CN211502762U - Water-cooled gas ultra-low nitrogen combustion device - Google Patents
Water-cooled gas ultra-low nitrogen combustion device Download PDFInfo
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- CN211502762U CN211502762U CN201921506079.XU CN201921506079U CN211502762U CN 211502762 U CN211502762 U CN 211502762U CN 201921506079 U CN201921506079 U CN 201921506079U CN 211502762 U CN211502762 U CN 211502762U
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- gas
- water
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- pipe
- low nitrogen
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- 239000007789 gas Substances 0.000 title claims abstract description 78
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 33
- 238000002485 combustion reaction Methods 0.000 title claims description 36
- 239000000498 cooling water Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
- 238000009792 diffusion process Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 4
- 239000000523 sample Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003546 flue gas Substances 0.000 abstract description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 39
- 230000009467 reduction Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model provides a water-cooled gas ultra-low nitrogen burner, neither change the boiler furnace body, nor increase the consumption, can realize the ultra-low nitrogen emission of boiler flue gas, be equipped with the gas pipe in the combustor casing, constitute air passage between combustor casing and the gas pipe, the lower extreme that just is located air passage in the combustor casing is provided with the premix chamber, be provided with the air throttle plate on the upper portion of premix chamber, the last distribution of air throttle plate has the through-hole, the end of gas pipe passes the air throttle plate setting, be provided with annular cooling water pipe group in the lower part of premix chamber, be provided with the shrouding in the bottom of premix chamber and between the ring canal that is located annular cooling water pipe group, the shrouding nozzle has been seted up on the shrouding; an ignition port of the ignition rod extends downwards out of the sealing plate; the lower part of the air passage is provided with a secondary combustion-supporting air hole, a secondary combustion-supporting air passage is formed between the combustor shell and the premixing cavity, and a secondary combustion-supporting air outlet is reserved between the lowest end of the premixing cavity and the combustor shell.
Description
Technical Field
The utility model belongs to the technical field of the combustor, especially, relate to a water-cooled ultralow nitrogen burner of gas.
Background
The boiler is one of the main sources of nitrogen oxide emission, and in order to protect the environment, the nitrogen oxide emission of the boiler must be reduced. The emission reduction method of the boiler nitrogen oxides mainly comprises two main categories: a low nitrogen oxide combustion technology in the furnace and a flue gas denitration technology. The smoke denitration technology is large in initial investment, high in operating cost and large in occupied area, and is not suitable for scattered medium and small boilers. The combustion technology of low nitrogen oxide in the furnace is adopted.
The main ways for controlling the generation of nitrogen oxides in the furnace are as follows: the combustion temperature level is reduced, and a local high-temperature area is prevented from being generated; the oxygen concentration in the main combustion zone is reduced so that combustion is carried out at a deviation from the theoretical air amount. At present, the above approaches or techniques are mainly applied to the improvement of the burner structure.
Many of the gas burners in use belong to low-nitrogen burners, and although the gas burners meet the national nitrogen oxide emission standard, the gas burners cannot meet ultra-low nitrogen emission, and the gas burners seriously pollute the environment after long-term use. With the improvement of the atmospheric protection requirements of some places, particularly environmental protection departments in large and medium-sized cities, the common low-nitrogen burner can not meet the requirements, the ultra-low-nitrogen burner must be adopted, the nitrogen oxides of the ultra-low-nitrogen burners in the market are reduced by adopting a flue gas circulation mode, a large amount of flue gas at the tail part of a boiler is introduced to be mixed with air and then enter a hearth, the central temperature of flame is reduced, the content of the nitrogen oxides is reduced, but the pressure in the boiler is greatly increased, the pressure of air supplied by an air supply fan needs to be synchronously increased, the power consumption needs to be increased, meanwhile, the central temperature of the flame is reduced, the radiation heat exchange quantity is reduced, the convection heat exchange quantity is increased, the heat exchange quantity of the same boiler is reduced, the heat supply quantity reaches the original value, otherwise, the boiler must be redesigned, the convection heat exchange area is increased, the manufacturing cost of the boiler is increased, and a large amount of power loss, namely energy waste, is caused after long-term use.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model provides a water-cooled gas ultra-low nitrogen burner, its structure sets up rationally, neither changes the boiler furnace body, does not increase the consumption again, can realize that the ultralow nitrogen of boiler flue gas discharges, can be for enterprise reduction in production cost, also can satisfy national energy saving and emission reduction's requirement, can create huge social and economic benefits.
