CN112128753A - Low heat value gas burner - Google Patents
Low heat value gas burner Download PDFInfo
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- CN112128753A CN112128753A CN202011031748.XA CN202011031748A CN112128753A CN 112128753 A CN112128753 A CN 112128753A CN 202011031748 A CN202011031748 A CN 202011031748A CN 112128753 A CN112128753 A CN 112128753A
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- gas spray
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- spray gun
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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
- F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
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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
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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
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
Abstract
The application provides a low-calorific-value gas burner which comprises a gas cylinder, an air distribution body, a flame stabilizing cylinder and an ignition gun; the gas cylinder is connected with one end of the air distribution body, and the other end of the air distribution body is connected with the flame stabilizing cylinder; the inner cavity of the gas cylinder is communicated with the inner cavity of the air distribution body and the inner cavity of the flame stabilizing cylinder in sequence to form a communicated inner cavity; the gas cylinder is provided with a first-stage gas inlet and a second-stage gas inlet, the air distribution body is provided with an air inlet, the first-stage gas and the second-stage gas entering the communicated inner cavity are subjected to graded injection, and the air entering the communicated inner cavity is subjected to graded injection; the opposite end of the connecting end of the gas cylinder and the air distribution body is provided with a rear cover plate, the rear cover plate is connected with an ignition gun, and one end of the ignition gun extends into the communicating inner cavity; the ignition gun ignites the primary coal gas, the secondary coal gas and the air. The application utilizes air classification and coal gas classification principle, realizes the three-dimensional injection, intersection and the mixture of air and coal gas simultaneously, can realize burning more steadily and the ultralow nitrogen oxide discharges.
Description
Technical Field
The application belongs to the technical field of clean combustion, and particularly relates to a low-calorific-value gas burner.
Background
The low heat value gas is gas fuel with low heat value obtained by gasifying solid fuel such as coal or coke, wherein the combustible component is mainly CO and contains a large amount of CO2And N2And the like. The low-heat value coal gas is widely applied to various industrial boilers as an industrial fuel, and has a low heat value (generally 600-2000 kcal/Nm)3) The combustion is unstable, the combustion temperature is low, and the emission value of nitrogen oxides in the flue gas is generally 50-150 mg/m3In the scope, therefore, the combination mode of the traditional low-nitrogen burner and the FGR flue gas external circulation technology cannot meet the requirements of the stability of low-heating value gas combustion and the mandatory standard of nitrogen oxide emission at the same time.
Disclosure of Invention
To overcome, at least to some extent, the problems of the related art, the present application provides a low heating value gas burner.
According to an embodiment of the present application, there is provided a low calorific value gas burner, including a gas cylinder, a distribution body, a flame stabilizing cylinder, and an ignition gun; the gas cylinder is connected with one end of the air distribution body, and the other end of the air distribution body is connected with the flame stabilizing cylinder; the inner cavity of the gas cylinder is sequentially communicated with the inner cavity of the air distribution body and the inner cavity of the fire stabilizing cylinder to form a communicated inner cavity;
the gas cylinder is provided with a primary gas inlet and a secondary gas inlet, the air distribution body is provided with an air inlet, the primary gas and the secondary gas entering the communicating inner cavity are subjected to graded injection, and the air entering the communicating inner cavity is subjected to graded injection;
the opposite end of the connecting end of the gas cylinder and the air distribution body is provided with a rear cover plate, the rear cover plate is connected with an ignition gun, and one end of the ignition gun extends into the communicating inner cavity; the ignition gun ignites the primary coal gas, the secondary coal gas and the air.
In the low-calorific-value gas burner, a gas cavity is arranged in the gas cylinder and comprises a primary gas cavity and a secondary gas cavity, the primary gas cavity is communicated with the primary gas inlet, and the secondary gas cavity is communicated with the secondary gas inlet; the primary coal gas cavity is arranged on a central axis in the length direction of the communicated inner cavity, and the secondary coal gas cavity is arranged on the periphery of the primary coal gas cavity.
