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</h3> <div class="blank15"></div> <div class="content_about"> <div class="content_Title">關于煙氣脫硫技術應用和展望</div> <div class="blank15"></div> <p style="white-space: normal;">結合火電廠脫硫技術現狀，明晟環保為大家簡要介紹幾種火電廠燃煤煙氣脫硫技術的發展狀況及其各自的特點，并對脫硫技術的工藝選擇進行了總結，對發展前景進行了展望。</p><p style="white-space: normal;">1引言</p><p style="white-space: normal;">隨著社會和經濟的迅速發展，環境污染問題日益突顯，嚴重危害人們的身心健康,影響社會的可持續發展，逐漸成為威脅生存和發展的重大社會問題。目前，我國的空氣污染為嚴重，主要污染物為SO2和煙塵，SO2排放量約為百分之六十到七十，其中大部分來自于火電廠燃煤過程。因此，發展低成本、高效率的脫硫技術成為發電企業的重中之重。近年來，我國緊抓煙氣脫硫工作并取得了重大進展，先后引進了各種類型的煙氣脫硫技術，并已投入運行。</p><p style="white-space: normal;">2我國現有的脫硫技術</p><p style="white-space: normal;">2.1石灰石一石膏濕法脫硫技術</p><p style="white-space: normal;">基本原理為煙氣先是進入電除塵器除去粉塵，再進入換熱器冷卻，末了進入吸收塔，在向上流動的過程中SO2與吸收劑發生化學反應，生成CaSO3。潔凈煙氣在換熱器中加熱以后排放，CaSO3與氧氣發生反應生成石膏。</p><p style="white-space: normal;">此技術具有處理煙氣量大、脫硫效率高、脫硫所需原料分布廣泛、價格便宜、煤種適應性好且脫硫裝置的運行不影響鍋爐性能的優點。其缺點是易堵塞、結垢、腐蝕和機械故障等問題，而且能源消耗大，廢水難處理，投資運行費用高，碳排放高，二次污染嚴重。</p><p style="white-space: normal;">2.2.海水脫硫技術</p><p style="white-space: normal;">天然海水含有大量的堿性可溶性鹽，自然堿度通常為1.2～2.5mol/L，具有天然的酸堿緩沖能力和吸收SO2的能力。</p><p style="white-space: normal;">基本原理為冷卻后的煙氣進入吸收塔，與海水在塔板上逆向接觸去除SO2。清潔煙氣經除霧后排放，吸收了SO2的海水進入曝氣池進行曝氣處理，待水質充分恢復后返回大海。</p><p style="white-space: normal;">海水脫硫工藝適合于燃燒中低硫煤的沿海電廠，其工藝簡單，投資及運行費用低，不存在廢棄物處理問題，且脫硫效率高。</p><p style="white-space: normal;">2.3.梯級分離凈化氨法脫硫除塵一體化技術</p><p style="white-space: normal;">氨法脫硫是一種高效、低耗能的濕法脫硫方式，脫硫過程是氣液相反應，反應速率快，吸收劑利用率高，能保持脫硫效率95—99%。氨在水中的溶解度超過20%。氨法具有豐富的原料。氨法以氨為原料，其形式是氨水。目前我國火電廠年排放SO2約1000萬噸，即使全采用氨法脫硫，用氨量也不超過500萬噸/年，供應完全有保證。</p><p style="white-space: normal;">氨法脫硫具有以下優點： 1、運行成本低，變廢為寶。 2、多元有機肥可以起到改善土壤的作用，是環保產業的一大創舉。 3、社會價值高、經濟效益好、可資源化利用、利于循環經濟。</p><p style="white-space: normal;">3脫硫工藝的選擇原則</p><p style="white-space: normal;">控制火電廠SO2排放方法眾多，各種脫硫工藝工程投資及其脫硫效率各不相同，一般可根據以下幾個方面綜合考慮選擇何種工藝:</p><p style="white-space: normal;">(1)SO2排放濃度和排放量須滿足和當地政府的環保要求;</p><p style="white-space: normal;">(2)脫硫工藝要適用于工程已確定的煤種條件，并考慮燃煤硫分等在一定范圍內變動的可能性;</p><p style="white-space: normal;">(3)脫硫工藝要技術成熟、設備運行可靠,并有多成功的運行業績;</p><p style="white-space: normal;">(4)脫硫裝置應布置合理，特別是老機組增設脫硫裝置其占地面積應盡可能小;</p><p style="white-space: normal;">(5)吸收劑要有穩定可靠的來源且價格合理;</p><p style="white-space: normal;">(6)脫硫劑、水和能源等消耗少，盡量減少運行費用;</p><p style="white-space: normal;">(7)脫硫副產物、脫硫工藝產生的廢水應能合理地利用或處置，沒有二次污染。</p><p style="white-space: normal;">天藍環保憑借幾十年的化工經驗，以實體工業求發展，以低碳經濟、變廢為寶為理念，從根本上解決了高耗能和二次污染問題，使超低排放科技化、系統化。 </p><p style="white-space: normal;">天藍環保愿與社會各界聯合起來，共負社會和歷史的責任，推進人類文明的進步。</p><p></p> <div class="blank10"></div> 本文鏈接：<a href="/show-159.html" title="關于煙氣脫硫技術應用和展望">/show-159.html</a> <div class="blank15"></div> <div class="content_news_Title">相關文章</div> <div class="content_news"> <ul> <li><strong><span>[2022-05-21]</span></strong><a href="http://www.abidingrocky.com/show-159.html " title="關于煙氣脫硫技術應用和展望" target="_self">關于煙氣脫硫技術應用和展望</a></li> <li><strong><span>[2022-05-21]</span></strong><a href="http://www.abidingrocky.com/show-158.html " title=" 脫硫工藝流程圖，需要的拿走！" target="_self"> 脫硫工藝流程圖，需要的拿走！</a></li> 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