WO2016154980A1

WO2016154980A1 - Burner for co-firing various fuels

Info

Publication number: WO2016154980A1
Application number: PCT/CN2015/075743
Authority: WO
Inventors: 王志强; 李宗洲; 杨瑞
Original assignee: 深圳智慧能源技术有限公司
Priority date: 2015-04-01
Filing date: 2015-04-01
Publication date: 2016-10-06

Abstract

Provided is a burner for co-firing various fuels, comprising a nozzle (2) and a Venturi tube (3); the nozzle (2) comprises a nozzle air intake end (4), a nozzle air outlet end (5), and a flow channel structure located between the air intake end (4) and the air outlet end (5); the Venturi tube (3) is provided with a Venturi tube air intake end; the nozzle air outlet end (5) is in fluid communication with the Venturi tube air intake end; the nozzle air intake end (4) is provided a plurality of nozzle air intake ports (7) in fluid communication with the flow channel structure; each of the nozzle air intake ports (7) is configured to be used for receiving a different fuel.

Description

Multi-fuel co-firing burner

Technical field

The present invention relates to a fuel burner, and more particularly to a multi-fuel co-firing burner.

Background technique

In the petrochemical plant, the venting flare system can process the excess, harmful and unbalanced exhaust gas discharged from the production device in time, and can handle the test vehicle, the unqualified gas generated during the parking, and the large amount of gas instantaneously released during the accident to ensure the device. Normal and safe operation. However, such a flare system has certain requirements for the air release body. For example, if the pressure or ignition of the venting air does not meet the requirements, the existing air defense flare system cannot be used for combustion.

technical problem

In view of this, a multi-fuel co-firing burner capable of solving at least one of the foregoing problems is proposed.

Technical solution

The invention provides a multi-fuel co-firing burner, comprising a nozzle and a venturi, the nozzle comprising a nozzle inlet end, a nozzle outlet end and a flow path structure between the nozzle inlet end and the nozzle outlet end The venturi tube is provided with a venturi inlet end, the nozzle outlet end is in fluid communication with the venturi inlet end, and the nozzle inlet end is provided with a fluid communication with the flow passage structure Each nozzle inlet is configured to receive a different fuel.

In an embodiment, the flow channel structure includes a plurality of independent flow channels, the number of the flow channels being equal to the number of the nozzle inlets, each of the flow channels and a corresponding nozzle inlet Connected, and each of the flow passages is provided with a nozzle outlet at the outlet end of the nozzle.

In an embodiment, the plurality of independent flow channels include a first flow path and a second flow path, the second flow path surrounding the first flow path as viewed from an end surface of the nozzle.

In one embodiment, the flow channel structure includes a mixing chamber and a flow passage in communication with the mixing chamber, the plurality of nozzle inlets are in communication with the mixing chamber, and the flow passage is vented at the nozzle The nozzle is provided with a nozzle outlet.

In an embodiment, the number of the flow channels is one.

In one embodiment, the nozzle includes a nozzle holder disposed at an inlet end of the nozzle and a nozzle tip coupled to the nozzle holder, the runner structure including a plurality of independent flow passages, each of the flow passages Communicating with a corresponding nozzle inlet, each of the flow passages including a first flow passage portion located in the nozzle holder and a second flow passage portion located inside the nozzle head, the first flow passage portion and the The second flow path portions are perpendicular to each other and communicated inside the nozzle.

In one embodiment, the nozzle includes a nozzle holder disposed at an inlet end of the nozzle and a nozzle tip coupled to the nozzle holder, the runner structure including a mixing chamber and a flow passage in communication with the mixing chamber, The plurality of nozzle inlets are all in communication with the mixing chamber, the flow channel is provided with a nozzle outlet at the outlet end of the nozzle, the mixing chamber is disposed in the nozzle holder, and the flow channel is disposed at Inside the nozzle head.

In an embodiment, the nozzle holder is integrally formed with the nozzle head.

In an embodiment, the nozzle holder and the nozzle head are separately formed and welded together.

In an embodiment, the nozzle holder is a rectangular parallelepiped.

Beneficial effect

In summary, the present invention provides a multi-fuel co-firing burner that employs different flow path structures, such as a plurality of independent flow paths, annular flow paths, and mixing chambers and flows. The combination of the channels allows different fuel gases to enter the venturi tube through separate flow channels and then mix them as needed, or they can be uniformly mixed into the venturi tube in the nozzle. This allows different fuels to be burned in one burner. In particular, when a fuel has insufficient ignition value to be combusted separately, it can be combusted with a fuel having a higher combustion value by the various fuel co-firing burners disclosed herein. Alternatively, when the pressure of one of the fuels is not satisfactory and cannot be separately burned by the burner, the multiple fuel co-firing burners disclosed in the present invention can be used to mix them with another fuel gas so that the pressure after mixing meets the requirements.

