CN110779029A - Torch capable of enhancing structural stability of burner - Google Patents

Abstract

The invention provides a torch capable of enhancing the structural stability of a combustor, which comprises a skid-mounted outer frame and an injection type combustion device arranged in the skid-mounted outer frame, wherein the injection type combustion device comprises a protective cover and a combustion system, the combustion system comprises a plurality of Venturi combustors, a flame cavity for surrounding flame is formed on the inner side of the protective cover, the injection type combustion device comprises a combustor fixing structure, and the Venturi combustors are fixed to the skid-mounted outer frame through the combustor fixing structure.

Description

Torch capable of enhancing structural stability of burner

Technical Field

The application relates to the field of torches, in particular to a torch capable of enhancing structural stability of a combustor.

Background

In a petrochemical device, the emptying torch system can timely treat redundant, harmful and unbalanced waste gas discharged in a production device, can treat unqualified gas generated during test run and start and stop, and can instantly discharge a large amount of gas during accidents, thereby ensuring the normal and safe operation of the device. The venting flare system generally employs an injection type combustion device, which includes a plurality of venturi burners for combusting the gas. According to the arrangement mode and the combination mode of the injection type combustion device, the plurality of venturi combustors are usually connected and fixed with a gas pipeline, or are connected and fixed with a protective cover, or are connected and fixed together, but the fixing modes usually have the risk of falling, and potential safety hazards are caused.

Disclosure of Invention

In view of the above, the present invention provides a torch capable of enhancing structural stability of a burner.

The invention provides a torch capable of enhancing the structural stability of a combustor, which comprises a skid-mounted outer frame and an injection type combustion device arranged in the skid-mounted outer frame, wherein the injection type combustion device comprises a protective cover and a combustion system, the combustion system comprises a plurality of Venturi combustors, a flame cavity for surrounding flame is formed on the inner side of the protective cover, the injection type combustion device comprises a combustor fixing structure, and the Venturi combustors are fixed to the skid-mounted outer frame through the combustor fixing structure.

In one embodiment, the venturi burners are detachably fixed to the skid-mounted frame by the burner fixing structure.

In an embodiment, the venturi combustor includes a nozzle and a mixing tube, the mixing tube has an air inlet portion for injecting air and an outlet portion for outputting mixed gas, the nozzle is disposed in the air inlet portion, a plurality of mixing tubes are disposed along a horizontal direction and stacked and enclosed in a vertical direction to form at least a portion of the protective cover, a plurality of flame holes are opened on an inner side surface of the mixing tube facing the flame chamber, and the plurality of flame holes form the outlet portion.

In one embodiment, the torch is of a square structure, a plurality of mixing pipes are arranged on four side walls of the torch, each side wall is formed by stacking the mixing pipes in the vertical direction, and each layer of any side wall is formed by connecting two mixing pipes side by side.

In an embodiment, each of the mixing pipes is provided with at least one burner fixing structure, and the at least one burner fixing structure is fixedly connected to the skid-mounted outer frame.

In one embodiment, two burner fixing structures are arranged on each mixing tube, one burner fixing structure is arranged at one end of each mixing tube close to the air inlet part, and the other burner fixing structure is arranged at one end of each mixing tube far away from the air inlet part.

In one embodiment, the burner fixing structure is a fixing plate, the fixing plate comprises a first sheet and a second sheet which are integrally connected and perpendicular to each other, the first sheet is fixed to the mixing pipe, and the second sheet is detachably connected and fixed to the skid-mounted outer frame.

In an embodiment, the skid-mounted frame is a square structure, include with four frame montants of torch axial direction parallel, connect a plurality of frame horizontal poles between two adjacent frame montants, it is a plurality of the venturi combustor is located wherein two between the frame horizontal pole, it is equipped with three longitudinal rods to connect between two frame horizontal poles, two hybrid tubes of any one layer of arbitrary lateral wall of torch, the combustor fixed knot that portion one end was admitted air separately that this two hybrid tubes kept away from is connected and is fixed extremely the both sides of the middle longitudinal rod of three longitudinal tubes, the combustor fixed knot that one of them hybrid tube is close to its portion one end of admitting air is connected and is fixed extremely one of them side longitudinal rod of three longitudinal rod, wherein another hybrid tube is close to its portion one end of admitting air the combustor fixed knot of one end is connected and is fixed extremely one of them another side longitudinal rod of three.

