CN1084459C - Burner of light oil for gasifying type conbustion - Google Patents

Abstract

A gasification combustion device for burning light oil, relating to a gasification combustion device using light oil such as kerosene, light diesel oil or crude methanol as fuel. Based on the electric heating gasification combustion device, the present invention adopts the combustion method and its structure combining electric heating gasification and flue gas heating gasification. A resistance control valve is provided to control the on-off of oil evaporation. Therefore, the device not only has good low-load combustion stability and strong adjustment ability, high combustion efficiency, no smoke and dust and peculiar smell when starting and extinguishing the fire, so as to achieve the purpose of high efficiency and low pollution, but also save electric energy, which is convenient for popularization and application .

Description

A kind of burner of light oil for gasifying type conbustion

The present invention relates to a kind of liquid fuel gasification formula burner, particularly a kind of is the gasified combustion device of fuel with light oil such as kerosene, light diesel fuel or thick methyl alcohol etc.

At present, no matter be kerosene, light diesel fuel or thick methyl alcohol etc., be widely used in the various aspects of producing, living as liquid fuel.Since light oil (not comprising gasoline) at room temperature volatility a little less than, igniting and after-flame be difficulty comparatively, thereby mostly adopts gasification mode to use light oil in the prior art.Using in the technology and device of light oil in China, adopt the combustion system of direct heating and gasifying of flame and gravity-flow ventilation mostly, is exactly to adopt above-mentioned combustion system as disclosed burners such as Chinese patents 91106743,92231876,93111442.This class device exists and starts difficulty, and what regulating power the underload poor stability is born a little less than, easily ties problems such as carbon dirt in the flue gas in CO and carbon black discharging instability, the heating tube, has influenced the overall performance of device, comprises stability, reliability and efficiency of combustion etc.

In developed country, it is comparatively general in Japan to use gasification mode to use the burner of light oil, because Japan does not almost have natural gas, have only the higher artificial coal gas of price, and there are a large amount of light oil byproducts in petroleum refining industry, cheap.In the product sold, generally adopt the combustion technology and the structure of electrical heating gasification, forced air supply, premixed combustion, staged air distribution on present Japanese market, overall performance is better.As Japanese patent application (application number: the flat 6-206660 of special Willing; 4-313093) etc. disclosed technology and device then belong to this type of.But the problem that this class device exists is to start, having when putting out a fire flue dust (carbon black) and peculiar smell to produce, and power consumption is also higher, is not easy to promotion and application.

Deficiency and defective at the prior art existence, purpose of the present invention and task provide a kind of new gasified combustion device that uses light oil, this burner not only will have the good and stronger regulating power of low-load combustion-stabilizing, the efficiency of combustion height, when starting and put out a fire, do not have flue dust and peculiar smell, thereby reach the purpose of high-efficiency low-pollution; But also can save electric energy, be easy to be extended and applied.

Purpose of the present invention and task are achieved by the following technical solution: it mainly comprises by fueller, pulse pump, the oil piping system that electrical heating gasifier and oil pipe are formed, blower fan, be arranged on an aerofoil of below, combustion chamber, the secondary aerofoil, mixing chamber, air channel of being made up of the inner and outer wall of combustion chamber and the tertiary air hole that is arranged on the inwall of combustion chamber are formed, it is characterized in that between fueller and electrical heating gasifier, increasing another oil circuit, this oil circuit is by another pulse pump, flue gas heating and gasifying device is formed, and the outlet of flue gas heating and gasifying device links to each other with the electrical heating gasifier.Above-mentioned flue gas heating and gasifying device is arranged on the inner wall outside of combustion chamber.

This device opens in order to make, the stopping time opens and closes oil circuit fast, so that reach the purpose of lighting rapidly and stopping working, the present invention is provided with a solenoid electric valve on the oil pipe between electrical heating gasifier and the mixing chamber.In addition, for regulate different operating conditions next, the proportioning of secondary air flow, be used to regulate the air door of primary air flow and secondary air flow proportioning ducting outlet being provided with, to reach further smooth combustion, to reduce the purpose of polluting.

Accompanying drawing 1 is the stereogram that uses the gasified combustion device of light oil.

Accompanying drawing 2 is a principle assumption diagram of the present invention.Among the figure: 1. oil pump on 12. outer wall of combustion chamber, 13. combustion chamber inwalls, 14. electric igniters, 15. flame detectors, 16. pulse pump A, the 17. pulse pump B 18. of 10. blower fans, 11. tertiary air holes, aerofoil of fueller 2. electrical heating gasifiers, 3. flue gas heating and gasifying device 4. magnetic valves, 5. air door 6. mixing chambers, 7. burners 8. burner secondary aerofoils, 9. combustion chambers

Describe operation principle of the present invention in detail below in conjunction with accompanying drawing, concrete structure and preferred forms:

The present invention mainly is made up of parts such as fueller 1, electrical heating gasifier 2, flue gas heating and gasifying device 3, solenoid electric valve 4, blower fan 10, mixing chamber 6, air door 5, aerofoil 7 of burner, secondary aerofoil 8 and tertiary air hole 11, the inside and outside walls in combustion chamber.Fueller divides two-way to give the burner fuel feeding, and wherein a route pulse pump 16 (A) is given electrical heating gasifier 2 DFF Direct Fuel Feeds: the second tunnel then gives flue gas heating and gasifying device 3 fuel feeding by pulse pump 17 (B).Device relies on during cold start pulse pump A and electrical heating gasifier 2 to provide fuel after the gasification for burner fully, finish igniting and underload (less than specified peak load 20%) stable operation.When load is above greater than the big load of rated capacity 20%, mainly rely on flue gas heating and gasifying device 3 to realize the gasification of fuel.

