CN213237504U

CN213237504U - Burner using methanol fuel

Info

Publication number: CN213237504U
Application number: CN202021735630.0U
Authority: CN
Inventors: 李晓锦; 冯敏昌; 陈彪; 李峰华; 高率; 冯延兴; 雷姣姣
Original assignee: Fujian Dawei Energy Chemical Co ltd; Yulin Hydrocarbon Research Institute Co ltd
Current assignee: Fujian Dawei Energy Chemical Co ltd; Yulin Hydrocarbon Research Institute Co ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-05-18
Anticipated expiration: 2030-08-19

Abstract

The utility model relates to a combustor technical field specifically is an use methyl alcohol fuel combustor burner. The methanol fire grate burner solves the technical problems of easy fire-off and tempering, insufficient combustion, low combustion efficiency, low flame temperature, unclean discharge and the like of the existing methanol fire grate burner. The fire head comprises a fire head, wherein a fire hole which is uniform and has the same diameter and size is formed in the fire head area along the radial section, the outermost circle of the fire head is surrounded by the fire hole, and the fire holes in the central position are uniformly distributed; in addition, a secondary air distribution hole is designed in the central area of the fire head, the whole fire head is surrounded by the air collecting cover, and the secondary air distribution is carried out by ejecting gas fuel from the fire hole and ejecting air from a secondary air distribution hole of the air collecting cover. The utility model discloses a carry out many times air distribution to blowout gas fuel and mix, the burning of methyl alcohol fuel is very abundant, not only to improving combustion efficiency and reducing pollutant discharge in the flue gas positive meaning, the burning is very stable moreover.

Description

Burner using methanol fuel

Technical Field

The utility model relates to a combustor technical field specifically is an use methyl alcohol fuel combustor burner.

Background

Because the combustion characteristics of the methanol fuel are different from those of the traditional fuel (such as heat value, latent heat, ignition point, kinematic viscosity, surface tension, components, boiling point, atomization and gasification characteristics and the like), to popularize and apply the methanol fuel, a combustion device which is suitable for the combustion characteristics of the methanol fuel is required, and the existing industrial combustion device of fuel oil and gas cannot be simply used. For industrial burners using methanol fuel, no mature technology can be used for reference abroad, and because the methanol is not used as fuel in the aspect of foreign energy structure, the methanol fuel thermal combustion technology, particularly the methanol fuel injection type self-adaptive air distribution combustion technology and the methanol fuel two-phase self-atomization combustion technology are blank in foreign countries. Numerous medium and small enterprises in China strive to develop a methanol fuel burner technology, but the methanol fuel burner technology is basically improved from the technical level of spray combustion of fuel oil and gas burners, and the problems of insufficient combustion, low combustion efficiency, low flame temperature caused by insufficient combustion strength, unclean emission, poor practicability and the like exist, so that the methanol fuel thermal combustion device in China cannot be developed for many years.

At present, methanol fuel gasification burners, especially low-power methanol gasification burners, all adopt a fire grate burner used by natural gas to burn methanol fuel, and have the phenomena of flameout caused by fire escape and red damage caused by fire grate caused by tempering in the combustion process, and have unstable flame, insufficient combustion and discharge of pollutants such as formaldehyde; therefore, a methanol fuel gasification burner fire head is urgently needed, and the problems of insufficient combustion, low combustion efficiency, poor combustion stability, low flame temperature caused by insufficient combustion strength, unclean emission and the like can be effectively solved.

Disclosure of Invention

The utility model discloses a solve present methanol fuel combustor and have the burning insufficient, combustion efficiency is low, the flame temperature is low, discharge unclean scheduling problem, provide an use methanol fuel combustor burner.

The utility model discloses a realize through following technical scheme: a burner fire head using methanol fuel comprises a fire head, wherein a fire hole with uniform diameter and same size is formed in the fire head area along the radial section, the outermost circle of the fire head is surrounded by the fire hole, and the fire holes in the central position are uniformly distributed; in addition, a secondary air distribution hole is designed in the central area of the fire head, the whole fire head is surrounded by the air collecting cover, and the secondary air distribution is carried out by ejecting gas fuel from the fire hole and ejecting air from a secondary air distribution hole of the air collecting cover.

When the methanol fuel burner works, the gasified methanol fuel gas is ejected from the nozzle at a high speed, air is introduced from the primary air distribution port by negative pressure generated around high-speed airflow, the methanol gas fuel and the air are fully mixed in a mixing area at the throat part of the ejector, the premixed gas enters an ejector supercharging area and then is ejected from a fire hole to be burnt, and meanwhile, the negative pressure generated by flame ejected at a high speed can inject the air around to be mixed to form secondary air so that the secondary air is fully burnt. The fire head central zone is surrounded by peripheral flame, lead to the gaseous fuel of methanol blowout from the first middle part fire hole of burning to touch the air, for this reason, be provided with a plurality of overgrate air ventilation holes in the first middle part of burning, combustion-supporting air gets into the first central zone of fire from the secondary air distribution mouth, and the gaseous fuel of methanol and the abundant mixed combustion of air are very abundant, solve the easy fire of getting off, the tempering that exist of current methyl alcohol fire row combustor, the burning is insufficient, combustion efficiency is low, the flame temperature is low, discharge technical problem such as unclean.

The fire head is formed by a plurality of fire holes surrounding the secondary vent holes to form a combustion unit, a plurality of combustion units form the central area of the fire head, and the inlets of the vent holes are surrounded by a wind-collecting cover.

The fire head air collecting cover is arranged, and the secondary mixing degree of the mixed gas and the air can be changed by changing the length of the air collecting cover so as to achieve sufficient combustion.

