1 General Provisions
1.0.1 With a view to making fossil fired power plant meet safety and reliability, advanced technology, economy and suitability requirements with regards to design, this code was formulated.
1.0.2 This code is applicable to design of fossil fired power plant engineering with initial steam parameter of ultra-high voltage or above and the single unit capability of 125MW or above, for which direct firing mode and main solid fossil fuel for combustion are adopted.
1.0.3 Design of fossil fired power plant shall take technical requirements defined in long-term power purchase contract or agreement from power grid, coal quality information specified in long-term fuel supply contract or agreement as well as basic information such as hydrology, meteorology and geology relative to the engineering as its basis.
1.0.4 Original information required for design of fossil fired power plant shall be real and reliable, and shall meet corresponding design demands.
1.0.5 Resource conditions in plant shall be fully and rationally utilized for design of fossil fired power plant and overall planning shall be carried out for this engineering and long-term engineering.
1.0.6 Advanced technology, process, materials and equipment proved through operation practice or industrial test shall be applied positively for design of fossil fired power plant.
1.0.7 Design life for process system of fossil fired power plant shall be designed into 30-year.
1.0.8 Uniform identification system in the plant should be adopted for design of fossil fired power plant.
1.0.9 Design of fossil fired power plant shall meet those specified in this code and current relevant national standards.
2 Terms
2.0.1 Identification system
It refers to such kind of code system that system, equipment and components in the power plant are defined according to characteristics such as function of identified object, process and installation position.
2.0.2 Power system
It refers to such an integral that is consisted of power generation, supply (transmission, transformation and distribution) and utilization facilities as well as relay protection required for normal working of electrical facility, automatic safety device, measuring device, power communication facilities and automation facilities.
2.0.3 Black start
It refers to such a process that certain power system after shutdown due to fault, drives other units without self-starting capacity in the system to gradually recover system operation, through start-up of units with self-starting capacity in the system.
2.0.4 Plant area
It refers to such an area that is enclosed by permanent land enclosure of production, auxiliary and ancillary facilities in fossil fired power plant.
2.0.5 Main power area
It refers to such an area that is enclosed by center line of circular road for facilities such as steam turbine house, deaerator room, coal bunker bay, boiler, deduster, chimney and desulfurizer.
2.0.6 Balance of cut and fill of earthwork in plant
It refers to that influencing factors such as cut, fill, remaining excavated earth of building and structure foundation, top soil, mud or construction waste that can't be backfilled in plant and closely related to plant area as well as cut loosening coefficient make amount of cut and fill in the plant finally approach a balance.
2.0.7 Source of danger and risk
It refers to source or state that may cause harm or disease, property loss, working environment destruction or their combination.
2.0.8 Overtopping
It refers to unit discharge of wave overtopping embankment and along direction of embankment length.
2.0.9 Permissive overtopping discharge
It refers to unit discharge permissible to overtop the embankment under design conditions.
2.0.10 Drought exponent
It refers to ratio of annual evaporation capacity and annual rainfall in certain region.
2.0.11 Flue gas discharged cooling tower
It refers to cooling tower that replaces flue gas after chimney discharge and desulfurization.
2.0.12 Seawater cooling tower
It refers to wet cooling tower with cooling medium of seawater.
2.0.13 Air cooled heat exchanger
It refers to heat exchanger with cooling medium of air that makes circulating water of indirect air-cooled system cooled.
2.0.14 Air cooled condenser
It refers to equipment with cooling medium of air that makes steam discharge of steam turbine directly cool and condense into water.
2.0.15 Electrodeionization
It refers to desalination technology that ion in water is eliminated through integrated approach to electro-dialysis and ion exchange phase and by utilization of electric energy.
2.0.16 Supervisory information system for plant level (SIS)
It refers to information monitoring and management system that collects real-time production process data of control systems in fossil fired power plant and comprehensively optimizes service for real-time production process in the plant with real-time/historical database of production process in the plant as its platform.
2.0.17 Real-time system
It refers to system that is able to identify and handle with discrete events within limited time and may dynamically reflect parameter variation of production process in fossil fired power plant in real time.