Furthermore, a primary gas spray gun group, a secondary gas spray gun group and a tertiary gas spray gun group are also arranged in the communicating inner cavity; the primary gas spray gun group is arranged on the periphery of the ignition gun, and each primary gas spray gun in the primary gas spray gun group is communicated with the primary gas cavity; the secondary gas spray gun group is arranged at the periphery of the primary gas spray gun group, and each secondary gas spray gun in the secondary gas spray gun group is communicated with the secondary gas cavity; the secondary gas spray gun group is arranged on the periphery of the secondary gas spray gun group, and each tertiary gas spray gun in the secondary gas spray gun group is communicated with the secondary gas cavity.
Furthermore, the primary gas spray gun comprises a primary gas spray pipe and a primary gas spray head, one end of the primary gas spray pipe is communicated with the primary gas cavity, and the other end of the primary gas spray pipe is connected with the primary gas spray head;
the secondary gas spray gun comprises a secondary gas spray pipe and a secondary gas spray head, one end of the secondary gas spray pipe is communicated with the secondary gas cavity, and the other end of the secondary gas spray pipe is connected with the secondary gas spray head;
the tertiary gas spray gun comprises a tertiary gas spray pipe and a tertiary gas spray head, one end of the tertiary gas spray pipe is communicated with the secondary gas cavity, and the other end of the tertiary gas spray pipe is connected with the tertiary gas spray head.
Furthermore, the number of the primary gas spray guns in the primary gas spray gun group is 3-24; the primary gas spray guns are uniformly arranged around the ignition gun according to the circumference;
the number of secondary gas spray guns in the secondary gas spray gun group is 6-36; the secondary gas spray guns are uniformly arranged around the primary gas spray gun group according to the circumference;
the number of the tertiary gas spray guns in the tertiary gas spray gun group is 8-48; and all the tertiary gas spray guns are uniformly arranged around the secondary gas spray gun group according to the circumference.
Furthermore, the primary gas spray head adopts a spray head with a vertical spraying structure, and the spraying direction of the primary gas spray head, the central axis of the length direction of the primary gas spray gun and the plane where the central axis of the communicated inner cavity are positioned form an included angle beta;
the secondary gas spray nozzle is of a direct-injection structure, and the included angle between the injection direction of the secondary gas spray nozzle and the plane where the central axis in the length direction of the secondary gas spray gun and the central axis communicated with the inner cavity are 0;
the tertiary gas spray head adopts a spray head with a vertical spraying structure, and the spraying direction of the tertiary gas spray head, the central axis of the tertiary gas spray gun in the length direction and the plane where the central axis communicated with the inner cavity are positioned form an included angle alpha.
Further, the included angles α and β are both acute angles, and α < β.
Furthermore, a channel between the ignition gun and the primary gas spray gun group is a primary air channel, a channel between the primary gas spray gun group and the secondary gas spray gun group is a secondary air channel, a channel between the secondary gas spray gun group and the tertiary gas spray gun group is a tertiary air channel, and a channel between the tertiary gas spray gun group and the side wall of the flame stabilizing cylinder and the side wall of the air distribution body is a quartic air channel.
Furthermore, an air swirler is arranged in the tertiary air channel and used for accelerating the mixing of air with the secondary coal gas and the tertiary coal gas.
In the low-calorific-value gas burner, the first regulating valve is arranged at the first-stage gas inlet, the second regulating valve is arranged at the second-stage gas inlet, and the proportion of the first-stage gas and the second-stage gas entering the communicating inner cavity is regulated by regulating the opening degrees of the first regulating valve and the second regulating valve.
According to the above embodiments of the present application, at least the following advantages are obtained: the low-heat value gas burner classifies the low-heat value gas and the air entering the low-heat value gas burner, so that the air and the low-heat value gas are mixed more uniformly and are combusted more fully, and the discharge amount of nitrogen oxides can be remarkably reduced under the condition of ensuring the combustion stability.
