阅读说明：本技术 一种用于旋流燃烧器的风量测量装置及旋流燃烧器 (Air quantity measuring device for cyclone burner and cyclone burner ) 是由 薛晓垒 张雷 陈敏 王小华 梅振锋 陈宝康 赵俊武 李越 俞胜捷 彭小敏 刘瑞鹏 于 2021-09-28 设计创作，主要内容包括：本发明涉及一种用于旋流燃烧器的风量测量装置,包括开设有孔的第一环体、第二环体与测量孔内风压的测压部件,第一环体套在第二环体外,第一环体、第二环体之间形成风道,风道包括第一段、第二段,风道的第一段为直线段,风道的第二段的口径形成从大至小再至大的变化；一种旋流燃烧器,包括二次风进风管、风量测量装置,二次风进风管为环形管,二次风内管的外侧面上连接第二环体,二次风外管的内侧面上连接第一环体。本发明形状与旋流燃烧器二次风进风管相匹配,便于装置的安装,制造和维护成本低,便于大规模实施；设置有文丘里管的结构,可以精确测量旋流燃烧器二次风量,实现旋流燃烧器二次风量长期可靠、稳定、准确测量。(The invention relates to an air quantity measuring device for a cyclone burner, which comprises a first ring body with a hole, a second ring body and a pressure measuring component for measuring the air pressure in the hole, wherein the first ring body is sleeved outside the second ring body; a cyclone burner comprises a secondary air inlet pipe and an air quantity measuring device, wherein the secondary air inlet pipe is an annular pipe, a second ring body is connected to the outer side surface of a secondary air inner pipe, and a first ring body is connected to the inner side surface of a secondary air outer pipe. The shape of the invention is matched with the secondary air inlet pipe of the cyclone burner, thus being convenient for installation of the device, low in manufacturing and maintenance cost and convenient for large-scale implementation; the structure provided with the Venturi tube can accurately measure the secondary air quantity of the cyclone burner, and the secondary air quantity of the cyclone burner can be measured reliably, stably and accurately for a long time.)

1. The utility model provides an amount of wind measuring device for cyclone burner which characterized in that: the wind pressure measuring device comprises a first ring body, a second ring body and a pressure measuring component, wherein holes are formed in the first ring body and/or the second ring body, the pressure measuring component is used for measuring the pressure of wind in the holes, an inner convex part protruding out of the first ring body is formed on the inner circumferential surface of the first ring body, and/or an outer convex part protruding out of the second ring body is formed on the outer circumferential surface of the second ring body,

when the air duct is in use, the first ring body is sleeved on the outer side of the second ring body, an air duct is formed between the inner circumferential surface of the first ring body and the outer circumferential surface of the second ring body, the air duct comprises a first section and a second section, the first section of the air duct is a straight section, the caliber of the second section of the air duct is changed from large to small and then large due to the inner convex part of the first ring body and/or the outer convex part of the second ring body, and the holes comprise first holes formed in the first ring body and/or the second ring body of the first section of the air duct and second holes formed in the first ring body and/or the second ring body of the second section of the air duct.

2. The air volume measuring device for a cyclone burner as claimed in claim 1, wherein: the holes are formed in the first ring body and the second ring body, when the ring is in a use state, the holes in the first ring body are distributed on the upper semi-circumferential surface of the first ring body, and the holes in the second ring body are distributed on the lower semi-circumferential surface of the second ring body.

3. The air volume measuring device for a cyclone burner according to claim 1 or 2, wherein: the first ring body and the second ring body are provided with the first hole and the second hole.

4. The air volume measuring device for a cyclone burner as claimed in claim 3, wherein: the first holes and the second holes are respectively provided with a plurality of holes, and when the ring is in use, the included angles of the two adjacent first holes on the radial projection surfaces of the first ring body and the second ring body are equal; and included angles of the two adjacent second holes on the radial projection surfaces of the first ring body and the second ring body are equal.

5. The air volume measuring device for a cyclone burner as claimed in claim 3, wherein: a group of first holes and second holes is formed in the first ring body, and the first holes and the second holes in the group are distributed along the axial direction of the first ring body; a group of first holes and second holes is formed in the second ring body, and the first holes and the second holes in the group are distributed along the axial direction of the second ring body.

