沸石轉(zhuǎn)輪共分為三個(gè)區(qū)域：吸附區(qū)、脫附區(qū)及冷卻區(qū)。低濃度大風(fēng)量的廢氣通過(guò)沸石吸附區(qū)時(shí)，VOCs被吸附在蜂窩沸石中，被凈化后的氣體排出至煙囪；此時(shí),已吸附VOCs的蜂窩沸石旋轉(zhuǎn)至脫附區(qū)，利用高溫加熱氣流將吸附在蜂窩沸石中的VOCs吹出，然后將其送入后端的RTO系統(tǒng)進(jìn)行焚燒處理后排出至煙囪；最后，再將常溫廢氣通過(guò)冷卻區(qū)將剛被加熱的轉(zhuǎn)輪進(jìn)行冷卻。

The zeolite wheel is divided into three zones: adsorption zone, desorption zone, and cooling zone. When low concentration and high air volume exhaust gases pass through the zeolite adsorption zone, VOCs are adsorbed in the honeycomb zeolite, and the purified gas is discharged into the chimney; At this point, the honeycomb zeolite that has adsorbed VOCs rotates to the desorption zone, and the VOCs adsorbed in the honeycomb zeolite are blown out using high-temperature heating airflow. Then, they are sent to the RTO system at the rear for incineration treatment and discharged into the chimney; Finally, the ambient temperature exhaust gas is passed through the cooling zone to cool the newly heated rotor.

2、沸石轉(zhuǎn)輪的組成

2. Composition of Zeolite Wheel

2.1沸石分子篩：沸石分子篩是一種鋁硅酸金屬鹽的多微孔晶體，由硅氧四面體和鋁氧四面體通過(guò)共享氧原子相互連接形成骨架結(jié)構(gòu)，其表面為固體骨架，內(nèi)部為多微孔的篩狀構(gòu)造。內(nèi)部孔穴之間有孔道相互連接，其孔徑相同，分布非常均一，分子篩依據(jù)其內(nèi)部孔穴的大小，可對(duì)分子進(jìn)行選擇性吸附。沸石分子篩具有很大的比表面積(300～1000㎡/g)，內(nèi)部孔穴有強(qiáng)大的庫(kù)侖場(chǎng)和極性，因此，對(duì)吸附質(zhì)分子的吸附能力很強(qiáng)，遠(yuǎn)超過(guò)其他類型的吸附劑，即使在較高的溫度和較低的吸附質(zhì)分壓(或濃度)下，仍有很高的吸附容量，是一種高性能的分離吸附材料。

2.1 Zeolite Molecular Sieve: Zeolite molecular sieve is a microporous crystal of aluminum silicate metal salt, which is composed of silicon oxygen tetrahedra and aluminum oxygen tetrahedra connected by shared oxygen atoms to form a skeleton structure. Its surface is a solid skeleton, and its interior is a microporous sieve like structure. There are interconnected pores between the internal pores, with the same pore size and uniform distribution. Molecular sieves can selectively adsorb molecules based on the size of their internal pores. Zeolite molecular sieve has a large specific surface area (300-1000 ㎡/g) and strong Coulomb field and polarity in its internal pores. Therefore, it has a strong adsorption capacity for adsorbate molecules, far exceeding other types of adsorbents. Even at higher temperatures and lower adsorbate partial pressures (or concentrations), it still has high adsorption capacity and is a high-performance separation adsorbent material.

2.2、轉(zhuǎn)輪：沸石轉(zhuǎn)輪濃縮系統(tǒng)的關(guān)鍵部件是吸附輪(轉(zhuǎn)輪),轉(zhuǎn)輪由疏水性沸石吸附介質(zhì)與陶瓷纖維加工成波紋狀膜片，再卷制形成蜂巢狀的圓筒形框架結(jié)構(gòu)，其中部安裝有旋轉(zhuǎn)軸承。轉(zhuǎn)輪的機(jī)械結(jié)構(gòu)上，裝有耐VOCs腐蝕、耐高溫的材料制成的氣體密封墊，將轉(zhuǎn)輪隔離成三個(gè)區(qū)域：吸附處理區(qū)、再生脫附區(qū)、冷卻區(qū)。

2.2. Wheel: The key component of the zeolite wheel concentration system is the adsorption wheel (wheel). The wheel is made of hydrophobic zeolite adsorption medium and ceramic fibers processed into a corrugated membrane, which is then rolled into a honeycomb shaped cylindrical frame structure, with a rotating bearing installed in the middle. On the mechanical structure of the impeller, a gas sealing gasket made of VOCs corrosion-resistant and high-temperature resistant materials is installed to isolate the impeller into three areas: adsorption treatment area, regeneration desorption area, and cooling area.

2.3、全套設(shè)備主要由以下部分組成：廢氣過(guò)濾器、沸石轉(zhuǎn)輪、排氣風(fēng)機(jī)、RTO焚燒系統(tǒng)、熱交換器、自動(dòng)控制系統(tǒng)。

2.3. The complete set of equipment mainly consists of the following parts: exhaust gas filter, zeolite wheel, exhaust fan, RTO incineration system, heat exchanger, and automatic control system.

