There are two basic types of HPRT: Impulse (Pelton wheel) and reaction type.

Generally, pumps are a means of fluid transport that convert mechanical energy into hydraulic energy. Pumps increase fluid pressure and flow. When process conditions call for pressure to be dissipated, a pump running in reverse may be applied as a reaction turbine to capture that otherwise wasted energy (e.g. by throttling in a valve, dissipating the pressure energy into heat).

With many years of experience and expertise in this field, Sulzer is a leader in HPRT reaction technology with hundreds of installations.

A gas-scrubbing HPRT application can recover more than 2 MW
A gas-scrubbing HPRT application can recover more than 2 MW

The HPRT may be used to drive a pump, generator, compressor or other rotating machinery. Speed is governed by the inlet control valve, motor or generator and the electrical grid frequency. If required, a one-way clutch between a motor and the HPRT prevents the HPRT from robbing power from the train under low flow startup conditions. Due to high gas volume fraction carryover, experience strongly indicates that conservative speeds are prudent on Pump-Motor-HPRT trains in fertilizer plants.

Typical Hydraulic Turbine Installations

Split range liquid level controllers are typically used to regulate turbines. The controller adjusts the HPRT inlet valve or further open the bypass valve when the turbine is overpowered.
Overspeed trip devices are often furnished with hydraulic turbines. This device shuts the HPRT inlet valve and activates overspeed alarms when required.

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