The low-calorific-value gas burner is provided with the primary gas nozzle, the secondary gas nozzle and the tertiary gas nozzle, wherein the primary gas nozzle adopts a nozzle with a vertical injection structure, the secondary gas nozzle adopts a nozzle with a direct injection structure, the tertiary gas nozzle adopts a nozzle with a vertical injection structure, and primary gas sprayed by the primary gas nozzle is slightly sprayed in an inward rotating mode; the secondary gas sprayed by the secondary gas spray head is directly sprayed out of the secondary gas spray head and expands towards the direction far away from the secondary gas spray head; the third coal gas sprayed out by the third coal gas spray head slightly rotates outwards to be sprayed out; the gas injection mode enables the gas to be injected in a three-dimensional mode, and then the gas is well mixed with air in an intersecting and uniform mode, so that stable combustion and ultralow emission of nitrogen oxides are achieved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the scope of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification of the application, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of a low heating value gas burner provided in an embodiment of the present application.
Fig. 2 is a schematic perspective view of a nozzle end of a low heating value gas burner provided in an embodiment of the present application.
Fig. 3 is a cross-sectional view of a burner tip end of a low heating value gas burner provided in an embodiment of the present application.
Fig. 4 is a schematic diagram of a gas injection direction of a low heating value gas burner provided in an embodiment of the present application.
Description of reference numerals:
1. a gas cylinder;
11. a primary gas inlet; 111. a first regulating valve;
12. a secondary gas inlet; 121. a second regulating valve;
13. a primary coal gas cavity; 14. a secondary gas cavity;
15. a primary gas lance set; 151. a primary gas nozzle; 152. a primary gas shower nozzle;
16. a secondary gas lance group; 161. a secondary gas jet pipe; 162. a secondary gas nozzle;
17. a tertiary gas lance group; 171. a tertiary gas spray pipe; 172. a third gas nozzle;
2. a wind distribution body;
21. an air inlet; 22. a primary air channel; 23. a secondary air passage; 24. a tertiary air channel; 25. a fourth air passage; 26. an air swirler;
3. a flame stabilizing cylinder; 4. an ignition gun; 5. a rear cover plate; 6. fire detection probe.
Detailed Description
For the purpose of promoting a clear understanding of the objects, aspects and advantages of the embodiments of the present application, reference will now be made to the accompanying drawings and detailed description, wherein like reference numerals refer to like elements throughout.
The illustrative embodiments and descriptions of the present application are provided to explain the present application and not to limit the present application. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.
As used herein, "first," "second," …, etc., are not specifically intended to mean in a sequential or chronological order, nor are they intended to limit the application, but merely to distinguish between elements or operations described in the same technical language.
With respect to directional terminology used herein, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting of the present teachings.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
As used herein, "and/or" includes any and all combinations of the described items.
References to "plurality" herein include "two" and "more than two"; reference to "multiple sets" herein includes "two sets" and "more than two sets".
As used herein, the terms "substantially", "about" and the like are used to modify any slight variation in quantity or error that does not alter the nature of the variation. In general, the range of slight variations or errors that such terms modify may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the aforementioned values can be adjusted according to actual needs, and are not limited thereto.
Certain words used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present application.
The technologies capable of effectively reducing the emission of nitrogen oxides in the prior art comprise an air classification technology, a fuel classification technology, a flue gas circulation technology, a thick and thin combustion technology, a low-oxygen combustion technology and the like. The problem that nitrogen oxide that conventional heat accumulation formula combustor 1 exists discharges highly is solved to flue gas circulation technique.
Fig. 1 is a schematic structural diagram of a low heating value gas burner provided in an embodiment of the present application.
As shown in fig. 1, the low heating value gas burner provided by the embodiment of the present application includes a gas cylinder 1, a distributing body 2, a flame-stabilizing cylinder 3 and an ignition gun 4. Wherein, the gas cylinder 1 is connected with one end of the air distribution body 2 through a mounting flange and is fastened by bolts. The other end of the air distribution body 2 is connected with the fire stabilizing cylinder 3 through a mounting flange and is fastened by bolts.
The inner cavity of the gas cylinder 1 is communicated with the inner cavity of the air distribution body 2 and the inner cavity of the flame stabilizing cylinder 3 in sequence to form a communicated inner cavity.
The gas cylinder 1 is provided with a primary gas inlet 11 and a secondary gas inlet 12, the primary gas inlet 11 is provided with a first regulating valve 111, and the secondary gas inlet 12 is provided with a second regulating valve 121. The distribution ratio of the primary coal gas and the secondary coal gas can be conveniently adjusted by adjusting the opening degrees of the first adjusting valve 111 and the second adjusting valve 121, so that the combustion amount of the primary coal gas and the combustion amount of the secondary coal gas are controlled, and the purpose of reducing the discharge amount of nitrogen oxides is achieved.
