Reactor seal balance oil tank! !
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I’m not from the equipment field, and I would like to ask about the balance oil tank for reactor machine seals: 1. What is its function? 2. Is the installation location specified? 3. Where does the power for oil operation come from? (No circulation pump) 4. Are there any requirements regarding the quality, temperature, viscosity, density, etc. of the oil? 5. What are the precautions to take during operation? 6. What are the requirements for the pressure inside the reaction vessel and the pressure in the balance tank? 7. What are the special requirements regarding corrosive media inside the reaction vessel? I would be very grateful if the experts could help clarify this for me! ! !
One more question: 8. Should the connection for the oil balance tank be at the bottom where the machine seal inlet is located, or on the side where the machine seal inlet is situated? Since our company currently uses a side-mounted inlet seal and a bottom-mounted outlet seal, which is theoretically the opposite of the conventional setup, we would like to raise this issue; we welcome everyone’s insights on the above matter! ! !
It would be best to include a diagram or photo or something, so that everyone can help analyze the problem for you.
This post was last edited by Lantian on 2018-4-3 at 12:32. Mechanical seals equipped with balance tanks are mostly of the external pressure balance type； In addition to the force of its own springs, the operating pressure of a mechanical seal also relies on the pressure of the sealing coolant in order to balance part of the medium pressure; this prevents the absolute value of the surface pressure on the friction surfaces of the seal from becoming too high, thus ensuring the service life of those friction surfaces. Under normal circumstances, the operating pressure of the mechanical seal (= spring force + seal fluid pressure) is slightly higher than the pressure of the medium that needs to be sealed; generally, the difference between the operating pressure of the seal fluid and the operating pressure of the medium is set at 0.1~0.2 MPa. The function of the balance tank is to provide a pressurized sealing coolant under operational conditions, thereby enabling lubrication and cooling of the mechanical seal through a circulation process ； Secondly, pressure balance is achieved in the parked state by using the pressure of the medium inside the sealed equipment, thereby achieving sealing. Normally, the lubrication and cooling fluid for mechanical seals is supplied through a pump and a tank; if the pump that supplies fluid to the seals stops operating, the lubrication and cooling fluid required by the seals cannot be provided ； With the liquid supply method using a balance tank, as long as there is pressure inside the sealed equipment (such as a reactor), it can be introduced into the balance tank through pressure guide pipes, allowing the sealing fluid to enter the mechanical seal chamber under that pressure and thus achieving pressure balance. https://shop557671810.taobao.com ... &user_id=2279744554
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The analysis is excellent. Our company uses enamel-lined reaction vessels, and no circulation pump is installed in the oil balance tank; heat siphon is presumably used to provide the necessary power. I’m just wondering if there are any specific requirements regarding the installation and operation of such oil seals, such as the height of the balance tank or the length of the pipelines?
The horizontal distance between the seal fluid tank and the mechanical seal should not exceed 1200 mm, while the vertical height between the bottom of the seal fluid tank and the mechanical seal should be between 450–600 mm