The startup pipeline is blocked during the startup of the four-nozzle system
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When the system is first started up, the pipelines may become blocked; to ensure its proper operation, it is necessary to activate the heat absorption hot water tower. Under normal conditions, our plant activates this tower at a pressure of 1.0. What should be done in such situations, and what are the specific requirements regarding the pressure during this switching process? If it is cut after the evaporative hot water tower, does the startup pipeline still need to be treated, and how is it treated?
It is best to perform water cutting at 0.6–1.0 MPa; too low a pressure results in insufficient temperature of the black water, while too high a pressure makes it difficult to establish the flash point； High vacuum flash evaporation leads to over-temperature and over-pressure ； The temperature of the water in the sedimentation tank is high.
The pipelines in use definitely need to be maintained to prevent blockages; we also have to flush them with raw water every time, and if a blockage occurs, high-pressure water is used to clear it. Especially the tube side of the process cooling coil in the Black Water unit needs to be thoroughly flushed. It seems that the design of this part isn’t very reasonable; usually, it’s necessary to open the head and make adjustments after using it two or three times, which is quite tedious. It is said that there is an improved version, one in which vacuum flash evaporation takes place directly at low pressure; it’s not clear whether this will cause overpressure in the ash water due to vacuum Experienced bosses, let’s all share our thoughts. Hehe, learn together* and make progress together.