Cleaning Heat Exchangers with High- and Ultra-high-pressure Water Figure 6: Typical 'Dirty' Bundle with Crude
Figure 7: Peinemann Outside Bundle Cleaner – Typical with High Water Flow
Figure 8: Horizontal (a) and Vertical (b) Cleaning with One Single Lance Tube Cleaner A B
improved heat exchange capabilities and second, because it requires longer intervals before it needs to be cleaned again. The results of using the correct equipment are an improved heat exchanger and fewer shutdowns. With semi-automatic cleaning you will eliminate the variables which an operator brings to the cleaning process, such as uneven cleaning when not feeding the hose into the tubes at an even speed. Even though you are still operating with high pressures when carrying out semi-automatic cleaning, the risks have considerably decreased. No longer is there the need to hold hoses manually (remote control) (see Figure 9), which could easily cause physical damage and increase fatigue-related accidents. Only use manual when there is no
28
other choice. Luckily, you can see a clear trend in countries enforcing semi-automatic cleaning.
What to Use
The question of the right combination of volume and pressure is still up in the air but every type of material has a threshold jet pressure. This is the pressure required to break the material. Below this pressure there is no effect. When this pressure is reached, the most effective cleaning is achieved by optimising the flow rate at this pressure. By finding the right pressure the best way to increase material removal is to increase the power by increasing the flow rate.
HYDROCARBON WORLD – VOLUME 6 ISSUE 1
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84