The insulation method of pulse bag filter is well known. Pulse bag filter can filter and clean the processed gas through it. The quality of its dust removal effect is related to various factors, and the use temperature is one of the factors. Below, the editor will explain the insulation method of pulse bag filter. 1、 The insulation layer of the pulse bag filter should be equipped with support components, which should be placed above flanges and other areas, and their position should not affect the disassembly of bolts. 2、 The insulation material is made of high-temperature glass wool with a density of 32 kilograms per cubic meter. 3、 Specification of high-temperature glass wool for pulse bag filter: 50 * 600 * 1200 (MM). 4、 The expansion joints of each layer of layered insulation should be staggered. 5、 The protective plate on the outer layer of the pulse bag filter is a rolled groove color steel plate. Application design of pulse bag filter: The construction of pulse bag filter mainly consists of fan, box, ash discharge device, control system, etc. It is determined according to the properties of smoke or dust, application scenarios, dust particle size, viscosity, gas temperature, moisture content, dust concentration, and different filter materials. The pulse bag filter is all placed in a circular steel plate welded box, which has a convenient structure and operation. The lower part of the pulse bag filter unit is directly connected to the dust removal equipment such as the warehouse top, material bin, and belt transportation with flanges for on-site dust removal, and the dust is directly recovered. Reforming the structure and pulse valve has solved the problems of outdoor placement and low compressed air pressure. According to different diameters of filter bags, different arrangements of filter bags in each chamber, and different filtration areas, pulse bag dust collectors can be divided into three different series. They are combined into rows based on the chamber, divided into single and double arrangements. The dust concentration of pulse bag dust collectors is generally allowed to be below 50g/Nm3. If required, they can be designed according to user requirements. It has two types of dust cleaning functions: timed and pressure differential, as well as various automatic controls. Generally, under stable working conditions, timed dust cleaning can be set. For different smoke and dust working conditions and dust removal system requirements, constant pressure differential dust cleaning can be set to ensure stable operation of the dust collector. The pulse bag filter is a breakthrough in bag filtration efficiency, achieving continuous operation. It has the characteristics of simple operation, continuous dust cleaning, stable resistance, high filtration speed, no internal moving parts, and simple design, making it a powerful bag filter. With the implementation of the new environmental protection standard "Emission Standards for Air Pollutants in the Cement Industry", pulse bag filters are widely used due to their dust removal, stable operation, good adaptability to load changes, particularly suitable for capturing fine dust, ability to achieve non-stop maintenance, and convenient maintenance and management. Now let's take a closer look at its application design. The ash hopper, air inlet device, middle box body, and upper box body are all negative pressure devices, and their strength must be sufficient to prevent them from being sucked down. Therefore, the pulse bag filter should be made by welding steel plates with a thickness of 5mm and attaching strong angle steel on the outside. There is a diagonal partition in the middle of the middle box, which slows down the large particles of dust when they hit the partition and directly settles in the ash hopper. This approach can reduce the filtration load on the filter bag and extend its service life. The upper box mainly controls its cross-sectional height, with the aim of achieving a balanced airflow direction when the purified gas passes through the space of the upper box, without causing wind resistance due to a small cross-sectional area. As the filtration progresses, the dust layer attached to the filter bag will gradually thicken, the permeability will decrease, and the resistance will correspondingly increase. The efficiency of the pulse bag filter will decrease, and dust cleaning is required at this time. The entire dust cleaning system consists of a controller, control valve, pulse valve, compressed air bag, spray pipe, oil-water separator, pipeline, etc. The design of this system mainly starts from the selection of pulse valve, the size of the blowback bag capacity, and the structure of the blowback pipe. I believe that as long as the selection is appropriate and the maintenance is in place, the pulse bag filter will achieve good results in the dust removal system of the cement dry normal kiln head and tail. The working principle of pulse bag filter: The pulse bag filter is composed of ash hopper, upper box, middle box, lower box and other parts. The upper, middle and lower boxes are divided into compartments. During operation, the pulse bag filter will introduce dust containing gas into the ash hopper through the air inlet duct. Coarse dust particles will directly fall into the bottom of the ash hopper, while fine dust particles will enter the middle and lower boxes with the turning of the airflow. The dust will accumulate on the outer surface of the filter bag, and the filtered gas will enter the upper box and be discharged into the clean gas collection pipe exhaust duct through the exhaust fan to the atmosphere. The dust cleaning process involves first cutting off the clean air outlet duct of the room, so that the bag in the room is in a state of no airflow passing through (stopping the air and cleaning the dust in each room). Then, the pulse valve is opened and compressed air is used for pulse blowing to clean the dust. The cut-off valve is closed for a sufficient time for the dust peeled off from the filter bag to settle in the ash hopper after spraying. The pulse bag filter avoids the phenomenon of dust adhering to the adjacent filter bag surface with the airflow after leaving the filter bag surface, allowing the filter bag to clean the dust. The programmable controller is used to fully control the exhaust valve, pulse valve, and ash discharge valve.