In one embodiment, the combustion system comprises a plurality of independently-installed burner assemblies which are arranged along the vertical direction, each burner assembly comprises a plurality of venturi burners, and a plurality of outer frame cross rods are arranged between the plurality of burner assemblies, so that each burner assembly is positioned between two outer frame cross rods.

In one embodiment, the mixing tube is a square tube with a converging mixing section and a diverging mixing section in communication within the square tube.

In summary, the present application provides a torch that can enhance the structural stability of the burner. Set up combustor fixed knot structure between a plurality of venturi combustors and sled dress frame, combustor fixed knot structure is connected a plurality of venturi combustors and is fixed to sled dress frame to the steadiness of reinforcing venturi combustor. Combustor fixed knot constructs for example for fixing two stationary blades on each venturi combustor, sets up specially on sled dress frame and is used for supplying the stationary blade to connect a plurality of longitudinal rods fixed, and two stationary blades are connected fixedly respectively during the installation, for example through screwed connection fixed to corresponding longitudinal rod on to it is fixed with being connected of sled dress frame to realize the venturi combustor. Thus, each burner can be stably positioned regardless of whether the injection type combustion apparatus is in a vertical orientation or a horizontal orientation.

Drawings

FIG. 1 is a schematic perspective view of a torch according to the present invention.

FIG. 2 is a top view of the torch of FIG. 1.

FIG. 3 is an enlarged partial schematic view of the venturi burner of FIG. 1 attached to a skid-mounted frame.

FIG. 4 is a side cross-sectional view of the single venturi burner of FIG. 1.

Detailed Description

Before the embodiments are described in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of embodiments in other forms of implementation. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," "having," and the like, herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. In particular, when "a certain element" is described, the present invention is not limited to the number of the element being one, and may include a plurality of the elements.

In the present specification and claims, the description is given when the injection type combustion apparatus is placed vertically (in a normal use state), and therefore, a large number of terms in the vertical direction and the horizontal direction are used herein with reference to the vertical placement state. It can be understood that the injection type combustion device of the present application can be laid down (for example, during transportation), and at this time, the above directional terms should be understood by rotating 90 degrees.

As shown in fig. 1-4, the present application provides a torch 10 capable of enhancing structural stability of a burner, the torch 10 includes an outer frame 12, an injection type combustion device installed in the outer frame 12, and an overhaul platform 14 disposed outside the outer frame 12, the outer frame 12 can be used as a skid-mounted outer frame 12, so as to solve the transportation and fixing problems of the torch 10 at low cost. The injection type combustion device comprises a protective cover 16, a combustion system and a fuel gas control unit 18. The combustion system comprises a number of venturi burners 20 for burning the gas to be burnt. The gas control unit 18 includes a control unit and various valves and pipes, and is configured to perform a staged treatment on the gas to be treated, and deliver the treated gas to the combustion system for combustion. In the illustrated embodiment, the control unit is disposed within the skid housing 12 at the bottom of the flare 10, and a number of venturi burners 20 are connected to the gas control unit 18 by gas supply lines to receive the gas to be treated.

The shield 16 comprises a top shield unit and at least one bottom shield unit located below the top shield unit, the inside of the shield 16 forming a flame chamber 22 for enclosing flames. In this embodiment, the torch 10 has a rectangular shape, so the pry-mounting frame 12 and the shield 16 also have a rectangular shape, and the shield 16 has upper and lower openings in the vertical direction. Each venturi burner 20 has an air inlet portion 20a for injecting air and an outlet portion 20b for outputting mixed gas, and each venturi burner 20 includes a nozzle 24 and a mixing pipe 26, and the mixing pipe 26 is, for example, a square pipe. The nozzle 24 is disposed in the gas inlet portion 20a, the mixing pipes 26 form at least a part of the protective cover 16, for example, all the mixing pipes 26 form a bottom protective cover unit of the protective cover 16, the mixing pipes 26 are opened with flame holes on an inner side surface facing the flame chamber 22, and the flame holes form an outlet portion 20b for outputting the mixed gas.

