CN110748883A

CN110748883A - Venturi combustor structure

Info

Publication number: CN110748883A
Application number: CN201911194885.2A
Authority: CN
Inventors: 王志强; 刘继思; 曹晶; 刘津池
Original assignee: Wisdom Energy Technology Co Ltd
Current assignee: Wisdom Energy Technology Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-02-04

Abstract

The invention provides a Venturi combustor structure which comprises a nozzle and a mixing pipe, wherein the mixing pipe is provided with an air inlet part for ejecting air and an outlet part for outputting mixed gas, the nozzle is arranged at the air inlet part, a plurality of flame holes are arranged on one side surface of the mixing pipe, the plurality of flame holes form the outlet part, a contraction structure is arranged in the mixing pipe, and the contraction structure is constructed to enable a contraction mixing section with gradually reduced cross-sectional area and a diffusion mixing section with gradually enlarged cross-sectional area to be formed in the mixing pipe.

Description

Venturi combustor structure

Technical Field

The application relates to the field of combustors, in particular to a novel venturi combustor structure.

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. Traditional venturi combustor is bulky, mostly arranges for along vertical direction, and is higher to arranging the space requirement, increases the volume of whole torch. And the outer wall of the traditional Venturi combustor changes due to the change of the Venturi structure, so that the outer shape of the traditional Venturi combustor is irregular, the installation and the fixation are very inconvenient, and the stability of the installed Venturi combustor is poor.

Disclosure of Invention

In view of the above, the present invention provides a new venturi burner structure.

In one embodiment, the contraction structure is made by a sheet metal machining process.

In one embodiment, the mixing tube is square.

In one embodiment, the constriction is an inner plate disposed on at least one of the opposing inner sidewalls of the mixing tube.

In one embodiment, the inner plate is bent inward, such that the inner plate includes a first bent portion and a second bent portion, the first bent portions on the at least one pair of inner sidewalls form the shrinkage mixing section therebetween, and the second bent portions on the at least one pair of inner sidewalls form the diffusion mixing section therebetween.

In one embodiment, the inner plate is disposed at an end of the mixing tube facing the air intake portion, and the head of the nozzle extends into the convergent-mixing section.

In one embodiment, a premixing section is formed on one side of the mixing pipe far away from the inner plate, and the plurality of flame holes are arranged on one side surface of the premixing section of the mixing pipe.

In one embodiment, a nozzle is arranged in the flame holes.

In one embodiment, the inner plate is formed by bending a straight plate and welding.

In one embodiment, a burner fixing structure is arranged on one side surface of the mixing pipe opposite to the side surface where the flame holes are arranged, and the burner fixing structure is used for fixing the venturi burner to a fixing structure.

To sum up, the present application provides a novel venturi combustor structure, including nozzle and hybrid tube, the hybrid tube is square siphunculus for example, sets up the constriction structure in the hybrid tube, and the constriction structure constructs to form the convergent mixing section of cross sectional area convergent and the diffusion mixing section of cross sectional area divergent in making the hybrid tube. The contraction structure is an inner plate processed by a sheet metal processing technology, the inner plate can be processed into the structure with two bending parts by adopting a straight plate bending and welding forming mode, the inner plate can be directly welded to the inner wall of the air inlet part of the mixing pipe, the processing method is simplified, and the cost is reduced. Can set up the inner panel on two relative inside walls or the four sides inside wall of square siphunculus, neotype square venturi structural design, the performance accords with the venturi structure, and is square convergent divergent structure. The Venturi combustor can be horizontally arranged and installed, the square flat outer wall is convenient for the combined installation and fixation of the combustor, the structural stability is enhanced, the structure is simple, and the realization is easy.

Drawings

FIG. 1 is a perspective view of the venturi burner configuration of the present invention.

FIG. 2 is a perspective sectional view of the venturi burner structure of FIG. 1.

FIG. 3 is a side cross-sectional view of the venturi burner structure 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.

As shown in fig. 1-3, the present application provides a novel venturi burner structure, which includes a nozzle 12 and a mixing tube 14, wherein the mixing tube 14 has a structure with an open end and a closed end, the mixing tube 14 has an air inlet portion 16 for injecting air and an outlet portion 18 for outputting mixed gas, and the air inlet portion 16 is disposed at the open end of the mixing tube 14. A plurality of flame holes 20 are formed in one side surface of the mixing tube 14, and the plurality of flame holes 20 form the outlet portion 18 of the mixing tube 14. A constriction structure is arranged in the mixing tube 14, and the constriction structure is configured to form a constriction mixing section with gradually reduced cross-sectional area and a diffusion mixing section with gradually enlarged cross-sectional area in the mixing tube 14, so that the mixing tube 14 forms a gradually-reducing and gradually-enlarging Venturi structure.

The space between the constriction within the mixing tube 14 and the closed end of the mixing tube 14 forms a premixing section 22, and the outlet portion 18 is disposed on the side wall of the mixing tube 14 in the premixing section 22. The design integrates the contraction mixing section and the diffusion mixing section of the traditional Venturi combustor into a mixing pipe, reduces the requirement on arrangement space, and can effectively reduce the length of flame and the combustion noise.

