CN201462842U

CN201462842U - combustor

Info

Publication number: CN201462842U
Application number: CN2009200908001U
Authority: CN
Inventors: 邢乃成
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-15
Filing date: 2009-06-15
Publication date: 2010-05-12
Anticipated expiration: 2019-06-15

Abstract

The utility model relates to a combustor using gas fuel and solves the disadvantages that the known combustor using gas fuel has insufficient mixing of air and gas, low combustion speed, low temperature, low firepower, low thermal efficiency, poor adaptability and is easy to have floating flame and backfire. The technical field includes that: a plurality of fire holes are arranged on a fire distribution plate, a funnel-shaped fire distribution chamber is arranged under the fire distribution plate, an inverted funnel-shaped premixing chamber is arranged under the fire distribution chamber, an air inlet is arranged at the bottom of the premixing chamber, a plurality of gas distribution holes are arranged around the air inlet, a gas distribution chamber is arranged outside the gas distribution holes, and a gas inlet is arranged on the gas distribution chamber. The combustor is applicable to various cooking stoves.

Description

Burner

Technical field

The utility model relates to a kind of burner, particularly a kind of burner of using gases fuel.

Background technology

Advantages such as gaseous fuels such as natural gas, liquefied gas, biogas have combustion process is not had smoke contamination, and discharge of noxious gases is few.The burner of present known using gases fuel adopts mode of jet mostly, jet-flow mixes the back and burns from a plurality of fire hole ejections on the fire dish with air, this burner ubiquity air and combustion gas mixing are insufficient, burning velocity is slow, temperature is low, the problem that firepower is less than normal for a lot of use occasions, usually can't be used because firepower is not enough.The lower flame temperature heat that generates that is unfavorable for burning is delivered to heating object, and the thermal efficiency is difficult to improve.The air of this burner is supplied with and is depended on jet-flow, and therefore, the burner adaptive capacity is poor, and flow of external air or the fluctuation of gaseous fuel supply pressure all can influence flame holding and be easy to generate from flame or tempering, when serious even can stop working.

The utility model content

The technical problem that solves:

Insufficient for the burner air and the combustion gas mixing that solve known using gases fuel, burning velocity is slow, and temperature is low, firepower is less than normal, the thermal efficiency is low, and adaptive capacity is poor, and the problem the utility model that is easy to generate from flame or tempering provides a kind of burner, this burner can fully mix air and combustion gas fast, make the conflagration of combustion gas energy, improve flame temperature, firepower is big, the thermal efficiency is high, adaptive capacity is strong, is difficult for producing from flame or tempering.

Technical scheme:

Minute fire dish is provided with a plurality of fire holes, under minute fire dish infundibulate is set and divides fiery chamber, and the premixer of falling the infundibulate is set under minute fiery chamber, in the bottom, premixer air intlet is set, around air intlet, a plurality of air distribution holes are set, gas distributing chamber is set outside air distribution hole, fuel gas inlet is set in the gas distributing chamber.The sectional area that divides fiery chamber and junction, premixer is less than 1/4th of minute fire dish sectional area.The sectional area that divides fiery chamber and junction, premixer is less than 1/2nd of air intlet sectional area.The sectional area of single air distribution hole is less than 1/50th of the air intlet sectional area.

When using this burner, forced air supply devices such as air blast or fan are set at the air intlet place, and gaseous fuel enters the premixer through air distribution hole then from enter gas distributing chamber from fuel gas inlet, with enter the fiery chamber of branch after air that air intlet enters mixes, the fire hole ejection burning from minute fire dish at last.

Beneficial effect:

Because single air distribution hole sectional area is less, the air-flow that forms when combustion gas enters the premixer is very thin, under the effect of air draught, can disperse rapidly, a plurality of air distribution holes can make combustion gas mix rapidly with air. because fiery chamber of branch and junction, premixer sectional area ratio air intlet place are little, air velocity was accelerated gradually when mixed airflow flowed in the premixer, improved mixing velocity, the air-flow center also can fully be mixed. after mixed airflow enters the fiery chamber of branch, because sectional area increases gradually, air velocity slows down, can be at the inner turbulent flow that forms of air-flow, further promote combustion gas and Air mixing. last, spray from the fire hole on the fire dish through full and uniform mixed combustion mixture, and above the fire dish, burn. than prior art, this burner makes gaseous fuel and Air mixing more full and uniform. owing to adopt the forced air supply device, this burner intake is not subjected to the surrounding air airflow influence, be not subjected to yet, and can accurately be regulated flexibly, being easy to the ratio of air fuel is adjusted to optimum state. prior art adopts mode of jet, be vulnerable to the mobile or gaseous fuel supply pressure fluctuation of surrounding air, and be difficult for regulating, the air fuel ratio is difficult to reach optimum state. because combustion mixture mixes fully, ratio is suitable, so this combustor flame temperature height, firepower is big, thermal efficiency height; Because intake is not subjected to airflow influence on every side, so this burner adaptive capacity is strong, be difficult for producing from flame or tempering.

Use this burner, air and combustion gas can fully mix fast, the flame temperature height, and firepower is big, thermal efficiency height, and adaptive capacity is strong, is difficult for producing from flame or tempering

Description of drawings

Fig. 1 is the front view of burner;

Fig. 2 is the vertical view of burner shown in Figure 1;

Fig. 3 is the cutaway view along A-A line among Fig. 2;

Fig. 4 is the cutaway view along B-B line among Fig. 3.

The specific embodiment

As shown in Figures 1 to 4, make a branch fire dish 1, minute fire dish 1 is provided with a plurality of

fire holes

2,1 time infundibulate is set at a minute fire dish and divides

fiery chamber

3,3 times setting premixers of falling the infundibulate 4 in minute fiery chamber, 4 bottoms are provided with air intlet 5 in the premixer, and a plurality of air distribution holes 6 are set around air intlet 5, gas distributing chamber 7 is set outside air distribution hole 6, fuel gas inlet 8 is set in the gas distributing chamber 7.Dividing the fiery chamber 3 and the sectional area of 4 junctions, premixer is 1/10th of branch fire dish 1 sectional areas.Dividing the fiery chamber 3 and the sectional area of 4 junctions, premixer is 1/4th of air intlet 5 sectional areas.The sectional area of single air distribution hole 6 is one of percentages of air intlet 5 sectional areas.

Claims

1. burner, minute fire dish is provided with a plurality of fire holes, it is characterized in that: under minute fire dish, infundibulate is set and divides fiery chamber, the premixer of falling the infundibulate is set under minute fiery chamber, in the bottom, premixer air intlet is set, around air intlet, a plurality of air distribution holes are set, gas distributing chamber is set outside air distribution hole, fuel gas inlet is set in the gas distributing chamber.

2. burner according to claim 1 is characterized in that: the sectional area that divides fiery chamber and junction, premixer is less than 1/4th of minute fire dish sectional area.

3. burner according to claim 1 is characterized in that: the sectional area that divides fiery chamber and junction, premixer is less than 1/2nd of air intlet sectional area.

4. burner according to claim 1 is characterized in that: the sectional area of single air distribution hole is less than 1/50th of the air intlet sectional area.