CN111197742A - Reversing device for heat accumulating type combustion and reversing method thereof - Google Patents
Reversing device for heat accumulating type combustion and reversing method thereof Download PDFInfo
- Publication number
- CN111197742A CN111197742A CN202010051556.9A CN202010051556A CN111197742A CN 111197742 A CN111197742 A CN 111197742A CN 202010051556 A CN202010051556 A CN 202010051556A CN 111197742 A CN111197742 A CN 111197742A
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- valve
- ejector
- smoke
- cut
- air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/82—Preventing flashback or blowback
- F23D14/825—Preventing flashback or blowback using valves
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a reversing device for heat accumulating type combustion and a reversing method thereof, wherein the reversing device for heat accumulating type combustion comprises a stop valve arranged on a left ejector and a right ejector, the stop valve is a first stop valve arranged between the left ejector and the right ejector, or a second stop valve arranged on the top of the left ejector and a third stop valve arranged on the top of the right ejector; the ejector comprises a mixing pipe and a smoke negative pressure chamber which are vertically connected, an air nozzle is installed in the mixing pipe, the bottom of the air nozzle is connected with a loop flange, and the smoke negative pressure chamber is matched with the air flange and the smoke flange of the heat accumulating type combustor. Through the mode, the reversing of air/smoke can be realized, the safety and the stability are realized, even the sealing performance of the stop valve is poor, the air/smoke cross phenomenon does not exist, the air supply and the smoke discharge can be realized only by the blower, the installation is convenient, and the structure is simple.
Description
Technical Field
The invention relates to the technical field of heat accumulating type air combustion, in particular to a reversing device for heat accumulating type combustion and a reversing method thereof.
Background
The heat accumulating type burners mainly using gas fuel have various forms, the working characteristics and the principle are similar, and the heat accumulating type burners are installed in pairs or groups, one group burns, and the other group discharges smoke. When the burner is in operation, fuel, air and flue gas are reversed after a certain time, one or a group of burners which are originally burnt are reversed into flue gas, and the other or a group of burners are reversed into burning. The heat in the flue gas is absorbed by the heat accumulator through continuous cycle work, and then is conducted to the air after reversing. The fuel is generally supplied by an independent spray gun or an independent channel, the air is supplied by an air blower, the air and the flue gas exchange heat in the heat storage chamber, and then the low-temperature flue gas is extracted by an induced draft fan. The high-temperature air heated by the heat accumulator is sprayed out from the heat accumulator channel, the fuel gas is sprayed out from the spray gun or the channel, and the high-temperature air and the fuel are mixed in the furnace or at the burner nozzle to carry out diffusion combustion. By the combustion method, most of heat in the flue gas can be reused, and fuel saving is facilitated.
At present, the reversing of the heat accumulating type combustion technology is realized by adopting a single valve, namely a three-way reversing valve or a four-way reversing valve, the structure is complex, the later-period maintenance is not facilitated, and in the reversing gap, the cavities are communicated, and the air/smoke gas cross-ventilation phenomenon is caused by the condition that positive air pressure and negative smoke gas pressure meet. Moreover, air needs to be supplied by a blower, smoke exhaust needs to be extracted by an induced draft fan, and equipment redundancy is caused in the case of single installation or small space.
Disclosure of Invention
The invention mainly solves the technical problems that: aiming at the defects of the prior art, the reversing device and the reversing method for the heat accumulating type combustion can realize the reversing of air/smoke, are safe and stable, have no air/smoke gas mixing phenomenon even if the sealing performance of the stop valve is poor, can realize the air supply and the smoke gas discharge only by an air blower, and have convenient installation and simple structure.
In order to solve the technical problems, the invention adopts a technical scheme that: the reversing device for the regenerative combustion comprises shut-off valves arranged on a left injector and a right injector, wherein the shut-off valves are first shut-off valves arranged between the left injector and the right injector, or a second shut-off valve arranged on the top of the left injector and a third shut-off valve arranged on the top of the right injector; the ejector comprises a mixing pipe and a smoke negative pressure chamber which are vertically connected, an air nozzle is installed in the mixing pipe, the bottom of the air nozzle is connected with a loop flange, and the smoke negative pressure chamber is matched with the air flange and the smoke flange of the heat accumulating type combustor.
