How to determine fouling in the tower top condenser?
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How to determine fouling in the tower top condenser? The condenser often develops scale due to excessive impurities in the circulating water (tube side). After maintenance, when it was opened, there was only mud inside, along with plastic tape and rags. I wonder how people determine when a condenser is clogged? ? We monitor the inlet and outlet temperatures and pressures of the circulating water in the condenser. A small temperature difference and a large pressure difference indicate blockage. . . . Are there any other ways? ? ?
If there is an error in the thermometer, you can touch it with your hand to see how effective the heat exchange is
Under normal circumstances, one can check the temperature difference between the inlet water and the outlet water
It can also be determined comprehensively by considering the relevant conditions in the processes before and after the condenser
Today at work, I discussed things with a senior colleague and gained some insights; I’d like to share them. . 1. After scaling occurs, the return temperature of the circulating water decreases (due to reduced heat exchange efficiency) ； The valve position of the circulating water control valve will increase (this is a process that occurs gradually). It might not increase much even in a year.) ； The material outlet temperature will increase ； (Not necessarily, as an increase in water volume can also cause cooling.) 2. Another factor is air resistance. It will cause the return temperature of the circulating water to rise (because the gas takes up the space occupied by the cooling water) ； Moreover, when touching the pipelines during external operations, vibrations can be felt, the flow is not smooth, and the sound is abnormal.
The temperature difference between the feed water and the return water, or the temperature at the top of the tower, can be used to determine whether there is a problem. If these values are high and the heat exchanger has no leaks, then the issue lies in poor water heat exchange; backwashing can be used to address this, with the specific method depending on the process conditions.
The temperature at the outlet of the circulating water – it’s also important to take seasonal variations into account; it’s best to make comparisons with data from the same period last year. Consider the effect of material condensation, as well as the pressure difference before and after circulation, and compare these values with the design parameters or those from previous periods. Otherwise, you can remove the component for inspection during a thorough check-up. Hehe: lol. It is recommended to use high-efficiency heat exchangers with a Seccespol spiral-wound structure, which ensures efficient heat exchange. Ordinary circulating water can be used in place of chilled brine, and primary condensation can replace the original secondary or tertiary condensation. Small in size, easy to install, and saves space. No maintenance required in the long term, **reducing infrastructure and maintenance costs.
Reply to 5# Guan Gongyu: If it’s air blockage, how should it be dealt with? waiting、、、、
Reply to 8# Little Student Who Loves to Play: Do you mean the cycle water stage or the material stage? . For material gas blockage, vent it directly from the top. Air blockage in the circulating water generally accumulates at the top of the outlet, affecting the flow velocity of the liquid; therefore, it is sufficient to vent air at the higher points. . .
Reply to 9# Guan Gongyu: There is a drain valve at the top of the outlet side of our heat exchanger. Every time this valve is opened, it seems as though air is being drawn in. The inlet and outlet pipes of the condenser (heat exchanger) have the same diameter. The height of the condenser, relative to the circulation pool, is 17 meters. What’s going on?
Reply to 10# The playful elementary school student: I have this too. . . . . I’ve never seen anyone who can wait like that either. . Otherwise, just post it. See what others think. . .