Turbine speed
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I am an operator of the heavy catalyst device. Usually our deputy director sometimes adjusts the rotation speed of the steam turbine. I don’t know why the rotation speed of the steam turbine is adjusted. Is it based on the pressure of the settler or the processing capacity of the raw materials? I can’t figure it out. Please give me some advice. The speed adjustment I am talking about here is under the condition that the medium-pressure steam pressure is stable, not because the medium-pressure steam pressure drops and the load increases.
The catalytic adjustment speed is based on the settler pressure, not the treatment capacity.
Thank you for your reply. If the pressure of the settler is high, do we need to increase the load and increase the speed of the turbine? Please discuss more. The Haichuan Forum has just been opened, but many of the posts in the forum are too theoretical and not practical at all. However, Bazhu gave them bonus points, but there were few replies and few bonus points for practical posts. I really don’t understand.
I think it is decided based on the processing capacity. The rotation speed needs to be adjusted based on the amount of processing capacity consumed.
When the amount of oil and gas is large, the pressure of the settler will naturally be high. When the air compressor handles a large amount, it can naturally reduce the pressure. If the pressure of the settler is low, it can be adjusted by the anti-flying line. I think there is a close relationship between the speed of the air compressor and the control of the pressure of the settler. I am a very shallow person. Please correct me if I am wrong.
Generally, the suction port of the gas compressor is the oil and gas separator at the top of the fractionation tower, and the amount of gas is determined by the processing capacity, the depth of the reaction, and the cooling degree of the tower top cooler.
I don’t know your device. I think steam turbines are generally not used to generate electricity. At the same time, there are also back-pressure steam turbines or extraction steam turbines used to supply steam. In some cases, as long as the steam turbine is connected to the grid and generating electricity, the speed cannot be adjusted. It is consistent with the frequency of the grid. Adjusting the synchronizer can only adjust the steam turbine. The load of the steam turbine and the supply of steam are adjusted at the same time to meet the needs of production. To adjust the speed of the steam turbine, the synchronizer can only be adjusted under the premise of decommissioning, but that is only when starting and stopping. Therefore, I think this brother has probably not been working for a long time and is not familiar with it.
Generally, the speed of the catalytic cracking turbine has two control methods: remote and local. During the startup process of the unit, it is controlled through the local control method (that is, through the 505 speed regulator). Once the unit is running normally, the turbine speed should be put into remote control, and the signal parameter of the remote control is the settler pressure. If the settler pressure is higher than the given value, the turbine speed should be increased and the compressor pumping volume should be increased to reduce the settler pressure. Otherwise, the turbine speed should be reduced. Another reason is that proper manual adjustment of the speed can prevent the steam turbine adjustment valve stem from becoming salty and stuck. This is because if the system steam pressure is relatively stable, the turbine speed adjustment system is only a dynamic micro-adjustment, and the valve movement space is very small, which is prone to salty jamming and affects the operation of the unit.