In other words, the mixing tube 26 is not only part of the shroud 16, but is also a mixing carrier for the venturi burner 20. This kind of design is integrated to a side's siphunculus with the shrink mixing section and the diffusion mixing section of traditional venturi combustor in, has reduced and has arranged the space requirement, saves a wall section of thick bamboo, can enlarge the size of protection casing moreover, enlarges the flame district, increases torch combustion space, has reduced the inside heat intensity that holds in flame district, can effectively reduce flame length, burning noise. As shown in fig. 3, the mixing pipe 26 is a rectangular pipe having a rectangular parallelepiped structure as a whole, and inner plates 50 are provided on at least two opposite inner side walls of the mixing pipe 26 on the side of the air inlet portion 20 a. In the illustrated embodiment, the inner plates 50 are provided on the four inner side walls of the mixing pipe 26 on the side of the intake portion 20 a. The inner plates 50 on every two opposite inner side walls of the inner plates 50 on the four inner side walls are inwards bent towards each other to form bent plates, so that each inner plate 50 comprises a first bent part 50a and a second bent part 50b, a contraction mixing section is formed between the four first bent parts 50a, a diffusion mixing section is formed between the four second bent parts 50b, and a space part of one side, far away from the air inlet part 20a, of the inner plate 50 forms a premixing section, thereby forming a Venturi structure. The end of the inner plate 50 facing the air inlet 20a is connected to the end of the mixing tube 26, the outlet 20b is disposed on the inner wall of the mixing tube 26 on the side of the premixing section, the head of the nozzle 24 extends into the convergent mixing section, and when the nozzle 24 injects the gas, air is injected into the mixing tube 26 from the air inlet 20 a.

It should be understood that the inner plates 50 are disposed on four inner sidewalls of the mixing pipe 26 on the side of the air inlet 20a in the above embodiments, and in other embodiments, other embodiments are also possible according to specific design requirements, for example, the inner plates 50 are disposed on two opposite inner sidewalls of the mixing pipe 26 on the side of the air inlet 20a, and the two inner plates 50 on the two opposite inner sidewalls are bent oppositely.

In the illustrated embodiment, the lances 52 are mounted within the flame ports such that the lances 52 project from the inner wall surface of the mixing tube 26. This arrangement can keep the flame away from the inner wall surface of the mixing pipe 26, and avoid damage to the inner wall surface.

As shown in FIG. 1, a number of mixing tubes 26 are disposed on all four sidewalls of the torch 10. More specifically, each of the four side walls is formed by stacking a plurality of mixing pipes 26 in the vertical direction, the number of the stacking of the mixing pipes 26 in each side wall is the same, and the mixing pipes 26 are arranged in the horizontal direction and are uniformly aligned in the vertical direction. Wherein, each layer of any side wall is formed by connecting two mixing pipes 26 side by side, the connecting end of the two mixing pipes 26 is closed, the other end of the mixing pipe 26 opposite to the connecting end is an open structure, and the nozzle 24 is arranged at the open structure. This arrangement allows the number of venturi burners 20 to be significantly increased and the size and power of a single venturi burner 20 can be significantly reduced for the same amount of gas to be processed, thereby significantly reducing noise and flame length.

Of the four side walls of the torch 10, the flame holes on two opposite side walls jet the flame oppositely, and the flame holes on the other two opposite side walls jet the flame oppositely. For example, all the mixing tubes 26 on two opposite sidewalls are respectively disposed oppositely, and the flame holes on the mixing tubes 26 on two opposite sidewalls are respectively corresponding in position, so that during combustion, the flame holes on two opposite sidewalls form a pair spray. The flame can inhibit the spraying length of the flame of the other side in the opposite spraying, and prevent the flame from extending to contact with the opposite wall surface, so that the temperature of the wall cylinder exceeds the standard and the color is changed.

