CN2830897Y

CN2830897Y - Micro oil gasified boiler ignitor

Info

Publication number: CN2830897Y
Application number: CN 200520045531
Authority: CN
Inventors: 鞠胤红; 李峤松; 杨晓芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-10-09
Filing date: 2005-10-09
Publication date: 2006-10-25
Anticipated expiration: 2015-10-09

Abstract

The utility model discloses a micro oil gasifying boiler ignitor, particularly a direct ignitor for a power station boiler. The utility model comprises an oil gun, a primary burning chamber, a secondary burning chamber and a shell body, wherein the primary burning chamber is arranged on the coal powder inlet position in the shell body; the oil gun is installed on the side wall of the primary burning chamber and forms a certain oblique angle together with the side wall; the shell body is composed of an inner shell and an outer shell which is sheathed on the inner shell; one secondary air hollow ring is formed between the inner and the outer shells; the secondary burning chamber is sheathed on the inner shell and is in clearance fit connection with the inner shell; a secondary air inlet pipe is connected with the outer shell and is communicated with the secondary air hollow ring. Coal powder entering the burning chamber can be directly ignited by a small oil gun; a magnifying torch can be obtained through energy; more coal powder can be ignited in the secondary burning chamber; thereby, the oil consumption can be reduced; moreover, the utility model has the advantages of small device investment, system simplification and small maintenance quantity; the electric precipitation can be carried out in starting and stopping processes.

Description

Little oil gas ignition of the boiler device

Technical field

The utility model relates to a kind of direct fire unit of station boiler, refers to a kind of little oil gas ignition of the boiler device that domestic station boiler uses that is used for especially.

Background technology

Statistics in 2003, about 5,120,000 tons of national power plant soot unit fuel consumption is boiler and opens, stops and low-load combustion-stabilizing oil.At present, the igniter of domestic station boiler use has low-load combustion-stabilizing (bluff body, hull, plow-shape, high speed difference, binary channels etc.) burner, common small oil gun igniter, plasma non-oil ignition device.All there is different problems in actual applications in above igniter.The low-load combustion-stabilizing burner opens, stops using oil to no effect to reducing boiler; Common small oil gun igniter Oil Gun is bigger than normal, and initial start stage can not drop into cleaner; Plasma non-oil ignition device one-time investment is huge, system complex, maintenance are big, is suitable for that coal is narrow, ignition success rate is on the low side.Simultaneously, in the prior art, the igniting of boiler directly improves chamber temperature gradually by the oil gun oil jetting combustion, the coal dust that ignites, and this has also caused the consumption of fuel oil to strengthen.

Summary of the invention

For overcome in the prior art ignition of the boiler device open, stop at boiler and low-load combustion-stabilizing in big with oil mass, can not drop into electric precipitation during the start and stop and deficiency such as equipment investment is huge, system complex, maintenance are big, the utility model provides a kind of little oil gas ignition of the boiler device, this device has realized that boiler opens, stops and few oil mass of using of low-load combustion-stabilizing, small investment, system is simple, maintenance is little, can drop into electric precipitation during the start and stop.

The utility model has adopted following technical scheme: a kind of little oil gas ignition of the boiler device, comprise oil gun, the primary zone, secondary combustion chamber, housing, the primary zone is installed in coal dust import department in the housing, the primary zone is horn-like increaser, oil gun is installed on the sidewall of horn-like increaser, and become a fixed inclination with sidewall, housing is made up of inner casing and shell, shell is enclosed within on the inner casing, form a secondary wind idle loop between the inside and outside shell, secondary combustion chamber is socketed on the inner casing and with the inner casing matched in clearance and is connected, and secondary wind inlet tube is connected on the shell and with secondary wind idle loop and is connected.

The oblique angle α of oil gun and primary zone is 55 degree.Form an idle loop between primary zone and the housing.

