阅读说明：本技术 一种混气型燃烧器用防回火装置 (Tempering preventing device for gas mixing type combustor ) 是由 王志海 于 2021-10-26 设计创作，主要内容包括：本发明涉及热能工程技术领域,且公开了一种混气型燃烧器用防回火装置,包括外壳,所述外壳的内腔一端固定安装有混合管腔,所述混合管腔的一侧固定安装有位于外壳的内腔的燃烧腔,所述混合管腔的内腔固定安装有四个氢气管。本发明通过利用空气的流动,对一号喷头进行降温,使氢气的火焰传播速度下降,同时,使天然气火焰传播速度提高,有效防止回火现象,通过设计防护管组的管体直径值呈递进式变化,当空气在位于一号喷头外表面的防护管组的管体中流动时,有效的补偿因空气含热而导致的吸热不足,当空气在位于二号喷头外表面的防护管组的管体中流动时,可避免二号喷头处发生反导热现象,二号喷头的前端开口反降温的问题。(The invention relates to the technical field of heat energy engineering and discloses an anti-backfire device for a gas mixing type burner, which comprises a shell, wherein a mixing tube cavity is fixedly arranged at one end of an inner cavity of the shell, a combustion cavity positioned in the inner cavity of the shell is fixedly arranged at one side of the mixing tube cavity, and four hydrogen tubes are fixedly arranged in the inner cavity of the mixing tube cavity. According to the invention, the first spray head is cooled by utilizing the flowing of air, so that the flame propagation speed of hydrogen is reduced, meanwhile, the flame propagation speed of natural gas is increased, the tempering phenomenon is effectively prevented, the diameter value of the pipe body of the protective pipe group is designed to be changed in a progressive manner, when air flows in the pipe body of the protective pipe group positioned on the outer surface of the first spray head, the insufficient heat absorption caused by the heat contained in the air is effectively compensated, and when the air flows in the pipe body of the protective pipe group positioned on the outer surface of the second spray head, the reverse heat conduction phenomenon at the second spray head and the problem of reverse cooling of the front end opening of the second spray head can be avoided.)

1. The utility model provides a gas mixing type is anti-backfire device for combustor, includes shell (1), its characterized in that: the inner chamber of the shell (1) is fixedly provided with a mixing tube cavity (2), one side of the mixing tube cavity (2) is fixedly provided with a combustion cavity (3) which is positioned in an inner cavity of the shell (1), the inner cavity of the mixing tube cavity (2) is fixedly provided with four hydrogen tubes (4), the inner side of each hydrogen tube (4) is fixedly provided with four natural gas tubes (5) which are positioned in the middle of the inner cavity of the mixing tube cavity (2), one end of each hydrogen tube (4) is fixedly provided with a first spray head (6), one end of each natural gas tube (5) is fixedly provided with a second spray head (7), the outer part of each first spray head (6) is fixedly provided with a protective tube group (8) which is positioned outside the second spray head (7), one end of each protective tube group (8) is fixedly provided with a pressurizing air pump (9), and the top end of each pressurizing air pump (9) is fixedly provided with a shunt tube (10), the one end fixed mounting of shunt tubes (10) has gas-supply pipe (11), the top fixed mounting of gas-supply pipe (11) has transmission pipe (12), the top fixed mounting of transmission pipe (12) has aspirator pump (13), the other end fixed mounting of protection nest of tubes (8) has recovery air supplement pipe (14) that are located combustion chamber (3) inner chamber middle part.

2. The anti-backfire apparatus for gas-mixed type burner as claimed in claim 1, wherein: the shape of shower nozzle (6) is conical, the shape of No. two shower nozzles (7) is cylindrical, the body length value of shower nozzle (6) is unanimous with the body length value of No. two shower nozzles (7), the export mouth of pipe diameter value of shower nozzle (6) is the third of the export mouth of pipe diameter value of No. two shower nozzles (7).

3. The anti-backfire apparatus for gas-mixed type burner as claimed in claim 1, wherein: protection nest of tubes (8) are the helix shape, and even winding is respectively on the surface of shower nozzle (6) and No. two shower nozzles (7), the body diameter of protection nest of tubes (8) is along with rotatory direction change that progressively goes forward in proper order, is located the body diameter value size of the protection nest of tubes (8) of the surface of shower nozzle (6), and degressive in proper order along with the direction of rotation, is located the body diameter value size of the protection nest of tubes (8) of the surface of No. two shower nozzles (7), increases gradually along with the direction of rotation.