The gas cylinder 1 is internally provided with a gas cavity which comprises a primary gas cavity 13 and a secondary gas cavity 14. Wherein, the primary gas inlet 11 is communicated with a primary gas cavity 13, and the secondary gas inlet 12 is communicated with a secondary gas cavity 14. The primary coal gas cavity 13 is arranged on a central axis communicated with the length direction of the inner cavity, and the secondary coal gas cavity 14 is arranged on the periphery of the primary coal gas cavity 13.
The opposite end of the connecting end of the gas cylinder 1 and the air distribution body 2 is provided with a rear cover plate 5. The rear cover plate 5 is connected with an ignition gun 4, the ignition gun 4 is positioned on the central axis of the length direction of the primary coal gas cavity 13, one end of the ignition gun 4 is positioned on the outer side of the rear cover plate 5, and the other end of the ignition gun 4 extends into the communicated inner cavity.
Be provided with fire on the back shroud 5 and examine probe 6, fire is examined probe 6 and is used for carrying out real-time detection to the burning operating mode in the combustor.
Fig. 2 is a schematic perspective view of a nozzle end of a low heating value gas burner provided in an embodiment of the present application. Fig. 3 is a cross-sectional view of a burner tip end of a low heating value gas burner provided in an embodiment of the present application.
As shown in fig. 1 to 3, a primary gas spray gun group 15, a secondary gas spray gun group 16 and a tertiary gas spray gun group 17 are further arranged in the communicating inner cavity. The primary gas spray gun group 15, the secondary gas spray gun group 16 and the tertiary gas spray gun group 17 are concentrically and annularly arranged. Wherein, the primary gas spray gun group 15 is arranged at the periphery of the ignition gun 4, and each primary gas spray gun in the primary gas spray gun group 15 is communicated with the primary gas cavity 13. The secondary gas spray gun group 16 is arranged at the periphery of the primary gas spray gun group 15, and each secondary gas spray gun in the secondary gas spray gun group 16 is communicated with the secondary gas cavity 14. The tertiary gas spray gun group 17 is arranged at the periphery of the secondary gas spray gun group 16, and each tertiary gas spray gun in the tertiary gas spray gun group 17 is communicated with the secondary gas cavity 14.
The air distribution body 2 is provided with an air inlet 21 so that air can enter the air distribution body 2.
In one embodiment, as shown in fig. 1, the primary gas injection lance includes a primary gas injection pipe 151 and a primary gas injection head 152, and one end of the primary gas injection pipe 151 communicates with the primary gas chamber 13 and the other end thereof is connected to the primary gas injection head 152. Specifically, the primary gas nozzle 152 is connected to the primary gas nozzle 151 through a screw, and an adjusting screw is disposed on a side wall of the primary gas nozzle 152, and is used to adjust an orientation of the primary gas nozzle 152 and fixedly connect the primary gas nozzle 152 to the primary gas nozzle 151.
The secondary gas spray gun comprises a secondary gas spray pipe 161 and a secondary gas spray nozzle 162, wherein one end of the secondary gas spray pipe 161 is communicated with the secondary gas cavity 14, and the other end of the secondary gas spray pipe is connected with the secondary gas spray nozzle 162. Specifically, the secondary gas nozzle 162 is connected to the secondary gas nozzle 161 through a screw thread, and an adjusting screw is disposed on a side wall of the secondary gas nozzle 162, and is used for adjusting the orientation of the secondary gas nozzle 162 and fixedly connecting the secondary gas nozzle 162 to the secondary gas nozzle 161.
The tertiary gas spray gun comprises a tertiary gas spray pipe 171 and a tertiary gas spray head 172, one end of the tertiary gas spray pipe 171 is communicated with the secondary gas cavity 14, and the other end of the tertiary gas spray pipe is connected with the tertiary gas spray head 172. Specifically, the tertiary gas nozzle 172 is connected to the tertiary gas nozzle 171 through a screw thread, and an adjusting screw is disposed on a side wall of the tertiary gas nozzle 172, and is used for adjusting the orientation of the tertiary gas nozzle 172 and fixedly connecting the tertiary gas nozzle 172 to the tertiary gas nozzle 171.
