CN201496958U

CN201496958U - W-flame cyclone separation low-oil ignition burner

Info

Publication number: CN201496958U
Application number: CN2009203057735U
Authority: CN
Inventors: 郑平安
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-07
Filing date: 2009-07-07
Publication date: 2010-06-02
Anticipated expiration: 2019-07-07

Abstract

The utility model provides a W-flame cyclone separation low-oil ignition burner. The ignition burner comprises a cyclone barrel and an exhaust pipe and a combustion barrel, which are communicated coaxially with the cyclone barrel, wherein the cyclone barrel consists of a straight tube and a conical tube connected with the straight tube, and a throat opening is formed at the end port of the conical tube; a powdered coal jet hole is arranged at the lower end of the cyclone barrel, and a powdered coal circumferential air hole is arranged on the outer side of the powdered coal jet hole; and the combustion barrel and the cyclone barrel are arranged coaxially to an exhaust inlet tube. The ignition burner further comprises a resistance absorber arranged coaxially to the cyclone barrel and the exhaust inlet tube, wherein the upper end of the resistance absorber is fixedly connected with the exhaust inlet tube and the lower end thereof is fixedly connected with the oblique surface of the conical tube through a rib plate. The W-flame cyclone separation low-oil ignition burner solves the technical problem of high oil consumption during the ignition start-up of the W-flame boiler, has the advantages of low loss of turbulent kinetic energy, high separation efficiency and good combustion-stabilizing effect, and can greatly reduce the emission of NOx and protect the environment.

Description

W flame cyclonic separation few-oil ignition combustion device

Technical field

The utility model relates to the few-oil ignition combustion device, is specifically related to a kind of W flame cyclonic separation few-oil ignition combustion device.

Background technology

China is a rich coal resources, and the deficient relatively country of oil, natural gas resource, coal can't change in quite long from now on period as this situation of main energy sources, breeze airflow is difficult to catch fire and after-flame is its characteristics, though and coal resources in China is abundant, coal is changeable, ature of coal is relatively poor, as the power industry of major power consumer, the thermal power plant coal-powder boiler is when the black furnace ignition trigger, and the fuel consumption that is used to light a fire is very big.The usual manner ignition trigger all adopts the large-scale oil combustion device that is arranged in the overfiren air port, when the total specified fuel consumption of oil gun is about the boiler rated load 30% of calory burning, need to continue several hrs, after burner hearth is all reached a high temperature everywhere, just throw the powder burning, and mix to burn behind the suitable load and just progressively remove oil according to the rules regulation, so fuel consumption is quite big during the black furnace ignition trigger.

In recent years, domestic coal state of supply worsened, and power plant is forced to use ash content height, colm that calorific value is low, the phenomenon of high load capacity fire extinguishing happens occasionally, need often to throw the combustion-supporting steady combustion of oil in order to stablize the stove internal combustion, cause to consume a large amount of combustion-supporting oil, the consumption of combustion-supporting oil is often much larger than starting oil consumption.Whole nation thermal power plant every year is because of nearly 15,000,000,000 yuans of the expense of ignition trigger and combustion-supporting oil consumption, and along with domestic product oil price continues to raise up, this expense is also continuing to increase, and the production cost of electric power enterprise is constantly risen.Though and coal resources in China is abundant, but coal is changeable, ature of coal is relatively poor, a large amount of power plant use meager coal, colm, anthracite, the oil consumption of these power plant is much higher than the power plant that uses brown coal, bituminous coal, therefore, the main direction that reduces the station boiler oil consumption significantly should be conceived to use meager coal, colm, anthracitic unit, and the high problem of thermal power generation corporations' oil consumption is solved with obtaining.

At the big technical problem of ignition trigger fuel consumption, domestic at the mid-80 in last century, developed few oily coal dust direct-fire burner; About 2000, develop the plasma non-oil ignition technology; Developed meager coal cold state ignition under tiny oil and steady burning burner in ultra low load in 2005.Though small oil gun start-up burner coal adaptability is wide, oil consumption is still higher; The plasma non-oil ignition technology only obtains to use at present on brown coal, bituminous coal; Application number is " 200510049732.0 "; Chinese invention patent, and name of patent application is: " directly firing coal-dust burner ", application number is " 200320129380.6 "; Be " a kind of micro oil, gas firing coal-dust burner " with name of patent application, the burner application that application number is introduced for the utility model patent of " 200320103151.7 " is in using anthracite, colm, meager coal unit, and effect is undesirable.

