CN200955737Y

CN200955737Y - Gas burner

Info

Publication number: CN200955737Y
Application number: CN 200620120910
Authority: CN
Inventors: 李冬梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-08
Filing date: 2006-09-08
Publication date: 2007-10-03
Anticipated expiration: 2016-09-08

Abstract

The utility model discloses a gas burner comprising a burner, a combustion chamber, an air box. The burner is equipped with a fuel gas channel and an acid gas channel communicated by casing. The combustion chamber is a cavity comprises an inlet and an outlet. The tail of the burner is close to the inlet of the combustion chamber while the air box with vantage is covering the combustion chamber. The short tube controlled by linkage is arranged at the tail of the burner, the head of the burner stenches on the other side of the linkage. The swirling flow device, which comprises a plurality of blades along the radial of the short tube, is fixed on the short tube. Therefore based on practical operating condition and requirement for loading adjustment, not only relative displacement between blade and burner inlet is capable of altering but also swirling flow and circulating flow strength as well as flame shape and burning strength can be adjusted.

Description

A kind of gas burner

Technical field

The utility model relates to a kind of gas burner, comprises burner, combustion chamber, air bellow.

Background technology

In the burning process process, reasonably organizational controls gas combustion process and reduction pollutant emission are the key technology assurances of whole device successful operation.The applicant once developed a kind of gas burner of the built-in rotational flow distributor of along the circumferential direction arranging, can the time of staying of prolong smoke in the combustion chamber, strengthen the mixing and burning effect, and rely on the high temperature gases recirculating pre-heating fuel, the retention flame.But the shortcoming of this gas burner is: after calculating definite best eddy flow and backflow ratio, the internal structure of this gas burner can not change with load with regard to unique definite eddy flow coefficient again.

Summary of the invention

For overcoming the defective of prior art, the technical problems to be solved in the utility model has provided a kind of gas burner of regulating eddy flow and circulating flow strength.

The technical solution of the utility model is: this gas burner comprises burner, combustion chamber, air bellow, burner is provided with fuel gas passage and the sour gas passage that bushing type connects, the combustion chamber is the cavity that includes an inlet and an outlet, the afterbody of burner is near the inlet of combustion chamber, the air bellow that is provided with air intake opening is enclosed within the outside, combustion chamber, wherein the afterbody at burner is provided with the short tube of being controlled by linkage, the other end of linkage stretches out the head of burner, swirl-flow devices is installed on the short tube, and it is made up of a plurality of blades that radially are provided with along short tube.

Because having adopted, this gas burner can axially come and go the swirl-flow devices that moves along the short tube of burner, thereby can be according to the requirement of actual operating mode and Load Regulation, change the relative displacement of blade and entry of combustion chamber by the linkage on the pulling swirl-flow devices, regulate eddy flow and circulating flow strength, flame profile and combustion intensity that control needs.

Description of drawings

Fig. 1 is the cutaway view of gas burner of the present utility model;

Fig. 2 is the axle side structure figure of the swirl-flow devices on the short tube.

The specific embodiment

With reference to the accompanying drawings, will be described in detail the specific embodiment of the present utility model.

Fig. 1 is the cutaway view of gas burner of the present utility model.Burner of the present utility model comprises burner 1, combustion chamber 6, air bellow 5, burner 1 is provided with fuel gas passage and the sour gas passage that bushing type connects, combustion chamber 6 is the cavitys that include an inlet and an outlet, the afterbody of burner 1 is near the inlet of combustion chamber 6, the air bellow 5 that is provided with air intake opening is enclosed within 6 outsides, combustion chamber, wherein the afterbody at burner 1 is provided with the short tube of being controlled by linkage, the other end of linkage stretches out the head of burner, swirl-flow devices 3 is installed on the short tube, and it is made up of a plurality of blades that radially are provided with along short tube.Preferably, the outside of the inlet 9 of described combustion chamber 6 is the splayed to the outlet convergent, and the inboard of inlet 9 is the splayed to the outside convergent of inlet.Match with the shape of this entry of combustion chamber, as shown in Figure 2, each blade of described swirl-flow devices 3 is the pentagon that three right angles are arranged, and the on-right angle limit is near the inlet 9 of combustion chamber.

In addition, be provided with the distributor 4 of ring-type in the periphery of described swirl-flow devices 3.The afterbody of burner 1 is provided with flame holder 2, and it is by being welded with the tangent many groups blade of circumference direction radially.Described air bellow 5 is connected by flange 10 with burner 1.Also be provided with igniter 7, the one end stretches into combustion chamber 6.Also be provided with flame detector 8, the one end stretches into combustion chamber 6.Burner 1 can be realized conversion combinations such as oil gas or gas gas single fire, multifuel combustion, thereby satisfies different fuel supply needs.Distributor 4 is welded by cavernous sieve plate circle system, thereby guarantees that combustion air along the circumferential direction is evenly distributed before entering swirl-flow devices, thereby guarantees that further the flame that produces in the combustion chamber 6 is placed in the middle, avoids flame to lick furnace wall.The front portion of bellows 5 is furnished with bolted flange-interface, thereby has the dual-use function of air feed and access hole.Swirl-flow devices 3 is by forming with the circumferential Series Blade that axially folds certain angle, with the short tube welding of the outer tube relative motion of burner and integrated, last and linkage is formed by connecting, and can move axially relatively.The aft mounted flame holder 2 of burner can effectively strengthen turbulence effect and the indoor flame of smooth combustion.The fluid of swirl vane of flowing through develops into the turbulent flow with certain swirl strength, effectively prolong and have the high momentum air of eddy flow feature and the incorporation time of fuel in the combustion chamber of low amount of power, strengthen the mixing diffusion of burner and burn effect and also decompose poisonous and harmful substance to greatest extent and be converted into harmless gas, produce the higher and even temperature field of temperature, improve the chemical combustion reaction efficiency.