The primary gas enters the primary gas chamber 13 from the primary gas inlet 11, passes through the primary gas nozzle 151, and is ejected from the primary gas nozzle 152, which is called primary gas. The secondary gas enters a secondary gas cavity 14 from a secondary gas inlet 12; the gas is sprayed out from a secondary gas nozzle 162 through a secondary gas spray pipe 161, and is called as secondary gas; passes through the tertiary gas nozzle 171 and is sprayed out from the tertiary gas nozzle 172, which is called tertiary gas.
Along the width direction of the communicating inner cavity, the self-ignition gun 4 faces outwards, the primary gas spray gun group 15, the secondary gas spray gun group 16 and the tertiary gas spray gun group 17, the side wall of the fire stabilizing cylinder 3 and the side wall of the air distribution body 2 divide the space outside the gas cavity in the communicating inner cavity into a primary air channel 22, a secondary air channel 23, a tertiary air channel 24 and a quartic air channel 25 in sequence. Specifically, a passage between the ignition gun 4 and the primary gas spray gun group 15 is a primary air passage 22, a passage between the primary gas spray gun group 15 and the secondary gas spray gun group 16 is a secondary air passage 23, a passage between the secondary gas spray gun group 16 and the tertiary gas spray gun group 17 is a tertiary air passage 24, and a passage between the tertiary gas spray gun group 17 and the side wall of the flame-stabilizing cylinder 3 and the side wall of the air distribution body 2 is a quartic air passage 25. Wherein, an air swirler 26 is disposed in the tertiary air passage 24, and the air swirler 26 is disposed adjacent to the secondary gas nozzle 162 and the tertiary gas nozzle 172. The air swirler 26 is used to accelerate the mixing of air with the secondary and tertiary gas.
When the low-heating-value gas burner provided by the embodiment of the application works, the opening degrees of the first regulating valve 111 and the second regulating valve are controlled to reach respective preset opening degrees.
The primary gas enters the primary gas chamber 13 from the primary gas inlet 11 through the first regulating valve 111, passes through the primary gas nozzle 151, and is ejected from the primary gas nozzle 152.
The secondary gas enters the secondary gas cavity 14 from the secondary gas inlet 12 through the second regulating valve 121; a part of the secondary gas passes through the secondary gas nozzle 161 and is sprayed out from the secondary gas nozzle 162; the other part of the secondary gas passes through the tertiary gas nozzle 171 and is sprayed out from the tertiary gas nozzle 172.
Air enters the air distributor 2 from the air inlet 21 on the air distributor 2 and is diffused into the primary air passage 22, the secondary air passage 23, the tertiary air passage 24 and the quaternary air passage 25.
The ignition gun 4 is controlled to ignite, the primary gas sprayed from the primary gas nozzle 152 is combusted, and the flue gas generated by the combustion is used as a diluting medium for diluting the concentration of the secondary gas sprayed from the secondary gas nozzle 162 and the concentration of the tertiary gas sprayed from the tertiary gas nozzle 172, so that lower nitrogen oxide emission is realized under the condition of ensuring the combustion stability.
Fig. 3 is a cross-sectional view of a low heating value gas burner nozzle end provided in an embodiment of the present application.
As shown in fig. 3, the number of the primary gas injection lances in the primary gas injection lance group 15 is 3 to 24, and specifically, may be 8. The primary gas spray guns are uniformly arranged around the ignition gun 4 according to the circumference.
The number of secondary gas spray guns in the secondary gas spray gun group 16 is 6-36, specifically, 16. The secondary gas spray guns are uniformly arranged around the primary gas spray gun group 15 according to the circumference.
The number of the tertiary gas spray guns in the tertiary gas spray gun group 17 is 8-48, specifically, 24. The tertiary gas lances are arranged circumferentially and uniformly around the secondary gas lance group 16.
Fig. 4 is a schematic diagram of a gas injection direction of a low heating value gas burner provided in an embodiment of the present application.
