CN203703960U - Air-cooling pulverized coal low-nitrogen combustor - Google Patents
Air-cooling pulverized coal low-nitrogen combustor Download PDFInfo
- Publication number
- CN203703960U CN203703960U CN201420041593.1U CN201420041593U CN203703960U CN 203703960 U CN203703960 U CN 203703960U CN 201420041593 U CN201420041593 U CN 201420041593U CN 203703960 U CN203703960 U CN 203703960U
- Authority
- CN
- China
- Prior art keywords
- air
- tube body
- pipe
- cylindrical shell
- precombustion chamber
- 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.)
- Expired - Lifetime
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 17
- 239000003245 coal Substances 0.000 title abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 title abstract description 4
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- 239000002817 coal dust Substances 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000001788 irregular Effects 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 2
- 210000001015 abdomen Anatomy 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 6
- 206010021143 Hypoxia Diseases 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 206010002660 Anoxia Diseases 0.000 description 2
- 241000976983 Anoxia Species 0.000 description 2
- 230000007953 anoxia Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000002631 hypothermal effect Effects 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model relates to an air-cooling pulverized coal low-nitrogen combustor which is suitable for a small and medium industrial pulverized coal boiler. The combustor comprises a tube body, an ignition bin, a pre-combustion chamber, a primary air pulverized coal pipe, a backflow cap, a secondary air pipe and a tertiary mixed air pipe. One end of the tube body is sealed, and the other end of the tube body is open. The ignition bin is located on the outer side of the tube body, the pre-combustion chamber is arranged in the tube body, the primary air pulverized power pipe penetrates through the center of the ignition bin and the center of the tube body and enters the pre-combustion chamber, and the backflow cap is arranged at the outlet end of the primary air pulverized coal pipe. The secondary air pipe is arranged at the bottom of the tube body, and the tertiary mixed air pipe is arranged at the top of the tube body. The section of the pre-combustion chamber is fusiform, small in opening and large in belly, and an annular gap is reserved between the pre-combustion chamber and the tube body. An annular baffle is arranged in the radial direction in the annular gap close to the inlet end of the pre-combustion chamber and used for dividing the annular gap into an air box and an air-cooling clamping sleeve. A gap is reserved between the backflow cap and the outlet end of the primary air pulverized coal pipe. The secondary air pipe is communicated with the air box, and the tertiary mixed air pipe is communicated with the air-cooling clamping sleeve.
Description
Technical field
The utility model relates to a kind of burner, particularly about a kind of air-cooled coal dust low NO that is applicable to middle-size and small-size industrial coal powder boiler use.
Background technology
At present, national environmental protection department requires increasingly stringent to the pollutant emission of boiler, has increased the discharge index of NOx in " the boiler air pollution emission standard " revised edition that is about to announce, and requires the NOx emission limit of new construction of coal-fired boiler to be less than 300mg/m
3.Patent 200910087161.8 has been introduced the coal burner that a kind of applicable small and medium-sized industrial coal powder boilers is used.Through third party's actual measurement, the NOx concentration of emission of this burner is greater than 300mg/m
3.For meeting the up-to-date environmental requirement of country, need be optimized improvement to the structure of this burner, further reduce the discharge index of its NOx.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide the air-cooled coal dust low NO that a kind of applicable small and medium-sized industrial coal powder boilers is used, and this burner can be widely used in various small and medium-sized industrial coal powder boilers.
For achieving the above object, the utility model is by the following technical solutions: a kind of air-cooled coal dust low NO, it is characterized in that, this burner comprises: the uncovered cylindrical shell of the airtight other end in one end, one is positioned at the igniting storehouse in described cylindrical shell outside, one is arranged on the precombustion chamber in described cylindrical shell, one center of running through described igniting storehouse and cylindrical shell enters the primary air inlet of described precombustion chamber, one is arranged on the backflow cap of the end of the described primary air inlet port of export, one is arranged on the secondary air channel of described cylinder body bottom, an and mixing tertiary-air pipe that is arranged on described cylindrical shell top, wherein, the cross section of described precombustion chamber is the fusiformis that young tripe is large, and leaves annular gap between described precombustion chamber and cylindrical shell, in the close described annular gap of described precombustion chamber entrance point, a ring baffle is radially set, described annular gap is separated into two independently airtight chamber by described ring baffle, wherein form bellows near the chamber of described precombustion chamber entrance point, and another irregular chamber forms air cooling chuck, described backflow cap and the primary air inlet port of export leave gap, described secondary air channel is communicated with described bellows, described mixing tertiary-air pipe is communicated with described air cooling chuck.