In a preferred embodiment of the invention, the first shut-off valve is a pneumatic tandem gate shut-off valve.
In a preferred embodiment of the invention, the pneumatic tandem flashboard cut-off valve is arranged above air spray heads in the left ejector and the right ejector.
In a preferred embodiment of the invention, the second stop valve and the third stop valve are symmetrically arranged at the tops of the mixing pipes of the left injector and the right injector respectively.
In a preferred embodiment of the invention, the lap-flange is connected to an external blower.
In a preferred embodiment of the present invention, the mixing tube comprises: last loudspeaker section, straight tube section and the lower loudspeaker section of down constituteing in proper order from the top, air shower nozzle installs loudspeaker section down, flue gas negative pressure chamber with loudspeaker section is perpendicular just integrative setting down.
In a preferred embodiment of the present invention, the first cut-off valve is installed in straight pipe sections of the left and right injectors.
The reversing method of the reversing device for the regenerative combustion comprises the following steps:
(100) the left side of the first cut-off valve is opened/the valve of the second cut-off valve is opened, and the right side of the first cut-off valve is closed/the valve of the third cut-off valve is closed; at the moment, the air nozzle in the left ejector sprays air, negative pressure is generated in the mixing pipe of the left ejector, the smoke negative pressure chamber of the left ejector sucks smoke from the heat accumulating type combustor, and the smoke is discharged from the top of the mixing pipe of the left ejector; the air nozzle in the right side ejector sprays air, and the air enters the heat accumulating type combustor from the smoke negative pressure chamber of the right side ejector to support combustion due to the closing of the right side of the first cut-off valve/the closing of the valve of the third cut-off valve;
(200) the right side of the first cut-off valve is opened/the valve of the third cut-off valve is opened, and the left side of the first cut-off valve is closed/the valve of the second cut-off valve is closed; at the moment, the air nozzle in the left side ejector sprays air, and the air enters the heat accumulating type combustor for supporting combustion from the smoke negative pressure chamber of the left side ejector due to the left side closing of the first cut-off valve/the closing of the valve of the second cut-off valve; an air nozzle in the right ejector sprays air, negative pressure is generated in a mixing pipe of the right ejector, a smoke negative pressure chamber of the right ejector sucks smoke from the heat accumulating type combustor, and the smoke is discharged from the top of the mixing pipe of the right ejector;
(300) and (5) repeating the steps (100) and (200).
The invention has the beneficial effects that: through set up a pneumatic pair picture peg trip valve between two sprayers, perhaps set up independent trip valve on two sprayers alone, can realize the switching-over of air/flue gas, the safety and stability, even the leakproofness of trip valve is not good, does not have the gas phenomenon of mixing of air/flue gas yet, only needs the air-blower just can realize the supply of air and the discharge of flue gas, and simple to operate, simple structure.
Drawings
Fig. 1A is a schematic structural view of a first embodiment of a reversing device for regenerative combustion according to the present invention;
FIG. 1B is a schematic structural view of a second embodiment of a reversing device for regenerative combustion according to the present invention;
FIG. 2 is a schematic diagram of the injector shown in FIG. 1A;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a cross-sectional view C-C shown in FIG. 3;
FIG. 5(1) is a schematic diagram of step (100) in the commutation method of the commutation apparatus shown in FIG. 1A;
FIG. 5(2) is a schematic diagram of step (200) in the commutation method of the commutation apparatus shown in FIG. 1A;
FIG. 6(1) is a schematic diagram of step (100) in the commutation method of the commutation apparatus shown in FIG. 1B;
FIG. 6(2) is a schematic diagram of step (200) in the commutation method of the commutation apparatus shown in FIG. 1B;
the parts in the drawings are numbered as follows: 1. the device comprises a first cut-off valve, a second cut-off valve, a left side ejector, a mixing pipe, a first cut-off valve, a second cut-off valve, a left side ejector, a first cut-off valve, a second cut-off valve.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1A-6 (2), the embodiment of the present invention includes:
example one
A reversing device for heat accumulating type combustion is shown in figure 1A and comprises a stop valve arranged on a left injector and a right injector, wherein the stop valve is a first stop valve 1 arranged between the left injector and the right injector; the first cut-off valve 1 is a pneumatic duplex flashboard cut-off valve; the reversing of air/flue gas can be realized, the safety and the stability are realized, and even if the sealing performance of the cut-off valve is poor, the air/flue gas mixing phenomenon does not exist.
