Smoke condensation heat recovery combined heat and power supply system based on organic Rankine cycle

A flue gas condensation and Rankine cycle technology, applied in air heaters, mechanical equipment, steam engine devices, etc., can solve problems such as being in the primary stage, and achieve the effects of reducing emissions, improving thermal efficiency, and being beneficial to environmental protection.

Active Publication Date: 2013-08-14
淳能热电科技股份有限公司
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Problems solved by technology

Foreign countries have begun to develop and use condensing boilers as early as the 1970s and 1980s, and my country's research is still in its infancy.

Method used

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  • Smoke condensation heat recovery combined heat and power supply system based on organic Rankine cycle
  • Smoke condensation heat recovery combined heat and power supply system based on organic Rankine cycle

Examples

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Embodiment 1

[0018] Taking the natural gas heating boiler as an example, the simulation calculation is carried out. Table 1 shows the data and calculation results used in the calculation. Among them, the organic Rankine cycle uses R600a as the working fluid, which is a subcritical cycle. It can be seen from the table that the total amount of waste heat absorbed by the device is 3943kW, and the thermal efficiency calculated by the traditional low calorific value standard is increased to 101.08%. It can be seen that the device can significantly improve the efficiency and achieve the effect of energy saving and emission reduction. At the same time, the calculation shows that in the flue gas without waste heat recovery, the mass fraction of water vapor is as high as 12.21%, the volume fraction is 18.76%, and the dew point temperature is 59.0°C. When the final discharge temperature of the flue gas drops to 40°C, the mass fraction of water vapor is 5.13%, the mass recovery rate is 61.15%, and t...

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Abstract

The invention relates to a smoke condensation heat recovery combined heat and power supply system based on organic Rankine cycle and belongs to the technical field of energy utilization. The system comprises an evaporator (1), a condenser (4) and the like. The evaporator (1) and a smoke condensation heat exchanger (6) are disposed in a boiler tail flue. The system is used for step recovery of boiler smoke sensible heat and latent heat to allow for gradient deep utilization of smoke waste heat; high-quality sensible heat in the smoke is absorbed and utilized to output electric energy by organic Rankine cycle; and low-quality sensible heat and vapor latent heat in the smoke are absorbed by cold water, and the smoke is cooled to the temperature below dew point. In addition, organic Rankine cycle condensation temperature is lower than smoke temperature, so that the cold water sequentially passes the condenser and the smoke condensation heat exchanger to be heated and smoke waste heat is utilized deeply. The smoke condensation heat recovery combined heat and power supply system based on organic Rankine cycle allows for combined heat and power supply by organic Rankine cycle and gradient deep utilization of natural gas boiler smoke and fully recovers the heat; is environment-friendly; and is important to improving comprehensive utilization rate of fossil energy in China and promoting industrial energy conservation.

Description

technical field [0001] The invention relates to a combined heat and power system for recovering flue gas condensation heat based on an organic Rankine cycle, in particular to a combined heat and power system for recovering boiler flue gas condensation heat based on an organic Rankine cycle, and belongs to the technical field of energy utilization. Background technique [0002] The total amount of industrial waste heat resources in my country is as high as 800 million tons of standard coal, accounting for about 30% of my country's total energy consumption. The effective use of waste heat is of great significance to my country's industrial energy conservation. Among them, the waste heat of flue gas accounts for more than 50% of the total industrial waste heat resources, and is distributed in various industries such as metallurgy, chemical industry, building materials, machinery, and electric power. It has great energy-saving potential and is the main object of waste heat utiliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K27/00F01K17/02F24H8/00
CPCY02B30/102Y02E20/14Y02B30/00Y02P80/15
Inventor 徐进良刘超
Owner 淳能热电科技股份有限公司
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