The nozzle 24 sprays fuel gas and injects air into the mixing pipe 26 for mixing, and then the mixed gas enters the flame cavity 22 from the flame holes for combustion. The design enables the injection type combustion device to inject air in a larger range, on one hand, the number of the burners can be obviously increased, the insufficient air injection amount of each burner is avoided, the mixed gas is injected and combusted from a plurality of flame holes, the flame is uniformly distributed on the inner wall surface of the protective cover formed by the whole mixing pipe 26, and the combustion flame is relatively shorter; on the other hand, at the periphery of the protection cover 16 formed by the mixing pipes 26, due to the injection action of the venturi burner 20, besides a part of peripheral air is injected into the venturi burner 20 to participate in combustion, a large amount of peripheral cold air can be led to the outside of the protection cover 16, that is, if the outer side of the mixing pipes 26 moves, so that the heat of the mixing pipes 26 is dissipated. The mixed gas flows through the inside of the mixing pipe 26, and the heat radiation effect of the protection mask 16 itself can be further enhanced.

Since the flame is larger at the top of the shield 16, the shield 16 also includes a top shield unit 28 at the top of the torch in order to shield the flame. The top cover unit 28 comprises a number of tubes stacked in a vertical direction and enclosing to form a top cover unit 28 open at both upper and lower ends. The plurality of pipes are square straight-through pipes 30, for avoiding and releasing the spray pipes, the top shield unit 28 further comprises a plurality of inclined pipes 32 and a metal plate 34 which are arranged at least one corner of four corners of the top shield unit 28, a through hole 38 is arranged on the metal plate 34, the plurality of inclined pipes 32 and the metal plate 34 are connected between the straight-through pipes 30 at two adjacent sides of the at least one corner, and the metal plate 34 is positioned above the plurality of inclined pipes 32. The corner position of the jet pipe does not need to be avoided, and inclined pipes and metal plates do not need to be arranged, the straight-through pipes 30 on the two sides of the corner position can be directly connected or can be connected through inclined pipes, and the straight-through pipes are connected through the inclined pipes 32.

From another perspective, the top cover unit 28 is composed of eight parts, including four sets of side units on four side walls, respectively, and four sets of corner units connected at four corner positions of the four sets of side units, wherein each side unit includes a plurality of straight-through tubes 30 stacked in the vertical direction, the corner units at diagonal positions where the blow-off pipes are disposed include a plurality of inclined tubes 32 stacked in the vertical direction and metal plates 34 located above the inclined tubes 32, and the corner units at diagonal positions where the blow-off pipes are not disposed include a plurality of inclined tubes 32 stacked in the vertical direction. In the illustrated embodiment, the straight-through tubes 30 of each side unit are connected at opposite ends to two vertical rods 40 for connecting and fixing the straight-through tubes 30, and the vertical rods 40 are connected at opposite ends to the skid-mounted frame 12 for fixing the side unit and thus the entire top cover unit 28. Each vertical post 40 is located outside of the corner element of the down tube 32 and the metal plate 34 or the corner element of the down tube 32.

In the present application, the injection type combustion apparatus further includes two blowout pipes 36, and in the illustrated embodiment, the two blowout pipes 36 are connected to the gas control unit 18, so as to solve the problem that the gas flow exceeds the standard, and the blowout pipes 36 are used for temporary discharge. Two blowout pipes 36 are respectively arranged in a relative angle position in the skid-mounted outer frame 12, and the outlet ends of the blowout pipes 36 are arranged through the through holes 38 of the metal plate 34, so that the outlet ends of the blowout pipes 36 are positioned in the flame cavity 22.

