1. Working scope
1) Turbine & generator department,
2) Air cooled condenser
3) AQC Boiler,
4) P.H. Boiler,
5) Demineralized water department,
6) Auxiliary cooling water system,
7) Outdoor steam & water pipeline,
8) Power supply and distribution, control,
9) Power station water supply and sewerage system,
2. Installed solution
2.1 Waste gas source
The waste heat source of the clinker production line is from the coolers and the preheaters.
Existing waste heat source:
Cooler exit waste gas parameter: 250,000Nm3/h-400°C
Preheater waste gas parameter:
PH-K: 164,500m3/h-290°C
PH-C: 164,500m3/h-290°C
2.2 Thermodynamic system and parameter determination
AQC boiler
AQC boiler produces
HP steam: 34.53t/h-2.4MPa-360°C superheated
LP steam: 4.46 t/h-0.35MPa-165°C superheated
Hot water: 13.4t/h-105°C as feed water of PH boiler
1) PH1 boiler
PH boiler produces
HP steam: 6.5t/h-2.6MPa-226°C saturated.
2) PH2 boiler
PH boiler produces
HP steam: 6.5t/h-2.6MPa-226°C saturated.
3) Steam Turbine
Steam turbine with the steam parameter :
HP: 2.3MPa-355°C
LP: 4.46t/h-0.3MPa-148°C
Condensing Pressure: 0.022MPa
The gross power generation is 6,697kW .
Water jet air ejector is selected as vacuum system for condenser,
DEH adjustment system is selected to make the parameter of steam stable.
2.3 Installed capacity and thermodynamic system
To sum up, the thermodynamic system and installed solution are determined as follows:
7.5MW turbine/generator set+ one AQC boilers+ two PH boilers
Exhausted steam from turbine shall be condensate in air cooled condenser, condensate water is pumped to AQC boiler as supply of the water heater, outgoing water is introduced into deaerator to remove oxygen, after that, the feed water pump shall pump the water to LP steam generator, HP steam generator of AQC boiler and PH1&2 boiler. PH1&2 boiler will produce saturated steam and to be superheated by AQC superheater. AQC boiler produce superheated HP steam, and LP steam. Two parameter steam will be introduced into steam turbine for power generation. Exhaust steam of turbine after work condenses to water, and is pumped to the AQC boiler, thus a complete thermodynamic circulation system forms.
2.4 Condensing system
Air cooled condenser will be selected to condensate the exhaust steam from turbine. Condensing pressure is 0.022MPa at ambient temp. 45deg.C
2.5 Auxiliary cooling water system
Water cooling system shall be selected for other equipment cooling, such as air cooler of generator, turbine oil cooler, etc.
2.6 Main Equipment selection
|
No. |
Equipment name |
Q’ty. |
specification |
|
1 |
AQC boiler |
1 |
Waste gas:
250,000Nm3/h-400°C
Outlet gas temperature:130°C
Leakage ratio:2%
Steam output:
HP steam: 34.53t/h-2.4MPa-360°C superheated
LP steam: 4.46 t/h-0.35MPa-165°C superheated
Hot water: 13.4t/h-105°C
PH boiler Feed water temperature: 62°C |
|
2 |
Preduster
Chamber |
1 |
Inlet gas:
250,000Nm3/h-400°C
Leakage ratio:0.5% |
|
3 |
PH1 boiler
PH2 boiler
|
2 |
Inlet gas:
164,500m3/h-290°C
Outlet gas temperature: 226°C
Leak-in ratio: 3%
Steam output:
HP steam: 6.5t/h-2.6MPa-226°C saturated.
Feedwater temperature:100°C |
|
4 |
Condensing steam turbine |
1 |
Rated power: 7.5MW
HP steam pressure:2.3MPa
HP steam temperature: 355°C
Exhaust pressure: 0.022MPa |
|
5 |
Generator |
1 |
Rated power: 7.5MW
Efficiency:97% |
|
6 |
Condensate pump |
2 |
Flow: 36~68m3/h
Lift: 60~54m |
|
7 |
Feed water pump |
2 |
Flow:30~55m3/h
Lift: 389~322m |
|
8 |
Air cooled condenser |
1 |
|
3 Layout
3.1 Main building
The main building, integrates a turbine & generator room, high & low voltage distribution room, control center and chemical water treatment department.
The turbine and generator room takes 21×15m area, which is two story building. Auxiliary equipments including feed water pumps, condenser etc. will be installed in ±0.000 plane, operation level is in 7.500 plan, turbine and generator set will be installed in this plane.
High & low voltage distribution room and control center take 15×9m area, which will be arranged on the side of the turbine room. High & low voltage distribution room is in ±0.000 plane, and the control center is in 7.500 plan.
Chemical water treatment department will be arranged on the other side of the main building, takes 15×7.5m area. Clarified water tank and pure water tank will be arranged on the roof of the chemical water department 5.000 plan.
3.2 AQC boiler
The AQC1 boilers and the pre chamber will be arranged on the side of the kiln outlet cooler, which is open-arranged. The dedusting chamber will be arranged in the 4.500 plane, takes 5.5×5.5 m area. Boiler main body will be arranged on 6.000 plane, takes 8.6×3.4m area, the sampler will be installed on this plane. A continuous flashing container and dosing device will be in ±0.000 plane.
3.3 PH boilers
The PH boilers will be arranged beside the preheater, which is open-arranged, take 8×6m area for each. The boiler main body will be arranged on 12.000 plane, sampler, continuous flashing container and dosing device will be installed in ±0.000 plane.
4. MAIN TECHNICAL ECONOMY INDEXES
|
No. |
Technical Designation |
Unit |
Indexes |
Remarks |
|
1 |
Installed capacity |
kW |
7,500 |
|
|
2 |
Gross power generation |
kW |
6,700 |
|
|
3 |
Average power self-consumption |
% |
9 |
|
|
4 |
Operator |
person |
16 |
|
