Combustor

Abstract

The utility model discloses a burner, which relates to the technical field of burners, and comprises a mixing pipe, a fan and a material conveying pipe, one end of the mixing pipe is communicated with an air outlet of the fan, the other end of the mixing pipe is connected with a burning assembly, one end of the material conveying pipe is positioned in the mixing pipe, and the other end of the material conveying pipe is communicated with the fan. A plurality of spray heads are arranged in the mixing pipe in the circumferential direction of the mixing pipe at intervals and all communicate with the conveying pipe. A plurality of fuel outlets are formed in the mixing pipe by adopting a mounting mode that the plurality of spray heads are arranged at intervals in the circumferential direction of the mixing pipe; the fan is started, the spray heads are started, fuel sprayed out of the spray heads is mixed with the combustion improver, the multiple spray heads can enable the fuel to be evenly mixed with the combustion improver, the mixing uniformity between the combustion improver and the fuel is improved, and sufficient combustion of the fuel is facilitated; and the combustion efficiency of the combustor is integrally improved.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a burner. Background Art

[0002] In the combustion and utilization of fossil fuels, such as in factories, fossil fuels are often burned with the help of burners. Common burners include a feed port located on one side of a mixing chamber of the burner and an air inlet located on the other side of the mixing chamber. The fuel is fed into the mixing chamber from the feed port, and the combustion aid (oxygen) enters the mixing chamber from the air inlet. This tends to cause more fuel in the area of ​​the mixing chamber near the feed port, and more combustion aid in the area of ​​the mixing chamber near the air inlet. The fuel and the combustion aid are not mixed evenly, which tends to reduce the combustion efficiency of the burner. Utility Model Content

[0003] The main purpose of the utility model is to provide a burner, aiming to improve the combustion efficiency of the burner.

[0004] To achieve the above-mentioned purpose, the burner proposed in the present invention includes a mixing tube, a fan and a feed pipe. One end of the mixing tube is connected to the air outlet of the fan, and the other end is connected to the combustion assembly. One end of the feed pipe is located in the mixing tube. A plurality of nozzles are provided in the mixing tube at intervals along the circumference of the mixing tube, and the plurality of nozzles are all connected to the feed pipe.

[0005] In one embodiment, a flow dividing ring pipe is provided in the mixing tube, a plurality of the nozzles are connected to the flow dividing ring pipe at intervals, and the flow dividing ring pipe is communicated with the material conveying pipe.

[0006] In one embodiment, the nozzle is connected to a side of the flow dividing ring pipe away from the fan; and / or a pipe rack is provided inside the mixing pipe, and the pipe rack is connected to the flow dividing ring pipe.

[0007] In one embodiment, a stirring assembly is provided in the mixing tube, and the stirring assembly is located on a side of the nozzle close to the combustion assembly.

[0008] In one embodiment, a bracket is provided inside the mixing tube, and the stirring assembly includes a stirring blade and a driving member. The stirring blade is rotatably provided on the bracket, and the driving member is used to drive the stirring blade to rotate.

[0009] In one embodiment, the driving member is a stirring motor provided on the bracket, and the output shaft of the stirring motor is connected to the stirring blade.

[0010] In one embodiment, the mixing tube includes a straight pipe section and a flared section connected in sequence, the diameter of the flared section is not smaller than the diameter of the straight pipe section, and the flared section is located between the straight pipe section and the combustion assembly, and the stirring blade is located in the flared section.

[0011] In one embodiment, the nozzle is located in the straight pipe section.

[0012] In one embodiment, the combustion assembly includes a flue gas collection pipe and a combustion head connected in sequence, and the flue gas collection pipe is connected to the mixing pipe.

[0013] In one embodiment, the blower includes at least one of a combustion-supporting air motor, a combustion-supporting air actuator, and an air pressure switch; and / or, a solenoid valve and / or a safety shut-off valve is provided on the feed pipe.

