Improvement of coal shale shaker

The transformation of coal shale shaker, 2021 - 01 - 15 Wang Zonghe Yang Qingsheng ( A heavy group co. , LTD. Gas branch) Abstract: this paper discusses the technology of vibrating screen and its transformation process. In the gas plant coal conveying system, equipped with two sets of coal shale shaker. The role of the vibrating screen is in 14 mm & times; 14 mm mesh on the screen of the raw coal is divided into two parts, the larger particles on the screen to scroll to the raw coal conveyor belt into the generator gas production, about 15% of the pulverized coal leakage into the bottom of the screen life fuel. Coal conveying system conveying coal amount of a day on average about 500 t. 1, state of equipment factory in 1958 set before modification of mechanical vibration reciprocating vibrating screen works. Works by a motor to drive through the triangle eccentric shaft, eccentric shaft fixed above the screen box for high-speed rotation, on both sides of screen box is fixed on the bow spring board. The device since put into operation, the average overhaul period in 2 years/set, and the overhaul frequent breakdowns a year later, it is difficult to ensure the normal operation of equipment. Because of the large equipment in the dust, the noise big environment, bring great difficulty in operation and maintenance. Although we often make improvement and maintenance, but because of the main structure of the reason, or frequent bearing wear and damage, the spindle diameter of axle wear, sieve box body fracture, the phenomenon such as spring plate fracture, 2 - a week Three such failure, equipment and technical personnel and maintenance workers often have to go to site inspection and eliminate all kinds of faults. , according to a year of vibrating screen fault it happened failure rate accounts for about 25% of the total equipment failure. Annual consumption of materials and spare parts cost is controlled in 70000 yuan, is the equipment factory of htac problem. 2, project analysis, to determine through technical communication and equipment industry technical renovation, in May 1955, we choose the centering crane sieve as research target. Hanging screen USES is the tower body by four spring hanging in the air, on the base of the motor through the triangle power into the screen box of eccentric shaft, when the amplitude of eccentric shaft rotation to produce led screen box, particles is greater than the screen mesh of the coal from under the screen mouth into the production sequence, less than the screen mesh of pulverized coal leakage into the funnel do non-production use of coal. The original fixed screen the effects of the forces are at work on the box body and a fixed spring board, energy release of the force on the spring board is limited, this case the reaction will be huge. After the overhaul of equipment to use after a year of time, and the joint of casing connection, with the eccentric shaft diameter of axle are corresponding appear rupture, welding, looseness, wear and failure. Importantly, the body symmetry in the structure of the weight of the vibrating screen to balance, or you will make big weight on one side of the torque increase, make the body produces relative deformation, that eventually body will produce the phenomenon such as the welding, and cracking. When these problems, we can only adopt the method of welding, this method from the Angle of cabinet design is not reasonable, will make the local side effects of lay particular stress on, replace the sieve box, we do not have conditions, so can only maintain the production. For this reason that the device's failure frequency, often affect production, since the centering crane screen due to the advantage of structure, sieve box of stress at work can fully release in spring. Another tower structure of spring from the force analysis and the use of efficiency is stronger than the spring plate. Tower of the bottom of the spring through a cable connection screen box, box work of shaking force on the four connecting wire rope can be mitigated, beneficial to the continuity and stability of the working equipment. Through the various performance analysis, we decided to adopt the centering crane screen out the original equipment. Under the guidance and assistance of superior equipment power experts, in 1999, installed a hanging screen design, equipment running effect is very ideal. Through several years of operation results, not for overhaul, equipment never fails and affect production, reduce the workload of maintenance workers already, also make the working environment greatly improved. 3, economic benefits from the centering crane sieve and mechanical vibrating screen from the failure rate, the consumption of raw materials, spare parts, power consumption, lubricating oil, and carried out a statistical analysis on the maintenance workload, please see table 1. Statistical calculations from the table, the center crane screen than the cost of mechanical vibrating screen can save a year 6. 50000 yuan. 4, epilogue equipment reform brings us benefits, equipment modification is the foundation of enterprise development. Since the center crane sieve is put into use, 2% of the total failure rate of equipment failure rate in the year, multiplied improve equipment utilization. The transformation for the company both save overhaul expense and maintenance costs, and provide reliable guarantee for gas production. （ Source: screening machinery network)