1廢氣成分

1. Composition of exhaust gas

沸石是一種混合物，其成分不同，能夠吸附的VOCs組分也有所差異。因此，在選擇轉輪時，需明確廢氣的主要成分、含量、濃度、風量等參數，以便選擇更加合適的沸石材料，達到處理VOCs的目的。

Zeolite is a mixture with different components, and the components of VOCs that can be adsorbed also vary. Therefore, when selecting the impeller, it is necessary to clarify the main components, content, concentration, air volume and other parameters of the exhaust gas in order to select more suitable zeolite materials and achieve the goal of treating VOCs.

廢氣成分比較單一或者成分特性比較接近時，選用一級轉輪就能夠達到目的。但是，如果廢氣成分比較復雜，一級轉輪不能一次性處理的話，可以考慮使用兩級轉輪來處理，兩級轉輪可針對不同組分進行處理，能有效提高處理效率。

When the composition of exhaust gas is relatively single or the composition characteristics are similar, selecting a first stage impeller can achieve the goal. However, if the composition of the exhaust gas is complex and the first stage impeller cannot be used for one-time treatment, it can be considered to use a two-stage impeller for treatment. The two-stage impeller can be used to treat different components, which can effectively improve treatment efficiency.

當廢氣中含有沸點高的VOCs時，如果脫附熱量不足，吸附劑沒有完全脫附，會使吸附劑在吸附區堆積。隨著時間的推移，會發生聚合反應，進而堵塞沸石的吸附位置，導致這一區域的吸附效率降低。

When the exhaust gas contains VOCs with high boiling points, if the desorption heat is insufficient and the adsorbent is not completely desorbed, it will cause the adsorbent to accumulate in the adsorption zone. Over time, polymerization reactions will occur, leading to blockage of the adsorption site of zeolite and a decrease in adsorption efficiency in this area.

為了使吸附在沸石中的高沸點VOCs完全脫附，避免造成高沸點VOCs的解吸困難，在進入吸附輪前要用濾布或活性炭對廢氣進行過濾，添加除霧器或冷凝器，先將高沸點VOCs去除。

In order to completely desorb high boiling VOCs adsorbed in zeolite and avoid difficulties in desorbing high boiling VOCs, filter the exhaust gas with filter cloth or activated carbon before entering the adsorption wheel, add a defogger or condenser, and first remove the high boiling VOCs.

2廢氣冷卻

2. Exhaust gas cooling

沸石的特性是在溫度較低時具有很強的吸附性能，溫度較高時呈現脫附性能。因此，為了使廢氣通過轉輪的沸石模塊時能被大量快速吸附，一般要求廢氣的溫度低于40℃，印刷等行業普遍能夠滿足這一要求。

The characteristic of zeolite is that it has strong adsorption performance at low temperatures and exhibits desorption performance at high temperatures. Therefore, in order to allow the exhaust gas to be quickly adsorbed in large quantities through the zeolite module of the impeller, it is generally required that the temperature of the exhaust gas be below 40 ℃, which is generally met by industries such as printing.

但是，個別企業的廢氣溫度較高，會導致沸石模塊的吸附處理效率不高。為了解決這一問題，需要在前段增加降溫措施。

However, some companies have high exhaust gas temperatures, which can lead to low adsorption efficiency of zeolite modules. To address this issue, it is necessary to add cooling measures in the early stages.

降溫裝置設有冷卻塔、表冷器、循環水泵、閥門組件、閥組過濾器、管路、儀器儀表及溫控系統。在廢氣溫度高于35℃時，系統自動啟動循環冷卻系統。

The cooling device is equipped with a cooling tower, surface cooler, circulating water pump, valve components, valve group filters, pipelines, instruments and temperature control system. When the exhaust gas temperature exceeds 35 ℃, the system automatically starts the circulating cooling system.

實際應用中會在過濾裝置后端增加循環冷卻水對廢氣進行間接式降溫，使進入沸石轉輪的廢氣溫度保持在35℃，沸石轉輪的吸附效率達到穩定。

In practical applications, circulating cooling water will be added at the back end of the filtration device to indirectly cool the exhaust gas, keeping the temperature of the exhaust gas entering the zeolite wheel at 35 ℃, and achieving stable adsorption efficiency of the zeolite wheel.

3廢氣的前處理

3. Pre treatment of exhaust gas

沸石轉輪的模塊被制成多層結構，具有一定尺寸的孔道，廢氣通過時進行吸附，如果孔道堵塞，則無法吸附。為了保護沸石轉輪的吸附性能，廢氣進入沸石轉輪之前需進行預處理，使進入轉輪濃縮系統的塵埃粒子得到有效去除。

The module of the zeolite wheel is made into a multi-layer structure (as shown in the figure below), with a certain size of pores. When the exhaust gas passes through, it is adsorbed. If the pores are blocked, it cannot be adsorbed. In order to protect the adsorption performance of the zeolite wheel, pre-treatment is required before the exhaust gas enters the zeolite wheel to effectively remove the dust particles entering the wheel concentration system.