CN217032657U - Take amount of wind measuring device's combustor air supply system - Google Patents
Take amount of wind measuring device's combustor air supply system Download PDFInfo
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- CN217032657U CN217032657U CN202220985911.4U CN202220985911U CN217032657U CN 217032657 U CN217032657 U CN 217032657U CN 202220985911 U CN202220985911 U CN 202220985911U CN 217032657 U CN217032657 U CN 217032657U
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Abstract
The utility model discloses a burner air supply system with an air quantity measuring device, which comprises an air supply fan, wherein an air inlet of the air supply fan is communicated with an air supply pipeline, the air quantity measuring device is arranged on the air supply pipeline and comprises a measuring pipe, a high-pressure annular manifold, a low-pressure annular manifold, a high-pressure communicating pipe, a low-pressure communicating pipe, a differential pressure gauge and a connecting pipe, and the measuring pipe consists of an inlet cylindrical pipe section, a conical contraction pipe section, a throat straight pipe section and a conical diffusion pipe section which are sequentially connected end to end; and when the burner is in operation, the air quantity can be monitored in real time, time delay does not exist, and the tempering risk when the premixing burner is debugged is avoided.
Description
Technical Field
The utility model relates to the technical field of design and manufacture of a burner air supply system, in particular to a burner air supply system with an air quantity measuring device, which is used in the field of industrial burners.
Background
In the actual use of the current industrial burner, the actual air supply rate and the chemical equivalence ratio are calculated by directly measuring the oxygen content in the flue gas discharged by combustion through chemical reaction instruments such as a zirconia inductor, and the like, and the defects of the method are as follows: the zirconia inductor belongs to a consumable product, needs to be replaced regularly, and has high cost; the problem of time delay exists in calculating the air-air ratio through the oxygen content in the flue gas, and the tempering risk exists when the premixing burner is debugged. Therefore, a durable, safe and reliable burner air supply system of the air quantity measuring device is needed.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides a burner air supply system with an air quantity measuring device.
In order to achieve the purpose, the technical scheme adopted by the utility model for solving the technical problem is as follows: a burner air supply system with an air quantity measuring device comprises an air supply machine, wherein an air inlet of the air supply machine is communicated with an air supply pipeline, the air quantity measuring device is arranged on the air supply pipeline and comprises a measuring pipe, a high-pressure annular manifold, a low-pressure annular manifold, a high-pressure communicating pipe, a low-pressure communicating pipe, a differential pressure gauge and a connecting pipe, the measuring pipe is formed by sequentially connecting an inlet cylindrical pipe section, a conical contraction pipe section, a throat straight pipe section and a conical diffusion pipe section end to end, a plurality of high-pressure tapping interfaces are distributed on the outer side wall of the cylindrical pipe section in the middle of the inlet cylindrical pipe section at equal intervals in the circumferential direction, and each high-pressure tapping interface is respectively communicated with the high-pressure annular manifold through the connecting pipe; the outer side wall of the straight pipe section positioned at the throat part is provided with a plurality of low-pressure-taking interfaces at equal intervals in the circumferential direction, each low-pressure-taking interface is also communicated with the low-pressure annular manifold through a connecting pipe, and the differential pressure gauge is connected with the high-pressure annular manifold and the low-pressure annular manifold through a high-pressure communicating pipe and a low-pressure communicating pipe.
The cone angle of the conical contraction pipe section of the burner air supply system with the air volume measuring device is 20 degrees, the pipe diameter of the throat straight pipe section is 7/25 of the pipe diameter of the inlet cylindrical pipe section, the axial length of the throat straight pipe section is equal to the pipe diameter of the throat straight pipe section, and the cone angle of the conical diffusion pipe section is 10 degrees.
The utility model provides a burner air supply system with an air quantity measuring device.A first manual air valve is arranged between a high-pressure communicating pipe and a high-pressure annular manifold; and a second manual air valve is arranged between the low-pressure communicating pipe and the low-pressure annular header.
According to the burner air supply system with the air volume measuring device, the number of the high-pressure taking interfaces is equal to that of the low-pressure taking interfaces and is 8.
The utility model provides a burner air supply system with an air quantity measuring device, wherein an access flange is arranged at a connecting port of an inlet cylindrical pipe section, and an access flange is arranged at a connecting port of a conical diffusion pipe section.
The utility model further provides a combustor air supply system with an air volume measuring device, wherein two lifting lugs are arranged above a measuring tube and are respectively fixedly welded on the outer side wall of an inlet cylinder tube section and the outer side wall of a conical diffusion tube section.
The utility model has the beneficial effects that: the air supply system of the burner with the air quantity measuring device can preset the air supply quantity of each load point through the measurement of the air quantity measuring device before the burner is ignited; and when the burner is in operation, the air quantity can be monitored in real time, no time delay exists, and the tempering risk when the premixing burner is debugged is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.