6. The air volume measuring device for a cyclone burner as claimed in claim 3, wherein: the device also comprises branch pipes and a main pipe, wherein the branch pipes are communicated with the holes, and the branch pipes communicated with the first holes are communicated with one main pipe; and the branch pipes communicated with the second holes are communicated with the other header pipe.

7. The air volume measuring device for a cyclone burner as claimed in claim 6, wherein: the first holes and the second holes are all provided with a plurality of rings, a plurality of ring pipes are respectively arranged in the first ring body around the axis of the first ring body and in the second ring body around the axis of the second ring body, the plurality of first holes of the first ring body, the plurality of second holes of the first ring body, the plurality of first holes of the second ring body and the plurality of second holes of the second ring body are respectively communicated with one ring pipe, the plurality of branch pipes are arranged, and one ring pipe is communicated with one branch pipe.

8. The air volume measuring device for a cyclone burner as claimed in claim 1, wherein: when in use, the first ring body and the second ring body are coaxially arranged; the first ring body and the second ring body are both circular rings.

9. The air volume measuring device for a cyclone burner as claimed in claim 1, wherein: the shape of the inner convex part of the first ring body is the same as that of the outer convex part of the second ring body.

10. A cyclone burner comprises a secondary air inlet pipe and is characterized by further comprising an air volume measuring device for the cyclone burner, the air volume measuring device is as claimed in any one of claims 1 to 9, the secondary air inlet pipe is an annular pipe and comprises a secondary air inner pipe and a secondary air outer pipe, the secondary air outer pipe is sleeved outside the secondary air inner pipe, the second ring body is connected to the outer side face of the secondary air inner pipe, and the first ring body is connected to the inner side face of the secondary air outer pipe.

Technical Field

The invention belongs to the field of combustion boilers, and particularly relates to an air quantity measuring device for a cyclone burner and the cyclone burner.

Background

The opposed firing boiler has the characteristics that the large-scale combustion is easier to realize due to the arrangement mode of the burners, and the like, and occupies a large proportion in domestic large coal-fired units. However, in the actual operation process, the problems of oxygen-deficient combustion of the combustor close to the side wall, high content of CO in flue gas, severe high-temperature corrosion of the two side walls and the like are often faced, and particularly, the problems are more prominent after the implementation of a stricter ultra-clean emission standard. The method is mainly used for accurately measuring the secondary air volume of each combustor, but is limited by the structural characteristics of the cyclone combustors, and the measurement of the secondary air volume of the combustors is difficult to realize, so that the conventional cyclone combustors of the domestic opposed firing boilers are basically not provided with online air volume measuring devices. Debugging personnel often can only be forced to adjust corresponding combustor inside and outside overgrate air baffle through afterbody flue cross-section flue gas composition distribution, and this mode has great error. For operators, due to the lack of an online air volume measuring device, accurate adjustment of air volume is not always possible.

The existing online air quantity measuring device of the cyclone burner mainly comprises an arc flute pipe and a multipoint type backrest pipe. Because the secondary air contains certain impurities such as dust, the air measuring device is very easy to block in the using process, great influence is caused to air quantity measurement, the accuracy of air quantity measurement is seriously influenced, and the problem that the uniform combustion of a boiler cannot be realized due to the fact that the secondary air quantity of a combustor cannot be accurately measured still cannot be solved.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to provide an air quantity measuring device for a cyclone burner, which is used for accurately measuring the air quantity of the cyclone burner.