2.0.18 Central control room
It refers to locations for central control on two sets of units and auxiliary system or above in fossil fired power plant.
2.0.19 Unit control room
It refers to locations for progress control on boiler, steam turbine, generator and main auxiliary system or equipment of monoblock unit.
2.0.20 High voltage switchgear
It is a general term for 35KV switchgear or above in fossil fired power plant.
2.0.21 One-and-a-half breaker configuration
It refers to double bus cabling that, for double circuits, three breakers are connected in series and bridged between two groups of buses and two circuits are respectively connected to both ends of middle breaker
2.0.22 One-and-one-third breaker configuration
It refers to double bus cabling that, for three circuits, four breakers are connected in series and bridged between two groups of buses and three circuits are respectively connected to both ends and the center of two breakers in the middle.
2.0.23 Control with strong power source
It refers to control mode with nominal control voltage of 110V or above.
2.0.24 Supporting structure of air cooled condenser
It is the generic term for supporting air cooled condenser structure consisted of column, platform (including supporting beam or truss for fan, operating repair platform or boardwalk) and wind-break wall.
2.0.25 Circular closed coal yard
It refers to indoor circular coal storage yard with major diameter consisted of coal bulkhead and semispherical space truss.
3 Requirements of Power System on the Fossil Fired Power Plant
Contents
1 General Provisions
2 Terms
3 Requirements of Power System on the Fossil Fired Power Plant
3.1 Basic Requirements
3.2 Technical Requirements on the Connection of Power Plant to the Power System
3.3 Requirement on the Regulating Performance of the Generating Unit
3.4 Requirements on the Operating Capacity of the Generating Unit under Abnormal Conditions
4 Overall Planning
4.1 Basic Requirements
4.2 Off-site Planning
4.3 Plant Area Planning and General Arrangement
5 Unit Selection
5.1 Unit Parameters
5.2 Main Machine Selection
5.3 Capability Matching of Main Machine
5.4 Indices Calculation of Unit Design Performance
6 Arrangement of Main Power Area
6.1 Basic Requirements
6.2 Arrangement of Steam turbine House and Deaerator Bay
6.3 Arrangement of Coal Bunker Bay
6.4 Boiler Arrangement
6.5 Central control room and Electrical Facilities Room
6.6 Arrangement of Flue Gas Desulfurization Facilities
6.7 Arrangement of Flue Gas Denitration Facilities
6.8 Maintenance and Repair
6.9 Requirements on Comprehensive Facilities
7 Coal Handling System
7.1 Basic Requirements
7.2 Coal Unloading Facilities
7.3 Coal Storage Facilities
7.4 Belt Conveyor
7.5 Screening and Crushing Equipment
7.6 Coal Blending Facilities
7.7 Coal Handling System of CFB Boiler
7.8 Limestone Handling and Pulverizing System of CFB Boiler
7.9 Auxiliary Coal Handling Facilities
8 Boiler Equipment and System
8.1 Boiler Equipment
8.2 Coal Pulverizing System
8.3 Air and Gas System
8.4 Flue Gas De-dusting and Discharge System
8.5 Start-up System of Once-through Boiler
8.6 Ignition and Combustion Fuel System
8.7 Auxiliary Boiler System
8.8 Start-up Boiler
8.9 CFB Boiler System
9 Ash and Slag Handing Systems
9.1 Basic Requirements
9.2 De-slagging System
9.3 De-dusting System
9.4 Off-site Transportation System
9.5 Auxiliary Facilities
9.6 Air Storage Yard
10 Flue Gas Desulfurization System
10.1 Basic Requirements
10.2 Absorbent Processing System
10.3 Sulfur Dioxide Absorbing System
10.4 Flue Gas System
10.5 Desulfurization Byproduct Treatment System
11 Flue Gas Denitration System
11.1 Basic Requirements
11.2 Reductant Storage and Supply System
11.3 Flue Gas Denitration Reaction System
