CN103267307A

CN103267307A - Ignition and combustion stabilizing device for industrial gas combustor

Info

Publication number: CN103267307A
Application number: CN2013101812651A
Authority: CN
Inventors: 肖江东; 徐志斌
Original assignee: SHANGHAI NUOTEFEIBO COMBUSTION EQUIPMENT CO Ltd
Current assignee: SHANGHAI NUOTEFEIBO COMBUSTION EQUIPMENT CO Ltd
Priority date: 2013-05-16
Filing date: 2013-05-16
Publication date: 2013-08-28
Anticipated expiration: 2033-05-16
Also published as: CN103267307B

Abstract

The invention relates to an ignition and combustion stabilizing device for an industrial gas combustor and belongs to the technical field of industrial gas combustors. The device aims at solving the technical problem that an ignition device of a high-power industrial gas combustor is instable and reducing NOx discharge. The ignition and combustion stabilizing device is characterized in that a central pipe comprises a central pipe inner pipe and a central pipe outer pipe. The central pipe inner pipe is arranged in the central pipe outer pipe, the central pipe inner pipe and the central pipe outer pipe are coaxially and symmetrically arranged, a gas inlet channel of a central annular gas injection device is arranged between the central pipe inner pipe and the central pipe outer piper, the upper end of the gas inlet channel is sealed by an annular gas channel cover, the inner peripheral side of the annular gas channel cover is fixedly connected with the upper end portion of the central pipe inner pipe, and a central annular gas nozzle inclined upwards from inside to outside is arranged at the connection position of the outer peripheral inclined end face of the annular gas channel cover and the inclined end face of the upper end portion of the central pipe outer pipe. The ignition and combustion stabilizing device has the advantages of improving the fuel rationing mode and being high in ignition success rate, stable in flame and low in NOx discharge quantity.

Description

A kind of industrial combustion gas burner ignition smooth combustion apparatus

Technical field

The present invention relates to a kind of industrial combustion gas burner igniting device and center smooth burning method thereof, this ignition device success rate height, flame stabilization, NOx discharge low, belong to the industrial combustion gas technical field of burner.

Background technology

At present, along with the extensive use of domestic combustion gas, the perfect of circuit of transferring natural gas from the west to the east, the coal of ground such as Beijing, Xinjiang, Tianjin heating changes the gas engineering and just deeply carries out.In addition, various casing-head gas, industrial waste gas also collect and are used as industrial combustion gas, so just to the demands for higher performance of burner.Gas burner is just towards high-power, the development of energy-conservation stabilising direction.

Known high power gas burner, perhaps the fuel gas with low heat value burner adopts the supply mode of center low speed combustion air, burning torch also is being positioned at the igniting of low speed combustion air zone, but most burners are when dispensing fuel, the center does not have fuel to be supplied with, and can only utilize burning torch directly to light peripheral fuel.The patent No. of Shanghai Nuote Feibo Combustion Equipment Co., Ltd is (ZL200710045046.5), name is called the patent of invention of＜a kind of method and device thereof of guaranteeing industrial burner stable burning 〉, set forth a kind of method in a small amount of combustion gas of burner center low speed combustion air zone dispensing, to strengthen igniting, smooth combustion.This method is simple in structure, and practicality improves greatly.But this technology has certain limitation for high-power burner and the burner that requires low NOx drainage in the application, often has the not enough defective of ignition flame stability.

Summary of the invention

Purpose of the present invention: defective and reduction NOx discharging in order further to improve high-power industrial combustion gas burner igniting device flame instability provide a kind of industrial combustion gas burner ignition smooth combustion apparatus.

For achieving the above object, the technical scheme that adopts is: a kind of industrial combustion gas burner ignition smooth combustion apparatus, comprise central tube, central tube, cyclone, burning torch and main gas gun, it is characterized in that: described central tube comprises pipe and central tube outer tube in the central tube, pipe places in the described central tube outer tube in the described central tube, and coaxial being symmetrical arranged, the combustion gas admission passage of ring-type fuel gas injection device centered by between the interior pipe of described central tube and the described central tube outer tube, the combustion gas admission passage upper end of described center ring-type fuel gas injection device is stifled by ring-type blast tube cap seal, the inner peripheral of described ring-type blast tube lid is fixedlyed connected with pipe upper end in the described central tube, the outer periphery angled end-face of described ring-type blast tube lid and the angled end-face adjoiner of described central tube outer tube upper end are equipped with the outward-dipping center ring-type gas nozzle that makes progress from the lining.

The axis of described center ring-type gas nozzle fuel gas injection direction and described central tube be angle [alpha] from the lining outward-dipping upwards, described α is 20 °～90 °.

