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class="content-h1-color">煙氣脫硫脫銷工程是重要的大氣環(huán)境治理方式</h1> <em class="custom-line"></em> </div> <div id="ypdzfxbdjnl" class="post-news-post-content"> <div>煙氣<a href="http://m.48455.cn/Products/"><strong>脫硫脫硝</strong></a>技術(shù)是應(yīng)用于多氮氧化物、硫氧化物生成化工工業(yè)的一項鍋爐煙氣凈化技術(shù)。氮氧化物、硫氧化物是空氣污染的主要來源之一。脫硫脫硝技術(shù)是防治大氣污染的重要技術(shù)措施之一。煙氣脫硫脫硝技術(shù)是應(yīng)用于多氮氧化物、硫氧化物生成化工工業(yè)的一項鍋爐煙氣凈化技術(shù)。</div><div><br /></div><div>脫硫：泛指燃燒前脫去燃料中的硫分以及煙道氣排放前的去硫過程。脫硫方法一般有燃燒前、燃燒中和燃燒后脫硫等三種。不少煙氣脫硫工藝已經(jīng)在工業(yè)中廣泛應(yīng)用，其對各類鍋爐和焚燒爐尾氣的治理也具有重要的意義。</div><div><br /></div><div>脫硝：為防止鍋爐內(nèi)煤燃燒后產(chǎn)生過多的NOx污染環(huán)境，應(yīng)對煤進行脫硝處理。分為燃燒前脫硝、燃燒過程脫硝、燃燒后脫硝。</div><div><br /></div><div style="text-align: center;"><img src="/up_files/month_2212/202212061530278055.jpg" alt="" /></div><div><h2>濕法煙氣脫硫脫銷技術(shù)概述</h2><div>特點：濕法煙氣脫硫技術(shù)為氣液反應(yīng)，反應(yīng)速度快，脫硫效率高，一般均高于90%，技術(shù)成熟，適用面廣。濕法脫硫技術(shù)較成熟，生產(chǎn)運行安全可靠，在眾多的脫硫技術(shù)中，占脫硫總裝機容量的80%以上。</div><div><br /></div><div>缺點：生成物是液體或淤渣，較難處理，設(shè)備腐蝕性嚴重，洗滌后煙氣需再熱，能耗高，占地面積大，投資和運行費用高。系統(tǒng)復雜、設(shè)備龐大、耗水量大、一次性投資高，一般適用于大型電廠。</div><h2>煙氣脫硫脫銷的分類</h2><div>常用的濕法<a href="http://m.48455.cn/tuoliutuoxiao/78.htm"><strong>煙氣脫硫脫銷</strong></a>技術(shù)有石灰石-石膏法、間接的石灰石-石膏法、檸檬吸收法等。</div><div><br /></div><div><strong>A、石灰石/石灰-石膏法</strong></div><div><br /></div><div>原理：是利用石灰石或石灰漿液吸收煙氣中的SO2，生成亞硫酸鈣，經(jīng)分離的亞硫酸鈣(CaSO3)可以拋棄，也可以氧化為硫酸鈣(CaSO4)，以石膏形式回收。是目前技術(shù)成熟、運行狀況穩(wěn)定的脫硫工藝。</div><div><br /></div><div>目前傳統(tǒng)的石灰石/石灰—石膏法煙氣脫硫工藝的應(yīng)用比較廣泛，其采用鈣基脫硫劑吸收二氧化硫后生成的亞硫酸鈣、硫酸鈣，由于其溶解度較小，極易在脫硫塔內(nèi)及管道內(nèi)形成結(jié)垢、堵塞現(xiàn)象。對比石灰石法脫硫技術(shù)，雙堿法煙氣脫硫技術(shù)則克服了石灰石—石灰法容易結(jié)垢的缺點。</div><div><br /></div><div><strong>B、間接石灰石-石膏法</strong></div><div><br /></div><div>常見的間接石灰石-石膏法有：鈉堿雙堿法、堿性硫酸鋁法和稀硫酸吸收法等。原理：鈉堿、堿性氧化鋁(Al2O3·nH2O)或稀硫酸(H2SO4)吸收SO2，生成的吸收液與石灰石反應(yīng)而得以再生，并生成石膏。該法操作簡單，二次污染少，無結(jié)垢和堵塞問題，脫硫效率高，但是生成的石膏產(chǎn)品質(zhì)量較差。</div><div><strong><br /></strong></div><div><strong>C、檸檬吸收法</strong></div><div><br /></div><div>原理：檸檬酸(H3C6H5O7·H2O)溶液具有較好的緩沖性能，當SO2氣體通過檸檬酸鹽液體時，煙氣中的SO2與水中H發(fā)生反應(yīng)生成H2SO3絡(luò)合物,SO2吸收率在99%以上。這種方法僅適于低濃度SO2煙氣，而不適于高濃度SO2氣體吸收，應(yīng)用范圍比較窄。另外，還有海水脫硫法、磷銨復肥法、液相催化法等濕法煙氣脫硫技術(shù)。</div></div> <div id="ypdzfxbdjnl" class="post-navigation content-h1-color"> <div id="ypdzfxbdjnl" class="lastpage">上一頁：<span id="k_lastpage"><a href="/chunguang/chunguangdongtai/147.htm">什么是化肥自動包裝機，怎樣維護保養(yǎng)</a></span></div> <div id="ypdzfxbdjnl" class="nextpage">下一頁：<span id="k_nextpage"><a href="/chunguang/chunguangdongtai/149.htm">低壓成套開關(guān)設(shè)備的日常檢測維護要點</a></span></div> </div> </div> <div id="ypdzfxbdjnl" class="related-post"> <div id="ypdzfxbdjnl" class="related-post-heading-section text-align-center"> <h2>相關(guān)產(chǎn)品</h2> <em class="custom-line"></em> </div> <div id="ypdzfxbdjnl" class="related-post-content"> </div> </div> </div> </div> </div> </div> </div> <style type="text/css"> .footer-link{padding:30px 0;} .footer-link-title{font: 300 15px/24px 'microsoft yahei', 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