CN110566948A - A burner for boiler transformation - Google Patents
A burner for boiler transformation Download PDFInfo
- Publication number
- CN110566948A CN110566948A CN201910983872.7A CN201910983872A CN110566948A CN 110566948 A CN110566948 A CN 110566948A CN 201910983872 A CN201910983872 A CN 201910983872A CN 110566948 A CN110566948 A CN 110566948A
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- CN
- China
- Prior art keywords
- gas
- boiler
- tube body
- kidney
- burner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000009466 transformation Effects 0.000 title claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000009420 retrofitting Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 210000003734 kidney Anatomy 0.000 claims 2
- 239000007789 gas Substances 0.000 abstract description 68
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 62
- 238000002485 combustion reaction Methods 0.000 abstract description 29
- 239000002737 fuel gas Substances 0.000 abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 15
- 239000003546 flue gas Substances 0.000 description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 239000000446 fuel Substances 0.000 description 5
- 238000002407 reforming Methods 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a combustion tube for boiler transformation, which comprises a tube body, wherein one end of the tube body is provided with an air inlet, the other end of the tube body is sealed, and the side wall of the tube body is provided with a plurality of air outlet holes with the width of 0.5-2 mm, so that fuel gas enters the tube body from the air inlet and flows out from the air outlet holes. When in use, the gas burner can be used for replacing devices such as a gas burner of the existing boiler, and the gas enters the tube body provided by the invention through the gas inlet so that the tube body is filled with mixed gas of the gas and air, and then the mixed gas in the tube body can overflow from the gas outlet hole on the side wall of the tube body, and the gas can be combusted on the surface of the tube body and form a layer of flame by igniting the mixed gas overflowing from the gas outlet hole, and because the width of the gas outlet hole on the tube body is 0.5-2 mm, the gas overflowing from the gas outlet hole can be fully contacted with the air, so that the gas can be fully combusted, the discharge amount of nitrogen oxides can be greatly reduced, and the stable low nitrogen oxide discharge standard can be reached.
Description
Technical Field
The invention relates to the technical field of gas combustion, in particular to a combustion pipe for boiler transformation.
Background
Natural gas, marsh gas, liquefied petroleum gas are one of the main fuels used by industrial and commercial boilers and heat exchangers, the emission standard of the national pollutant to the gas boiler, especially the emission standard of nitrogen oxide therein, is more and more strict, wherein the emission of nitrogen oxide must be lower than 30mg/m3 in cities such as Beijing. The traditional combustion adopts a fuel spray pipe, a nozzle and the like as an output structure of fuel, and the traditional burner nozzle on the market can only reach the nitrogen oxide emission of 150mg/m 3.
Therefore, the traditional combustion nozzle needs to be improved, the currently applied low-nitrogen combustion scheme mainly uses a flue gas recycling and reforming technology, the emission standard of 30mg/m3 can be achieved under specific conditions through flue gas recycling and reforming, but the low-nitrogen oxide emission combustion realized through the flue gas recycling and reforming technology mainly has the following defects:
Firstly, because the smoke recovery pipeline is additionally arranged at the smoke outlet of the boiler and connected to the air inlet of the boiler to realize smoke recovery, the pipeline circulates high-temperature smoke outside the boiler, and certain danger is generated; the condition of casualties caused by the safety accidents of partially reforming the boiler by recycling the flue gas in China already occurs, and the technology is proved to be not completely mature.
Secondly, the scheme is sensitive to the size of a boiler hearth, and the combustion effect can be influenced when the hearth is too large or too small; a flue gas flow regulating device is required to be additionally arranged on the flue gas recovery pipe, and is generally an electronic ratio regulating butterfly valve, so that the difficulty of debugging is increased by adding one more regulating variable; the effect of reducing nitrogen oxide emission can be achieved through flue gas recovery proportion adjustment, but the air-fuel ratio of combustion is influenced to a certain extent by flue gas, the combustion is unstable due to too much flue gas, and the expected nitrogen oxide emission standard cannot be achieved due to too little flue gas.
Therefore, how to provide a combustion device that can ensure low nox emission and is also safe and simple is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a combustion tube for boiler improvement, which can ensure low nitrogen oxide emission and has the characteristics of simple structure, safety and reliability.
In order to achieve the above purpose, the invention provides the following technical scheme:
The utility model provides a burner tube for boiler transformation, is equipped with air inlet, the sealed body of the other end including one end, be equipped with the venthole that a plurality of width is 0.5 to 2 millimeters on the lateral wall of body to make the gas follow the air inlet gets into in the body and follow the venthole flows out.
Preferably, the air outlet is a long-strip waist-shaped hole.
Preferably, the length direction of the kidney-shaped hole is arranged along the length direction of the pipe body.
Preferably, the kidney-shaped holes are arranged in a layered and equidistant mode along the length direction of the pipe body.