[0014] The technical solution of the present invention adopts an installation method in which multiple nozzles are arranged at intervals along the circumference of the mixing tube, thereby forming multiple fuel outlets in the mixing tube; when the fuel and the combustion improver need to be mixed and burned, the fan is turned on and the nozzle is started, the fan sends the combustion improver into the mixing tube and flows along the mixing tube, the nozzle can spray out powdered or droplet-shaped fuel, and the fuel sprayed by the nozzle is mixed with the combustion improver. The multiple nozzles can make the fuel and the combustion improver mixed more evenly; when the combustion improver and the fuel continue to flow in the mixing tube, the combustion improver and the fuel can be further mixed, thereby improving the uniformity of the mixing between the combustion improver and the fuel, and facilitating the full combustion of the fuel; the overall combustion efficiency of the burner is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0016] Figure 1 A schematic structural diagram of an embodiment of a burner provided by the present utility model;

[0017] Figure 2 for Figure 1 A partial cross-sectional schematic diagram of a burner in FIG.

[0018] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0019] Description of Figure Numbers:

[0020] 1. Mixing tube; 11. Straight pipe section; 12. Expanding section; 2. Fan; 21. Combustion-supporting air motor; 22. Combustion-supporting air actuator; 23. Air pressure switch; 3. Feed pipe; 31. Solenoid valve; 32. Safety shut-off valve; 4. Combustion assembly; 41. Flue gas collection pipe; 42. Burner head; 5. Nozzle; 6. Diverter ring pipe; 61. Pipe rack; 7. Stirring assembly; 71. Stirring blade; 72. Drive element; 8. Bracket; 81. Support rod; 9. Rotating shaft.

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] The common burner comprises a mixing pipe, a fan and a material conveying pipe, a mixing chamber is formed in the mixing pipe, an air inlet is arranged on one side of the mixing chamber, a material conveying port is arranged on the other side of the mixing chamber, fuel is conveyed into the mixing chamber from the material conveying port, combustion-supporting agent (oxygen) is conveyed into the mixing chamber from the air inlet, the fuel is more in the region of the mixing chamber close to the material conveying port, the combustion-supporting agent is more in the region of the mixing chamber close to the air inlet, the combustion-supporting agent and the fuel are not uniformly mixed in the mixing chamber, after the mixture of the fuel and the combustion-supporting agent in the mixing chamber is conveyed into the combustion head at the end of the mixing pipe, the fuel is difficult to be fully combusted, and the combustion efficiency of the burner is reduced.

[0026] The utility model provides a kind of burner.

[0027] Please refer to Figure 1 、 Figure 2 And Figure 3 In an embodiment of the utility model, the burner comprises a mixing pipe 1, a fan 2 and a material conveying pipe 3, one end of the mixing pipe 1 is communicated with the air outlet of the fan 2, the other end is connected with a combustion assembly 4, one end of the material conveying pipe 3 is located in the mixing pipe 1, a plurality of spray heads 5 are arranged in the mixing pipe 1 along the circumference of the mixing pipe 1, and the plurality of spray heads 5 are communicated with the material conveying pipe 3.

[0028] The technical scheme of the utility model improves the combustion efficiency of the burner by arranging a plurality of spray heads 5 along the circumference of the mixing pipe 1, forming a plurality of fuel outlets in the mixing pipe 1, opening the fan 2 and starting the spray heads 5 when fuel and combustion-supporting agent need to be mixed and combusted, conveying combustion-supporting agent into the mixing pipe 1 by the fan 2 and making it flow along the mixing pipe 1, spraying powder or mist droplet fuel by the spray heads 5, mixing the fuel sprayed by the spray heads 5 with combustion-supporting agent, mixing fuel and combustion-supporting agent more uniformly by the plurality of spray heads 5, further mixing combustion-supporting agent and fuel when combustion-supporting agent and fuel continue to flow in the mixing pipe 1, improving the uniformity of the mixture of combustion-supporting agent and fuel, facilitating full combustion of fuel, and improving the combustion efficiency of the burner as a whole.

