Start-up method and technical application description of dust collector of white ash kiln
Before the dust collector of the white ash kiln is started, in order to protect the "heart-heart" dust filter bag of the ash kiln dust collector, measures of pre-coating powder on the surface of the dust filter bag are required. The particle size of fly ash that can be precipitated by small coal-fired boilers with pulverized coal should be less than 20um, 50% less than 15um, and 25% less than 15um. The dust collector of the white ash kiln is offline before pre-application. After the pre-application, the dust collector of the white ash kiln can be started.
The following is a detailed introduction:
When the dust collector of the white ash kiln shuts down normally, and the dust collector of the ash kiln is offline for one or more days, the following startup methods should be adopted:
"A" When the exhaust temperature of the dust collector of the ash kiln reaches 120℃, start to open the subsequent sub-chambers until all the sub-chambers are opened.
"B" Close the bypass poppet valve.
"C" closes the outlet poppet valves of the first 4 compartments.
"D" energize the ash hopper heater 24h before starting.
"E" makes the dust kiln dust collector online (use the normal dust kiln dust collector start procedure).
"F" turns off the automatic cleaning mode. At this time, as much ash as possible should be left on the filter bag.
"G" drives all outlet poppet valves and population butterfly valves and stays in the open position.
Technical application of dust collector in white ash kiln
<1> Application of off-line maintenance technology: realize the non-stop maintenance function of the dust collector. This will not affect the operation of the dust kiln dust collector due to the dust collector.
<2> Low-pressure injection technology: The use of low-pressure, long-life diaphragm electromagnetic pulse valve, coupled with the unique design and processing methods of the injection pipe, has changed the dust removal method of the bag filter.
<3> Application of detection and monitoring technology: According to the characteristics of the dust collector, online detection and monitoring equipment such as flue gas temperature, humidity, dust collector operating pressure detection, material level detection, and operation equipment failure detection are set up.