CN2040220U

CN2040220U - Multi-function combustor

Info

Publication number: CN2040220U
Application number: CN 88216586
Authority: CN
Inventors: 卫景彬; 黎军; 王宏宇; 邹文华; 叶重阳; 贺文学
Original assignee: Henan danhe power plant; HENAN POWER TEST INST; Institute of Mechanics of CAS
Current assignee: Henan danhe power plant; HENAN POWER TEST INST; Institute of Mechanics of CAS
Priority date: 1988-12-30
Filing date: 1988-12-30
Publication date: 1989-06-28

Abstract

The utility model discloses a multi-function combustor, which can be used as not only a precombustion chamber for the ignition of a pulverized coal boiler, but also a main burner in normal load working and a combustion supporting stabilizer in low load for stably intensifying the combustion and reducing the influence of the combustion operating condition of the boiler on the combustion operating condition of the combustor. The utility model adopts a structure of the combustion chamber whose outer cylinder body is longer than the inner cylinder body, comprising an inner cylinder body, an outer cylinder body, a primary air spout, a secondary air spout on the lower part, an annular secondary air spout and a small spout of the igniting source. The utility model can be used for various pulverized coal boilers of the power stations in large, middle and small capacity or other industry furnaces for combusting pulverized coal. The utility model has the advantages of high safety, stability and reliability, and can save a large quantity of fuel oil.

Description

Multi-function combustor

A kind of station boiler of coal dust burning or multi-functional combustion device of other Industrial Stoves of being applicable to.

The utility model is the flame stabilization burner that grows up on CN86106725A patent of invention basis, can overcome pure body, the easy coking that the swirl flame burner exists, shortcoming easy to wear, because the burner that at present used inside and outside cylindrical shell is formed is under the different operation conditions of boiler, the operating mode of burner itself is subject to the influence of boiler working condition, therefore the utility model adopts and improves exit momentum, and control combustor exit end working condition reduces the anti-influence of boiler working condition to the combustion chamber operating mode to reach.

The purpose of this utility model is to provide a kind of precombustion chamber burner of can deciding again that promptly can be used as under the normal duty operating position, under underrun as the energy-saving burner of combustion-supporting stabilizer.

The utility model when adopting the inner/outer tube structure to increase annular secondary wind, the structure that adopts urceolus to be longer than inner core, and, increase reverse overfire air port at the inner core upper wall according to used different coal situations.

Fig. 1 is an agent structure diagrammatic sketch of the present utility model.

The local agent structure diagrammatic sketch of Fig. 2 reverse secondary wind for upper wall surface has.

Fig. 3 is the side view of Fig. 1 or Fig. 2.

Now in conjunction with the accompanying drawings the utility model principle and enforcement are elaborated:

Open after the secondary wind of bottom, bottom secondary wind is promptly entered in the combustion chamber inner barrel (2) by bottom overfire air port (5), open the air in the wind again one time, then a general mood stream is promptly entered in the combustion chamber inner barrel (2) by a wind snout (4), deflection forms down wall-attached jet under the wind direction, in the combustion chamber, form as shown in Figure 1 by lower wall surface place high velocity air bottom I, drag flow fluid layer II, the flow field structure of countercurrent zone II.Because the existence thereby the combustion chamber lower wall surface of high velocity air bottom I coking and fouling phenomenon can not take place, the high temperature reflux of countercurrent zone II formation simultaneously makes the combustion chamber that the good stable flame effect be arranged.For the rich, high temperature fuel that prevents that combustion chamber inner core (2) from burning out and discharge for combustion chamber inner core (2) flows the supplemental oxygen and the momentum of increasing export, between combustion chamber inner core (2) urceolus (1), inject annular secondary wind by annular secondary wind inlet (6).And combustion chamber inner core (2) port of export and urceolus (1) port of export can improve exit momentum like this at a distance of C, in the time of can preventing the fluctuation of boiler stove internal combustion again to flowing in the combustion chamber and the influence of combustion conditions.In order to improve circulating flow strength in the combustion chamber, can also reverse overfire air port (7) be installed simultaneously at place, combustion chamber inner core (2) upper wall surface rear portion.

The utlity model has reinforcement smooth combustion, prevent combustion chamber lower wall coking, combustor exit place momentum height is subjected to boiler internal combustion operating mode to affect little advantage.

An embodiment of the present utility model adopts structure shown in the accompanying drawing 1, its physical dimension is that a=600mm b=500mm l=1800mm c=60mm is when making precombustion chamber and using in ignition of the boiler, utilize little incendiary source from incendiary source spout (3) precombustion chamber to be lighted, when the normal duty burner of deciding in service uses, strengthen air quantity and the coal dust amount of a wind, make fire extinguishing in the combustion chamber, use by normal spout to get final product. When boiler needs underrun, the air quantity of a wind and coal dust amount are reduced to desirability, improve simultaneously the wind speed of bottom Secondary Air, reduce annular Secondary Air, at this moment circulating flow strength increases in the combustion chamber, then rely on the combustion heat in the Boiler Furnace to rekindle the combustion chamber, the torch of the smooth combustion of combustion chamber ejection this moment can play the effect to Boiler Stable Combustion.

The utility model can be applied on the multiple generating plant pulverized coal boiler and other Industrial Stoves of large, medium and small capacity, and is not only safe and reliable, and energy-conservation fuel-economizing benefit highly significant.

Claims

1, a kind of multifunctional burner, by cylindrical shell inside and outside the combustion chamber, a wind snout, the bottom overfire air port, point burning things which may cause a fire disaster spout, annular overfire air port is formed, and it is characterized in that the muff body slightly is longer than inner barrel.

2, burner according to claim 1 is characterized in that at burner inner core upper wall reverse overfire air port being housed.