CN201110544Y

CN201110544Y - Micro-oil ignition thick-light combustor

Info

Publication number: CN201110544Y
Application number: CNU2007201915408U
Authority: CN
Inventors: 章联兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-12
Filing date: 2007-11-12
Publication date: 2008-09-03
Anticipated expiration: 2017-11-12

Abstract

The utility model discloses a tiny-oil ignition bias burner, which comprises a coal dust ignition chamber, wherein the front end of the coal dust ignition chamber is provided with a changeable abrasion-resistant ring, the front portion of the abrasion-resistant ring is provided with a condensing ring, the middle portion of the coal dust ignition chamber is connected with an oil burner the back portion of the coal dust ignition chamber is connected with a coal dust combusting chamber, a burner nozzle is connected on the back of the coal dust combusting chamber, a swinging condensation plate and a temperature measuring device are arranged on one side of the burner nozzle, and the external periphery of the burner nozzle is designed with inequilateral boarder wind. The burner not only can be used as tiny-oil ignition bias burner, can save fuel, realizes the bias burning, but also has the functions of low N O x combustion, coking resistance and stable combustion.

Description

The tiny-oil ignition shade burner

Technical field

The utility model relates to a kind of little oil burner, particularly relates to the little oil burner that a kind of pulverized-coal fired boiler is realized pulverized coal bias combustion.

Background technology

China is the country of a rich coal, weak breath, weary oil, and coal is China's basic energy resource, relative low price, and the oil and gas price constantly raises.Along with China's rapid economy development, it is urgent day by day to save oily resource task.

Generating plant pulverized coal boiler kindling and low-load combustion-stabilizing consume a large amount of fuel oils, particularly use the lower inferior coal boiler of volatile matter.The oil mass that China is used for pulverized-coal fired boiler black furnace kindling and low-load combustion-stabilizing every year is about 2,000 ten thousand tons, about more than 100 hundred million yuan of fuel cost.

At the big characteristics of generating plant pulverized coal boiler fuel consumption, existing domestic plasma non-oil ignition technology and the tiny-oil ignition pulverized coal combustion successfully developed.But all there is following a few point defect in these two technology: when 1, burner is made main burner and used, do not have steady combustion measure (as bias combustion etc.), combustion efficiency is bad, and underload is not thrown the steady combustion of oil poor performance.2, influenced by the ature of coal volatile matter bigger for the burner combustion effect, for the lower ature of coal of volatile matter, Plasma Firing Technology can not be used (power is too little, high-power untapped come out), and tiny-oil ignition technique effect also undesirable (mainly show the coal dust burnout rate is low, boiler over-emitting black exhaust serious).3, the burner inter deterioration is serious.Plasma ignition coal burner and micro-oil ignition coal powder combusting device all adopt grading design in order to reach oil-saving effect, arrange the combustion chamber in the airduct, and combustion chamber wind-engaging powder airflow scouring, wear extent is big, and only be about 1 year service life usually, and power plant's plan of major repair time is 4 years.4, burner nozzle can not separate with main body, and changing burner nozzle needs whole burner is changed together, the expense height, and workload is big.

The utility model content

The utility model technical problem at first to be solved provides a kind of tiny-oil ignition shade burner that can save great amount of fuel oil.For this reason, the utility model adopts technical scheme as follows: it comprises the coal powder ignition chamber, and middle part, coal powder ignition chamber connects oil burner, and little oil gun, igniter and fire inspection are installed in the oil burner, and the oil burner import is provided with combustion-supporting airduct; Coal powder ignition connects pulverized coal combustor behind the chamber; Connect burner nozzle behind the pulverized coal combustor, the concentrated plate that the monolateral setting of burner nozzle can be swung concentrates plate around the rotating shaft rotation, concentrates plate and is connected with actuator by connecting rod; Burner nozzle is provided with mounting base, and temperature transducer is installed on the mounting base; The circumference bellows that inequilateral is arranged are also designed in the burner nozzle periphery, and circumference bellows front end is provided with blast pipe, and damper is installed on the blast pipe, and described burner also is provided with control cabinet, and control cabinet control concentrates the aperture of plate rotational angle and damper.

The utility model utilizes the oil of trace, lights a spot of coal dust earlier, lights follow-up a large amount of coal dust by the heat of coal dust firing, reaches the replace oil with coal burning, saves the purpose of great amount of fuel oil; Adjust coal powder light-dark by concentrating plate, utilize inequilateral surrounding air technology simultaneously, realize the burning of coal dust horizontal bias, prevent burner region coking and high temperature corrosion, improve the burner underload and do not throw the steady combustion of oil performance.As further technical scheme, the utility model can be provided with replaceable anti-grinding ring before the coal powder ignition chamber, prevents combustion chamber wearing and tearing, prolongs burner service time; Pulverized coal combustor is provided with pulverized coal combustor heat storing and heat preserving mechanism outward, with the catch fire burning of coal dust of reinforcement, improves the coal dust burnout rate, prevents the boiler over-emitting black exhaust; Burner nozzle and main body adopt bolt to flexibly connect, and can change burner nozzle separately, save cost, shorten the work period, reduce labor intensity.