Because the nozzle 24 is arranged at the end part of the mixing pipe 26 facing to the flare corner, the adjacent two mixing pipes 26 cannot be directly connected, in order to avoid the blowout pipe 36, the adjacent two mixing pipes 26 at four included angles in the skid-mounted outer frame 12 are connected by the inclined plate 37, the nozzle 24 and the blowout pipe 36 are both positioned outside the inclined plate 37, and the nozzle 24 is connected with the air supply pipeline. Thus, in this embodiment, the shield 16 includes four side walls of several mixing tubes 26, four inclined plates 37, and a top shield unit 28. The inclined plate 37 may be a single piece or may be formed by stacking a plurality of inclined pipes in the vertical direction.

The service platform 14 is installed outside the skid frame 12, for example, at the bottom of the top guard unit 28, and in other embodiments, the service platform 14 may be installed at other positions on the skid frame 12 according to actual requirements. The service platform 14 is detachably mounted to the skid-mounted frame 12, for example, detachably fixed by screws, so that the service platform 14 can be independently disassembled and transported.

In the illustrated embodiment, the service platform 14 includes a base plate 42, a safety rail 44 mounted on the outside of the base plate 42, and diagonal braces 46 disposed at the bottom of the base plate 42. The bottom plate 42 is formed by connecting and assembling a plurality of sub-plates 48, such as welding, and the sub-plates 48 are mesh plates for the maintenance personnel to stand. The end of the diagonal bracing 46 is provided with a mounting plate 58, and the mounting plate 58 is provided with a plurality of screw holes, so that the mounting plate 58 can be fixed to the skid-mounted outer frame 12 by screws passing through the screw holes.

In the illustrated embodiment, the maintenance platform 14 is disposed around three sides of the skid-mounted outer frame 12, so that the maintenance platform 14 can be divided into three detachable parts, including a first maintenance platform part, a second maintenance platform part and a third maintenance platform part, and the second maintenance platform part is connected between the first maintenance platform part and the third maintenance platform part, so that the disassembly, assembly and transportation of the maintenance platform 14 can be facilitated. The three parts of the maintenance platform 14 can be assembled and spliced by arranging the plugboard and the plughole.

To facilitate the ascent of the service person onto the service platform 14, at least one of the sub-panels 48 is configured as a flap panel that is pivotally connected to the sub-panel 48 adjacent thereto. In this embodiment, the flip plate is disposed at one end of the second repair platform portion connected to the third repair platform portion. The flap is pivotally connected to the end of the sub-plate 48 adjacent thereto by a pivot shaft, and the width of the flap is smaller than the width of the sub-plate 48 adjacent thereto, so as to prevent the flap from hitting the safety fence 44 when it is turned. The bottom of flip board is provided with the cat ladder to supply the maintainer climbing.

The injection type combustion device comprises a combustor fixing structure, and the venturi combustors 20 are fixed to the skid-mounted outer frame 12 through the combustor fixing structure. Preferably, the plurality of venturi burners 20 are removably secured to the skid frame 12 by burner securing structure. Each Venturi burner 20 is equipped with at least one burner attachment structure, in this embodiment, two burner attachment structures, such as a stator 54, are provided for each Venturi burner 20. One of the stators 54 is disposed at an end of the mixing tube 26 proximate the intake portion 20a, and the other stator 54 is disposed at an end of the mixing tube 26 distal from the intake portion 20 a. The fixing piece 54 includes a first piece 54a and a second piece 54b that are integrally connected and perpendicular to each other, the first piece 54a is fixed to a side wall of the mixing pipe 26 on a side facing the pry-mounting frame 12, for example, by welding, and the second piece 54b is detachably connected and fixed to the pry-mounting frame 12, for example, by screws.

