The quality of the condensate water in the heat exchanger is not up to standard

Was purging done before commissioning? Has the raw water been sampled?

All the heat exchangers in our plant are floating-head type: there are 7 vertical heat exchangers, numbered 1#-7#, and 3 horizontal heat exchangers, numbered 1#-3#. The flow direction of the steam is as follows: the main steam pipe passes through the 1# and 2# vertical heat exchangers, then enters the 1# horizontal heat exchanger before reaching the condensate tank. The main steam pipe also passes through the 3#, 4#, and 5# vertical heat exchangers, then enters the 2# horizontal heat exchanger and subsequently the condensate tank. Lastly, the main steam pipe passes through the 6# and 7# vertical heat exchangers, then enters the 3# horizontal heat exchanger and finally the condensate tank. For industrial water, it flows in the reverse direction: first into 3 horizontal units, and then into 7 vertical units. In the past month alone, 7 samples were taken; either the iron content was not up to standard today, or there was an issue with hardness the next day, or the sodium level was not acceptable the day after that. The pH level was often on the acidic side as well, and the conductivity levels also failed to meet the requirements. There is no pattern at all to be seen. The heat exchanger was cleaned before use, and it has not been shut down since winter began.

The image was uploaded, but for some reason it doesn’t show up.

Regarding the issue of substandard water quality you mentioned, which specific components are above the acceptable levels? Haiyou needs to analyze it for you based on the actual water quality

It is recommended to take samples for analysis in order to determine whether it is a device issue or an initial contamination problem in the pipelines, based on the components involved

16.1.19 16.1.22 16.1.24 16.1.19 16.1.22 16.1.24 16.1.19 16.1.22 16.1.24 16.1.19 16.1.22 16.1.24 Conductivity standard value ≤10μs/cm Iron ≤50µg/l Hardness ≤2.5µmol/l Sodium ≤100µg/l 1# Soda 29.9 14.28 2.47 62 54.5 10.5 9.08 Not measured Not measured 364 135 89.4 2# Soda 3.45 17.17 2.48 4.6 52.4 8.5 Not measured Not measured Not measured 10.7 539 159 3# Soda 2.84 3.87 3.1 77 167.6 8.1 Not measured Not measured Not measured 9.8 11.5 53.9 4# Soda 10.68 8.06 26.9 19.1 71.7 53.6 Not measured Not measured 6.1 744 166 2640 5# Soda 2.84 3.67 2.32 6.5 115 10.1 Not measured Not measured Not measured 33.2 14.1 145 1# Water 3.97 3.31 3.54 90.6 38.9 12.2 Not measured Not measured Not measured 9.2 9.8 2.3 2# Water 6.69 8.27 8.82 77 78.2 46.6 Not measured Not measured Not measured 200 282 648 Water tank 17.47 19.77 4.33 56 6.6 71.5 Not measured Not measured Not measured 21.2 60.5 23.8

I originally wanted to upload pictures, but it wasn’t possible, so I typed them in one by one. Thank you all for your concern and help.

Now it’s time for sampling and analysis. Looking at each piece of data, there is no pattern at all. The data has been uploaded, and we have analyzed it; the main aspects to consider are: 1. Pipes, 2. Valves, 3. Water tanks, 4. Heat exchangers, 5. Raw steam. Then there are issues related to waste discharge and cleaning; these are all factors that lead to non-compliance. Data has been collected, but it shows no pattern at all, making it impossible to determine whether the problem lies with a particular heat exchanger, or with the water tank or pipes. Following the 2-8 principle, efforts are being made to identify the unit with the most serious problems, but this data makes it difficult to proceed. . . . .

Conductivity, iron, pH – sometimes acidity as well, sodium, and hardness; these appear occasionally as well