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Engineering Construction Standard Full Text Information System
National Standard of the People's Republic of China
50049-94
Code for design of small-size power plant
Code for design of small-size power plant
1994-11-05 Issued
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full Text Information System
1995-07-01 Implementation
Jointly Issued
Engineering Construction Standard Full Text Information System
National Standard of the People's Republic of China
Code for design of small-size power plant plantGB
50049-94
Editor: Ministry of Electric Power Industry of the People's Republic of ChinaApproval department: Ministry of Construction of the People's Republic of ChinaEffective date: July 1, 1995
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Notice on the release of the national standard "Design Specifications for Small Thermal Power Plants"
Jianbiao [1994] No. 670
According to the requirements of the State Planning Commission's Document No. Jizong [1989] 30, the national standard "Design Specifications for Small Thermal Power Plants" edited by the Ministry of Electric Power Industry and revised jointly with relevant units has been reviewed by relevant departments. The "Design Specifications for Small Thermal Power Plants" GB50049-94 is now approved as a mandatory national standard and will be implemented from July 1, 1995. The original national standard "Design Specifications for Small Thermal Power Stations" GBJ49-83 will be abolished at the same time.
This specification is managed by the Ministry of Electric Power Industry, and its specific interpretation and other work is the responsibility of Henan Electric Power Survey and Design Institute, and its publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
November 5, 1994
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2 Heat and Electric Load and Site Selection
2.1 Heat Load and Heat Medium
2.2 Electric Load
2.3 Site Selection
3 Plant Planning
Basic Provisions
2 Layout of Main Buildings and Structures
Transportation·
3.4 Vertical Layout...
3.5 Pipeline Layout...||t t||4 Main plant layout
Basic provisions
Main plant layout
Maintenance facilities…
Comprehensive facilities
5 Coal transportation system
Basic provisions
Coal unloading equipment and off-site transportation
Coal transportation facilities
5.4 Coal storage yard and its equipment
5.5 Screening and coal crushing equipment
5.6 Coal transportation auxiliary facilities and ancillary buildings
6 Boiler equipment and system
6.1 Boiler equipment
Engineering construction standard full text information system
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Engineering Construction Standard Full Text Information System
.2 Coal powder preparation.·
6.3 Blower, suction fan, secondary fan and dust removal equipment...6.4 Ignition and fuel oil system*
6.5 Boiler blowdown system and its equipment
7 Ash removal system
7.1 Basic provisions.
7.2 Hydraulic ash removal system
7.3 Pneumatic ash removal system
Mechanical ash removal systembzxZ.net
Control and maintenance facilities
8 Steam turbine equipment and system
Steam turbine equipment
Main steam and heating steam system
Feedwater system and feedwater pump
Deaerator and feedwater tank.
Condensate system and condensate pump
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Hydrophobic expansion container, hydrophobic box , drain pump and low-level water tank, low-level water pump (47 Industrial water system..
8.9 Heat network heater and its system
8.10 Temperature reduction and pressure reduction device
8.11 Condensate recovery equipment of steam thermal network 8.12 Condenser and its auxiliary facilities
9 Hydraulic system and facilities
9.1 Water supply system
9.2 Water intake structure and water pump room
.. Cooling facilities·
9.4 Ash pipe and ash storage yard outside the factory.
9.5 Domestic and fire water supply and drainage
9.． Hydraulic structures
10 Water treatment equipment and systems
Engineering 2 Construction Standards Full Text Information System
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Engineering Construction Standards Full text information system
