近期，《工業(yè)有機廢氣收集系統(tǒng)技術規(guī)范》（T/ACEF 207-2025）團體標準正式發(fā)布。

　　Recently, the group standard "Technical Specification for Industrial Organic Waste Gas Collection System" (T/ACEF 207-2025) has been officially released.

　　值得學習的是，標準中詳細介紹了廢氣收集裝置主要類型及關鍵技術要求，如下所示：

　　It is worth learning that the standard provides a detailed introduction to the main types and key technical requirements of exhaust gas collection devices, as follows:

　　1、密閉罩密閉排風罩（密閉罩）包括局部密閉罩、整體密閉罩、大容積密閉罩。將工藝設備散發(fā)有機廢氣的部分加以密閉的排風罩叫做局部密閉罩；將散發(fā)有機廢氣的設備大部分或全部密閉的排風罩叫做整體密閉罩；在較大范圍內(nèi)將散發(fā)有機廢氣的生產(chǎn)設備或有關工藝過程全部密閉的排風罩叫做大容積密閉罩。如圖A.1。?

　　1. A sealed exhaust hood (sealed hood) includes partial sealed hood, integral sealed hood, and large capacity sealed hood. The part of the process equipment that emits organic waste gas is called a partially sealed exhaust hood; The exhaust hood that seals most or all of the equipment that emits organic waste gas is called a fully enclosed hood; The exhaust hood that seals all production equipment or related processes that emit organic waste gas on a large scale is called a large capacity sealed hood. As shown in Figure A.1.?

　　針對有機廢氣散發(fā)面較小的設備或工段，可選用局部密閉罩，如橡膠硫化車間的硫化設備；針對散發(fā)面較大的設備或工段，可選用整體密閉罩密閉收集，如噴漆車間、涂布車間的噴漆工段、烘干工段；針對多臺設備、多個工段散發(fā)有機廢氣的設備或工段，可選用大容積密閉罩，如印刷車間。

　　For equipment or sections with small emission areas of organic waste gas, local sealed covers can be used, such as the vulcanization equipment in the rubber vulcanization workshop; For equipment or work sections with large emission surfaces, a fully enclosed hood can be used for closed collection, such as the painting workshop, coating workshop's painting section, and drying section; For equipment or sections that emit organic waste gas from multiple devices or sections, a large capacity sealed hood can be used, such as in a printing workshop.

　　密閉罩排風口布置方式有多種：a）直接設置在罩體上，如圖A.2a）；b）接管靠近散發(fā)點位，如圖A.2b），當排風口靠近有機廢氣散發(fā)點位時，風速不應太高，防止吸走工藝物料；c）罩內(nèi)有多個有機廢氣散發(fā)點位時，設置多個排風口，如圖A.2c），既可就近收集有機廢氣，也可根據(jù)工藝進行啟閉控制，減少無效排風量；d）將排風口設置為排風罩，如圖A.2d），排風罩可選用小型密閉罩、半密閉罩、外部排風罩等，可進一步提高收集效率，降低排風量。

　　There are various ways to arrange the exhaust outlet of a closed hood: a) directly set on the hood body, as shown in Figure A.2a); b) Take over the area near the emission point, as shown in Figure A.2b). When the exhaust outlet is close to the organic waste gas emission point, the wind speed should not be too high to prevent the suction of process materials; c) When there are multiple organic waste gas emission points inside the hood, multiple exhaust outlets should be set up, as shown in Figure A.2c), which can collect organic waste gas nearby or control the opening and closing according to the process to reduce ineffective exhaust volume; d) Set the exhaust outlet as an exhaust hood, as shown in Figure A.2d). Small enclosed hoods, semi enclosed hoods, external exhaust hoods, etc. can be used as exhaust hoods to further improve collection efficiency and reduce exhaust volume.