As shown in fig. 4, the primary gas nozzle 152 is a nozzle having a vertical injection structure, and an included angle β is formed between an injection direction of the nozzle and a plane where a central axis of the primary gas spray gun and a central axis of the communicating cavity are located. The secondary gas spray nozzle 162 is a spray nozzle of a direct injection structure, and an included angle between the spray direction of the spray nozzle and a plane where a central axis of the secondary gas spray gun and a central axis of the communicating inner cavity are located is 0. The tertiary gas spray head 172 is a spray head of a vertical spraying structure, and the included angle between the spraying direction and the plane where the central axis in the length direction of the tertiary gas spray gun and the central axis communicated with the inner cavity are alpha. Wherein angles α and β are both acute angles, and α < β.
The injection effects produced by the primary gas nozzle 152, the secondary gas nozzle 162 and the tertiary gas nozzle 172 are as follows: the primary gas generates a left-handed effect and is slightly sprayed out in a rotating mode towards the inner side; the secondary gas is directly sprayed out from the secondary gas nozzle 162 and expands in the direction far away from the secondary gas nozzle 162; the third coal gas generates a left-handed effect and is slightly sprayed outwards in a rotating way. The gas can be sprayed in a three-dimensional mode by the aid of the spraying effect, so that the gas is better distributed and conveyed to different areas, combustion areas are enlarged, and the phenomenon that the temperature is too concentrated and nitrogen oxides are less generated can be avoided.
With the increasing environmental protection of national and local governments, many places in the country have established local standards which are the same as the requirements of the atmospheric pollutant emission standard of the DB11139-2015 boiler implemented by Beijing and Shanghai, namely the emission requirement of nitrogen oxides is 30mg/m3The following. The low-heating-value gas burner provided by the embodiment of the application is matched with the fan, the pipeline valve group and the control system for use, so that the emission requirement of the above nitrogen oxides can be met under the condition of ensuring the combustion stability.
The foregoing is merely an illustrative embodiment of the present application, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principles of the present application shall fall within the protection scope of the present application.
Claims (10)
1. A low-heat value gas burner is characterized by comprising a gas cylinder, an air distribution body, a flame stabilizing cylinder and an ignition gun; the gas cylinder is connected with one end of the air distribution body, and the other end of the air distribution body is connected with the flame stabilizing cylinder; the inner cavity of the gas cylinder is sequentially communicated with the inner cavity of the air distribution body and the inner cavity of the fire stabilizing cylinder to form a communicated inner cavity;
the gas cylinder is provided with a primary gas inlet and a secondary gas inlet, the air distribution body is provided with an air inlet, the primary gas and the secondary gas entering the communicating inner cavity are subjected to graded injection, and the air entering the communicating inner cavity is subjected to graded injection;
the opposite end of the connecting end of the gas cylinder and the air distribution body is provided with a rear cover plate, the rear cover plate is connected with an ignition gun, and one end of the ignition gun extends into the communicating inner cavity; the ignition gun ignites the primary coal gas, the secondary coal gas and the air.
2. The low heating value gas burner of claim 1, wherein a gas cavity is formed inside the gas cylinder, the gas cavity comprises a primary gas cavity and a secondary gas cavity, the primary gas cavity is communicated with the primary gas inlet, and the secondary gas cavity is communicated with the secondary gas inlet; the primary coal gas cavity is arranged on a central axis in the length direction of the communicated inner cavity, and the secondary coal gas cavity is arranged on the periphery of the primary coal gas cavity.
3. The low heating value gas burner of claim 2, wherein a primary gas spray gun group, a secondary gas spray gun group and a tertiary gas spray gun group are further arranged in the communicating inner cavity; the primary gas spray gun group is arranged on the periphery of the ignition gun, and each primary gas spray gun in the primary gas spray gun group is communicated with the primary gas cavity; the secondary gas spray gun group is arranged at the periphery of the primary gas spray gun group, and each secondary gas spray gun in the secondary gas spray gun group is communicated with the secondary gas cavity; the secondary gas spray gun group is arranged on the periphery of the secondary gas spray gun group, and each tertiary gas spray gun in the secondary gas spray gun group is communicated with the secondary gas cavity.
