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低氮燃烧器如何选择

作者: 西安工业燃烧器 来源: 未知 时间: 2020-06-24 浏览次数:
低氮燃烧器若何选择? 若何选择低氮燃烧器?令很多厂家有些时候不知所措。下面小编从低氮燃烧器的类型、选择低氮燃烧器考虑的身分,来给人人解答低氮燃烧器若何选择? How to c

低氮燃烧器若何选择?
若何选择低氮燃烧器?令很多厂家有些时候不知所措。下面小编从低氮燃烧器的类型、选择低氮燃烧器考虑的身分,来给人人解答低氮燃烧器若何选择?
How to choose a low nitrogen burner?
How to choose a low nitrogen burner? Many manufacturers are sometimes at a loss. Below small small make up from the type of low nitrogen burner, choose the factor that low nitrogen burner considers, answer to everybody how low nitrogen burner chooses?

一、低氮燃烧器的类型
Type of low nitrogen burner

燃烧器是工业燃油汽锅、燃气汽锅上面的的主要设备,它包管燃料不乱着火燃烧和燃料的完全燃烧等过程,是以,要按捺NOx的生成量就必需从燃烧器入手。按照降低NOx的燃烧手艺,低氮氧化物燃烧器大致分为以下几类:
Burner is an important equipment in industrial fuel boiler and gas boiler, which ensures the stable ignition of fuel and the complete combustion of fuel. Therefore, to suppress the production of NOx, it must start with burner. According to the combustion technology of reducing NOx, low-nitrogen oxide burners are generally divided into the following categories:

1.低NOx预燃室燃烧器
1. Low NOx precombustion chamber burner

预燃室是近10年来我国开发研究的一种高效率、低NOx分级燃烧手艺,预燃室普通由一次风(或二次风)和燃料喷射系统等构成,燃料和一次风快速夹杂,在预燃室内一次燃烧区形成富燃料夹杂物,因为缺氧,只是部门燃料进行燃烧,燃料在贫氧和火焰温度较低的一次火焰区内析出挥发分,是以削减了NOx的生成。
Precombustion chamber development research in China in recent 10 years is a kind of high efficiency and grade of low NOx combustion technology, generally speaking, a precombustion chamber of the wind or secondary air and fuel injection system, etc, the mixed fuel and a wind, in a form in the combustion zone precombustion indoor fuel mixture, due to the lack of oxygen, is only part of the fuel combustion, fuel in poor oxygen and low flame temperature of a flame volatile precipitation in the area, thereby reducing NOx formation.

2.阶段燃烧器
 2. Stage burner

凭据分级燃烧道理设计的阶段燃烧器,使燃料与空气分段夹杂燃烧,因为燃烧偏离理论当量比,故可降低NOx的生成。
The phase burner designed according to the principle of graded combustion makes the fuel and air burn in different stages. As the combustion deviates from the theoretical equivalence ratio, the generation of NOx can be reduced.

3.自身再轮回燃烧器
3. Self recirculation burner

一种是行使助燃空气的压头,把部门燃烧烟气吸回,进入燃烧器,与空气夹杂燃烧。因为烟气再轮回,燃烧烟气的热容量大,燃烧温度降低,NOx削减。
One is to use the pressure head of combustion-supporting air to absorb part of the burning smoke back into the burner and burn it with the air. Due to the recirculation of flue gas, the heat capacity of flue gas is large, the combustion temperature is reduced, and NOx is decreased.

另一种自身再轮回燃烧器是把部门烟气直接在燃烧器内进入再轮回,并到场燃烧过程,此种燃烧器有按捺氧化氮和节能双重结果。
Another kind of self-recirculation burner is to put part of the flue gas into the recirculation directly in the burner and add the combustion process. This kind of burner has the dual effect of inhibiting nitrogen oxide and saving energy.

4.浓淡型燃烧器
4. Thick and light type burner

其道理是使一部门燃料作过浓燃烧,另一部门燃料作过淡燃烧,但整体上空气量连结不变。因为两部门都在偏离化学当量比下燃烧,因而NOx都很低,这种燃烧又称为偏离燃烧或非化学当量燃烧。
The idea is that some of the fuel is burned too much, and some of the fuel is burned too little, but the total amount of air over the air remains the same. Since both parts are burning away from the chemical equivalence ratio, the NOx is very low, which is also called deviation combustion or non-chemical equivalent combustion.

