With the continuous development of industrial technology, has taken a variety of high-tech
Operation to ensure that large-scale compressor performance and extend its safe operation weeks
Period, the compressor impeller water jet washing is one of the technologies.
An impeller wash system, water spray
In October 1999, Handan Iron and Steel Power Plant went into operation Goldmark
(DEMAG) produced VK5023-type air compressor, random tape
There is a set of impeller water jet flushing system. Compressor, into the "H"
Shape, the main motor through the gear coupling dragging gear, large gear Nie
All two small gear, low speed pinion ends with two impellers
(1, 2), high-speed small gear shaft for the cantilever rotor, with a third
Level impeller. Compressed air through the two intercooler cooling, solid
Is isothermal compression.
Sprinkler irrigation system flow impeller shown in Figure 1. Water wash
So soluble in water on the impeller and volute of sediment washed out, which restored
Re-compressor better balance and higher efficiency. Equipped with a distillation
The water tank through the pump to flush the water were channeled to compressor 3 leaves
Wheel at the entrance, respectively, at the entrance at the installation of a telescopic tube funnel-shaped spray
. In the compressor running when the water spray nozzle can be covered by leaves
Round filled with the entire flow channel, high-speed rotary impact impeller fog droplets so as to achieve
Cleaning effect, while cooler condensate through the discharge port to
Sewage.
Air compressor running the first three years, because of the sprinkler irrigation system to recognize the
Enough, the set of the system failed to make good use of. Since the beginning of 2004,
The system had several of the targeted operation, has certainly achieved the
The unexpected results.
2 impeller sprinkler irrigation system, application and effect of
May 24, 2004, the compressor 3-axis vibration value from investment
Produced when the 8 / 12μm into 3013 / 2218μm (one or two changes
Not), the Power Plant of Handan Iron and Steel had a second production since the most targeted
Is also the longest of the impeller washing water spray rinse operation. Open
Water pump, the first to 019MPa of pressure valve after the entry of the three impeller
Water line flushing is about 2min, then turn right 2 step-down, a
The appropriate pressure impeller were washed in 1min, then three-axis
Vibration some decline; and then focused on three impeller intermittent
To flush for about 20min, 3-axis vibration value is reduced to 25 / 20μm.
May 27, but also targeted a similar operation carried out with the last three
Grade-axis vibration value dropped to 1612 / 17μm. As of early June, all levels of shaft
When the vibration value is essentially the vibration records of the value of production was flat in Table 1.
Table 1 Compressor 3-axis vibration value
1
/ μm
2
/ μm
3
/ μm
3 Anti-side
/ μm
Axis
/ Mm
717 / 514 13 / 111.31 thousand / 1213711 / 80114
July 11, 2004, air temperature reaches 37 ℃, air compressor
Machine entry guide vane has been automatically fully open, but the outlet air is only
81600m3 / h, the amount of oxygen produced only 15800m3 / h, has
In 2003 compared to the parameters of this situation is a big gap, so to
Of a sub-impeller water jet washing operation. When washing three impeller 1min
For a long time, they clearly felt that a sharp increase in gas export compressor. As
Entrance guide vane automatic tracking was slow, and short period of time the amount of air from the wash
Pre-81600m3 / h into a 85450m3 / h, while the entrance guide vane is also
Gradually from the original fully open (0) automatically closed to 14 ° (0 for the whole
Open, 90 ° for the full-off state). The amount of oxygen is gradually increased to
16160m3 / h. Followed by pairs of two and an impeller of the washing process
, The guide vane is also automatically moves off the direction of the trend.
After I consulted the experts, the basic identified mainly leaf
Round of fixtures, and three closed impeller Road, caused by fouling, but
Such a large parameter changes are surprised and amazed. 1 week after the 7
18 (air temperature 32 ℃), then intentionally similar to the last
The operation, shaft vibration, and no significant change in axial displacement, while the entrance guide
Leaves from the original 712 ° into the balance after the 1516 °, then washed
Process air volume from 82900m3 / h into a 84700m3 / h, results
Obvious.
3 Conclusion
After rinsing to spray on the impeller, shaft vibration and efficiency (gas
Volume) changes to the Power Plant of Handan Iron and Steel sprinkler irrigation system, which the impeller increases
In order to pay attention to it, according to re-enact the actual situation in the operation of water-washed
Program, a weekly special at all levels in the impeller to a second water rinse in order to settle
In addition to floating dust on the impeller and the attachments. Up to now, the Taiwan compression
Machine with no mutation in shaft vibration and air volume shortfalls.
As far as a large air compressor has been installed outside of the impeller impulse sprinkler
Washing system, the domestic production of some models, Shen drum according to user demand for
As the design carried out in order to not affect the normal operation of the compressor
Circumstances at any time flushing operation, so that leaf area increased rotation Road, leaf
Type line similar to the original design type line, the machine running smoothly, life expectancy,
Flow increased to reduce energy consumption and improve compressor efficiency.
For the atmospheric environment is not good, acidic atmospheric conditions of the occasion, using
This technique should produce more significant results.