Preferably, every layer the waist type hole is followed the circumference equidistance of body sets up, and adjacent two-layer the waist type hole is followed the circumference dislocation set of body.
Preferably, the distance between two adjacent layers of the kidney-shaped holes is 0.5 to 4 millimeters.
Preferably, the length of the waist-shaped hole is 5 to 10 mm, and the width of the waist-shaped hole is 0.7 mm.
Preferably, the air outlet is a circular hole.
Preferably, the body includes that the steel sheet coils the pipe that the welding formed and cover in the plectane of pipe one end, the plectane with steel sheet sealing connection.
Preferably, the thickness of the steel plate is 0.5 to 2 mm.
The invention provides a combustion tube for boiler transformation, which comprises a tube body, wherein one end of the tube body is provided with an air inlet, the other end of the tube body is sealed, and the side wall of the tube body is provided with a plurality of air outlet holes with the width of 0.5-2 mm, so that fuel gas enters the tube body from the air inlet and flows out from the air outlet holes.
When in use, the gas burner can be used for replacing devices such as a gas burner of the existing boiler, and the gas enters the tube body provided by the invention through the gas inlet so that the tube body is filled with mixed gas of gas and air, and further the mixed gas in the tube body can overflow from the gas outlet hole on the side wall of the tube body, the outside of the tube body is in a natural air environment, the gas can be combusted on the surface of the tube body and forms a layer of flame by igniting the gas overflowing from the gas outlet hole, because the width of the gas outlet hole on the tube body is 0.5-2 mm, and the width of the gas outlet hole is very small, the thickness of the gas overflowing from the gas outlet hole can be very thin, therefore, the gas overflowing from the gas outlet hole can be fully contacted with the air, the gas can be fully combusted, the discharge amount of nitrogen oxides can be greatly reduced, and the flame is limited outside the gas outlet hole when the gas overflowing from the gas outlet hole, compare in the integrated flame of traditional combustor (refer to domestic natural gas kitchen), do not have obvious outer flame inner flame's branch, flame temperature too high can be avoided in this kind of design, because flame temperature is too high to be the main reason that nitrogen oxide concentration improves, consequently, can guarantee the low nitrogen oxide of combustor and discharge to stable emission standard who reaches low nitrogen oxide.
Therefore, the combustion pipe for boiler improvement provided by the invention does not need to change the boiler structure, avoids potential risks brought by a high-temperature flue gas pipeline, is insensitive to the size of a boiler furnace, does not need additional flue gas proportion adjustment, and can reach a stable low nitrogen oxide emission standard only by replacing the combustion pipe for boiler improvement provided by the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of an embodiment of a burner tube for boiler retrofit provided by the present invention;
FIG. 2 is a partial schematic view of a side wall of a burner tube for boiler retrofitting provided by the present invention.
Wherein, the tube body is 1, the air outlet is 2, and the air inlet is 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The core of the invention is to provide a combustion tube for boiler improvement, which can ensure low nitrogen oxide emission and has the characteristics of simple structure, safety and reliability.
Referring to fig. 1 to 2, fig. 1 is a schematic view of an embodiment of a combustion tube for boiler modification according to the present invention; FIG. 2 is a partial schematic view of a side wall of a burner tube for boiler retrofitting provided by the present invention.
The invention provides a combustion tube for boiler transformation, which comprises a tube body 1, wherein one end of the tube body 1 is provided with an air inlet 3, the other end of the tube body is sealed, and the side wall of the tube body 1 is provided with a plurality of air outlet holes 2 with the width of 0.5-2 mm, so that premixed mixed gas enters the tube body 1 from the air inlet 3 and flows out from the air outlet holes 2.
Wherein, body 1 can be cylindrical tubular structure, certainly the cross-section of body 1 also can be oval or square, the one end of body 1 sets up air inlet 3, so that the gas gets into the inside of body 1 from air inlet 3, the other end of body 1 keeps sealed, and be provided with venthole 2 on the lateral wall of body 1, so that the inside gas of getting into body 1 flows from venthole 2 on the 1 lateral wall of body, because 2 width of venthole that set up on the 1 lateral wall of body are 0.5 to 2 millimeters, therefore, the thickness of the gas that flows out from venthole 2 is thinner, the area of contact of gas with the air has been increased, make the gas fully contact for the air, thereby make the gas fully burn.
it should be noted that, because the sizes of different boilers are different, the size of the pipe body 1, and the number and size of the air outlet holes 2 on the pipe body 1 can be flexibly set according to actual needs, but it should be ensured that the width of the air outlet holes 2 is narrow, so that the fuel gas overflowing from the air outlet holes 2 can be sufficiently contacted with air and sufficiently combusted.