The flow process that whole burner begins to start under the cold conditions situation is as follows: at first oil for fueller 1 by last oil pump 18, and start electrical heating gasifier 2; When treating that electrical heating gasifier 2 temperature rise to certain level (kerosene is generally 200 ℃, because of different these temperature values of fuel different), pulse pump A starts working, and the oiling gasification starts blower fan 10 then in electrical heating gasifier 2, and air door 5 apertures place initial value.Open magnetic valve 4, simultaneously electric igniter 14 is started working, till lighting and being detected by flame detector 15.Ignition trigger is finished since then.After treating that load rises to certain level, pulse pump B begins to 3 oilings of flue gas heating and gasifying device, and after this fuel feeding of stop pulse pump A carries out the transition to by flue gas heater vaporising fuel oil after a while.In whole burner normal work period, oil mass, air quantity and primary and secondary air proportioning are finished by control system by air door 5, to reach the highest efficiency of combustion and minimum disposal of pollutants (as flue dust and NOx, CO).When shutting down, at first stop pulse pump B, and close magnetic valve 4, blower fan keep work about one minute with cool burner.

Above-mentioned electrical heating gasifier adopts the metal can structure, and the bottom is provided with heating.Flue gas heating and gasifying device 3 is arranged in the air channel of being made up of combustion chamber inwall 13 and outer wall 12 (passageway), and it mainly relies on combustion chamber inwall 13 to come heating fuel oil (from pulse pump B) with heat radiation, heat exchange pattern.Magnetic valve 4 is generally normally closed, and energising is opened and guaranteed passing through of oil vapour.Air door 5 is in order to regulate the proportioning of first and second air quantity; When underrun, primary air ratio is less, increases with load.Mixing chamber 6 main effects are the outlet oil vapours and the even premix of hot-air that passes through air door 5 that make from magnetic valve 4, and are evenly distributed on the aerofoil 7 of whole burner.Even intensive layout aperture is less than the aperture of 1mm, to play the effect of the retention flame on aerofoil 7.Secondary aerofoil 8 replenishes necessary after-flame air for the combustion chamber.Blower fan 10 provides the burning required air for whole burner.This blower fan belongs to the speed-regulating type blower fan, realizes different air quantity by different rotating speeds, to adapt to the needs of burning.

The present invention compared with prior art, have the following advantages and beneficial effect: the present invention is for employing The structure that the gasification of electric heating gasification and flue gas organically combines, and be provided with one in the oil vapour exit Individual magnetic valve is controlled the break-make of oil vapour, thus this device not only to have a low-load combustion-stabilizing good and Strong regulating power, the efficiency of combustion height, smoke dust and peculiar smell when starting and put out a fire, thus reach high Imitate oligosaprobic purpose; But also can save electric energy, be easy to be extended and applied. For example on burner After heat exchanger (such as water heater) had been installed by the side, this burner can reach following technical indicator:

Minimum thermal load: 7kw

Maximum heating load: 42kw

Efficiency of combustion:＞99.5%

CO content in smoke:＜120ppm

NOx content:＜180ppm in the flue gas

Maximum electrical heating power consumption:＜600w during startup

Busy hour electrical heating power consumption:＜100w

Claims (4)

1. A gasification combustion device for burning light oil, which mainly includes an oil circuit system composed of an oil supply device (1), a pulse pump A, an electric heating gasifier (2) and oil pipes, and a fan, which is arranged on The primary air plate (7) below the combustion chamber, the secondary air plate (8), the mixing chamber (6), the air channel formed by the inner wall (13) and the outer wall (12) of the combustion chamber and the air duct arranged on the inner wall of the combustion chamber The tertiary air hole (11) is characterized in that another oil circuit is added between the oil supply device and the electric heating vaporizer. The oil circuit is composed of a pulse pump B and a flue gas heating vaporizer (3), and the flue gas is heated The outlet of the vaporizer (3) is connected with the electric heating vaporizer (2). 2. A gasification combustion device for burning light oil according to claim 1, characterized in that an electromagnetic control valve is provided on the oil pipe between the electrically heated gasifier (2) and the mixing chamber (6) (4). 3. A light oil gasification combustion device according to claim 1 or 2, characterized in that the flue gas heating gasifier (3) is arranged outside the inner wall of the combustion chamber. 4. A light oil gasification combustion device according to claim 3, characterized in that a damper (5) is provided at the outlet of the air duct to adjust the ratio of the primary air volume and the secondary air volume.

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