The prying outer frame 12 comprises four outer frame vertical rods 68 which are axially parallel to the torch 10, and a plurality of outer frame cross rods 70 are connected between every two adjacent outer frame vertical rods 68. In the illustrated embodiment, for either side, the frame rail 70 includes a top rail 70a and a bottom rail 70b connected to the ends of the frame vertical rails 68, and a first intermediate rail 70c, a second intermediate rail 70d, a third intermediate rail 70e, and a fourth intermediate rail 70f arranged in that order from the top rail 70a to the bottom rail 70 b. Three longitudinal rods 72 parallel to the outer frame vertical rods 68 are connected between the first middle cross rod 30c and the fourth middle cross rod 70f, and each longitudinal rod 72 comprises a middle longitudinal rod 72a positioned in the middle of the outer frame cross rod 70 and side longitudinal rods 72b respectively positioned on two sides of the middle longitudinal rod 72 a. Three longitudinal bars 72 are provided through the second and third intermediate transverse bars 70d, 70 e.

The top canopy unit 28 is positioned between the top crossbar 70a and the first middle crossbar 70c, the combustion system is positioned between the first middle crossbar 70c and the fourth middle crossbar 70f, and the gas control unit 18 is positioned between the fourth middle crossbar 70f and the bottom crossbar 70 b.

In the illustrated embodiment, the bottom of the top enclosure unit 28 rests upon and is secured to the upper surface of the first intermediate rail 70c, and the top of the top enclosure unit 28 is fixedly attached to the inside surface of the top rail 70 a.

In the illustrated embodiment, the combustion system includes a plurality of individually mountable combustor assemblies. Because the number of the Venturi combustors 20 is large, the combustion system is modularized, the installation efficiency can be improved to a large extent, the assembly is convenient, and the disassembly, the maintenance and the replacement are convenient when the Venturi combustors 20 or the protective cover 16 have faults.

As shown in fig. 1, the venturi combustors 20 of the combustion system may be divided into three groups of combustor assemblies arranged in a vertical direction, including a first combustor assembly 20a, a second combustor assembly 20b, and a third combustor assembly 20c, each of which may be individually assembled. The first burner assembly 20a is positioned between the first central crossbar 70c and the second central crossbar 70d, the second burner assembly 20b is positioned between the second central crossbar 70d and the third central crossbar 70e, and the third burner assembly 20c is positioned between the third central crossbar 70e and the fourth central crossbar 70 f. The second middle cross bar 70d and the third middle cross bar 70e can play a role in increasing the structural strength of the longitudinal bar 72, so that the structural strength of the skid-mounted outer frame 12 is enhanced, and the connection structure of the burner and the skid-mounted outer frame 12 is more stable.

All of the venturi burners 20 may be fixedly attached to the skid frame 12. Specifically, all of the venturi burners 20 may be fixedly connected to the longitudinal rods 72. For two venturi burners 20 of any one layer on any one side of the three sets of venturi burners, the fixing pieces 54 of the two mixing pipes 26 of the two venturi burners 20 on the side of the connecting end are respectively fixedly connected to both sides of the middle longitudinal rod 72a, and the fixing pieces 54 of the two mixing pipes 26 on the side of the respective air inlet ends are respectively fixedly connected to the corresponding side longitudinal rods 72 b. For example, the second sheet 54b is abutted against the side edge of the corresponding longitudinal rod, a screw hole is provided at the corresponding position of the second sheet 54b and the corresponding longitudinal rod 72a, and the second sheet 54b is fixed to the corresponding longitudinal rod 72a by using a screw, so that the connection and fixation between all the venturi burners 20 and the skid-mounted frame 12 are realized.

In summary, the present application provides a torch that can enhance the structural stability of the burner. Set up combustor fixed knot structure between a plurality of venturi combustors and sled dress frame, combustor fixed knot structure is connected a plurality of venturi combustors and is fixed to sled dress frame to the steadiness of reinforcing venturi combustor. Combustor fixed knot constructs for example for fixing two stationary blades on each venturi combustor, sets up specially on sled dress frame and is used for supplying the stationary blade to connect a plurality of longitudinal rods fixed, and two stationary blades are connected fixedly respectively during the installation, for example through screwed connection fixed to corresponding longitudinal rod on to it is fixed with being connected of sled dress frame to realize the venturi combustor. Thus, each burner can be stably positioned regardless of whether the injection type combustion apparatus is in a vertical orientation or a horizontal orientation.

