CN211781065U - Flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating combustor - Google Patents
Flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating combustor Download PDFInfo
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- CN211781065U CN211781065U CN202020101608.4U CN202020101608U CN211781065U CN 211781065 U CN211781065 U CN 211781065U CN 202020101608 U CN202020101608 U CN 202020101608U CN 211781065 U CN211781065 U CN 211781065U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating combustor, include: the main box body, the heat storage box body and the left and right empty and flue gas interfaces are arranged from bottom to top in sequence; the main box body is connected with a combustion nozzle and a left and a right twoA telescoping tube assembly; a fuel channel is arranged in the main box body, a left heat storage channel and a right heat storage channel are arranged on two sides of the fuel channel, and the front ends of the left heat storage channel and the right heat storage channel respectively comprise a left nozzle and a right nozzle; a premixing chamber connected with the fuel channel and the combustion nozzle is arranged in the main box body, and the left nozzle and the right nozzle are respectively connected with the premixing chamber through a left mixing channel and a right mixing channel; a left return flue and a right return flue are respectively arranged in the left and right telescopic pipe components, the left return flue is connected with the left nozzle and the left mixing channel, and the right return flue is connected with the right nozzle and the right mixing channel. In this way, the utility model discloses can realize high temperature low oxygen burning, reduce flame combustion temperature, improve heat utilization ratio, and can reduce NOxThe emission of (2) and the environmental pollution are reduced.
Description
Technical Field
The utility model relates to a combustor technical field, in particular to flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating combustor.
Background
At present, in the steel and iron, metallurgical industry field, the current heat accumulation formula combustor that uses on the industrial furnace, two regenerator combustors of universal adoption are joined in marriage two fuel spray guns, arrange in pairs or in groups, two fuel spray guns are installed respectively in the sky of two heat accumulation combustors, in the flue gas passageway, during operation fuel spray gun and empty, the flue gas commutates simultaneously, when a fuel spray gun blowout fuel, another fuel spray gun closes no fuel and passes through, make easily like this and close in the spray gun that no fuel passes through remaining fuel discharged and cause the waste, cause the burning unclean, the low scheduling problem of thermal efficiency, and cause the burning loss coking of spray gun head easily, influence the life of spray gun.
Under the pressure of new environmental protection, the requirements of NOx emission and fuel energy conservation are increasingly severe, and in the existing regenerative combustion technology, because NOx generated during combustion of high-temperature air and fuel is very high and does not accord with the new emission standard of steel and metallurgical industrial furnaces, the regenerative combustion technology is rarely effectively applied to some occasions limited by conditions.
Therefore, how to improve the stability of the existing regenerative combustion and reduce the amount of NOx emission is a problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves is: aiming at the defects of the prior art, the flue gas self-circulation high-temperature low-oxygen heat accumulation type self-preheating burner is provided, so that an independent combustion and smoke exhaust whole body is formed. During work, the smoke needs to be reversed, the fuel does not need to be reversed, the head of the spray gun can be prevented from coking and burning under the action of high-temperature smoke, the service life of the spray gun is prolonged, meanwhile, the waste of the fuel can be avoided, the heat utilization rate is improved, and NO can be reducedxThe discharge of (a) is performed,and the environmental pollution is reduced.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating combustor, includes: the main box body, the heat storage box body and the left and right empty and flue gas interfaces are arranged from bottom to top in sequence; the main box body is connected with a combustion nozzle extending into the furnace and a left telescopic pipe assembly and a right telescopic pipe assembly which are positioned at two sides; a fuel channel is arranged in the middle of the main box body, a left heat storage channel and a right heat storage channel are arranged on two sides of the fuel channel, the front end of the left heat storage channel comprises a left nozzle, and the front end of the right heat storage channel comprises a right nozzle; a premixing chamber connected with the fuel channel is arranged in the main box body, the left nozzle is connected with the premixing chamber through a left mixing channel, the right nozzle is connected with the premixing chamber through a right mixing channel, and the premixing chamber is connected with the combustion nozzle; a left return flue is arranged in the left telescopic pipe assembly, a right return flue is arranged in the right telescopic pipe assembly, the left return flue is connected with the left nozzle and the left mixing channel, and the right return flue is connected with the right nozzle and the right mixing channel.
In a preferred embodiment of the present invention, the left nozzle and the right nozzle are at a certain cross angle.
