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          1. 首頁 > 新聞資訊 > 公司新聞 >

            簡述低氮燃燒器和普通燃燒器的優缺點

            時間:2018-08-24 12:04    作者:admin 返回列表

            最近有客戶找到我們北京眾誠永源節能環保技術有限公司,咨詢低氮燃燒器和普通燃燒器的優缺點,針對這一問題,我們的技術人員給出了以下解答。 Recently, a customer found us Beijing Chuangwei, consulting low nitrogen burner and ordinary burner advantages and disadvantages, in view of this problem, our technical personnel gave the following answers.

            一、優點:
            First, advantages:

            1、由于拉伸了燃燒區域,減弱了部分燃燒強度,在一定時間內,抑制了NOx的形成。
            1. Because of stretching the combustion zone, the combustion intensity is weakened and the formation of NO_x is inhibited in a certain period of time.

            2、低負荷燃燒平穩。因為減少了下部風量,使燃料在低濃度燃燒時,也非常平穩。甚至可以做到40%負荷穩定燃燒。
            2, low load combustion stable. Because the air volume at the bottom is reduced, the fuel is also very stable when it burns at low concentration. It can even achieve 40% load stable combustion.

            3、低負荷時,爐膛火焰充滿度較好。水冷壁吸熱均勻。
            3, low load, furnace flame full degree is better. The water wall is uniform in heat absorption.
            簡述低氮燃燒器和普通燃燒器的優缺點

            二、缺點:
            Two, disadvantages:

            1、由于燃盡風位置,使大量的送風在離開爐膛都未參加燃燒,而這部分熱風也是從空預器吸收了大量熱量的,因此會造成排煙溫度過低的現象。尤其是在低負荷時。
            1. Because of the position of exhaust air, a large number of air supply does not participate in combustion when leaving the furnace, and this part of hot air also absorbs a large amount of heat from the air preheater, so it will cause the phenomenon of low exhaust temperature. Especially at low load.

            2、由于減弱了下部爐膛的進風量,使下二次風的托扶能力減弱,排渣量增加,排渣含碳量增加,尤其是高負荷時。
            2. Because of weakening the air inlet of the lower furnace, the supporting capacity of the lower secondary air is weakened, the slag discharge is increased, and the carbon content of the slag is increased, especially at high load.

            3、由于減弱了下部爐膛的進風,使風的剛性減弱,燃燒區域擴大,高負荷時,容易出現水冷壁結焦。
            3. Because of weakening the inlet air of the lower furnace, the rigidity of the air is weakened, the combustion area is enlarged, and the water wall is easy to coke at high load.

            4、由于爐膛下部缺氧燃燒,產生大量還原性氣體,使灰熔點降低,甚至造成冷渣斗都有結焦的現象。
            4. Because of the anoxic combustion in the lower part of the furnace, a large amount of reducing gas is produced, which makes the ash melting point lower and even causes the phenomenon of coking in the ash hopper.

            5、由于燃燒區域的拉伸,在高負荷時期,會造成過熱器超溫,減溫水量不足的現象,嚴重時,甚至造成屏過結焦。
            5. Due to the stretching of the combustion zone, the superheater will overheat and the cooling water will be insufficient during the high load period, and even cause the screen to be over-coked.

            6、由于大量還原性氣體和燃燒區域的擴大,使水冷壁中下部結焦嚴重,因脫焦造成的滅火、爆燃、損壞撈渣機現象都有發生。
            6. As a result of the expansion of a large number of reductive gases and combustion area, the coking in the middle and lower parts of the water wall is serious, and the phenomena of fire extinguishing, deflagration and damage to the dregs dredger caused by decoking all occur.

            7、由于高負荷時的結焦影響了水冷壁吸熱,使爐膛下部溫度上升,而燃盡風由于位置只能對爐膛上部的煙氣進行冷卻,而對下部爐膛溫度毫無影響,因此爐膛下部NOx的產生隨著結焦而增加,高負荷持續時間越長,減少NOx的效果就越小,甚至超出原有NOx量。
            7. Because the coking at high load affects the heat absorption of the water wall and the temperature of the lower part of the furnace rises, and the burnout air can only cool the flue gas at the upper part of the furnace, but has no effect on the temperature of the lower part of the furnace, the production of NO_x in the lower part of the furnace increases with the coking, the longer the duration of the high load is, the effect of reducing NO_x is reduced. The smaller, even beyond the original NOx.

            8、爐膛下部燃燒揮發分,上部燃燒焦炭的理論,和煤粉燃燒"揮發份析出→揮發份燃燒→焦炭燃燒→表殼灰分剝離,揮發分隨著表殼灰分的剝離不斷析出"的理論不相符。因此,高負荷時,大量煤粉的燃燒時間拉長,未完全燃燒的煤粉被帶入煙道。造成飛灰含碳量增加。
            8. The theory of burning volatile matter in the lower part of the furnace and burning coke in the upper part is inconsistent with the theory of "volatile matter precipitation, volatile matter burning, coke burning, ash peeling off from the surface shell, and volatile matter continuously precipitating out with ash peeling off from the surface shell" in pulverized coal combustion. Therefore, at high load, the combustion time of a large number of pulverized coal is lengthened, and the incompletely burned pulverized coal is taken into the flue. The carbon content of fly ash increases.

            低氮燃燒器,通過調節燃燒空氣和燃燒頭,可以獲得最佳的燃燒參數。希望對大家有所幫助。
            Low nitrogen burner can obtain the best combustion parameters by adjusting the combustion air and combustion head. We hope to help you.

            上一篇:低氮燃燒器的原理是什么 下一篇:安裝低氮燃燒器的必要性

            Copyright ? 2018 北京眾誠永源節能環保技術有限公司 專注于低氮燃燒器設計、改造、銷售和安裝。網站地圖   備案號:京ICP備10001485號-1

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