High-pressure plunger pump, and use of a high-pressure plunger pump

A high pressure plunger pump comprising:

• a valve housing with at least one high-pressure line and at least one low-pressure line;
• at least one plunger arrangement with a working chamber and a plunger arranged to move axially back and forth in the working chamber,
• at least one first control valve and at least one second control valve, which are connected to the valve housing, wherein the high-pressure line is connected to the working chamber in a sealable manner by the at least one first control valve and the low-pressure line is connected to the working chamber in a sealable manner by the at least one second control valve, wherein the valve housing has a high-pressure connection that opens into the high-pressure line;
• a control unit configured to actuate the at least one first control valve and the at least one second control valve in such a way that a fluid supplied via the high-pressure connection of the valve housing and is under high pressure is suppliable to the working chamber when the at least one first control valve is open and is dischargeable via a low-pressure connection of the at least one second control valve after the at least one plunger is driven;
• and
• a generator coupled to the at least one plunger via a first driveshaft.

A method for operating a high pressure plunger pump comprising a valve housing with at least one high-pressure line and at least one low-pressure line, at least one plunger arrangement with a working chamber and a plunger arranged to move axially back and forth in the working chamber, at least one first control valve and at least one second control valve, which are connected to the valve housing, wherein the high-pressure line is connected to the working chamber in a sealable manner by the at least one first control valve and the low-pressure line is connected to the working chamber in a sealable manner by the at least one second control valve, wherein the valve housing has a high-pressure connection that opens into the high-pressure line, a control unit configured to actuate the at least one first control valve and the at least one second control valve in such a way that a fluid supplied via the high-pressure connection of the valve housing and is under high pressure is suppliable to the working chamber when the at least one first control valve is open and is dischargeable via a low-pressure connection of the at least one second control valve after the at least one plunger is driven, the method comprising:

• supplying, by the high-pressure plunger pump in a pumping operation, a fluid at a predetermined high pressure to a process assembly, wherein the at least one first and second control valves are controlled via the control unit such that the at least one plunger is driven by a motor-driven driveshaft;
• and
• supplying, by the high-pressure plunger pump in a motor operation of the high-pressure pump, the fluid at the predetermined high pressure via the high-pressure line and controlling, by the control unit, the at least one first and second control valves in such a way that the motor-driven driveshaft is driven by the at least one plunger, wherein the motor-driven driveshaft is coupled to a generator to generate electricity.

A method for operating a high pressure plunger pump comprising a valve housing with at least one high-pressure line and at least one low-pressure line, at least one plunger arrangement with a working chamber and a plunger arranged to move axially back and forth in the working chamber, at least one first control valve and at least one second control valve, which are connected to the valve housing, wherein the high-pressure line is connected to the working chamber in a sealable manner by the at least one first control valve and the low-pressure line is connected to the working chamber in a sealable manner by the at least one second control valve, wherein the valve housing has a high-pressure connection that opens into the high-pressure line, a control unit configured to actuate the at least one first control valve and the at least one second control valve in such a way that a fluid supplied via the high-pressure connection of the valve housing and is under high pressure is suppliable to the working chamber when the at least one first control valve is open and is dischargeable via a low-pressure connection of the at least one second control valve after the at least one plunger is driven, the method comprising:

• supplying, by the high-pressure plunger pump, the fluid at a high pressure predetermined by the hydraulic process structure via the high-pressure line and controlling, by the control unit, the at least one first and second control valves in such a way that a driveshaft is driven by the at least one plunger, wherein the driveshaft is coupled to a generator to generate electricity.