In a preferred embodiment of the present invention, the left mixing channel and the right mixing channel converge at a certain crossing angle to the premixing chamber.
In a preferred embodiment of the present invention, a fuel lance is inserted into the fuel passage during operation.
In a preferred embodiment of the present invention, the left heat accumulating channel and the right heat accumulating channel are respectively connected to two heat accumulating chambers containing heat accumulators in the heat accumulating box.
In a preferred embodiment of the present invention, the left and right air and flue gas ports are respectively connected to two regenerators containing heat accumulators in the regenerator box.
In a preferred embodiment of the present invention, the left return flue and the right return flue are connected to each other through a flue gas left-right balance channel.
In a preferred embodiment of the present invention, there is a certain distance between the left return flue and the left nozzle and the left mixing channel; and a certain distance is reserved between the right return flue and the right nozzle and the right mixing channel.
In a preferred embodiment of the present invention, the premixing chamber contains an ignition channel and a flame detection channel, the ignition channel is installed with an ignition device, and the flame detection channel is installed with a flame detector.
In a preferred embodiment of the present invention, the flue gas self-circulation high-temperature low-oxygen heat accumulation self-preheating burner is further provided with a reversing device.
The utility model has the advantages that:
(1) the self forms an independent combustion and smoke exhaust whole, and has simple structure, convenient replacement and long service life.
(2) The spray guns with different fuels can be inserted into the fuel channel in the middle, the air and the flue gas need to be reversed, and the fuels do not need to be reversed, thereby avoiding the fuel waste and the coking and burning loss phenomena of the fuel channel caused by the fuel reversing.
(3) The main box body is divided into a left part and a right part by a fuel channel in the middle, and the self circulation of the flue gas is realized by the special injection structure design, so that the fuel and the high-temperature air are premixed and combusted in the low-oxygen atmosphere, the flame combustion temperature is effectively reduced, and the NO is reducedxAnd (4) generating.
Drawings
Fig. 1 is a schematic view of the external structure of the flue gas self-circulation high-temperature low-oxygen heat accumulation type self-preheating burner of the present invention;
FIG. 2 is a sectional view of the internal structure of the flue gas self-circulation high-temperature low-oxygen heat accumulating type self-preheating burner of the present invention;
fig. 3 is a sectional view of the flue gas self-circulation high-temperature low-oxygen heat accumulation type self-preheating burner of the present invention;
FIG. 4 is a sectional view A-A shown in FIG. 3;
the parts in the drawings are numbered as follows:
1. the device comprises a main box body, 2, a heat storage box body, 2-1, a left air interface, a flue gas interface, 2-2, a right air interface, a flue gas interface, 3, a combustion nozzle, 4-1, a left telescopic pipe assembly, 4-2, a right telescopic pipe assembly, 5, a fuel spray gun, 6, a flame detector, 7 and an ignition device.
The internal elements in the drawings are numbered as follows:
1-1 part of fuel channel, 1-21 parts of left heat storage channel, 1-22 parts of right heat storage channel, 1-23 parts of left nozzle, 1-24 parts of right nozzle, 1-31 parts of left return flue, 1-32 parts of right return flue, 1-33 parts of left and right smoke balance channel, 1-41 parts of left mixing channel, 1-42 parts of right mixing channel, 1-5 parts of premixing chamber, 1-6 parts of ignition channel and flame detection channel.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
Referring to fig. 1-4, it should be noted that the drawings provided in this embodiment illustrate the basic concept of the present invention, and the components in the drawings are drawn according to the number, shape and size of the components in practical implementation. The embodiment of the utility model provides an include:
as shown in fig. 1, a flue gas self-circulation high-temperature low-oxygen heat accumulation type self-preheating burner comprises: the main box body 1, the heat storage box body 2, the left air interface and the flue gas interface 2-1 and the right air interface and the flue gas interface 2-2 are arranged from bottom to top in sequence; the main box body 1 is connected with a combustion nozzle 3 extending into the furnace, and a left telescopic pipe assembly 4-1 and a right telescopic pipe assembly 4-2 which are positioned at two sides.
As an example, the left telescopic pipe component 4-1 and the right telescopic pipe component 4-2 can be positioned on the combustion equipment as required, so that the reasonable arrangement of a heat accumulating type combustor and smoke exhaust is facilitated, and the process selection of the combustion equipment is facilitated.