4. The anti-backfire apparatus for gas-mixed type burner as claimed in claim 1, wherein: the shape of gas-supply pipe (11) is the ring shape, the bottom of gas-supply pipe (11) and the junction of shunt tubes (10), both link up each other.

5. The anti-backfire apparatus for gas-mixed type burner as claimed in claim 1, wherein: the recovery air supply pipe (14) is cylindrical, one end surface of the recovery air supply pipe (14) is communicated with one end opening of the protection pipe group (8), and holes are formed in the other end surface of the recovery air supply pipe (14) and are uniformly distributed in a circumferential mode.

Technical Field

The invention relates to the technical field of heat energy engineering, in particular to an anti-backfire device for a gas mixing type burner.

Background

The burner is a device which can spray fuel and air in a certain mode and can be used for mixed combustion, the existing burner mostly adopts gas mixed combustion, generally adopts the mixing of natural gas and hydrogen, the working principle of the burner is that the mixed gas of the natural gas and the hydrogen is sent into a mixing pipe by utilizing a related air pressure device and then is sprayed out through a nozzle, so that the mixed gas enters a combustion cavity or a flame path for combustion.

For the existing burner, because hydrogen has a higher flame propagation speed than natural gas, when the mixed gas of the natural gas and the hydrogen is combusted in the inner cavity of the burner, namely the combustion cavity, the tempering phenomenon is very easy to occur, if the inside of the burner is tempered, the gas injection device is burnt, so that the deformation is generated, meanwhile, the burner is caused to generate detonation sound, noise is generated, and explosion accidents can also occur in severe cases.

Disclosure of Invention

Aiming at the defects of the existing gas mixing type burner in the background technology in the using process, the invention provides the anti-backfire device for the gas mixing type burner, which has the advantages of effectively preventing the backfire phenomenon at the combustion cavity and ensuring that the air injection device is not burnt, and solves the technical problems in the background technology.

The invention provides the following technical scheme: an anti-backfire device for a gas mixing type burner comprises a shell, wherein a mixing tube cavity is fixedly arranged at one end of an inner cavity of the shell, a combustion cavity positioned in the inner cavity of the shell is fixedly arranged at one side of the mixing tube cavity, four hydrogen tubes are fixedly arranged in the inner cavity of the mixing tube cavity, four natural gas tubes positioned in the middle of the inner cavity of the mixing tube cavity are fixedly arranged at the inner sides of the four hydrogen tubes, a first spray head is fixedly arranged at one end of each hydrogen tube, a second spray head is fixedly arranged at one end of each natural gas tube, a protection tube group positioned outside the second spray head is fixedly arranged at the outer part of the first spray head, a pressurizing air pump is fixedly arranged at one end of the protection tube group, a flow dividing tube is fixedly arranged at the top end of the pressurizing air pump, a gas pipe is fixedly arranged at one end of the flow dividing tube, a transmission pipe is fixedly arranged at the top end of the gas pipe, and an air suction pump is fixedly arranged at the top end of the transmission pipe, and the other end of the protection pipe group is fixedly provided with a recovery air supplement pipe positioned in the middle of the inner cavity of the combustion chamber.

Preferably, the shape of a shower nozzle is conical, the shape of No. two shower nozzles is cylindrical, the body length value of a shower nozzle is unanimous with the body length value of No. two shower nozzles, the export mouth of pipe diameter value of a shower nozzle is the third of the export mouth of pipe diameter value of No. two shower nozzles.

Preferably, the protection nest of tubes is the helix, evenly twines respectively on the surface of a shower nozzle and No. two shower nozzles, the body diameter of protection nest of tubes is along with rotatory direction change that goes forward in proper order, is located the body diameter value size of the protection nest of tubes of the surface of a shower nozzle, and is steadilyd decrease in proper order along with the direction of rotation, is located the body diameter value size of the protection nest of tubes of the surface of No. two shower nozzles, and is progressively increased in proper order along with the direction of rotation.

Preferably, the shape of gas-supply pipe is the ring shape, the bottom of gas-supply pipe and the junction of shunt tubes, both link up each other.

