發(fā)布時(shí)間：2018-05-02 05:26

  本文選題：氯堿 + 氯氣　； 參考：《北京化工大學(xué)》2015年碩士論文

【摘要】：氯堿廠電解裝置產(chǎn)生氯氣、氯化氫、鹽酸酸霧、硫酸酸霧、二氧化碳等大量廢氣,對(duì)這些廢氣的有效處理和回收是降低氯堿行業(yè)大氣污染排放的有效途徑。在本文,我們針對(duì)新疆中泰化學(xué)華泰公司氯堿廠電解裝置廢氣處理技術(shù)中存在的問(wèn)題,對(duì)離子膜電解工段和鹽酸合成工段中上述廢氣的回收工藝進(jìn)行了技術(shù)改造研究。(1)在廢氯氣回收工藝中,進(jìn)行了CPVC取代UPVC管線、新增板式換熱器、增設(shè)堿液高位槽和變頻機(jī)泵等改造,改造后,裝置的穩(wěn)定性和適用性均得到大幅度提高。(2)在氯化氫尾氣回收工藝中,進(jìn)行了對(duì)氯化氫輸出管路增裝止回閥、將填料塔改為噴淋式吸收塔、在酸罐內(nèi)增加氮?dú)夤芫�等改造,解決了氯化氫互串、外溢、爆炸等問(wèn)題。(3)增裝了硫酸酸霧和鹽酸酸霧尾氣的吸收裝置,解決了酸霧排空造成的污染和腐蝕問(wèn)題,提高了生產(chǎn)裝置的穩(wěn)定性和安全性。(4)增裝了用堿液吸收二氧化碳制碳酸鈉的裝置,實(shí)現(xiàn)了二氧化碳的資源化利用,降低了運(yùn)行成本,減少了溫室氣體二氧化碳的排放。通過(guò)上述工藝技術(shù)改造,實(shí)現(xiàn)了氯堿廠電解裝置廢氣的減排或再利用,排放值均符合國(guó)家大氣污染排放標(biāo)準(zhǔn)。
[Abstract]:Chlorine gas, hydrogen chloride, acid mist of hydrochloric acid, acid mist of sulphuric acid, carbon dioxide and so on are produced in the electrolysis unit of chlor-alkali plant. The effective treatment and recovery of these waste gas is an effective way to reduce the emission of atmospheric pollution in chlor-alkali industry. In this paper, we aim at the problems existing in the waste gas treatment technology of chlor-alkali plant in Sino- Thai Chemical Huatai Company. The process of recovering the waste gas from the electrolytic section of ionic membrane and the synthetic section of hydrochloric acid has been studied. The waste gas recovery process has been replaced by CPVC instead of UPVC pipeline, and the plate heat exchanger has been added. The stability and applicability of the unit are greatly improved after the revamping of the high lye tank and the inverter pump.) in the hydrogen chloride tail gas recovery process, additional check valves have been installed on the hydrogen chloride output line. By changing the packed column into a spray absorption tower and adding nitrogen pipeline in the acid tank, the problems of hydrogen chloride crossover, spillover and explosion are solved by adding an absorber for the tail gas of sulfuric acid mist and hydrochloric acid mist. The problem of pollution and corrosion caused by acid mist emptying is solved, and the stability and safety of the production unit are improved. The equipment of absorbing carbon dioxide to sodium carbonate with alkali solution is added, which realizes the utilization of carbon dioxide and reduces the operation cost. Reduced greenhouse gas carbon dioxide emissions. The emission reduction and reuse of waste gas from electrolysis unit in chlor-alkali plant are realized through the above technological transformation, and the emission values are in line with the national air pollution emission standard.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X781.2

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本文編號(hào)：1832538