DRAWINGS

Figure 1 is a schematic perspective view of a co-firing burner.

Figure 2 is a schematic cross-sectional view of a nozzle having two separate flow paths.

Figure 3 is a top plan view of a nozzle having two separate flow channels.

Figure 4 is a top plan view of a nozzle having three separate flow paths.

Figure 5 is a schematic cross-sectional view of a nozzle having an annular flow path.

Figure 6 is a top plan view of a nozzle having an annular flow path.

Figure 7 is a schematic cross-sectional view of a nozzle having a mixing chamber.

Embodiments of the invention

Before the embodiments are described in detail, it is understood that the invention is not limited to the details The invention may be embodied in other ways. Also, it will be understood that the phraseology and terminology used herein are for the purpose of description The words "including", "comprising", "having", and <RTIgt; </ RTI> <RTIgt; </ RTI> used herein are meant to include the items listed thereafter, their equivalents, and other additional items. In particular, when describing "a certain element", the invention does not limit the number of the elements to one, and may include a plurality.

Figure 1 is a schematic perspective view of a co-firing burner. As shown in FIG. 1, a plurality of fuel co-firing burners include a nozzle 2 and a venturi tube 3. When the nozzle 2 injects the fuel gas into the venturi 3, the air around the intake end of the venturi 3 is introduced into the venturi 3 by the ejector to be mixed with the fuel gas. The nozzle 2 includes a nozzle inlet end, a nozzle outlet end, and a flow path structure between the nozzle inlet end and the nozzle outlet end.

2 is a schematic cross-sectional view of a nozzle having two independent flow passages in a flow path structure. The nozzle 2 includes a nozzle inlet end 4, a nozzle outlet end 5, and a flow path structure between the nozzle inlet end 4 and the nozzle outlet end 5. The nozzle inlet end 4 is provided with a plurality of nozzle inlets 7 in fluid communication with the above-described channel structure, each nozzle inlet 7 being configured to receive a different fuel.

The flow path structure comprises a plurality of independent flow paths 6, the number of said flow paths 6 being the same as the number of said nozzle inlet ports 7, and each flow path 6 is in communication with a corresponding nozzle inlet port 7, correspondingly Each of the flow passages 6 is provided with a corresponding nozzle air outlet 8 at the nozzle outlet end 5. In the illustrated embodiment, the runner structure includes two separate runners 6.

The nozzle 2 includes a nozzle holder 11 provided at the nozzle inlet end 4 and a nozzle head 12 connected to the nozzle holder 11, each of the flow passages 6 communicating with a corresponding nozzle inlet port 7, each of which includes a nozzle holder The first flow path portion 13 in the inside of the nozzle head 12 and the second flow path portion 14 in the inside of the nozzle head 12, wherein the first flow path portion 13 and the second flow path portion 14 are perpendicular to each other and communicate with the inside of the nozzle 2.

In an embodiment, the nozzle holder 11 is a rectangular parallelepiped. It should be understood that the nozzle holder 11 can also be embodied in other shapes, such as a cube and a cylinder, as long as it does not adversely affect the flow path communication within the nozzle 2.

Please refer to FIG. 3 and FIG. 4. FIG. 3 and FIG. 4 are schematic plan views of a nozzle having a plurality of independent flow channels. It can be seen from Figure 3 that there are two nozzle outlets 8, i.e., two separate flow passages, and Figure 4 has three nozzle outlets 8, i.e., three separate flow passages.

It should be understood that the present invention shows that the schematic diagram with two and three independent flow channels is merely exemplary, and the number of independent flow channels is not limited, and the number of independent flow channels may also be multiple, as long as the independent flow channels are satisfied. The number is equal to the number of nozzle inlets.

5 and 6 are schematic cross-sectional views of a nozzle having an annular flow path. As shown in FIG. 5, the flow path structure includes two independent flow paths, which are a first flow path 9 and a second flow path 10 respectively. The second flow path 10 surrounds the first flow path from a top cross-sectional view of the nozzle, that is, FIG. 9. The first flow passage 9 and the second flow passage 10 respectively pass different fuel gases.

It should be understood that the number of independent flow channels shown in the present invention is only two exemplary, but the present invention does not limit the number of independent flow channels, and the independent flow channels may also be multiple, such as three independent. The flow path is surrounded by as long as the number of independent flow channels is equal to the number of nozzle inlets.

