对于除尘器来说大多数人都比较热衷于了解除尘设备的工作原理及除尘设备的价格，很少有了解它的正压与负压的，甚至都不知道除尘设备的正压与负压是什么。那么我们__来区分一下它们的区别，方便今后使用除尘设备时使其达到_优的除尘效果，它们有着各自不同的特点，在造型时_要有详细的了解，这点很重要。

For dust collectors, most people are enthusiastic about understanding the working principle of dust removal equipment and the price of dust removal equipment. There are few who know its positive pressure and negative pressure, and even do not know what the positive pressure and negative pressure of dust removal equipment are. So let's differentiate them to facilitate the future use of dust removal equipment to achieve optimal dust removal effects. They have their own unique characteristics, and it is important to have a detailed understanding when modeling.

除尘设备的正压：当含尘气体由风机送入除尘设备的尘端，过滤后由净端排入大气。其主要特点是结构不严，对环境造成污染。由于净化后的气体直接排入大气，因此对于连续操作的除尘设备各室，如因安装需要，清灰的电动阀门放在个室内尘端的进口支管上，支管从各室灰斗接入，由于热烟气进入，提高了灰斗内的温度，则各室尘端和灰斗之间应互相严密隔开，这样净端_可以不设置隔板，烟气直接从除尘设备的顶部排空即可，也可以引至集中设置的高烟筒排气，使烟气中的有害气体成分不至于危害附近的环境。只有烟气露点低于60℃，并且气流分布均匀，无气流停滞的死角时，才能采用这种形式，不然在寒冷地区除尘器的内部将产生严重的冻结。除尘设备的外壁一般不保温，严密性也要求不高，因此造价相对低一些。

Positive pressure of dust removal equipment: When the dusty gas is sent to the dust end of the dust removal equipment by the fan, it is filtered and discharged into the atmosphere from the clean end. Its main characteristic is its loose structure, which causes pollution to the environment. Due to the direct discharge of purified gas into the atmosphere, for continuous operation of dust removal equipment in each room, if necessary for installation, the electric valve for dust removal is placed on the inlet branch pipe of the indoor dust end, which is connected to the ash hopper in each room. Due to the entry of hot flue gas, the temperature inside the ash hopper is increased. Therefore, the dust ends of each room and the ash hopper should be tightly separated from each other. In this way, the net end can be left without partitions, and the flue gas can be directly discharged from the top of the dust removal equipment, or it can be led to the centralized high chimney for exhaust, so that the harmful gas components in the flue gas do not harm the surrounding environment. This form can only be used when the dew point of the flue gas is below 60 ℃, the airflow is evenly distributed, and there is no dead angle of airflow stagnation, otherwise serious freezing will occur inside the dust collector in cold areas. The outer wall of dust removal equipment is generally not insulated and does not require high tightness, so the cost is relatively low.

风机易受磨损，因为风机处于含尘一侧，当气流含尘浓度大时，尘粒粗而硬时，风机易受磨损。由于除尘设备的内部为正压，含尘气体必然从除尘设备的不严密的地方外溢。所以不易安装在室内，也不易处理毒性大的含尘烟气。但是它的经济性比较好，除尘设备的结构可以简单一些，漏风不影响使用效果，从而减少除尘设备的处理风量，除尘设备较小。

Fans are prone to wear and tear because they are located on the dusty side. When the dust concentration in the airflow is high and the dust particles are coarse and hard, the fans are prone to wear and tear. Due to the positive pressure inside the dust removal equipment, dusty gases will inevitably spill out from the loosely sealed areas of the equipment. So it is not easy to install indoors, and it is also not easy to handle toxic dusty smoke. However, its economy is relatively good. The structure of the dust removal equipment can be simpler, and air leakage does not affect the use effect, thereby reducing the processing air volume of the dust removal equipment. The dust removal equipment is smaller.

除尘设备负压的特点：要求除尘设备的外壳严格密封、承受负压大、结构强度高。吸入式布袋除尘器全部处于负压状态如结构上漏风，势必影响除尘设备的除尘效果，增加除尘设备的阻力，并将提高排风机的负荷。处理露点温度60℃以上的烟气时，外壳及灰斗均应保温，漏斗内设停风加热器，以免冷凝出水分，发生粘结腐蚀。风机免收粉尘的磨损，寿命长，运行稳定，含尘气流不外溢，环境条件好。

The characteristics of negative pressure in dust removal equipment: the shell of the dust removal equipment is required to be strictly sealed, withstand high negative pressure, and have high structural strength. If the suction bag filter is in a negative pressure state and there is structural air leakage, it will inevitably affect the dust removal effect of the dust removal equipment, increase the resistance of the dust removal equipment, and increase the load of the exhaust fan. When dealing with flue gas with a dew point temperature above 60 ℃, the outer shell and ash hopper should be insulated, and a stop air heater should be installed inside the funnel to prevent condensation of water and the occurrence of adhesive corrosion. The fan is free from dust wear and tear, has a long service life, operates stably, and the dusty airflow does not overflow. The environmental conditions are good.