CN203068494U - Air distribution structure for improving combustion efficiency of oil-fired steam-injection boiler - Google Patents
Air distribution structure for improving combustion efficiency of oil-fired steam-injection boiler Download PDFInfo
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- CN203068494U CN203068494U CN 201320043162 CN201320043162U CN203068494U CN 203068494 U CN203068494 U CN 203068494U CN 201320043162 CN201320043162 CN 201320043162 CN 201320043162 U CN201320043162 U CN 201320043162U CN 203068494 U CN203068494 U CN 203068494U
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Abstract
The utility model discloses an air distribution structure for improving the combustion efficiency of an oil-fired steam-injection boiler. The air distribution structure comprises a steam-air heat exchanger arranged at the upper part of a radiation section, wherein the outer pipe of the steam-air heat exchanger is connected with an air guide pipeline and a hot air distributor inlet pipeline; the inner pipe of the steam-air heat exchanger is connected with a steam inducing pipeline and a return water pipeline; the steam inducing pipeline is connected with a steam sampling separator; the return water pipeline is connected with a plunger pump; the air inducing pipeline is connected with the outlet of a fan; the hot air distributor inlet pipeline is connected with the inlet of a hot air distributor; and the outlets of the air distributor are connected with the tail part of the radiation section by second-stage air distribution pipelines. The method comprises the following steps that: second-stage distributed air after being pressurized by the fan is heated in the steam-air heat exchanger and then divided into three ways by the hot air distributor; and the three ways of hot air with the same flow are injected into the tail part of the radiation section in a tangential circle air supply manner. The second-stage distributed air can be used for increasing the oxygen content at the tail part of the radiation section and further accelerating oil combustion; meanwhile whirlwind is formed to separate silt from flue gas, so that the concentration of fly ash in the flue gas of a downstream convection section is reduced, and the ash deposit of a convection bank is reduced.
Description
Technical field
The utility model relates to the fuel oil steam injection boiler technical field, is specifically related to a kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion.
Background technology
Injection boiler is the visual plant of heavy crude producing, and boiler injects oil well with the HTHP saturated vapor that produces, and the viscous crude temperature is raise, and viscosity reduces, and is easy to exploitation.Injection boiler is made up of radiant section, changeover portion, convection section, water-water heat exchanger and connecting line.Injection boiler is made fuel with fuel oil, but considers from economic aspect, selects for use heavy oil as main fuel usually.Heavy oil is last remaining low volatility product in the petroleum refining process, and the high molecular hydrocarbon proportion of higher boiling is very big, and impurity such as the silt in the crude oil are most of or all be trapped in the heavy oil, the furol viscosity height, volatility is low, burning difficulty, and very difficult after-flame.Contain more gum asphalt in the heavy oil, heavy oil atomizing difficulty increases, use traditional oil burner, all air all mix with heavy oil, can cause oxygen content wretched insufficiency in the radiant section flame afterbody place air, and heavy oil is difficult to sufficient combustion, can produce a large amount of cotton-shaped burnt shell class flue dust, owing to lack oxygen, pyrolysis of hydrocarbons produces carbon black particle in the heavy oil steam, produces carbon black class flue dust.Heavy oil is difficult to the combustion burning fully, efficiency of combustion is low, cause the energy of heavy oil to utilize limited, capacity usage ratio is low, does not meet the requirement of national energy-saving and emission-reduction, and contains a large amount of burnt shell class dusts, carbon black, plaster in the flue gas behind the heavy oil combustion, behind the long-play, serious caking property dust stratification appears in the convection bank meeting, has a strong impact on the convection section heat-transfer effect, reduces the injection boiler thermal efficiency.
