1, increased steam parameters

Conventional supercritical unit steam turbine characteristic parameter for 24.2MPa/566 c/566 c, general characteristic parameter for ultra supercritical unit 25-26.25MPa/600 ° c/600 ℃. Improvement of turbine steam inlet parameters can directly improve unit efficiency, comprehensive economic, security and engineering application of main steam pressure up to 27-28MPa, increase of main steam temperature of main steam pressure and material constraints generally maintained at 600 ° c, hot reheat steam temperature increased to 610 ° c, or 620, efficiency can be further improved. Main steam pressure is greater than 27MPa, each promoting 1MPa inlet steam pressure, reducing turbine heat rate 0.1% per cent. Hot reheat steam temperature by 10 degrees, heat loss can be reduced 0.15%. Compared to conventional Super-supercritical unit is expected to be power supply coal consumption of 1.5~2.5 g/kWh. Technology is more mature.

Applies to 66, 1 million-kilowatt ultra supercritical unit design optimization.

2, the second reheat

In General once again on the basis of thermal, steam exhaust secondary into the boiler for reheating. Increase ultra-high pressure cylinder of steam turbine, ultra high pressure exhaust steam for cold reheated, after boiler reheater heating into the high-pressure cylinders, high pressure exhaust steam for secondary reheat cold, after the after boiler reheater heating into the intermediate pressure cylinder. 2%~3% higher than the thermal efficiency of a reheat unit could reduce coal consumption for power supply 8~10 g/kWh more technologically sophisticated.

United States, and Germany, and Japan, and Denmark and other parts of the nation's more than 300,000-kilowatt units have been used. Domestic 1 million-kilowatt reheat technology demonstration projects.

3, pipeline system optimization

By increasing pipe diameter and reducing elbows, bends and lateral, low resistance connection pieces, such as measures to reduce main steam and reheat, water pipe resistance. Turbine efficiency is increased 0.1%~0.2% to reduce coal consumption for power supply 0.3~0.6 g/kWh. The technology is mature.

Suitable for all levels of capacity units.

4, outer steam cooler

Ultra super-critical high pressure heater steam because the steam temperature is high, usually has fever, by setting up independent outer steam cooler, making full use of overheated steam enthalpy, improve the efficiency of heat recovery systems. Is expected to be the power supply coal consumption of about 0.5 g/kWh. Technology is more mature.

Suitable for 66, 1 million-kilowatt ultra-supercritical units.

5, low-temperature economizer

Dust desulfurization Tower entrance or entrances set 1-stage or 2-stage series of low temperature economizer used temperature range the appropriate part of the flue gas waste heat recovery of condensate water, reducing flue gas temperature and thus reduce the volumetric flow, improve efficiency and reduce fan power consumption. Is expected to reduce coal consumption for power supply 1.4~1.8 g/kWh the technology is mature.

Apply to 30~100 kilowatt units in all.

6, 700 c ultra-supercritical

New nickel-based high temperature materials research and development after the success of steam parameters can be increased to 700 c, significantly raise the thermal efficiency of power supply coal consumption is expected to reach 246 g/kWh. Technology research and development stages.

7, steam turbine flow passage retrofit

13.5, 200,000-kilowatt and 2000 years ago, and operation of steam turbine and 600,000-kilowatt for subcritical steam turbine, flow low efficiency, high heat consumption. Full three dimensional optimization design of steam turbine flow passage, using new type high efficiency blade and new type steam seal technology turbine, energy conservation and efficiency significantly. Is expected to reduce coal consumption for power supply 10~20g/kWh. The technology is mature.

Apply to 13.5~60 kilowatt units in all.

8, gap adjustment of steam turbine and steam turbine retrofit

Portion of turbine cylinder prevailing efficiency of low pressure cylinder efficiency decreased with increased run time issues declining, mainly due to incomplete flow passage of steam turbine, labyrinth seal, in steam turbine cylinder joints serious leakage, short circuit stage-leakage and steam. By turbine technology, improve operational efficiency, energy conservation and efficiency results are obvious. Is expected to reduce coal consumption for power supply 2~4g/kWh. The technology is mature.

Apply to 30~60 kilowatt units in all.

9, steam turbine main steam filter NET study on optimization of structure type

In order to reduce reheat steam on turbine flow passage of solid particles and foreign bodies injuries, main steam valves are equipped with filters. Common filter diameter for PHI 7, have been provided with a chamfer. Mesh structure and pore size needs to be further studied. Steam pressure drop and heat loss can be reduced, there is no power supply coal consumption estimates. The technology is mature.

Suitable for all levels of capacity units.

10, boiler flue gas waste heat recovery and utilization

Desulfurization Tower between the air preheater and flue and fit through the installation of flue gas cooler, used to heat the condensate and boiler low temperature water supply or urban heating network, partial heat recovery, so as to achieve energy conservation and efficiency, and water saving effect. Using low pressure economizer technologies, lower exhaust gas temperature 30 ℃, the coal consumption for power supply unit can reduce the 1.8g/kWh FGD systems reduce water consumption by 70%. The technology is mature.