Some swirl vanes are circumferentially set in described bellows, and the profile of described swirl vane is the irregular curved surface forming by mould punching.
One regulating handle with gear drive is set on the panel in described igniting storehouse, and described gear drive connects described swirl vane.
One igniter, a pulse valve, a flame detector and two are set on the panel in described igniting storehouse for observing the peephole of combustion position.
The utility model is owing to taking above technical scheme, it has the following advantages: 1, first the utility model reduces to below 80% of total combustion air volume by first and second air quantity that feeds precombustion chamber in use, fuel is first burnt under anoxia condition, in reducing atmosphere, reduce NOx production rate; Part hypothermia and hypoxia circulating flue gas is mixed to the air cooling chuck of sending into burner after flameholding with tertiary air as the cooling medium participation heat exchange of precombustion chamber simultaneously, then enter the burner hearth of boiler to provide completing combustion needed residue air quantity, finally under excess air coefficient is greater than 1 condition, complete low NOx combustion process.Whole PROCESS COUPLING Researched of Air Staging Combustion Burning Pulverized Coal and flue gas recirculating technique, brought into play the two synergy, effectively suppress the generation of NOx, relatively single low nitrogen technology, NOx reduction of discharging rate improves more than 30%.2, precombustion chamber of the present utility model has an air cooling chuck outward, utilizes tertiary air and circulating flue gas to mix air cooling to precombustion chamber, to substitute traditional water-cooling pattern, thereby burner structure is more simplified, and weight of equipment and cost are reduced.3, the utility model is owing to being provided with backflow cap at the end of the powder feeding pipe port of export, the coal dust that can make powder feeding pipe carry is dispersed in precombustion chamber after the reflection of backflow cap, coordinate the wind sent into of blast pipe, the oxygen can well aftercombustion needing, makes the burning of coal dust more abundant.4, the utility model is equipped with the swirl vane of particular curve profile in bellows, can make the wind that air blast is sent into produce very strong cyclonic action, burned flame is formed and revolve flame.Particularly swirl vane is connected with gear drive, can be good at controlling the inclination angle of swirl vane by rotation regulating handle, thereby better control the axial velocity and the tangential velocity that blast wind, and then can effectively elongate the burning length of flame, make burning more fully, more stable, form the combustion efficiency of similar oil-burning gas-fired boiler device.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is left view of the present utility model.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figure 1, air-cooled coal dust low NO of the present utility model comprises cylindrical shell 1, precombustion chamber 2, igniting storehouse 3, primary air inlet 4, secondary air channel 5 and mixes tertiary-air pipe 6.Wherein, cylindrical shell 1 one end is airtight, and the other end is uncovered, in use can arbitrarily angledly place.Precombustion chamber 2 is arranged in cylindrical shell 1, is the fusiformis that young tripe is large, and leaves annular gap between precombustion chamber 2 and cylindrical shell 1.In the close annular gap of cylindrical shell 1 sealed end, be radially provided with a ring baffle 7, annular gap is separated into two independently chambers by this ring baffle 7, the chamber that is wherein positioned at cylindrical shell 1 sealed end one side forms bellows 8, and the chamber that is positioned at cylindrical shell 1 opening end one side forms air cooling chuck 9.Igniting storehouse 3 is fastenedly connected the outside at bellows 8 by flange.
The center that the port of export 4-1 of primary air inlet 4 runs through igniting storehouse 3 and bellows 8 enters precombustion chamber 2, its entrance point 4-2 is arranged on outside igniting storehouse 3 and connects charging gear (not shown), port of export 4-1 extends to the bottom of precombustion chamber 2, and being provided with a backflow cap 10 at the end of port of export 4-1, backflow cap 10 retains specific gap with port of export 4-1.Secondary air channel 5 is arranged on the bottom of bellows 8, and its one end is communicated with bellows 8, and the other end is communicated with air blast (not shown).Mix tertiary-air pipe 6 and be arranged on air cooling chuck 9 tops near bellows 8 one sides, its one end is communicated with air cooling chuck 9, and the other end connects air blast and smoke backflow pipe (not shown).