The concepts described herein may be embodied in other forms without departing from the spirit or characteristics thereof. The particular embodiments disclosed should be considered illustrative rather than limiting. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. Any changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. The utility model provides a can strengthen torch of combustor structure steadiness, the torch include the sled dress frame and install in injection type burner in the sled dress frame, injection type burner includes protection casing and combustion system, combustion system includes a plurality of venturi combustors, the inboard formation of protection casing is used for surrounding the flame chamber of flame, its characterized in that, injection type burner includes combustor fixed knot structure, a plurality of venturi combustors pass through combustor fixed knot constructs fixed extremely the sled dress frame.

2. A torch capable of enhancing structural stability of burners as recited in claim 1, wherein said plurality of venturi burners are removably secured to said skid frame by said burner securing structure.

3. A torch capable of enhancing structural stability of a burner as defined in claim 1, wherein the venturi burner comprises a nozzle and a mixing tube, the mixing tube has an air inlet portion for injecting air and an outlet portion for outputting mixed gas, the nozzle is disposed at the air inlet portion, a plurality of mixing tubes are disposed in a horizontal direction and stacked in a vertical direction and surround at least a portion of the shield, a plurality of flame holes are opened on an inner side surface of the mixing tube facing the flame chamber, and the plurality of flame holes form the outlet portion.

4. A torch as defined in claim 3, wherein the structural stability of the burner is enhanced, the torch is of a square structure, a plurality of mixing tubes are arranged on four side walls of the torch, each side wall is formed by stacking a plurality of mixing tubes in a vertical direction, and each layer of any side wall is formed by connecting two mixing tubes side by side.

5. A torch capable of enhancing structural stability of a burner as defined in claim 4, wherein each mixing tube is provided with at least one burner fixing structure, and the at least one burner fixing structure is fixedly connected to the skid-mounted frame.

6. A torch capable of enhancing structural stability of a burner as defined in claim 5, wherein there are two burner fixing structures on each mixing tube, one burner fixing structure being disposed at an end of the mixing tube near the gas inlet portion, and the other burner fixing structure being disposed at an end of the mixing tube far from the gas inlet portion.

7. A torch capable of enhancing structural stability of a burner as defined in claim 6, wherein the burner fixing structure is a fixing plate comprising a first plate and a second plate integrally connected and perpendicular to each other, the first plate being fixed to the mixing tube, and the second plate being detachably connected and fixed to the skid-mounted frame.

8. A torch capable of enhancing structural robustness of the burner as recited in claim 7, the skid-mounted outer frame is of a square structure and comprises four outer frame vertical rods which are axially parallel to the torch, a plurality of outer frame cross rods are connected between every two adjacent outer frame vertical rods, a plurality of Venturi burners are positioned between two outer frame cross rods, three longitudinal rods are connected between the two outer frame cross rods, two mixing pipes of any layer of any side wall of the torch are arranged, the burner fixing structures at the ends of the two mixing pipes far away from the respective air inlet parts are connected and fixed to the two sides of the middle longitudinal rod of the three longitudinal pipes, one end of the mixing pipe close to the air inlet part of the mixing pipe is fixedly connected with one side longitudinal rod of the three longitudinal rods, and the burner fixing structure at one end of the other mixing pipe close to the air inlet part of the other mixing pipe is fixedly connected to the longitudinal rod at the other side of the three longitudinal rods.

9. A torch for increasing the structural stability of a burner as defined in claim 8, in which said combustion system comprises a plurality of vertically aligned and individually mountable burner assemblies, each of said burner assemblies comprising a plurality of Venturi burners, and a plurality of said outer frame rails disposed between said plurality of burner assemblies such that each of said burner assemblies is disposed between two outer frame rails.

10. A torch capable of enhancing structural stability of a burner as recited in claim 3, wherein the mixing tube is a square tube having a converging mixing section and a diverging mixing section communicating therein.

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