The combined filter dust remover is mainly composed of upper box, middle box, ash hopper, ash unloading system, injection system and control system, and can adopt a variety of inlet chamber structures. Dust laden flue gas enters the ash hopper from the air inlet through the lower part of the central box; Some large dust particles directly fall into the ash hopper due to inertial collision, natural sedimentation and other effects, and other dust particles rise into each bag chamber with the airflow. After being filtered by the filter element, the dust particles are blocked at the outside of the filter element. The purified gas enters the box from the inside of the filter element, and then is discharged into the atmosphere through the poppet valve and air outlet. The dust in the ash hopper is discharged regularly or continuously by the screw conveyor and the rigid impeller discharger. With the continuous filtration process, the dust deposited on the outside of the filter element is increasing, which leads to the resistance of the bag filter itself gradually increasing. When the resistance reaches the preset value, the ash removal controller will send a signal, first make the lift valve of a filter chamber close to cut off the filtered air flow of the chamber, and then open the electromagnetic pulse valve. The compressed air will spray to the filter element in a very short time (0.065~0.085 seconds) from the air source through the air bag, pulse valve, and nozzle on the blowing pipe. The compressed air expands at a high speed in the box, causing the filter element to produce high-frequency vibration deformation. In addition, the effect of counter airflow causes the dust cake attached to the outside of the filter bag to deform and fall off. After fully considering the settling time of dust (to ensure that the fallen dust can effectively fall into the ash hopper), the poppet valve is opened, the filter bag in this bag chamber returns to the filtering state, and the next bag chamber enters the ash removal state, so it is a cycle until the ash removal of the last bag chamber is completed. The PH-II type combined filter element dust remover is composed of several independent rooms. When cleaning the dust, each room is carried out in sequence, without interference with each other, to achieve long-term continuous operation. The above ash removal process is automatically controlled by the ash removal controller at fixed time or pressure. High reliability design ensures the long-term stable operation of the precipitator with the host machine, with little maintenance work; ● High applicability design, the dust remover can adapt to a wide range of fluctuations in the nature of dusty gas, and can make adaptive non-standard design according to user conditions; ● The special structural design and strict selection of filter materials and parts can meet the extremely strict environmental requirements, and the discharge of the dust remover can be ensured to be less than 50mg/Nm 3; ● Optimized design of inlet and outlet air ducts, with air flow uniform distribution device installed inside, which is conducive to uniform air flow distribution; ● Anti air leakage design to ensure that the air leakage rate of bag filter is minimized (<4%); ● The design of all steel split structure is convenient for the transportation and installation of equipment, and ensures the manufacturing accuracy of equipment; ● The chambered pulse three state ash cleaning technology ensures the best ash cleaning intensity and effect; ● The self cleaning system of the precipitator stops to ensure that the precipitator is always in the best working condition; ● Fixed resistance and timing combined ash removal mode and programmable control system (PLC); ● Automatic over temperature alarm and emergency cooling control; ● Unique nonlinear flow equalizing static pressure nozzle to ensure uniform injection; ● Optional independent ash unloading control system; ● Provide centralized control (DSC remote control) and local control; ● Long life design, the main equipment shall be designed and manufactured according to the service life of more than 15 years; ● Low operation cost and optimized process parameter design are conducive to low resistance, efficient and stable operation of the precipitator, reduce system energy consumption, and effectively reduce the loss of filter material and maintenance work; ● High quality parts are used to improve equipment operation reliability and reduce maintenance work; ● All filter materials and accessories are of high quality, and the average service life of filter elements is generally more than 18 months; ● Special ash hopper design, no obstacle for dust unloading; ● Standardized design can reduce the storage of user's spare parts;