Air preheating system and air preheating method for comprehensive waste heat utilization with separate control phase change

A technology of air preheating and air preheater, which is applied in the direction of combustion method, lighting and heating equipment, indirect carbon dioxide emission reduction, etc., and can solve the problem that the temperature of condensed water and incoming water should not be too high, increase the temperature difference of heat transfer, and difficult main heating steam saturation temperature etc.
CN106969373BActive Publication Date: 2019-06-18SHANXI SANHESHENG IND TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANXI SANHESHENG IND TECH
Publication Date
2019-06-18

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Abstract

The invention discloses a respective-control phase change comprehensive waste heat utilization air preheating system and method. The system comprises an air preheater (33), an air preheater front air way (31), an air preheater rear flue (32), a condensate water main pipe (11), a steam main pipe (15), an air heater (28), a flue gas phase change cooler (12), a flue gas water cooler (7), a phase change water heater (17), a condensate water regulating valve (30), a steam flow regulating valve (14) and a liquid flow pipe (5). By means of the respective-control phase change comprehensive waste heat utilization air preheating system and method, a respective-control phase change heat exchange manner is adopted in a final-stage flue gas waste heat recovery heat exchanger, the final-stage flue gas waste heat recovery heat exchanger is combined with a condensate water air heater and a high-temperature flue gas cooler, and waste heat recovery benefits are improved.
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Description

technical field

[0001] The invention belongs to the technical field of safe and controllable heat transfer, and is particularly suitable for use in the fields of waste heat recovery and utilization of boiler flue gas, air preheating and the like. Background technique

[0002] Phase change heat has the characteristics of high heat transfer coefficient, large latent heat carried by the medium, unique correspondence between phase change saturation temperature and saturation pressure, uniform temperature distribution of phase change fluid, and easy control of phase change parameters, so it is widely used in enhanced heat transfer and Waste heat recovery and utilization system.

[0003] Separately controlled phase change technology independently controls the phase change parameters of the cold source and heat source, so that the phase change parameters of the heat source are not affected by the heat exchange phase change parameters of the cold source, and reliably guarantees the ...

Claims

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