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　　在現(xiàn)代制藥工業(yè)的生產(chǎn)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(jié)果是在生產(chǎn)的每個步驟都會排放出成分復(fù)雜的尾氣，以揮發(fā)性有機化合物(VOC)居多。如何處理含VOC的尾氣，成為企業(yè)面臨的一大環(huán)保難題。國內(nèi)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(zhuǎn)化成二氧化碳和水。凈化后的氣體，經(jīng)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(zhuǎn)換，分別進行吸熱和放熱。氧化產(chǎn)生的高溫氣體流經(jīng)特制的陶瓷蓄熱體，使陶瓷體升溫而“蓄熱”，此“蓄熱”用于預(yù)熱后續(xù)進入的有機廢氣，從而節(jié)省廢氣升溫的燃料消耗。陶瓷蓄熱體應(yīng)分成兩個(含兩個)以上的區(qū)或室，每個蓄熱室依次經(jīng)歷蓄熱-放熱-清掃等程序，周而復(fù)始，連續(xù)工作。蓄熱室“放熱”后應(yīng)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(shè)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(diào)節(jié)的天然氣燃燒器。燃燒器的供熱量是用氧化室溫度，經(jīng)過PID調(diào)節(jié)器自動調(diào)節(jié)，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(shè)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(shè)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(tǒng)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(shè)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(jīng)后續(xù)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(jīng)過一段時間(約2分鐘(可設(shè)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(nèi)高溫焚化，最后經(jīng)蓄熱室3熱交換后排放，同時蓄熱室1處于清掃狀態(tài)，經(jīng)過一段時間(約2分鐘(可設(shè)定))后，氣流再次改變方向，不斷的交替循環(huán)，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：

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Schneider Modicon ELECTRIC AS-BDAP-210

Schneider Modicon AS-W804-002 ASW804002 Aux Power Cable

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Allen Bradley SLC 500 Output Module 1746-OX8 Ser. A

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0.1-1250 μm LPA-9Z Desktop Inbligent Laser Particle Size Analyzer Sizer

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Schneider Digital Input Block Fuse 140CFB03200 3436

Square D 9006-PBF121

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WE SHIP SAME CISCO SLM2024T SG200-26 SLM2024T-NA 26PORT GIGABIT SMART

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SCHNEIDER TC2000 OPERATOR INTERFACE 3515 KPM PARTS/REPAIR BROKEN NOB

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RTI CM-232 Serial Communication Module

SIEMENS 6SN1162-0EB00-0AA0 SIMODRIVE SHIELD CONNECTION PLATE 50MM

SIEMENS 6SC 6101-4A Simodrive Case -NO BOX

SIEMENS 6FC5-111-0CA02-0AA2 USPP 6FC51110CA020AA2

AllenBradley6182H-10TLH4DVersaViewCE1000HWorkstationPanel

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ABB E3N-A20 600V 2000A PR112/P-A L/S/I/G INSULATED CASE CIRCUIT BREAKER

Adtech Spirent AX-4000 ATM Testing Solution AX4000

(H2-1) 1 EATON 92-00944-02 POWER SUPPLY H2-1

KENT TAYLOR 6202NZ10000B-1342 USPP 6202NZ10000B1342

ACUITY IMAGING 010-PV9040 USPP 010PV9040

FLUID POWER DIVISION PMC-20T NSFP PMC20T

FANUC A06B-0146-B675 USPP A06B0146B675

SENCON SC7000PLUS NSFP SC7000PLUS

RAYTHEON B34201-00-03-0 USPP B3420100030

REXROTH 3-842-999-903 NSPP 3842999903

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Square D 8005 NLU-10

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WS-F6K-DFC3A DIST FWD CARD-3A FOR 65XX 6816 MODULES WITH SUP720

SIEMENS 6ES7151-1AA03-0AB0

Siemens SCD 1597-ET1 6AV8100-1BB00-0AA1

Reliance 45C966

Schneider Modicon GOULD B805 AS-B805-016 INPUT MODULE 115 V AC

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Potter and Brumfield CB-1001B-70

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Schneider Modicon AC POWER CONVERTER AS-P120-000 LOT OF 2

Schneider Modicon /Modicon/AS-BDEP-210 Discrete Input NIB

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