[0029] When the combustion-supporting agent conveyed by the fan 2 is air, the combustion efficiency of the burner is improved by full combustion of fuel, nitrogen oxides produced after incomplete combustion are reduced, the effect of low-nitrogen combustion of the burner is realized, the emission of nitrogen oxides is reduced, and the environment is protected.

[0030] Please refer to Figure 1The fan 2 includes at least one of a combustion-supporting wind motor 21, a combustion-supporting wind actuator 22, and an air pressure switch 23. Preferably, the fan 2 includes the combustion-supporting wind motor 21, the combustion-supporting wind actuator 22, and the air pressure switch 23. The combustion-supporting wind actuator 22 and the air pressure switch 23 are both electrically connected to the combustion-supporting wind motor 21. When the combustion-supporting wind motor 21 is started, the fan 2 can transport the combustion-supporting agent into the mixing tube 1. After the combustion-supporting wind actuator 22 is turned on, the combustion-supporting wind motor 21 is powered on, the combustion-supporting wind motor 21 is started, and the fan 2 can transport the combustion-supporting agent into the mixing tube 1. The combustion-supporting gas can be air or oxygen. When a blockage occurs in the burner, the air outlet of the fan 2 is restricted, causing the gas pressure in the fan 2 to increase; when the pressure of the gas in the fan 2 reaches the preset value of the air pressure switch 23, the air pressure switch 23 is started, and the air pressure switch 23 cuts off the power to the combustion-supporting wind motor 21, causing the fan 2 to stop running, thereby protecting the fan 2.

[0031] The feed pipe 3 is provided with a solenoid valve 31 and / or a safety shut-off valve 32. Preferably, the solenoid valve 31 and the safety shut-off valve 32 are provided on the feed pipe 3, and the solenoid valve 31 and the safety shut-off valve 32 are sequentially arranged along the direction of fuel movement in the feed pipe 3. When the safety shut-off valve 32 is open, the opening and closing of the solenoid valve 31 can be remotely controlled to control the flow of the feed pipe 3; when the solenoid valve 31 is open, the opening and closing of the safety shut-off valve 32 can be controlled on-site to control the flow of the feed pipe 3; when either the solenoid valve 31 or the safety shut-off valve 32 is closed, the feed pipe 3 can be closed; when it is necessary to close the feed pipe 3, the flow of fuel in the feed pipe 3 can be stopped by closing either the solenoid valve 31 or the safety shut-off valve 32.

[0032] See also Figure 2 and Figure 3 A diverter ring 6 is provided in the mixing tube 1. Multiple nozzles 5 are connected to the diverter ring 6 at intervals. The diverter ring 6 is in communication with the feed pipe 3. After the fuel in the feed pipe 3 is fed into the diverter ring 6, the diverter ring 6 can simultaneously supply fuel to the multiple nozzles 5. The multiple nozzles 5 are connected via the diverter ring 6, which can make the fuel pressures in the multiple nozzles 5 close, making the discharge speeds of the multiple nozzles 5 relatively close, thereby evenly spraying the fuel in the mixing tube 1.

[0033] The diverter ring tube 6 is a pipe connected end to end, the diverter ring tube 6 is a circular ring, and the cross-section of the diverter ring tube 6 is circular. The axis of the diverter ring tube 6 is not perpendicular to the axis of the mixing tube 1. Preferably, the axis of the separation ring tube is coaxial with the axis of the mixing tube 1, which can reduce the overlapping area of ​​the fuel injection range of different nozzles 5.

[0034] A connecting branch pipe can also be set between the feed pipe 3 and the nozzle 5. The connecting branch pipes are set one by one corresponding to the nozzle 5, and the angles between adjacent connecting branches are the same. Through multiple connecting branches, the fuel in the feed pipe 3 can be delivered to multiple nozzles 5 respectively.