Suitable for exhaust gas temperature more than 20 degrees centigrade higher than the design value of the unit.

11, the boiler heating surface and fan

Boiler flue gas temperature prevailing high, fan high power consumption, through transformation, flue gas temperature and wind power consumption can be reduced. Specific measures include: primary air fan and induced fan Turbo fan impeller modification of frequency conversion transformation or renovation of economizer of boiler heating surface. Coal consumption is expected to decrease 1.0~2.0g/kWh. The technology is mature.

Applies to 300,000-kilowatt subcritical units, supercritical and subcritical unit 600,000-kilowatt unit.

12, boiler operation optimization

Power plant coal-fired and designed coal species are quite different, great impact on boiler combustion. Optimization of boiler's combustion and pulverizing system tests were carried out to determine reasonable air, wind and powder of pulverized coal fineness ratio, and so on, is conducive to optimal operation of power plants. Is expected to reduce coal consumption for power supply 0.5~1.5g/kWh. The technology is mature.

Active capacity units can be used at different levels.

13, electro-precipitator retrofitting and operation optimization

Based on the typical coal, selecting different loads, combined with the soot, and so on, in case of guarantee soot emission concentration targets, tests to determine the best way of power supply control (dust collector power consumption rate of minimum) and the corresponding control parameters. Through energy-saving retrofit of electrostatic precipitators and operation optimization, power-saving effect. Is expected to be about 2~3g/kWh power supply coal consumption. The technology is mature.

Applies to active 300,000-kilowatt in subcritical units, supercritical and subcritical unit 600,000-kilowatt unit.

14, heating and drainage system improvements

Improved heating and draining system that simplifies thermal system, reducing the number of valves, control valves leak, make good effect energy conservation and efficiency. Is expected to reduce coal consumption for power supply 2~3g/kWh. The technology is mature.

Applicable to all levels of capacity units.

15, steam turbine valve management optimization

Starting under the law by going on a different order of steam turbines of steam distribution imbalance calculation of steam force, as well as the comprehensive analysis on the bearing unit, using valve opening sequence recombination and optimization techniques, addressing unit tiles in sequence valve operation temperature, vibration problems can make the unit ready for operation in sequence valve operation, thereby enhancing the efficiency of the unit. Is expected to reduce coal consumption for power supply 2~3g/kWh. Mature technology

Applies to more than 200,000-kilowatt units.

16, improvement and operation optimization of steam turbine cold end system

Poor performance of steam turbine cold end, characterized by low vacuum of units. Through the adoption of technical measures, improve the unit vacuum, energy conservation and efficiency that can be achieved very good results. Is expected to reduce coal consumption for power supply 0.5~1.0g/kWh. The technology is mature.

Applies to 300,000-kilowatt subcritical units, supercritical and subcritical unit 600,000-kilowatt unit.

Appropriate section of pure condensing steam turbine the steam system transformation, pick up steam pipes and valves, by diverting some steam, pure condensing steam turbines equipped with condensate power generation and CHP dual-use capabilities. Significantly reduce the coal consumption for power supply, generally reaches above 10g/kWh. The technology is mature.

Apply to 12.5~60 million kilowatt of pure condensing steam turbines.

17, high-pressure of deaerator waste steam recovery

Place pressure deaerator valve of oxygen lack of steam through the surface heat exchanger to improve chemical brine temperature, temperature rises after the chemical removal of salt added to the condenser can reduce undercooling, which increase the thermal efficiency. Is expected to be about 0.5~1g/kWh power supply coal consumption of mature technology.

Apply to 10~30 million kilowatt unit

18, from deep sea water as cooling water in power plant

DC water supply system, water outlet locations and types should consider water features, to learn from the environmental impact of cold water, warm water, sediment and construction and other factors. If possible, take a low water temperature in the deep water. Water depth and water intake and outlet arrangement of large waterways, docks and other factors. When the DC supply system, circulating water temperature decreased 1 ℃, the power consumption reduced by 1g/kWh. The technology is mature. SPI Heat Exchanger is very suitbale for this application.

Suitable for coastal power plants.

19, operation optimization of desulfurization system

Specific measures include: 1) absorption system (slurry circulating pumps and operation optimization of pH value, oxidation, air flow, liquid absorption tower, limestone particle size) optimization; 2) flue gas system operation optimization; 3) utility systems (such as pulp, dehydrated) Optimization; 4) desulphurization additives used. Can raise efficiency, reduce system failures, to reduce energy consumption and operating costs, increasing coal category adaptability of sulphur. Is expected to be about 0.5g/kWh power supply coal consumption. The technology is mature.

Applies to 300,000-kilowatt subcritical units, supercritical and subcritical unit 600,000-kilowatt unit.

20, condensate pumps frequency conversion transformation

High pressure condensate pump motor adopts frequency conversion device, at peak operation of unit can reduce throttle losses, achieved efficiency and energy-saving effect. Is expected to be about 0.5g/kWh power supply coal consumption. The technology is mature.

30~60 kilowatt unit is widely used in large numbers.

