CN105351963A - Low-nitrogen combustion device based on brown coal - Google Patents
Low-nitrogen combustion device based on brown coal Download PDFInfo
- Publication number
- CN105351963A CN105351963A CN201510823514.1A CN201510823514A CN105351963A CN 105351963 A CN105351963 A CN 105351963A CN 201510823514 A CN201510823514 A CN 201510823514A CN 105351963 A CN105351963 A CN 105351963A
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- China
- Prior art keywords
- air
- brown coal
- pipeline
- low nitrogen
- nitrogen combustion
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L1/00—Passages or apertures for delivering primary air for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a low-nitrogen combustion device based on brown coal. The low-nitrogen combustion device comprises a primary air supply device, a secondary air supply device and a first channel. The primary air supply device is connected with a combustor through a first pipeline. The first pipeline is connected with an over fire air cavity through a first branch. The secondary air supply device is connected with the over fire air cavity through a second pipeline, and the second pipeline is connected with the combustor through a third pipeline. The first channel is provided with a heater and used for increasing the primary air temperature. According to the device, a heating device is additionally arranged in a primary air flue, the proportion relation of various kinds of air supply is adjusted, the combustion stability and temperature of pulverized powder particles can be effectively ensured when high-moisture brown coal is combusted, the primary air rate is increased, and the defect that a traditional low-nitrogen improvement effect is not obvious is overcome.
Description
Technical field
The invention belongs to pulverized coal combustion, be specifically related to a kind of low nitrogen combustion apparatus based on brown coal.
Background technology
Energy-saving and emission-reduction have been important topics of society, especially desulfurization and denitration.For controlling the NOx pollutant emission level of coal fired thermal power plant; China issues in succession " fossil-fuel power plant atmospheric pollutant emission standard ", " People's Republic of China's atmosphere pollution Protection Code ", the standard and statute such as " fossil-fuel power plant atmospheric pollutant emission standard ", requires that the thermal power plant control NOX that takes measures discharges.Due to the raising of national environmental standard, stricter to the NOX discharge standard of boiler.
For different atures of coal, combustion characteristics is not quite similar, and the difficulty of low nitrogen transformation is also different, and wherein the boiler of combusting brown coal is large due to ature of coal water content, causes traditional Researched of Air Staging Combustion Burning Pulverized Coal effect poor.
Summary of the invention
The object of the present invention is to provide a kind of low nitrogen combustion apparatus based on brown coal, this device by setting up heater in an air channel, and the accounting relation regulating each to blow, when effectively can overcome burning high water content brown coal, ensure the stable of burning, ensure the temperature of pulverized coal particle, strengthen primary air ratio, solve the not obvious shortcoming of traditional low nitrogen correctional effect.
Based on a low nitrogen combustion apparatus for brown coal, comprising:
First air air-supply arrangement, described First air air-supply arrangement is connected with burner by the first pipeline, and described first pipeline is connected with burnout degree chamber by the first branch road,
Secondary Air air-supply arrangement, described Secondary Air air-supply arrangement is connected with burnout degree chamber by second pipe, and described second pipe connects burner by third channel;
Described first passage is provided with heater, for improving First air temperature.
In a preferred embodiment of the invention, the ratio that the described First air sent into by First air air-supply arrangement accounts for total blast volume is 40%-50%, and the ratio that the described Secondary Air sent into by Secondary Air air-supply arrangement accounts for total blast volume is 50%-60%.
In a preferred embodiment of the invention, in described Secondary Air, accounting rate is that the air quantity of 20%-30% is delivered in burnout degree chamber and used as burnout degree.
In a preferred embodiment of the invention, described heater is fixedly connected on the air channel wall of described first pipeline by flange.
In a preferred embodiment of the invention, described heater is arranged at the front portion of first passage and the first branch road junction.
In a preferred embodiment of the invention, described heater comprises the igniter that is positioned at heater body one end, and one is disposed adjacent the fuel gas inlet in described igniter, and the stable flame cylinder of a described igniter of connection and described fuel gas inlet; The central point of described igniter and described stable flame cylinder is positioned on same axis.
In a preferred embodiment of the invention, described fuel gas inlet is perpendicular to described igniter.
