CN2506880Y

CN2506880Y - Natural gas tip for igniting

Info

Publication number: CN2506880Y
Application number: CN 01265918
Authority: CN
Inventors: 黄崇锡; 张相武; 杜炜东
Original assignee: SHAANXI YANGLING ASTRONAUTICS WATER SAVING SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: SHAANXI YANGLING ASTRONAUTICS WATER SAVING SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2001-11-28
Filing date: 2001-11-28
Publication date: 2002-08-21
Anticipated expiration: 2011-11-28

Abstract

The utility model relates to a natural gas startup burner used for a startup of temperature-raising in a reforming furnace. The utility model comprises two burning sections I and II whose radial cavities are communicated with each other, wherein, an inlet end of a first time burning section is communicated through a perforated board or a swirler with a mixed-air inputting device which is formed by a central ignition tube, an intermediate ring tube and an outer ring tube. And an air cooling bushing and an air combustion-supporting bushing are respectively sleeved at the outside of two burning sections. When in operation, the natural gas and air used for ignition are fed through the central ignition tube, and then the mixed air is ignited by an igniting device to form a permanent fire. The mixed air of the natural gas and air in the first burning section is respectively fed to the intermediate ring tube and the outer ring tube, a gas generated by the burning of the mixed air enters a second burning section and is mixed with a second air in the burning section to be burnt, eventually an adjustment to an air quantity in the second burning section can lead a gas temperature of an outlet end of the second burning section to satisfy a temperature raising requirement for a starting-up of the reforming furnace.

Description

The natural gas startup burner

Affiliated technical field

The utility model belongs to the petrochemical iy produced equipment technical field, relates to a kind of Ammonia Production equipment intensification burner, and particularly a kind of being used for starts the natural gas startup burner that heats up to reburner.

Background technology

Along with build fast-developing of current gas engineering both at home and abroad and to the raising day by day of environmental requirement, natural gas just progressively becomes the important source material of Ammonia Production.Up to now, overwhelming majority Ammonia Production enterprise generally adopts the technology path of hydrocarbon conversion preparing synthetic gas on production technology, wherein the conversion reaction of hydrocarbon preferably is to carry out in the conversion tube of catalyst is housed, hydrocarbon gas and steam transform under certain pressure and temperature, the startup stage conversion reaction needed heat supply with by the natural gas startup burner.Because the main component in the natural gas is a methane, and the conversion reaction of methane steam is a strong endothermic reaction, start the requirement that heats up in order to satisfy reburner, realize methane conversion, none does not expect to have higher-quality natural gas startup burner many manufacturing enterprises, but deficiency such as at present various like products well known in the art correspondingly have all that burner outlet temperature excursion is narrower, ignition performance and completing combustion poor-performing and burner shell are easily burnt out.

Summary of the invention

The purpose of this utility model is the problems referred to above of existing at the present technique field, provide a kind of rational in infrastructure, the life-span is long, service efficiency is high and the natural gas startup burner of dependable performance.

The technical solution that adopts is so for achieving the above object: the natural gas startup burner that is provided has the burning zone that chamber, two sections footpaths communicates---(master) burning zone and secondary (pair) burning zone once, arrival end in the primary combustion section overlaps mist loader UNICOM by a secondary porous plate (or cyclone) and, said mist loader is by from the inside to the outside by the coaxial central point fire tube that is nested with of stairstepping arrangement mode, middle endless tube and outer endless tube constitute, be provided with the igniting gas inlet at central point fire tube rear portion, igniting is with air intake and igniter seat, respectively is provided with a gas input port of can be respectively importing for natural gas and air at the rear portion of middle endless tube and outer endless tube; Outside the primary combustion section, be provided with a cooling air jacket pipe, closely on the inwall of this cooling collar be provided with a plurality of apertures that communicate with primary combustion section inner chamber; Outside the second-time burning section, be provided with an air-breathing sleeve pipe, equally also closely on the inwall of this combustion-supporting sleeve pipe be provided with a plurality of apertures that communicate with second-time burning section inner chamber.During this startup burner work; at first feed natural gas and the air that supplies igniting usefulness to the central point fire tube; after lighting, igniter in the primary combustion section, forms ever-burning flame; send into natural gas and air through porous plate (or cyclone) to the primary combustion section respectively by middle endless tube and outer endless tube again; the gaseous mixture of the two is lighted in the primary combustion section; meanwhile feeding the cooling air in the cooling air jacket pipe makes it to form air film near primary combustion section chamber interior walls; do not burnt out in order to protection burning zone housing; the auxiliary air that air mixture subsequently enters in this burning zone of second-time burning Duan Bingyu mixes; burning; by the adjustment of air capacity in the second-time burning section being realized adjusting, guarantee that finally its port of export fuel gas temperature satisfies the requirement that reburner goes into operation and heats up to air and natural gas mixing ratio.