7 is a side cross-sectional view of a nozzle having a mixing chamber. As shown in FIG. 7, the flow path structure includes a mixing chamber 15 and a flow passage 16 communicating with the mixing chamber 15, and the mixing chamber 15 is disposed in the nozzle holder 11, the flow passage 16 Disposed in the nozzle head 12, a plurality of nozzle inlets 7 are in communication with the mixing chamber 15, and the flow passage 16 is provided with a nozzle outlet 8 at the nozzle outlet end 5, in the illustrated embodiment, the nozzle inlet 7 The number is two, and the number of the flow passages 16 is one. Different fuel gases enter the mixing chamber 15 from the two nozzle inlets 7, respectively, and the mixed fuel gas flows out from the nozzle outlet 8 through the flow passage 16.

It should be understood that the present invention does not limit the number of nozzle air inlets 7 connected to the mixing chamber 15 to two, and the number of nozzle air inlets 7 connected to the mixing chamber 15 may be plural as needed. To meet the mixing of different fuel gases.

In an embodiment, the nozzle holder 11 is integrally formed with the nozzle tip 12. In another embodiment, the nozzle holder 11 and the nozzle tip 12 are separately formed and then welded together.

It should be noted that whether the nozzle 11 and the nozzle head 12 are integrally formed or separately molded and then welded together, the first flow path portion 13 and the second flow path portion 14 are not connected (as shown in FIG. 2). The configuration of the annular flow passage in the nozzle 2 (shown in FIG. 5) and the communication between the mixing chamber 15 and the flow passage 16 (as shown in FIG. 7) are affected.

The concepts described herein may be embodied in other forms without departing from the spirit and scope. The specific embodiments disclosed are to be considered as illustrative and not restrictive. Therefore, the scope of the invention is to be determined by the appended claims Any changes which come within the meaning and range of the claims are intended to be within the scope of the claims.

Claims

A multi-fuel co-firing burner comprising a nozzle and a venturi, the nozzle comprising a nozzle inlet end, a nozzle outlet end, and a runner structure between the nozzle inlet end and the nozzle outlet end, The venturi tube is provided with a venturi inlet end, and the nozzle outlet end is in fluid communication with the venturi inlet end, wherein the nozzle inlet end is in fluid communication with the flow passage structure A plurality of nozzle inlets, each nozzle inlet configured to receive a different fuel.
A multi-fuel co-fired burner according to claim 1 wherein said flow path structure comprises a plurality of independent flow paths, the number of said flow paths being equal to the number of said nozzle inlets, each One of the flow passages is in communication with a corresponding nozzle inlet, and each of the passages is provided with a nozzle outlet at the outlet end of the nozzle.
A multi-fuel co-fired burner according to claim 2, wherein said plurality of independent flow passages comprise a first flow passage and a second flow passage, said second flow viewed from an end surface of said nozzle The track surrounds the first flow path.
A multi-fuel co-fired burner according to claim 1 wherein said flow path structure comprises a mixing chamber and a flow passage in communication with said mixing chamber, said plurality of nozzle inlets being said The mixing chamber is in communication, and the flow passage is provided with a nozzle outlet at the outlet end of the nozzle.
A multi-fuel co-fired burner according to claim 4, wherein the number of said flow passages is one.
A multi-fuel co-fired burner according to claim 1 wherein said nozzle includes a nozzle holder disposed at an inlet end of said nozzle and a nozzle tip coupled to said nozzle holder, said runner structure comprising a plurality of independent flow passages, each of the flow passages being in communication with a corresponding nozzle inlet, each of the flow passages including a first flow passage portion located in the nozzle holder and a first portion located inside the nozzle head In the second flow path portion, the first flow path portion and the second flow path portion are perpendicular to each other and communicated inside the nozzle.
A multi-fuel co-fired burner according to claim 1 wherein said nozzle includes a nozzle holder disposed at an inlet end of said nozzle and a nozzle tip coupled to said nozzle holder, said runner structure comprising a mixing chamber and a flow passage communicating with the mixing chamber, wherein the plurality of nozzle inlets are in communication with the mixing chamber, and the flow passage is provided with a nozzle outlet at the outlet end of the nozzle, the mixing chamber is provided In the nozzle holder, the flow path is provided in the nozzle head.
A multi-fuel co-fired burner according to claim 6 or claim 7 wherein said nozzle holder is integrally formed with said nozzle head.
A multi-fuel co-fired burner according to claim 6 or claim 7 wherein said nozzle holder and said nozzle head are separately formed and welded together.
A multi-fuel co-fired burner according to claim 6 or 7, wherein the nozzle holder is a rectangular parallelepiped.