天宏脈沖布袋除塵器是怎么來收集灰塵的

現在越來越多的廠家為了預防環境的污染，上了治理灰塵的除塵設備，那么大家知道布袋除塵器是怎么來處理粉塵的嗎？布袋除塵器是如何收集粉塵的，天宏環保就以本公司生產的DMC脈沖布袋除塵器為例向大家做一簡單介紹。

布袋除塵器以除塵效率高，結構比較簡單，運行比較穩定，初始投資較少，維護方便等諸多優點正被用于各種除塵系統中。（The bag dust collector has many advantages such as high dust removal efficiency, simple structure, stable operation, less initial investment, convenient maintenance and so on. How to collect dust in cloth bag dust remover, Tianhong environmental protection take the DMC pulse bag filter produced by our company as an example to make a brief introduction to everyone.）

含塵氣體在引風機吸引力的作用下進入灰斗，經導流板后被均勻分配到各條濾袋上。粉塵被攔截在濾袋外表面，氣體則穿過濾袋，經過凈氣室后排出。（The dust-containing gas enters the ash hopper under the force of the induced fan and is evenly distributed to each filter bag after passing through the guide plate. The dust is intercepted on the outer surface of the filter bag, and the gas passes through the filter bag.）

落在濾袋外表面上的粉塵會導致濾袋透氣性的減少，使除塵器的阻力不斷增加，等到阻力達到設定植（差壓控制）或是過濾的時間達到設定值（時間控制），通常處于關閉狀態的脈沖閥在脈沖噴吹控制儀PLC脈沖噴吹控制下打開極短暫的一段時間（0.1s左右），高壓氣體瞬間從氣包進入噴吹管，并高速從噴吹孔噴出。高速氣流噴入濾袋是還會產生數倍于噴射氣體的二次引流。噴射氣流與二次引流的共同作用使濾袋內側的壓力迅速升高，濾袋由原先內凹的形狀變成外凸的形狀，并在變形量達到較大值時產生一個很大的反向加速度，吸附在濾袋上的粉塵主要在這反向加速度作用下，脫離濾袋表面，落入灰斗，除塵器的阻力隨之下降。（Dust falling on the outer surface of the filter bag will reduce the permeability of the filter bag and increase the resistance of the dust collector until the resistance reaches the set plant (differential pressure control) or the filter time reaches the set value (time control). The normally closed pulse valve opens for a very short period of time (about 0.1 s) under the pulse injection control of the pulse injection controller (PLC). High-speed airflow into the filter bag will also produce several times as much gas as the secondary drainage. The combined action of jet flow and secondary drainage caused the pressure on the inside of the filter bag to rise rapidly, and the filter bag was made from the original. ）　　

過濾狀態　　將粉塵從濾袋表面清除的過程稱為清灰。清灰工作是一排一排進行的。脈沖閥每動作一次，一排濾袋就得到清灰。脈沖閥按照設定的時間間隔與順序依次動作，直到完成一個循環。整臺除塵器就完成了一個清灰周期。在差壓控制方式時，下一個清灰周期的開始與否取決于除塵器的阻力。在時間控制方式時，下一個清灰周期的開始與否取決于過濾時間。差壓控制方式可以使除塵器的阻力保持在一個動態穩定狀態，還可以減少壓縮空氣的噴吹次數，減少壓縮空氣的消耗與濾袋的磨損，一般宜采用差壓控制方式。（The process of removing dust from the surface of the filter bag in the filter state is called ash removal. Ash cleaning is carried out in a row. Pulse valve each action, a row of filter bags to get ash removal. The pulse valve operates at set intervals and in sequence until a cycle is completed. The whole dust collector completes a ash removal cycle. In the differential pressure control mode, the beginning of the next ash removal cycle depends on the resistance of the dust collector. In time control, the start of the next ash removal cycle depends on the filter time. The differential pressure control method can keep the resistance of the dust collector in a dynamic and stable state, and can also reduce the injection of compressed air. Frequency, reduce the consumption of compressed air and filter bag wear, the general use of differential pressure control.）　

清灰時，如提升閥為開啟狀態，清灰的濾袋仍在過濾煙氣，則稱之為在線清灰。反之，如清灰時，提升閥為關閉狀態，清灰的濾室不過濾，則稱之為離線清灰。清灰時，從濾袋表面脫落的粉塵入灰斗需要一定的時間。在線清灰狀態下，一部分微小粉塵在未落入灰斗前，就有可能又被吸附現象叫做粉塵的“二次吸附”。離線清灰可以有效地消除這種二次吸附現象，因此清灰效果更好。（When cleaning, if the lifting valve is open, the filter bag is still filtering smoke, it is called online ash cleaning. On the contrary, the lifting valve is closed and the filter chamber is not filtered, so it is called off-line ash cleaning. It takes a certain amount of time to enter the ash hopper from the dust falling off the surface of the filter bag. Under the condition of on-line ash cleaning, some micro-dust may be called "secondary adsorption" of dust before falling into the ash hopper. Off-line ash removal can effectively eliminate this secondary adsorption phenomenon, so the effect of ash removal is better.）