Swirl strength and flame profile depend on that the relative distance of axial swirl-flow devices 3 and hybrid combustor 6 inlet throats, the geometry size of blade, the axis projection of adjacent blades overlap zone length and minimum interval size thereof.By the position of linkage regulating shaft to swirl-flow devices, when swirl-flow devices all embedded hybrid combustor 6 inlet throats, eddy flow and backflow effect were the strongest, form bold weak point and strong flame; Otherwise, extract swirl-flow devices out from throat, increase both relative distance, will prolong flame profile, alleviate eddy flow and backflow effect, be in the state of middle intensity burning this moment, thereby reach the purpose of regulating combustion intensity and effectively controlling flame.

The contrast accompanying drawing further describes technical scheme below: the main fuel B (can be by-product acid gas) that the material that enters this burner comprises the auxiliary fuel A (fuel gas or fuel oil) that enters from assembled casing formula burner center sleeve, import from the internal and external casing interlayer, the assurance that enters from the bellows inlet needed combustion air that burns.The air distributor of flowing through evenly distributes and enters axial swirl-flow devices, air by the higher axially and radially kinetic energy of having behind the swirl-flow devices is by entering the combustion chamber through throat's spout, have the auxiliary fuel of low kinetic energy or main fuel with cyclone mode after the ejection of burner afterbody flame holder, combustion air with higher kinetic energy impacts and entrainments, produce and mix fully and diffusion effect, the mixture of air and fuel is lighted and acutely burning, the flue gas that forms expands rapidly and continues to spread downstream from the combustion chamber with cyclone mode with higher kinetic energy, produce lower negative pressuren zone simultaneously in the central area, combustion chamber, cause backflow effeet, the high-temperature flue gas of backflow is the fuel and the combustion air mixture that spray into of preheating once more; Produce strong local turbulent flow simultaneously and continue to be diffused in the mixture of swirling motion, further interact, strengthen and mix diffusion effect; The temperature field of combustor exit is tending towards evenly, and formation is stablized bold short flame and helped safety, stable, economical operation; Whole violent combustion reaction is the chemical reaction of finishing in comprehensive function following moment of strong turbulent flow and strength rotational flow and backflow.

According to the requirement of actual operating mode and Load Regulation, by changing the relative displacement of blade and throat's spout on the company's pole on the pulling swirl-flow devices, regulate eddy flow and circulating flow strength, the flame profile that control needs, thereby control combustion intensity.The corresponding techniques parameter can be read by the rule on the connecting rod.

Burner Load Regulation of the present utility model enlarges markedly, eddy flow coefficient and flame profile are regulated arbitrarily, operation elasticity is big, and fuel tolerance is strong, and fire behaviour is good, steady flame ability is strong, flame is easy to control, and pollutant effulent is low, and is safe and reliable to operation, for ease of maintenaince, be specially adapted to the burners such as various boilers, reacting furnace, pyrolysis furnace and incinerator in fields such as electric power, petrochemical industry, natural gas processing and Coal Chemical Industry, environmental project.

Claims

1, a kind of gas burner, comprise burner (1), combustion chamber (6), air bellow (5), burner (1) is provided with fuel gas passage and the sour gas passage that bushing type connects, combustion chamber (6) is the cavity that includes an inlet and an outlet, the afterbody of burner (1) is near the inlet of combustion chamber (6), the air bellow (5) that is provided with air intake opening is enclosed within outside, combustion chamber (6), it is characterized in that: the afterbody at burner (1) is provided with the short tube of being controlled by linkage, the other end of linkage stretches out the head of burner, swirl-flow devices (3) is installed on the short tube, and it is made up of a plurality of blades that radially are provided with along short tube.

2, according to the described gas burner of claim 1, it is characterized in that: the outside of the inlet (9) of described combustion chamber (6) is the splayed to the outlet convergent, and the inboard of inlet (9) is the splayed to the outside convergent of inlet.

3, according to claim 1 or 2 described gas burners, it is characterized in that: described blade is the pentagon that three right angles are arranged, and the on-right angle limit is near the inlet (9) of combustion chamber.

4, according to the described gas burner of claim 3, it is characterized in that: the distributor (4) that is provided with ring-type in the periphery of described swirl-flow devices (3).

5, according to the described gas burner of claim 1, it is characterized in that: the afterbody of burner (1) is provided with flame holder (2), and it is by being welded with the tangent many groups blade of circumference direction radially.

6, according to the described gas burner of claim 1, it is characterized in that: described air bellow (5) is connected by flange (10) with burner (1).

7, according to the described gas burner of claim 1, it is characterized in that: also be provided with igniter (7), the one end stretches into combustion chamber (6).

8, according to the described gas burner of claim 1, it is characterized in that: also be provided with flame detector (8), the one end stretches into combustion chamber (6).