1.0.1 This code was formulated with a view to making fossil fired power plant (hereinafter referred to as "power plant") meet the design requirements on safety and reliability, advanced technology, economy and suitability, energy conservation and environmental protection.
1.0.2 This code is applicable to the design of such constructed, extended and renovated fossil fired power plants with parameters at or below high pressure and high temperature, power per unit less than 125MW, adopting the direct combustion mode and mainly combusting solid fossil fuel.
1.0.3 In addition to the requirements stipulated in this code, the design of small fossil fired power plant also shall comply with those in the current relevant ones of the nation.
2 Terms
2.0.1 Thermalization coefficient
The ratio of the rated heating load (deducting the self-use steam heat load) of heat supply unit to the maximum design heating load.
2.0.2 Simultaneity factor
The ratio of the regional (enterprise) maximum heating load to the sum of maximum heating load of all users (workshops).
2.0.3 Micro filtration
A kind of membrane separation technique, with filtration precision of 0.1 μm~1.0 μm.
2.0.4 Ultra filtration
A kind of membrane separation technique, with filtration precision of 0.01 μm~0.1 μm.
2.0.5 On line UPS
An uninterruptible power supply unit having such function that whether the AC working power supply is normal or not, the inverter is always in working state and is able to guarantee the uninterruptible power supply for loads through the inversion of DC power supply and output AC sine wave.
2.0.6 Electrical control and management system
A computer system performing control and management over such electrical equipment as generator transformer bank and high and low voltage auxiliary power supply of power plant by adopting open or distributed network structure on basis of the fieldbus technology, which is also referred to as ECMS.
2.0.7 Network computerized control system
A computer system performing control and management over the power network system or equipment of booster station by adopting open or distributed network structure on basis of the fieldbus technology, which is also referred to as NCCS.
2.0.8 Operator station
A man-machine interface equipment installed at the control room in control system and used for operator to conduct monitoring and controlling.
2.0.9 Parallel change-over
The change-over with the commands on the tripping of high-voltage working power supply circuit breaker and the switching in of standby power supply circuit breaker of the power plant being given simultaneously.
2.0.10 High speed change-over
The auxiliary power change-over for power plant with change-over time no larger than 100 ms when high voltage auxiliary power is in accident.
2.0.11 Engineer station
A man-machine interface equipment installed at the control room or other places in the control system and used for programming and configuration personnel to conduct logic, picture and parameter modification.
2.0.12 Air cooled heat exchangers
A kind of heat dissipation equipment cooling down the circulating water of indirect air cooling system by using air as cooling medium.
2.0.13 Air cooled condensers
A kind of heat dissipation equipment making the steam exhausted from steam turbine condense to water by using air as cooling medium.
2.0.14 Drought exponent
The ratio of the annual evaporation capacity and annual rainfall at a region.
2.0.15 Severe cold region
The region where the mean temperature of normal coldest month (i.e. the winter ventilation outdoor calculated temperature) is not higher than -10℃.
2.0.16 Cold region
The region where the mean temperature of normal coldest month (i.e. the winter ventilation outdoor calculated temperature) is not higher than 0℃ but higher than -10℃.
1 General Provisions
2 Terms
3 Basic Requirements
4 Heating (Cooling) Electrical Loads
4.1 Heating (Cooling) Electrical Loads and Heating (Cooling) Medium
4.2 Electrical Loads
5 Site Selection
6 Overall Planning
6.1 General Requirements
6.2 Internal Planning of Plant Area
6.3 External Planning of Plant Area
7 Layout of Main Plant Building
7.1 General Requirements
7.2 Layout of Main Plant Building
7.3 Overhaul Facilities
7.4 Comprehensive Facilities
8 Coal Handling System
8.1 General Requirements
8.2 Coal Unloading Facilities and External Transportation
8.3 Belt Conveyor System
8.4 Coal Storage Yard and Its Equipment
8.5 Coal Screening and Crushing Equipment
8.6 Storage and Preparation of Limestone
8.7 Control Mode
8.8 Auxiliary Facilities and Buildings for Coal Handling
9 Boiler Equipment and System
9.1 Boiler Equipment
9.2 Pulverized Coal Preparation