FIG. 1 is a schematic view of the present invention applied to an industrial burner;
FIG. 2 is a front view structural view of the air volume measuring device of the present invention;
FIG. 3 is a perspective view of the air volume measuring device according to the present invention;
in the figure: 100. an air volume measuring device; 101. an inlet cylindrical tube section; 102. a conical convergent section; 103. a throat flat pipe section; 104. a conical diffuser section; 105. a low-pressure-taking interface; 106. a high-pressure-taking interface; 107. a differential pressure gauge; 108. a high pressure annular manifold; 109. a low pressure annular manifold; 110. a high-pressure communicating pipe; 111. a low-pressure communicating pipe; 112. a connecting pipe; 113. connecting a flange plate; 114. connecting a flange plate; 115. lifting the hanging lug; 116. a first manual air valve; 117. a second manual air valve; 201. an air supply duct; 211. a fan; 212. a combustion chamber.
Detailed Description
The preferred embodiments of the present invention will now be described in conjunction with the detailed description, with the understanding that the preferred embodiments described herein are intended to illustrate and explain the present invention and are not intended to limit the utility model.
As shown in fig. 1, fig. 2, and fig. 3, the burner air supply system with an air volume measuring device includes an air supply fan 211, an air inlet of the air supply fan 211 is communicated with an air supply pipeline 201, the air volume measuring device 100 is disposed on the air supply pipeline 201, the air volume measuring device 100 includes a measuring tube, a high-pressure annular manifold 108, a low-pressure annular manifold 109, a high-pressure communicating tube 110, a low-pressure communicating tube 111, a differential pressure gauge 107, and a connecting tube 112, the measuring tube is formed by sequentially connecting an inlet cylindrical tube section 101, a conical contraction tube section 102, a throat straight tube section 103, and a conical diffusion tube section 104 end to end, a plurality of high-pressure tapping connectors 106 are circumferentially disposed at equal intervals on an outer side wall of a cylindrical tube section located in the middle of the inlet cylindrical tube section 101, and each high-pressure tapping connector 106 is communicated with the high-pressure annular manifold 108 through the connecting tube 112; the outer side wall of the straight pipe section of the throat straight pipe section 103 is circumferentially provided with a plurality of low-pressure-taking ports 105 at equal intervals, each low-pressure-taking port 105 is also communicated with a low-pressure annular manifold 109 through a connecting pipe 112, and the differential pressure gauge 107 is respectively connected with a high-pressure annular manifold 108 and the low-pressure annular manifold 109 through a high-pressure communicating pipe 110 and a low-pressure communicating pipe 111.
The taper angle of the conical contraction pipe section 102 is 20 degrees, the pipe diameter of the throat straight pipe section 103 is 7/25 of the pipe diameter of the inlet cylindrical pipe section 101, the axial length of the throat straight pipe section 103 is equal to the pipe diameter of the throat straight pipe section, and the taper angle of the conical diffusion pipe section 104 is 10 degrees.
A first manual air valve 116 is arranged between the high-pressure communicating pipe 110 and the high-pressure annular header 108; a second manual air valve 117 is provided between the low-pressure communication pipe 111 and the low-pressure annular header 109. The first manual air valve 116 and the second manual air valve 117 are mainly arranged for convenient installation and debugging.
The quantity of high pressure interface 106 equals and the quantity of low pressure interface 105 is 8, in order to make the measurement structure more accurate in this embodiment, has adopted 8 high pressure interfaces 106 and 8 low pressure interfaces 105, can go to do the adjustment that corresponds according to the difference of pipe diameter size, nevertheless for making measured data's accuracy, the quantity of high pressure interface 106 and the quantity of low pressure interface 105 should not be less than 3.
The connecting port of the inlet cylindrical pipe section 101 is provided with an access flange 113, and the connecting port of the conical diffusion pipe section 104 is provided with an access flange 114. The access flange 113 and the exit flange 114 are intended to facilitate a tight but rigid interface with the supply duct 201.
Two lifting lugs 115 are also arranged above the measuring pipe and are respectively fixedly welded on the outer side wall of the inlet cylindrical pipe section 101 and the outer side wall of the conical diffusion pipe section 104. The air volume measuring device 100 is mainly convenient to hoist and mount.