Summary of the invention
For addressing the above problem, the utility model provides a kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion, second level air distribution can be sprayed into the horizontal radiant section afterbody of injection boiler 1/4 place in circle of contact mode by the utility model air distribution structure, increase the oxygen content in the radiant section tail air, promote the burning of fuel oil, reduce the generation of carbon black, the burnt shell class dust that generates in the combustion process is burnt again, be beneficial to the abundant burning of fuel oil, improve the injection boiler efficiency of combustion; Second level air distribution sprays into radiant section and can produce whirlwind simultaneously, and flue gas is rotatablely moved, and the grains of sand in the flue gas, plaster are separated because quality is rotated greatly, are deposited on the radiant section bottom.Adopt this air distribution structure and air distribution method, greatly improve boiler combustion efficiency, reduced the concentration of burnt shell class dust, carbon black particle in the flue gas, and form whirlwind at the radiant section afterbody, the bulky grain plaster is separated from flue gas, effectively reduced slagging scorification, the dust stratification of convection bank.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion, steam-the air heat exchanger 4 that comprises the top that is arranged in injection boiler radiant section 17, described steam-air heat exchanger 4 is double pipe heat exchanger, its outer tube connects induced pipe 3 and hot-air distributor inlet ductwork 5, pipe connects and draws steam pipework 1 and water return pipeline 2 in it, the described steam pipework 1 that draws connects injection boiler steam sampling separator 14, water return pipeline 2 connects injection boiler plunger displacement pump 15, induced pipe 3 connects 16 outlets of injection boiler blower fan, hot-air distributor inlet ductwork 5 connects the entrance of hot-air distributor 6, three outlets of air distributor 6 are connected by radiant section 17 afterbodys of three tunnel second level air distribution pipelines 7 and injection boiler, described induced pipe 3 is provided with air flow rate adjustment valve 9, the described steam pipework 1 that draws is provided with steam flow control valve 10, is provided with second level air distribution control valve 8 at described three tunnel second level air distribution pipelines 7.
The end of described each second level air distribution pipeline 7 is connected with spout 13, three spouts 13 of three second level air distribution pipelines 7 are positioned on the radiant section 17 same circular vertical sections, on circular vertical section every 120 ° of layouts, one of them spout is positioned at the top in vertical section, described vertical section is positioned at radiant section afterbody 1/4 place, and described spout 13 is the convergent spout.
Described spout 13 length are 100mm, and terminal external diameter is 40mm, and wall thickness is 5mm.
Also comprise and be close to the inboard dust block board 12 that arranges of radiant section 17 radiation pipeloops.
Described dust block board 12 is that thickness is the annular heat-insulation layer of 40mm, and its width is 300mm.
Described hot-air distributor 6 is that external diameter is that 400mm, thickness of the shell are the spherical shell of 12mm, and an entrance and three outlets are distributed on the horizontal axial plane at centre of sphere place.
It is the 20G carbon steel pipe of 60 ~ 70mm that the interior pipe of described steam-air heat exchanger 4 adopts external diameter, it is the 20G carbon steel pipe of 110 ~ 120mm that outer tube adopts external diameter, described water return pipeline 2 is the 20G carbon steel pipe of 60 ~ 70mm with drawing steam pipework 1 employing external diameter, and it is the 20G carbon steel pipe of 60 ~ 70mm that described induced pipe 3 and hot-air distributor inlet ductwork 5 adopt external diameters.
The air distribution method of the air distribution structure of raising fuel oil steam injection boiler efficiency of combustion described above, getting the boiler excess air coefficient is 1.17, in the air after 16 pressurizations of injection boiler blower fan, adjusting by air flow rate adjustment valve 9 amount for the air of α B as first order air distribution, directly feeding injection boiler burner 18 mixes with atomized fuel, remain the air of 0.17 α B as second level air distribution, wherein α is the theoretical air requirement of every kilogram of fuel oil, and B is Fuel Consumption; Second level air distribution is by the outer tube of induced pipe 3 introducing steam-air heat exchangers 4, and air mass flow is adjusted by the air flow rate adjustment valve 9 that is installed on the induced pipe 3; Simultaneously, the steam that adds hot-air comes from steam sampling separator 14, introduce the interior pipe of steam-air heat exchanger 4 for heating second level air distribution by drawing steam pipework 1, steam flow is regulated by being installed in the steam flow control valve 10 that draws on the steam pipework 1, second level air distribution heats the back and is divided into three the tunnel by hot-air distributor 6 in steam-air heat exchanger 4, three spouts 13 of three tunnel second level air distributions by three second level air distribution pipelines 7 spray into radiant section 17 afterbodys of injection boiler in circle of contact mode, and three tunnel second level air distribution flows are adjusted by the second level air distribution control valve 8 that is installed on the second level air distribution pipeline 7.