In this embodiment, the mixing tube 14 is a square tube with a rectangular parallelepiped structure, and the contraction structure is an inner plate 24 disposed on at least one of the two opposite inner side walls of the mixing tube 14. In the illustrated embodiment, the constriction is an inner plate 24 disposed on four inner side walls within the mixing tube 14, the inner plates 24 on each of the opposing inner side walls of the four inner side walls 24 being bent inwardly toward each other to form a bent plate, such that each inner plate 24 includes a first bent portion 24a and a second bent portion 24 b. The four first bent portions 24a form a convergent-divergent mixing section 26, the four second bent portions 24b form a divergent mixing section 28, the four inner plates 24 form a throat portion 30 between the bent portions, and the inner plates 24 form a premix section 22 in the space portion away from the air inlet portion 16, thereby forming a square venturi structure design, i.e., the performance of the square venturi structure design is in accordance with the venturi structure design.

In this embodiment, the inner plate 24 is formed by a sheet metal process, and the straight plate is bent and welded. The inner plate 24 may be welded directly within the mixing tube 14 by welding, for example, the end of the inner plate 24 facing the air intake 16 is welded to the inside of the end of the mixing tube 14 and the end of the inner plate 24 remote from the air intake 16 is welded to the inside wall of the mixing tube 14. The outlet part 18 is arranged on the upper end wall surface of the mixing pipe 14 which is positioned at the premixing section 22 and close to the closed end side of the mixing pipe, the head part of the nozzle 12 extends into the contraction mixing section 26, the end of the nozzle 12 opposite to the head part is connected to the air supply pipeline 23, and when the nozzle 12 sprays fuel gas, air is injected into the mixing pipe 14 from the air inlet part 16 at the open end.

It should be understood that the inner plates 24 are disposed on four inner side walls of the mixing pipe 14 on the side of the air intake portion 16 in the above embodiments, and in other embodiments, other embodiments are also possible according to specific design requirements, for example, the inner plates 24 are disposed on two opposite inner side walls of the mixing pipe 14 on the side of the air intake portion 16, and the two inner plates 24 on the two opposite inner side walls are bent oppositely.

In the illustrated embodiment, the plurality of flame ports have respective lances 32 mounted therein such that the lances 32 project above the upper end wall of the mixing tube 14. The arrangement enables the flame to be far away from the upper end wall surface of the mixing pipe 14, avoids damage to the upper end wall surface, and prolongs the service life of the mixing pipe 14.

The mixing tube 14 is provided with burner attachment structure on a side opposite the side where the flame holes 20 are provided, the burner attachment structure being used to attach the venturi burner to a fixed structure. In the illustrated embodiment, the burner mounting structure is two fixing plates 34 disposed on the lower end face of the mixing tube 14, one of the fixing plates 34 being disposed at an end of the mixing tube 14 near the intake portion 16, and the other fixing plate 34 being disposed at an end of the mixing tube 14 near the closed end thereof.

In the injection type combustion device, a skid-mounted outer frame can be arranged outside the injection type combustion device so as to facilitate the fixing and transportation of the injection type combustion device. Thus, the fixing piece 34 can be designed as a first piece 34a and a second piece 34b that are integrally connected and perpendicular to each other, the first piece 34a being fixed to the side wall of the mixing tube 14 on the side facing the skid frame, for example, by welding, and the second piece 34b being detachably connected to the skid frame, for example, by screws.

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

1. The utility model provides a venturi combustor structure, includes nozzle and hybrid tube, the hybrid tube has the export portion that is used for drawing the inlet portion of penetrating the air and exports the mist, the nozzle sets up the inlet portion, be equipped with a plurality of flame holes on a side of hybrid tube, a plurality of flame holes form export portion, its characterized in that, be equipped with constriction structure in the hybrid tube, constriction structure constructs to make form the convergent mixing section that cross sectional area reduces gradually and the diffusion mixing section that cross sectional area enlarges gradually in the hybrid tube.

2. The venturi burner structure of claim 1, wherein the constricting structure is formed using a sheet metal working process.

3. The venturi burner structure of claim 1, wherein the mixing tube is square.

4. The venturi burner structure of claim 3, wherein the constriction is an inner plate disposed on at least one of the opposing inner sidewalls of the mixing tube.

5. The venturi burner structure of claim 4, wherein the inner plate is bent inward such that the inner plate includes a first bend and a second bend, the convergent-divergent mixing section is formed between the first bends on the at least one opposing inner sidewalls, and the divergent mixing section is formed between the second bends on the at least one opposing inner sidewalls.

6. The venturi burner structure of claim 5, wherein the inner plate is disposed within the mixing tube at an end facing the air intake portion, and a head of the nozzle extends into the converging mixing section.

7. The venturi burner structure of claim 6, wherein a side of the mixing tube distal from the inner plate forms a premixing section, and the plurality of flame holes are disposed on a side of the mixing tube on the premixing section.

8. The venturi burner structure of claim 7, wherein a nozzle is disposed within the plurality of flame holes.

9. The venturi burner structure of claim 5, wherein the inner plate is formed by bending a straight plate and welding.

10. The venturi burner structure of claim 1, wherein a burner securing structure is disposed on a side of the mixing tube opposite the flame holes, the burner securing structure for securing the venturi burner to a securing structure.