Can a reciprocating compressor operate at 50% load for a long time?
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The unit is equipped with a set of reciprocating hydrogen compressors (opposing balanced reciprocating piston compressors with two stages of compression), model: 2DW20-27.39/5.5-22. The design pressure is 0.45–0.55 MPa, with a flow rate of 8000 Nm3/H. Currently, due to production requirements, the hydrogen pressure is set at 0.35–0.45 MPa, and the flow rate ranges from 1500 to 3000 Nm3/H (sometimes low flow rates are achieved by using a return line). The temperatures of the primary and secondary exhaust gases often exceed 118°C, triggering an alarm; operation stops when the temperature exceeds 128°C. The management has requested that the equipment operate at 50% of its capacity (in three different operating modes: 0%, 50%, and 100%). However, the maintenance staff claim that operating the equipment at 50% capacity for extended periods can lead to malfunctions and shorten the lifespan of the components. Is this true? 2334
Reciprocating compressors can operate at 50% load for extended periods, but the following factors need to be taken into consideration: 1. Equipment design and manufacturing quality: If the equipment is of high quality and its components are durable, allowing for a long service life, then operating it at 50% load for extended times will not have a significant impact on it. 2. Proper maintenance: Regular maintenance to keep the compressor in proper working condition can extend the equipment’s service life. 3. Is the working environment good? Operating the compressor in a clean and well-ventilated environment can reduce the incidence of equipment failures. 4. Operating time and load distribution: When a reciprocating compressor operates at 50% load for extended periods, it is necessary to arrange the load distribution properly to prevent the equipment from being overloaded or running idle for long times. In summary, operating at 50% load for extended periods is feasible for reciprocating compressors, but it is necessary to take note of the factors mentioned above and implement appropriate measures to ensure the proper operation of the equipment and extend its service life. .
When a hydrogen cooler is installed on the return line, it is possible to maintain low-load operation for an extended period of time.
It’s obvious that it’s a polysilicon project: lol
The design of large reciprocating compressors features double-acting cylinders, meaning that during operation, one side of the piston is always engaged in suction while the other side is engaged in compression; as a result, the forces acting on the connecting rod and the big end bearings remain balanced at all times. At 50% load, one cylinder does not do work; the piston on that side goes through the intake-compression-intake cycle. The connecting rod and the big end bearings also undergo a repetitive cycle of working, idling, and working with each rotation, and uneven stress can lead to abnormal damage of the connecting rod, big end bearings, and connecting rod bolts. If this situation persists for a long time, it is still recommended to purchase a compressor with lower capacity, one whose power supply and operating power are both lower than those of the current model; long-term use will allow the investment to be easily recouped.
Two reasons: 1/ the piston force is high at 50% load； 2. The reverse angle at the crosshead is small, which makes it easy to have insufficient bearing shells
There are many processes involved in pre-hydrogenation, such as aviation fuel, hydrorefining, UOP’s continuous reforming, and so on. How do you determine that it is a polysilicon project? I’d like to learn more about it
Modifying this piston compressor isn’t difficult at all – just remove two valves from each of the inlet and outlet ports. The motor’s current consumption will also decrease by 30%. Give it a try; it saves energy and is convenient, with the possibility to install additional valves at any time
Is the cylinder oil-lubricated or oil-free?