The utility model is owing to adopt the design of two-part burning zone, regulate each burning zone fuel gas temperature by the mixing ratio of adjusting air and natural gas, enter the primary combustion section again after the primary air of primary combustion section and natural gas formerly fully mix by porous plate (or swirler) and burn, thereby have good completing combustion performance and ignition performance.The outlet temperature excursion of this natural gas startup burner is very wide, its excursion is by 250 ℃ to 1000 ℃, product can satisfy the requirement that reburner heats up and starts fully through Xingping Chemical Fertilizer Factory, Shanxi Prov.'s 150,000 tons of conversion of natural gas synthesis gas device reburner trial run and run and normal the use.In addition; for avoiding the primary combustion section to be burnt out because of the chamber interior walls temperature is too high, locular wall adopts the coolant jacket structure, and the cooling air is blown into and forms air film near inwall by the inwall aperture in coolant jacket; thereby effectively protected the burner locular wall, improved the burner life-span.

Description of drawings

Accompanying drawing is the structural representation of a specific embodiment of the utility model.

The specific embodiment

Referring to accompanying drawing, natural gas startup burner described in the utility model comprises two stage combustion section I, II and mist loader three parts.At primary combustion section arrival end, this loader is made of the coaxial central point fire tube 2 that is nested with, middle endless tube 3 and outer endless tube 4 respectively the mist loader from the inside to the outside, and presses the setting of notch cuttype arrangement mode by porous plate or cyclone 5 multi packs.Be provided with at central point fire tube 2 rear portions igniting with gas inlet 21 and igniting with air intake 22 and the igniter seat 23 that is used for the mounting points firearm, be equipped with at its front end and be used to observe the observation lens 1 of usefulness of lighting a fire; Be respectively equipped with a gas inlet 31 at the rear portion of middle endless tube 3 and outer endless tube 4 and a primary air enters the mouth 41.Primary combustion section I communicates in the chamber, footpath each other with second-time burning section II, is fitted with at the antetheca place of primary combustion section I to be used to observe the flame monitor 6 of gas in burning zone internal combustion situation.Cooling air jacket pipe 7 and air-breathing sleeve pipe 8 encircle jacket respectively and put outside two burning zone I, II, all closely on the wall body between two sleeve pipes 7,8 and corresponding burning zone I, II are provided with a plurality of breeder tubes.Label 71 and 72 is a cooling air intake in the accompanying drawing; 81 and 82 are the auxiliary air inlet.

Claims

1, a kind of natural gas startup burner, it is characterized in that having the burning zone (I that chamber, two sections footpaths communicates, II), arrival end in primary combustion section (I) overlaps mist loader UNICOM by a secondary porous plate (5) and, said mist loader is by from the inside to the outside by the coaxial central point fire tube (2) that is nested with of stairstepping arrangement mode, middle endless tube (3) and outer endless tube (4) constitute, be provided with igniting gas inlet (21) at central point fire tube (2) rear portion, igniting is with air intake (22) and igniter seat (23), middle endless tube (3) and outside the rear portion of endless tube (4) respectively be provided with a gas input port (31,41); Outside primary combustion section (I), be provided with a cooling air jacket pipe (7), closely on the inwall of said cooling collar (7) be provided with a plurality of apertures that communicate with primary combustion section (I) inner chamber; Outside second-time burning section (II), be provided with an air-breathing sleeve pipe (8), closely on the inwall of said combustion-supporting sleeve pipe (8) be provided with a plurality of apertures that communicate with second-time burning section (II) inner chamber.

2, natural gas startup burner as claimed in claim 1 is characterized in that linking to each other by a cyclone between said mist loader and primary combustion section (I) arrival end.

3, as claim 1,2 described natural gas startup burners, it is characterized in that between primary combustion section (I) wall, flame monitor (6) being housed, be equipped with at central point fire tube (2) front end and observe lens (1).