CN106322366A - Oxynitride reduction method applied to fuel coal opposed firing boiler - Google Patents
Oxynitride reduction method applied to fuel coal opposed firing boiler Download PDFInfo
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- CN106322366A CN106322366A CN201510378006.7A CN201510378006A CN106322366A CN 106322366 A CN106322366 A CN 106322366A CN 201510378006 A CN201510378006 A CN 201510378006A CN 106322366 A CN106322366 A CN 106322366A
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- Prior art keywords
- coal
- fired
- face
- fired boiler
- nitrogen oxides
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- 238000010304 firing Methods 0.000 title claims abstract description 20
- 230000009467 reduction Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003245 coal Substances 0.000 title claims abstract description 12
- 239000000446 fuel Substances 0.000 title abstract description 7
- 238000002485 combustion reaction Methods 0.000 claims abstract description 20
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 69
- 239000002817 coal dust Substances 0.000 claims description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 18
- 229910052760 oxygen Inorganic materials 0.000 claims description 18
- 239000001301 oxygen Substances 0.000 claims description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 10
- 230000001629 suppression Effects 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 description 14
- 238000003916 acid precipitation Methods 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
Abstract
The invention discloses an oxynitride reduction method applied to a fuel coal opposed firing boiler. The oxynitride reduction method is characterized in that one or more layers of primary air pulverized coal combustion nozzles (2) are mounted on the lower portion of a fuel coal opposed firing boiler front wall (1); one or more layers of combustion ash air nozzles (3) are mounted on the upper portion of the fuel coal opposed firing boiler front wall (1); one or more layers of primary air pulverized coal combustion nozzles (2) are mounted on the lower portion of a fuel coal opposed firing boiler rear wall (4); and one or more layers of combustion ash air nozzles (3) are mounted on the upper portion of the fuel coal opposed firing boiler rear wall (4).
Description
Technical field
The present invention relates to a kind of method applying to coal-fired face-fired boiler reduction nitrogen oxides, refer in particular to the application during coal-fired face-fired boiler low nitrogen burning.
Background technology
The nitrogen oxides produced in coal-fired power plant of current China running is one of principal element of atmospheric pollution, coal-fired plant boiler discharges substantial amounts of nitrogen oxides and further exacerbates ecological deterioration, on the one hand nitrogen oxides can form photochemical fog under certain condition together with Hydrocarbon and destroy atmospheric environment, serious harm human health, deteriorates the environment that the mankind depend on for existence；On the other hand, sulfur and nitrogen oxides is again the principal element forming acid rain. at present, there is large stretch of acid rain area all over the world. and the development of China's acid rain is also abnormal rapid, and serious acid precipitation and fragile ecosystem make China's economy sustain losses severely.
Since the issuing and implementation of national standard " fossil-fuel power plant atmospheric pollutant emission standard ", the existing coal-fired face-fired boiler DS NOx Est concentration in many coal-burning power plants can not meet the limit value of new standard.In order to reach the requirement of thermal power plant's DS NOx Est standard, propose denitration renovation technique route for coal-burning power plant's opposed firing boiler oneself state and carrying out practically condition.Many power plant select to use:
1) denitrating flue gas (SCR) technology, is to spray in high-temperature flue gas denitrification apparatus with ammonia as denitrfying agent, NOx is decomposed into N2 and H2O, but this type of technical difficulty is big.
2) classification low-NO_x combustion technology, is to make the process of coal dust firing complete stage by stage by air classification or fuel staging, but this type of class skills classification degree of depth is inadequate, weak effect, operation to boiler requires complexity, affects boiler combustion efficiency, it is impossible to reach national existing discharge standard.
Therefore, exploitation combustion with reduced pollutants technology or device, the discharge capacity reducing nitrogen oxides is one of matter of utmost importance the most urgently to be resolved hurrily.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of method applying to coal-fired face-fired boiler reduction nitrogen oxides.
For reaching object above, the solution of the present invention is:
A kind of method applying to coal-fired face-fired boiler reduction nitrogen oxides, it is characterized in that, in the bottom of coal-fired face-fired boiler front wall (1), one or more layers First air coal dust firing spout (2) is installed, on the top of coal-fired face-fired boiler front wall (1), one or more layers burnt wind spout (3) is installed, after coal-fired face-fired boiler, one or more layers First air coal dust firing spout (2) is installed in the bottom of wall (4), and after coal-fired face-fired boiler, one or more layers burnt wind spout (3) is installed on the top of wall (4).
Further, coal dust is front through First air coal dust firing spout (2), in anaerobic environment, ignition has the most been shifted to an earlier date in pulverized coal channel, produce a large amount of carbon monoxide, carbon monoxide fully burns at coal-fired face-fired boiler burner hearth (1) upper area at the suppression of coal-fired face-fired boiler burner hearth (5) lower combustion region and nitrogen oxides reduction, carbon monoxide.
