The secret of zero accident in the production operation of asphalt mixing plant is here

The secret of zero accident in the production operation of asphalt mixing plant is here Preparation before starting

Check

① Understand the impact of the weather conditions on the production day (such as wind, rain, snow and temperature changes) on production;

②Check the liquid level of the diesel tank, heavy oil tank and asphalt tank every morning, and replenish it in time when 1/4 of the oil in the tank;

③ Check whether the temperature of the asphalt reaches the production temperature, if not, continue to heat before starting the machine;

④According to the proportion of cold aggregate, check the condition of aggregate preparation, and the insufficient part must be reproduced in full;

⑤ Check whether the personnel and auxiliary equipment are complete, such as whether the loader is in place, whether the vehicle is in place, and whether the operators at each post are in place;

Preheating

Check the oil supply of the heat transfer oil furnace and the position of the asphalt valve, etc., start the asphalt pump, and check whether the asphalt can enter the asphalt weighing hopper from the asphalt storage tank normally;

boot

① Before turning on the power, check whether the position of each switch is correct, and pay attention to the order in which each part is turned on;

②When starting the microcomputer, you should pay attention to whether it is normal after starting, so as to take corresponding measures;

③According to the asphalt mixture ratio required by the project on that day, correctly set various parameters in the microcomputer;

④Start the air compressor, and after reaching the rated pressure, manually operate each pneumatic valve several times to ensure normal operation, especially the finished product silo door, to drain the residue in the tank;

⑤ Before starting the rest of the equipment, send a signal to the relevant personnel of the entire equipment to make it ready;

⑥According to the circuit interlocking relationship of the equipment, start the motors of each part in sequence. When starting, the operation inspector should observe whether the equipment is running normally. If there is any abnormality, immediately notify the control room and take corresponding measures;

⑦The equipment is idling for about 10 minutes. After checking and confirming that it is normal, you can press the alarm to notify all the staff to start production.

Production

① Ignite the drying drum and increase the temperature of the dust chamber first. At this time, the size of the throttle depends on various specific conditions, such as weather, temperature, mixing material gradation, aggregate moisture content, dust chamber temperature, hot aggregate temperature and The equipment itself, etc., the flame at this time must be manually controlled;

② After each part reaches the appropriate temperature, start adding aggregate, and pay attention to whether the transportation of each belt is normal;

③ When the aggregate is transported to the aggregate weighing hopper, pay attention to observe whether the difference between the reading of the load cell and the rated value is within the allowable range. If the difference is large, corresponding measures should be taken;

④ Prepare the loading locomotive at the waste (overflow) material port, and dump the waste (overflow) material outside the site;

⑤ Increase the output gradually. After a comprehensive analysis of various factors, produce a suitable output to prevent overload production;

⑥ When the equipment is running, attention should be paid to various abnormal conditions to make judgments in time, and stop and start the equipment correctly;

⑦ When the production is stable, various data displayed by the instrument should be recorded, such as temperature, air pressure, current, etc.;

shutdown

① Control the total production and the quantity in the hot warehouse, prepare for downtime as needed, and notify all relevant personnel in advance to cooperate;

② After the qualified materials are produced, the remaining materials should be cleaned up, and no remaining materials should be left in the drum and the dust removal room;

③ The asphalt pump should be reversed, so that there is no residual asphalt in the pipeline;

④ The heat-conducting oil furnace can be turned off according to the need, and the heating can be stopped;

⑤ Record the final data of the day's production, such as output, number of vehicles, fuel consumption, asphalt consumption, and various aggregate consumption by shifts, etc., and notify the paving site and relevant personnel of the relevant data in a timely manner;

⑥ The equipment should be cleaned after all shutdowns;

⑦ Lubricate and maintain the equipment according to the maintenance plan;

⑦Check, repair, adjust and test equipment failures, such as running, running, dripping, oil leakage, belt adjustment, etc.;

⑨ It is necessary to release the mixture stored in the finished product silo in time to prevent the temperature from being too low and the bucket door cannot be opened smoothly;

⑩ Drain the water in the air storage tank of the air compressor.