The technical scheme is as follows: the utility model provides a water-cooled ultralow nitrogen burner of gas, includes the combustor casing, be provided with the gas pipe in the combustor casing, the gas import is connected to the upper end of gas pipe in the combustor casing, and be located the outside of gas pipe is provided with air channel, the combustor casing with constitute air channel between the gas pipe, air inlet, its characterized in that are connected to air channel's upper end: a premixing cavity is arranged in the combustor shell and positioned at the lower end of the air channel, an air throttle plate is arranged at the upper part of the premixing cavity, through holes are distributed on the air throttle plate, the tail end of the gas pipe penetrates through the air throttle plate, and gas flowing out from the lower end of the gas pipe and air flowing out from the through holes penetrating through the air throttle plate are premixed at the lower part of the premixing cavity;
an annular cooling water pipe group is arranged at the lower part of the premixing cavity, cooling water flows in from a water inlet, flows through the annular cooling water pipe group and flows out from a water outlet, a sealing plate is arranged at the bottom of the premixing cavity and between the annular pipes of the annular cooling water pipe group, and a sealing plate nozzle is arranged on the sealing plate; the ignition rod is characterized by also comprising an ignition port, and the ignition port of the ignition rod extends downwards out of the sealing plate; and a secondary combustion-supporting air hole is formed in the lower part of the air passage, a secondary combustion-supporting air passage is formed between the combustor shell and the premixing cavity, and a secondary combustion-supporting air outlet is reserved between the lowest end of the premixing cavity and the combustor shell.
Furthermore, a fire observation hollow pipe is arranged in the fuel gas pipe, and a fire observation opening is formed in one end of the fire observation hollow pipe.
Further, the gas pipe detachably install in the combustor casing, the lower extreme of gas pipe is provided with a plurality of gas diffusion pipes, the end of gas diffusion pipe passes the air throttle plate setting.
Further, an ion probe is arranged at the ignition port of the ignition rod.
Furthermore, the lower part in the combustor shell is provided with a water inlet header and a water outlet header, the water inlet header is connected with the annular cooling water pipe set through a water inlet distribution connecting pipe, and the water outlet header is connected with the annular cooling water pipe set through a water outlet distribution connecting pipe.
Furthermore, the water inlet and the water outlet are respectively connected into the boiler water circulation system through a water inlet flange connecting pipe and a water outlet flange connecting pipe.
Further, a gas regulating valve is arranged at the gas inlet, and an air volume regulating valve is arranged at the air inlet.
Furthermore, a fixing flange is connected to the burner housing.
Further, an inspection door is arranged on the burner housing.
Further, the ignition rod is fixed on the ignition rod fixing tube seat.
Further, the premixing chamber is tapered.
Further, the burner housing includes a main housing and a flame tube that are detachably connected.
The utility model provides a water-cooled gas ultra-low nitrogen burner directly introduces the annular cooling water nest of tubes of combustor with boiler water, this annular cooling water nest of tubes is when reducing flame core temperature and reducing nitrogen oxide, water in the nest of tubes can directly bring absorptive heat into the boiler and carry out effectual utilization, neither changing the boiler furnace body, under the prerequisite that does not increase the consumption again, realize the ultralow nitrogen emission of boiler flue gas, not only can be for enterprise reduction in production cost, also can satisfy national energy saving and emission reduction's requirement, can create huge social and economic benefits.