The beneficial effects of the utility model mainly show: when 1, burner is made start-up burner, use the oil (20-50kg/h) of trace, can light a large amount of coal dust (2-9t/h), alternative big oil gun (2-10t/h) provides energy for boiler heating boosts, replace oil with coal burning rate of economizing gasoline is more than 95%; When burner is done the main burner use, need not fuel oil, concentrate the plate angle by regulating, can realize that the coal dust horizontal bias separates, realize the burner bias combustion, can strengthen combustion efficiency, prevent coking of burner region water-cooling wall and high temperature corrosion, strengthen air-flow rigidity (reduce with respect to former burner outlet area, wind speed increases); 2, pulverized coal combustor is designed to have the heat storing and heat preserving combustion chamber of certain space, for the burning of the breeze airflow that catches fire provides a stable combustion space, effectively strengthens the coal dust firing effect, improves the coal dust burnout rate; 3, the anti-grinding ring that can independently change of coal powder ignition chamber front end setting, should adopt the casting of high-strength alloy material to form by anti-grinding ring, have very strong abrasionproof effect, normally use more than 2 years, this anti-grinding ring also can be changed when boiler normally moves, after reaching projected life, only need to change anti-grinding ring, and need not to change burner, save great amount of cost, reduce labor intensity, reduce the boiler shutdown number of times; 4, burner nozzle and main body adopt bolt to flexibly connect, and can change burner nozzle separately, save the burner maintenance cost, reduce labour intensity; 5, control system can be regulated the rotational angle that concentrates plate on the one hand automatically according to the temperature signal of burner nozzle temperature measuring equipment feedback, regulates burner outlet Pulverized Coal Concentration ratio automatically; The aperture of also adjustable on the other hand complete cycle circle airduct adjusted air door is adjusted the size of circumference air quantity, guarantees burner nozzle noncoking, indeformable and not by scaling loss.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment provided by the utility model.

Fig. 2 is a tiny-oil ignition shade burner spout schematic diagram embodiment illustrated in fig. 1.

Fig. 3 is a concentrated plate functional schematic embodiment illustrated in fig. 1.

Fig. 4 is that burner embodiment illustrated in fig. 1 is arranged in stove and stove internal combustion mode schematic diagram.

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.

Tiny-oil ignition shade burner shown in Figure 1 comprises coal powder ignition chamber 7, and coal powder ignition chamber 7 front ends are provided with replaceable anti-grinding ring 5, and anti-grinding ring 5 front portions are provided with and concentrate ring 3; 7 middle parts, coal powder ignition chamber connect oil burner 16, and little oil gun 13, igniter 12 and fire inspection 14 are installed in the oil burner 16, and oil burner 16 imports are provided with combustion-supporting airduct 15; Connect pulverized coal combustor 8 behind the coal powder ignition chamber 7; Connect burner nozzle 20 behind the pulverized coal combustor 8, the concentrated plate 10 that burner nozzle 20 monolateral settings can be swung concentrates plate 10 around rotating shaft 9 rotations, concentrates plate 10 and is connected with actuator 2 by connecting rod 6; Design has mounting base 11 on the burner nozzle 20, and temperature transducer 4 is installed on the mounting base 11, and this sensor can adopt armoured thermocouple; Burner nozzle 20 peripheries also are provided with the circumference bellows 19 that inequilateral is arranged, circumference bellows 19 front ends are provided with blast pipe 18, and damper 17 is installed on the blast pipe 18; Whole burner also is provided with control cabinet 1, and by the signal of temperature transducer 4 feedbacks, control concentrates the aperture of plate 10 rotational angles and damper 17.

Figure 2 shows that tiny-oil ignition shade burner spout, concentrate plate 10 borders and be designed to zigzag, avoid concentrating backboard portion and form big negative pressuren zone, the deposition coal dust.The adjustable angle that concentrates plate 10 is good with the 0-30 degree.

Described coal powder ignition chamber 7 sectional areas are the 20-40% of combustor inlet area, and length is the 10-15% of whole burner.The 1.2-2.5 that described pulverized coal combustor 8 sectional areas are coal powder ignition chamber 7 sectional areas times, length accounts for the 50-80% of whole burner.Adopt above-mentioned setting can further improve efficiency of combustion.

In the present embodiment, the described pulverized coal combustor 8 outer heat storing and heat preserving mechanisms that are provided with pulverized coal combustor, this heat storing and heat preserving mechanism can be at the outdoor heat-insulation layer that is made of insulation material of coal dust firing.

