【摘要】： 二氧化氯是一種日益受到人們的關注和親睞的綠色殺菌消毒劑,對各種細菌和病毒等具有廣譜、高效、安全的消毒殺滅特點和優(yōu)勢,被世界衛(wèi)生組織(WHO)確認為第四代Al型消毒劑。其應用于紙漿漂白、飲用水凈化和工業(yè)廢水處理等領域。在中國,有關化學法制備二氧化氯的研究較多,而電解法制備二氧化氯的研究則較少。因此,研究具有特色的先進二氧化氯生產工藝是目前非常急迫也非常有意義的一項工作。 本文首先通過電解氯酸鹽自動催化循環(huán)制備高純二氧化氯的實驗研究,討論了氯酸鹽濃度、硫酸的酸度、電解液溫度、電流密度以及電解液中二氧化氯剩余濃度對產品氣體中二氧化氯純度的影響。研究結果表明,實驗產生的產品氣體,二氧化氯的純度均在90%以上,當在最佳條件下,即氯酸鹽濃度約為1.0mol/L,硫酸的酸度約為4.90mol/L,電解液溫度約為28℃,電流密度約為975A/m2的條件下,產生二氧化氯的純度可達98%左右。同時對廢酸的循環(huán)利用以及二氧化氯的殺菌消毒進行了實驗,達到了很好的效果。 在實驗成功實現生產高純二氧化氯的基礎上,進一步對系統的各個參數進行了優(yōu)化設計計算,對陽極的硫酸溶液、陰極的氯酸鈉溶液的供給濃度和循環(huán)速率進行優(yōu)化控制,同時也對冷卻水的溫度和流速進行優(yōu)化控制。為了使過程更智能化,參數更精確化,設計了自動控制的部分來對進行各個參數進行精確控制。 根據實驗和計算得到的各個參數,設計了電解氯酸鹽制備高純二氧化氯的工藝,進而設計了生產二氧化氯的成套設備。
[Abstract]:Chlorine dioxide is a kind of green germicidal disinfectant, which is paid more and more attention by people. It has broad spectrum, high efficiency and safety disinfection characteristics and advantages to various bacteria and viruses. It was confirmed by the World Health Organization (WHO) as the fourth generation Al disinfectant. It is used in pulp bleaching, drinking water purification and industrial wastewater treatment. In China, there are more studies on the preparation of chlorine dioxide by chemical method, but less research on the preparation of chlorine dioxide by electrolysis. Therefore, it is very urgent and meaningful to study the characteristic advanced chlorine dioxide production process. In this paper, the concentration of chlorate, the acidity of sulfuric acid, the temperature of electrolyte were discussed. Effect of current density and residual concentration of chlorine dioxide in electrolyte on purity of chlorine dioxide in product gas. The results show that the purity of chlorine dioxide is above 90%. When the concentration of chlorate is about 1.0 mol / L, the acidity of sulfuric acid is about 4.90 mol / L, the temperature of electrolyte is about 28 鈩，

本文編號：2124058