TECHNICAL PROPOSAL DOCUMENTATIONTHE WASTE HEAT RECOVERY POWER GENERATION PROJECT (15MW)
1. Working scope
1) Turbine & generator department;
2) AQC Boiler;
3) P.H. Boiler;
4) Demineralized water department;
5) Water circulating pump station, cooling tower;
6) Outdoor steam & water pipeline;
7) Power supply and distribution, control;
8) Power station water supply and sewerage system;
2. Installed solution
2.1 Waste gas source
The waste heat source of the 2400+3000t/d clinker production line is mainly from the cooler and the preheater.
2.1.1 2400 Kiln
Average cooler waste gas parameter: 125,000Nm3/h-300 Celsius Degree(Estimated) Preheater waste gas parameter: 192,000Nm3/h-380 Celsius Degree The waste gas of the cooler should be exhausted from the middle stage. After reformation, the waste gas parameter at the middle stage will be
80,000Nm3/h-400 Celsius Degree.
2.1.2 3000 Kiln
Average cooler waste gas parameter: 156,000Nm3/h-372 Celsius Degree(Estimated) Preheater waste gas parameter:271,000Nm3/h-350 Celsius Degree The waste gas of the cooler should be exhausted from the middle stage. After reformation, the waste gas parameter at the middle stage will be 140,000Nm3/h-400 Celsius Degree.
2.2 Thermodynamic system and parameter determination
1) AQC1 boiler
AQC1 boiler produces 8.5t/h-1.0MPa-380 Celsius Degree superheated steam.
2) PH1 boiler
PH1 boiler will produce 21.4t/h-1.0MPa-360 Celsius Degree superheated steam
3) AQC2 boiler
AQC2 boiler produces 15t/h-1.0MPa-380 Celsius Degree superheated steam.
4) PH2 boiler
PH2 boiler will produce 25.6t/h-1.0MPa-320 Celsius Degree superheated steam
5) Turbine
Steam turbine with the main steam parameter of 1.0MPa-345 Celsius Degree. The total input steam amounts for turbine is 70.5t/h, calculated power generation reach 13100kW Water jet air ejector is selected as vacuum system of turbine; 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:
One15MW turbine/generator set+ two AQC boiler+ two PH boiler
Condensing water of the turbine is pumped to AQC boiler as supply of the hot water stage, outgoing water of the stage is used as feed water of AQC steam stage I and PH boiler. Superheated steam produced in AQC steam stage I and PH boiler merges together and is introduced to a 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. Please refer to attached drawings �?F02 THERMODYNAMIC SYSTEM DIAGRAM�?
2.4 Circulating water system
Circulating water system including water circulating pump, cooling tower, a circulating water pond and pipe network will be adopted for equipment cooling. When the system in operation, cooling water will be pumped from water pond to production equipments in each department, the water after equipment cooling will be delivered to the structures by
remained pressure of the circulating pump, and then the water is returned to water pond for circulation. By-pass filter are placed in order to ensure fine and stable operation of the system. Three cooling towers with capacity of 1,500m3/h per unit will be selected.
2.5 Water source
Annual water consumption will be 900,000m3/a, and daily average water consumption will be 3,000m3/d, thus the capacity of water source should be 3,600m3/d.
