What is the purpose of connecting high-pressure nitrogen to the pressure lead line on the Texaco gasifier?
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What is the purpose of connecting high-pressure nitrogen to the pressure lead line on the Texaco gasifier?
The weight mainly serves a protective role, preventing slag from blocking the pressure tapping tube
This high-pressure nitrogen serves as a protective gas: firstly, it prevents the pressure sensing tube from getting clogged, which could affect the instrument’s measurements; secondly, it stops the high temperature in the synthesizer from damaging the instruments, by cooling the pressure sensing tube and allowing the instruments to function under lower temperature conditions; thirdly, it prevents oxidation and corrosion of the pressure sensing tube; fourthly, it enables indirect measurement. This post was last edited by liwei909 on 2009-3-31 at 18:46
This point is the pressure relief point of the vaporization furnace; high-pressure nitrogen is supplied to protect the pressure measurement tube from being ablated by the high-temperature gases.
High-pressure nitrogen can serve to stir and cool, preventing blockages in pipeline equipment
It is mainly used to prevent blockage of the pressure lead pipe by performing purging. For cooling, there should be a separate cooling device.
Then I’d like to ask, is this nitrogen supply kept on throughout normal driving?
Its function is to prevent slag from blocking the pressure relief port, thereby avoiding impacts on the accuracy of measurements. As for the pressure tap not having much effect in reducing temperature, there is no flow of air inside the pressure tap itself; it’s a stagnant environment, so the temperature does not rise. Despite the above advantages, some manufacturers have never used it in practice.
If it isn’t used, can the sensing element operate at over a thousand degrees? This measuring element is not a thermocouple; moreover, won’t the pressure tap be oxidized and corroded at this temperature?
Keep the high-pressure nitrogen valve slightly open after starting up to ensure a continuous flow of nitrogen
1. The high-pressure nitrogen here is equipped with a manual control valve; during operation, it is opened only slightly to prevent fly ash from causing blockages, but it cannot be opened fully, as this would lead to measurement errors； 2. During normal use, the opening degree of the valve is also limited; the specific degree depends on the operating pressure, otherwise it will affect the accuracy of the measurements ； 3. This high-pressure nitrogen is mainly used to prevent the pressure tap tube from getting clogged and to purge it ；
In fact, the high-pressure nitrogen in the pressure guide tube serves mainly to prevent oxidation; however, if the amount added is not properly controlled, it can lead to inaccurate pressure readings. The reason is that the pressure guide tube has been blocked by the refractory bricks in the gasification furnace; in other words, the slag and ash inside the gasification furnace cannot possibly block the pressure guide tube.
It is necessary to prevent blockage of the pressure tapping pipes.
Fainting – don’t mislead people. If the pressure guide pipe is sealed with fire-resistant bricks, how can pressure be transmitted? Completely wrong; in other words, it’s impossible to work in the chemical industry without having studied the principles of chemical engineering
What is a suitable flow rate for high-pressure nitrogen at the pressure guide tube?