3、沸石轉(zhuǎn)輪的運(yùn)行原理

3. The operating principle of zeolite wheel

過(guò)濾后的大流量的低濃度有機(jī)廢氣被送至轉(zhuǎn)輪吸附區(qū)，轉(zhuǎn)輪可根據(jù)廢氣處理量，以1～6轉(zhuǎn)/小時(shí)的速度持續(xù)緩慢旋轉(zhuǎn)。廢氣中含有的VOCs被截留吸附在轉(zhuǎn)輪上的沸石分子篩內(nèi)部，凈化后的潔凈空氣則直接排放至大氣。轉(zhuǎn)輪持續(xù)旋轉(zhuǎn)吸附VOCs，逐漸趨向吸附飽和，當(dāng)轉(zhuǎn)輪旋轉(zhuǎn)進(jìn)入至脫附區(qū)時(shí)，脫附風(fēng)機(jī)提供200℃左右的高溫?zé)峥諝猓瑢⑽皆谵D(zhuǎn)輪上的的VOCs脫附并帶走。脫附后的轉(zhuǎn)輪進(jìn)入冷卻區(qū)，經(jīng)冷卻空氣吹掃，恢復(fù)至常溫，沸石轉(zhuǎn)輪從而恢復(fù)吸附能力，再次旋轉(zhuǎn)至吸附區(qū)，重新開(kāi)始下一輪的工作。

The filtered high flow low concentration organic waste gas is sent to the rotary adsorption zone, and the rotary can rotate slowly at a speed of 1-6 revolutions per hour according to the amount of waste gas treatment. The VOCs contained in the exhaust gas are intercepted and adsorbed inside the zeolite molecular sieve on the impeller, and the purified clean air is directly discharged into the atmosphere. The rotating wheel continues to adsorb VOCs, gradually approaching adsorption saturation. When the rotating wheel enters the desorption zone, the desorption fan provides high-temperature hot air at around 200 ℃ to desorb and take away the VOCs adsorbed on the rotating wheel. After detachment, the zeolite wheel enters the cooling zone and is blown by cooling air to return to room temperature. The zeolite wheel then recovers its adsorption capacity and rotates again to the adsorption zone to start the next round of work.

轉(zhuǎn)輪吸附的VOCs經(jīng)脫附后，隨脫附熱空氣送往RTO進(jìn)行凈化處理。由于廢氣中的VOCs被濃縮了5～20倍，因此，需要最終處理的有機(jī)廢氣具備了濃度高、風(fēng)量小、溫度高的特點(diǎn)，這樣就可以根據(jù)風(fēng)量大小、氣體濃度大小來(lái)設(shè)計(jì)合理的濃縮比及相應(yīng)的轉(zhuǎn)輪、RTO 大小。RTO焚燒產(chǎn)生的一部分熱能可用于轉(zhuǎn)輪脫附空氣的加熱;末端排放的高溫?zé)煔饪蛇M(jìn)行余熱回收，進(jìn)一步做到節(jié)能、環(huán)保。

The VOCs adsorbed by the impeller are desorbed and sent to RTO for purification treatment along with the desorbed hot air. Due to the concentration of VOCs in the exhaust gas by 5-20 times, the organic exhaust gas that needs to be treated has the characteristics of high concentration, low air volume, and high temperature. Therefore, a reasonable concentration ratio and corresponding wheel and RTO size can be designed based on the air volume and gas concentration. Part of the thermal energy generated by RTO incineration can be used to heat the desorbed air from the rotor; The high-temperature flue gas emitted from the end can be used for waste heat recovery, further achieving energy conservation and environmental protection.

4、沸石轉(zhuǎn)輪設(shè)備的特點(diǎn)

4. Characteristics of zeolite rotary equipment

1.吸附、脫附效率高。

1. High adsorption and desorption efficiency.

2.沸石轉(zhuǎn)輪吸附VOCs所產(chǎn)生的壓降極低，可大大減少電力能耗。

2. The pressure drop generated by zeolite rotary adsorption of VOCs is extremely low, which can greatly reduce electricity consumption.

3.使原本高風(fēng)量、低濃度的VOCs廢氣，轉(zhuǎn)換成低風(fēng)量、高濃度的廢氣，濃縮倍數(shù)達(dá)到5-30倍，大大縮小后處理設(shè)備的規(guī)格，運(yùn)行成本更低。

3. Convert the originally high air volume and low concentration VOCs waste gas into low air volume and high concentration waste gas, with a concentration factor of 5-30 times, greatly reducing the specifications of post-treatment equipment and lowering operating costs.

4.整體系統(tǒng)采用模組化設(shè)計(jì)，具備了最小的空間需求，且提供了持續(xù)性及無(wú)人化的操控模式。

4. The overall system adopts modular design, with minimal space requirements and providing continuous and unmanned control modes.

5.系統(tǒng)自動(dòng)化控制，單鍵啟動(dòng)，操作簡(jiǎn)單，并可搭配人機(jī)界面監(jiān)控重要操作數(shù)據(jù)。

5. System automation control, single key start, easy operation, and can be paired with a human-machine interface to monitor important operational data.