Further, the amount of oxygen of institute of face-fired boiler burner hearth (5) lower combustion district proportioning burns required amount of oxygen completely less than coal dust.
Further, the oxygen of face-fired boiler burner hearth (5) upper area institute proportioning is provided by burnt wind spout (3), and amount of oxygen burns required amount of oxygen completely more than or equal to coal dust.
Principle and the feature of the present invention are:
Coal dust is made to enter before coal dust firing spout in the environment of severe depletion of oxygen by high temperature pyrolysis, ignition in advance, increase the burnout rate of coal dust, produce substantial amounts of carbon monoxide and enter coal-fired face-fired boiler burner hearth, the amount of oxygen of coal-fired face-fired boiler lower furnace portion combustion zone institute proportioning burns required amount of oxygen completely less than coal dust, thus suppression and the generation of nitrogen oxides reduction, thered is provided enough oxygen in coal-fired face-fired boiler upper furnace region by burnt wind spout, further ensure burning of coal dust.
The art of this patent combines the feature of classification low-NO_x combustion technology, it is achieved that deeply staged combustion, it is to avoid coal dust firing shortcoming not to the utmost；While reducing nitrogen oxides, reduce boiler flyash carbon content；With high content of technology, technical difficulty is little, simple to operate, requires little to boiler regulation and control, it is possible to adapt to boiler working condition and the change of ature of coal；In sum, this technology solves current gas denitrifying technology, classification low-NO_x combustion technology key, a general character difficult problem in terms of coal-fired electric generation furnace reduces nitrogen oxides.
Accompanying drawing illustrates:
Fig. 1 is principle of the invention schematic diagram
Detailed description of the invention
:
A kind of method applying to coal-fired face-fired boiler reduction nitrogen oxides as shown in Figure 1, one or more layers First air coal dust firing spout (2) is installed in the bottom tying up to coal-fired face-fired boiler front wall (1), on the top of coal-fired face-fired boiler front wall (1), one or more layers burnt wind spout (3) is installed, after coal-fired face-fired boiler, one or more layers First air coal dust firing spout (2) is installed in the bottom of wall (4), after coal-fired face-fired boiler, one or more layers burnt wind spout (3) is installed on the top of wall (4), carbon monoxide is at the suppression of coal-fired face-fired boiler burner hearth (5) lower combustion region and nitrogen oxides reduction, carbon monoxide fully burns at coal-fired face-fired boiler burner hearth (1) upper area.
Coal dust is made to enter First air coal dust firing spout (2) front, by high temperature pyrolysis in the environment of severe depletion of oxygen, ignition in advance, increase the burnout rate of coal dust, produce substantial amounts of carbon monoxide and enter coal-fired face-fired boiler burner hearth (5), the amount of oxygen of institute of coal-fired face-fired boiler burner hearth (5) lower combustion district proportioning burns required amount of oxygen completely less than coal dust, thus suppression and the generation of nitrogen oxides reduction, thered is provided enough oxygen at coal-fired face-fired boiler burner hearth (5) upper area by burnt wind spout (3), further ensure burning of coal dust.
Principle and the feature of the present invention are: combine the feature of classification low-NO_x combustion technology, it is achieved that deeply staged combustion, it is to avoid coal dust firing shortcoming not to the utmost；While reducing nitrogen oxides, reduce boiler flyash carbon content；With high content of technology, technical difficulty is little, simple to operate, requires little to boiler regulation and control, it is possible to adapt to boiler working condition and the change of ature of coal；In sum, this technology solves current gas denitrifying technology, classification low-NO_x combustion technology key, a general character difficult problem in terms of coal-fired electric generation furnace reduces nitrogen oxides.
Above enforcement; it it is only the general description to the present invention; not the scope of the present invention is defined; on the premise of designing spirit without departing from the present invention; anyone the various deformation making technical scheme and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (4)
1. one kind applies to the method that coal-fired face-fired boiler reduces nitrogen oxides, it is characterized in that, in the bottom of coal-fired face-fired boiler front wall (1), one or more layers First air coal dust firing spout (2) is installed, on the top of coal-fired face-fired boiler front wall (1), one or more layers burnt wind spout (3) is installed, after coal-fired face-fired boiler, one or more layers First air coal dust firing spout (2) is installed in the bottom of wall (4), and after coal-fired face-fired boiler, one or more layers burnt wind spout (3) is installed on the top of wall (4).