9.3 Air and Flue Gas System
9.4 Oil System for Ignition and Combustion Support
9.5 Auxiliary System and Equipment of Boiler
9.6 Startup Boiler
10 Ash and Slag Handling System
10.1 General Requirements
10.2 Hydraulic Ash and Slag Handling System
10.3 Mechanical Slag Handling System
10.4 Dry Ash Handling System
10.5 Ash and Slag Off-site Transportation System
10.6 Control and Overhaul Facilities
10.7 Ash and Slag Handling System of Circulating Fluidized Bed Boiler
11 Desulfurization System
12 Denitration System
13 Steam Turbine Equipment and System
13.1 Steam Turbine Equipment
13.2 Main Steam and Heat Supply Steam System
13.3 Water Supply System and Supply Pump
13.4 Deaerator and Water Supply Tank
13.5 Condensate System and Condensate Pump
13.6 Drain pump of Low Pressure Calorifier
13.7 Drain Flash Tank, Drain Tank, Drain pump, Low Flush Tank and Low Level Pump
13.8 Industrial Water System
13.9 Heating Network Calorifier and Its System
13.10 Temperature and Pressure Reducing Device
13.11 Condensed Water Recovery Plant of Steam Heat Supply Network
13.12 Steam Condenser and Its Auxiliary Facilities
14 Water Treatment Equipment and System
14.1 Water Pretreatment
14.2 Water Pre-desalination
14.3 Boiler Makeup Water Treatment
14.4 Chemical Dosing and Water and Steam Sampling for Thermal System
14.5 Cooling Water Treatment
14.6 Treatment for Makeup Water and Production Return Water of Heating Network
14.7 Chemical Storage and Solution Tank
14.8 Design and Corrosion Protection of Tanks, Grooves, Pipelines and Valves
14.9 Laboratory and Instruments
15 Information System
15.1 General Requirements
15.2 Overall Planning of Plant Information System
15.3 Management Information System (MIS)
15.4 Quotation system
15.5 Video Monitoring System
15.6 Access Guard Management System
15.7 Wiring
15.8 Information Security
16 Instrumentation and Control
16.1 General Requirements
16.2 Control Mode and Automation Level
16.3 Layout of Control Room and Electronic Equipment Room
16.4 Measurement and Instrument
16.5 Analog Quantity Control
16.6 Switching Value Control and Interlocking
16.7 Alarming
16.8 Protection
16.9 Control System
16.10 Control Power Supply
16.11 Layout of Cables, Instrument Tubes and Local Equipment
16.12 Instrument and Control Laboratory
17 Electrical Equipment and System
17.1 Generator and Main Transformer
17.2 Main Electrical Connection
17.3 AC Auxiliary Power System
17.4 High-voltage Distribution Device
17.5 DC Power Supply System and AC Uninterruptible Power Supply
17.6 Electrical Monitoring and Control
17.7 Electrical Measuring Instrument
17.8 Component Relay Protection and Automatic Safety Device
17.9 Lighting System
17.10 Cable Selection and Laying
17.11 Overvoltage Protection and Earthing
17.12 Electrical Laboratory
17.13 Electrical Device in Hazardous Explosion and Fire Environment
17.14 In-plant Communication
17.15 System Protection
17.16 System Communication
17.17 Telecontrol of System
17.18 Electric Energy Metering
18 Hydraulic Facilities and Systems
18.1 Water Source and Water Management
18.2 Water Supply System
18.3 Water Intake Structure and Water Pump House
18.4 Water Transport and Distribution Pipeline and Ditch
18.5 Cooling Facilities
18.6 External Ash and Slag Handling System and Ash Storage Yard
18.7 Water Supply and Drainage
18.8 Hydraulic Buildings (Structures)
19 Auxiliary and Ancillary Facilities
20 Buildings and Structures
20.1 General Requirements
20.2 Seismic Design
20.3 Main Mill Building Structure
20.4 Base and Foundation
20.5 Lighting and Natural Ventilation
20.6 Thermal Engineering and Noise Control of Building
20.7 Waterproof and Drainage
20.8 Interior and Exterior Decoration
20.9 Doors and Windows
20.10 Living Facilities
20.11 Chimney
20.12 Coal Handling Structures
20.13 Supporting Structure of Air Cooled Condenser
20.14 Live Loads
21 Heating, Ventilation and Air Conditioning
21.1 General Requirements
21.2 Main Plant Building
21.3 Electrical Building and Electrical Equipment
21.4 Coal Handling Building
21.5 Chemical Building
21.6 Other Auxiliary and Ancillary Buildings
21.7 Plant Cooling and Heating Stations and Pipe Network
22 Environmental Protection and Water and Soil Conservation
22.1 General Requirements
22.2 Design Requirements for Environmental Protection and Water and Soil Conservation
22.3 Prevention and Control Principles for Various Pollution Sources
22.4 Environmental Management and Monitoring
22.5 Water and Soil Conservation
23 Labour Safety and Occupational Health
23.1 General Requirements
23.2 Labour Safety
23.3 Occupational Health
24 Fire Fighting
Appendix A Complete Water Quality Analysis Report
Explanation of Wording in This Code
List of Quoted Standards