11.4 Ammonia/Air Mixing and Spraying System
12 Steam Turbine Equipment and System
12.1 Steam Turbine Equipment
12.2 Main Steam, Reheat Steam and Bypass System
12.3 Feedwater System
12.4 Deaerator and Feedwater Tank
12.5 Condensate System
12.6 Draining and Discharge System
12.7 Cooling Water System of Auxiliary Machine
12.8 Auxiliary System and Equipment of Heat-supply Unit
12.9 Condenser and the Auxiliary Facilities
13 Water Treatment System
13.1 Water Quality and Water Pretreatment
13.2 Water Pre-desalination
13.3 Boiler Make-up Water Treatment
13.4 Condensate Polishing of Steam Turbine Unit
13.5 Cooling Water Treatment
13.6 Chemical and Water-steam Sampling for Thermal System
13.7 Treatment for Make-up Water and Industrial Backwater of Heat Network
13.8 Waste Water Treatment
13.9 Chemical Storage
14 Information System
14.1 Basic Requirements
14.2 Overall Planning of Plant Information System
14.3 Supervisory Information System for Plant Level
14.4 Management Information System
14.5 Price Bidding System
14.6 Video Monitoring System
14.7 Video Meeting System
14.8 Access Guard Management System
14.9 Training Simulator
14.10 Cabling
14.11 Information Security
15 Instrument and Control
15.1 Basic Requirements
15.2 Automation Level
15.3 Control Mode and Control Room
15.4 Measurement and Instrument
15.5 Alarming System
15.6 Unit Protection System
15.7 On-off Control
15.8 Modulating Control
15.9 Unit Control System
15.10 Auxiliary Workshop Control System
15.11 Control Power Source
15.12 Instrument Tube, Cable and Arrangement of Local Equipment
16 Electrical Equipment and System
16.1 Generator and Main Transformer
16.2 Main Electrical Connection
16.3 AC Auxiliary Power System
16.4 DC System and AC Uninterruptible Power Supply
16.5 High Voltage Switchgear
16.6 Electrical Monitoring and Control
16.7 Elements Relay Protection
16.8 Lighting System
16.9 Cable Selection and Cable Routing
16.10 Grounding System
16.11 Relay Protection and Automatic Safety Device of Power System
16.12 Substation of Dispatch Automation System
16.13 Power system Communication
16.14 In-plant Communication
16.15 Other Electrical Facilities
17 Hydraulic Facilities and System
17.1 Basic Requirements
17.2 Water Source and Water Management
17.3 Water Supply System
17.4 Water Intake Building and Structure
17.5 Piping and Culvert
17.6 Wet Cooling Tower
17.7 Water Surface Cooling
17.8 Air-cooled System
17.9 Water Supply and Water Discharge
18 Auxiliary and Ancillary Facilities
19 Buildings and Structures
19.1 Basic Requirements
19.2 Seismic Resistant Design
19.3 Architectural Design
19.4 Ground and Foundation
19.5 Main Building Structure
19.6 Chimney
19.7 Coal Handling Building and Structure
19.8 Hydraulic Building and Structure
19.9 Supporting Structure of Air-cooled Condenser
20 Heating, Ventilating and Air Conditioning
20.1 Basic Requirements
20.2 Main Building
20.3 Electrical Building and Electrical Equipment
20.4 Coal Handling Building
20.5 Chemical Building
20.6 Other Auxiliary and Ancillary Building
20.7 Plant Cooling and Heating Station and Piping Network
21 Environmental Protection and Water and Soil Conservation
21.1 Basic Requirements
21.2 Prevention and Control of Atmospheric Pollution
21.3 Waste Water and Warm Water Discharge Treatment
21.4 Treatment and Comprehensive Utilization of Ash and Slag and Gypsum
21.5 Noise Prevention and Control
21.6 Environmental Protection Monitoring
21.7 Water and Soil Conservation
22 Fire fighting, Labor Safety and Occupational Health
22.1 Basic Requirements
22.2 Occupational Safety
22.3 Occupational Health
Appendix A Calculation Method for Standard Coal Rate of Unit in Design Condition
Explanation of Wording in This Code
List of Quoted Standards
