What are the handling measures for abnormal water hammer phenomena in boiler steel tubes during boiler operation

First, abnormal water hammer phenomena in boiler steel tubes.

1. Unstable pressure gauge readings on the boiler steel tubes, experiencing water hammer, or even damage to the pressure gauges;

2. Water hammer noise, and in severe cases, vibration of the boiler steel tubes and steam leakage from the flanges.

Second, analysis of the causes of abnormal water hammer in boiler steel tubes.

1. Drastic changes in feedwater pressure and temperature in the boiler steel tubes;

2. Malfunction of the feedwater check valve or feedwater regulating valve;

3. Insufficient air removal from the boiler steel tubes during feedwater pressurization, or excessive feedwater flow rate;

4. Insufficient desuperheating water flow in the boiler steel tubes, causing vaporization of the desuperheating water, or excessively high feedwater temperature, leading to vaporization;

5. Excessively high or rapid inlet water temperature in the cold furnace;

6. Insufficient warm-up of the boiler steel tubes, or incomplete drainage of condensate;

7. Excessively low steam temperature or water carryover in the steam.

Third, abnormal water hammer handling measures for boiler steel tubes.

1. When water hammer occurs in the feedwater steel pipe, partially close or close the feedwater valve, and slowly open it after the hammer subsides.

2. When water hammer occurs in the boiler steel tubes downstream of the feedwater valve, partially close the feedwater valve, open the economizer recirculation valve, and close it after the hammer subsides.

3. When water hammer occurs in the desuperheater, reduce the load on the boiler steel tubes and disconnect the desuperheater, and reopen it after the hammer subsides.

4. When water hammer occurs in the steam steel pipe, close the desuperheater water supply, open the drain valve on the main steam steel pipe, notify the turbine to pay attention to the steam temperature, and increase drainage.