10.1 Raw water pretreatment
10.2 Boiler feed water treatment..
10.3 Feed water, boiler water correction treatment and thermal system water vapor sampling 104 Circulating cooling water treatment
10.5 Heating network feed water and production return water treatment 10..6 Anti-corrosion
10.7 Drug storage and measurement, laboratory and testing equipment 11
Power system
Power plant Connection with power grid
System protection
System communication
System telecontrol
Electrical equipment and system
Electrical main wiring
Plant power system
High-voltage distribution device
General layout of electrical buildings and structures
Electrical main control building (room)
DC system
Secondary wiring
Electrical measuring instruments||tt| |Relay protection and safety automatic devices
Lighting system
Cable selection and laying
Overvoltage protection and grounding
In-plant communication
Repair and test
Electrical devices in explosive and fire hazardous environments
Thermal automation
Basic provisions
13.2 Control mode
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Engineering Construction Standard Full Text Information System
13.3 Thermal Testing
13.4 Automatic Adjustment
13.5 Remote Control
13.6 Thermal Alarm
Thermal Protection
Electricity
Interlocking,
Power and Gas Source
Control Room
Cables, Conduits and Local Equipment layout
Thermal automation laboratory
14 Heating, ventilation and air conditioning
Basic provisions
Main plant
14.3 Electrical buildings and electrical equipment
Coal transportation building
Chemical building
Other auxiliary and ancillary buildings
Plant heating network and heating station
Buildings and structures
Electricity
Basic regulations 15.3 Indoor environment... 15.5 Living and sanitary facilities... 15.6 Structures... Live loads... 16 Auxiliary and auxiliary facilities... 17 Environmental protection... 17.1 Basic regulations... 17.2 Environmental protection design requirements... 17.3Pollution prevention and control
Engineering construction standard full text information system
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Engineering construction standard full text information system||tt| |17.4 Environmental Management and Monitoring
17.5 Environmental Protection Facilities
18 Labor Safety and Industrial Hygiene
Fire prevention, explosion prevention
Prevention of electric injury, mechanical injury, falling and other injuries.18.3
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Dust removal, poison prevention and chemical injury prevention
Hot summer, cold and moisture prevention
Noise and vibration prevention
Labor Safety and Industrial Hygiene Sanitary facilities·
Fire hazards and fire resistance levels of buildings and structures in the production process
Minimum spacing between buildings and structures in power plantsMinimum horizontal clearance between underground pipelines and buildings and structures·
Minimum horizontal clearance between underground pipelines
Minimum vertical clearance between underground pipelines or when crossing railways or roads
Minimum horizontal clearance between overhead pipelines and buildings and structures Appendix F
Horizontal clearance·
Appendix G
Appendix H||tt ||Appendix J
Appendix K
Minimum vertical clearance of overhead pipelines across railways or roads. Calculated indoor temperature for winter heating in buildings of power plants. Regulations on summer air temperature in workshops. Adjustment of seismic fortification intensity of some buildings and structures of power plants. Lighting standards and window-to-floor area ratio of buildings in power plants: Appendix L
Appendix M
Appendix N
Noise limit values for various production workplaces. Live loads on roofs, floors (ground) of various buildings. Appendix P
Explanation of terms used in this code.
Additional Notes·
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
1 General Principles
1.0.1 In order to implement the basic construction principles and policies of the country in the design of small thermal power plants (hereinafter referred to as power plants), give priority to cogeneration, pay attention to economic and social benefits, save energy, save project investment, save raw materials, shorten the construction period: use coal resources according to local conditions, implement comprehensive utilization, save land and water, protect the environment, implement the provisions of current national standards such as labor safety and industrial hygiene, and meet national conditions, advanced technology, economic rationality, safe and reliable operation, this specification is formulated. 1.0.2 This specification is applicable to the design of new or expanded coal-fired power plants with dry pressure parameters of sub-medium pressure, medium pressure, sub-high pressure, single boiler rated evaporation capacity of 20~130t/h, heating steam turbine power of 1.5~12MW, and condensing steam turbine power of 3~25MW. 1.0.3 The type of power plant shall be determined in accordance with the following provisions: 1.0.3.1 Based on the thermal planning of urban areas, the current situation and development of thermal power load, the characteristics and size of thermal load, and within the economically reasonable heating range, a heating power plant shall be built.
Based on the power planning of urban areas, in areas with abundant coal resources but inconvenient transportation, or areas with no electricity, and areas dominated by small hydropower, to solve the power supply problem in the dry season, when there are coal sources, a condensing power plant of appropriate size and capacity shall be built according to local conditions.
1.0.3.3 Based on the needs of the enterprise's planning and development of thermal and electrical loads, an enterprise-provided heating power plant of appropriate size may be built.
1.0.4 The selection of the unit of a heating power plant shall be based on the principle of "determining electricity by heat", and shall be reasonably determined after technical and economic comparison based on the size and characteristics of the thermal load. 1.0.5 The selection of pressure parameters of power plant units should be planned in a unified manner for short-term and long-term construction, and should comply with the following regulations:
1.0.5.1 For a unit with a capacity of 1.5MW in a heating power plant, it is advisable to use sub-medium pressure or medium pressure parameters: for a unit with a capacity of 3MW, it is advisable to use medium pressure parameters: for a unit with a capacity of 6MW, it is advisable to use medium pressure or sub-high pressure parameters; for a unit with a capacity of 6MW or more, it is advisable to use sub-high pressure parameters.