Drawings
Fig. 1 is a schematic diagram of the water-cooled gas ultra-low nitrogen combustion device of the utility model.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "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 of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
See fig. 1, the utility model discloses a water-cooled gas ultra-low nitrogen combustion device, which comprises a burner housing, the burner housing comprises a main housing 1 and a flame tube 33 detachably connected, a gas tube 2 is arranged in the burner housing, the upper end of the gas tube 2 extends out of the main housing 1, the upper end of the gas tube 2 is connected with a gas inlet 3, an air passage 3 is formed between the main housing 1 and the gas tube 2, the upper end of the air passage 4 is connected with an air inlet 5, a premixing chamber 6 is arranged in the flame tube 33 and at the lower end of the air passage 4, in this embodiment, the premixing chamber is a cone gradually enlarged from top to bottom, an air throttle plate 7 is arranged at the upper part of the premixing chamber 6, through holes 8 are distributed on the air throttle plate 7, the gas tube 2 is detachably mounted in the main housing 1, the lower end of the gas tube 2 is provided with a plurality of gas diffusion tubes 9, the tail ends of the gas diffusion, the gas flowing out of the gas diffusion pipe 9 at the lower end of the gas pipe and the air flowing out of the through hole 8 of the air-permeating throttle plate are premixed at the lower part of the premixing cavity 6;
an annular cooling water pipe group 10 is arranged at the lower part of the premixing cavity 6, cooling water flows in from a water inlet 11, flows through the annular cooling water pipe group 10 and flows out from a water outlet 12, in the embodiment, a water inlet header 13 and a water outlet header 14 are arranged at the lower part in the flame tube 33, the water inlet header 13 is connected with the annular cooling water pipe group 10 through a water inlet distribution connecting pipe 15, the water outlet header 14 is connected with the annular cooling water pipe group 10 through a water outlet distribution connecting pipe 16, and the water inlet 11 and the water outlet 12 are respectively connected into a boiler water circulation system through a water inlet flange connecting pipe 17 and a water outlet flange connecting pipe 18;
a sealing plate 19 is arranged at the bottom of the premixing cavity 6 and between the ring pipes of the annular cooling water pipe group 10, and a sealing plate nozzle 20 is arranged on the sealing plate 19; the water-cooled gas ultra-low nitrogen combustion device in the embodiment further comprises an ignition rod 21, the ignition rod 21 is fixed on an ignition rod fixing tube seat 22, and an ignition port of the ignition rod 21 extends downwards out of the sealing plate; an ion probe 23 is arranged at the ignition port of the ignition rod, and the ion probe 23 can be used for detecting whether the ignition rod is ignited successfully;
the lower part of the air passage 4 is provided with a secondary combustion air hole 24, a secondary combustion air passage 25 is formed between the flame tube 33 and the premixing cavity 6, and a secondary combustion air outlet 31 is reserved between the lowest end of the premixing cavity 6 and the flame tube 33.
In the embodiment, a fire observation hollow pipe 26 is arranged in the fuel gas pipe, one end of the fire observation hollow pipe is provided with a fire observation port 27, and the fire observation port 27 can be used for observing the combustion condition in the premixing cavity 6 and checking whether the fire rod is successfully ignited or not;
in addition, in the present embodiment, a gas regulating valve 28 is provided at the gas inlet 3, and can be used for controlling the gas inflow; an air volume adjusting valve 29 is arranged at the air inlet 4 and can be used for controlling the air intake volume of air;
in addition, in this embodiment, a fixing flange 30 is connected to the burner housing for fixing and installing the burner, the flame tube can be detached from the front end of the fixing flange, and an inspection door 32 is provided on the burner housing for facilitating maintenance and inspection.
The water-cooled gas ultra-low nitrogen combustion device of the utility model can send the gas and the combustion air into the premixing cavity for diffusion and premixing, the air throttle plate can fully mix the gas with the air, and simultaneously, the flame can be prevented from fleeing into the air inlet after the stop, thereby avoiding danger and improving the safety factor;
after the ignition rod is ignited, premixed gas is sprayed out from a sealing plate nozzle between the annular cooling water pipe groups for combustion, the premixed air quantity is oxygen-deficient combustion, the speed of the mixed gas is controlled through an air quantity regulating valve and a fuel gas regulating valve, flame falls between the annular cooling water pipe groups, cooling water flows in the annular cooling water pipe groups, the flame is diffused, can absorb heat and is oxygen-deficient combustion, the temperature of the flame is lower than the temperature of nitrogen oxidation, and nitrogen oxide cannot be generated; for combustible gas which is not completely combusted, air in the air channel flows out through secondary combustion air holes arranged at the lower part of the air channel, passes through a secondary combustion air channel formed between the flame tube and the premixing cavity and is sprayed out from a secondary combustion air outlet, the secondary combustion air enables the combustible gas which is not completely combusted to be further combusted, the flame is diffused by the annular cooling water tube group, the secondary combustion air gradually permeates the combustible gas which is not completely combusted from the periphery to the center, the combustion process is prolonged, the combustion temperature of the secondary combustion is low and can not reach the temperature of nitrogen oxidation, no nitrogen oxide is generated, and the ultra-low nitrogen environment-friendly emission is realized;
