Regarding the hydraulic turbine of the hydrocracking feed pump

Is the hydraulic turbine driven by high-pressure oil?

Yes, the hydraulic turbine is connected to the clutch and motor

The hot fraction enters the cold fraction after doing work through a hydraulic turbine

Has no Haiyou provided a suitable one?

Turbine readiness confirmation work – External ( ): Confirm that the turbine is in a state without any process media. Outside ( ) – Verify that the coupling guard is properly installed. Outside ( ) – The mechanical, instrumentation, and electrical aspects of the turbine have been verified. Outside ( ) – Verify that the turbine disk turner moves evenly and smoothly. Outside ( ) – Verify that the inlet filter of the turbine is clean and properly installed. Outside ( ) – Confirm that the cooling water for the mechanical seal oil cooler has been led to the main valve. Outside ( ) – Confirm that the circulating cooling water for the turbine base is led to the main supply and return valve. Outside ( ) – Verify that the turbine lubricant grade meets the specified requirements. Outside ( ) – Confirm that the main valve for the supply and return of turbine lubricating oil is closed, and that the pump lubricating oil system is operating properly. Outside ( ) – Confirm that the 2 Y-type stop valves at the turbine inlet are closed. (1 on the high-temperature high-pressure platform, the other at the turbine inlet) Outside ( ) – Confirm that the drain valve at the turbine inlet is closed. Outside/Inside ( ) – Confirm that the turbine flow control valve is properly tuned. Outside ( ) – Confirm that both valves at the turbine outlet are closed. Outside ( ) – Confirm that the drain valve between the twin valves at the turbine outlet is closed. Outside ( ) – Confirm that the drain valve at the turbine outlet is closed. Outside ( ) – Confirm that the drain valve of the turbine casing is closed. Outside ( ) – Confirm that the warm turbine line valve of the turbine is closed. Outside ( ) – Confirm that the emergency cooling steam and seal purge steam valves at the end caps before and after the turbine inlet manual valve are closed. Outside ( ) – Confirm that the pressure gauge and flow pump are functioning normally. Preparations and checks before starting the turbine: 1) Activate the turbine’s cooling water system – Open the main return valve of the turbine’s circulating cooling water system. External – Open the main feed water valve of the turbine circulating cooling water system. Outside – Open the circulating cooling water supply and return valve for the turbine housing. Outside – Open the inlet and outlet manual valves for the circulating cooling water in the seal coolers at both ends of the turbine. Outside ( ) – Confirm that the turbine cycle cooling water system is unobstructed. 2) Commissioning of the lubricating oil system: Outside – Open the main turbine lubricating oil return valve. Outside – Slowly open the turbine lubricating oil supply manual valve until it is fully open, while monitoring the pressure in the main lubricating oil pipeline to minimize fluctuations. Outside ( ) – Verify that the lubricating oil flowing in the oil return viewports of the bearings at both the upstream and downstream ends of the turbine is normal. Outside ( ) – Verify that the pressure in the lubricating oil main pipe is normal. 3) Commissioning of the sealing system: Outside ( ) – Verify that the high-point vent valves at both the inlet and outlet sides of the turbine are closed. Outside ( ) – Verify that the drain valves at the low points of the seals at both the inlet and outlet ends of the turbine are closed. Outside – Sealing oil accumulators at both the upstream and downstream ends of the turbine. Outside – Open the hand-operated pump outlet valves at both the upstream and downstream ends of the turbine. Outside – Add qualified seal oil to the turbine seal tank to 80-100%. Outside – the handle of the manual pressure pump for the turbine seal, used to raise the sealing pressure at both the front and rear ends to 2.8–3.0 MPa. External () – Verify that the seal oil pressure at both ends of the turbine is normal. 4) Activation of the emergency cooling steam and seal purge steam for the end covers. External – Direct the steam to a point before the main valve, then open the drain valve to remove any moisture. Outside ( ) – Confirm that the steam return valves at both the upstream and downstream ends of the turbine are closed, as well as the main condensate valve. Outside – Open the steam return and condensate discharge valves at both the upstream and downstream ends of the turbine. External – Open the main steam valves at both ends of the turbine. Outside – Slightly open the seals at both the front and rear ends of the turbine to purge with steam. Outside – Slightly open the end covers at both the front and rear of the turbine to cool the steam rapidly. Outside ( ) – Verify that the sealing purge steam at both the upstream and downstream ends of the turbine is unobstructed. Outside ( ) – Verify that the quench steam flow at both the inlet and outlet end covers of the turbine is unobstructed. 