Analysis of various failures of coal quality testing equipment

1) No heating up: After turning on the smart ash vapour tester, enter the main interface  press the "burner" button, the status bar prompts heating up, but the temperature has  changed. It may be that the switch of the heating power supply is  closed, close the power switch; it may be that the porcelain fuse of the heating power supply in the controller of the ash volatilization tester is burnt out, open the controller of the ash volatilization tester, check whether there is a short circuit,  replace it after removal Porcelain insurance; it may be that the thyristor in the ash volatilization tester controller is damaged, replace the thyristor; the heating power cable between the ash volatilization tester controller  the high-temperature furnace is burnt out due to oxidation  looseness at the joint, reconnect The heating power cable between the controller of the ash vapour tester  the high-temperature furnace; the wiring post in the back cover of the high-temperature furnace is oxidized, loosened  fired, causing the heating power cable in the casing to burn out. Open the back cover of the high-temperature furnace  replace it Terminal, reconnect the heating power cable. Coal  rock analysis 2) Press the "power" button to start the ash volatilization tester, no prompt sound, no screen display: the gray volatilization tester controller power supply is  connected, the power should be reconnected; the ash volatilization tester controller power insurance Burn out. Check the power supply with a multimeter for short circuits. If there is no short circuit, replace the fuse; the power supply voltage load capacity is poor, which is expressed as: after starting the intelligent ash volatilization tester for heating, the power supply voltage drops below 200V. Re- a good power supply  use a voltage stabilizer as a complete set,  the grid voltage is low. Use a voltage stabilizer to stabilize the voltage to 220V; if the hearth of the muffle furnace is damaged, replace the hearth; the silicon carbon rod is aging  damaged; replace the silicon carbon rod. 3) Slow heating rate: It may be that the power supply voltage is low,  a regulated power supply should be used to meet the test requirements.

It may be that the furnace wire is aging  should be replaced with a new one. Drying box 1) No temperature rise: The set working temperature of the instrument has  been adjusted well. When the set operating temperature of the instrument is lower than the ambient temperature value, the device will  work, please adjust the set operating temperature of the instrument; the heating switch is  turned on, please   turn on the heating switch according to the required operating temperature; the heating wire contact is poor  If the heating wire is broken, please tighten the heating wire contact nut when the heating wire is  in good contact. If the heating wire is broken, you need to replace the heating wire; if the relay ( contactor) contact is poor, clean the contact of the relay ( a contactor). The sensor is disconnected  connected to the sensor circuit; if the meter is damaged, replace the meter. 2) Excessive temperature fluctuations: The environmental temperature changes too much, improve the environmental conditions  avoid excessive changes in the environmental temperature. If the supply voltage has changed too much, voltage stabilization measures should be taken; the instrument control is slow, repair  replace the instrument. 3) Poor temperature uniformity: the blower motor does  rotate, eliminate the fault of the blower motor electrical circuit; the sample is loaded too densely,  the sample should be loaded according to the instructions to ensure the normal circulation of hot air in the working room; hot air leakage, adjustment The height of the door sealing strip in the door slot is at a suitable position; the air outlet is  adjusted properly, adjusted according to the working temperature  the density of the sample. Sulfur tester 1) does  heat up: the power supply of the sample box is  connected properly, connect the power supply after checking; the fuse is broken, connect the fuse; the silicon carbon tube is broken, replace the silicon carbon tube. 2) The system heats up too fast: the thermocouple is damaged  should be replaced; the temperature-rising thyristor is damaged  should be replaced. Use a multimeter to measure the voltage of the two poles of the high-temperature furnace,  it can be judged (the normal voltage is 110V to 220V jump). 3) Slow heating speed: the silicon carbon tube is aging, replace with a new silicon carbon tube; the power supply voltage is low, external voltage regulator equipment, stable voltage. 4) Air leakage in the air circuit system: Air leakage in the pipeline: the air pipe is broken  aging, it should be replaced  connected correctly; the connection is loose  should be tightened; the air tightness of the smoke filter is poor, check whether the filter cover is tightened; check whether the filter cover is installed There is a sealing ring; check whether the sealing ring  the cover are well matched  there is no damage. Air leakage in the electrolytic cell: The sealing effect of the sealing ring is poor  should be replaced. The sealing ring is dry  needs to be coated with a small amount of petroleum jelly. The cover of the electrolytic cell is  tightened  should be tightened. Air leakage at the purification pipe should be checked for damage to the sealing rubber ring of the purification pipe  replaced in time. The purge tube is damaged  should be replaced. 5) The air flow is unstable  the flow does  reach 1000mldmin: the air system leaks; the air pipe is discounted; the absorbent cotton in the dust filter is blocked  needs to be replaced; the air pipe is blocked by discolored silica gel; the electrolyte is invalid. Reconstitute the electrolyte. 6) The measured result is low: the gas flow is  enough, adjust the gas flowmeter to make the gas flow meet the requirements; the air tightness of the carrier gas system is  good, leaking, check the air tightness,  troubleshoot; the corundum tube is broken, replace the corundum Tube; cracking furnace temperature is  enough; sample delivery is  in place; carrier gas channel is blocked, carrier gas channel should be cleaned in time; electrolyte is invalid (Ph<1), electrolyte should be re-constituted.