Under the normal operation, make three tunnel second level air distribution flows identical by adjusting second level air distribution control valve 8, guarantee the circle of contact center of circle and radiant section dead in line; Simultaneously, the second level air distribution unsteady flow amount pulse adjustment of carrying out 9 minutes every 4 hours is operated, the second level air distribution control valve of namely regulating on the air distribution pipeline of the second level 8 increases first via air mass flow, then the second the road and the Third Road air mass flow reduce, and regulate second level air distribution control valve 8 and guarantee that the second the tunnel is identical with the Third Road flow, operation is 3 minutes under this state; Next regulate second level air distribution control valve 8 the second tunnel air mass flow is increased, the first via and Third Road air mass flow reduce, but flow is identical, moves 3 minutes; The Third Road air mass flow is increased, and the first via and the second road flow reduce, but flow is identical, moves 3 minutes.
Described second level air distribution control valve 8 adopts electric control valve.
Described water return pipeline 2 is introduced injection boiler plunger displacement pump 15 with the condensed water that the steam condensation produces, as boiler feedwater.
The utility model adopts the two-stage air distribution, and second level air distribution heating back is sprayed into the radiant section afterbody in circle of contact mode, improve the burning of fuel oil, the oxygen content of Enhanced Radiation Reduced Blast segment trailer flue gas, promote the abundant burning of fuel oil, reduce the generation of carbon black particle and burnt shell class dust, more effectively utilize the energy of fuel oil, greatly improve the efficiency of combustion of injection boiler, meet the developing direction of national energy-saving and emission-reduction.The raising of efficiency of combustion, the burnt shell class dust that fully produces because of the fuel oil unburned in the flue gas, the concentration of carbon black particle are greatly reduced, and second level air distribution sprays into radiant section in circle of contact mode, form whirlwind at the radiant section afterbody, oarse-grained plaster in the flue gas can be separated, greatly reduce the concentration of dust in the convection section flue gas, effectively reduced slagging scorification, the dust stratification of convection bank, improved the thermal efficiency of injection boiler.
Description of drawings
Fig. 1 is the flow chart of having used the injection boiler of a kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion of the utility model and air distribution mode.
Fig. 2 is the vertical view of having used the injection boiler of a kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion of the utility model and air distribution mode.
Steam-air heat exchanger structure chart in the air distribution structure that Fig. 3 improves the fuel oil steam injection boiler efficiency of combustion for the utility model is a kind of and the air distribution mode.
Hot-air distributor front view in the air distribution structure that Fig. 4 improves the fuel oil steam injection boiler efficiency of combustion for the utility model is a kind of and the air distribution mode.
Hot-air distributor vertical view in the air distribution structure that Fig. 5 improves the fuel oil steam injection boiler efficiency of combustion for the utility model is a kind of and the air distribution mode.
Spout is arranged and the desirable circle of contact location drawing in the air distribution structure that Fig. 6 improves the fuel oil steam injection boiler efficiency of combustion for the utility model is a kind of and the air distribution mode.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model structure is elaborated.
As depicted in figs. 1 and 2, a kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion of the utility model, comprise the steam-air heat exchanger 4 that is arranged in injection boiler radiant section 17 tops, described steam-air heat exchanger 4 is double pipe heat exchanger, its outer tube connects induced pipe 3 and hot-air distributor inlet ductwork 5, pipe connects and draws steam pipework 1 and water return pipeline 2 in it, the described steam pipework 1 that draws connects injection boiler steam sampling separator 14, water return pipeline 2 connects injection boiler plunger displacement pump 15, induced pipe 3 connects 16 outlets of injection boiler blower fan, hot-air distributor inlet ductwork 5 connects the entrance of hot-air distributor 6, three outlets of air distributor 6 are connected by radiant section 17 afterbodys of three tunnel second level air distribution pipelines 7 and injection boiler, described induced pipe 3 is provided with air flow rate adjustment valve 9, the described steam pipework 1 that draws is provided with steam flow control valve 10, is provided with second level air distribution control valve 8 at described three tunnel second level air distribution pipelines 7.