5) Warm turbine exterior – Install the turbine outlet safety valve. (One in use, one standby) Outside – Slightly open the twin valves at the turbine exit; fully open when the turbine exit pressure is equal to the pressure of the low-temperature fraction. Outside – Before the heat pump, the sealing pressure at both ends must be set to 2.8–3.0 MPa in order to prevent backpressure on the mechanical seal. Outside ( ) – Confirm that the Y-type stop valve at the turbine inlet is open. (On the hot high-pressure platform) External ( ) – Confirm that the Y-type globe valve at the turbine inlet is closed. (Turbine inlet) Inside – Open the turbine inlet isolation valve. Internal – Open the turbine inlet flow control valve to 10% opening. Outside – Slightly open the pre-heater manual valve. Outside ( ) – Confirm excessive pre-heating line. Outside – Contact the fitter to turn the rotor 180° every half hour. Outside ( ) – Ensure that the temperature difference between the turbine body and the medium is less than 50°C. Outside ( ) – Ensure that the temperature difference between the upper and lower parts of the turbine casing is less than 30°C. Note: The heating rate during preheating should be ≤ 50°C per hour. When preheating the turbine, cooling water and seal oil must be supplied to prevent internal components from being damaged by high temperatures. During the preheating process, the shaft should be turned every 30 minutes to avoid it bending due to heat. The turbine inlet block valve must be opened prior to warming up the pump; when opening it, it is necessary to confirm that the inlet Y-type globe valve is closed. Start the turbine 1) Initiate turbine startup – notify the fitter, electrical crew, instrumentation team, and relevant unit to arrive and get ready. Outside ( ) – Confirm that the turbine outlet valve is open. Outside ( ) – Confirm that the turbine inlet isolation valve is open. Outside – The drum rotates evenly and smoothly. Outside ( ) – Confirm that the seal oil pressure is normal. Outside ( ) – Confirm that the sealing purge steam and the end cover quenching steam are operating properly. Outside ( ) – Verify that the circulating cooling water is unobstructed. Outside ( ) – Ensure that the lubrication pressure at the lubrication station is normal, so as to provide smooth lubrication to the turbine. Outside – Close the turbine preheater valve. Outside ( ) – Confirm that the turbine preheating temperature has reached the startup conditions. Internal – Verify the interlocks associated with the SIS system indoors, and check whether the SIS system is ready for operation. Internal/External – If the conditions for starting up are met, inform the operator on site to slowly open the Y-shaped stop valve at the turbine inlet; once the turbine begins to operate, stop opening the valve. Once the rotation speed has stabilized, fully open the inlet Y-shaped stop valve of the turbine. The operator controls the flow rate through the flow control valve until it meets the process requirements, while simultaneously reducing the flow control valve for the hot high-pressure section. External ( ) – In case of the following situations, immediately report to superiors and shut down the turbine as appropriate: ( ) – Abnormal leakage ； ( ) – Abnormal vibration ； ( ) – Sparks ； ( ) – Flue gas. After starting the turbine, conduct verification and adjustment: 1) Verification and adjustment of the turbine – Externally ( ) – Check in conjunction with the driven equipment to ensure that the turbine’s vibration is within normal limits, and that the shaft displacement is also within the normal range. Outside/Inside ( ) – Confirm that the bearing temperature is normal. Outside ( ) – Ensure that the lubrication oil in the front and rear bearing housings flows smoothly. Outside ( ) – Verify that there is no leakage of lubricant. Outside ( ) – Verify that the shaft seal has no leaks. Outside ( ) – Verify that there are no leaks at the flanges and gaskets before and after the thermal high-pressure hydraulic control valve. Outside ( ) – Confirm that the turbine cooling water system is operating properly. Internal ( ) – Verify whether the vibration and temperature values at various measurement points of the indoor turbine are within the normal range. Inner ( ) – Confirm that interlocking is functioning properly. 2) Verification and adjustment of the process system External ( ) – Verify that the turbine inlet pressure is stable. Internal/External ( ) – Verify that the turbine outlet pressure is within the rated range. 3) Final confirmation of preparation work: Tech ( ) – Confirm that the turbine inlet valve is fully open. Tech ( ) – Confirm that the turbine outlet valve is open. Tech ( ) – Confirm that the drain valve of the turbine is closed. Tech ( ) – Confirm that the warm turbine line valve of the turbine is closed. Tech ( ) – Confirm that the valve on the turbine outlet oil cleaning line is closed. Tech ( ) – Verify that the turbine outlet pressure is within the rated range. Technique ( ) – Verify by contacting the equipment to check whether the bearing and seal temperatures are within the normal range. Skill ( ) – Verify that there are no leaks at the dynamic and static sealing points. 8.8.1 Shutdown operation of the hydraulic turbine