As shown in fig. 2-4, the left injector 4 includes a mixing pipe 41 and a smoke negative pressure chamber 43 which are vertically connected, an air nozzle 42 is installed in the mixing pipe 41, a loop flange 44 is connected to the bottom of the air nozzle 42, and the smoke negative pressure chamber 43 is matched with the air and smoke flanges of the regenerative burner; the mixing pipe 41 includes: the air nozzle 42 is arranged on the lower horn section 41-3, and the smoke negative pressure chamber 43 and the lower horn section 41-3 are vertically and integrally arranged. The structure of the right-side ejector 5 is the same as that of the left-side ejector 4.
The first cut-off valve 1 is installed above the air nozzles in the left and right injectors (4, 5), namely, straight pipe sections of the left and right injectors.
The loop flanges of the left ejector and the right ejector (4 and 5) are connected with an external air blower and used for ejecting air and smoke, so that the arrangement of the air blower and the arrangement of a smoke pipeline are facilitated, and when the heat accumulating type combustor is used, an induced draft fan can be omitted according to the number of heat accumulating type combustors and the pressure process requirement in a furnace.
A reversing method of a reversing device for regenerative combustion, as shown in fig. 5(1) and fig. 5(2), comprising the steps of:
(100) the left side of the first shut-off valve 1 is opened, and the right side of the first shut-off valve 1 is closed; at the moment, the air nozzle in the left ejector 4 ejects air, negative pressure is generated in the mixing pipe of the left ejector 4, the smoke negative pressure chamber of the left ejector 4 sucks smoke from the heat accumulating type burner, and the smoke is discharged from the top of the mixing pipe of the left ejector 4; the air nozzle in the right side ejector 5 sprays air, and the air enters the heat accumulating type combustor from the smoke negative pressure chamber of the right side ejector 5 for supporting combustion because the right side of the first cut-off valve 1 is closed;
(200) the right side of the first shut-off valve 1 is opened, and the left side of the first shut-off valve 1 is closed; at the moment, the air nozzle in the left side ejector 4 ejects air, and the air enters the heat accumulating type combustor from the smoke negative pressure chamber of the left side ejector 4 for supporting combustion because the left side of the first cut-off valve 1 is closed; an air nozzle in the right ejector 5 ejects air, negative pressure is generated in a mixing pipe of the right ejector 5, a smoke negative pressure chamber of the right ejector 5 sucks smoke from a heat accumulating type burner, and the smoke is discharged from the top of the mixing pipe of the right ejector 5; and finishing the air and flue gas reversing in one period.
(300) And (5) repeating the steps (100) and (200).
Example two
A reversing device for heat accumulating type combustion is shown in figure 1B and comprises a stop valve arranged on a left injector and a right injector, wherein the stop valve is a second stop valve 2 arranged on the top of a left injector 4 and a third stop valve 3 arranged on the top of a right injector 5; the reversing of air/flue gas can be realized, the safety and the stability are realized, and even if the sealing performance of the cut-off valve is poor, the air/flue gas mixing phenomenon does not exist.
