在揮發(fā)性有機物（VOCs）排放控制領域，“沸石轉輪+蓄熱式熱氧化器（RTO）”組合工藝正成為石化、涂裝、印刷等行業(yè)的首選技術方案。該工藝通過吸附濃縮與高溫氧化的協(xié)同作用，實現(xiàn)廢氣中污染物的深度凈化，同時顯著降低能源消耗，推動工業(yè)綠色轉型。

　　In the field of volatile organic compounds (VOCs) emission control, the combination process of "zeolite wheel+regenerative thermal oxidizer (RTO)" is becoming the preferred technical solution for industries such as petrochemicals, coatings, and printing. This process achieves deep purification of pollutants in exhaust gas through the synergistic effect of adsorption concentration and high-temperature oxidation, while significantly reducing energy consumption and promoting industrial green transformation.

　　工藝原理與技術特性

　　Process principles and technical characteristics

　　沸石轉輪作為前端處理單元，其核心是疏水性蜂窩狀沸石分子篩。當含VOCs廢氣以低速通過轉輪吸附區(qū)時，沸石孔道內(nèi)的陽離子交換位點通過物理吸附作用捕獲有機物分子，凈化氣排放濃度可降至50mg/m3以下。轉輪持續(xù)旋轉至脫附區(qū)，被180-220℃的熱風解吸，濃縮比可達10-25倍。濃縮后的高濃度廢氣進入RTO爐膛，在750-850℃條件下發(fā)生氧化反應，生成CO?和H?O，熱回收效率超95%。

　　The zeolite wheel, as the front-end processing unit, has a hydrophobic honeycomb zeolite molecular sieve as its core. When VOCs containing exhaust gas passes through the rotary adsorption zone at low speed, the cation exchange sites in the zeolite pores capture organic molecules through physical adsorption, and the emission concentration of purified gas can be reduced to 50mg/m3 following. The wheel continues to rotate until it reaches the desorption zone, where it is desorbed by hot air at 180-220 ℃, with a concentration ratio of 10-25 times. The concentrated high concentration exhaust gas enters the RTO furnace and undergoes oxidation reaction at 750-850 ℃ to generate CO? And H? O, with a heat recovery efficiency of over 95%.

　　組合工藝的核心優(yōu)勢

　　The core advantages of combination technology

　　該工藝突破單一技術局限，形成“吸附-濃縮-氧化”的閉環(huán)系統(tǒng)。沸石轉輪解決RTO直接處理低濃度廢氣的能耗難題，RTO則消除沸石轉輪脫附氣二次污染風險。某汽車涂裝線應用數(shù)據(jù)顯示，組合工藝使天然氣消耗量下降，VOCs排放濃度穩(wěn)定低于30mg/m3，遠低于國家排放標準。在電子元件制造行業(yè)，該工藝成功處理含異丙醇、丙酮的復雜廢氣，非甲烷總烴去除率超99%。

　　This process breaks through the limitations of a single technology and forms a closed-loop system of "adsorption concentration oxidation". Zeolite wheel solves the energy consumption problem of direct treatment of low concentration exhaust gas by RTO, while RTO eliminates the risk of secondary pollution caused by desorption gas from zeolite wheel. The application data of a certain car painting line shows that the combination process reduces the consumption of natural gas and stabilizes the VOCs emission concentration below 30mg/m3 Far below the national emission standards. In the electronic component manufacturing industry, this process successfully treats complex exhaust gases containing isopropanol and acetone, with a non methane total hydrocarbon removal rate of over 99%.