5、沸石轉(zhuǎn)輪處理物質(zhì)注意事項(xiàng)

5. Precautions for zeolite wheel processing materials

那吸附能力這么強(qiáng)的沸石轉(zhuǎn)輪，有沒(méi)有處理不了的廢氣呢？答案是肯定的。

Is there any exhaust gas that cannot be treated by the zeolite wheel with such strong adsorption capacity? The answer is affirmative.

對(duì)于沸石轉(zhuǎn)輪來(lái)說(shuō)，一些易聚合或者沸點(diǎn)高于260℃的大分子物質(zhì)是不允許進(jìn)入的。例如：酸性氣體和堿性氣體等會(huì)腐蝕轉(zhuǎn)輪；粉塵、漆霧、樹(shù)脂類、聚合物類等會(huì)堵塞轉(zhuǎn)輪；沸點(diǎn)大于220℃的三乙醇胺、苯甲醇等幾乎不能脫附；還有一些難吸附或者難脫附的氣體也基本上是不讓進(jìn)轉(zhuǎn)輪的。而對(duì)于有以上成分的VOCs，一般會(huì)在沸石轉(zhuǎn)輪前端增加前期處理裝置來(lái)進(jìn)行分離。

For zeolite rotors, some large molecular substances that are prone to polymerization or have a boiling point higher than 260 ℃ are not allowed to enter. For example, acidic gases and alkaline gases can corrode the impeller; Dust, paint mist, resin, polymer, etc. can clog the wheel; Triethanolamine and benzyl alcohol with boiling points greater than 220 ℃ are almost unable to desorb; Some gases that are difficult to adsorb or desorb are basically not allowed to enter the impeller. For VOCs with the above components, a pre-treatment device is generally added at the front end of the zeolite wheel for separation.

6、沸石轉(zhuǎn)輪的選擇

6. Selection of Zeolite Wheel

目前國(guó)內(nèi)的進(jìn)口傳統(tǒng)品牌有日本的霓佳斯、西部技研、東洋紡，瑞典的蒙特等，我國(guó)的自主品牌這幾年發(fā)展迅速，現(xiàn)有的沸石轉(zhuǎn)輪成型及設(shè)備技術(shù)水平與國(guó)外的差距也在逐步縮小，目前市場(chǎng)我們自主品牌的應(yīng)用也越來(lái)越多。那么我們?cè)谶x擇轉(zhuǎn)輪時(shí)需要注意哪些呢？

At present, traditional imported brands in China include Japan's Nijia Si, Western Technology Research Institute, Toyo Textile, Sweden's Monte, etc. China's independent brands have developed rapidly in recent years, and the gap between the existing zeolite wheel forming and equipment technology level and foreign countries is gradually narrowing. Currently, the application of our independent brands in the market is also increasing. So what should we pay attention to when choosing a wheel?

沸石含有率：顧名思義，對(duì)于沸石轉(zhuǎn)輪來(lái)說(shuō)，沸石的含有率越高其吸附效率也越大；

Zeolite content: As the name suggests, for zeolite rotors, the higher the zeolite content, the greater the adsorption efficiency;

疏水性：沸石原料中的Si/AL的比值越大，其疏水性越強(qiáng)；

Hydrophobicity: The higher the Si/AL ratio in zeolite raw materials, the stronger their hydrophobicity;

VOCs組成成分：轉(zhuǎn)輪供應(yīng)商會(huì)根據(jù)業(yè)主提供的VOCs組成成分進(jìn)行分析，從而選擇對(duì)應(yīng)的沸石和轉(zhuǎn)輪型號(hào)，因此在提供VOCs的成分時(shí)不能馬虎；

VOCs composition: The wheel supplier will analyze the VOCs composition provided by the owner and select the corresponding zeolite and wheel model, so the VOCs composition cannot be provided carelessly;

脫附效率：沸石轉(zhuǎn)輪的處理能力不能只看吸附效率，脫附效率也是至關(guān)重要的，當(dāng)脫附效率達(dá)不到要求時(shí)，久而久之會(huì)反過(guò)來(lái)影響沸石的吸附效率進(jìn)而影響沸石的使用壽命。

Desorption efficiency: The processing capacity of zeolite wheels cannot be solely judged by adsorption efficiency. Desorption efficiency is also crucial. When desorption efficiency does not meet the requirements, it will gradually affect the adsorption efficiency of zeolite and thus affect its service life.

沸石轉(zhuǎn)輪分為筒式轉(zhuǎn)輪和盤(pán)式轉(zhuǎn)輪，可以根據(jù)處理風(fēng)量、VOCS成分的不同選擇合適的轉(zhuǎn)輪。

Zeolite wheels are divided into cylindrical wheels and disc wheels, and suitable wheels can be selected according to the different processing air volume and VOCS composition.

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This article is a friendly contribution from RTO waste gas treatment equipment. For more related knowledge, please click: http://www.menggema.cn Sincere attitude. We provide you with comprehensive services. We will gradually contribute more relevant knowledge to everyone. Please stay tuned

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