As an example, the regenerative burner is also provided with a reversing device (not depicted) for switching between air intake and flue gas exhaust. The reversing device is exemplified by a two-position four-way valve. Two interfaces in the two-position four-way valve are respectively connected with a left air interface, a flue gas interface 2-1, a right air interface and a flue gas interface 2-2, and in addition, the two interfaces (the left air interface, the flue gas interface 2-1, the right air interface and the flue gas interface 2-2) are respectively connected with an air blower and an induced draft fan. The reversing device is switched every other period, so that the air channel and the smoke channel alternately perform air inlet and smoke exhaust. In the present embodiment, the switching period is 60 s. In addition, the reversing device also comprises a controller, and the controller is used for controlling the reversing device to carry out reversing operation at regular time.
As shown in fig. 2-4, a fuel channel 1-1 is disposed in the middle of the main box 1, and when the main box is in operation, fuel guns 5 of different fuels can be inserted into the fuel channel 1-1, so that the air and flue gases need to be reversed and the fuels do not need to be reversed.
The two sides of the fuel channel 1-1 are provided with a left heat storage channel 1-21 and a right heat storage channel 1-22, so that air inlet and smoke exhaust are separated; the front ends of the left heat storage channels 1-21 are provided with left nozzles 1-23 with certain cross angles, and the front ends of the right heat storage channels 1-22 are provided with right nozzles 1-24 with certain cross angles, and the left nozzles 1-23 and the right nozzles are used for ejecting air during combustion and sucking smoke during smoke exhaust.
A premixing chamber 1-5 connected with the fuel channel 1-1 is arranged in the main box body 1, the left nozzle 1-23 is connected with the premixing chamber 1-5 through a left mixing channel 1-41, the right nozzle 1-24 is connected with the premixing chamber 1-5 through a right mixing channel 1-42, the left mixing channel 1-41 and the right mixing channel 1-42 are converged in the premixing chamber 1-5 at a certain crossing angle, and the premixing chamber 1-5 is connected with the combustion nozzle 3; a left return flue 1-31 is arranged in the left telescopic pipe component 4-1, a right return flue 1-32 is arranged in the right telescopic pipe component 4-2, the left return flue 1-31 is connected with the left nozzle 1-23 and the left mixing channel 1-41, and the right return flue 1-32 is connected with the right nozzle 1-24 and the right mixing channel 1-42; the low-oxygen air burner is used for guiding flue gas in a furnace to the positions of a left nozzle 1-23, a right nozzle 1-24, a left mixing channel 1-41 and a right mixing channel 1-42, forming jet flow by air sprayed from the left nozzle 1-23 or the right nozzle 1-24 during combustion, and guiding the flue gas to the left mixing channel 1-41 or the right mixing channel 1-42 to form low-oxygen air after air and flue gas are mixed. When smoke is discharged, the negative pressure of the left nozzle 1-23 or the right nozzle 1-24 sucks the smoke into the left heat storage channel 1-21 or the right heat storage channel 1-22, and the smoke is discharged from the left air interface 2-1 or the right air interface 2-2 after heat storage.
The premixing chambers 1-5 are internally provided with ignition channels and flame detection channels 1-6, the ignition channels are internally provided with ignition devices 7, the flame detection channels are internally provided with flame detectors 6, and the ignition channels and the flame detection channels can be used interchangeably according to fuel performance.
The low-oxygen air mixed by air and smoke from the left mixing channel 1-41 or the right mixing channel 1-42 in the premixing chamber 1-5 is mixed with fuel sprayed by a fuel spray gun 5, is ignited by an ignition device 6 arranged in an ignition channel, and is detected to be flame by a flame detector 7 arranged in a flame detection channel, thereby being beneficial to combustion safety, and the fuel and the low-oxygen air are stably combusted in a combustion nozzle 3 connected with the premixing chamber 1-5 and are finally sprayed into the furnace for complete combustion.
The left return flue 1-31 and the right return flue 1-32 are connected through a flue gas left and right balance channel 1-33, so that the amount of flue gas sucked by the left nozzle 1-23 and the right nozzle 1-24 or sprayed and sucked is balanced to a certain extent, the amount of flue gas at the positions of the left telescopic pipe assembly 4-1 and the right telescopic pipe assembly 4-2 is balanced, and the uniformity of furnace temperature is facilitated. Meanwhile, the communication of the balance channels 1-33 can reduce the interference of the fuel mixture and the low-oxygen air mixture in the premixing chamber 1-5 when the left nozzle 1-23 and the right nozzle 1-24 suck smoke.