2.6 Main Equipment
No. |
Equipment name |
Quantity. |
Specification |
1 |
AQC1 boiler |
1 |
Waste gas: 80,000Nm3/h-400 Celsius Degree Outlet gas temperature:85 Celsius Degree Leakage:2% Steam: |
|
|
|
8.5t/h-1.0MPa-380 Celsius Degree Feed water temperature: 42 Celsius Degree |
2 |
Pre. |
1 |
Inlet gas: |
|
Chamber1 |
|
80,000Nm3/h-400~450 Celsius Degree |
|
|
|
Leakage:0.5% |
3 |
PH1 boiler |
1 |
Inlet gas: 192,000Nm3/h-380 Celsius Degree Outlet gas temperature: 175 Celsius Degree Leakage: 3% Steam: |
|
|
|
21.4t/h-1.0MPa-360 Celsius Degree Feed water temperature:110 Celsius Degree |
4 |
AQC2 boiler |
1 |
Waste gas: 140,000Nm3/h-400 Celsius Degree Outlet gas temperature:85 Celsius Degree Leakage:2% Steam: |
|
|
|
15t/h-1.0MPa-380 Celsius Degree Feed water temperature: 42 Celsius Degree |
5 |
Pre. |
1 |
Inlet gas: |
|
Chamber1 |
|
140,000Nm3/h-400~450 Celsius Degree |
No. |
Equipment name |
Quantity |
Specification |
1 |
AQC1 boiler |
1 |
Waste gas: 80,000Nm3/h-400 Celsius Degree Outlet gas temperature:85 Celsius Degree Leakage:2% Steam: |
|
|
|
8.5t/h-1.0MPa-380 Celsius Degree Feed water temperature: 42 Celsius Degree |
2 |
Pre. |
1 |
Inlet gas: |
|
Chamber1 |
|
80,000Nm3/h-400~450 Celsius Degree |
|
|
|
Leakage:0.5% |
3 |
PH1 boiler |
1 |
Inlet gas: 192,000Nm3/h-380 Celsius Degree Outlet gas temperature: 175 Celsius Degree Leakage: 3% Steam: |
|
|
|
21.4t/h-1.0MPa-360 Celsius Degree Feed water temperature:110 Celsius Degree |
4 |
AQC2 boiler |
1 |
Waste gas: 140,000Nm3/h-400 Celsius Degree Outlet gas temperature:85 Celsius Degree Leakage:2% Steam: |
|
|
|
15t/h-1.0MPa-380 Celsius Degree Feed water temperature: 42 Celsius Degree |
5 |
Pre. |
1 |
Inlet gas: |
|
Chamber1 |
|
140,000Nm3/h-400~450 Celsius Degree |
No. |
Equipment name |
Quantity |
Specification |
|
|
|
Leakage:0.5% |
6 |
PH2 boiler |
1 |
Inlet gas: 271,000Nm3/h-350 Celsius Degree Outlet gas temperature: 185 Celsius Degree Leakage: 3% Steam: |
|
|
|
25.6t/h-1.0MPa-320 Celsius Degree Feed water temperature:150 Celsius Degree |
7 |
Condensing steam turbine |
1 |
Rated power: 15MW |
|
|
|
Rated speed of rotation: 3000r/min |
|
|
Main steam pressure: 0.9MPa |
|
|
Main steam temperature: 345 Celsius Degree |
|
|
Exhaust pressure: 0.008MPa |
8 |
Generator |
1 |
Rated power: 15MW |
|
|
|
Rated Speed of rotation: 3000r/min |
|
|
Efficiency:97.5% |
9 |
Condensate pump |
2 |
Flow: 70~100m3/h |
|
|
|
Lift: 40~37.7m |
10 |
Feed water pump |
2 |
Flow:50~75m3/h |
|
|
|
Lift: 313~264m |
11 |
Water circulating pump |
3 |
Flow: 1440�?872�?232 m3/h |
|
|
|
Lift: 31�?7�?2m |
12 |
Mechanical ventilation fibre-glass cooling tower |
3 |
Capacity:1,500 t/h
Water temp. difference: 10 Celsius Degree |
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 plane, 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 plane.
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 plane.
3.2 AQC boiler
The AQC boilers and the dedusting 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 7.0×7.0 area. Boiler main body will be arranged on 9.000 plane, takes 10.7×5.35m 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 10×10m area for each. The boiler main body will be arranged on 18.000 plane, sampler, continuous flashing container and dosing device will be installed in ±0.000 plane.
3.4 Water circulating pump and cooling tower
Cooling towers, water circulating pump, bypass filter and dosing device will be arranged in the pump station, which will takes 27×15m area.
4. MAIN TECHNICAL ECONOMY INDEXES
No. |
Technical Designation |
Unit |
Indexes |
Remarks |
1 |
Installed capacity |
kW |
15,000 |
|
2 |
Average generation power |
kW |
13,200 |
|
3 |
Average operating hour |
h |
7,200 |
|
4 |
Average power self-consumption |
% |
6.8 |
|
5 |
Annual power generation |
kWh |
9,5040,000 |
|
6 |
Labor quota |
person |
16 |
|
|