By technique scheme, the invention has the beneficial effects as follows:
The present invention sets up heater to improve a wind-warm syndrome in boiler air channel, effectively primary air flow is reduced under ensureing the prerequisite of igniting temperature of pulverized-coal, for vertical air fractional combustion provides space, efficiently solve the problem of the boiler low nitrogen transformation difficulty of burning high water content brown coal.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is operation principle of the present invention.
Fig. 2 is the structure chart of heater of the present invention.
Detailed description of the invention
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
As shown in Figure 1, the boiler of combusting brown coal is in order to ensure the stable of burning, and primary air ratio is comparatively large, and the low nitrogen remodeling method of conventional vertical air classification is owing to dividing wind-force degree limited, and low nitrogen correctional effect is not good.At this moment in-builtly in air channel establish heater, improve First air temperature, while guarantee combustion stability, significantly can reduce primary air ratio, point wind transformed for low nitrogen provides enough spaces.
Particularly based on a low nitrogen combustion apparatus for brown coal, comprising: First air air-supply arrangement, described First air air-supply arrangement is connected with burner by the first pipeline, and described first pipeline is connected with burnout degree chamber by the first branch road; Secondary Air air-supply arrangement, described Secondary Air air-supply arrangement is connected with burnout degree chamber by second pipe, and described second pipe connects burner by third channel; Described first passage is provided with heater, for improving First air temperature.
Usually, heater is fixedly connected on the air channel wall of described first pipeline by flange, and needs the front portion being arranged at first passage and the first branch road junction.
Open duct insert heater during work, Proper Match primary air flow and after-flame air quantity, reach low nitrogen effect simultaneously.The boiler of usual combusting brown coal, the ratio that First air accounts for total blast volume is 40%-50%, and the ratio that Secondary Air accounts for total blast volume is 50%-60%.In order to there be good low nitrogen effect, need to do vertical air classification, namely a part of Secondary Air is separated as burnout degree, this burnout degree accounts for the ratio of Secondary Air total blast volume is usually 20%-30%, but because the First air ratio of combusting brown coal is larger, Secondary Air ratio is less, in order to ensure smooth combustion, causes point wind energy power very limited, so need First air heater, reduce primary air ratio while ensureing smooth combustion, supplement burnout degree rate, realize low nitrogen effect.
After heater, separate a part as burnout degree, Secondary Air also separates a part as burnout degree, and object conventional falls nitrogen.
With reference to Fig. 2, heater comprises an igniter 1, being positioned at heater body one end and is disposed adjacent fuel gas inlet 2 in described igniter, and the stable flame cylinder 3 that connects described igniter and described fuel gas inlet; The central point of described igniter and described stable flame cylinder is positioned on same axis; Described fuel gas inlet is perpendicular to described igniter.
Adopt certain boiler of burning high-moisture brown coal of the present invention, current system run all right is reliable, and denitration efficiency is 56%.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (7)
1. based on a low nitrogen combustion apparatus for brown coal, it is characterized in that, comprising:
First air air-supply arrangement, described First air air-supply arrangement is connected with burner by the first pipeline, and described first pipeline is connected with burnout degree chamber by the first branch road,
Secondary Air air-supply arrangement, described Secondary Air air-supply arrangement is connected with burnout degree chamber by second pipe, and described second pipe connects burner by third channel;
Described first passage is provided with heater, for improving First air temperature.
2. a kind of low nitrogen combustion apparatus based on brown coal according to claim 1, it is characterized in that, the ratio that the described First air sent into by First air air-supply arrangement accounts for total blast volume is 40%-50%, and the ratio that the described Secondary Air sent into by Secondary Air air-supply arrangement accounts for total blast volume is 50%-60%.
3. a kind of low nitrogen combustion apparatus based on brown coal according to claim 2, is characterized in that, in described Secondary Air, accounting rate is that the air quantity of 20%-30% is delivered in burnout degree chamber and used as burnout degree.
4. a kind of low nitrogen combustion apparatus based on brown coal according to claim 1, is characterized in that, described heater is fixedly connected on the air channel wall of described first pipeline by flange.
5. a kind of low nitrogen combustion apparatus based on brown coal according to claim 4, is characterized in that, described heater is arranged at the front portion of first passage and the first branch road junction.
