The problem of changing from steam tracing to water tracing.
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Our factory plans to change all the steam tracing of the ammonia synthesis unit to water tracing, but we don’t have much experience. I wonder if any of our brother factories have any experience in this area. We might as well speak up and learn from it.* study * , improve together, thank you.
The key to using water for heating is whether the temperature can meet the usage requirements.
The advantage of water tracing is that it is stable. When the temperature is too high, some pumps will be affected, such as diaphragm plunger pumps. If it is steam heating, it may not be as good as insulating hot water.
Please ask the host: Where does the hot water required for water tracing come from?
This post was last posted by * Edited by aoye613 on 2009-12-13 08:57 For steam heating and hot water heating, the total heat loss is composed of the following parts: 1) The heat in the medium pipe is lost through the heat dissipation of the insulation layer 2) The heat in the heating pipe is lost through the heat dissipation of the insulation layer 3) The heat in the gas space composed of the medium pipeline, the heating pipeline and the insulation layer is lost through the heat dissipation of the insulation layer. Calculate and analyze the heat dissipation loss of steam tracing and hot water tracing pipes. The results are shown in Table-1. Medium pipe diameter mm Medium temperature, ℃ Heating pipe diameter, mm Steam tracing heat dissipation loss, W/m Hot water tracing heat dissipation loss, W/m Hot water tracing heat dissipation loss comparison with steam heating heat dissipation, % Single heating 250 80 25 533.06 379.63 71.22 200 80 25 437.80 310.97 71.03 150 80 25 342.41 242.23 70.74 100 70 25 238.19 164.70 69.15 80 60 20 187.94 127.84 68.02 50 60 20 134.56 90.63 67.35 Double tracing 250 80 25 500.02 360.59 72.11 200 80 25 411.02 295.54 71.90 150 80 25 321.88 230.39 71.58 100 70 25 223.90 156.46 69.88 80 60 20 176.76 121.40 68.68 50 60 20 127.09 86.32 67.92 The calculation results show that the heat loss when using hot water tracing is 67-73% of the heat loss when using steam tracing. That is to say, when steam heating is changed to hot water heating, at least 20% of energy can be saved. http://www.hgjz.com.cn/meeting/03/924/%E6%9D%8E%E8%89%B3%E8%90%8D%20%E8%92%B8%E6%B1%BD%E4%BC%B4%E7%83%AD%E6%94%B9%E4%B8%BA%E7%83%AD%E6%B0%B4%E4%BC%B4%E7%83%AD%E7%9A%84%E8%8A%82%E8%83%BD%E6%95%88%E7%9B%8A%E5%88%86%E6%9E%901.ppt The poster can check out the URL I provided to download a PPT file and see if it helps you.
What we use here is 1.3MPa steam tracing, and the effect is good.
When hot water is mixed, a 32-inch stainless steel pipe should be used for the hot mixing pipe. The number of hot mixing pipes is one or two more than that of steam.