Horizontal type phase change smoke waste heat recovering and double-effect heating system and control method thereof
A flue gas waste heat and heating system technology, which is applied to heat storage heaters, fluid heaters, lighting and heating equipment, etc., can solve the problems of different blockage characteristics of heat exchangers and the inability to ensure safe and stable operation of heat exchangers, etc., to achieve Achieve energy-saving benefits, reliable performance, and reasonable structural design
Inactive Publication Date: 2016-08-10
HANGZHOU HUADIAN ENERGY ENG
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Problems solved by technology
However, since the heat exchange between the heating network water, condensed water and flue gas is carried out through the same set of heat exchangers, and the water quality of the two is very different, the scaling and clogging characteristics of the heat exchangers are different during long-term operation, so it cannot be guaranteed Safe and stable operation of heat exchanger
[0005] To sum up, there is currently no double-effect horizontal phase change with reasonable structure design, reliable performance, recovery of flue gas waste heat, long-term safe and stable heating of heating network water and condensate water, and maximum energy-saving benefits. Flue gas waste heat recovery heating system
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[0024] see figure 1 , the new horizontal phase-change flue gas waste heat recovery double-effect heating system in this embodiment includes a flue 1, an evaporation heat exchanger 2, an electric regulating valve for the first working fluid inlet 4, a first working fluid inlet pipe 5, and a first Working medium circuit gate valve 7, first working medium circuit pipe 8, double-effect phase change hot steam drum 12, down pipe working medium temperature measuring instrument 19, flue gas temperature measuring instrument 20, second working medium inlet electric regulating valve 23, The second working fluid inlet pipe 22 , the second working fluid circuit gate valve 26 , the second working fluid circuit pipe 25 , and the terminal controller 26 .
[0025] The evaporative heat exchanger 2 in this embodiment is installed in the flue 1, the evaporative heat exchanger 2 is provided with an ascending header 15 and a descending header 18, and the flue gas thermometer 20 is installed behind ...
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The invention relates to a system used for recovering the waste heat of smoke and heating heat supply network water or condensation water through the horizontal type phase change technology and a control method thereof. The system comprises a flue, an evaporation heat exchanger, an ascent pipe header and a descent pipe header, wherein the evaporation heat exchanger is arranged inside the flue and is provided with the ascent pipe header and the descent pipe header; the system is characterized by further comprising a double-effect phase-change heat exchange steam drum, a first heat exchange tube bundle and a second heat exchange tube bundle. According to the control method, the smoke flows through the evaporation heat exchanger along the flue, the waste heat of the smoke heats condensation working media inside the evaporation heat exchanger for generating steam, the steam enters the double-effect phase-change heat exchange steam drum through the ascension pipe header, the descent pipe header and an ascent pipe port. According to the system and the control method thereof, the waste heat of the smoke can be recovered, the heat supply network water and the condensation water can safely and stable be heated for a long time, and the energy-saving benefit can be maximized.
Description
technical field [0001] The invention relates to a flue gas waste heat recovery system, in particular to a system and a control method for recovering flue gas waste heat by using a horizontal phase-change heat technology to heat hot water or condensed water. Background technique [0002] For boilers, exhaust heat loss has a significant impact on boiler efficiency. Among them, the exhaust gas temperature of the boiler is an important factor affecting the heat loss of the exhaust gas. Reducing boiler exhaust gas temperature is of great significance for improving boiler efficiency, saving fuel, and reducing pollutant emission indicators. [0003] At present, the main recovery method is to recover the waste heat of the flue gas to the low-plus condensate system through low-temperature economizer technology. However, for northern heating units, when operating in winter heating conditions, due to the existence of heating extraction, the amount of condensed water that can be used ...
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IPC IPC(8): F23J15/06F24H7/04
CPCF23J15/06F24H7/0408Y02E20/30
Inventor 孙少鹏胡清曹荣朱文中杨鹏许青云
Owner HANGZHOU HUADIAN ENERGY ENG