1.0.5.2 For a unit with a capacity of 3MW in a condensing power plant, it is advisable to use sub-medium pressure parameters: for a unit with a capacity of 6MW or more, it is advisable to use medium pressure or sub-high pressure parameters. 1.0.5.3 The units in the same power plant should use the same parameters. 1.0.6 The number of units planned to be installed in a power plant should not exceed 6 for a heating power plant; and should not exceed 4 for a condensing power plant. 1.0.7 The power plant should be designed and planned in general according to the planned capacity. A newly built power plant can be built at one time or in stages according to the planned capacity, depending on the load growth rate. When it is difficult to construct the main control building (room) and shore pump house of the power plant in stages, it can be built at one time according to the planned capacity.
1.0.8 When the auxiliary facilities, ancillary production facilities, and living welfare facilities of the enterprise's self-provided power plant are planned and constructed by the enterprise, the power plant should not have duplicate systems, equipment or facilities.
When the water replenishment volume of the enterprise's self-provided heating power plant is large, the raw water pretreatment system should be planned and designed by the power plant.
1.0.9 The configuration of the boiler, the selection of the main auxiliary machines, the main production process system and the layout of the main plant of the power plant should be determined after technical and economic comparison. Under the condition that the power plant is safe, economical and reliable, the system and (or) layout can be appropriately simplified.
The level of the power plant equipment provided by the enterprise should be coordinated with the process requirements of the enterprise in combination with the characteristics of the power plant equipment.
1.0.10 The prevention and control and discharge of various pollutants such as coal dust, wastewater, sewage, flue gas, ash and noise in the power plant should implement the relevant provisions of the national environmental protection laws, regulations and standards, and should comply with the relevant provisions of the labor hygiene and industrial hygiene standards. Only after meeting the standards can they be discharged.
The pollution prevention and control engineering facilities and labor hygiene and industrial hygiene facilities must be designed, constructed and put into operation at the same time as the main project. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
It is strictly forbidden to discharge ash into rivers, lakes and seas. 1.0.11 The seismic design of the power plant must comply with the relevant provisions of the current national standard "Code for Seismic Design of Buildings".
1.0.12 In addition to complying with the provisions of this code, the design of power plants shall also comply with the provisions of current national standards and specifications. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
2 Heat and Electricity Loads and Site Selection
2.1 Heat Load and Heat Medium
2.1.1 The heat load of regional heating power plants shall be determined after investigation and verification based on the thermal planning of urban areas. The heat load of enterprise-provided heating power plants shall be determined according to the heat supply required by the enterprise planning.
The planned capacity and phased construction scale of heating power plants shall be determined based on the short-term and long-term heat loads investigated and implemented. 2.1.3 The economically reasonable heating range of heating power plants shall be determined through technical and economic comparison based on factors such as the characteristics, distribution, density, heat source cost, heating network cost and heating medium parameters of the heat load. The transmission distance of the steam network should not exceed 4km, and the transmission distance of the hot water network should not exceed 10km.
2.1.4 To determine the design heat load, the heat source profile, heat source distribution, heat supply and heating parameters within the heating range should be investigated, and the following requirements should be met: 2.1.4.1 Industrial steam heat load, the nature of the current and planned heat load of each heat user, steam parameters, steam use methods, heat use methods, return water conditions and the average steam consumption and steam use hours in each month in the past year should be investigated and collected. According to the hourly steam consumption of each heat user on typical days in different seasons, the maximum, minimum and average hourly steam consumption in winter and summer should be determined. For major heat users, the heat load curves of typical days in different seasons and the annual continuous heat load curves should also be drawn.
2 Heating heat load, the types of heating users in the near and long term within the heating range should be collected, and the heating area and heating heat index should be calculated respectively. According to local meteorological data, the hourly heat load corresponding to each outdoor temperature from the starting temperature to the heating outdoor calculated temperature and the average heat load during the heating period should be calculated, and the heating annual load curve should be drawn. The utilization hours of the maximum heat load and the utilization hours of the average heat load should also be calculated.
Engineering Construction Standard Full Text Information System2
Type, calculate the heating area and heating heat index respectively. According to the local meteorological data, calculate the hourly heat load corresponding to each outdoor temperature from the starting temperature to the heating outdoor calculation temperature and the average heat load during the heating period, draw the heating annual load curve, and calculate the utilization hours of the maximum heat load and the utilization hours of the average heat load.
Engineering Construction Standard Full Text Information System
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