Draw steam pipework 1 entrance and connect injection boiler steam sampling separator 14, boiler terminal steam is introduced steam-air heat exchanger 4 for heating second level air distribution by drawing steam pipework 1, steam flow is regulated by being installed in the steam flow control valve 10 that draws on the steam pipework 1, steam is the condensed water after the heat release in steam-air heat exchanger, salt content is few, water quality is good, meet the feedwater requirement of injection boiler, it is introduced injection boiler plunger displacement pumps 15 as the injection boiler feedwater by water return pipeline 2, draw steam pipework 1 and water return pipeline 2 used 20G carbon steel pipes on size and material all with steam-air heat exchanger 4 in manage consistent.Induced pipe 3 entrances are in the outlet of injection boiler blower fan, and with the outer tube of the second level air distribution introducing steam-air heat exchanger 4 after the blower fan pressurization, the flow of second level air distribution is regulated by the air flow rate adjustment valve that interpolation is set 9 on the induced pipe.
As shown in Figure 3, steam-air heat exchanger 4 is a kind of double pipe heat exchangers, adopt six return structures, for reducing the radiation loss of steam-air heat exchanger 4, the logical steam of interior pipe, it is the 20G carbon steel pipe of 60 ~ 70mm that outer tube blowing air, interior pipe are selected external diameter for use, and it is the 20G carbon steel pipe of 110 ~ 120mm that outer tube is selected external diameter for use.Steam-air heat exchanger 4 is arranged in the top of injection boiler radiant section 17, is fixed on the radiant section 17 by bracing frame 11.
As shown in Figure 4 and Figure 5, hot-air distributor 6 is that external diameter is that 400mm, thickness of the shell are the spherical shell of 12mm, and hot-air distributor 6 has an entrance, three outlets, four port arrangements are arranged a port every 90 ° on the horizontal axial plane at hot-air distributor 6 centre of sphere places.Arrival end connects hot-air distributor entrance pipe 5, each port of export is connected with second level air distribution pipeline 7, second level air distribution after the hot-air distributor will heat is divided into three the tunnel, and the flow on every road is adjusted by the second level air distribution control valve 8 that is installed on the air distribution pipeline of the second level.Second level air distribution pipeline 7 uses external diameter to be the 20G carbon steel pipe of 60mm, second level air distribution pipeline is introduced the boiler radiant section with three tunnel second level air distributions, for the flow of guaranteeing three transportation work styles under the normal operation identical, install second level air distribution control valve 8 additional on each second level air distribution pipeline, second level air distribution control valve adopts electric control valve.
As shown in Figure 6, three second level air distribution pipeline 7 ends all connect 13, three spouts 13 of spout and are positioned on same radiant section 17 vertical sections, arrange a spout every 120 ° on circular vertical section, one of them spout is positioned at the top in vertical section, and the vertical section is positioned at radiant section afterbody 1/4 place; Spout is the convergent spout, and spout is long to be 100mm, and terminal external diameter is 40mm, and wall thickness is 5mm.Three tunnel second level air distributions accelerate the back by spout 13 and spray into radiant section 17 in circle of contact mode, and desirable tangential circle diameter is 1/10 of radiant section outer diameter, the desirable circle of contact center of circle and radiant section dead in line.Dust block board 12 is arranged in second level air distribution towards the wall place, and dust block board is that thickness is the annular heat-insulation layer of 40mm, is close to radiation pipeloop inboard, and width is 300mm.
As shown in Figure 1, the utility model improves the air distribution method of the air distribution structure of fuel oil steam injection boiler efficiency of combustion, getting the boiler excess air coefficient is 1.17, in the air after 16 pressurizations of injection boiler blower fan, adjusting by air flow rate adjustment valve 9 amount for the air of α B as first order air distribution, directly feeding injection boiler burner 18 mixes with atomized fuel, remains the air of 0.17 α B as second level air distribution, wherein α is the theoretical air requirement of every kilogram of fuel oil, and B is Fuel Consumption.Second level air distribution is introduced the outer tube of steam-air heat exchanger 4 by induced pipe 3; Simultaneously, the steam that adds hot-air comes from steam sampling separator 14, introduce the interior pipe of steam-air heat exchanger 4 for heating second level air distribution by drawing steam pipework 1, steam flow is regulated by being installed in the steam flow control valve 10 that draws on the steam pipework 1, second level air distribution heats the back and is divided into three the tunnel by hot-air distributor 6 in steam-air heat exchanger 4, as shown in Figure 6, three tunnel second level air distributions are introduced radiant section 17 by three second level air distribution pipelines 7, sprayed into radiant section 17 afterbodys of injection boiler in circle of contact mode by terminal three spouts 13 that connect of second level air distribution pipeline, second level air distribution flow is adjusted by the second level air distribution control valve 8 that is installed on the second level air distribution pipeline 7, guarantees the desirable circle of contact center of circle and radiant section dead in line.