through detection, the emission amount of nitrogen oxides is less than 50 mg/cubic meter and far lower than 200 mg/cubic meter required by national standard, and the emission meets the requirement of special emission limit value of atmospheric pollutants in boiler atmospheric pollutant emission standard GB 13271-2014;
meanwhile, heat absorbed by the annular cooling water pipe group enters the boiler water circulation through the water inlet and outlet distribution connecting pipe and the water inlet and outlet flange connecting pipe, no heat loss is caused, the operation cost of an enterprise can be reduced, the environment-friendly emission reaching the standard can be realized, the ultralow nitrogen environment-friendly emission can be realized, the national requirements on energy conservation and emission reduction can be met, and huge social benefits and economic benefits can be created.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention 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 (10)
1. The utility model provides a water-cooled ultralow nitrogen burner of gas, includes the combustor casing, be provided with the gas pipe in the combustor casing, the gas import is connected to the upper end of gas pipe, the combustor casing with constitute air duct between the gas pipe, air inlet, its characterized in that are connected to air duct's upper end: a premixing cavity is arranged in the combustor shell and positioned at the lower end of the air channel, an air throttle plate is arranged at the upper part of the premixing cavity, through holes are distributed on the air throttle plate, the tail end of the gas pipe penetrates through the air throttle plate, and gas flowing out from the lower end of the gas pipe and air flowing out from the through holes penetrating through the air throttle plate are premixed at the lower part of the premixing cavity;
an annular cooling water pipe group is arranged at the lower part of the premixing cavity, cooling water flows in from a water inlet, flows through the annular cooling water pipe group and flows out from a water outlet, a sealing plate is arranged at the bottom of the premixing cavity and between the annular pipes of the annular cooling water pipe group, and a sealing plate nozzle is arranged on the sealing plate; the ignition rod is characterized by also comprising an ignition port, and the ignition port of the ignition rod extends downwards out of the sealing plate; and a secondary combustion-supporting air hole is formed in the lower part of the air passage, a secondary combustion-supporting air passage is formed between the combustor shell and the premixing cavity, and a secondary combustion-supporting air outlet is reserved between the lowest end of the premixing cavity and the combustor shell.
2. The water-cooled gas ultra-low nitrogen combustion device according to claim 1, characterized in that: the gas pipe is internally provided with a fire observation hollow pipe, and one end of the fire observation hollow pipe is provided with a fire observation port.
3. The water-cooled gas ultra-low nitrogen combustion device according to claim 1, characterized in that: the gas pipe detachably install in the combustor casing, the lower extreme of gas pipe is provided with a plurality of gas diffusion pipes, the end of gas diffusion pipe passes the setting of air throttle plate.
4. The water-cooled gas ultra-low nitrogen combustion device according to claim 1, characterized in that: an ion probe is arranged at the ignition port of the ignition rod.
5. The water-cooled gas ultra-low nitrogen combustion device according to claim 1, characterized in that: the combustor is characterized in that a water inlet collecting tank and a water outlet collecting tank are arranged at the lower part in the combustor shell, the water inlet collecting tank is connected with the annular cooling water pipe set through a water inlet distribution connecting pipe, and the water outlet collecting tank is connected with the annular cooling water pipe set through a water outlet distribution connecting pipe.
6. The water-cooled gas ultra-low nitrogen combustion device according to claim 1, characterized in that: the water inlet and the water outlet are respectively connected into the boiler water circulation system through a water inlet flange connecting pipe and a water outlet flange connecting pipe.
7. The water-cooled gas ultra-low nitrogen combustion device according to claim 1, characterized in that: the gas inlet is provided with a gas regulating valve, and the air inlet is provided with an air volume regulating valve.
8. The water-cooled gas ultra-low nitrogen combustion device according to claim 1, characterized in that: the combustor is characterized in that a fixing flange is connected to the combustor shell, and an inspection door is arranged on the combustor shell.
9. The water-cooled gas ultra-low nitrogen combustion device according to claim 1, characterized in that: the premixing chamber is tapered.
10. The water-cooled gas ultra-low nitrogen combustion device according to claim 1, characterized in that: the burner housing includes a main housing and a flame tube that are removably connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921506079.XU CN211502762U (en) | 2019-09-11 | 2019-09-11 | Water-cooled gas ultra-low nitrogen combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921506079.XU CN211502762U (en) | 2019-09-11 | 2019-09-11 | Water-cooled gas ultra-low nitrogen combustion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211502762U true CN211502762U (en) | 2020-09-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921506079.XU Withdrawn - After Issue CN211502762U (en) | 2019-09-11 | 2019-09-11 | Water-cooled gas ultra-low nitrogen combustion device |
Country Status (1)
| Country | Link |
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| CN (1) | CN211502762U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682773A (en) * | 2021-01-30 | 2021-04-20 | 罗诺克兹（北京）能源设备技术有限公司 | Central backfire type low-nitrogen transformation scheme |
-
2019
- 2019-09-11 CN CN201921506079.XU patent/CN211502762U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682773A (en) * | 2021-01-30 | 2021-04-20 | 罗诺克兹（北京）能源设备技术有限公司 | Central backfire type low-nitrogen transformation scheme |
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| AV01 | Patent right actively abandoned |
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