Preferably, the recovery air supplement pipe is cylindrical, one end surface of the recovery air supplement pipe is communicated with one end opening of the protection pipe group, and holes are formed in the other end surface of the recovery air supplement pipe and are uniformly distributed in a circumferential shape.

The invention has the following beneficial effects:

1. the invention uses the air suction pump to suck the outside air, then uses the transmission of the transmission pipe and the gas transmission pipe, and uses the pressurization of the pressurization gas pump to make the air form air current to flow into the pipe of the protection pipe group, and uses the flow of low-temperature air in the protection pipe group to cool the first spray head, when the hydrogen gas flows from the inner cavity of the hydrogen pipe to the first spray head, the temperature of the hydrogen gas is reduced, according to the characteristic that the flame propagation speed is influenced by the temperature, when the hydrogen gas is sprayed out from the first spray head, the temperature is lower, the flame propagation speed is reduced, at the same time, the heat energy absorbed by the air flowing through the surface of the first spray head heats and conducts the second spray head, the temperature contained in the second spray head is effectively increased, the temperature of the natural gas flowing to the second spray head is increased, when the natural gas is sprayed out from the second spray head, the flame propagation speed is increased, the flame propagation speed difference between the natural gas and the hydrogen gas is reduced, effectively preventing the natural gas and the hydrogen from generating a tempering phenomenon when being burnt in the combustion chamber.

2. According to the invention, by designing the pipe body diameter value of the protection pipe group to be changed in a progressive manner, when air flows in the pipe body of the protection pipe group positioned on the outer surface of the first spray head, the pipe body diameter of the protection pipe group is smaller, the cross section of the protection pipe group is smaller, the air flow speed is higher, and when the air flows to the rear end of the first spray head, more heat energy is carried from the surface of the first spray head to the air at a high flow speed due to higher flow speed, so that the insufficient heat absorption caused by the heat contained in the air is effectively compensated.

3. According to the invention, by designing the progressive change of the diameter value of the tube body of the protection tube group, when air flows in the tube body of the protection tube group positioned on the outer surface of the second spray head, the air flows at a higher speed at the rear end of the second spray head due to the increasing diameter of the tube body of the protection tube group, and at the front end of the second spray head, the air flows at a lower speed, the air is in shorter contact time with the rear end of the second spray head, the heat conduction efficiency is lower, the heat energy lost by the air is less, the contact time of the air with the front end of the second spray head is longer, the heat conduction efficiency is higher, and at the moment, the heat energy contained in the air is still higher than the heat energy contained in the second spray head, so that the problems of reverse heat conduction at the second spray head and reverse cooling of the front end opening of the second spray head can be avoided.

Drawings

FIG. 1 is a schematic sectional elevation view of the structure of the present invention;

FIG. 2 is a schematic side sectional view of the structure of the present invention;

FIG. 3 is a schematic top view of the structure of the present invention.

