發(fā)布時(shí)間：2018-02-16 12:00

  本文關(guān)鍵詞： 濕法煙氣脫硫 傳統(tǒng)板式除霧器 靜電除霧器 旋風(fēng)除霧器 覆膜 涂層　出處：《華北電力大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：燃煤電廠(chǎng)濕法脫硫后的煙氣中含有大量酸霧、石膏粒子以及少量其他的重金屬微粒，如果不能有效去除，其將對(duì)后續(xù)設(shè)備造成腐蝕，對(duì)周?chē)�環(huán)境造成污染，對(duì)人體造成很大的危害，為了避免對(duì)濕法煙氣脫硫后續(xù)設(shè)備的腐蝕和環(huán)境的污染，火電廠(chǎng)在濕法脫硫塔中都安裝有脫硫除霧器。但是由于經(jīng)濟(jì)的快速發(fā)展，電力的消耗劇增，依靠燃煤為主的火力發(fā)電廠(chǎng)產(chǎn)生的污染也日益加重，而傳統(tǒng)脫硫除霧器發(fā)展緩慢，除霧效率有限，尤其對(duì)微米級(jí)及亞微米級(jí)粒子幾乎不能捕集的諸多弊端也日漸顯現(xiàn)。因此，對(duì)脫硫塔高效除霧技術(shù)研究顯得尤為重要。 本文首先通過(guò)查閱文獻(xiàn)資料綜合介紹了傳統(tǒng)板式除霧器除霧機(jī)理，結(jié)構(gòu)特點(diǎn)，性能參數(shù)，影響因素和常見(jiàn)問(wèn)題及原因，以及簡(jiǎn)要介紹了其他分離技術(shù)的原理，結(jié)構(gòu)特性及現(xiàn)狀。 其次，在傳統(tǒng)板式除霧器和其他分離技術(shù)的理論啟示的基礎(chǔ)上，結(jié)合氣液的分離理論及濕法脫硫煙氣的工況，提出了脫硫塔高效除霧技術(shù)并進(jìn)行了深入研究：①對(duì)傳統(tǒng)板式除霧器提出了改造內(nèi)容并進(jìn)行了模型構(gòu)建和計(jì)算；②對(duì)板式除霧器進(jìn)行了成垢機(jī)理、原因分析，，并提出了對(duì)板面覆膜或涂層防垢的思路；③受靜電除霧（塵）技術(shù)的啟發(fā)，提出靜電除霧技術(shù)應(yīng)用于濕法煙氣除霧中，并對(duì)本體結(jié)構(gòu)中重點(diǎn)影響高效的部分進(jìn)行分析研究；④未來(lái)濕法脫硫大氣量，高氣速背景下使得旋風(fēng)除霧技術(shù)有了廣闊的應(yīng)用空間，文章根據(jù)旋風(fēng)分離技術(shù)相關(guān)的理論基礎(chǔ)，對(duì)旋風(fēng)除霧器的的本體重點(diǎn)部分進(jìn)行了有關(guān)計(jì)算；⑤簡(jiǎn)要分析了濕式除塵和膜極板應(yīng)用于濕法脫硫后煙氣處理的優(yōu)越特性和應(yīng)用的可行性。 最后，本文對(duì)高效除霧器和傳統(tǒng)板式除霧器進(jìn)行了原理，除霧效率，結(jié)構(gòu)特點(diǎn)，環(huán)保及經(jīng)濟(jì)性方面的簡(jiǎn)要評(píng)價(jià)，并對(duì)脫硫塔除霧器的選擇給出了相關(guān)建議，并展望了高效除霧技術(shù)在燃煤電廠(chǎng)應(yīng)用中可為節(jié)能減排做出巨大貢獻(xiàn)。
[Abstract]:The flue gas of coal-fired power plant after wet desulfurization contains a large amount of acid fog, gypsum particles and a small amount of other heavy metal particles. If it cannot be removed effectively, it will cause corrosion to the follow-up equipment and pollute the surrounding environment. In order to avoid corrosion and environmental pollution of the follow-up equipment for wet flue gas desulfurization, thermal power plants have installed desulfurization and mist remover in the wet desulfurization tower. However, due to the rapid development of economy, the consumption of electric power has increased dramatically. The pollution produced by coal-fired thermal power plants is becoming more and more serious, while the traditional desulphurization defogger is developing slowly, and the efficiency of removing fog is limited, especially for micron and submicron particles which can hardly be captured. It is very important to study the high efficiency defogging technology of desulphurizer. In this paper, the mechanism, structure characteristics, performance parameters, influencing factors, common problems and causes of the traditional plate demister are introduced, and the principles of other separation techniques are briefly introduced. Structural characteristics and current situation. Secondly, on the basis of the theoretical enlightenment of the traditional plate demister and other separation technologies, combined with the gas-liquid separation theory and the working conditions of the wet desulfurization flue gas, The high efficiency defogging technology of desulphurizer is put forward and the retrofit content of traditional plate demister is put forward. The model construction and calculation are carried out, and the scaling mechanism of the plate type mist remover is calculated. The reasons are analyzed. The paper also puts forward the idea of anti-fouling on the plate surface, which is inspired by electrostatic fogging (dust) technology, and puts forward the application of electrostatic de-fogging technology in wet flue gas defog. This paper also analyzes and studies the important parts of the body structure that affect the high efficiency. In the future, the large amount of wet desulfurization in the future makes the cyclone defog technology have a broad application space under the background of high gas velocity. According to the theoretical basis of cyclone separation technology, Based on the calculation of the main parts of the cyclone precipitator, the advantages of wet dust removal and the application of membrane plate in flue gas treatment after wet desulphurization are briefly analyzed and the feasibility of the application is also discussed. Finally, this paper gives a brief evaluation of the high efficiency, structure, environmental protection and economy of the high efficiency demister and the traditional plate demister, and gives some suggestions on the choice of the demister for the desulfurization tower. The application of high efficiency defogging technology in coal-fired power plants is expected to make a great contribution to energy saving and emission reduction.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：X773

【參考文獻(xiàn)】

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