To further improve the uniformity of combustion, it is preferable that the gas entering the tube body 1 from the gas inlet 3 is a pre-mixed air and natural gas mixture with a suitable national standard air excess coefficient. The flame is limited outside the air outlet when the mixed gas overflowed from the air outlet 2 is combusted, compared with the integrated flame of the traditional burner (referring to a household natural gas stove), the invention has no obvious flame difference inside the outer flame, the design can avoid the overhigh flame temperature, and the overhigh flame temperature is the main reason for improving the concentration of the nitrogen oxide, thereby ensuring the low emission of the nitrogen oxide of the burner.
Therefore, when the combustion pipe for reforming the boiler provided by the invention is used, the combustion pipe can be used for replacing a gas nozzle and other devices of the existing boiler, so that gas enters the pipe body 1 provided by the invention through the gas inlet 3 to enable the pipe body 1 to be filled with the gas, the gas in the pipe body 1 can overflow from the gas outlet hole 2 on the side wall of the pipe body 1, the outside of the pipe body 1 is a natural air environment, and the gas can be combusted on the surface of the pipe body and form a layer of flame by igniting the gas overflowing from the gas outlet hole 2.
Because the width of the air outlet 2 on the pipe body 1 is 0.5-2 mm, the width of the air outlet 2 is very small, therefore, the thickness of the fuel gas overflowing from the air outlet 2 can be very thin, therefore, the fuel gas overflowing from the air outlet 2 can be fully contacted with the air, the fuel gas can be fully combusted, the discharge amount of nitrogen oxides can be greatly reduced, the discharge standard of low nitrogen oxides can be stably reached, the structure of a boiler does not need to be changed, the potential risk brought by a high-temperature flue gas pipeline is avoided, the size of a boiler furnace is not sensitive, the proportion of additional flue gas does not need to be adjusted, and the stable discharge standard of low nitrogen oxides can be reached only by replacing the combustion pipe for boiler transformation provided by the invention.
The combustion tube for boiler improvement provided by the invention can enable the nitrogen oxide product to be lower than 18mg per cube and far lower than the strictest emission standard of countries such as Beijing and the like, namely 30mg per cube through the test of a pollutant tester, and even can meet the strictest 9ppm pollutant index of the United states California pollutant emission index all over the world.
On the basis of the above-described embodiment, in consideration of the specific structural arrangement of the air outlet holes 2, it is preferable that the air outlet holes 2 be elongated kidney-shaped holes. The strip-shaped kidney-shaped hole can enable the gas in the pipe body 1 to overflow in a large area, and meanwhile, the strip-shaped kidney-shaped hole is narrow in width, sufficient in gas combustion and large in combustion area. Considering the specific arrangement of the kidney-shaped holes, it is preferable that the length direction of the kidney-shaped holes be arranged along the length direction of the pipe body 1 for processing.
On the basis of the above embodiment, in order to ensure the uniformity of combustion of the fuel gas on the surface of the pipe body 1, preferably, the kidney-shaped holes are arranged in layers and at equal intervals along the length direction of the pipe body 1, and each layer of kidney-shaped holes are arranged at equal intervals along the circumferential direction of the pipe body 1, and preferably, the distance between each layer of kidney-shaped holes may be 6.5 mm. In addition, in order to guarantee the strength of the pipe body 1, the adjacent two layers of waist-shaped holes are arranged along the circumferential direction of the pipe body 1 in a staggered mode, specifically, the staggered distance of the adjacent two layers of waist-shaped holes is 3.25 millimeters, so that the adjacent two layers of waist-shaped holes are prevented from being arranged in parallel, and the overall strength of the pipe body 1 is improved.
On the basis of the above embodiment, considering the specific arrangement of the distance between the two adjacent layers of kidney-shaped holes, the distance between the two adjacent layers of kidney-shaped holes should not be too large to ensure that the combustion area of the fuel gas on the side wall of the pipe body 1 is sufficient, preferably, the distance between the two adjacent layers of kidney-shaped holes is 0.5 to 4 mm, and specifically, the distance between the two adjacent layers of kidney-shaped holes is 1 mm. In addition, considering the specific arrangement of the length of the kidney-shaped hole, the length of the kidney-shaped hole is not excessively long, which may cause the overall strength of the pipe body 1 to be reduced, and preferably, the length of the kidney-shaped hole may be 5 to 10 mm, and the specific length of the kidney-shaped hole is 6 mm.
