目前,針對包裝印刷行業(yè)生產(chǎn)過程中存在的VOCs排放造成污染的問題,一些國家制定了“勞動衛(wèi)生法”、“有機溶劑排放法”等一系列法規(guī)。在我國的工作場所有害因素職業(yè)接觸限值和排放標準中,對VOCs的排放做出了嚴格規(guī)定:對包裝印刷廠生產(chǎn)車間排出的VOCs廢氣必須采取有效的收集方法和凈化工藝進行處理。
上海安居樂環(huán)?萍加邢薰疽恢弊咴趶U氣處理行業(yè)前端,主要致力于更節(jié)能、更高效、更適用的環(huán)保產(chǎn)品,經(jīng)過幾年共同研發(fā),不斷完善,開發(fā)出了一系列擁有完全自主知識產(chǎn)權的高科技新型實用、高效節(jié)能的環(huán)保產(chǎn)品。
目前關于印刷廢氣處理環(huán)保設備工藝常用成熟的工藝是轉輪+RTO工藝;
蓄熱式熱力焚燒(RTO)技術是一種工藝簡單、占地面積小、運行費用低的有機廢氣處理系統(tǒng),主要采用了先進的熱交換技術和新型蜂窩陶瓷蓄熱材料,高效先進的換熱系統(tǒng)保證了燃燒熱量的有效回收。
VOCs廢氣通過疏水性沸石濃縮轉輪后,能有效被吸附于沸石中,達到去除的目的。經(jīng)過沸石吸附的揮發(fā)性有機物的潔凈氣體,直接通過煙囪排放到大氣中,轉輪持續(xù)以每小時1-6轉的速度旋轉,同時將吸附的揮發(fā)性有機物傳送至脫附區(qū)。于脫附區(qū)中利用一小股加熱氣體將揮發(fā)性有機物進行脫附,脫附后的沸石轉輪旋轉至吸附區(qū),持續(xù)吸附揮發(fā)性有機氣體。脫附后的濃縮有機廢氣送至焚化爐進行燃燒轉化成二氧化碳及水蒸氣排放至大氣中。
將有機廢氣加熱升溫至760~820℃左右,使廢氣中的VOC氧化分解,成為無害的CO2和H2O;氧化時的高溫氣體的熱量被蓄熱體“貯存”起來,用于預熱新進入的有機廢氣,從而節(jié)省升溫所需要的燃料消耗,降低運行成本。
GRTO 凈化有機廢氣工藝特點
安全性
充分考慮了消防、防爆等安全因素,運行穩(wěn)定,安全可靠。GRTO不僅有高濃度防爆裝置,而且設有爆炸泄壓設計。
根據(jù)NFPA 規(guī)定設計,氧化爐本體需安裝四支熱電偶 用于溫度顯示,溫度記錄, 溫度控制, 連鎖系統(tǒng)運行, 報警以及控制主燃料比例閥閥之開度. 監(jiān)控爐膛溫度須達VOCs 分解溫度以及不能超過預警溫度。
技術先進性
GRTO 控制系統(tǒng)設有軟硬體聯(lián)鎖,可通過溫度、壓力等反饋,及時調節(jié)響應聯(lián)動器件,可有效保障系統(tǒng)安全。RTO控制系統(tǒng)采用 PLC,安置在控制盤體內;配有火焰強度顯示、高溫控制器、報警、復位、開關機、緊急停機以及無紙記錄儀;RTO系統(tǒng)與生成線進行無縫銜接,確保不影響現(xiàn)有工藝及生產(chǎn)。
工藝成熟性
該廢氣處理工藝成熟可靠,能保證處理效果、性能和處理能力,避免了資源浪費、二次污染和安全危害。并且多次應用在世界五百強涂裝、化工車間等
蓄熱式燃燒處理技術(RTO)是把廢氣加熱到700℃以上,使廢氣中的VOCs氧化分解成CO2和H2O,氧化產(chǎn)生的高溫氣體流經(jīng)陶瓷蓄熱體,使之升溫“蓄熱”,并用來預熱后續(xù)進入的有機廢氣,從而節(jié)省廢氣升溫燃料消耗的處理技術。與直燃法和催化氧化法相比,RTO能夠減少客戶的運行成本。
大風量、低濃度有機廢氣通入活性炭吸附床或分子篩轉輪被吸附凈化,并脫附再生后轉換成小風量、高濃度的有機廢氣被送往催化燃燒床進行氧化,在280℃以上時有機物被氧化分解成二氧化碳、水等無害氣體。燃燒后的熱廢氣通過熱交換器加熱冷空氣,熱交換后降溫的氣體部分排放,部分用于蜂窩狀活性炭的脫附再生,達到廢熱利用和節(jié)能的目的。
Zeolite Rotary Concentrator Wheel+ GRTO:
對于低濃度?大風量的VOC污染廢氣,上海安居樂環(huán)?萍脊煞萦邢薰就瞥鲎灾髦R產(chǎn)權的GRTO工藝,進一步完善了傳統(tǒng)的VOC濃縮+RTO蓄熱燃燒裝置工藝,可以將低濃度、大風量的污染空氣濃縮為小風量、高濃度的廢氣后進行熱力燃燒處理,效率提升,安全提升,而且可以降低運行成本,實現(xiàn)低成本、高效率VOC尾氣處理達標排放,是行業(yè)領先的有機揮發(fā)性VOC和惡臭HAP廢氣環(huán)保治理工藝。
How to treat low concentration with large air flow waste stream? Shanghai Anjule has patent designed solutions with the zeolite concentrators to reduce the air flow of the pollutant and concentrate the VOCs before the RTO treatment. Improve the removal efficiency, reduce the operating cost while meeting the regulations. This is a leading technologies in treating VOCs and HAP.