In order to achieve the purpose, the invention adopts the technical scheme that:

an air volume measuring device for a cyclone burner comprises a first ring body, a second ring body and a pressure measuring component, wherein holes are formed in the first ring body and/or the second ring body, the pressure measuring component is used for measuring the pressure of air in the holes, an inner convex part protruding out of the first ring body is formed on the inner circumferential surface of the first ring body, and/or an outer convex part protruding out of the second ring body is formed on the outer circumferential surface of the second ring body,

when the air duct is in use, the first ring body is sleeved on the outer side of the second ring body, an air duct is formed between the inner circumferential surface of the first ring body and the outer circumferential surface of the second ring body, the air duct comprises a first section and a second section, the first section of the air duct is a straight section, the caliber of the second section of the air duct is changed from large to small and then large due to the inner convex part of the first ring body and/or the outer convex part of the second ring body, and the holes comprise first holes formed in the first ring body and/or the second ring body of the first section of the air duct and second holes formed in the first ring body and/or the second ring body of the second section of the air duct.

Preferably, the first ring body and the second ring body are both provided with the holes, and in a use state, the holes in the first ring body are distributed on the upper half circumferential surface of the first ring body, and the holes in the second ring body are distributed on the lower half circumferential surface of the second ring body.

Further preferably, the first ring body and the second ring body are provided with the first hole and the second hole.

More preferably, the first hole and the second hole are provided with a plurality of holes, and in a use state, included angles of two adjacent first holes on radial projection surfaces of the first ring body and the second ring body are equal; and included angles of the two adjacent second holes on the radial projection surfaces of the first ring body and the second ring body are equal.

Still further preferably, a set of a first hole and a second hole is formed in the first ring body, and the first hole and the second hole in the set are distributed along the axial direction of the first ring body; a group of first holes and second holes is formed in the second ring body, and the first holes and the second holes in the group are distributed along the axial direction of the second ring body.

Still further preferably, the device further comprises branch pipes and a header pipe, wherein the branch pipes are communicated with the holes, and the branch pipes communicated with the first holes are communicated with one header pipe; and the branch pipes communicated with the second holes are communicated with the other header pipe.

Still further preferably, the first hole and the second hole are both provided with a plurality of holes, the first ring body and the second ring body are respectively provided with a plurality of circular tubes around the axis thereof, the plurality of first holes of the first ring body, the plurality of second holes of the first ring body, the plurality of first holes of the second ring body and the plurality of second holes of the second ring body are respectively communicated with one circular tube, the plurality of branch tubes are provided, and one circular tube is communicated with one branch tube.

Still further preferably, the branch pipe portions are located inside the first ring body and the second ring body.

Preferably, in a use state, the first ring body and the second ring body are coaxially arranged; the first ring body and the second ring body are both circular rings.

Preferably, the second hole is formed in the first ring body and/or the second ring body at the position where the aperture of the second section of the air duct is the smallest.

Preferably, the shape of the inner convex part of the first ring body is the same as that of the outer convex part of the second ring body.

Further preferably, in a use state, the minimum aperture of the second section of the air duct is 1/3 of the aperture of the first section of the air duct, and the aperture of the second hole is 1/3 of the aperture of the first section of the air duct.

More preferably, the inner convex part and the outer convex part each include a first surface, a second surface and a third surface which are connected in sequence, the first surface of the inner convex part is connected with the inner surface of the first section of the first ring body, the first surface of the inner convex part is an inclined surface, the second surface of the inner convex part is parallel to the axis of the first ring body, and the third surface of the inner convex part is an inclined surface; the first surface of the outer convex part is connected with the outer surface of the first section of the second ring body, the first surface of the outer convex part is an inclined surface, the second surface of the outer convex part is parallel to the axis of the second ring body, and the third surface of the outer convex part is an inclined surface.

Still further preferably, the included angle between the first surface of the inner convex part and the second surface thereof is 20-22 degrees, and the included angle between the third surface of the inner convex part and the second surface thereof is 7-15 degrees; the included angle between the first surface of the outer convex part and the second surface of the outer convex part is 20-22 degrees, and the included angle between the third surface of the outer convex part and the second surface of the outer convex part is 7-15 degrees.

