Boiler dust collector resistance is divided into two parts, the design of the equipment resistance to 1200Pa, part of the equipment inherent resistance (ie, the original resistance). This is caused by the equipment of the flue gas flow channels. Boiler precipitator air intake and outlet of each part of the flue gas inlet pipe flow rate is appropriate; the uniformity of dust collector of each chamber inlet; the diversion system design is reasonable; the air inlet bag at the bottom of the distance level caused by dust gas flow space is enough; the rationality of filter bag diameter and bag spacing determines the bag between the rising speed of flue gas export pipeline; wind speed reasonable selection will affect the value of the inherent resistance of dust collector.
Operation resistance of bag filter for boiler. A cycle of running resistance equipment by dust collector in the running process of the bag hanging ash layer formed on the surface of the thickness of the resulting value. Generally we set the upper limit of this value in the 1000~1200Pa, in the device to achieve this resistance value, the system starts to clear the ash, the resistance of the equipment back to the original resistance, into the next cycle. The length of the cycle time, depending on the flue gas dust concentration, the variety of specifications, etc..
Boiler dust remover or put into operation for the first time a large number of new change bag, in order to avoid the pollution caused by adherence of paste bag in the bag surface, dust collector needs to be pre coated on the surface of ash, leaving the initial dust layer, forming a virtuous circle. Input filter operating conditions: one is the entrance flue gas temperature should be higher than 120 DEG C, two is no big gun into the boiler. When the main road of the dust collector is closed, the length and the head of the machine should be contacted, and the negative pressure of the boiler should be paid attention to. Hopper heating device in the boiler ignition should be 12 hours before investment.
Boiler dust collector operation
1, boiler precipitator ash is put into operation, operating personnel should closely monitor the filter chamber, the pressure of flue gas temperature, rotation of the motor running state, spray dryer operation, injection pressure, damper and bypass valve to enhance state changes.
2, ash operating personnel should be established and the value of long, host and effective communication mechanism, abnormal temperature, pressure and other abnormal situations, make preliminary judgments, timely report the value of long contact machine leader, take measures.
3 bag, continuous use temperature of 160 degrees, no long-term over temperature operation, ash removal operation personnel found dust remover "overtemperature alarm", should be reported value of long, reduce the exhaust gas temperature to 160 DEG C, in order to ensure the safety and effect of dust filter bag.
4, large amounts of oil boiler combustion, long value shall notify the ash removal operation. In addition to the ash operation personnel should be depending on the differential pressure to reduce the frequency of cleaning or temporarily stop blowing dust, oil fume paste bag.
5, the dust collector when the dust collector system failure need to open the bypass, it should be reported in advance for a long time, to ensure the stable operation of the boiler
6, boiler abnormal shutdown, should stop cleaning, to ensure that the short time after the shutdown back into the gun, the bag in uniform hanging ash