The measurement principle is as follows: the basic measurement principle of the air quantity measuring device is a flow measuring method based on an energy conservation law-Bernoulli equation and a flow continuity equation. Before the burner is ignited, the differential pressure of the straight throat pipe section 103 and the cylindrical inlet pipe section 101 is measured through a differential pressure gauge 107, the differential pressure is substituted into an energy conservation law-Bernoulli equation and a flow continuity equation, the air supply quantity of each load point is calculated, and a specific application mathematical model is as follows:
setting:
the air flow rate of the inlet cylindrical pipe section 101 is v1；
Static pressure of the inlet cylindrical pipe section 101 is p1；
Cross-sectional area S of inlet cylindrical tube section 1011；
The air flow velocity of the throat flat pipe section 103 is v2；
Static pressure of the throat flat tube section 103 is p2；
Cross sectional area S of throat flat tube section 1032；
The gas density is ρ;
it can be derived that:
Q＝V1S1＝V2S2
wherein: p is total pressure
From this, the formula for the flow Q can be derived:
p according to the gas density; cross-sectional area S of inlet cylindrical tube section 1011(ii) a And the static pressure of the inlet cylindrical pipe section 101 is measured as p1Minus the static pressure of the straight throat section 103 to p2(ii) a The difference between the two can be used to determine the flow rate Q according to the above equation.
In the embodiment, the wind and gas distribution ratio is as follows according to the volume ratio of 10: 1, proportioning, and accurately setting a wind-gas proportioning curve in a program controller according to the requirement of ignition gas flow of each load; during the operation of the burner, the air quantity is calculated through the real-time collected measurement data of the differential pressure gauge, and the air and gas ratio can be adjusted in real time by matching with the gas flow at the point.
Specifically, the method for adjusting the air volume is controlled by adjusting the opening of an air door of the air supply fan 211, adjusting a frequency converter of a motor, and the like.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A burner air supply system with an air quantity measuring device comprises an air supply fan (211), an air inlet of the air supply fan (211) is communicated with an air supply pipeline (201), it is characterized in that an air quantity measuring device (100) is arranged on the air supply pipeline (201), the air volume measuring device (100) comprises a measuring pipe, a high-pressure annular manifold (108), a low-pressure annular manifold (109), a high-pressure communicating pipe (110), a low-pressure communicating pipe (111), a differential pressure gauge (107) and a connecting pipe (112), the measuring tube is formed by sequentially connecting an inlet cylindrical tube section (101), a conical contraction tube section (102), a throat straight tube section (103) and a conical diffusion tube section (104) end to end, a plurality of high-pressure tapping connectors (106) are circumferentially distributed on the outer side wall of the cylindrical tube section positioned in the middle of the inlet cylindrical tube section (101) at equal intervals, each high-pressure-taking interface (106) is respectively communicated with a high-pressure annular header (108) through a connecting pipe (112); the outer side wall of the straight pipe section of the throat portion (103) is provided with a plurality of low-pressure taking ports (105) at equal intervals in the circumferential direction, each low-pressure taking port (105) is also communicated with a low-pressure annular manifold (109) through a connecting pipe (112), and the differential pressure gauge (107) is connected with the high-pressure annular manifold (108) and the low-pressure annular manifold (109) through a high-pressure communicating pipe (110) and a low-pressure communicating pipe (111).
2. The burner air supply system with the air volume measuring device is characterized in that the conical angle of the conical contraction pipe section (102) is 20 degrees, the pipe diameter of the throat straight pipe section (103) is 7/25 of the pipe diameter of the inlet cylinder pipe section (101), the axial length of the throat straight pipe section (103) is equal to the pipe diameter of the throat straight pipe section, and the conical angle of the conical diffusion pipe section (104) is 10 degrees.
3. The burner air supply system with the air volume measuring device is characterized in that a first manual air valve (116) is arranged between the high-pressure communicating pipe (110) and the high-pressure annular header pipe (108); and a second manual air valve (117) is arranged between the low-pressure communicating pipe (111) and the low-pressure annular header (109).
4. The burner air supply system with the air volume measuring device according to claim 2 or 3, wherein the number of the high-pressure taking interfaces (106) is equal to the number of the low-pressure taking interfaces (105) and is 8.
5. The burner air supply system with the air volume measuring device is characterized in that an inlet flange (113) is arranged at the connecting port of the inlet cylindrical pipe section (101), and an outlet flange (114) is arranged at the connecting port of the conical diffusion pipe section (104).
6. The burner air supply system with the air volume measuring device is characterized in that two lifting lugs (115) are arranged above the measuring pipe and are fixedly welded on the outer side wall of the inlet cylindrical pipe section (101) and the outer side wall of the conical diffusion pipe section (104) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220985911.4U CN217032657U (en) | 2022-04-26 | 2022-04-26 | Take amount of wind measuring device's combustor air supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220985911.4U CN217032657U (en) | 2022-04-26 | 2022-04-26 | Take amount of wind measuring device's combustor air supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217032657U true CN217032657U (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220985911.4U Active CN217032657U (en) | 2022-04-26 | 2022-04-26 | Take amount of wind measuring device's combustor air supply system |
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- 2022-04-26 CN CN202220985911.4U patent/CN217032657U/en active Active
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