The left ejector 4 comprises a mixing pipe 41 and a smoke negative pressure chamber 43 which are vertically connected, an air nozzle 42 is installed in the mixing pipe 41, the bottom of the air nozzle 42 is connected with a loop flange 44, and the smoke negative pressure chamber 43 is matched with an air flange and a smoke flange of a heat accumulating type burner; the mixing pipe 41 includes: the air nozzle 42 is arranged on the lower horn section 41-3, and the smoke negative pressure chamber 43 and the lower horn section 41-3 are vertically and integrally arranged. The structure of the right-side ejector 5 is the same as that of the left-side ejector 4.
The second cut-off valve 2 and the third cut-off valve 3 are respectively and symmetrically arranged at the tops of the mixing pipes of the left ejector and the right ejector (4, 5).
The loop flanges of the left ejector and the right ejector (4 and 5) are connected with an external air blower and used for ejecting air and smoke, so that the arrangement of the air blower and the arrangement of a smoke pipeline are facilitated, and when the heat accumulating type combustor is used, an induced draft fan can be omitted according to the number of heat accumulating type combustors and the pressure process requirement in a furnace.
A reversing method of a reversing device for regenerative combustion, as shown in fig. 6(1) and fig. 6(2), comprising the steps of:
(100) the valve of the second cut-off valve 2 is opened, and the valve of the third cut-off valve 3 is closed; at the moment, the air nozzle in the left ejector 4 ejects air, negative pressure is generated in the mixing pipe of the left ejector 4, the smoke negative pressure chamber of the left ejector 4 sucks smoke from the heat accumulating type burner, and the smoke is discharged from the top of the mixing pipe of the left ejector 4; the air nozzle in the right side ejector 5 sprays air, and the air enters the heat accumulating type combustor from the smoke negative pressure chamber of the right side ejector 5 for supporting combustion due to the closing of the valve of the third cut-off valve 3;
(200) the valve of the third cut-off valve 3 is opened, and the valve of the second cut-off valve 2 is closed; at the moment, the air nozzle in the left side ejector 4 ejects air, and the air enters the heat accumulating type combustor from the smoke negative pressure chamber of the left side ejector 4 for supporting combustion due to the closing of the valve of the second cut-off valve 2; an air nozzle in the right ejector 5 ejects air, negative pressure is generated in a mixing pipe of the right ejector 5, a smoke negative pressure chamber of the right ejector 5 sucks smoke from a heat accumulating type burner, and the smoke is discharged from the top of the mixing pipe of the right ejector 5; and finishing the air and flue gas reversing in one period.
(300) And (5) repeating the steps (100) and (200).
The invention discloses a reversing device for heat accumulating type combustion and a reversing method thereof.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, and are used for convenience of description and simplicity of description only, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A reversing device for heat accumulating type combustion is characterized by comprising a stop valve arranged on a left injector and a right injector, wherein the stop valve is a first stop valve arranged between the left injector and the right injector, or a second stop valve arranged on the top of the left injector and a third stop valve arranged on the top of the right injector; the ejector comprises a mixing pipe and a smoke negative pressure chamber which are vertically connected, an air nozzle is installed in the mixing pipe, the bottom of the air nozzle is connected with a loop flange, and the smoke negative pressure chamber is matched with the air flange and the smoke flange of the heat accumulating type combustor.
2. The reversing device for regenerative combustion as claimed in claim 1, wherein the first cut-off valve is a pneumatic tandem gate cut-off valve.
3. The reverser for regenerative combustion according to claim 2, wherein the pneumatic tandem gate valve is installed above air injection heads in the left and right injectors.
4. The reversing device for regenerative combustion according to claim 1, wherein the second cutoff valve and the third cutoff valve are symmetrically installed at the top of the mixing pipe of the left and right injectors, respectively.
5. The reverser for regenerative combustion according to claim 1 wherein the lap joint flange is connected to an external blower.
6. The reversing device for regenerative combustion as claimed in claim 1, wherein said mixing duct comprises: last loudspeaker section, straight tube section and the lower loudspeaker section of down constituteing in proper order from the top, air shower nozzle installs loudspeaker section down, flue gas negative pressure chamber with loudspeaker section is perpendicular just integrative setting down.