As an example, as shown in fig. 2 and 3, the left heat storage channels 1 to 21 and the right heat storage channels 1 to 22 are connected to two heat storage chambers containing heat storage bodies in the heat storage tank body 2, respectively.
As an example, as shown in fig. 2 and 3, the left return flue 1-31 is spaced from the left nozzle 1-23 and the left mixing channel 1-41; a certain distance is reserved between the right return flue 1-32 and the right nozzle 1-24 and the right mixing channel 1-42.
As an example, the left air interface and the flue gas interface 2-1 and the right air interface and the flue gas interface 2-2 are respectively connected with two heat storage chambers which are provided with heat storage bodies and arranged in the heat storage box body 2.
The combustion method of the flue gas self-circulation high-temperature low-oxygen heat accumulating type self-preheating combustor comprises two steps of combustion and smoke exhaust, wherein during work, a liquid gas fuel spray gun 5 is inserted into a fuel channel 1-1, and introduced fuel enters a premixing chamber 1-5 according to a set ignition control method; during the air and flue gas reversing process, the fuel is optionally stopped to be supplied (2S-4S), so that incomplete combustion of the fuel caused by insufficient air in the reversing process can be avoided.
During combustion: the positive pressure air sent by the blower enters the left heat accumulation channel 1-21 or the right heat accumulation channel 1-22 in the main box body 1 after being preheated by the heat accumulation chamber in the heat accumulation box body 2 through the left air interface 2-1 or the right air interface 2-2 or the heat accumulation chamber in the heat accumulation box body 2, then the preheated high temperature air is sprayed out from the left nozzle 1-23 or the right nozzle 1-24, and the flue gas coming from the left smoke return duct 1-31 and the right smoke return duct 1-32 from the left telescopic tube component 4-1 or the right telescopic tube component 4-2 is sprayed and sucked into the left mixing channel 1-41 or the right mixing channel 1-42, so that the self-circulation backflow of the flue gas is realized, the mixed gas of the air and the flue gas is formed, and the oxygen content in the air is reduced. The low-oxygen air is mixed with fuel sprayed by a fuel spray gun 5 inserted into the fuel channel 1-1 in the premixing chamber 1-5, the low-oxygen air is ignited by an ignition device 6 arranged in the ignition channel and is detected by a flame detector 7 arranged in the flame detection channel, the fuel and the low-oxygen air are combusted in the combustion nozzle 3 and are finally sprayed into the furnace for combustion.
During smoke discharge: the flue gas generated by combustion at the left telescopic pipe assembly 4-1 and the right telescopic pipe assembly 4-2 is sucked by negative pressure at the left nozzle 1-23 or the right nozzle 1-24 through the left return flue 1-31 and the right return flue 1-32, enters a heat storage chamber on the heat storage box body 2 through the left heat storage channel 1-21 or the right heat storage channel 1-22 to finish heat storage, and is finally led out through the left air interface 2-1 or the right air interface 2-2 and the flue gas interface 2-2, and the flue gas is led out by adopting an induced draft fan or other devices capable of generating suction.
In summary, it is shown that: the utility model discloses a flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating combustor adopts special structural design, makes air/flue gas and fuel move according to the speed of design in respective passageway, and combustion air forms the hypoxemia air after mixing with the inspiratory flue gas of self-loopa, and oxygen content can reduce below 15%, mixes the burning with fuel in advance again and realizes high temperature hypoxemia burning, reaches and reduces NO and burnxAnd (4) generating.
In this embodiment, liquefied gas is used as fuel, and the air and flue gas reversing time is set to 60s, and the test shows that: when the furnace temperature is 1200 ℃, the air temperature of the preheated flue gas self-circulation high-temperature low-oxygen heat accumulating type self-preheating burner is less than or equal to 800 ℃, and the final flue gas discharge temperature is less than or equal to 150 ℃. Through the test: NOxDischarge amount of<120mg/m3（O2: 8%) emission of CO<50mg/m3（O2: 8%) compared with the existing similar metallurgical industrial furnace NOxHas an emission standard of<150mg/m3（O2: 8%) emission of CO<70mg/m3（O2: 8 percent) can meet the use requirement of the emission standard.
