WOODWARD 5601-1126伺服放大器,5601-1126調(diào)速器
裂解反應(yīng)主要過程是烴和蒸汽混合物在裂解爐中進行高溫?zé)崃呀?，形成富含乙烯和其他烯烴氣體的混合物，同時副產(chǎn)粗裂解汽油和燃料油。
其他副產(chǎn)品包括丙烯和混合C4、氫氣（用于裝置內(nèi)的加氫反應(yīng)）和甲烷（用作燃料氣）。裝置內(nèi)部生產(chǎn)的乙烷和丙烷，回到氣體原料裂解爐裂解再循環(huán)利用，以增加乙烯產(chǎn)率。WOODWARD 5601-1126伺服放大器
裂解反應(yīng)需要的熱量主要由裂解爐底部燒嘴燃燒產(chǎn)生的輻射熱提供，燃料主要有冷箱分離出的甲烷、氫氣、液化石油氣（LPG）和天然氣。燒嘴全部采用自然通風(fēng)的低氮氧化物型底部燒嘴，燃燒所需的氧氣通過環(huán)境空氣提供。每個燒嘴配置1臺空氣預(yù)熱器，用裝置多余的急冷水做熱源，加熱燃燒空氣，提高燃料的燃燒效率，節(jié)省能耗。
乙烯裂解有3個關(guān)鍵變量，分別是停留時間、烴分壓、反應(yīng)溫度，這些變量在工業(yè)裂解爐上對應(yīng)4個主要操作參數(shù)：原料進料流量、稀釋蒸汽流量、爐管出口壓力、爐管出口溫度（COT）。烴類原料裂解生成乙烯和丙烯的反應(yīng)平衡，主要取決于反應(yīng)的溫度和時間，尤其取決于最高的反應(yīng)溫度或COT。
丙乙烯轉(zhuǎn)化率是衡量裂解深度的主要指標(biāo)，原料的產(chǎn)品分布與反應(yīng)的劇烈程度有關(guān)。根據(jù)裂解原料的種類選取某種關(guān)鍵組分,并用它的轉(zhuǎn)化率衡量整個原料的轉(zhuǎn)化率，裂解深度越高，乙烯收率會越高,而丙乙烯比則會降低，甲烷和氫氣的收率也會提高。WOODWARD 5601-1126伺服放大器
因此，可以通過調(diào)整裂解深度，在一定程度內(nèi)可以調(diào)整各個主要裂解產(chǎn)品的收率分配比。另外，烴分壓也是影響反應(yīng)平衡的重要因素，分壓髙的烴組分不利于生成乙烯產(chǎn)品，降低蒸汽比例或增大爐管出口壓力會減小特定原料的乙烯收率，產(chǎn)品的產(chǎn)率分布主要通過控制COT實現(xiàn)。
1、 COT穩(wěn)定與支路平衡優(yōu)化控制power. It also makes it possible for manufacturers to choose the standard embedded system structure for design, get rid of the limitations brought by the proprietary hardware structure system of traditional PLC, and make the system have richer functional prospects. The so-called openness is to adopt international standards or recognized industrial standards in product design, component selection, network communication, operating system, monitoring and display. Thinking of standardization at all times can make the products of different manufacturers compatible, interchangeable and connected to the same network. Industrial Ethernet is such a standard. Since its appearance in 1975, the market share of Ethernet has been as high as 80%. There is no doubt that Ethernet is the leading network in the field of LAN (local area network). Ethernet can be divided into many levels. Generally, it is not necessary to use Ethernet for simple control