The invention aims to provide a cyclone burner for realizing uniform combustion.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a cyclone burner, includes the overgrate air-supply line, still includes the amount of wind measuring device who is used for cyclone burner, the overgrate air-supply line is the annular tube and establish including overgrate air inner tube, cover the overgrate air outer tube outside the overgrate air inner tube, connect on the lateral surface of overgrate air inner tube the second ring body, connect on the medial surface of overgrate air outer tube first ring body.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the shape of the invention is matched with the secondary air inlet pipe of the cyclone burner, thus being convenient for installation of the device, and meanwhile, the invention has lower manufacturing and maintenance cost and is convenient for large-scale implementation; the structure with the Venturi tube can accurately measure the secondary air quantity of the cyclone burner, and solves the problem that the secondary air quantity of the cyclone burner has no effective air quantity measuring device; the defects that the existing air quantity measuring device is blocked and cannot accurately measure for a long time are overcome, the long-term reliable, stable and accurate measurement of the secondary air quantity of the cyclone burner is realized, and a solid foundation can be laid for the uniform combustion of the opposed firing boiler.

Drawings

FIG. 1 is a schematic structural diagram of a wind measuring device according to the present embodiment;

FIG. 2 is a schematic structural view of the wind measuring device of the present embodiment installed in the secondary air intake duct;

FIG. 3 is an axial cross-sectional view of the air flow measuring device of this embodiment as it is disposed within the overfire air inlet duct.

In the above drawings: 11. a first ring body; 12. a second ring body; 21. an inner convex portion; 22. an outer convex portion; 23. a first side; 22. a second face; 25. a third surface; 26. an air duct; 3. a first hole; 4. a second hole; 5. a branch pipe; 6. a ring pipe; 7. a secondary air inner pipe; 8. and (4) a secondary air outer pipe.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 3, an air volume measuring device for a cyclone burner includes a first ring body 11, a second ring body 12 and a pressure measuring unit, wherein holes are respectively formed on the first ring body 11 and the second ring body 12, and the pressure measuring unit is used for measuring the pressure of air in the holes.

The first ring body 11 and the second ring body 12 are circular rings and have the same length, an inner convex portion 21 protruding from the surface of the first ring body 11 is formed on the inner circumferential surface of the first ring body 11, an outer convex portion 22 protruding from the surface of the second ring body 12 is formed on the outer circumferential surface of the second ring body 12, and the inner convex portion 21 of the first ring body 11 and the outer convex portion 22 of the second ring body 12 have the same shape. In this embodiment, the first ring body 11 and the second ring body 12 are made of heat-resistant alloy steel ZG₃₀Cr₂₀Ni₁₄Has strong high temperature resistance and wear resistance, and greatly prolongs the service life. When the ring is in use, the first ring body 11 and the second ring body 12 are coaxially arranged, and an air duct 26 is formed between the inner circumferential surface of the first ring body 11 and the outer circumferential surface of the second ring body 12. The air duct 26 comprises a first section and a second section, the first section of the air duct 26 is a straight line section, the second section of the air duct 26 is formed between the inner convex part 21 of the first ring body 11 and the outer convex part 22 of the second ring body 12, and the inner convex part 21 and the outer convex part 22 are symmetrically arranged, so that the caliber of the second section of the air duct 26 changes from large to small and then large, air flows to the second section of the air duct 26 from the first section in a use state, and the air quantity can be measured as a structure of a venturi tube in the embodiment.

