quickly rises to 1300 DEG C in flame on duty room 3, and heats fire on duty simultaneously The cylindrical sidewall of flame room 3 keeps its red-hot, and the flame in flame on duty room 3 injects combustion chamber by flame spray-hole 4 and gas outlet 6, and the another part mixture Jing Guo 2 scattering process of bluff body is lighted in combustion chamber 6, keep temperature in combustion chamber 6 rapid 1300 DEG C are increased to, and heats the cylinder side wall of combustion chamber 6, keeps its red-hot；

Step 3: vent 5 stops injection pyrophoric flame, and jet port 1 continues to eject mixture, and mixture is in fire on duty It ignites in the broiling conditions of flame room 3 and combustion chamber 6 and sustained combustion, forms controlled turbulent premixed flame 8.

Since practical present of Premixed Turbulent Flames burning occurred in flame on duty room 3 and combustion chamber 6 continues deflagration state, Therefore burning ashes can not be detained in above-mentioned space, be increased without mechanical ashing device.

Although the utility model is disclosed with specific data and embodiment, it is not intended to limit the utility model, Any person skilled in the art can make parameter modification appropriate, therefore in the essential scope for not departing from the utility model The protection scope of the utility model should subject to the definition of the claims.

Claims

1. a kind of powdered biomass controlled turbulent lean premixed combustor, which is characterized in that including jet port (1), flame on duty room (3) With combustion chamber (6)；The combustion chamber (6) is integrally formed by top plate and cylinder side wall, and the center of the top plate is equipped with injection Mouth (1), the combustion chamber (6) is internal to be equipped with flame on duty room (3), and the flame chamber (3) on duty includes cylindrical sidewall, bluff body (2), flame spray-hole (4) and vent (5), the lower part of the cylindrical sidewall are provided with flame spray-hole (4), the fire on duty Flame room (3) and jet port (1) opposite opening are correspondingly arranged on bluff body (2), are equipped with vent on the cylindrical sidewall (5)。

2. a kind of powdered biomass controlled turbulent lean premixed combustor according to claim 1, which is characterized in that the bluff body It (2) is centrum shape.

3. a kind of powdered biomass controlled turbulent lean premixed combustor according to claim 1, which is characterized in that the bluff body It (2) is semi-spherical shape, and the face opposite with jet port (1) is semi-spherical shape.