　　節(jié)能降碳的經(jīng)濟價值

　　The economic value of energy conservation and carbon reduction

　　RTO配備的三床式蓄熱體采用陶瓷蜂窩材料，換熱面積達500m2/m3，熱回收率較傳統(tǒng)工藝提升。脫附熱風利用RTO余熱加熱，減少額外能源輸入。某包裝印刷企業(yè)實踐表明，組合工藝較傳統(tǒng)催化燃燒技術年節(jié)約標準煤，減排二氧化碳當量。對于間歇性排放工況，設備可接入智能控制系統(tǒng)，根據(jù)廢氣濃度自動調節(jié)運行參數(shù)，進一步降低空載能耗。

　　The three bed thermal storage body equipped with RTO adopts ceramic honeycomb material, with a heat exchange area of 500m2/m3 The heat recovery rate is improved compared to traditional processes. Desorption hot air utilizes RTO waste heat for heating, reducing additional energy input. The practice of a packaging printing enterprise has shown that the combination process saves standard coal and reduces carbon dioxide equivalent emissions compared to traditional catalytic combustion technology. For intermittent emission conditions, the equipment can be connected to an intelligent control system to automatically adjust operating parameters based on exhaust gas concentration, further reducing no-load energy consumption.

　　安全性能與穩(wěn)定運行

　　Safety performance and stable operation

　　針對沸石轉輪可能存在的脫附不完全風險，系統(tǒng)設置雙級冷凝裝置，將脫附氣溫度精準控制在安全范圍內(nèi)。RTO配備泄爆片、阻火器等多重安全裝置，爐膛內(nèi)設置高溫限值連鎖保護。在化工園區(qū)應用中，設備成功處理含氯苯、二甲苯的高危廢氣，未發(fā)生安全事故。對于含硅氧烷等易導致催化劑中毒的廢氣，轉輪吸附層可有效攔截，延長RTO維護周期。

　　In response to the potential risk of incomplete desorption of zeolite rotors, the system is equipped with a two-stage condensing device to accurately control the desorption gas temperature within a safe range. RTO is equipped with multiple safety devices such as explosion-proof discs and flame arresters, and high-temperature limit interlock protection is installed in the furnace. In the application of chemical industrial parks, the equipment successfully processed high-risk waste gases containing chlorobenzene and xylene without any safety accidents. For exhaust gases containing siloxanes that are prone to catalyst poisoning, the rotary adsorption layer can effectively intercept and extend the maintenance cycle of RTO.

　　智能監(jiān)測與數(shù)字賦能

　　Intelligent monitoring and digital empowerment

　　設備搭載物聯(lián)網(wǎng)監(jiān)測平臺，實時采集溫度、壓力、濃度等30余項參數(shù)。通過邊緣計算模塊，系統(tǒng)可預測沸石吸附飽和度，提前規(guī)劃再生周期。在京津冀某工業(yè)區(qū)，監(jiān)管部門通過數(shù)字孿生平臺遠程監(jiān)控12套組合裝置，實現(xiàn)排放數(shù)據(jù)分鐘級更新。

　　The device is equipped with an IoT monitoring platform, which collects more than 30 parameters such as temperature, pressure, and concentration in real time. Through the edge computing module, the system can predict the adsorption saturation of zeolite and plan the regeneration cycle in advance. In an industrial zone in the Beijing Tianjin Hebei region, regulatory authorities remotely monitor 12 sets of combined devices through a digital twin platform, achieving minute level updates of emission data.

　　隨著“雙碳”戰(zhàn)略推進，該組合工藝正朝向更高效、更智能方向發(fā)展。新型鈦硅分子篩轉輪可實現(xiàn)脫附溫度降低，進一步節(jié)能。RTO與熱泵技術耦合，可將余熱用于廠區(qū)供暖，系統(tǒng)綜合能效比提升。未來，數(shù)字孿生技術將構建虛擬工藝模型，通過模擬不同工況優(yōu)化運行參數(shù)，推動工業(yè)廢氣治理向近零排放目標邁進。

　　With the advancement of the "dual carbon" strategy, this combination process is developing towards greater efficiency and intelligence. The new titanium silicate molecular sieve wheel can achieve a reduction in desorption temperature, further saving energy. The coupling of RTO and heat pump technology can use waste heat for heating in the factory area, improving the overall energy efficiency ratio of the system. In the future, digital twin technology will construct virtual process models, optimize operating parameters by simulating different working conditions, and promote industrial waste gas treatment towards the goal of near zero emissions.

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