Integrated heat supply system for flue gas source heat pump waste heat recovery, flue gas white smoke removal and off-peak electricity phase change energy storage gradient temperature rise

Abstract

The invention discloses an integrated heat supply system for flue gas source heat pump waste heat recovery, flue gas white smoke removal and off-peak electricity phase change energy storage gradient temperature rise, and relates to the field of boiler flue gas white smoke removal, heat energy recycling and phase change energy storage. The objective of the invention is to solve the problem that white smoke is formed at a chimney opening in wet smoke exhausted by a boiler, visual pollution is generated, haze weather is intensified, and existing fused salt heat storage technology cannot meet theindustrial production requirement. The smoke source heat pump and the sleeve tank phase change energy storage device are creatively combined to generate a good effect. The flue gas source heat pump ofthe system can achieve complete recycling of natural gas heat energy, and the phenomenon of white smoke emission is eliminated. The sleeve tank phase change energy storage device raises 60 DEG C hotwater generated by the flue gas source heat pump into 95 DEG C hot water and 120-180 DEG C steam through the off-peak electricity energy storage warming system and supplies the hot water and the steamback to the boiler heat supply system, and environmental benefits and energy-saving benefits of eliminating chimney white smoke, reducing boiler natural gas consumption and reducing energy consumption cost are achieved.

Description

technical field [0001] The invention relates to the fields of boiler flue gas dewhitening, heat energy recovery and utilization, and phase change energy storage, and in particular to an integrated heating system for waste heat recovery of a flue gas source heat pump, flue gas dewhitening and valley electricity phase change energy storage cascade temperature increase. Background technique [0002] The flue gas emitted by gas-fired boilers contains a large amount of water vapor, and the temperature of the flue gas from coal-fired power plants and boilers after wet desulfurization and denitrification (ultra-low emission) also contains a large amount of water vapor and condensable particulate matter. The emission of these wet flue gases Under certain ambient air humidity conditions, a large amount of white smoke will be formed at the mouth of the chimney, which will not only cause visual pollution, but also aggravate the formation of haze weather. Therefore, it is imperative to r...

AI Technical Summary

Problems solved by technology

For units of industrial steam boilers that operate all year round, there is no demand for low-temperature hot water, which limits the promotion and application of this technology

[0004] The valley power energy storage technology developed in recent years is mainly used in heating and domestic hot water in the north, which is difficult to apply in the field of industrial manufacturing

The existing molten salt heat storage technology has the disadvantages of high cost of the circulation heat exchange system, harsh conditions of use (it needs to be kept above 150°C at all times, and the circulation system will be scrapped if it is not evacuated and condensed), large heat loss, and seasonal use. Disadvantages such as high cost of melting and emptying

The existing energy storage technology still has the phenomenon of gradual cooling and heating, which cannot meet the needs of stable production in the industrial manufacturing field

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