W flame is as the anthracitic boiler of special burning, because its combustion system and burner structure are special and use anthracitic characteristics, so far there is not otherwise effective technique to use to realize that few-oil ignition starts, and that the W flame furnace uses anthracite is effective, therefore the unit number that puts into operation increases year by year, and therefore the few-oil ignition combustion utensil of suitable such unit of exploitation has certain market prospect.The supporting burner of W flame combustion mode roughly has eddy flow, clearance type direct current, several patterns of the dense dilute phase straight-through pulverized coal burner of cyclonic separation type.The cyclonic separation coal burner is used at most, and the dense dilute phase coal burner structure of whirlwind is provided with the racemization adjusting device as shown in Figure 1 in whirlwind, and concentrated phase and the light alternate shutoff door that has, also can dense dilute phase be worked simultaneously at concentrated phase work separately.Coal dust and air mixture are when entering burner, because centrifugation has produced rotation, the spin intensity when leaving spout for controlling it, each coal burner have an adjusting device.It is formed by an adjusting rod and by the prismatic blade of its location, and the position of lifting regulating rod changes the position of blade in spout, can influence the swirl strength of mixture.Big, the inferior separating effect of drag losses during shortcoming that this cyclonic separation moulded coal powder burner exists; The residual rotation momentum is unfavorable for smooth combustion, and there is the big defective easy to wear of resistance in set adjusting device baffle plate racemization.

Summary of the invention

The big technical problem of fuel consumption when solving W flame furnace ignition trigger, the purpose of this utility model are that using maximum cyclonic separation moulded coal powder burners at this type of furnace provides a kind of W flame cyclonic separation few-oil ignition combustion device.

The W flame cyclonic separation few-oil ignition combustion device that the utility model provides comprises the whirlwind tube, with coaxial blast pipe that is connected of whirlwind tube and oil combustion device, described whirlwind tube is by straight tube, and the Taper Pipe that is connected with straight tube composition, and the port of described Taper Pipe is provided with aditus laryngis; Be communicated with the coal dust inlet tube on the described straight tube; Described blast pipe is by weary gas inlet tube, weary gas blowout pipe, and the weary gas elbow that connects weary gas inlet tube and weary gas blowout pipe is formed; The spout arranged outside of described weary gas blowout pipe has weary gas circumference air port, and described weary gas elbow is provided with weary controlled atmosphere joint butterfly valve, and the lower end of described whirlwind tube is provided with the coal dust spout, and the arranged outside of described coal dust spout has coal dust circumference air port; The combustion barrel of described oil combustion device and whirlwind tube and the coaxial setting of weary gas inlet tube; Described start-up burner also comprises the resistance absorber with whirlwind tube and the coaxial setting of weary gas inlet tube; Described resistance absorber upper end is connected with weary gas inlet tube, and the lower end is connected by the inclined-plane of gusset and Taper Pipe.

Above-mentioned resistance absorber lower end is positioned at the 2/6-5/6 place of Taper Pipe total height to the height of aditus laryngis.

Above-mentioned resistance absorber lower end is positioned at 1/3 place of whirlwind cone pipe bottom to the height of aditus laryngis.

The upper end of above-mentioned resistance absorber and weary gas inlet tube inwall are welded in one.

Above-mentioned resistance absorber is spoke-like, and is symmetricly set on the circumference between combustion barrel and the weary gas inlet tube.

The hypotenuse inclination alpha of above-mentioned described resistance absorber is identical with the hypotenuse angle of inclination beta of whirlwind cone pipe.

The length of above-mentioned resistance absorber is identical with the diameter of blast pipe inwall.

The outer wall of above-mentioned aditus laryngis is provided with the temperature-measuring heat couple device.

Above-mentioned whirlwind cone pipe is provided with the adjusting bellows.