Figure 3 shows that and concentrate plate 10 concentration principle, when concentrated plate 10 crosswind powder airflow strikes concentrate plate 10, the angled bounce-back of pulverized coal particle, most of coal dust enters and concentrates zone, plate 10 opposite, thereby make burner nozzle 20 outlets one side coal powder density height, the opposite side coal powder density is low, can be by adjusting the angle control burner nozzle 20 both sides coal powder density ratios that concentrate plate 10.

Figure 4 shows that tiny-oil ignition shade burner arrangement in stove, direction of rotation according to gas stream in the stove, the side that burner nozzle 20 coal powder densities are high is arranged in side towards the fire, it is the flame upstream, high concentration be convenient to breeze airflow quick fire burns, form stable ignition source, the stable light side breeze airflow that ignites keeps whole burner outlet breeze airflow combustion stability.

The utility model is when ignition of the boiler, at first start the igniter 12 that is arranged in the oil burner 16, the fuel oil of some oil combustion gun 13 ejections, after fire inspection 14 detects oil firing flame, halt firearm 12, the combustion-supporting airduct 15 of oil is sent into enough oxygen amounts and is impelled fully burning of oil, and the flame behind the oil firing enters coal powder ignition chamber 7; Encircle 3 breeze airflows that concentrate and thermal-flame mixed combustion in coal powder ignition chamber 7 of oil firing through concentrating, the breeze airflow that part is caught fire is fully burning in combustion chamber 8, flame after the burning sprays into burner hearth through burner nozzle 20, according to the temperature that is installed in temperature transducer 4 feedbacks on the burner nozzle 20, the aperture of control circumference airduct damper keeps burner nozzle 20 in certain temperature range.This process is a black furnace tiny-oil ignition process, and at this moment, burner need not bias combustion, and the concentrated plate 10 that is arranged in burner nozzle 20 inside is inner concordant with burner nozzle 20.

The utility model is when boiler de-oiling underload, and by the program that controller 1 is provided with, control actuator 2 will concentrate plate 10 and rotate a certain angle around rotating shaft 9, makes burner nozzle 20 form bias combustion.According to the real time temperature data of temperature measuring equipment 4 feedbacks, controller 1 is constantly adjusted the angle that concentrates plate 10 by actuator 2, keeps the burner nozzle temperature in the temperature range of design, thereby guarantees the burner safe and stable operation.

Claims

1, a kind of tiny-oil ignition shade burner, it is characterized in that it comprises coal powder ignition chamber (7), middle part, coal powder ignition chamber (7) connects oil burner (16), little oil gun (13), igniter (12) and fire inspection (14) are installed in the oil burner (16), and oil burner (16) import is provided with combustion-supporting airduct (15); Connect pulverized coal combustor (8) behind the coal powder ignition chamber (7); Connect burner nozzle (20) behind the pulverized coal combustor (8), the concentrated plate (10) that the monolateral setting of burner nozzle (20) can be swung concentrates plate (10) around rotating shaft (9) rotation, concentrates plate (10) and is connected with actuator (2) by connecting rod (6); Burner nozzle (20) is provided with mounting base (11), and mounting base (11) is gone up temperature transducer (4) is installed; The peripheral circumference bellows (19) that also design the inequilateral layout of burner nozzle (20), circumference bellows (19) front end is provided with blast pipe (18), blast pipe (18) is gone up damper (17) is installed, described burner also is provided with control cabinet (1), and control cabinet (1) control concentrates the aperture of plate (10) rotational angle and damper (17).

2, a kind of tiny-oil ignition shade burner according to claim 1 is characterized in that: described concentrated plate (10) border is a zigzag.

3, a kind of tiny-oil ignition shade burner according to claim 1 is characterized in that: the adjustable angle that concentrates plate (10) is the 0-30 degree.

4, a kind of tiny-oil ignition shade burner according to claim 1 is characterized in that: described coal powder ignition chamber (7) sectional area be the 20-40% of combustor inlet area, length is the 10-15% of whole burner.

5, a kind of tiny-oil ignition shade burner according to claim 1 is characterized in that: described pulverized coal combustor (8) sectional area is 1.2-2.5 a times of coal powder ignition chamber (7) sectional area, and length accounts for the 50-80% of whole burner.

6, a kind of tiny-oil ignition shade burner according to claim 1 is characterized in that: coal powder ignition chamber (7) front end is provided with replaceable anti-grinding ring (5).

7, a kind of tiny-oil ignition shade burner according to claim 6 is characterized in that: the coal powder ignition chamber (7) of anti-grinding ring 5 front portions is provided with and concentrates ring (3).

8, a kind of tiny-oil ignition shade burner according to claim 1 is characterized in that: the outer heat storing and heat preserving mechanism that is provided with pulverized coal combustor of pulverized coal combustor (8).