What are the precautions for running multiple deaerators in parallel? The deaerator manufacturer advises that to ensure the pressure and water level are the same among the three deaerators, a steam equalizing main pipe is installed on the steam side, and a water equalizing main pipe on the water side. These are connected to each deaerator through valves, allowing the deaerators to operate in parallel (three or any two), or to run independently.
Each deaerator's outlet is connected to the low-pressure feedwater main. The centerline of the deaerator's water tank is 12 meters higher than the centerline of the feed pump's inlet, to maintain a backflow height of 12 meters at the feed pump inlet (approximately 0.14 MPa when adding 0.02 MPa for the water surface). This prevents the feedwater from boiling at 104°C.
Instructions for Use of the Rotating Membrane Oxygen Remover
How much tonnage of deaerator is required, and what is the volume of the配套水箱?
2: Oxygenator accessories requirements (Standard equipment: safety valve, level gauge, pressure gauge, thermometer, water seal tube, roller).
3: The working pressure and temperature of the deaerator (generally divided into atmospheric 0.02 MPa, 104°C and pressurized 0.58 MPa, 158°C).
Rotary Membrane Oxygen Scavenger Protection and Alarm
(1) The water tank and deaerator are equipped with an adequate number of full-blow safety valves, with the quantity and specifications meeting the design technical specifications.
(2) The oxygen removal membrane should be equipped with both local and remote water level gauges, and should have high and low water level alarms as well as safety high and low water level actuating devices.
(3) The pressure-regulating valve for the slide pressure operation deaerator can be eliminated, and an emergency steam shut-off valve can be installed.
(4) Increase emergency water supply by activating the pump (or valve).
To meet the requirements of large-scale power generation units for deaerators, experimental research is to be conducted on the domestic 300 MW thermal power unit's spiral membrane deaerator for the following projects.
Vacuum Oxygen Removal Test.
Random Group Slide Start Test.
Under high-load conditions, dissolved oxygen in water test.
(4) Reduction of water supply temperature and sudden load test.
(5) Random sliding stop test.
Instant Direct Replacement of Water Repellency Test.
(7) Steam Emission Test.
(8) Rotating Membrane Tube Water Skirt Area and Flow Rate Test.