The utlity model has following technique effect:

W flame cyclonic separation few-oil ignition combustion device becomes the sub-burner of common whirlwind the multifunctional burner with igniting fuel-economizing and normal operation function; Wherein the homogenizing interior flow field is set, reduces the turbulence energy loss of resistance absorber reduced flow passage resistance, the separative efficiency height, has energy-saving effect; Because separative efficiency improves, rich-lean ratio increases, and surely fires effectively, and the generation level of NOx is reduced significantly, helps environmental protection.

Description of drawings

Fig. 1 is the dense dilute phase burner structure schematic diagram of whirlwind;

Fig. 2 is the vertical view of the dense dilute phase burner of whirlwind;

Fig. 3 is a structural representation of the present utility model;

Fig. 4 is a vertical view of the present utility model;

Fig. 5 is the utility model A-A direction view;

Fig. 6 is the utility model B-B direction view.

Description of reference numerals:

1-whirlwind tube, 101-whirlwind tube straight tube, 102-whirlwind cone pipe, 103-aditus laryngis; 2-coal dust inlet tube; The 3-blast pipe, 301-lacks the gas inlet tube, and 303-lacks the gas blowout pipe, and 302-lacks the gas elbow, and 304-lacks gas circumference air port; 4-regulates butterfly valve; The 5-oil combustion device; The 6-resistance absorber; 7-temperature-measuring heat couple device; 8-regulates bellows; The 9-gusset; 10-coal dust spout, 11-coal dust circumference air port.

The specific embodiment

The W flame cyclonic separation few-oil ignition combustion device that the utility model provides comprises whirlwind tube 1, with whirlwind tube 1 coaxial blast pipe that is connected 3 and oil combustion device 5, whirlwind tube 1 is by straight tube 101, and Taper Pipe 102 compositions that are connected with straight tube 101, and the port of Taper Pipe 102 is provided with aditus laryngis 103; Be communicated with coal dust inlet tube 2 on the straight tube 101; Blast pipe 3 is connected weary gas inlet tube 301 and is formed with the weary gas elbow 302 of weary gas blowout pipe 303 by weary gas inlet tube 301, weary gas blowout pipe 303; The spout arranged outside of weary gas blowout pipe 303 has weary gas circumference air port 304, and weary gas elbow 302 is provided with weary controlled atmosphere joint butterfly valve 4, and the lower end of whirlwind tube 1 is provided with coal dust spout 10, and the arranged outside of coal dust spout 10 has coal dust circumference air port 11; The combustion barrel of oil combustion device 5 and whirlwind tube 1 and the 301 coaxial settings of weary gas inlet tube; This start-up burner also comprises the resistance absorber 6 with whirlwind tube 1 and weary gas inlet tube 301 coaxial settings; Resistance absorber 6 upper ends and weary gas inlet tube 301 inwalls are welded in one, and the lower end is connected by the inclined-plane of gusset 9 with Taper Pipe 102; Resistance absorber 6 upper ends are identical with 301 internal diameters with the width of weary gas inlet tube 301 joints; The lower end width is the width dimensions that is retracted to 1/3 place according to identical cone angle with the whirlwind tube naturally, and resistance absorber hypotenuse turning point is identical with whirlwind cone pipe constriction point.Resistance absorber 6 lower ends are positioned at the 2/6-5/6 place of Taper Pipe 102 total heights to the height of whirlwind aditus laryngis 103, are positioned at 1/3 place's best results.Resistance absorber 6 is made up of the several piece plank, and is spoke-like and is symmetrically arranged between oil combustion device combustion barrel 5 and the weary gas inlet tube 301 on the circumference, and its hypotenuse inclination angle is identical with the inclination angle of whirlwind cone pipe 102.For the indicated temperature level reflection state of catching fire that ignites, temperature-measuring heat couple device 7 is set at the outer wall of aditus laryngis 103.The adjusting bellows 8 that are provided with on the whirlwind cone pipe 102 are indicated according to temperature and are regulated the air quantity size, can guarantee that coal dust spout, cyclone collar partly are in below the safe temperature value, and guarantee its service life.