Injection boiler adopts the two-stage air distribution mode, can effectively improve the burning condition of radiant section, is beneficial to fuel oil and fully burns, and improves the efficiency of combustion of injection boiler, reduces the concentration of flying dust in the flue gas simultaneously.First order air distribution is to be that the air of α B directly feeds injection boiler burner 18 and mixes with atomized fuel with flow, enter the radiant section 17 of injection boiler then, this moment, radiant section 17 porch air capacities were less, and the fuel air mixture temperature is higher, and fuel concentration is higher, is beneficial to and catches fire; Second level air distribution is to be after the air of 0.17 α B heats in steam-air heat exchanger 4 with flow, be divided into three the tunnel by hot-air distributor 6, introduce horizontal radiant section by second level air distribution pipeline 7 again, by spout 13 it is sprayed into the radiant section afterbody in circle of contact mode, remedy the shortcoming of oxygen content deficiency in the radiant section tail air, and because what spray into is the rapid reduction that hot-air prevents radiant section afterbody cigarette temperature, guarantee proceeding of burning.The feeding of second level air distribution, increased the oxygen content of radiant section tail flue gas, reduce the generation of carbon black particle, the burnt shell class dust of generation is rekindled, take full advantage of the energy of fuel oil, improve the boiler oil utilization rate, effectively reduce the concentration of not firing composition in the flue gas, greatly improve the efficiency of combustion of injection boiler.Second level air distribution produces whirlwind at radiant section 17 afterbodys, has the effect of cyclonic separation, and the bulky grain grains of sand, plaster in the flue gas can be separated from flue gas.Because second level air distribution is higher by spout 13 acceleration wind speed; for preventing that second level air distribution is towards wall; cause the wearing and tearing of boiler radiation pipeloop, slagging scorification; add dust block board 12 towards the wall place at second level air distribution; dust block board 12 is the annular heat-insulation layer of 40mm for thickness, is close to radiation pipeloop inboard, and the dust block board width is 300mm; the isolated bulky grain silt of circle of contact air distribution, plaster are deposited on the dust block board 12, effectively protect the radiation pipeloop.Under the normal operation, make three tunnel second level air distribution flows identical by adjusting second level air distribution control valve 8, guarantee the circle of contact center of circle and radiant section dead in line.Simultaneously, the second level air distribution unsteady flow amount pulse adjustment of carrying out 9 minutes every 4 hours is operated, the second level air distribution control valve of namely regulating on the air distribution pipeline of the second level 8 makes first via air mass flow, because the total amount of second level air distribution is identical, first via flow increases must cause other two-way air mass flow minimizing, and regulate that second level air distribution control valve 8 guarantees the second the tunnel, the Third Road flow is identical, operation is 3 minutes under this state; Regulate second level air distribution control valve 8 then the second road flow is increased, first and third tunnel air mass flow reduces, but flow is identical, and operation is 3 minutes under this state; The Third Road flow is increased, and first and second road flow reduces, but flow is identical, and operation is 3 minutes under this state.The effect of unsteady flow amount operation is again the oxygen content of Enhanced Radiation Reduced Blast section 17 afterbody parts, be more conducive to the abundant burning of fuel oil, play the purpose of purging simultaneously, purge the dust stratification that is deposited on the dust block board 12, make it drop on radiant section 17 bottoms, prevent that dust stratification is too much on the dust block board 12.Adopt the two-stage air distribution, and second level air distribution heating back is sprayed into radiant section 17 afterbodys in circle of contact mode, improve the burning of fuel oil, the oxygen content of Enhanced Radiation Reduced Blast section 17 tail flue gas, promote the abundant burning of fuel oil, reduce the generation of carbon black particle and burnt shell class dust, more effectively utilize the energy of fuel oil, greatly improve the efficiency of combustion of injection boiler, meet the developing direction of national energy-saving and emission-reduction.The raising of efficiency of combustion, the burnt shell class dust that fully produces because of the fuel oil unburned in the flue gas, the concentration of carbon black particle are greatly reduced, and second level air distribution sprays into radiant section in circle of contact mode, form whirlwind at the radiant section afterbody, oarse-grained plaster in the flue gas can be separated, greatly reduce the concentration of dust in the convection section flue gas, effectively reduced slagging scorification, the dust stratification of convection bank, improved the thermal efficiency of injection boiler.