In a preferred embodiment, bellows 8 are interior is circumferentially provided with some swirl vanes 11, the profile of swirl vane 11 is the irregular curved surfaces that are stamped to form by particular manufacturing craft, and the quantity of its setting and eddy flow angle are are all researched and developed according to aerodynamic principle.Simultaneously, on the panel 18 in igniting storehouse 3, be provided with a regulating handle 12(with gear drive as shown in Figure 2), and swirl vane 11 is connected with the gear drive on regulating handle 12, therefore can regulate by regulating handle 12 the eddy flow angle of swirl vane 11, thereby effectively control length and the intensity of revolving flame, make burning more fully, evenly.
In a preferred embodiment, as shown in Figure 2, on the panel 18 in igniting storehouse 3, be provided with a camera 13, upper and lower two peepholes 14, an igniter 15, a pulse valve 16 and a flame detector 17.Camera 13 is for the interior combustion position of remote observation precombustion chamber 2, peephole 14 is for the interior combustion position of field observation precombustion chamber 2, igniter 15 is for pulverized coal ignition, pulse valve 16 sprays into the compressed air of precombustion chamber 2 inside and removes dust stratification for controlling, flame detector 17 is at boiler start/ stop and in service, the flame combustion situation of monitoring in precombustion chamber 2, by signal feedback to the control system of burner to make next step operational order.
The air-cooled coal dust low NO that the utility model provides, can use in accordance with the following steps:
1) cylindrical shell of air-cooled coal dust low NO 1 opening end is docked with the burner hearth of boiler;
2) after boiler water, wind system start, opening point firearm 15, lights liquefied gas or fuel oil;
3) open charging gear and carry out coal dust supply, wind and coal dust are imported to 4, wind of primary air inlet and coal dust, and through backflow cap, 10 reflections enter precombustion chamber 2, and liquefied gas or fuel oil that coal dust has been burnt are lighted;
4) open the air blast being communicated with secondary air channel 5 Secondary Air is imported to bellows 8, Secondary Air enters precombustion chamber 2 after swirl vane 11, and first and second air quantity that makes to enter precombustion chamber 2 50%-80% that is total combustion air volume, coal dust is first burnt under anoxia condition, to reduce NOx generating rate in reducing atmosphere;
5) open the air blast being communicated with mixing tertiary-air pipe 6 simultaneously tertiary air is imported to the first participation of the cooling medium as precombustion chamber 2 of air cooling chuck 9 heat exchange, then accelerate ejection from cylindrical shell 1 opening end, the flue gas producing with precombustion chamber 2 burnings mixes in the burner hearth of boiler, to provide completing combustion needed residue air quantity, finally under being greater than 1 condition, excess air coefficient completes whole combustion processes;
6) after flameholding, extract the boiler tail flue gas of 5%-40% from flue between boiler tail and air-introduced machine, utilize backflow blower fan to be imported and mix the smoke backflow pipe that is communicated with of tertiary-air pipe 6, entering air cooling chuck 9 through mixing tertiary-air pipe 6 after boiler tail flue gas is mixed with tertiary air to participate in heat exchange and burning.
In addition, in process of coal combustion, can change the parameters such as powder-feeding amount, the air output of air blast and the eddy flow angle of swirl vane 11 of flue gas recycling rate, feeding device, thereby change NOx concentration of emission, flame combustion position, combustion intensity and swirl strength etc. in precombustion chamber 2, make coal dust in precombustion chamber 2, be able to environmental protection and reasonably organize burning, reach the object of the steady combustion of low nitrogen.
The utility model only describes with above-described embodiment; structure, setting position and the connection thereof of each parts all can change to some extent; on the basis of technical solutions of the utility model; all improvement of indivedual parts being carried out according to the utility model principle and equivalents, all should not get rid of outside protection domain of the present utility model.
