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低氮燃烧器有哪些类型

作者: 西安燃烧器厂家电 来源: 未知 时间: 2020-06-24 浏览次数:
一、NOx氮氧化物的生成机制 对于自然气汽锅来说,Nox的发生首要来自空气中的氮气和过量氧气发生的热力型Nox,热力型NOx的发生和燃烧的温度呈指数型关系,平日在燃烧温度高于1000摄氏

一、NOx氮氧化物的生成机制
对于自然气汽锅来说,Nox的发生首要来自空气中的氮气和过量氧气发生的热力型Nox,热力型NOx的发生和燃烧的温度呈指数型关系,平日在燃烧温度高于1000摄氏度的时候起头发生,而在1400度以上NOx的生成速度会急剧增加。下图反映的是燃煤型汽锅的NOx排放和温度的关系,此中热力型Nox的温度关系同样适合于自然气汽锅燃烧器。
燃煤型汽锅的NOx排放和温度的关系基于以上NOx的生长机制,低氮燃烧器的节制NOx的手艺也首要着眼于两个偏向:
1、降低火焰温度;
2、降低氧含量。
The formation mechanism of NOx nitrogen oxides
For natural gas boilers, the production of Nox mainly comes from the thermodynamic Nox produced by nitrogen in the air and excessive oxygen. The production of thermodynamic Nox has an exponential relationship with the combustion temperature, which usually starts when the combustion temperature is higher than 1000 degrees Celsius, and the generation speed of Nox above 1400 degrees will increase sharply. The figure below reflects the relationship between NOx emission and temperature of coal-fired boilers, in which the temperature relationship of thermal NOx is also suitable for natural gas boiler burners.
The relationship between NOx emission and temperature of coal-fired boilers is based on the growth mechanism of NOx mentioned above. The technology of controlling NOx of low-nitrogen burners also focuses on two directions:
1. Reduce the flame temperature;
2. Reduce oxygen content.


低氮燃烧器


二、低氮燃烧器和超低氮燃烧器类型
传统的自然气汽锅燃烧器每每的NOx排放在120~150毫克阁下。低氮燃烧器平日是指NOx排放在30~80毫克的燃烧器。NOx排放在30毫克以下的平日称为超低氮燃烧器。
传统的燃烧器的高NOx排放首要源于下述几个原因:
1、为了包管燃烧充裕,采用了较大的过量空气;
2、燃烧温度平常在1800度摆布。
Types of low-nitrogen and ultra-low nitrogen burners
Conventional gas boiler burners typically emit about 120 to 150 milligrams of NOx. Low nitrogen burners are usually defined as NOx burners that discharge between 30 and 80 mg. NOx emissions below 30 mg are commonly known as ultra-low nitrogen burners.
The high NOx emission of traditional burners is mainly caused by the following reasons:
1. In order to ensure sufficient combustion, large excess air is used.
2. The combustion temperature is usually around 1800 degrees.


三、低氮燃烧器三、低氮燃烧器凡是基于下列手艺
1.电子比例调节和氧含量节制手艺;来正确节制氧含量;
2.FGR烟气再轮回手艺,来降低火焰温度和氧含量;
3.全预混的外观燃烧手艺来降低火焰温度和实现充裕燃烧;
上述手艺中,平常是低氮燃烧器的必需设置。基于上述手艺,市场的低氮燃烧器首要分为以下类型:
Low nitrogen burners low nitrogen burners are usually based on the following technologies
1. Electronic proportional regulation and oxygen content control technology; To precisely control the oxygen content;
2.FGR flue gas recirculation technology to reduce flame temperature and oxygen content;
3. Fully premixed surface combustion technology to reduce flame temperature and achieve full combustion;
In the above technology, it is usually necessary to configure the low nitrogen burner. Based on the above technology, the market for low-nitrogen burners is mainly divided into the following types:


四、各低氮燃烧器优错误介绍
1、FGR低氮燃烧器
FGR低氮燃烧器凡是可以将NOx在全火规模内掌握到65毫克,极限大约在40毫克阁下,进一步降低NOx排放可能导致燃烧不不变,或者牺牲可调比等坏处。
2、外观燃烧超低氮燃烧器
外观燃烧超低氮燃烧器平常或许将NOx在全火局限内节制到30毫克以内,其长处是安装简洁,不需要FGR烟气再轮回管道;其首要错误是需要过滤空气,加大了维护工作量;同时氧含量在7%阁下,降低了部门燃烧效率。
3、外观燃烧+FGR超低氮燃烧器
概况燃烧+FGR超低氮燃烧器连系了轮廓燃烧的NOx掌握长处和FGR降氧含量长处,能够实此刻全火局限节制NOx到20毫克水平,同时掌握氧含量在3%以内,最大化燃烧效率。其首要短处是设备成本提高。
The advantages and disadvantages of each low nitrogen burner are introduced
1. FGR low nitrogen burner
FGR low nitrogen burners can usually control NOx to 65 mg in full fire range with a limit of about 40 mg. Further reduction of NOx emissions may lead to combustion instability or sacrifice of adjustable ratio and other disadvantages.
2. Ultra-low nitrogen combustion burner is burned on the surface Surface combustion ultra-low nitrogen burners can usually control NOx within 30 mg of full fire range. Its main drawback is the need to filter the air, increased maintenance work; At the same time, the oxygen content is around 7%, which reduces the partial combustion efficiency.
3. Surface combustion +FGR ultra-low nitrogen burner
The surface combustion +FGR ultra-low nitrogen burner combines the advantages of NOx control of surface combustion with the advantages of reducing oxygen content of FGR. It can control the level of NOx to 20 mg in the whole fire range and the content of oxygen within 3% to maximize the combustion efficiency. Its main shortcoming is the increase of equipment cost.


若是想领会更多关于低氮燃烧器相关常识,请咨询西安众诚永源节能环保手艺有限公司
For more information on low nitrogen burners, please consult Beijing chuangwei electromechanical equipment co., LTD.


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