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First, the high temperature liquid pump fault causes and troubleshooting steps: Cause 1, the pump line, the inlet pressure rise â‘´ impeller wind around the location does not match. ⑵ pump not enough to cold, gas pump. Exclude 1: â‘´ motor output line connected to the two phase transfer ⑵ ﹑ connection icing, and open the anti-cylinder or adjust the seal gas pressure. Cause 2, the pump elevation or flow more than. â‘´ motor speed more than. ⑵ impeller or ballistic blockage. ⑶ because the sealing pressure is too large, there is an appropriate amount of gas into the pump. Exclude 2: â‘´ increase speed. ⑵ clean. ⑶ adjust the seal gas pressure. Cause 3, the liquid is not absorbed, indicating a violent pressure thump â‘´ ballistic valve is not open or large ballistic barrier. ⑵ ballistic leak. Exclude 3: â‘´ open or wash. ⑵ cause of dressing 4, motor temperature rise. â‘´ motor failure. ⑵ impeller mouth ring has been rubbed. ⑶ labyrinth seal has rubbed. Exclude 4: â‘´ electrician trimming. ⑵ adjust the gap. ⑶ adjust the gap. Cause 5, sudden stop â‘´ seal gas pressure low chain. ⑵ stuck within the bearing. Exclude 5: â‘´ adjust the pressure. ⑵ wash or replace. Cause 6, vibration or musical sound generated â‘´ fuselage and twist uncompromising. ⑵ pump inlet pressure is too low or other causes of cavitation 怄 cavitation. ⑶ static parts and moving parts have attached â‘· spin machine machine loose. Exclude 6: â‘´ adjust ⑵ adjust the pressure, deflated. ⑶ proofreading â‘· check two, how many from the liquid pump Incident (1) innovation put into operation for the first time to adjust the argon, open West No. Argon pump, the inlet pressure how to get on, take enough to cold, the highest frequency conversion price, filter review, wear Noise into the mouth of the wall review, to solve the steps have no effect, manufacturers debugging on the spot also do nothing. Turn on the East No. argon pump, the pressure goes down quickly, deformity. After the inspection Pa Pa, West imported Argon pump ballistic design is found to be improper, too many elbows, the original crude argon â…¡ Tata kettle is low, so that argon pump inlet NPSH not up to design value, the entrance pressure does not go up. Imported pipe reform, narrowing elbows. Re-start, all deformities. (2) due to argon pump inlet cracking at the top of the pipe, parking overhaul, and then start and found that argon pump running shortly after the pressure fell off, heating backflush, then start, the same is true, Net, since the new fluid, argon pump still not deformity operation. Grilled argon pump was the first small cold box, remove the import filter network, the problem can be overcome. Into the total experience, â…¡ tower into the pearl sand cause: argon pump inlet pipe cracking at the top, after parking, leakage into the pearl sand, and then flow to the crude argon â… roof, heating through the fraction of the upper respiratory tract into the crude argon â…¡ tower. (3) Argon pump sealing gas End of the selection of pressure nitrogen, and soon found that the seal piece of mixed gas discharge pipe liquid discharge, integrated gas barrier that blocked, with a trace amount of water synthesizer integrated nitrogen pressure and found that the water content of nearly 1000PPm,éž² éž´ Nitrogen compressor icing water steel sleeve does not leak carefully, the cause of the problem can be found. Seal gas used to measure the atmosphere, argon pump operation deformity. (4) The first innovation, the adoption of banned refined argon column process, the purity of trace nitrogen in fish white argon is always not the same, the trust is caused by seal gas leakage, study the decision sealed gas to argon argon inlet pressure argon, the consequences of white fish argon Still not like the seal gas is changed back to gauge gas. Initially continue with the second phase of innovation, the addition of refined argon column, white fish like fish. (5) In previous years, it was observed that the running East Turbine pump was found to have leaked into the night and switched to the West argon pump. When it was started, the speed could only be adjusted to 2900 rpm, the inlet pressure of the pump was about 0.58 MPa, Ceiling. Electrician consulted the factory, re-commissioning of the inverter, the speed reached 3600 rev / min, pump inlet pressure rose to 0.8Mpa, liquid can be disadvantageous into the I roof. Third, the liquid pump stop air separation system on the moratorium Do not have a liquid oxygen absorber with liquid oxygen pump sudden stop on the air fraction system is not necessary, the important thing to be aware of is above the insurance, Enhance liquid oxygen emissions and other measures. Some of the liquid pump stops suddenly on the air separation system must not have a large, (1) hydrogen-free argon argon flow in the process of rehydration argon pump sudden stop, the crude argon condenser is still working, weathered a large number of liquid accumulated in the crude argon â…¡ Tower Bottom, so can not return to the crude argon column â… added to rectification, and then back to the tower, so that crude argon â… roof oxygen content increased rapidly, the main cold liquid oxygen level rose sharply, the main cold liquid oxygen level Too low one is the twists and turns in the insurance; Second, the heat transfer area is reduced, the atmosphere eaten recently, the oxygen production rose, so that the main stable working conditions. (2) high and low tower leaving the process of reincarnation liquid oxygen pump sudden stop, a large number of liquid oxygen accumulated in the bottom of the tower, so not to return to the main cold, will make the main cold liquid oxygen level rose sharply, with the same consequences, Sound may also produce nitrogen plug. Therefore, the two processes, if the pump sudden stop, to quickly recover; deformity inverted pump, but also inadvertently operation, to ensure a stable flow of uninterrupted (hydrogen-free argon argon flow suddenly increased, will purify the main cold liquid oxygen , Oxygen purity increases, and even nitrogen plug.). (3) On the process of compression within the liquid pump sudden stop, there will be no need to produce oxygen, nitrogen, argon supply. Above the liquid argon pump pump operation talk about how many points to understand: The first reincarnation of the legitimate argon pump pump operation of the insurance and adverse pump down is not enough, the process shown in Figure 4 is more appropriate, each argon pump has a separate import of rooster Tube, to ensure that the cold, the replacement of the standby pump without more than running the pump; filter, compensator, check valve, safety valve set as described above; other argon pump inlet warmer trajectory so not too fine, or not all warmer Pump pressure is too high, twists and turns in the pump insurance; heating valve to be installed in the pump, in order to protect the heating, the filter can blow away the impurities on the marinade. In front of the more advanced process is that two liquid pump with a standby, standby pump is cold low-speed operation, when the main pump failure shutdown, spare pump can be put into operation immediately deformity, so that the entire installation is not affected. Wrong inverted pump operation is: Continued to reserve pump cold, start, as the seventh "centrifugal liquid pump start" to continue, beware is that cold to be consumed certainly about 98% argon argon , To the rough argon â… roof control valve will take the initiative to small, crude argon â… tower warmer ratio is higher, the purity of crude argon deterioration, micro-oxygen recovery, therefore, when the cold to a corresponding increase in crude argon production to maintain purity stable. In addition, after the standby pump starts, immediately stop running the pump, pay attention to the flow of crude argon to ensure the stability of the tower, not a substantial stable, or unobjectionable main tower conditions.
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