High-efficiency, sub-control and phase-change heat exchange system and method

Abstract

The invention relates to a high-efficiency, sub-control and phase-change heat exchange system. The heat exchange system provided by the invention comprises a heat exchanger of heat source (3) and a heat exchanger of cold source (12) which are mutually communicated through a steam tube and a condensate line to from a sub-control and phase-change heat exchange circuit. The heat exchange circuit is provided with an air flow regulating valve and a liquid flow regulating valve which can control the circuit. A reservoir tank (16) is configured on the condensate line. The header of the steam tube onthe top of the heat exchanger of heat source (3) is divided into two steam sub-tubes. A first steam sub-tube is connected with the heat exchanger of heat source (12) and an air flow regulating valve (11) is configured between the first steam sub-tube and the heat exchanger of cold source (12). A second steam tube communicates with the reservoir tank (16) via a condensate heater (18) configured inside the reservoir tank (16). A liquid distribution tube (6) is configured inside the collecting chamber (7) of the heat exchanger of heat source (3), and a plurality of sprayers are configured on theliquid distribution pipe which is used for the mixing heat exchange of steam and condensate. The efficiency of the system provided by the invention is much higher.

Description

technical field

[0001] The invention relates to the technical field of safe and controllable enhanced heat transfer, in particular, the invention relates to a high-efficiency separate-controlled phase-change heat system and a heat-exchange method. Background technique

[0002] In terms of flue gas waste heat recovery and utilization, different phase conversion heat technology schemes are used to control the corrosion and ash deposition speed of the heating surface on the flue gas side, and better results have been achieved. Previously, a Chinese patent application number 201110034409.1 proposed a split-controlled phase-change heat system, including: a heat-absorbing device and a heat-release device that form a split-controlled phase-change heat circuit through the interconnection of steam pipes and condensate pipes, The system also includes: an air flow regulating valve and its air flow regulating valve controller; a liquid flow regulating valve and its liquid flow regulatin...

Images