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For customized configurations |
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| Limitations | capacity |
up to 10 t/h of deaerated water |
| deaerator pressure |
up to 0,5 barg |
|
| inlet steam pressure |
up to 12,8 barg |
|
| Inlet water pressure |
Up to 6 barg |
|
| performance parameters | pressure |
0,2 barg |
| temperature |
104*С |
|
| Rated inlet pressure | steam |
2,5-3,5 barg* |
| water |
2,0-3,0 barg |
|
| Connection to the electricity grid | 230В 50Гц (10А). Safety device with appropriated rated parameters must protect the control cabinet. | |
| Compressed air | 6,0-9,0 barg, free of dust, moisture and oil (in compliance to ISO 8573-1) | |
| Feedwater | Water prepared in accordance with the water preparation standards for steam boilers | |
* — For steam pressure above 6 barg, it is recommended to use a steam pressure reducing unit, e.g. PR.
Materials
|
For customized configurations |
|
| Head |
Stainless steel* |
| Reservoir tank |
Carbon steel* |
| Stop valves, strainers and filters, steam traps |
Cast iron |
| Check valves |
Stainless steel |
| Safety valves |
Cast iron |
| Control valves, pressure reducing valves |
Cast iron |
| Solenoid valves |
Brass |
| Feedwater pipelines |
Carbon steel* |
| Condensate pipelines |
Carbon steel* |
| Steam pipelines |
Carbon steel* |
| Frame |
Carbon steel* |
* By default. Other materials can be quoted in “Other requirements” section of the Questionnaire.
- The “ON/OFF” tank level control when SL valve is used or the smooth control when control valve with pneumatic or electric actuator (EL, PN) is used.
- Pressure control in the steam space when control valve with pneumatic or electric actuator (EL, PN) is used.
- Circulation pump control for configurations DEAR-.. /ASC.
- Temperature control of chemically treated water for configurations DEAR-../HTGi or DEAR-../SIHi.
- General alarm (dry contact) and optional configurable digital output (e.g., when low emergency level is reached).
- 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)
| A proper deaerator design is to be made in accordance with local regulations prior to a deaerator 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. |
| Configuration of a deaeration unit to a great extent depends on the depends on how condensate and chemically treated water are supplied to the head, as well as on the condensate return rate. Alternatively, returning condensate can be mixed with chemically treated water in a common condensate collection tank installed in a boiler house and fed into the head after mixing as one stream. Optionally, a configuration can be chosen where condensate and chemically treated water are fed separately into the head. |
| Regardless of the type of condensate and chemically treated water supply in the head, it is desirable that the temperature of each flow is between 70 and 90 *С. Accordingly to this requirement an optimal configuration is selected, and the relevance of using HTGi or SIHi for preheating. |
| OftenFSS units in the boiler house are used as continuous blowdown expanders, and the separated low-grade steam can be recovered by feeding it as a separate flow to the deaerator blanket of steam. At the same time, the fluid phase heat can be used to preheat chemically treated water fed into the deaerator. If the continuous purge heat recovery system is to be implemented, it is recommended to select the DEAR unit configuration with a smooth level control (PN or EL options) to ensure a virtually constant flow of treated water and, accordingly, a better overall recovery capacity. Also, if there is an “on/off” level control in the deaerators, an optional installation of a system of purge heat and steam recovery system contains a feedtank for collection of the recovered heat. For more information, contact Steam Control Engineering, LLC (OOO). |