5.朋分火焰型燃烧器
5. Split flame burner

其道理是把一个火焰分成数个小火焰,因为小火焰散热面积大,火焰温度较低,使"热回响NO"有所下降。此外,火焰小缩短了氧、氮等气体在火焰中的停留时间,对"热回响NO"和"燃料NO"都有显着的按捺感化。
The principle is to divide a flame into several small flames. As the small flame has a large heat dissipation area and a low flame temperature, the "heat reaction NO" decreases. In addition, the small flame shortens the residence time of oxygen, nitrogen and other gases in the flame, and has obvious inhibition effect on both "heat reaction NO" and" fuel NO".

6.夹杂促进型燃烧器
6. Mixed accelerator burner

烟气在高温区停留时间是影响NOx生成量的首要身分之一,改善燃烧与空气的夹杂,可以使火焰面的厚度减薄,在燃烧负荷不变的情形下,烟气在火焰面即高温区内停留时间缩短,因而使NOx的生成量降低。夹杂促进型燃烧器就是按照这种道理设计的。
The residence time of flue gas in the high temperature area is one of the main factors influencing NOx production. Improving the mixture of combustion and air can reduce the thickness of the flame surface. The mixed - boost burner is designed according to this principle.

低氮燃烧器

二、低氮燃烧器选择考虑的首要参数
2. Main parameters considered in the selection of low nitrogen burner

1、可调比
1. Adjustable ratio

采用了电子比例调节的低氮燃烧器凡是应该具备至少5:1以上的高可调比。更低的可调比意味实在际运行过程中更多的ON/Off启停,同时也意味着更多的自然气耗损。除非是负荷常年在一个斗劲小的不变区间的汽锅,选择一个高可调比的燃烧器对于降低自然气的消费,降低运行成本,耽误设备的使用寿命非常主要。
Low nitrogen burners with electronic proportional regulation should usually have a high adjustable ratio of at least 5 to 1. A lower tunable ratio means more ON/Off stops during the actual operation and more gas consumption. Unless it is a boiler loaded in a relatively small stable range all year round, it is important to select a high adjustable ratio burner to reduce gas consumption, reduce operating costs, and extend the service life of the equipment.

2、NOx排放
2. NOx emission

必需知足国度和处所的环保排放要求,在知足要求的前提下,从企业的社会责任角度出发,尽量应该选择NOx排放更低的设备;
It is necessary to meet the requirements of national and local environmental protection emissions. On the premise of meeting the requirements, from the perspective of corporate social responsibility, the equipment with lower NOx emissions should be selected as far as possible.

3、尾氧含量
3. Tail oxygen content

为了达到充实燃烧的极限过剩空气系数为大约1.1,对应的理论尾氧含量为大约2%.更高的尾氧含量平日意味着燃烧器效率的降低。幻想的燃烧器最好尾氧含量能够掌握在3%以内;市场上外面燃烧的燃烧器的尾氧含量平日在7%摆布,相对于3%的尾氧含量,意味着发生不异的热量,需要多花消大约6~8%的自然气。对于常年运转或者设备恒久在较高负荷运转,自然气损耗量较量大的业主,选择一款尾氧含量低的燃烧器对于降低运行成本至关主要。
In order to reach the maximum excess air coefficient of full combustion, which is about 1.1, the theoretical tail oxygen content is about 2%. A higher tail oxygen content usually means a reduction in burner efficiency. The optimal tail oxygen content of the ideal burner can be controlled within 3%. The tail-oxygen content of combustion burners on the market's surface is usually around 7%, which means the same amount of heat is produced, compared with 3% of tail-oxygen content, which requires about 6-8% more natural gas to be consumed. For the owners who operate all year round or whose equipment is under high load for a long time and whose natural gas consumption is relatively high, it is very important to select a burner with low tail oxygen content to reduce the operating cost.

4、其它首要考虑身分
4. Other major considerations

燃烧不乱性是选择低氮燃烧器的首要考虑身分,包孕设备自己的靠得住性。从燃烧不变性的角度考虑,对于采用FGR手艺的低氮燃烧器,需要希奇存眷FGR烟气再轮回比例,过大的比例意味着燃烧极易不不乱,或者对于设备的手艺和节制水平有对照苛刻的要求。 Combustion stability is the main consideration for selecting low nitrogen burners, including the reliability of the equipment itself. From the perspective of combustion stability, for low nitrogen burners using FGR technology, special attention should be paid to the ratio of flue gas recirculation of FGR. Too large a proportion means that the combustion is easy to be unstable, or there are strict requirements on the technology and control level of the equipment.

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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