Claims (4)
1. an air-cooled coal dust low NO, is characterized in that, this burner comprises:
The uncovered cylindrical shell of the one airtight other end in one end,
One is positioned at the igniting storehouse in described cylindrical shell outside,
One is arranged on the precombustion chamber in described cylindrical shell,
One center of running through described igniting storehouse and cylindrical shell enters the primary air inlet of described precombustion chamber,
One is arranged on the backflow cap of the end of the described primary air inlet port of export,
One is arranged on the secondary air channel of described cylinder body bottom, and
One is arranged on the mixing tertiary-air pipe at described cylindrical shell top;
Wherein, the cross section of described precombustion chamber is the fusiformis that young tripe is large, and leaves annular gap between described precombustion chamber and cylindrical shell; In the close described annular gap of described precombustion chamber entrance point, a ring baffle is radially set, described annular gap is separated into two independently airtight chamber by described ring baffle, wherein form bellows near the chamber of described precombustion chamber entrance point, and another irregular chamber forms air cooling chuck; Described backflow cap and the primary air inlet port of export leave gap; Described secondary air channel is communicated with described bellows; Described mixing tertiary-air pipe is communicated with described air cooling chuck.
2. the air-cooled coal dust low NO of one as claimed in claim 1, is characterized in that, some swirl vanes are circumferentially set in described bellows, and the profile of described swirl vane is the irregular curved surface forming by mould punching.
3. the air-cooled coal dust low NO of one as claimed in claim 2, is characterized in that, a regulating handle with gear drive is set on the panel in described igniting storehouse, and described gear drive connects described swirl vane.
4. the air-cooled coal dust low NO of one as described in claim 1 or 2 or 3, is characterized in that, an igniter, a pulse valve, a flame detector and two is set on the panel in described igniting storehouse for observing the peephole of combustion position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420041593.1U CN203703960U (en) | 2014-01-22 | 2014-01-22 | Air-cooling pulverized coal low-nitrogen combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420041593.1U CN203703960U (en) | 2014-01-22 | 2014-01-22 | Air-cooling pulverized coal low-nitrogen combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203703960U true CN203703960U (en) | 2014-07-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420041593.1U Expired - Lifetime CN203703960U (en) | 2014-01-22 | 2014-01-22 | Air-cooling pulverized coal low-nitrogen combustor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203703960U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791494A (en) * | 2014-01-22 | 2014-05-14 | 煤炭科学研究总院 | Air-cooled pulverized coal low-nitrogen combustor and application method thereof |
-
2014
- 2014-01-22 CN CN201420041593.1U patent/CN203703960U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791494A (en) * | 2014-01-22 | 2014-05-14 | 煤炭科学研究总院 | Air-cooled pulverized coal low-nitrogen combustor and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA COAL RESEARCH INSTITUTE CO., LTD. Free format text: FORMER OWNER: COAL GENERAL ACADEMY Effective date: 20140624 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140624 Address after: 100013 Chaoyang District, Hepingli Youth Ditch Road, No. 5, No. Patentee after: CCTEG CHINA COAL Research Institute Address before: 100013 Chaoyang District, Hepingli Youth Ditch Road, No. 5, No. Patentee before: CHINA COAL Research Institute |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170120 Address after: Beijing Caiyu Economic Development Zone 102606 Beijing city Daxing District Long Yu Caiyu Town Street No. 5 Patentee after: CHINA COAL RESEARCH INSTITUTE (CCRI) ENERGY SAVING TECHNOLOGY CO.,LTD. Address before: 100013 Chaoyang District, Hepingli Youth Ditch Road, No. 5, No. Patentee before: CCTEG CHINA COAL Research Institute |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 102606 No.5, Yulong Street, Caiyu Economic Development Zone, Caiyu Town, Daxing District, Beijing Patentee after: Beijing Tiandi Sunac Technology Co.,Ltd. Address before: 102606 No.5, Yulong Street, Caiyu Economic Development Zone, Caiyu Town, Daxing District, Beijing Patentee before: CHINA COAL RESEARCH INSTITUTE (CCRI) ENERGY SAVING TECHNOLOGY CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |
|
| CX01 | Expiry of patent term |