Manufacturer supplies boiler bag filter, Quanzhou bag filter equipment maintenance

Description :

　　There are many forms of wet dust collectors used in engineering. Overall, it can be divided into two categories: low-energy and high-energy. The pressure loss of low-energy wet dust collector is 0.2-1.5kPa, including spray tower and cyclone scrubber. Under general operating conditions, the water consumption (liquid gas ratio) is 0.5-3.0 liters per cubic meter, and the purification efficiency for particles above 10 microns can reach 90-95%. The pressure loss of high-energy wet dust collectors is 2.5-9.0kPa, and the purification efficiency can reach over 99.5%, such as Venturi scrubbers. The performance and operating range of the main wet dust removal devices are summarized in the table below. It is limited to introducing three types of wet dust collectors that are widely used, namely, spray scrubber, cyclone scrubber and venturi scrubber.

　　Device Name Gas Flow Rate m/s Liquid Gas Ratio L/m3 Pressure Loss/Pa Splitting Diameter (in micrometers)

　　Spray tower 0.1~22~3100~5003.0

　　Packing tower 0.5~12~31000~25001.0

　　Cyclone washer 15~450.5~1.51200~15001.0

　　Rotary drum washer 300~750r/min 0.7~2500~15000.2

　　Impact washer 10~2010~500~1500.2

　　Venturi washer 60~900.3~1.53000~80000. 1

　　Overview of the Development of Dust Removal Equipment Industry Dust removal equipment is mainly used in industries with severe dust pollution, such as cement, steel, non-ferrous metals, electricity, machinery, chemical industry, and waste incineration. The changes in the total output value of the dust removal equipment industry are closely related to the domestic and international economic development environment, as well as the development status of downstream industries. In recent years, the total output value (sales revenue) of dust removal equipment in China has fluctuated, increasing from 13.998 billion yuan in 2005 to 29.007 billion yuan in 2008, with an average annual compound growth rate of 27.49%. In 2009, affected by the international crisis, the growth rate of industries such as cement, steel, non-ferrous metals, and machinery in China fell sharply, and some industries even experienced negative growth in output value, resulting in a temporary slight decline in the total output value of China's dust removal equipment industry.

　　Product Maintenance

　　Regularly check the operation of control valves, pulse valves, and timers.

　　The failure of the pulse valve rubber diaphragm is a common fault in bag filters, which directly affects the dust cleaning effect. This device belongs to the external filter type, with a skeleton inside the bag. It is necessary to check whether the parts that fix the filter bag are loose and whether the tension of the filter bag is appropriate. Is the support frame smooth to prevent wear and tear on the filter bag. Compressed air is used for dust removal. Therefore, it is required to remove oil mist and water droplets, and the oil-water separator must be cleaned regularly to prevent malfunction of the moving mechanism and blockage of the filter bag.

　　Whether the air volume and pressure and temperature at each testing point are consistent with the design.

　　The installation status of the 3 filter bags, whether there are any occurrences of bag dropping, loosening, wear, etc. after use, can be judged by visually observing the emissions of the chimney after operation.

　　4. Prevent condensation

　　During use, it is necessary to prevent the gas from cooling below the dew point in the bag chamber, especially when using a bag filter under negative pressure. Due to the frequent leakage of air into the outer shell, the gas temperature in the bag chamber is lower than the dew point, causing the filter bag to become damp. This results in dust not being loose but sticking to the filter bag, blocking the fabric holes and causing dust removal failure. This leads to excessive pressure drop in the dust collector, making it unable to continue operating, and some bags may become stuck and unable to remove dust.

　　To prevent condensation, it is necessary to maintain the temperature of the gas in the dust collector and its system at 25-35 ℃ above its dew point (such as the dew point temperature of 58 ℃ for kiln mill integrated machines, and the operating temperature should be above 90 ℃), in order to ensure the good use effect of the filter bag.

AfterSalesService :

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