6. a kind of low nitrogen combustion apparatus based on brown coal according to any one of claim 1-5, it is characterized in that, described heater comprises the igniter that is positioned at heater body one end, one is disposed adjacent the fuel gas inlet in described igniter, and the stable flame cylinder of a described igniter of connection and described fuel gas inlet; The central point of described igniter and described stable flame cylinder is positioned on same axis.
7. a kind of low nitrogen combustion apparatus based on brown coal according to claim 6, it is characterized in that, described fuel gas inlet is perpendicular to described igniter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510823514.1A CN105351963A (en) | 2015-11-24 | 2015-11-24 | Low-nitrogen combustion device based on brown coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510823514.1A CN105351963A (en) | 2015-11-24 | 2015-11-24 | Low-nitrogen combustion device based on brown coal |
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| Publication Number | Publication Date |
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| CN105351963A true CN105351963A (en) | 2016-02-24 |
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| CN201510823514.1A Pending CN105351963A (en) | 2015-11-24 | 2015-11-24 | Low-nitrogen combustion device based on brown coal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966590A (en) * | 2019-12-04 | 2020-04-07 | 国网浙江省电力有限公司电力科学研究院 | Primary and secondary air coupling jet system and operation method thereof |
Citations (7)
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|---|---|---|---|---|
| JPH0814505A (en) * | 1994-06-24 | 1996-01-19 | Babcock Hitachi Kk | Method and apparatus for burning low nox of boiler |
| CN1719103A (en) * | 2004-07-06 | 2006-01-11 | 通用电气公司 | Methods and systems for operating combustion systems |
| CN101782237A (en) * | 2010-03-09 | 2010-07-21 | 西安热工研究院有限公司 | Medium-speed coal-mill direct-firing pulverizing combustion system for burning high-moisture lignite |
| CN103134050A (en) * | 2013-03-07 | 2013-06-05 | 上海锅炉厂有限公司 | Multi-coal low-nitrogen pulverized coal combustion device with gap wind |
| CN203223912U (en) * | 2013-04-15 | 2013-10-02 | 黄立新 | Intermediate storage type super nitrogen reduction system for coal-fired boiler coal mill |
| CN103925606A (en) * | 2014-04-04 | 2014-07-16 | 西安西热锅炉环保工程有限公司 | High-moisture lignite medium-speed coal mill pulverizing system heating primary air through coal gas burning |
| CN204611743U (en) * | 2015-03-06 | 2015-09-02 | 烟台龙源电力技术股份有限公司 | Boiler controller system |
-
2015
- 2015-11-24 CN CN201510823514.1A patent/CN105351963A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0814505A (en) * | 1994-06-24 | 1996-01-19 | Babcock Hitachi Kk | Method and apparatus for burning low nox of boiler |
| CN1719103A (en) * | 2004-07-06 | 2006-01-11 | 通用电气公司 | Methods and systems for operating combustion systems |
| CN101782237A (en) * | 2010-03-09 | 2010-07-21 | 西安热工研究院有限公司 | Medium-speed coal-mill direct-firing pulverizing combustion system for burning high-moisture lignite |
| CN103134050A (en) * | 2013-03-07 | 2013-06-05 | 上海锅炉厂有限公司 | Multi-coal low-nitrogen pulverized coal combustion device with gap wind |
| CN203223912U (en) * | 2013-04-15 | 2013-10-02 | 黄立新 | Intermediate storage type super nitrogen reduction system for coal-fired boiler coal mill |
| CN103925606A (en) * | 2014-04-04 | 2014-07-16 | 西安西热锅炉环保工程有限公司 | High-moisture lignite medium-speed coal mill pulverizing system heating primary air through coal gas burning |
| CN204611743U (en) * | 2015-03-06 | 2015-09-02 | 烟台龙源电力技术股份有限公司 | Boiler controller system |
Non-Patent Citations (1)
| Title |
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| 西安热工研究院: "《火电厂SCR烟气脱硝技术》", 28 February 2013, 中国电力出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966590A (en) * | 2019-12-04 | 2020-04-07 | 国网浙江省电力有限公司电力科学研究院 | Primary and secondary air coupling jet system and operation method thereof |
| CN110966590B (en) * | 2019-12-04 | 2021-08-03 | 国网浙江省电力有限公司电力科学研究院 | Primary and secondary air coupled jet system and its operation method |
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Application publication date: 20160224 |
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| RJ01 | Rejection of invention patent application after publication |