[0035] The other end of the feed pipe 3 is used to connect to a fuel storage tank or a fuel pipeline. The feed pipe 3 can transport a water slurry mixture of fuel or fuel particles. The feed pipe 3 can also transport some gaseous fuel, thereby realizing the transportation of fuel.

[0036] The nozzle 5 is connected to the side of the diverter ring 6 away from the fan 2; and / or a pipe rack 61 is provided inside the mixing tube 1, and the pipe rack 61 is connected to the diverter ring 6. By arranging the nozzle 5 on the side of the diverter ring 6 away from the fan 2, after the nozzle 5 sprays the fuel, the contact between the fuel and the diverter ring 6 can be reduced, and the mixing area of ​​the fuel and the combustion aid is located on the side of the diverter ring 6 away from the fan 2, so that the fuel and the combustion aid flow quickly after mixing, and the sedimentation of the fuel is reduced.

[0037] See also Figure 2 and Figure 3 The pipe rack 61 includes a fixing ring, which is sleeved on the diverter ring pipe 6 and fixedly connected to the inner wall of the mixing tube 1 through a connecting rod. With the help of the pipe rack 61, the diverter ring pipe 6 can be fixed, and there are multiple pipe racks 61. Multiple pipe racks 61 are arranged at intervals along the circumference of the diverter ring pipe 6. Multiple pipe racks 61 can improve the stability of the fixation of the diverter ring pipe 6.

[0038] There is a gap between the outer side of the diversion ring tube 6 and the inner wall of the mixing tube 1, which can be used for the combustion-supporting agent to flow through, so that the combustion-supporting agent is present on all sides of the nozzle 5, thereby improving the mixing effect between the fuel sprayed from the nozzle 5 and the combustion-supporting agent.

[0039] A stirring assembly 7 is provided in the mixing tube 1, and the stirring assembly 7 is located on the side of the nozzle 5 close to the combustion assembly 4. The fuel and the combustion improver are stirred by the stirring assembly 7, so that the fuel and the combustion improver are mixed more evenly.

[0040] A bracket 8 is provided inside the mixing tube 1. The stirring assembly 7 includes a stirring blade 71 and a driving member 72. The stirring blade 71 is rotatably mounted on the bracket 8. The driving member 72 is used to drive the stirring blade 71 to rotate. When the driving member 72 drives the stirring blade 71 to rotate, the combustion improver and the fuel are stirred, thereby accelerating the mixing of the combustion improver and the fuel.

[0041] The bracket 8 includes two sub-mounts arranged in sequence along the length of the mixing tube 1. The stirring blade 71 is located between the two sub-mounts. The sub-mounts include two mutually perpendicular support rods 81. The ends of the support rods 81 are respectively connected to the two opposite inner walls of the mixing tube 1, ensuring the stability of the sub-mounts. A rotating shaft 9 is rotatably connected between the two sub-mounts and is coaxial with the mixing tube 1.

[0042] The stirring blades 71 are arranged in plurality along the circumference of the rotating shaft 9. In this embodiment, there are three stirring blades 71, and the three stirring blades 71 are arranged at equal intervals around the circumference of the rotating shaft 9. The three stirring blades 71 can improve the stirring effect between the combustion aid and the fuel.

[0043] The driving member 72 is a stirring motor provided on the bracket 8 , and the output shaft of the stirring motor is coaxially fixedly connected to the rotating shaft 9 . After the stirring motor is started, the stirring motor can drive the rotating shaft 9 to rotate, thereby realizing the rotation of the stirring blade 71 .

[0044] The stirring motor is located on one side of the two sub-fixing frames close to the fan 2, and the stirring motor is fixedly mounted on a sub-fixing frame closest to the stirring motor, thereby achieving fixed installation of the stirring motor.

