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Technical information
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For customized configurations |
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| Limitations | Capacity | up to 30 t/h |
| Pressure in receiver | Determined based on the Questionnaire information | |
| Backpressure in condensate line | up to 20 barg | |
| Connection to the electricity grid | Determined based on the Questionnaire information | |
Materials
| For customized configurations | |
| Pump | Determined based on the Questionnaire information |
| Control valve | |
| Stop valves, strainers and filters | |
| Check valves | |
| Ball valves | |
| Receiver | Carbon steel* |
| Receiver, condensate pipelines | Carbon steel* |
| Frame | Carbon steel* |
* By default. Other materials can be quoted in “Other requirements” section of the Questionnaire.
Control system
- Control of the condensate level in the receiver using a control valve in accordance with the level gauge readings.
- If configuration PMTe-..-VFD has been selected: control of condensate pressure at the upstream side of the control valve (or pressure drop at the control valve) in accordance with the pressure gauge readings by changing the pump speed.
- If configuration PMTe-..- VFD has been selected: pump operation control with error alarms generation.
- General alarm (dry contact) and optional configurable digital output.
- Digital input for remote on/off switching of the unit.
- On request: digital interface for connection with the top level of the Computerized Process Control System (CPCS) (Profinet, Modbus, Profibus).
Dimensions and weight of customized configurations
Custom-shaped for each order based on the information provided in the Questionnaire. For more information, contact Steam Control Engineering, LLC (OOO).
Selection and installation details
| A proper condensate recovery unit design is to be made in accordance with local regulations prior to a condensate recovery unit installation. All necessary additional pipeline ancillaries, safety and control devices are to be included in order to ensure safe and long-term operation of equipment. |
| PMTe is installed for an active condensate drain from individual heat exchangers, in the event when steam pressure is insufficient for draining condensate out of the heat-transfer space through pressure drop. The top point of the receiver must be connected to the steam delivery line downstream of the control valve (the so-called balance line). At the top of the balance line a thermostatic air vent must be installed for self-draining of media, e.g. for discharge of non-condensed gases at starts, etc.
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| The condensate outlet fitting pipe of the heat exchanger must be positioned above the receiver plane, for self-drainage of condensate into the receiver. Therefore, the height at which the equipment is installed is determined by Hfp at which the condensate outlet fitting pipe is installed. Obviously, this height must be greater than the height of the receiver Hr. The required minimum height at which the receiver must be installed (Hr) is each time as applicable. If the temperature of fluid in the receiver is close to saturation temperature, the height of the support Hs must be at least 1.5 m to provide the required support at the pump inlet.
Therefore, if the active condensate drain unit installation is proactively planned (i.e., at the design stage), an appropriate height of the steam-using equipment must be provided for. For additional information, please contact “Steam Control Engineering”, LLC (OOO). |
| In units with a frequency converter, the control system maintains constant condensate pressure upstream of the control valve by changing the pump speed. However, the control system is supplied with an additional analogue input to connect an additional pressure gauge to the control valve. If the second gauge is used, the unit control system will maintain a constant pressure drop at the control valve (not just constant pressure upstream of the valve), which will improve the control and reduce the risk of cavitation on the valve seat. Such scheme is recommended for conditions with wide range of backpressure fluctuations in the condensate line over time.
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| To provide minimal pump flow and prevent water boiling on the pump blades, the unit is provided with a bypass line with an installed balancing valve.
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