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I was wondering if there are pressure-type steam traps, where the steam, after being used in the reboiler, returns to a collection tank through such a trap. Which type of drain valve can ensure that condensate is collected in the designated tank?
Most standard models of steam traps can withstand 80% back pressure; you can check that. It is said that the traditional hanging bucket is very effective ; The ST type was chosen for our steam superheater condensate recovery system, mainly because its installation direction can be adjusted arbitrarily. It recovers 3.5 kilograms of water per unit time, which is intended to be used for heating the alkali washing pipelines; however, it has not yet been put into use after the modifications were made, and no filter has been installed either. It is simply mounted on a vertical pipeline that is part of the relatively horizontal drain pipeline – it’s not clear what the effectiveness of this setup is. In my opinion, the recovery of condensate from steam systems requires a comprehensive approach across the entire plant; it’s better to have professional manufacturers handle the design and selection. The moving components inside steam traps should be considered part of the equipment management system, and such devices are referred to as steam traps.
Generally, this type uses a free-floating ball mechanism. I have been in TLV sales for 7 years; if you need it, please send your contact information to QCSALES@126.COM, and we will come to the site for an on-site diagnosis
It also depends on how high your steam pressure is; if the pressure is too low, even a steam trap may not be able to collect the condensate back.
This post was last edited by flute6 on 2009-10-10 08:23. First, let’s look at the principle: when steam condenses, it releases the energy required for vaporization (latent heat), thereby forming condensed water. Condensate water contains only the energy present in water at its saturation temperature (sensible heat energy). However, to ensure the highest possible heat transfer efficiency in the steam system, this condensate must be removed from the system. Additionally, some non-condensable gases and air generated in the boiler, as well as the air present in the pipes at the time the steam system is started, also need to be removed from the system. At the same time, it is necessary to retain the useful steam, and it is an automatic device – the steam trap – that carries out these functions. Category: Float-type steam traps; currently, the dominant type of product internationally is the link-type float steam trap. In addition to their function of draining water and preventing steam from entering, steam traps must also have good air drainage capabilities. All Spiraax floating-ball steam traps are equipped with a thermostatic air drainage device, TV, as standard. Some steam traps, in addition to having an air discharge mechanism, also come equipped with a steam lock release device. They are primarily used in situations where steam blockages prevent condensate from reaching the steam trap, namely in what is known as steam lock conditions, such as when using siphons to remove condensate (in rotary drum equipment) or when there is a long pipe section in front of the steam trap. The float-type steam trap discharges condensate immediately once it is generated, and it is capable of quickly removing large amounts of condensate in response to changes in pressure and load. Its discharge capacity is higher than that of other types of traps with the same diameter; therefore, it is the best choice for various heat exchange devices that require high performance and where water accumulation is not allowed, as well as for devices equipped with automatic temperature control. At the same time, the outlet of this type of steam trap is always submerged in condensate water, providing a true function of draining water while preventing steam from passing through. Sump trap. Inverted bucket steam traps can be used in high-pressure applications. If the air in the inverted bucket is not removed, it will hinder the proper functioning of the steam trap. Moreover, the exhaust process of the steam trap in an inverted bucket is very slow; therefore, in situations where there is a large amount of air present, a separate thermodynamic air exhaust valve is required. Otherwise, water accumulation in the equipment will occur, affecting heat transfer efficiency. Therefore, it is generally recommended to install a separate exhaust valve to ensure rapid and effective startup of the equipment. Many inverted bucket steam traps require a check valve to prevent the loss of the water seal in case of sudden pressure changes or overheating (flash evaporation). The water seal is one of the key elements that ensure the inverted bucket steam trap prevents steam leakage. The inverted bucket steam trap also discharges condensate at the saturation temperature of steam.
First, you need to tell everyone the steam pressure of your reboiler and the method used for controlling that steam. Next, you need to provide information such as the length of the pipeline leading to the flash tank, the condition of the collection tank (whether it is open or closed), and the height difference between the water inlet of the collection tank and the outlet of the drain valve. In other words, you need to clarify your specific operating conditions so that a decision can be made. Send these details over and I’ll help you take a look
It mainly depends on the pressure before and after the steam trap. For mechanical steam traps (ball type and inverted bucket type), their backpressure ratio is over 80%. In the event of negative pressure, that is, when the pressure after the trap is higher than that before it, it becomes difficult for ordinary steam traps to direct the steam directly to the drain tank; external force (steam drive) is needed to recover it. In such cases, a pump-type steam trap should be chosen when selecting a steam trap.