In the figure: 1. a housing; 2. a mixing lumen; 3. a combustion chamber; 4. a hydrogen pipe; 5. a natural gas pipe; 6. a first spray head; 7. a second spray head; 8. a protective tube set; 9. a pressurized air pump; 10. a shunt tube; 11. a gas delivery pipe; 12. a conveying pipe; 13. a getter pump; 14. and recovering the air supply pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, an anti-backfire device for a gas mixing type burner comprises a housing 1, a mixing tube cavity 2 is fixedly installed at one end of an inner cavity of the housing 1, a combustion cavity 3 located in the inner cavity of the housing 1 is fixedly installed at one side of the mixing tube cavity 2, four hydrogen tubes 4 are fixedly installed in the inner cavity of the mixing tube cavity 2, four natural gas tubes 5 located in the middle of the inner cavity of the mixing tube cavity 2 are fixedly installed at the inner sides of the four hydrogen tubes 4, a first spray head 6 is fixedly installed at one end of each hydrogen tube 4, a second spray head 7 is fixedly installed at one end of each natural gas tube 5, a protection tube group 8 located outside the second spray head 7 is fixedly installed at the outside of the first spray head 6, a pressurizing air pump 9 is fixedly installed at one end of the protection tube group 8, a shunt tube 10 is fixedly installed at the top end of the pressurizing air pump 9, a gas tube 11 is fixedly installed at one end of the shunt tube 10, and a transmission tube 12 is fixedly installed at the top end of the shunt tube 11, the top end of the transmission pipe 12 is fixedly provided with an air suction pump 13, the other end of the protection pipe group 8 is fixedly provided with a recovery air supplement pipe 14 positioned in the middle of the inner cavity of the combustion cavity 3, the outside air is sucked by the air suction pump 13, then the air is transmitted by the transmission pipe 12 and the air pipe 11, the air forms air flow to flow into the pipe of the protection pipe group 8 through the pressurization of the pressurization air pump 9, the air flows along with the pipe body of the protection pipe group 8 continuously, the temperature of the hydrogen is reduced when the hydrogen flows to the first spray head 6 from the inner cavity of the hydrogen pipe 4 because the surface temperature of the first spray head 6 is higher than the outside air temperature and then the flow of low-temperature air, the temperature of the first spray head 6 is reduced, and according to the characteristic that the flame propagation speed is influenced by the temperature, when the hydrogen is sprayed from the first spray head 6, the temperature is lower, the flame propagation speed is reduced, and at the same time, the air that flows through a shower nozzle 6 surface contains heat energy conduction and carries the downstream with a shower nozzle 6, flow to No. two shower nozzle 7's surface, the air that contains the high temperature flows along with the body of the surrounding type of protection nest of tubes 8, the absorptive heat energy of air heats the conduction to No. two shower nozzle 7 departments, effectively increase No. two shower nozzle 7 and contain the temperature, cause to flow to No. two shower nozzle 7's natural gas temperature rise, then when the natural gas is from No. two shower nozzle 7 departments blowout, its flame propagation speed improves, then the flame propagation speed difference of natural gas and hydrogen reduces, effectively prevent when natural gas and hydrogen are at 3 inside combustions in combustion chamber, take place the tempering phenomenon.

Referring to fig. 1-2, wherein the first nozzle 6 is conical, the second nozzle 7 is cylindrical, the length of the first nozzle 6 is equal to the length of the second nozzle 7, and the diameter of the first nozzle 6 is one third of the diameter of the second nozzle 7, by changing the shape of the first nozzle 6, the nozzle is far smaller than the nozzle of the second nozzle 7, when hydrogen is sprayed from the nozzle of the first nozzle 6, the gas outlet speed is higher, the flame propagation speed of the hydrogen is higher, and thus the occurrence of the backfire phenomenon is further prevented.

Referring to fig. 1-2, wherein the protection tube set 8 is spiral and is respectively and uniformly wound on the surface of the first nozzle 6 and the second nozzle 7, the diameter of the protection tube set 8 sequentially changes along with the rotation direction, the diameter of the protection tube set 8 on the outer surface of the first nozzle 6 decreases along with the rotation direction, the diameter of the protection tube set 8 on the outer surface of the second nozzle 7 increases along with the rotation direction, the heat dissipation from the surface of the first nozzle 6 and the heat conduction from the surface of the second nozzle 7 are uniform by designing the protection tube set 8 as a spiral tube, when the air flows downward along with the tube of the protection tube set 8 and flows around from the front end of the first nozzle 6, i.e. the open end of the first nozzle 6, at this time, the air heat dissipation efficiency is highest, and when the air flows along the tube to the rear end of the first nozzle 6, namely, when the first nozzle 6 is connected with the hydrogen pipe 4, the heat dissipation efficiency is weakened because the air conducts and carries part of high temperature when the air conducts and dissipates the heat of the first nozzle 6 at the front end, namely, when the air conducts and dissipates the heat of the first nozzle 6 at the rear end, namely, the heat dissipation efficiency is weakened, namely, when the protective pipe group 8 conducts air flowing and dissipates the heat of the first nozzle 6, the air which absorbs heat energy continuously moves downwards and circularly along the pipe body of the protective pipe group 8, the heat conduction efficiency is the highest when the air flows and conducts heat to the rear end of the second nozzle 7, namely, the end where the second nozzle 7 is connected with the natural gas pipe 5, the heat energy contained in the air is the highest, and the heat conduction efficiency is the best, when the air flows to the front end of the second nozzle 7 along the pipe body, namely, the open end of the second nozzle 7, because the air conducts heat to the second nozzle 7 at the rear end, namely, the heat energy of the second nozzle 7 at the front end is lost, and then conducts heat to the second nozzle 7 at the front end, the heat energy of the air may be lower than the heat energy contained in the second nozzle 7, so that the heat conduction phenomenon is avoided, and the opening of the second nozzle 7 is cooled.