Of course, the outlet 2 may have other shapes, for example, the outlet 2 may be a circular hole, a rectangular hole or other irregular shapes, but it should be noted that the width of the outlet 2 should be controlled to be 0.5 to 2 mm to ensure that the gas flowing out from the outlet 2 is thin, so that the gas overflowing from the outlet 2 just reaches the optimal combustion air-fuel ratio during combustion, thereby ensuring that the gas can be sufficiently combusted. If the gas outlet 2 is too wide, the gas passing rate is increased, the gas is incompletely combusted to generate harmful substances such as carbon monoxide, and if the gas outlet 2 is too small, the whole gas passing rate is reduced, and the conversion rate of heat energy is influenced
On the basis of any of the above embodiments, in consideration of the specific arrangement manner of the pipe body 1, preferably, the pipe body 1 includes a steel pipe formed by welding steel plates in a winding manner and a circular plate covering one end of the steel pipe, the circular plate is hermetically connected with the steel plate, wherein a long hole is formed in the side wall of the pipe body 1, and the air outlet 2 in the steel plate can be formed by laser cutting.
Considering the specific setting of the thickness of the steel plate, the excessive thickness of the steel plate can cause processing difficulty and material waste, and the excessive thickness of the steel plate can affect the overall structural strength and service life, preferably, the thickness of the steel plate is 0.5 to 2 mm, and specifically, the thickness of the steel plate is 1 mm.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The burner tube for boiler modification according to the present invention has been described in detail. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a burner for boiler transformation, its characterized in that is equipped with air inlet (3), other end sealed body (1) including one end, be equipped with a plurality of width on the lateral wall of body (1) and be venthole (2) of 0.5 to 2 millimeters to make the gas follow air inlet (3) get into in body (1) and follow venthole (2) flow.
2. The burner tube for boiler revamping according to claim 1, characterized in that said outlet holes (2) are elongated kidney-shaped holes.
3. The burner pipe for boiler revamping according to claim 2, characterized in that the lengthwise direction of said kidney-shaped holes is arranged along the lengthwise direction of said tubular body (1).
4. Burner tube for boiler revamping according to claim 3, characterized in that said kidney-shaped holes are arranged in layers and equidistant along the length of said tubular body (1).
5. The burner pipe for boiler revamping according to claim 4, characterized in that each layer of said kidney-shaped holes is arranged equidistantly along the circumference of said pipe body (1), and two adjacent layers of said kidney-shaped holes are arranged offset along the circumference of said pipe body (1).
6. The burner tube for boiler retrofitting according to claim 5, wherein a pitch of said kidney holes of two adjacent layers is 0.5 to 4 mm.
7. The burner tube for boiler retrofitting according to claim 6, characterized in that said kidney holes have a length of 5 to 10 mm and a width of 0.7 mm.
8. The burner tube for boiler revamping according to claim 1, characterized in that said outlet holes (2) are circular holes.
9. The burner pipe for boiler reformation according to any one of claims 1 to 8, characterized in that the pipe body (1) comprises a circular pipe formed by winding and welding a steel plate and a circular plate covering one end of the circular pipe, and the circular plate is connected with the steel plate in a sealing manner.
10. The burner tube for boiler retrofitting of claim 9, wherein said steel plate has a thickness of 0.5 to 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910983872.7A CN110566948A (en) | 2019-10-16 | 2019-10-16 | A burner for boiler transformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910983872.7A CN110566948A (en) | 2019-10-16 | 2019-10-16 | A burner for boiler transformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110566948A true CN110566948A (en) | 2019-12-13 |
Family
ID=68785180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910983872.7A Withdrawn CN110566948A (en) | 2019-10-16 | 2019-10-16 | A burner for boiler transformation |
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| CN206531061U (en) * | 2017-03-09 | 2017-09-29 | 岳阳远大热能设备有限公司 | A kind of special gas burner for multiple hearth furnace |
| CN206592232U (en) * | 2017-03-22 | 2017-10-27 | 西安东新石油设备厂有限公司 | A kind of fuel blending system and engine |
| CN108980826A (en) * | 2017-06-05 | 2018-12-11 | 芜湖美的厨卫电器制造有限公司 | Burner and gas heater with it |
| CN206817948U (en) * | 2017-06-19 | 2017-12-29 | 广州市威士环保科技有限公司 | A kind of hot blast mixing chamber |
| CN109307268A (en) * | 2017-07-29 | 2019-02-05 | 上海钜荷热力技术有限公司 | A kind of flue gas is interior to recycle all-premixing burner |
| CN207132339U (en) * | 2017-09-15 | 2018-03-23 | 宁波方太厨具有限公司 | Cooker burner |
| CN208137184U (en) * | 2018-04-25 | 2018-11-23 | 湖州汇能新材料科技有限公司 | T-type air-entrained concrete building block structure |
| CN209054554U (en) * | 2018-09-27 | 2019-07-02 | 黄婉平 | A kind of low nitrogen oxide burner |
| CN209261647U (en) * | 2018-12-28 | 2019-08-16 | 烟台沃德新能源科技有限公司 | A kind of device that crankcase waste gas collects machine oil in vitro and flows back |
| CN210601616U (en) * | 2019-10-16 | 2020-05-22 | 杭州富尔顿热能设备有限公司 | A burner for boiler transformation |
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Application publication date: 20191213 |