Without a good filter material, only the filter material that is more suitable for its working conditions. "The so-called condition conditions refer to the peripheral environment that is attached to the dust filter bag. What material is selected, what kind of filter material depends on the conditions of condition, there is What kind of working condition is to select the corresponding filter material to match it. Only in this way can the dust filter bag reach an optimum state.

There are 9 aspects:

Flue gas

Since my country's raw coal is not selected before use, there are many varieties of variety, and the coal is mixed, and the content is different. It is mainly its thermal value, the amount of sulfur, and volatilizes. It is difficult to distinguish. my country's high quality coal, such as: raw coal, lean coal, white coal, etc., its heat value can reach 5000 large card, volatilize is around 17%, ash component is small; and polar coal, such as: coal gangue, mud carbon Wait, its thermal value is at 800-3000 large card, with volatilization of 50% to 70%, and the amount of carbon particles is large. It can be seen that the difference in heat value, volatilization, and the amount of toner are different. After the coal is burned, the flue gas is generated, and the flue gas enters the dust collector through the pipe, which is called the inlet flue gas, the amount of entrance to the amount of ingress affects the useful life of the dust filter bag. In the case of large inlet flue gas, if the filter is small, the filtering wind speed is large, the pressure of the dust collector has increased, resulting in an increase in the pressure of the dust filter bag, which exacerbates the dust filter bag. Due to the quality of the coal selection, the size of the flue gas is determined, and the size of the flue gas directly affects the service life of the dust filter bag.

Flue gas content

Since the selected coal species is different, it has different dust in the flue gas. When the dust enters the dust collector, the dust is different from the dust diameter, and the diameter dust is taken down with the gravity of the filter bag. The particle diameter of dust generates movability under the action of wind speed. When the dust is intercepted on the bag, the kinetic energy is converted to zero, and it will inevitably generate impact power to the filter bag; under the function of kinetic energy, dust is not flushing the filter bag, if the dust in the flue gas The filtering wind speed is large and the filter bag will withstand thousands of friction and flushing, and the surface fibers of the filter bag are unfolded, and the filter bag filtering efficiency is damaged. Therefore, in response to a large working condition of the dust content, it is necessary to consider the wear resistance of the needle felt, and the purpose is to extend the life of the filter material itself.

Dust particles

The dust content in coal-fired flue gas, because the particle size is usually seen in the naked eye, we will put dust under the microscope, which will find that their shape is different, no rules, look like a blade, and they diameter Are not the same. According to the particle size classification, it can be divided into: coarse dust (greater than 40 um), dust (particle diameter at 10 uN-40 nm), and the micro dust (L0Un or less). Due to their particle size, the impact of the dust filter bag is different, and the dust contains a large amount of acidic substances and alkaline substances, and their diameters are very small, and when the bag is intercepted, the effect of the filtering wind speed Next, it is still not possible to fall off, and remains in the surface of the filter material or enters the filter material, and when combined with the water vapor, the filter material is passed to form corrosion. Therefore, when the filter material is selected, the size of the dust particle size can be used as an indicator of consideration.

Substance species of smoke

Due to the different coal species, dust containing dust is different, and dust can be divided into: organic dust, inorganic dust, mixed dust. The flue gas is mainly for the analysis of inorganic dust. There are mainly elements such as SiO2, Fea, CaO, MgO, Mn, which is mainly based on SiO2 and Fe203, and their particle size is small, under the action of wind speed The flushing frequency of the filter bag is high and the degree of damage to the filter bag is increased. Coal, different coal species SiO2 and Fea content were analyzed in front. For example, the coal, the SiO2 content in the coal is about 55%, but the SiO2 content in coal gangue has more than 60%, and it is conceivable that their presence directly affects the life of the filter bag.

Temperature limit indicator

The temperature is one of the important indicators used in filter materials, and the temperature is highly determined directly with the life of the filter. Filters can be divided into: normal temperature filter, medium temperature filter, high temperature filter. Filters can only prolong the service life at optimum use temperatures. Temperature is too high, and it is easy to combust to the burning bag or even fire on flame retardant relatively weak flame retardation; however, when the temperature is too low, there will be a conventional and corrosion precipitator. Therefore, when the filter is used, the temperature is typically increased from 10 ° C to 20 ° C in the printed point temperature. The temperature of the customer is often provided is displayed on the meter after the sensor test is not true, and the actual temperature of the dust is not true. In general, when the filter is recommended to the customer, the temperature parameters supplied to the customer will increase by 5 ° C to 10 ° C to ensure the service life of the filter material can be ensured.

Acid gas

In industrial dust removal, due to the extension of the combustion of coal, the flue gas contains not only dust, but also acid gas is mainly SO2. Since the flue gas contains water vapor, a strong acid is formed, and the strong acid has corrosive, and the strong acid will penetrate to the fibers, and the higher the temperature of the working condition, the faster the chemical corrosion speed. Therefore, the content of SO2 is one of the indispensable elements in working condition analysis.

Alkaline corrosion

In the third element, it is mentioned that about dust analysis, the flue gas contains a large amount of basic substances such as CaO, MgO and other substances, belonging to the antique dust, the diameter is very small belongs to the dust, under the action of wind speed, it is easy Enter the inside of the fiber, some are discharged directly into the air, but a portion of the dust remains in the fiber blockage filter, while containing water vapor in the flue gas, water vapor and queese dust combined with the paste filtration hole to prevent the filter bag, affect the filter bag Normal service life.

Oxygen content

The flue gas contains oxygen, not strange, but for different filters, we must consider: oxygen content, temperature. When the filter material is in the limit temperature, oxygen will slowly oxidize its filter bag, make the filter bag blue, brittle, directly reduce the life of the filter material itself, so when customizing different filters, oxygen The amount is an indicator that cannot be ignored. The higher the oxygen content, the higher the water vapor content.

Airflow distribution

The distribution of airflow affects the normal use and service life of the dust filter bag. If the distribution of the airflow in the design is unreasonable, the local airflow is too large, and the dust filter bag will work for a long time in this case, which can cause damage to the filter bag, such as: a chamber filter material is destroyed or several filtration The part of the bag is destroyed, so the distribution of airflow cannot be ignored. The usual solution is to design a flush plate in the precipitator, and the effect is to change the direction of the airflow to avoid directly flushing the dust filter bag.

In short, the analysis of the analysis is difficult, and the uncertain factors are more, and the changes in any factor will affect the service life of the dust filter bag. At conditions analysis, customers are required to provide detailed information, making it clear that the external environment used, thereby manufacturing and producing high-quality products that meet specific operating conditions environment.

Changzhou Xiahua Environmental Protection Technology Co., Ltd. (formerly Changhua Screen Co., Ltd.) focused on the production of chemical fiber screening and industrial filter materials for more than 20 years, in 2006. Products are mainly used in the chemical industry filter cloth, sewage treatment plant, steel plant dust removal, thermoelectric factory dust removal, cement factory dust removal, printing and printing industry; automotive glass printing, silk flower printing, electronic circuit board printing, ceramics print. It is currently exported to the United Kingdom, the United States, New Zealand, Malaysia, Indonesia, Vietnam, UAE and other countries.