Internal structure of steam seal cooler

The relevant knowledge about the steam seal cooler is relatively complete and I hope it will be useful to you. Steam seal cooler 1. Mission The function of the steam seal cooler is to bring a slight negative pressure to the leakage pipes of the front and rear steam seals of the steam turbine, so that the leakage steam continuously enters the steam seal cooler through the leakage pipes and condenses into water for reuse in the boiler. 2. Structure and working method The water side of the heat exchanger of the steam seal cooler adopts a four-flow structure. The cooling water first enters the inlet water chamber from the water inlet of the steam seal cooler, and then flows into the tube bundle in the shell. When the cooling water flows in the heat exchange tube, it exchanges heat with the steam entering the shell (steam side). The cooling water absorbs a large amount of steam condensation heat, the water temperature rises, and finally enters the outlet water chamber, and overflows the steam seal cooler through the cooling water outlet. The steam from the front and rear shaft seals of the steam turbine passes through the steam leakage pipe and enters the inside of the shell from the steam leakage inlet of the steam seal cooler. The steam flows through the diversion of the middle partition in the shell, continuously flows between the heat exchange tubes of the tube bundle, and performs heat exchange. When most of the steam passes through the outer wall of the heat exchange tube, it releases a large amount of heat and condenses into water. The condensed water is discharged from the drain port and enters the drain pipe. Since there is some non-condensable air in the leaking steam, in order to allow the leaking steam to continuously pass through the leaking steam pipe and enter the steam seal cooler, the gas needs to be extracted and the air and residual steam should be discharged to the atmosphere through the steam ejector. 3. Installation steps 1. Check whether the foundation of the steam seal cooler is qualified and clean the surface of the foundation. 2. Lift out the steam seal cooler and place it on the foundation, and adjust the level and elevation position. 3. Check the position of the steam seal cooler and whether the interface orientation is correct. 4. Fixed equipment (secondary watering). 5. Connect the pipeline and power supply. Installation precautions 1. The equipment should be placed on a flat site when it arrives at the site. 2. When lifting, ensure that the steel wire ropes on both sides are outside the equipment support and receive even force to avoid deformation or overturning of the equipment. 3. The equipment should avoid the influence of external forces or external moments. 4. When connecting pipelines, the displacement of equipment and connecting pipes should be considered. All interfaces (including valves, instruments, meters, etc.) should be cleaned, and sealing plates (including steel plates, cardboard and other debris) should be removed to prevent pipe openings from being blocked. 5. Whether the power supply parameters meet the equipment requirements. 6. Before starting operation, the entire system should be cleaned to prevent clogging and/or damage of certain equipment. Filters should be considered in the pipelines. 7. All joint sealing surfaces should be evenly sealed to prevent leakage. 8. Conduct a sealing test on the system and eliminate leakage points. 9. Re-inspect and install instruments and meters. 4. When starting and stopping the steam seal cooler, you should pay attention to the following basic steps:: 1. Ensure that the exhaust pipe is unobstructed. 2. The condensed water drain pipe of the cooler should be smooth. 3. Open the cooling water inlet/outlet valve to circulate the cooling water in the cooler. 4. Open the steam inlet valve of the steam seal cooler and start the injector. 5. In order to ensure the cooling of the cooling tube bundle of the steam seal cooler, the water pump should be stopped after the steam seal cooler is deactivated.