High level fuel tank installation
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What are the specific requirements for the installation of high-level fuel tanks? What is the support and height of the high-level fuel tank? Is the manned space frequently opened?
For the installation height, please refer to the construction drawings of the design unit (the compressor manufacturer's system diagram has the minimum required value, which can also be referred to, but the construction drawings are the main ones). There are clear requirements on it, which seems to be at least 5.0 meters above the center line of the compressor shaft. The manhole must be closed, otherwise the lubricating oil will be contaminated and the oil will deteriorate.
I don’t know what the standard is for the height, but I think it should be self-flowing and can be arranged according to the site. Our coking unit is about 3-4M
By the way, the manhole must be closed, otherwise it will contaminate the lubricating oil and cause oxidation and deterioration of the oil. Only open for cleaning during maintenance
1. The installation height of the high-level oil tank of rotating machinery is provided by the compressor manufacturer. 2. It is generally about 6 meters above the center line of the compressor unit shaft. This ensures that there is sufficient lubricating oil pressure to ensure the lubrication of the bearing bush during the idle time period when the lubricating oil pump fails and the compressor unit is shut down. 3. The high-level oil tank should be closed, and the drain line at the top should have a 180-degree downward opening elbow.
1. The high-level oil tank (also called the parking oil tank) connected to the lubricating oil main pipe must have enough oil to lubricate the bearings during idle running of the rotor. It is generally 7 meters higher than the center line of the compressor. When there is a pressure failure in the pump oil pipeline, the check valve automatically opens, allowing the oil in the high-level oil tank to flow into the lubricating oil main pipe, ensuring the unit is shut down and the bearings are lubricated during idle running of the rotor. 2. Support the frame, which is generally welded with channel steel, and provide a ladder for people. 3. The manhole is closed, and an elbow pipe is installed above the fuel tank to exhaust oil fumes.
The installation height of the high-level oil tank varies according to the specific requirements of each factory's unit. The purpose is to ensure the lubrication of the bearings when the unit stops after the oil pump stops. However, it is worth noting that the height difference between the high-level oil tank and the unit's low oil pressure self-stopping self-induction pressure (converted into pressure) must be lower than the unit's low oil pressure self-stopping value. Otherwise, after the oil pump stops, the pressure generated by the high position of the high-level oil tank exceeds the parking pressure and the unit continues to run. The consequences will be serious.
There are no particularly strict regulations on the installation of high-level oil tanks. The most important thing is the installation height, because when the oil pump does not work, the high-level oil tank needs to supply oil to the unit, and the height is the pressure that supplies oil to the unit. The specific installation height depends on how much oil supply pressure the unit requires. The manhole is only used for cleaning.
The height of the fuel tank shall be as specified in the drawing, and the height shall be determined according to the oil pressure. The manhole of the high-level fuel tank is rarely opened, and is only opened when the tank leaks and needs to be welded and replaced.
The installation height of the high-level oil tank should be determined based on the minimum pressure of the equipment's lubricating oil, and is also related to the density of the lubricating oil. At the same time, determine the volume of the high-level fuel tank according to the protection time required by the equipment. Of course, the manhole must be closed and there should be a breathing port. This is my personal opinion, I don't know whether it is accurate or not.
Regarding the installation of high-level oil tanks, there are the following points to note; 1. The installation height, according to the needs of the compressor, generally ensures a pressure of about 6kg/cm2, that is, the distance between the corresponding high-level oil tank control liquid level and the compressor axis should generally be greater than 7 meters. 2. Where the main project is located, if it is in a cold area, it is best to place the high-level fuel tank indoors ； This prevents oil that cannot return to the main oil tank from clogging in the pipeline during unit shutdown. 3. The level should not be too far away from the oil tank and compressor, otherwise the pressure loss will be too large and oil supply under accident conditions cannot be realized in time.
First of all, we need to understand what the role of the high-mounted fuel tank is. It is mainly used to prevent the lubricating oil pump from malfunctioning. When the pressure lubricating oil cannot be supplied, the oil provided by the high-level oil tank can continue to provide pressure lubricating oil (short-term) to prevent burning of the bearings and shafts. Therefore, the height should be determined according to the lubricating oil pressure required by the bearing. For example, if the oil supply pressure required by the bearing is 1kg, then the height of the high-temperature oil tank must be at least 10m.
It should be possible to press into the bearing by relying on the position difference, and it can be arranged according to the site. 3-4m is enough, as long as there are ventilation holes
The main engine manufacturer has technical requirements, and various models have slight differences. They should be arranged and installed close to the manufacturer's requirements. Our factory's sinking drum requires that the main engine should be 6.5 meters higher than the center elevation of the main spindle.