Claims (7)
1. air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion, it is characterized in that: the steam-air heat exchanger (4) that comprises the top that is arranged in injection boiler radiant section (17), described steam-air heat exchanger (4) is double pipe heat exchanger, its outer tube connects induced pipe (3) and hot-air distributor inlet ductwork (5), pipe connects and draws steam pipework (1) and water return pipeline (2) in it, the described steam pipework (1) that draws connects injection boiler steam sampling separator (14), water return pipeline (2) connects injection boiler plunger displacement pump (15), induced pipe (3) connects injection boiler blower fan (16) outlet, hot-air distributor inlet ductwork (5) connects the entrance of hot-air distributor (6), three outlets of air distributor (6) are connected by radiant section (17) afterbody of three tunnel second level air distribution pipelines (7) and injection boiler, described induced pipe (3) is provided with air flow rate adjustment valve (9), the described steam pipework (1) that draws is provided with steam flow control valve (10), is provided with second level air distribution control valve (8) at described three tunnel second level air distribution pipelines (7).
2. a kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion according to claim 1, it is characterized in that: the end of described each second level air distribution pipeline (7) is connected with spout (13), three spouts (13) of three second level air distribution pipelines (7) are positioned on the same circular vertical section of radiant section (17), on circular vertical section every 120 ° of layouts, one of them spout is positioned at the top in vertical section, described vertical section is positioned at radiant section afterbody 1/4 place, and described spout (13) is the convergent spout.
3. a kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion according to claim 2 is characterized in that: described spout (13) is long to be 100mm, and terminal external diameter is 40mm, and wall thickness is 5mm.
4. a kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion according to claim 1 is characterized in that: also comprise and be close to the inboard dust block board (12) that arranges of radiant section (17) radiation pipeloop.
5. a kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion according to claim 4, it is characterized in that: described dust block board (12) is that thickness is the annular heat-insulation layer of 40mm, and its width is 300mm.
6. a kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion according to claim 1, it is characterized in that: described hot-air distributor (6) is that external diameter is that 400mm, thickness of the shell are the spherical shell of 12mm, and an entrance and three outlets are distributed on the horizontal axial plane at centre of sphere place.
7. a kind of air distribution structure that improves the fuel oil steam injection boiler efficiency of combustion according to claim 1, it is characterized in that: it is the 20G carbon steel pipe of 60 ~ 70mm that the interior pipe of described steam-air heat exchanger (4) adopts external diameter, it is the 20G carbon steel pipe of 110 ~ 120mm that outer tube adopts external diameter, described water return pipeline (2) and draw steam pipework (1) to adopt external diameter be the 20G carbon steel pipe of 60 ~ 70mm, described induced pipe (3) and hot-air distributor inlet ductwork (5) employing external diameter are the 20G carbon steel pipe of 60 ~ 70mm.
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| CN 201320043162 CN203068494U (en) | 2013-01-25 | 2013-01-25 | Air distribution structure for improving combustion efficiency of oil-fired steam-injection boiler |
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| CN 201320043162 CN203068494U (en) | 2013-01-25 | 2013-01-25 | Air distribution structure for improving combustion efficiency of oil-fired steam-injection boiler |
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| CN203068494U true CN203068494U (en) | 2013-07-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090370A (en) * | 2013-01-25 | 2013-05-08 | 西安交通大学 | Air distribution structure for improving combustion efficiency of fuel oil steam injection boiler and air distribution method |
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2013
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090370A (en) * | 2013-01-25 | 2013-05-08 | 西安交通大学 | Air distribution structure for improving combustion efficiency of fuel oil steam injection boiler and air distribution method |
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Granted publication date: 20130717 Effective date of abandoning: 20150225 |
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