常規(guī)有機廢氣濃縮轉輪和RTO(RCO)處理流程如下:
The process flow for zeolite rotary concentrator wheel+ RTO (RCO)
安居樂的工藝技術更加貼近廢氣工況,以大風量的噴漆廢氣處理為例:
車間排放有機廢氣通過總管道送至G渦流凈化塔做漆霧顆粒去除處理,后經(jīng)過除霧器,再經(jīng)過專門設計的組合過濾器后,由VOC沸石濃縮轉輪吸附區(qū)吸附,吸附效率為90%以上;排放廢氣由吸附風機抽出,并達標排放;
濃縮轉輪吸附住的有機物,從轉輪脫附區(qū)域脫附出來進入RTO高溫氧化處理
Anjule technology can be applied to work with the process specifications. For example, emission from coating industrial has the characteristic of high air volume: the waste gas was sent to the G-vortex column to remove particulate. After the dehumidifier process, the waste gas was sent to a specially designed filter before entering the rotary concentrator for VOCs adsorption. The removal efficiency can achieve VOC removal efficiency above 90%. A system fan was installed to release the cleaned air, which is in compliance with the regulations. The air stream then transfer to the RTO for further treatment.
一、轉輪入口G渦流凈化塔
安居樂G渦流洗滌凈化塔采用獨特的渦流結構;凈化去除有機廢氣中漆物,以滿足轉輪入口條件;優(yōu)點:1、不易堵塞,無需更換填料。2、運行成本低。3、漆粒去除效率高,防治漆粒積蓄在轉輪上發(fā)生火災。
1. Rotary entrance with G-vortex column
Anjule G-vortex column has a unique vortex structure, purify and remove the paint organic substance from gas.
The advantage: 1. Avoid the blockage of the packing media; reduce the operating cost; and achieve high removal efficiency of VOC substance. Minimize the accumulation of the paint substance on the rotary and at a result prevent fire hazard.
二、先進轉輪裝置
2. Advance rotary device
安居樂設有專門的VOC處理實驗室,廢氣治理實驗工程中心,轉輪裝置引進日本,實驗測試具體成分的轉輪效率,保障項目的成功率。轉輪吸附裝置的優(yōu)點體積小、操作方便、壓降低;它可以連續(xù)地將大的廢氣流量處理成濃度足夠低的凈化氣,而解吸出來的氣體則濃度高而流量低,從而進入低風量RTO裝置徹底燃燒。
Aujule has set up a laboratory and an engineering center for the design of the exhaust gas VOC treatment. The rotary wheels are imported from Japan; the VOC compounds removal rate are measured in a laboratory to ensure the successful treatment for the environmental projects.
The advantage of our rotary concentrator: small size, convenience, low pressure lost and work continuously to concentrate low VOC concentration waste gas. The rotary processed gas has a high concentration of VOC with less volume and therefore reduce the amount of the waste gas for the RTO treatment.
三、安全性高
安居樂獨家專利設計的GRTO工藝充分考慮了消防、防爆等安全因素,運行穩(wěn)定,安全可靠,工藝完整。
3. Safety guarantee
Patent designed of Anjule GRTO has put the fire, explosions and other safety factors into fully consideration. The operation of the GRTO is steady, safe and reliable.
四、技術先進性
GRTO 控制系統(tǒng)設有軟硬體聯(lián)鎖,可通過溫度、壓力等反饋,及時調節(jié)響應聯(lián)動器件,可有效保障系統(tǒng)安全。RTO控制系統(tǒng)采用PLC,安置在控制盤體內;配有火焰強度顯示、高溫控制器、報警、復位、開關機、緊急停機以及記錄儀;RTO系統(tǒng)與產(chǎn)線進行無縫銜接,確保不影響現(xiàn)有工藝及生產(chǎn)。
4. Advance Technology
GRTO control system equipped with software and hardware interlocks, through temperature, pressure responses, the system reacts immediately to the safety control of the system. Effectively,protect the safety of the system . RTO control system uses PLC, installed inside of the control panels; equipped with flame intensity detector, temperature controllers, alarm, reset, on and off switch, emergency stop, and a recorder; RTO system works seamlessly with the production line without interfering to the existing production.
五、運行費用優(yōu)勢
濃度越高運行成本越低。所以采取合理的技術手段增加有機廢氣進入RTO(RCO)時的濃度,以及減少廢氣處理量是減少RTO(RCO)投資與提高運行效率的有效途徑。
5. The low operating cost advantage
Lower operating cost can be achieved with high VOC concentration in the waste stream. Using a rotary concentrator to reduce the volume of the waste gas is a feasible way in decreasing the cost.