The utility model discloses a flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating burner only has a fuel spray gun, and it is located between two regenerators, separately with the heat accumulation passageway. When the device works, air/smoke gas is reversed, fuel does not need to be reversed, and head coking or service life reduction due to high temperature can be avoided when the fuel spray gun stops supplying fuel due to fuel reversing. In addition, the phenomena that fuel is pumped out from a flue to cause fuel waste and the temperature of the heat storage room is too high when the fuel is reversed can not occur.
The utility model discloses a flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating burner only needs to change the fuel spray gun, just can be fit for high calorific value fuel such as liquefied gas, natural gas, coke oven gas and light oil and use.
The utility model discloses a flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating burner, self form an independent burning and whole with discharging fume, simple structure, it is convenient to change, long service life. The combustion nozzle and the smoke exhaust port can be installed on the combustion equipment according to needs, so that the flame nozzle and the smoke exhaust port of the heat accumulating type combustor can be reasonably arranged conveniently, and the process selection of the combustion equipment is facilitated.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value. The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating combustor which characterized in that includes: the main box body, the heat storage box body and the left and right empty and flue gas interfaces are arranged from bottom to top in sequence; the main box body is connected with a combustion nozzle extending into the furnace and a left telescopic pipe assembly and a right telescopic pipe assembly which are positioned at two sides; a fuel channel is arranged in the middle of the main box body, a left heat storage channel and a right heat storage channel are arranged on two sides of the fuel channel, the front end of the left heat storage channel comprises a left nozzle, and the front end of the right heat storage channel comprises a right nozzle; a premixing chamber connected with the fuel channel is arranged in the main box body, the left nozzle is connected with the premixing chamber through a left mixing channel, the right nozzle is connected with the premixing chamber through a right mixing channel, and the premixing chamber is connected with the combustion nozzle; a left return flue is arranged in the left telescopic pipe assembly, a right return flue is arranged in the right telescopic pipe assembly, the left return flue is connected with the left nozzle and the left mixing channel, and the right return flue is connected with the right nozzle and the right mixing channel.
2. The flue gas self-circulation high-temperature low-oxygen heat accumulating type self-preheating burner as claimed in claim 1, wherein the left nozzle and the right nozzle are at a certain crossing angle.
3. The flue gas self-circulating high-temperature low-oxygen heat accumulating type self-preheating burner as claimed in claim 1, wherein the left mixing channel and the right mixing channel converge at a certain crossing angle to the premixing chamber.
4. The flue gas self-circulating high temperature low oxygen heat accumulating type self-preheating burner of claim 1, wherein a fuel spray gun is inserted into the fuel channel during operation.
5. The flue gas self-circulation high-temperature low-oxygen heat accumulating type self-preheating burner as claimed in claim 1, wherein the left heat accumulating channel and the right heat accumulating channel are respectively connected with two heat accumulating chambers provided with heat accumulators in the heat accumulating box body.
6. The flue gas self-circulation high-temperature low-oxygen heat accumulating type self-preheating burner as claimed in claim 1, wherein the left and right air and flue gas connectors are respectively connected with two heat accumulating chambers provided with heat accumulators in the heat accumulating box body.
7. The flue gas self-circulation high-temperature low-oxygen heat accumulating type self-preheating burner as claimed in claim 1, wherein the left return flue and the right return flue are connected through a flue gas left-right balance channel.
8. The flue gas self-circulation high-temperature low-oxygen heat accumulating type self-preheating burner as claimed in claim 1, wherein a certain distance is reserved between the left return flue and the left nozzle and the left mixing channel; and a certain distance is reserved between the right return flue and the right nozzle and the right mixing channel.
9. The flue gas self-circulation high-temperature low-oxygen heat accumulating type self-preheating burner as claimed in claim 1, wherein an ignition channel and a flame detection channel are arranged in the premixing chamber, an ignition device is arranged in the ignition channel, and a flame detector is arranged in the flame detection channel.
10. The flue gas self-circulation high-temperature low-oxygen heat accumulation type self-preheating burner as claimed in claim 1, wherein a reversing device is further mounted on the flue gas self-circulation high-temperature low-oxygen heat accumulation type self-preheating burner.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020101608.4U CN211781065U (en) | 2020-01-17 | 2020-01-17 | Flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating combustor |
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| CN202020101608.4U CN211781065U (en) | 2020-01-17 | 2020-01-17 | Flue gas self-loopa high temperature hypoxemia heat accumulation formula self preheating combustor |
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| CN211781065U true CN211781065U (en) | 2020-10-27 |
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