The shape of the fire hole, the primary air distribution port and the secondary air distribution port can be round, rectangular or square, but is not limited to the above shapes.

The utility model has the advantages that: this structure combustor is wide to fuel gas's pressure variation accommodation, so after fuel pressure fluctuation, can not produce the fire and arrange the like of combustor and take off a fire, the tempering phenomenon, the burning is stable, methanol fuel gas carries out a air distribution earlier with the air and mixes after the nozzle blowout, spout the back again through the flame head and carry out the secondary air distribution with the air that the wind-collecting cover ventilation hole jetted and get into and mix, methanol fuel burning is very abundant, not only to improving combustion efficiency and reduce pollutant discharge in the flue gas positive meaning, and the burning is very stable moreover.

Drawings

FIG. 1 is a schematic view of a methanol fuel burner head structure of the present invention

FIG. 2 is a top view of a burner head structure of a methanol fuel burner

1. The device comprises a methanol fuel gas inlet 2, a methanol fuel nozzle 3, a primary air port injection hole 4, a mixing chamber 5, a pressurizing area 6, a secondary air vent hole 7, a fire hole 8, a fire head 9, an air collecting cover 10 and a mixing area.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

Embodiment 1

Fig. 1 is a schematic structural view of the burner head of the present invention using a methanol fuel burner. The embodiment uses a methanol fuel burner fire head 8, which comprises a fuel nozzle 1, a methanol fuel gas inlet 2, a methanol fuel nozzle 3, a primary air distribution port injection hole 4, a mixing chamber 5, a pressurizing area 6, a secondary air vent hole 7, a fire hole 9, an air collecting cover 10 and a mixing area. When the methanol fuel burner works, the gasified methanol fuel gas is ejected from the nozzle at a high speed, air is introduced from the primary air distribution port by negative pressure generated around high-speed airflow, the methanol gas fuel and the air are fully mixed in a mixing area at the throat part of the ejector, the premixed gas enters an ejector supercharging area and then is ejected from a fire hole to be burnt, and meanwhile, the negative pressure generated by flame ejected at a high speed can inject the air around to be mixed to form secondary air so that the secondary air is fully burnt. The central area of the fire head is surrounded by peripheral flame, so that the methanol gas fuel sprayed from the fire hole in the middle of the combustion head can not contact with air, and for this purpose, a plurality of secondary air vents are arranged in the middle of the combustion head, combustion-supporting air enters the central area of the fire head from a secondary air distribution port, and the methanol gas fuel and the air are sufficiently mixed and combusted

Embodiment 2

The shape of the fire hole 7, the primary air inlet injection hole 3 and the secondary air vent hole 6 can be circular, rectangular or square, but is not limited to the above shape.

Embodiment 3

The fire holes 7 are uniformly distributed around the secondary air vent holes 6.

Embodiment 4

The number of the primary air port injection holes 3 can be one, two or three, but is not limited to the above number.

Embodiment 5

The air collecting cover 9 collects air and performs secondary air injection.

Embodiment 6

The fire head 8 can be ignited by electricity, automatically or manually.

Embodiment 7

The methanol fuel used by the fire head 8 can be gasified by electric heating, and can also be heated by a flame waste heat coil, but is not limited to the above heating mode.

The utility model discloses a methanol fuel combustor burner can extensively be used for small-size water heater, steam generator, hot-blast furnace, domestic cooking utensils etc.. In summary, the preferred embodiments of the present invention are only described, but the scope of the present invention is not limited thereto, and any changes that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope of the present invention.

Claims

1. A burner fire head using methanol fuel is characterized in that the burner fire head using methanol fuel comprises a fire head, wherein a fire hole which is uniform and has the same diameter is formed in the area of the fire head along the radial section, the outermost circle of the fire head is surrounded by the fire hole, and the fire holes in the central position are uniformly distributed; in addition, a secondary air distribution hole is designed in the central area of the fire head, the whole fire head is surrounded by the air collecting cover, and the secondary air distribution is carried out by ejecting gas fuel from the fire hole and ejecting air from a secondary air distribution hole of the air collecting cover.

2. The burner fire head of the methanol fuel burner as claimed in claim 1, wherein when the methanol fuel burner is operated, the gasified methanol fuel gas is ejected from the nozzle at a high speed, negative pressure generated around the high-speed airflow introduces air from the primary air distribution port, the methanol fuel gas and the air are fully mixed in a mixing area at the throat of the ejector, premixed gas enters a pressurizing area of the ejector and then is ejected from the fire hole to be ignited for burning, and meanwhile negative pressure generated by flame ejected at a high speed can inject surrounding air to be mixed in to form secondary air so as to enable the secondary air to be fully burned.

3. A burner tip for a methanol fuel burner as in claim 1, wherein the burner tip is a burner unit comprising a plurality of burner ports surrounding the secondary air vent, the plurality of burner units comprising a central region of the burner tip, the inlets of the plurality of burner ports being surrounded by a hood.

4. A burner tip for a methanol fuel burner as in claim 1, wherein the burner tip air-collecting hood is configured to vary the length of the hood to vary the degree of secondary mixing of the mixture with air to achieve complete combustion.

5. A burner tip for a methanol fuel burner as set forth in claim 1, wherein said burner holes and said primary and secondary air distribution ports are circular, rectangular or square in shape.

6. A burner tip for a methanol fuel burner as in claim 1, wherein the air collection hood is configured to collect air for secondary air injection.

7. A burner tip for a methanol fuel burner as in claim 1, wherein the burner tip is adapted to be electrically ignited, automatically ignited, or manually ignited.

8. A burner head for a burner using methanol fuel as claimed in claim 1, wherein the methanol fuel for the burner head can be heated by electric heating gasification or flame waste heat coil.