WOODWARD 5601-1126伺服放大器,5601-1126調速器
裂解反應主要過(guò)程是烴和蒸汽混合物在裂解爐中進(jìn)行高溫熱裂解，形成富含乙烯和其他烯烴氣體的混合物，同時(shí)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（用于裝置內的加氫反應）和甲烷（用作燃料氣）。裝置內部生產(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(guò)環(huán)境空氣提供。每個(gè)燒嘴配置1臺空氣預熱器，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，節省能耗。
乙烯裂解有3個(gè)關(guān)鍵變量，分別是停留時(shí)間、烴分壓、反應溫度，這些變量在工業(yè)裂解爐上對應4個(gè)主要操作參數：原料進(jìn)料流量、稀釋蒸汽流量、爐管出口壓力、爐管出口溫度（COT）。烴類(lèi)原料裂解生成乙烯和丙烯的反應平衡，主要取決于反應的溫度和時(shí)間，尤其取決于最高的反應溫度或COT。
丙乙烯轉化率是衡量裂解深度的主要指標，原料的產(chǎn)品分布與反應的劇烈程度有關(guān)。根據裂解原料的種類(lèi)選取某種關(guān)鍵組分,并用它的轉化率衡量整個(gè)原料的轉化率，裂解深度越高，乙烯收率會(huì )越高,而丙乙烯比則會(huì )降低，甲烷和氫氣的收率也會(huì )提高。WOODWARD 5601-1126伺服放大器
因此，可以通過(guò)調整裂解深度，在一定程度內可以調整各個(gè)主要裂解產(chǎn)品的收率分配比。另外，烴分壓也是影響反應平衡的重要因素，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(huì )減小特定原料的乙烯收率，產(chǎn)品的產(chǎn)率分布主要通過(guò)控制COT實(shí)現。
1、 COT穩定與支路平衡優(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
