Improve the service life of the roller press circulation fan blades several measures

Improve the service life of the roller press circulation fan blades several measures - 2021 01 - 1, 6 meters of snow lotus Liu Minghong dong-qing jiang 2, 3, 1. Anyang iron and steel group co. , LTD. ; 2. Hunan economic and trade vocational college of science and technology; 3. Hunan Chen creek huazhong cement co. , LTD. ) CLF14065 roller press of the company put into use in March 2008, the circulation fan blades wear of roller press system, circulation fan model for M548 № 19 d, flow rate of 150000 m & sup3; 3500 pa/h, total pressure and the 2 ~ 3 months to replace the blades, and once by the blades wear large blades front coil to fly away, due to the large vibration bearing pedestal fracture accident of equipment. To this, the company for wear parts for the structure improvement, and decrease as far as possible into the fan on the use of air dust concentration, obtained the certain effect, will introduce the situation now is as follows. A, the blades wear parts fine powder of roller press system relies on two & Phi; Part of cyclone tube to collect 2850 mm, not to collect the fine powder into the circulation fan, due to the clinker powder and cycle wear on the hardness of slag powder, so, the blades wear. Main wear parts wall plate with the blade root and after fan blades, front and rear wear position as shown in figure 1 section line part of the blade on the right, when the blade wear to a certain extent, blade will be away from the wall after cause equipment accident. Figure 1 fan impeller local, improvement measures (figure 2 1) In equipment manufacturers provide impeller, the blade near the wall after welding on one piece of 120 x 670 & times; 12 wear-resistant plate ( As shown in figure 1 bb section at left) , to prevent wear and blade root in use wear is small the blade root, but wallboard and wear-resistant plate welds after grinding out of the deep pit, serious when wear plate weld will wear out, at the same time after the wallboard wear appear larger. After requiring equipment manufacturer to original welding on the blade wear plate 120 & times; 670× 12 will be cancelled and the back plate welding a 60 & times; 670× 10 wear-resistant plate, as shown in figure 1 right bb profile, in order to protect the wall panel, after then aimed at the front of blade wear, welding wear-resisting electrode on the blade, weld about 10 mm wide, spacing of 20 mm, in order to protect the blade, and the blade welding 1 piece of wear plate at the front of working face, in this way, the impeller wear parts are protected. ( 2) In an observation door open chassis power optimum location, convenient for observation and personnel to enter, timely monitor the wear of the impeller, when the partial abrasion, on-site repair welding for artificial, to prolong service life. ( 3) Using variable frequency speed regulating device, the fan speed to adjust the fineness, the original frequency converter to 35 hz, damper is 50% ~ 70%. Because the faster the speed, the greater the wear and tear, to the highest speed 32 hz, after the fan air door open to 100%, the speed slow down, reduce wear and tear, and can also save electricity. ( 4) Lower fan inlet air dust concentration is a deal with optional inlet duct, belt machine into the V and cyclone dust collector shell and the lower heavy hammer type flap valve leakage, air valve flap lock air leakage can reduce efficiency of cyclone tube to choose powder; The second is to use a good bag type dust collector, wind is part of the bag type dust collector from hoisting machine and other auxiliary equipment, due to the cyclone dust collector can't collect fine dust, from the cyclone dust collector contains many fine powder in the air, if the dust collector is not fine powder collecting down as far as possible, this part the fine powder will always circulating in the air duct, thereby to abrasive wear of the fan impeller, cause blades wear scrap, so the bag type dust collector of damper shall be transferred to the maximum. ( 5) Keep clear V selected sundry, for wear scattered case board timely replacement, scattered and classification in order to achieve good results, the compactness of classifier material choose cloth, curtain material formation, V wind area and the wind pressure are all factors that influence the separation effect of scattered sizing effect is good, you can use less as far as possible the wind, to reduce the fan speed, reduce the wear and tear. Three, the conclusion through the above measures are taken, the service life of the blades from 2 ~ 3 months to 4 ~ 5 months later, enhances the operation rate of equipment. Source: 'sichuan cement'