6th燃煤鍋爐脫硫除塵一體化工程設計-全文預覽
【正文】 t/h鍋爐的煙氣除塵脫硫上，是目前我國自行研制的處理煙氣量最大的除塵脫硫裝。文丘里除塵脫硫裝置：由收縮管、喉管和擴散管組成，當煙氣由進氣管道進入收縮管后，流速逐漸增大，氣體的壓能逐漸轉(zhuǎn)變?yōu)閯幽?；在喉管入口處，氣速達到最大，沿喉管周邊布置的噴嘴噴出的液滴被高速氣體霧化后加速，氣液充分混合；在擴散管中，氣流速度減小，而壓力回升，使塵粒凝聚速度加快，增加了對微細粉塵的捕集效果。篩孔板（泡沫板）除塵脫硫裝置：依靠供液管道將堿液噴淋到篩孔板上，形成一定厚度的原始液層，當氣體從板下進入時，在板上形成鼓泡層，使氣液強烈摻混，除去氣體中的粉塵和二氧化硫。鈉鈣雙堿法：利用鈉堿吸收二氧化硫、石灰處理和再生洗液，吸取堿法和石灰法的優(yōu)點避其不足而發(fā)展起來的。氧化鎂法：氧化鎂與二氧化硫反應得到亞硫酸鎂和硫酸鎂，通過煅燒可重新分解出氧化鎂，使吸收劑得到再生，同時回收較為純凈的二氧化硫氣體，脫硫劑可循環(huán)使用。按脫硫過程是否加水和脫硫產(chǎn)物的干濕形態(tài)，煙氣脫硫可分為：干法、半干法、濕法三類。地震、海嘯使人類更加清楚認識到生態(tài)環(huán)境的重要性。由酸雨引起各種破壞造成的經(jīng)濟損失每年達數(shù)百億元，已成為制約我國國民經(jīng)濟持續(xù)健康發(fā)展的重要因素之一。以燃煤為主的大氣污染導致酸雨的覆蓋面積約占國土面積的30%，呈明顯的區(qū)域特征。20世紀50年代以前，因燃煤、燃氣、燃油排放的二氧化硫和煙塵曾造成嚴重的大氣污染。 2煙氣脫硫現(xiàn)狀幾百年來，人類創(chuàng)造了歷史上最為輝煌燦爛的物質(zhì)文明和精神文明。（2）設計圖紙（包括雙堿法工藝流程圖、平面布置、脫硫除塵塔剖面圖等）。s only largescale mercial application of desulfurization countries in the world dedicated to research about more than 200 kinds of ways, but only 10 kinds of ways in industrial application. One more use of limestonegypsum method, dualalkali sodium alkali. However, due to limestone gypsum, sodium alkali high economic cost, dualalkali FGD process in the medium and small coalfired boiler applications are widely promoted.In this paper, chosen to 6t / h coalfired boiler flue gas desulfurization for the object design process, in the literature review and engineering design manual [1], as well as engineering practice parameters. Determined using dualalkali design process of calculation and selection of equipment.In the flue gas desulfurization system, the tower is the core devices, One cyclone tower is monly used in wet desulfurization equipment, which has a high load, low pressure drop, easy to plug and flexible width, etc., for fast absorption rate absorbent, and taking into account the status of implementation of the enterprise, decided to adopt the cyclone Plate as the desulfurization process of absorption equipment. Flue gas in order to countercurrent manner through the tower and increase the size of the contact area with the to reduce the required liquidgas ratio, the driving force for cost savings, but also a reduction of process water, reducing the preparation of gypsum system load。在煙氣脫硫系統(tǒng)中，吸收塔是核心裝置[2]，當前濕法脫硫的吸收設備種類很多，其中旋流塔板是濕法脫硫的常用設備，其具有高負荷、壓降低、不易堵塞及彈性寬等優(yōu)點[3]，適用于吸收速率快的吸收劑，且考慮到實施企業(yè)的現(xiàn)狀，決定采用旋流塔板作為脫硫工藝的吸收設備。溫江工業(yè)園區(qū)6t/h燃煤鍋爐脫硫除塵一體化工程設計摘 要控制燃煤的途徑有燃燒前脫硫，燃燒中脫硫，燃燒后煙氣脫硫。本論文選擇以6t/h燃煤鍋爐為對象設計煙氣脫硫除塵工藝，在查閱文獻和工程設計手冊以及工程實踐參數(shù)的基礎上，確定采用雙堿法，進行工藝的選擇和設計計算以及設備選型。關(guān)鍵詞： 燃煤鍋爐，煙氣脫硫，雙堿法，旋流板塔，設計 Flue gas Dedust and Desulfurization Design for 6t/h boiler in Wenjiang industrial park
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