1) Preparation and verification prior to shutting down the turbine
External ( ) – Verify that the turbine inlet valve is fully open. External ( ) – Confirm that the turbine outlet valve is open. Outside ( ) – Confirm that the drain valve of the turbine is closed. Outside ( ) – Confirm that the warm turbine line valve of the turbine is closed. Outside ( ) – Confirm that the turbine outlet decontamination oil line valve is closed. Outside ( ) – Confirm that the turbine outlet pressure is within normal limits. Outside ( ) – Verify that there are no leaks at the dynamic and static sealing points. 2) Stop the turbine – slowly close the turbine inlet flow control valve, while opening the hot high-pressure liquid level control valve to regulate the level of hot high-pressure liquid. Inner – Close the inlet isolation valve. (If hot standby is required, do not close the inlet isolation valve.) Outside – Close the inlet Y-shaped stop valve. (Turbine inlet) Outside – Unless it is for maintenance, the outlet manual valve should not be closed after the turbine is stopped to prevent backpressure. 3) Hot standby a) Warm turbine External/Internal ( ) – Confirm that the turbine inlet isolation valve is open. Outside – Slightly open the turbine preheater manual valve. Outside – After parking, contact the blacksmith to turn the shaft once every half hour to ensure it moves smoothly without any sticking, thereby preventing shaft deformation due to uneven heating. b) Turbine system inspection outside ( ) – Verify that the turbine is not spinning on its own. Outside ( ) – Ensure that the lubrication oil in the front and rear bearing housings flows smoothly. Outside/Inside ( ) – Confirm that the turbine seal oil pressure is normal. Outside ( ) – Confirm that the cooling water system of the turbine seal oil cooler is operating properly. Outside ( ) – Verify that the circulating cooling water system for the turbine base is unobstructed. Outside ( ) – Verify that the sealing purge steam and the end cover quench steam are operating properly. 8.8.2 Turbine out of service for maintenance 1) Isolation of the turbine Outside ( ) – Verify that the Y-type stop valve at the turbine inlet is closed. (Turbine inlet) Outside/Inside ( ) – Confirm that the turbine inlet isolation valve is closed. Outside ( ) – Confirm that the turbine preheater manual valve is closed. Outside – Shut off the sealing purge steam and the end cover quenching steam. Outside – Close the twin valves at the turbine outlet. Outside – Close the manual valve upstream of the turbine outlet safety valve. Outside – Slowly close the main lubricating oil supply valves at both the upstream and downstream ends of the turbine. Outside – Close the main lubricating oil return valves at both the inlet and outlet ends of the turbine. Outside – Close the cooling water supply valve and return valve for the turbine housing and seal oil cooler. Outside – If it is confirmed that the inlet and outlet valves do not close properly, contact maintenance to install blind flanges for isolation. 2) Turbine venting outside ( ) – Verify that the drain line from the turbine outlet to the underground sludge tank is unobstructed. Outside ( ) – When the liquid level in the sludge tank is high, contact the tank farm to have the sludge transported outside the facility. Outside/Inside ( ) – Confirm that the turbine body temperature is below 120°C. Outside – Open the turbine casing to the sealed sludge line valve. Outside – Open the valve from the turbine outlet to the sealed sludge line. Outside ( ) – Confirm that the liquid inside the turbine has been completely drained. Outside – Close the valves of the turbine casing and the outlet sludge discharge line. Outside – Open the seal oil low-point drain valves at both the upstream and downstream ends of the turbine, then close them after pressure is released. 3) Final confirmation before stopping the turbine: Tech ( ) – Confirm that the turbine has been completely isolated from the system. Tech ( ) – Confirm that the lubrication system is isolated. Tech ( ) – Confirm that the cooling water system is stopped. Tech ( ) – Confirm that the inlet and outlet valves of the turbine are closed. Tech ( ) – Confirm that the turbine has been emptied, and that the drain valve is closed. Tech ( ) – Confirm that the hydraulic turbine is in condition for maintenance.

The procedures upstairs do not include the step of warming up the turbine at low speeds; instead, after operating the hydraulic turbine at 1500–1600 rpm for 5–10 minutes, the control valves for regulating the high-pressure liquid level and those related to the turbine are set to automatic control

Yes, without this part, there is a process involved in accelerating the engine after warming it up