The inner convex part 21 of the first ring body 11 and the outer convex part 22 of the second ring body 12 both comprise a first surface 23, a second surface 24 and a third surface 25 which are connected in sequence, the first surface 23 of the inner convex part 21 is connected with the inner surface of the first section of the first ring body 11, the first surface 23 of the inner convex part 21 is an inclined surface, the second surface 24 of the inner convex part 21 is parallel to the axis of the first ring body 11, and the third surface 25 of the inner convex part 21 is an inclined surface; the first surface 23 of the male protrusion 22 is connected to the first section of the outer surface of the second ring 12, the first surface 23 of the male protrusion 22 is a slope, the second surface 24 of the male protrusion 22 is parallel to the axis of the second ring 12, and the third surface 25 of the male protrusion 22 is a slope. In the use state, the wind flows through the first surface 23, the second surface 24 and the third surface 25 in sequence, and along the wind flow direction, the diameter of the first section of the wind channel 26 is L, and the cross-sectional area is S₁(ii) a The first surfaces 23 of the inner and outer protrusions 21, 22 are gradually increasedA converging section that tapers to form a second section of the air chute 26; the second surfaces 24 of the inner convex part 21 and the outer convex part 22 are parallel to each other to form a straight throat pipe section of the second section of the air duct 26, the straight throat pipe section of the second section of the air duct 26 is the narrowest part of the air duct 26, the length and the diameter of the straight throat pipe section are both 1/3L, and the sectional area is S₂(ii) a The third surfaces 25 of the inner convex portion 21 and the outer convex portion 22 are gradually separated to form a diffuser section of the second section of the air duct 26. The included angle between the first surface 23 of the inner convex part 21 and the second surface 24 thereof, the included angle between the first surface 23 of the outer convex part 22 and the second surface 24 thereof are the same, and the angle range is between 20 degrees and 22 degrees, the included angle between the second surface 24 of the inner convex part 21 and the third surface 25 thereof, and the included angle between the second surface 24 of the outer convex part 22 and the third surface 25 thereof are the same, and the angle range is between 7 degrees and 15 degrees. The specific size of the device can be flexibly adjusted according to the actual installation environment.

The hole is including offering the first hole 3 on the first ring body 11, the second ring body 12 that are located the first section in wind channel 26, offering the second hole 4 on the first ring body 11, the second ring body 12 that are located the second section in wind channel 26, offering a plurality of first holes 3, a plurality of second holes 4 on the first ring body 11, offering a plurality of first holes 3, a plurality of second holes 4 on the second ring body 12. The first hole 3 is located at the first section of the air duct 26, the second hole 4 is located at the straight throat pipe section of the second section of the air duct 26, and the diameter of the second hole 4 is equal to the length of the straight throat pipe section where the second hole is located, which is also 1/3L. A first hole 3 and a second hole 4 on the first ring body 11 form a group, and the first hole 3 and the second hole 4 in the group are distributed along the axial direction of the first ring body 11; the first hole 3 and the second hole 4 on the second ring body 12 form a group, and the first hole 3 and the second hole 4 in the group are distributed along the axial direction of the second ring body 12. The positive pressure when the wind flows through the device is measured to the first hole 3, the negative pressure when the wind flows through the device is measured to the second hole 4, so the air duct 26 of the device can form a venturi structure, the structure has small pressure loss, good dust prevention effect, no strict requirement on a straight pipe section, high and more accurate dynamic pressure amplification factor, and can realize uniform and stable measurement of multiple sections by utilizing the venturi structure.

The first hole 3 and the second hole 4 on the first ring body and the first hole 3 and the second hole 4 on the second ring body are positioned on two opposite semi-rings. When the secondary air measuring device is in a use state, the first ring body 11 and the second ring body 12 are arranged horizontally in the axial direction, the first holes 3 and the second holes 4 in the first ring body 11 are distributed on the inner peripheral surface of the upper half ring, the holes in the second ring body 12 are distributed on the outer peripheral surface of the lower half ring, and the holes are arranged upwards, so that the aims of effectively preventing dust and blocking are further fulfilled, and the secondary air measuring device for the cyclone burner is used for measuring reliably, stably and accurately for a long time. In a use state, included angles of two adjacent first holes 3 on radial projection surfaces of the first ring body 11 and the second ring body 12 are equal, namely, the included angles are distributed on a flow direction cross section of wind in an equal distribution mode, and included angles of two adjacent second holes 4 on radial projection surfaces of the first ring body 11 and the second ring body 12 are equal, namely, the included angles are distributed on the flow direction cross section of the wind in an equal distribution mode. In the present embodiment, six first holes 3 are provided, wherein the first ring body 11 and the second ring body 12 are provided in three, and six second holes 4 are provided, wherein the first ring body 11 and the second ring body 12 are provided in three.

