煙管受熱面 的英文怎麼說
中文拼音 [yānguǎnshòurèmiàn]
煙管受熱面
英文
flue heating surface-
For long - term protection of heated pipelines, exhaust pipes, smoke stacks and other heated surfaces up to 550 - 600
長期保護加熱管道、排氣管道、煙囪及其它溫度可高達550 - 600的受熱面。It tell us : the abrasive capability of fly ash ; the similar calculation of ash erosion ; the calculation of ash erosion in the tube in turn and tube out of turn ; the reason of tube abrasion for gas flue ; the influence of air parameter for fly ash erosion ; the influence of changing temperature ; the influence of the flue gas composition, etc. next, it advances the solving measure ; reduce the flue gas velocity ; reduce the concentration of fly ash ; responsible construction : replace smooth tube with spiral tube ; use the new material of abrasion ; fuel desulfurization ; reduce so3 of flue gas ; raise flue gas temperature, making it up the dew point ; use the abrasion - resistance material to resist abrasion
討論了飛灰磨損性能、管壁受飛灰沖蝕的近似計算、灰粒對順列管和錯列管的磨損計算、煙氣走廊引起對流管束的磨損機理、空氣動力參數對飛灰沖蝕的影響以及受熱面壁溫變化及煙氣成份對飛灰磨損的影響等問題。接著提出了解決的措施：降低平均煙氣流速；降低飛灰濃度；使用鰭片管、螺旋翅片管代替光管；選擇合適的結構及排列方式，減少煙氣中so3的含量；提高受熱面壁溫使之大於煙氣的露點溫度；採用抗腐蝕材料作受熱面等防腐蝕的措施。There will appear a very uneven flow field, and appear a very big velocity magnitude distribution and ash concentration distribution near back wall. thus, the velocity magnitude is far bigger than that of optimal design velocity magnitude, which will lead to serious wear and tear in metal face of heater. especially, because of curve structure in front of heat pipe air preheater, there is more serious wear and tear
由於靠近豎井后墻面的煙氣流速很大，飛灰濃度也較大，斷面速度分佈的最大速度大於最佳設計速度的2 - 3倍，這樣將造成受熱面的嚴重磨損，特別是熱管空氣預熱器前端煙道的幾何結構有一定的轉角，更增加了磨損的程度。There come two questions when the temperature of gas is low. one is that metal consumed in air pre - heater is relatively more, due to lower temperature press and heat transfer coefficient. the other is that corrosion of pipe result from so2, which exists in gas
由於煙氣溫度低而產生了兩個問題：一個是傳熱溫壓小，管子所用金屬的消耗量相對比較多；另一個是受熱面的管內側金屬壁面容易出現低溫腐蝕。分享友人