To sum up, by designing the tube diameter value of the protection tube group 8 to be changed in a progressive manner, when air flows in the tube of the protection tube group 8 located on the outer surface of the first nozzle 6, the tube diameter of the protection tube group 8 is smaller and smaller, the cross section of the protection tube group 8 is smaller and smaller, and the air flow speed is faster and faster, when the air flows to the rear end of the first nozzle 6, the air flows to the rear end of the second nozzle 7, because the flow speed is faster, the high flow speed is relatively higher, more heat energy is carried from the surface of the first nozzle 6 to the air, and the insufficient heat absorption caused by the heat of the air is effectively compensated, when the air flows in the tube of the protection tube group 8 located on the outer surface of the second nozzle, because the tube diameter of the protection tube group 8 is larger and larger, the air flows faster at the rear end of the second nozzle 7, and when the front end of the second nozzle 7, the air flow speed is slower, the contact time of the air with the rear end of the second nozzle 7 is shorter, the heat conduction efficiency is lower, the heat energy lost by the air is less, the contact time of the air and the front end of the second spray head 7 is longer, the heat conduction efficiency is higher, and at the moment, the heat energy contained in the air is still higher than the heat energy contained in the second spray head 7, so that the problems that the heat conduction phenomenon occurs at the second spray head 7 and the front end opening of the second spray head 7 is cooled reversely can be avoided.

Referring to fig. 1, the gas pipe 11 is circular, and the bottom end of the gas pipe 11 is connected to the shunt pipe 10, and the two are communicated with each other.

Referring to fig. 2-3, the recovery air supply pipe 14 is cylindrical, one end surface of the recovery air supply pipe 14 is communicated with one end opening of the protection pipe group 8, the other end surface of the recovery air supply pipe 14 is provided with holes, the holes are uniformly distributed in a circumferential shape, the recovery air supply pipe 14 is arranged to recover air used for heat dissipation or heat conduction in the protection pipe group 8, and the air flows into the inner cavity of the combustion cavity 3 through the holes, so that combustible gas can be timely supplied to the inner cavity of the combustion cavity 3, and the degree of flame combustion in the combustion cavity 3 is effectively enhanced.

The using method of the invention has the following working principle:

the outside air is continuously sucked into the transmission pipe 12 through the air suction pump 13, the air is transmitted to the inside of the air transmission pipe 11 through the transmission pipe 12 and flows into the inner cavity of the pressurization air pump 9 through the shunt pipe 10, and the air forms air flow with certain pressure flow velocity through the pressurization of the pressurization air pump 9 and flows into the pipe of the protection pipe group 8.

The air current is along with the body of protection nest of tubes 8, constantly flow on the surface of shower nozzle 6, cool down shower nozzle 6 No. one, make its contained temperature drop, when hydrogen flows to shower nozzle 6 from the inner chamber of hydrogen pipe 4, the temperature that the hydrogen receives reduces, its flame propagation speed drops, simultaneously, the air flowing through shower nozzle 6 surface conducts and carries the heat energy that No. one shower nozzle 6 contains, flow down to the surface of No. two shower nozzles 7, the air that contains the high temperature heats conduction to No. two shower nozzles 7, effectively increase the temperature that No. two shower nozzles 7 contain, cause the natural gas temperature that flows to No. two shower nozzles 7 to rise, when the natural gas is spout from No. two shower nozzles 7, its flame propagation speed improves, then the flame propagation speed difference of natural gas and hydrogen reduces, prevent effectively that natural gas and hydrogen from burning when the chamber 3 is inside, take place the tempering phenomenon.

When the air flows out of the pipe orifice of the protective pipe group 8, the air flows into the inner cavity of the recovery air supplement pipe 14 and is recovered in a centralized manner, and then flows into the inner cavity of the combustion cavity 3 through the surface opening of the recovery air supplement pipe 14, so that the combustible gas is timely supplemented to the inner cavity of the combustion cavity 3, and the degree of flame combustion in the combustion cavity 3 is effectively enhanced.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.