4. The low heating value gas burner of claim 3, wherein the primary gas spray gun comprises a primary gas spray pipe and a primary gas spray head, one end of the primary gas spray pipe is communicated with the primary gas cavity, and the other end of the primary gas spray pipe is connected with the primary gas spray head;
the secondary gas spray gun comprises a secondary gas spray pipe and a secondary gas spray head, one end of the secondary gas spray pipe is communicated with the secondary gas cavity, and the other end of the secondary gas spray pipe is connected with the secondary gas spray head;
the tertiary gas spray gun comprises a tertiary gas spray pipe and a tertiary gas spray head, one end of the tertiary gas spray pipe is communicated with the secondary gas cavity, and the other end of the tertiary gas spray pipe is connected with the tertiary gas spray head.
5. The low heating value gas burner of claim 4, wherein the number of the primary gas spray guns in the primary gas spray gun group is 3-24, and each primary gas spray gun is uniformly arranged around the ignition gun according to the circumference;
the number of secondary gas spray guns in the secondary gas spray gun group is 6-36; the secondary gas spray guns are uniformly arranged around the primary gas spray gun group according to the circumference;
the number of the tertiary gas spray guns in the tertiary gas spray gun group is 8-48; and all the tertiary gas spray guns are uniformly arranged around the secondary gas spray gun group according to the circumference.
6. The low heating value gas burner of claim 5, wherein the primary gas burner is a burner with a vertical jet structure, and the included angle between the jet direction and the plane where the central axis of the primary gas lance in the length direction and the central axis of the communicating inner cavity are beta;
the secondary gas spray head adopts a spray head with a direct injection structure, and the included angle between the injection direction of the secondary gas spray head and the plane where the central axis in the length direction of the primary gas spray gun and the central axis communicated with the inner cavity are 0;
the tertiary gas spray head adopts a spray head with a vertical spraying structure, and the spraying direction of the tertiary gas spray head, the central axis of the primary gas spray gun in the length direction and the plane where the central axis communicated with the inner cavity are positioned form an included angle alpha.
7. The low heating value gas burner of claim 6, wherein the included angles α and β are both acute angles, and α < β.
8. The low heating value gas burner as claimed in claim 3, wherein the passage between the ignition lance and the primary gas injection lance group is a primary air passage, the passage between the primary gas injection lance group and the secondary gas injection lance group is a secondary air passage, the passage between the secondary gas injection lance group and the tertiary gas injection lance group is a tertiary air passage, and the passage between the tertiary gas injection lance group and the side wall of the flame-stabilizing cylinder and the side wall of the air distribution body is a quartic air passage.
9. A low heating value gas burner as claimed in claim 8, wherein an air swirler is provided in the tertiary air passage for accelerating mixing of air with the secondary gas and the tertiary gas.
10. The low heating value gas burner as claimed in claim 1, wherein a first regulating valve is provided at the primary gas inlet, a second regulating valve is provided at the secondary gas inlet, and the ratio of the primary gas and the secondary gas entering the communicating chamber is adjusted by adjusting the opening degree of the first regulating valve and the second regulating valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011031748.XA CN112128753B (en) | 2020-09-27 | 2020-09-27 | Low heat value gas burner |
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| CN202011031748.XA CN112128753B (en) | 2020-09-27 | 2020-09-27 | Low heat value gas burner |
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| CN112128753A true CN112128753A (en) | 2020-12-25 |
| CN112128753B CN112128753B (en) | 2023-08-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944344A (en) * | 2021-02-09 | 2021-06-11 | 鞍钢股份有限公司 | Oxygen jet flow multistage dispersion combustion roaster |
| CN113566194A (en) * | 2021-07-08 | 2021-10-29 | 华侨大学 | Cyclone burner based on multi-nozzle structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112944344A (en) * | 2021-02-09 | 2021-06-11 | 鞍钢股份有限公司 | Oxygen jet flow multistage dispersion combustion roaster |
| CN113566194A (en) * | 2021-07-08 | 2021-10-29 | 华侨大学 | Cyclone burner based on multi-nozzle structure |
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| Publication number | Publication date |
|---|---|
| CN112128753B (en) | 2023-08-29 |
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