The invention has the beneficial effects as follows: the dispensing mode of having improved fuel, low speed combustion air zone in central tube, by center ring-type fuel gas injection device dispensing and eject the combustion gas of a small amount of annular membrane shape, can cover whole low speed central area substantially, utilize burning torch to light this part annular membrane shape combustion gas earlier, with the full and uniform mixed combustion of low speed central tube air, the flue gas of generation can dilute the root oxygen amount of main flame, has reduced the generation of NOx.Thereby set up stable centers flame, by eddy flow wind flame of centre is taken to peripheral fuel region again, light peripheral fuel.Set up stable annular membranaceous flame in the central area of burner, and then stablized the main flame of high-power burner.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples:

Fig. 1 is structural representation of the present invention;

Fig. 2 is that the A-A of Fig. 1 is to structural representation;

Gas gun nozzle arrangements schematic diagram (amplification) centered by Fig. 3;

Fig. 4 be among Fig. 3 B to ring-type gas nozzle lid structural representation (Fig. 3 B to).

Among the figure, 1-main gas gun; 2-cyclone; 3-central tube; 4-air duct; 5-central tube air duct; 6-central tube air duct; The combustion gas admission passage of 7-center ring-type fuel gas injection device; 8-central tube; 9-center ring-type blast tube lid; 10-center ring-type gas nozzle; 11-burning torch; 12-nozzle angled end-face; The outer periphery angled end-face of 13-ring-type blast tube lid; Pipe in 14-central tube; 15-central tube outer tube.

The specific embodiment

Fig. 1 and Fig. 2 are structural representation of the present invention.As seen from the figure, a kind of industrial combustion gas burner of the present invention ignition smooth combustion apparatus, comprise central tube 8, central tube 3, cyclone 2, burning torch 11 and main gas gun 1, it is characterized in that: described central tube 8 comprises pipe 14 and central tube outer tube 15 in the central tube, pipe 14 places in the described central tube outer tube 15 in the described central tube, and coaxial setting, the combustion gas admission passage 7 of ring-type fuel gas injection device centered by between the interior pipe 14 of described central tube and the described central tube

outer tube

15,9 shutoff are covered by the ring-type blast tube in combustion gas admission passage 7 upper ends of described center ring-type fuel gas injection device, the inner peripheral of described ring-type blast tube lid 9 is fixedlyed connected with pipe 14 upper ends in the described central tube, by Fig. 3 and Fig. 4 as seen, nozzle angled end-face 12 adjoiners of described center ring-type blast tube lid angled end-face 13 and described central tube outer tube 15 upper ends are equipped with the outward-dipping center ring-type gas nozzle 10 that makes progress from the lining.

The axis of described center ring-type gas nozzle 10 fuel gas injection directions and described central tube be angle [alpha] from the lining outward-dipping upwards, described α is 20 °～90 °.

Be central tube air duct 6 in the central tube 8 of the present invention, be connected with low speed cooling air; Be central tube air duct 5 between central tube outer tube 15 and the central tube 3, air velocity herein is low; Be air duct 4 between central tube 3 lateral surfaces and the aditus laryngis wall, the invention is characterized in center ring-type fuel gas injection device, the fuel gas injection direction of center ring-type gas nozzle and the axis of described central tube be angle [alpha] from the lining outward-dipping upwards.During work; the burning torch 11 generation flammule that catches fire earlier; be central tube air duct 5 between central tube outer tube 15 and the central tube 3; air velocity herein is low; be easy to light and combustion-supporting above-mentioned by more intermediate annular fuel gas injection device dispensing and eject the combustion gas of a small amount of annular membrane shape; generation center ring-type flame, and protect it to be difficult for blowing out, thus set up stable centers flame.Under the eddy flow wind effect of cyclone 2, center ring-type flame zone is arrived the periphery again, light main gas gun 1 peripheral fuel.

Claims

1. industrial combustion gas burner ignition smooth combustion apparatus, comprise central tube, central tube, cyclone, burning torch and main gas gun, it is characterized in that: described central tube comprises pipe and central tube outer tube in the central tube, pipe places in the described central tube outer tube in the described central tube, and coaxial setting, the combustion gas admission passage of ring-type fuel gas injection device centered by between the interior pipe of described central tube and the described central tube outer tube, the combustion gas admission passage upper end of described center ring-type fuel gas injection device is stifled by ring-type blast tube cap seal, the inner peripheral of described ring-type blast tube lid is fixedlyed connected with pipe upper end in the described central tube, the outer periphery angled end-face of described ring-type blast tube lid and the angled end-face adjoiner of described central tube outer tube upper end are equipped with the outward-dipping center ring-type gas nozzle that makes progress from the lining.

2. as a kind of industrial combustion gas burner ignition smooth combustion apparatus as described in the claim l, it is characterized in that: the axis of described center ring-type gas nozzle fuel gas injection direction and described central tube be angle [alpha] from the lining outward-dipping upwards, described α is 20 °～90 °.