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　　在現代制藥工業的生產過程中，不可避免地要使用大量的化學與生物制劑，這帶來的一個結果是在生產的每個步驟都會排放出成分復雜的尾氣，以揮發性有機化合物(VOC)居多。如何處理含VOC的尾氣，成為企業面臨的一大環保難題。國內目前主要采用熱氧化法的處理方式，即蓄熱式熱力焚化爐(英文名為“Regenerative Thermal Oxidizer”，簡稱為“RTO”)
　　二、RTO工作原理
　　把有機廢氣加熱到760攝氏度以上，使廢氣中的VOC在氧化分解成二氧化碳和水。廢氣首先通過蓄熱體加熱到接近熱氧化溫度，而后進入燃燒室進行熱氧化，氧化后的氣體溫度升高，有機物基本上轉化成二氧化碳和水。凈化后的氣體，經過另一蓄熱體，溫度下降，達到排放標準后排放。不同蓄熱體之間通過切換閥，隨時間進行轉換，分別進行吸熱和放熱。氧化產生的高溫氣體流經特制的陶瓷蓄熱體，使陶瓷體升溫而“蓄熱”，此“蓄熱”用于預熱后續進入的有機廢氣，從而節省廢氣升溫的燃料消耗。陶瓷蓄熱體應分成兩個(含兩個)以上的區或室，每個蓄熱室依次經歷蓄熱-放熱-清掃等程序，周而復始，連續工作。蓄熱室“放熱”后應立即通過反吹風機對該蓄熱室進行清掃(以保證VOC去除率在95%以上)，只有待清掃完成后才能進入“蓄熱”程序。RTO設備的工作流程見下圖：
　三、控制要求和方法
　　3.1. 燃燒器控制
　　氧化室安裝一個帶比例調節的天然氣燃燒器。燃燒器的供熱量是用氧化室溫度，經過PID調節器自動調節，當燃燒器運行時，燃燒器PID的SP外給定值(TE05_AM)等于SP外給定值+升溫速率設定值/120。按照升溫曲線進行升溫。否則，SP外給定值等于氧化室溫度。如果SP外給定值超過TE05_S10(氧化室溫度--理想控制溫度設定)，那么TE05_S10直接賦值給TE05_AM(SP外給定值)，進行溫度限制。此外，燃燒系統還帶有熄火保護、超溫報警和超溫自動停燃燒器等功能。
3.2.進氣、出氣、清掃流程的切換
　　該設備有三個蓄熱室，一個公共氧化室，有機廢氣通過鼓風機送入蓄熱室1，吸熱后進入氧化室，蓄熱室1因放熱而降溫，燃燒升溫后的氣體進入蓄熱室2，通過熱交換把熱量蓄存在蓄熱室2的陶瓷蓄熱體中，處理后的氣體經后續處理合格后煙囪排空。同時蓄熱室3空間中殘留未處理的VOC廢氣被反吹風機吹回氧化室焚化處理。經過一段時間(約2分鐘(可設定))后，氣流改變方向從蓄熱室2進入氧化室，通過蓄熱室2吸收熱量升溫后，在氧化室內高溫焚化，最后經蓄熱室3熱交換后排放，同時蓄熱室1處于清掃狀態，經過一段時間(約2分鐘(可設定))后，氣流再次改變方向，不斷的交替循環，保證氧化室溫度在800℃以上，以此保證高的去除率和換熱效率。程序如下圖：

SIEMENS 6SE6410-2UB12-5AA0 6SE64102UB125AA0

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WE SHIP SAME CISCO WS-C3560X-24T-S CATALYST 3560X-24T SWICTH 1 YEAR

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3M 995 USPP 995

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Advantech PCA-6186VE PCA-6186 Rev.A1 NIB

Allen-Bradley 1771-OA AC OUTPUT MODULE

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ADEPT 90400-60131 AMPLIFIER MODULE MEGATORQUE 300 WATT CONTROLLER

6SE7026-0TP50 SIEMENS COMPACT + MASTERDRIVE 59AMP 30kW 510-620VDC MOTION CNTRL

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CUTLER HAMMER IDT0286 NSFP IDT0286

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