[0045] The combustion-supporting agent is generally air, and the driving member 72 can be a fan blade fixedly mounted on the rotating shaft 9. When the combustion-supporting agent flows, the fan blade can be driven to rotate the rotating shaft 9, thereby driving the stirring blade 71 to rotate.

[0046] See also Figure 1 、 Figure 2 and Figure 3 The mixing tube 1 includes a straight pipe section 11 and a flared section 12 connected in sequence. The diameter of the flared section 12 is not less than the diameter of the straight pipe section 11, and the flared section 12 is located between the straight pipe section 11 and the combustion assembly 4. The stirring blade 71 is located in the flared section 12. The flow rate of the fuel and the combustion aid is slowed down in the flared section 12. When the rotation speed of the stirring blade remains unchanged, the number of stirring times between the fuel and the combustion aid can be increased, thereby improving the stirring effect between the fuel and the combustion aid.

[0047] The nozzle 5 is located in the straight pipe section 11. The fuel and the combustion aid can be mixed in the straight pipe section 11, and the flow rate of the fuel and the combustion aid in the straight pipe section 11 is relatively fast. The pressure in the straight pipe section 11 is relatively high, which can reduce the sedimentation of the fuel in the straight pipe section 11.

[0048] The combustion assembly 4 includes a flue gas collection pipe 41 and a combustion head 42, which are connected in sequence. The flue gas collection pipe 41 is connected to the mixing pipe 1. The fuel and the combustion aid passing through the flared section 12 enter the flue gas collection pipe 41 and eventually enter the combustion head 42 for combustion. The flue gas collection pipe 41 can collect the flue gas discharged from the combustion head 42, facilitating the treatment of the flue gas. The flue gas collection pipe 41 can also preheat the fuel and combustion aid to facilitate the combustion of the fuel.

[0049] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A burner, characterized in that: It includes a mixing tube, a fan and a feed pipe. One end of the mixing tube is connected to the air outlet of the fan, and the other end is connected to the combustion assembly. One end of the feed pipe is located in the mixing tube. A plurality of nozzles are arranged in the mixing tube at intervals along the circumference of the mixing tube, and the plurality of nozzles are all connected to the feed pipe.

2. The burner according to claim 1, wherein A flow dividing ring pipe is provided in the mixing pipe, a plurality of the nozzles are connected to the flow dividing ring pipe at intervals, and the flow dividing ring pipe is communicated with the material conveying pipe.

3. The burner according to claim 2, characterized in that The nozzle is connected to a side of the flow dividing ring pipe away from the fan; and / or a pipe rack is provided inside the mixing pipe, and the pipe rack is connected to the flow dividing ring pipe.

4. The burner according to claim 1, wherein A stirring assembly is provided in the mixing tube, and the stirring assembly is located on a side of the nozzle close to the combustion assembly.

5. The burner according to claim 4, characterized in that A bracket is provided on the inner side of the mixing tube. The stirring assembly includes a stirring blade and a driving member. The stirring blade is rotatably arranged on the bracket, and the driving member is used to drive the stirring blade to rotate.

6. The burner according to claim 5, characterized in that The driving member is a stirring motor arranged on the bracket, and the output shaft of the stirring motor is connected to the stirring blade.

7. The burner according to claim 5, characterized in that The mixing tube includes a straight tube section and a flared section connected in sequence, the diameter of the flared section is not less than the diameter of the straight tube section, and the flared section is located between the straight tube section and the combustion assembly, and the stirring blade is located in the flared section.

8. The burner according to claim 7, wherein The nozzle is located in the straight pipe section.

9. The burner according to claim 1, wherein The combustion assembly comprises a flue gas collecting pipe and a combustion head which are connected in sequence, and the flue gas collecting pipe is connected to the mixing pipe.

10. The burner according to claim 1, wherein The blower includes at least one of a combustion-supporting air motor, a combustion-supporting air actuator and an air pressure switch; and / or the conveying pipe is provided with a solenoid valve and / or a safety shut-off valve.

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