1.0.1 In the design of small-size power plan (power plant in brief as follows), the code is made in order to follow basic construction guideline and policy of China, first put heat and electricity cogeneration into practice, pursue economic and social benefits, save energy and engineering investment, save raw material, decrease construction duration, utilize coal minerals to local conditions, realize comprehensive utilization, save water and land consumption, protect environment, execute present national regulations such as labor security and industry sanitation, accord with national status, make economy reasonable, make operation safe and reliable.
1.0.2 The code is adaptable to the design of new-built or expanded coal-fired power plant with pressure parameters of hypo-middle-pressure, middle-pressure and hypo-high-pressure, 20~ 130t/h rated capacity of single boiler, 1.5~12MW power of heat supply turbine, 3~25MW power of condensing turbine.
1.0.3 The ascertainment of power plant type should accord with the regulations listed below.
1.0.3.1 According to the thermodynamic plan in urban area, the present status and development of heat/electrical load, and the characteristics and magnitude of thermodynamic load, heat supply power plant should be built in reasonable and economic heat supply range.
1.0.3.2 According to thermodynamic plan in urban area, condensing power plant with proper capacity should be built with the adaptation to local conditions in some area lack of power or without power when the coal is abundant but the traffic is inconvenient, and in some area where little waterpower is in majority.
1.0.3.3 Self-supply heat supply power plant of enterprise with proper size can be built according to the requirements of heat and electrical load for enterprise development.
1.0.4 The unit type selection of heat supply power plant should rely on the principles of “electricity depending on heat”. It should be ascertained according to the magnitude and characteristics of heat load only after technical and economical evaluation is reasonable.
1.0.5 The selection of unit pressure parameters in power plant should be planned in long-term and short-term construction and should accord with the regulations listed below.
1.0.5.1 The unit with the single capacity of 1.5MW in heat supply power plant should adopt hypo-middle-pressure or middle-pressure parameters. The unit with capacity of 3MW should adopt middle-pressure parameters. The unit with capacity of 6MW should adopt middle- pressure or hypo-high-pressure parameters. And the unit with the capacity of 6MW and above should adopt the hypo-high-pressure parameters.
1.0.5.2 The unit with the single capacity of 3MW in condensing power plant should adopt hypo-middle-pressure parameters. And the unit with the capacity of 6MW and above should adopt the middle-pressure or hypo-high-pressure parameters.
1.0.5.3 The units in the same power plant should adopt the same parameters.
1.0.6 The unit amount of power plant should not exceed six for heat supply power plant and not exceed 4 for condensing power plant.
1.0.7 A general plan should be made for power plant according to plan capacity. New-built power plant can built in one-shot or phased construction according to load increasing speed and plan capacity. Main control building (house), shore-side water pump house can be built at one time according to plan capacity if phased construction of their civil-work part is difficult.
1.0.8 The auxiliary facilities, accessory production facilities and living welfare facilities in self-supply power plant of enterprise should not be repeated when they are built by enterprise uniformly.
When make-up water quantity in self-supply heat supply power plant of enterprise is large, the pre-treatment system of raw water should be designed by power plant.
1.0.9 Boiler and turbine allocation, main auxiliaries selection, main production process system and main workshop allocation in power plant should be ascertained with the technical and economic evaluation.
The system and (or) allocation should be simplified appropriately when safe, economic and reliable operating conditions are satisfied.
Equipments level in self-supply power plant of enterprise should coincide with the process requirements of enterprise through the combination with device characteristics in power plant.
1.0.10 The protection and emission of various pollutants in power plant such as coal dust, waste water, sewage, flue gas, ash and slag, noise and so on, should follow the relevant regulations in law, code and standard about national environment protection. And it should also accord with the relevant regulations in the standards of labor sanitation and industry sanitation. When the pollutants approach the emission standards, they can be emitted.
The engineering facilities for pollutants protection and labor and industry sanitation facilities should be designed, constructed and put into practice simultaneously with main engineering.
Ash and slag into river, lake and sea is seriously forbidden.
1.0.11 The antiseismic design of power plant should execute the relevant regulations in the standard “Code for Design of Antiseismic Architecture”.
1.0.12 The design of power plant should execute the relevant regulations in present national standards and codes except the code.
