Boiler Safety Series |Boiler Auxiliary Equipment Common malfunctions and Solutions

During the operation of the boiler, due to the failure or damage of auxiliary equipment, such as combustion equipment, water supply equipment, water treatment equipment, ventilation equipment, and dust removal and slag removal equipment, the boiler is forced to stop operation, which is called boiler failure.

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Boiler failures often occur during?the boiler operation. In the previous article, EPCB prepared a series of boiler safety content for everyone, analyzed common boiler accidents and failure causes, and gave corresponding preventive measures. Today, I will mainly introduce the boiler?auxiliary equipment?common malfunctions?and solutions?in boiler operation.

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The boiler auxiliary equipment often fails: oil-fired gas boiler burners, water pumps, fans, water supply treatment equipment, etc. Through years of theoretical accumulation and field practice, EPCB has summarized?these boiler auxiliary equipment?common malfunctions and solutions.?

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Oil /Gas Boiler Burners?

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Burners Common Malfunction and Solution

1.The burner does not start

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? 2. The burner stops immediately after starting

Cause: lack of phase

Solution: Press the thermal relay reset button

3. The burner is locked immediately after pre-blowing, and the flame appears

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4. The burner locks after the flame appears

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5. Pulsating ignition or unstable flame

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6. The burner can't burn a big fire

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7. The second nozzle sprays oil but cannot reach the position of the damper

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8. Unstable oil supply

Cause: It may be caused by the pump or oil system

Solution: Keep the fuel tank close to the burner

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9. Rust in the oil pump

Cause: There is water in the fuel tank

solution: drain the water in the fuel tank

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10. There is noise and the oil pressure is unstable

Cause: there is air in the oil inlet pipe

solution: tighten the joint

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11. The negative pressure value is too high (above 46.6kPa)

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12. The pump does not start after a long interruption

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13. Pump leakage

Cause: oil leaking from sealing parts

Solution: change the pump

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14.?Smoke: black smoke

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15. Smoke: white smoke

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16. Dirty burning head

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17. The burner does not start

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18. The burner does not start but locks up

Cause: there is a simulated flame

Solution: replace the control box

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19. The burner starts but stops at the maximum damper position

Cause: The contact of the servo motor of cam 2 did not reach the terminal of the operation control panel

Solution: adjust cam 1 or replace the motor

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20. The burner starts but immediately stops

Cause: no midline

Solution: lay out the neutral line when three-pole power supply

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21. The burner is locked after starting

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22. The burner stays in the pre-purge stage

Cause: the servo motor contact of cam 3 does not function as the control box terminal

Solution: adjust cam 3 or replace the servo motor

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23.?After the pre-purge and safety time, the burner is locked and the flame does not appear

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24. The burner locks when a fire occurs

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25.Burner repeated start section without locking

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Cause: The main line gas pressure is very close to the value set by the minimum gas pressure switch. After the solenoid valve is opened, the change of air pressure causes the pressure switch to open itself, the solenoid valve is immediately closed, the burner stops, the pressure starts to rise again, the gas pressure switch is closed again, and the ignition cycle is repeated, and this is repeated.

Solution: reduce the operating pressure of the minimum gas pressure switch or replace the gas filter

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26. Locked but no symbol indication

Cause: simulated flame

Solution: Replace the controller

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27.?Burner locks up during operation

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28. Lock when the burner is shut down

Cause: there is still flame or simulated flame in the combustion head

Solution: clear the flame or replace the control box

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Burner maintenance

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1.?Burner Cleaning and maintenance

Loosen the burner hinge shaft and open the burner head, clean the burner parts with detergent or a rag, check and adjust the ignition rod gap, wipe the flame detector with a clean soft cloth, and carefully clean the air duct and fan impeller.

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2. Maintenance of the oil circuit system

Disassemble the fuel line, clean the filter, and open the drain valve of the daily fuel tank to remove water and oil impurities.

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3. Maintenance of the circuit system

Check whether the connection points are firm and the contact components are intact.

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Water Pump?

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1.Reciprocating pumps?

Reciprocating pumps?Common?malfunction and solutions

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2. Electric centrifugal pump

Electric centrifugal pumps Common malfunctions and solutions

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Fans?

Fans Common?malfunction and solutions

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Water Supply Treatment Equipment?

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Water Supply Treatment Equipment?Common Malfunctions and solution.

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At present, the sodium ion exchanger widely used in boiler feed?water treatment equipment.

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Conclusion:

Through the above content, you can have a comprehensive understanding of the common faults of boiler auxiliary equipment, understand the boiler faults and take corresponding measures to actively prevent them, and your boiler can be used more safely and lastingly.

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EPCB, your private boiler system expert!