7. The reversing device for regenerative combustion as claimed in claim 6, wherein the first cut valve is installed at straight pipe sections of the left and right injectors.
8. A reversing method for a reversing device for regenerative combustion according to any one of claims 1 to 7, comprising the steps of:
(100) the left side of the first cut-off valve is opened/the valve of the second cut-off valve is opened, and the right side of the first cut-off valve is closed/the valve of the third cut-off valve is closed; at the moment, the air nozzle in the left ejector sprays air, negative pressure is generated in the mixing pipe of the left ejector, the smoke negative pressure chamber of the left ejector sucks smoke from the heat accumulating type combustor, and the smoke is discharged from the top of the mixing pipe of the left ejector; the air nozzle in the right side ejector sprays air, and the air enters the heat accumulating type combustor from the smoke negative pressure chamber of the right side ejector for supporting combustion due to the closing of the right side of the first cut-off valve/the closing of the valve of the third cut-off valve;
(200) the right side of the first cut-off valve is opened/the valve of the third cut-off valve is opened, and the left side of the first cut-off valve is closed/the valve of the second cut-off valve is closed; at the moment, the air nozzle in the left side ejector sprays air, and the air enters the heat accumulating type combustor from the smoke negative pressure chamber of the left side ejector for supporting combustion due to the left side closing of the first cut-off valve/the closing of the valve of the second cut-off valve; an air nozzle in the right ejector sprays air, negative pressure is generated in a mixing pipe of the right ejector, a smoke negative pressure chamber of the right ejector sucks smoke from the heat accumulating type combustor, and the smoke is discharged from the top of the mixing pipe of the right ejector;
(300) and (5) repeating the steps (100) and (200).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010051556.9A CN111197742A (en) | 2020-01-17 | 2020-01-17 | Reversing device for heat accumulating type combustion and reversing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010051556.9A CN111197742A (en) | 2020-01-17 | 2020-01-17 | Reversing device for heat accumulating type combustion and reversing method thereof |
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| CN111197742A true CN111197742A (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010051556.9A Pending CN111197742A (en) | 2020-01-17 | 2020-01-17 | Reversing device for heat accumulating type combustion and reversing method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2068645U (en) * | 1990-02-20 | 1991-01-02 | 常熟市喷嘴厂 | Heat accumulation self-preheating burner |
| CN201318671Y (en) * | 2008-12-19 | 2009-09-30 | 河北九鼎冶金设备制造有限公司 | Automatic heat-accumulating preheating type nozzle |
| CN205780972U (en) * | 2016-06-30 | 2016-12-07 | 李志勇 | Open crossover valve and include the conversion equipment of this switching valve |
| KR101754212B1 (en) * | 2017-01-26 | 2017-07-06 | (주) 환경과에너지 | Regenerator combustion and oxidization apparatus opening harmful gas pipe, clean gas pipe and purge gas pipe, and closing harmful gas pipe, clean gas pipe and purge gas pipe using an open/close unit |
-
2020
- 2020-01-17 CN CN202010051556.9A patent/CN111197742A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2068645U (en) * | 1990-02-20 | 1991-01-02 | 常熟市喷嘴厂 | Heat accumulation self-preheating burner |
| CN201318671Y (en) * | 2008-12-19 | 2009-09-30 | 河北九鼎冶金设备制造有限公司 | Automatic heat-accumulating preheating type nozzle |
| CN205780972U (en) * | 2016-06-30 | 2016-12-07 | 李志勇 | Open crossover valve and include the conversion equipment of this switching valve |
| KR101754212B1 (en) * | 2017-01-26 | 2017-07-06 | (주) 환경과에너지 | Regenerator combustion and oxidization apparatus opening harmful gas pipe, clean gas pipe and purge gas pipe, and closing harmful gas pipe, clean gas pipe and purge gas pipe using an open/close unit |
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Application publication date: 20200526 |
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