21, sealing of air preheater retrofit

There is often poor sealing of Rotary air preheater and low temperature corrosion, fouling problems such as clogging, resulting in leakage of smoke and wind resistance increases, fan power consumption increased. Advanced sealing technology can be used for renovation, allowing air preheater air leakage rate of less than 6%. Is expected to reduce coal consumption for power supply 0.2~0.5g/kWh. The technology is mature.

Capacity at all levels.

22, high-frequency electro-precipitator power supply modification

ESP modification for high-frequency power supply with variable frequency power. Due to the high frequency in pure DC power supply, the power supply voltage fluctuation, Corona high voltage corona discharge current, thus adding to Corona power. Meanwhile, on the premise of soot has enough charge, greatly reduces the electrostatic precipitator electric electricity energy consumption, achieve the purpose of efficiency and energy saving. ESP power consumption can be reduced. The technology is mature.

Applies to 30~100 million kW unit.

23, enhanced pipeline and valve insulation

Piping and valve insulation technology directly affects the power plant energy efficiency, reduce the external surface temperature design helps to reduce waste. Insulation thickness, will affect the piping layout, support structure. Rated power supply coal consumption estimates. The technology is mature.

Suitable for all levels of capacity units.

24, power plant, energy-saving lighting methods

From the light source, lighting ballast, lamps are considered power plant, selection of energy saving, safety, durability of the lighting equipment. Can some degree reduce electricity use, reduce coal consumption is much lower. Mature technology

Suitable for all types of power plants.

25, heating condensing steam turbine retrofit

Appropriate section of pure condensing steam turbine the steam system transformation, pick up steam pipes and valves, by diverting some steam, pure condensing steam turbines equipped with condensate power generation and CHP dual-use capabilities. Significantly reduce the coal consumption for power supply, generally reaches above 10g/kWh. The technology is mature.

Apply to 12.5~60 million kilowatt of pure condensing steam turbines.

26, subcritical unit renovation

Super (Super) supercritical to subcritical old unit into Super (Super) supercritical units, for turbine, boiler and auxiliary equipment to transform. Boost thermodynamic cycle efficiency. Technology research and development stages.

27, the low (low) gentle and quiet electric precipitator

Heat transfer device is arranged in front of the electrostatic precipitator, temperatures drop to near or below the acid dew point temperature of flue gas, reducing fly ash specific resistance, reduce the amount of smoke, effectively preventing back Corona of electrostatic precipitators, dust collecting efficiency. Dust collection efficiency of up to 99.9%. Low-temperature electrostatic precipitation technology is mature and there are more domestic operation performance. Low-temperature electrostatic precipitation technology in Japan have run performance, are being piloted, corrosion is not yet verified.

28, bag filter

Through the filter of flue gas containing dust bag, dust is attached to the surface of the filter bag when the dust on the surface of the filter bag glued to a certain extent, brush attached to the surface of the filter bag cleaning system of ash, ash fall into the ash bucket, to achieve the goal of filter flue gas. Soot emission concentration can be long-term stability in 20mg/Nm3 the following is hardly affected by the effects of the ash content and components. Technology is more mature.

Suitable for all levels of capacity units.

29, electric-bag dust removal

Integrated electrostatic precipitator and baghouse advantage forward using an electrostatic dust collection 80~90% dust level after the use of bag dust collection of fine dust. Filter export can long-term stability in 20mg/Nm3 the following emission concentration, even up to 5 mg/Nm3, no influence of high and low ash content and composition. Technology is more mature.

Suitable for all levels of capacity units.

30, rotating electrode dust

The anode plate of the last stage of electrostatic precipitator electric field divided into several rectangular plates, connected with the chain and spin move, rotating brush dust on a continuous purge anode plate, eliminating secondary dust and prevent anti-Corona, dust collecting efficiency. Carbon concentrations can be stabilized below 30mg/Nm3, saving power consumption. Technology is more mature.

Applies to 30~100 million kW unit.

31, wet electrostatic precipitator

Dust particles through the electrostatic force on adsorbed to dust, dust erosion on the plate through a sprinkler to vented ash bucket. Meanwhile, spray to spray in the flue can capture tiny soot and can reduce resistance, against the dust moves toward the plate. Usually setting in desulfurization system backend, the dust removal efficiency may reach 70%~80%, which can effectively get rid of PM2.5, fine particles and plaster rained micro-droplets. Technology is more mature.

Internally there are several wet-type electrostatic precipitator technologies being piloted.

32, two-cycle gas desulfurization

With conventional single-cycle principle is basically the same, difference is the grout absorption tower was divided into two separate reactions and forms two loops, each loop running under different PH values and desulfurization carried out under ideal conditions. Uses a single Tower double loop or double Tower double loop. Double circulation desulphurization efficiency of 98.5% or higher. Technology is more mature.

Suitable for all levels of capacity units.

33, low NOx combustion

Using advanced low-NOx combustion technology, dramatically reducing NOx concentrations. Nitrogen oxides concentration can be controlled below 200mg/Nm3 at furnace exit. Technology is more mature.

Suitable for all types of bituminous coal boilers.