　　2、半密閉罩

　　2. Semi closed cover

　　半密閉罩的結構與密閉排風罩類似，但由于工藝操作需要，罩的一面可全部或部分打開。半密閉罩因有多面圍擋，外部氣流干擾小，和外部排風罩相比能取得較好地控制有機廢氣的作用，同時便于工作人員的操作。工業(yè)有機廢氣半密閉罩多采用三面包圍式收集，如圖A.3。

　　The structure of a semi closed hood is similar to that of a closed exhaust hood, but due to process operation requirements, one side of the hood can be fully or partially opened. The semi enclosed hood has multiple enclosures and minimal external airflow interference. Compared with the external exhaust hood, it can achieve better control of organic waste gas and is easy for workers to operate. Industrial organic waste gas semi enclosed hoods often adopt a three sided enclosure collection method, as shown in Figure A.3.

　　3、外部排風罩

　　3. External exhaust hood

　　外部排風罩包括上吸罩（頂吸罩）、側吸罩、下吸罩（底吸罩）。設置在有機廢氣散發(fā)源上部的外部罩叫做上吸罩（頂吸罩）；設置在有機廢氣散發(fā)源側面的外部罩叫做側吸罩；設置在有機廢氣散發(fā)源下部的外部罩叫做下吸罩（底吸罩）。如圖A.4。

　　The external exhaust hood includes an upper suction hood (top suction hood), a side suction hood, and a lower suction hood (bottom suction hood). The external cover set on the upper part of the organic waste gas dispersion source is called the top suction cover; The external cover set on the side of the organic waste gas dispersion source is called a side suction cover; The external cover set at the lower part of the organic waste gas dispersion source is called a bottom suction cover. As shown in Figure A.4.

　　4、收集裝置設計

　　4. Collection device design

　　密閉罩、半密閉罩及外部排風罩的設計可參考GB/T 16758中的相關規(guī)定。

　　The design of enclosed hoods, semi enclosed hoods, and external exhaust hoods can refer to the relevant provisions in GB/T 16758.

　　5、循環(huán)通風收集

　　5. Circulating ventilation collection

　　循環(huán)通風收集技術主要有兩大應用場景。?a）如圖A.5a）所示的噴漆車間，為保證漆霧被有效收集，需要營造從上到下的垂直氣流，即需要較大的送風量，較大的送風量則需更大的排風量才能保證漆霧不溢出。為減少廢氣處理風量，即采用循環(huán)通風方式，將漆霧收集裝置內(nèi)排風中的大部分循環(huán)送回。b）如圖A.5b）所示的橡膠煉膠生產(chǎn)線，其產(chǎn)生一定的粉塵，需采用較大的排風量才能將粉塵有效輸送，但是煉膠過程VOCs散發(fā)量較小，排風濃度較低，因此選用循環(huán)通風方式，將粉塵收集過濾后將僅含VOCs的排風送回至收集裝置。循環(huán)通風的方式可大幅減少向室外排放的廢氣總量，提高有機廢氣收集濃度，同時也可節(jié)約空調(diào)供暖通風能耗（如汽車噴漆車間），是一種典型的節(jié)能增效方式。

　　There are two main application scenarios for circulating ventilation collection technology.? a) In the paint spraying workshop shown in Figure A.5a), in order to ensure effective collection of paint mist, it is necessary to create a vertical airflow from top to bottom, which requires a larger air supply volume. A larger air supply volume requires a larger exhaust volume to ensure that the paint mist does not overflow. To reduce the air volume of exhaust gas treatment, a circulating ventilation method is adopted to circulate most of the exhaust air in the paint mist collection device back. b) The rubber mixing production line shown in Figure A.5b) generates a certain amount of dust, which requires a large exhaust volume to effectively transport the dust. However, the VOCs emissions during the rubber mixing process are small, and the exhaust concentration is low. Therefore, a circulating ventilation method is selected to collect and filter the dust, and the exhaust containing only VOCs is sent back to the collection device. The method of circulating ventilation can significantly reduce the total amount of exhaust gas emitted to the outside, increase the concentration of organic waste gas collection, and also save energy consumption for air conditioning, heating, and ventilation (such as in car painting workshops). It is a typical energy-saving and efficiency enhancing method.

　　6、收集裝置補風設計

　　6. Collection device ventilation design

　　為保證各個排風點位補風充足，宜設置均勻補風。

　　To ensure sufficient air supply at each exhaust point, it is advisable to set up uniform air supply.

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