The beneficial effects of the utility model are: utilize compressed-air actuated high-speed jet will expect that oil directly smashes, being atomized into ultra-fine oil droplet burns, the heat that burning produces carries out initial stage heating, dilatation, later stage heating to fuel, in the extremely short time, finish the evaporation gasification of oil droplet, make oil gun direct burning gases fuel in the normal combustion process, thereby improve efficiency of combustion and flame temperature greatly.Directly lighting the 300-500kg/h, the concentration that enter the combustion chamber by small oil gun is the coal dust of 0.40-0.6kg/kg, and the torch that is obtained amplifying by energy is lighted more coal dust at secondary combustion chamber more then, so just can reduce greatly and use oil mass.Simultaneously, not only strengthened burning owing to only increased secondary combustion chamber and secondary wind inlet tube, and make that equipment investment is little, system simplification, maintenance be little, can drop into electric precipitation during the start and stop.

Description of drawings

Fig. 1 is an overall structure schematic diagram of the present utility model.

The drawing reference numeral explanation:

1-oil gun 2-primary zone

3-secondary combustion chamber 4-inner casing

5-shell 6-idle loop

7-secondary wind idle loop 8-secondary wind inlet tube

The specific embodiment

The utility model is described in further detail below in conjunction with description of drawings and the specific embodiment.

As Fig. 1, little oil gas ignition of the boiler device, comprise oil gun 1, primary zone 2, secondary combustion chamber 3, housing, primary zone 2 is installed in coal dust import department in the housing, primary zone 2 is horn-like increaser, oil gun 1 is installed on the sidewall of horn-like increaser, and become a fixed inclination with sidewall, angle is approximately the 45-55 degree, housing is made up of inner casing 4 and shell 5, and shell 5 is enclosed within on the inner casing 4, forms a secondary wind idle loop 7 between the inside and outside shell, secondary combustion chamber 3 is socketed on the inner casing 4 and with inner casing 4 matched in clearance and is connected, and secondary wind inlet tube 8 is connected on the shell 5 and with secondary wind idle loop 7 and is connected.

The thermal-flame that small oil gun 1 gasification, and combustion produces is at first lighted the dense phase pulverized coal that enters primary zone 2, and then enter secondary combustion chamber 3 by the dense phase pulverized coal of having lighted and light the dilute phase coal dust, spraying into furnace chamber at last burns away, can obtain bigger heat energy, satisfy boiler and open, stop and the requirement of low-load combustion-stabilizing.Be idle loop 6 between the inwall of primary zone 2 and housing, idle loop 6 can cool off primary zone's 2 sidewalls, has improved the service life of combustion chamber.Secondary wind enters secondary wind idle loop 7 by secondary wind inlet tube 8, replenishes the required oxygen of secondary combustion chamber 3 internal combustion, and the two-stage idle loop is mainly used in protection spout safety, prevents that coking, combustion from undermining the later stage coal dust firing requisite oxygen amount of replenishing.Draw by type approval test: the technical scheme of using the utility model to provide, but adopt primary zone, this multistage pulverized coal combustion firing coal-dust 3-5t/h of secondary combustion chamber, and reduced greatly and used oil mass.

Claims

1, a kind of little oil gas ignition of the boiler device, comprise oil gun (1), primary zone (2), secondary combustion chamber (3), housing, primary zone (2) is installed in coal dust import department in the housing, primary zone (2) is horn-like increaser, oil gun (1) is installed on the sidewall of horn-like increaser, and become a fixed inclination with sidewall, it is characterized in that:

Housing is made up of inner casing (4) and shell (5), shell (5) is enclosed within on the inner casing (4), form a secondary wind idle loop (7) between the inside and outside shell, secondary combustion chamber (3) is socketed in inner casing (4) and upward and with inner casing (4) matched in clearance is connected, and secondary wind inlet tube (8) is connected to shell (5) and upward and with secondary wind idle loop (7) is connected.

2, little oil gas ignition of the boiler device according to claim 1 is characterized in that: described oil gun (1) is 55 degree with the oblique angle α of primary zone (2).

3, little oil gas ignition of the boiler device according to claim 1 is characterized in that: form an idle loop (6) between described primary zone (2) and the housing.