From what considerations, you can easily choose dust filter bag?
3. Chemistry of gases. In all kinds of kiln flue gas and chemical waste gas, often contain acid, alkali, oxidant, organic solvents and other chemical components. Where the filter bag is selected, the dust filter bag with acid, alkali and antioxidant resistance should be rationally selected according to the chemical composition contained in the smoke.Two, according to the special nature of dust, choose dust bag.1, wetting and adhesion of dust. If the dust is hygroscopic and has a strong adhesion, the filter bag with waterproof membrane filter material is selected.2. Flammability and charge of dust. Some of the dust is flammable, then flame retardant bags should be selected. Antistatic dust filter bag; specially used for charged dust.Three. Dust filter bag is selected according to the dust cleaning way of dust collector.1 、 mechanical vibration bag type dust collector. The filter bag with thin and smooth filter material, soft texture and good vibration wave is required to be selected.2 、 blowback bag filter. Should choose soft texture, stable structure, good wear resistance of the filter bag.3 、 pulse bag filter. The outer filter round bag with frame is usually used. Requirements of thick, wear-resistant, strong tensile resistance.
First of all, to understand the flue gas temperature: the filter can not adapt to the flue gas temperature is very important. If the normal use temperature of filter materials is lower than the temperature of the flue gas, it may cause the bag to be burned out and cause great economic losses. Then, how to select the filter material according to the flue gas temperature? Filter material according to the use of temperature is divided into: normal temperature filter materials below 130 degrees Celsius, medium temperature filter materials 130~180 degrees Celsius, high temperature filter material 180~280 degrees celsius. Know the temperature of the flue gas and the use temperature of the filter material, is the filter material can be selected?.The second step is to understand the composition of the smoke: This includes dust content, specific gravity, particle size, viscosity, smoke water content and other parameters. By understanding these decisions, the dust removal method, the post treatment method and the filtration velocity of the filter materials are presented. Under normal circumstances, large amount of dust, dust relatively sticky and light conditions choose pulse bag filter, filter wind speed most of the control in more than 1.2m/min, a few in 1m/min below.The third step is to understand the amount of flue gas that needs to be handled: the amount of air treated by the dust collector is usually the volume of the working air and the coefficient of air leakage (10%~15%). Know the dust handling air flow, filter wind speed, you can get the total filtration area by formula: S = Q/60V. Where S: total filtration area Q: system handling air V: filter wind speed.
Dust filter bag fabric design should be as far as possible to seek efficient filtration, easy to dust stripping and durable effect. The filter bag dust collector is an important accessory dust remover, bag filter dust removal mode according to the general nature, dust containing gas dust and dust remover is different and select the desired filter bag dust collector, so focus on the selective attention of bag filters are different.First, according to the requirements of working conditions, choose the filter bag of the dust catcher.1, gas temperature. When the gas temperature is below 130 DEG C, the filter bag is selected at normal temperature, and the filter bag is used at high temperature between 130 and -260 degrees centigrade.2, gas humidity. Dust gas is divided into three states according to relative humidity: dry gas (relative humidity below 30%), general state (relative humidity between 30%-80%) and high humidity gas (relative humidity above 80%). When the gas humidity high should choose waterproof film bag.