A kind of method applying to coal-fired face-fired boiler reduction nitrogen oxides, it is characterized in that coal dust is front through First air coal dust firing spout (2), in anaerobic environment, ignition has the most been shifted to an earlier date in pulverized coal channel, produce a large amount of carbon monoxide, carbon monoxide fully burns at coal-fired face-fired boiler burner hearth (1) upper area at the suppression of coal-fired face-fired boiler burner hearth (5) lower combustion region and nitrogen oxides reduction, carbon monoxide.
A kind of method applying to coal-fired face-fired boiler reduction nitrogen oxides, it is characterised in that the amount of oxygen of institute of face-fired boiler burner hearth (5) lower combustion district proportioning burns required amount of oxygen completely less than coal dust.
A kind of method applying to coal-fired face-fired boiler reduction nitrogen oxides, it is characterized in that the oxygen of face-fired boiler burner hearth (5) upper area institute proportioning is provided by burnt wind spout (3), amount of oxygen burns required amount of oxygen completely more than or equal to coal dust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510378006.7A CN106322366A (en) | 2015-07-01 | 2015-07-01 | Oxynitride reduction method applied to fuel coal opposed firing boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510378006.7A CN106322366A (en) | 2015-07-01 | 2015-07-01 | Oxynitride reduction method applied to fuel coal opposed firing boiler |
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| Publication Number | Publication Date |
|---|---|
| CN106322366A true CN106322366A (en) | 2017-01-11 |
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|---|---|---|---|
| CN201510378006.7A Pending CN106322366A (en) | 2015-07-01 | 2015-07-01 | Oxynitride reduction method applied to fuel coal opposed firing boiler |
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| Country | Link |
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| CN (1) | CN106322366A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278594A (en) * | 2017-12-25 | 2018-07-13 | 辽宁中电投电站燃烧工程技术研究中心有限公司 | The method that the overcritical lignite direct current cookers of 600MW mix fired biomass gasification burning |
| CN111365732A (en) * | 2020-02-28 | 2020-07-03 | 广东电科院能源技术有限责任公司 | Hedging boiler over-fire air self-adaptive control method, system and equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1155846A (en) * | 1965-09-29 | 1969-06-25 | Foster Wheeler Ltd | Improvements in or relating to Furnaces |
| CN1324999A (en) * | 2000-05-19 | 2001-12-05 | 普莱克斯技术有限公司 | NOx reduction using coal based reburning |
| CN201925914U (en) * | 2010-10-29 | 2011-08-10 | 烟台龙源电力技术股份有限公司 | Over-fire air spout layout structure |
| CN203454111U (en) * | 2013-07-30 | 2014-02-26 | 国电科学技术研究院 | Novel near-wall air device for front and rear wall opposed firing boiler |
| CN203656909U (en) * | 2013-12-05 | 2014-06-18 | 东方电气集团东方锅炉股份有限公司 | Front-rear wall type opposed firing boiler |
-
2015
- 2015-07-01 CN CN201510378006.7A patent/CN106322366A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1155846A (en) * | 1965-09-29 | 1969-06-25 | Foster Wheeler Ltd | Improvements in or relating to Furnaces |
| CN1324999A (en) * | 2000-05-19 | 2001-12-05 | 普莱克斯技术有限公司 | NOx reduction using coal based reburning |
| CN201925914U (en) * | 2010-10-29 | 2011-08-10 | 烟台龙源电力技术股份有限公司 | Over-fire air spout layout structure |
| CN203454111U (en) * | 2013-07-30 | 2014-02-26 | 国电科学技术研究院 | Novel near-wall air device for front and rear wall opposed firing boiler |
| CN203656909U (en) * | 2013-12-05 | 2014-06-18 | 东方电气集团东方锅炉股份有限公司 | Front-rear wall type opposed firing boiler |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278594A (en) * | 2017-12-25 | 2018-07-13 | 辽宁中电投电站燃烧工程技术研究中心有限公司 | The method that the overcritical lignite direct current cookers of 600MW mix fired biomass gasification burning |
| CN111365732A (en) * | 2020-02-28 | 2020-07-03 | 广东电科院能源技术有限责任公司 | Hedging boiler over-fire air self-adaptive control method, system and equipment |
| CN111365732B (en) * | 2020-02-28 | 2021-09-14 | 南方电网电力科技股份有限公司 | Hedging boiler over-fire air self-adaptive control method, system and equipment |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 400050 9, 20 West Branch Road, Yangjiaping, Kowloon Po, Chongqing. Applicant after: Chongqing Polytron Technologies Inc Address before: 400050 9, 20 West Branch Road, Yangjiaping, Kowloon Po, Chongqing. Applicant before: CHONGQING FURAN TECHNOLOGY CO., LTD. |
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170111 |