What is one of the key indicators that hydrazine levels are acceptable in the system?

The presence of hydrazine in boiler feedwater is crucial for controlling corrosion and preventing the formation of harmful acids, and the measurement of its effectiveness often revolves around ensuring adequate flow through treatment systems. Establishing flow through one polisher is significant because it demonstrates that the water is being adequately treated, potentially allowing for the appropriate levels of hydrazine to be maintained.

When flow is established through a polisher, it also indicates that the system can effectively remove impurities and control the levels of dissolved oxygen, which can react with hydrazine, thereby confirming that the chemical is functioning as intended. Proper operation of a water polisher is key in ensuring not just the removal of impurities but also in verifying that the necessary hydrazine concentration is being maintained as part of the water treatment process.

In contrast, constant pressure monitoring, increased temperature readings, and full feed flow stability, while important aspects of system operation, do not serve as direct indicators of hydrazine levels or the effectiveness of its use in controlling corrosion. These factors may reflect broader system health or operational conditions but lack specificity regarding the status of hydrazine in the system.