Operation principle of the present utility model is as follows:

Referring to Fig. 3-shown in Figure 6, W flame cyclonic separation few-oil ignition combustion device is normally in service, and breeze airflow 2 enters from entering the mouth, the concentrated phase air-flow from 10 ejections of coal dust spout, light phase air-flow from weary gas blowout mouth 303 ejections, identical with previous status.In ignition process, blast pipe road control valve 4 is adjusted to appropriate position aperture, regulate coal pulverizer ventilation and coal-supplying amount, the breeze airflow that enters according to the igniting different phase can be all, the most of or ratio of normally shunting sprays from coal dust spout 10, oil combustion device 5 work this moment, the heat that oil firing produces ignites from the dense phase pulverized coal air-flow of coal dust spout ejection, at this moment the concentrated phase air-flow is that torch jet based on coal dust firing enters burner hearth, thereby with a small amount of oil firing heat a large amount of coal dusts that ignite, finish cold conditions ignition trigger process, reach fuel-efficient purpose.The temperature-measuring heat couple device indicated temperature level that is provided with in cyclone collar portion and reflect the state of catching fire that ignites, the adjusting bellows are indicated according to temperature and are regulated the air quantity size, can guarantee that coal dust spout, cyclone collar partly are in below the safe temperature value, to guarantee its service life.

Claims

1. W flame cyclonic separation few-oil ignition combustion device, comprise whirlwind tube (1), with coaxial blast pipe that is connected of whirlwind tube (1) (3) and oil combustion device (5), described whirlwind tube (1) is by straight tube (101), and the Taper Pipe (102) that is connected with straight tube (101) composition, the port of described Taper Pipe (102) is provided with aditus laryngis (103); Be communicated with coal dust inlet tube (2) on the described straight tube (101); Described blast pipe (3) is connected weary gas inlet tube (301) and is formed with the weary gas elbow (302) of weary gas blowout pipe (303) by weary gas inlet tube (301), weary gas blowout pipe (303); The spout arranged outside of described weary gas blowout pipe (303) has weary gas circumference air port (304), described weary gas elbow (302) is provided with weary controlled atmosphere joint butterfly valve (4), the lower end of described whirlwind tube (1) is provided with coal dust spout (10), and the arranged outside of described coal dust spout (10) has coal dust circumference air port (11); The combustion barrel of described oil combustion device (5) is coaxial with whirlwind tube (1) and weary gas inlet tube (301); It is characterized in that: described start-up burner also comprises and whirlwind tube (1) and the coaxial resistance absorber (6) of weary gas inlet tube (301); Described resistance absorber (6) upper end is connected with weary gas inlet tube (301), and the lower end is connected by the inclined-plane of gusset (9) with Taper Pipe (102).

2. W flame cyclonic separation few-oil ignition combustion device according to claim 1, it is characterized in that: described resistance absorber (6) lower end is positioned at the 2/6-5/6 place of Taper Pipe (102) total height to the height of aditus laryngis (103).

3. W flame cyclonic separation few-oil ignition combustion device according to claim 1 and 2, it is characterized in that: described resistance absorber (6) lower end is positioned at 1/3 place of whirlwind cone pipe (102) bottom to the height of aditus laryngis (103).

4. W flame cyclonic separation few-oil ignition combustion device according to claim 3, it is characterized in that: the inwall of the upper end of described resistance absorber (6) and weary gas inlet tube (301) is welded in one.

5. W flame cyclonic separation few-oil ignition combustion device according to claim 4, it is characterized in that: described resistance absorber (6) is spoke-like, and is symmetricly set on the circumference between combustion barrel (5) and the weary gas inlet tube (301).

6. W flame cyclonic separation few-oil ignition combustion device according to claim 5 is characterized in that:described resistance absorber (6) hypotenuse inclination angle is identical with the hypotenuse inclination angle of whirlwind cone pipe (102).

7. W flame cyclonic separation few-oil ignition combustion device according to claim 6, it is characterized in that: the outer wall of described aditus laryngis (103) is provided with temperature-measuring heat couple device (7).

8. W flame cyclonic separation few-oil ignition combustion device according to claim 7 is characterized in that: be provided with on the described whirlwind cone pipe (102) and regulate bellows (8).