The device also comprises a plurality of branch pipes 5, a plurality of ring pipes 6 and two main pipes. The ring pipe 6 is seted up at first ring body 11, in the second ring body 12 and around first ring body 11 axis respectively, the setting of second ring body 12 axis, a plurality of first holes 3 of first ring body 11 all communicate with a ring pipe 6, a plurality of second holes 4 of first ring body 11 all communicate with a ring pipe 6, a plurality of first holes 3 of second ring body 12 all communicate with a ring pipe 6, a plurality of second holes 4 of second ring body 12 all communicate with a ring pipe 6, be provided with four ring pipes 6 promptly. The branch pipe 5 is partially positioned in the first ring body 11 and the second ring body 12, the material is stainless steel, the branch pipe 5 is directly led out along the axial direction, and when the burner is in a use state, the space in the burner body is not occupied, the mounting is convenient, and the large-scale setting of the device is convenient. A branch pipe 5 is communicated with one ring pipe 6, namely four branch pipes 5 are arranged, the branch pipes 5 extend out of the first ring body 11 and the second ring body 12 and are communicated with a main pipe, the branch pipes 5 communicated with the first holes 3 are communicated with one main pipe, and the branch pipes 5 communicated with the second holes 4 are communicated with the other main pipe. The pressure measuring device is connected with the two main pipes, and the pressure measuring device can adopt a differential pressure transmitter, a miniature press machine or a U-shaped pressure gauge. The pressure measuring device can measure the pressure P of the header pipe communicated with the first hole 3₁Pressure P of the header pipe communicating with the second port 4₂。

As shown in fig. 2 and 3, a cyclone burner comprises a secondary air inlet pipe, wherein the secondary air inlet pipe is an annular pipe and comprises a secondary air inner pipe 7 and a secondary air outer pipe 8 sleeved outside the secondary air inner pipe 7, the cyclone burner further comprises the air volume measuring device for the cyclone burner, the air volume measuring device is manufactured according to the size of the annular secondary air inlet pipe of the cyclone burner, and is placed into the annular secondary air inlet pipe of the cyclone burner and fixed with the secondary air inlet pipe of the cyclone burner through welding. The outer peripheral surface of the first ring body 11 is connected with the inner side surface of the secondary air outer pipe 8, the inner peripheral surface of the second ring body 12 is connected with the outer side surface of the secondary air inner pipe 7, and the branch pipe 5 extends outwards from the air inlet side.

The working principle of the present embodiment is specifically described as follows:

the air quantity measuring device is horizontally arranged in the secondary air inlet pipe to measure the sectional area S of the first section of the air duct 26₁The sectional area of the straight pipe section at the throat part of the second section is S₂And the pressure P of the manifold communicating with the first port 3₁Pressure P of the header pipe communicating with the second port 4₂Obtaining the pressure difference (P) of the air flow in the device₁-P₂) Then, the flow velocity of the secondary air in the annular secondary air inlet pipe of the cyclone burner can be obtained through Bernoulli's theorem, and further the flow can be calculated.

According to Bernoulli's equation, formula (one):；

where P is the pressure at a point in the secondary air, v is the flow velocity at the point in the secondary air, ρ is the fluid density, g is the acceleration of gravity, h is the height at the point in the secondary air, and C is a constant.

For the annular Venturi air volume measuring device, because the axis is horizontally arranged in use, the height of the straight line segment of the throat part of the first section is the same as that of the straight line segment of the throat part of the second section, and therefore, the Bernoulli equation of the formula (I) is transformed into:

formula (II):；

in the formula, v₁The velocity of the secondary air flowing through the first hole 3, v₂Is the flow velocity of the secondary air flowing through the second holes 4.

And because the volume of the secondary air flowing through is the same in the same time, the formula (III) can be obtained:。

therefore, according to the equations (two) and (three), the flow rate of the secondary air in the first section (i.e., the inlet end) of the air duct 26 is:

formula (IV):。

then the mass flow Q of the secondary air inlet pipe of the cyclone burner can be calculated by the formula (V),

formula (V):。

the problem that the secondary air quantity of the cyclone burner has no effective air quantity measuring device for a long time is solved, the defects that the conventional device is blocked and cannot be used for measuring accurately for a long time are overcome, the secondary air quantity of the cyclone burner is measured reliably, stably and accurately for a long time, and meanwhile, the secondary air quantity measuring device lays a solid foundation for uniform combustion of an opposed firing boiler.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.