Energy-saving gas boiler flue gas condensing heat recovery device
By combining a flexible scraper with a rigid scraper, the problem of reduced heat transfer coefficient caused by fouling in the flue gas condensation recovery device is solved, achieving thorough cleaning of fouling without dead angles and improved heat transfer efficiency.
CN122170429APending Publication Date: 2026-06-09HUNAN XINHANG THERMAL ENERGY TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUNAN XINHANG THERMAL ENERGY TECH CO LTD
- Filing Date
- 2026-02-03
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
Existing flue gas condensation recovery devices suffer from a decrease in heat transfer coefficient due to the formation of a fouling layer between flue gas dust and acidic liquid film during long-term operation, which affects the device's efficiency and economics.
Method used
The flexible scraper is combined with a rigid scraper. Through the drive assembly and steering limit assembly, the scraper uses shear force to peel off the dirt layer as it moves along the pipe wall, and the flow guide baffle achieves solid-liquid separation and dirt removal.
Benefits of technology
It achieves thorough and complete removal of dirt, enhances the dynamic liquid film effect, improves heat exchange efficiency, reduces the rate of dirt accumulation, and extends the life of the device.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122170429A_ABST
Abstract
This invention discloses an energy-saving flue gas condensation heat recovery device for gas-fired boilers, relating to the technical field of flue gas condensation heat recovery. It includes a main shell, internally divided into a flue gas condensation chamber and a condensate collection chamber by a baffle plate; a condensation heat exchange module, located within the flue gas condensation chamber, consisting of multiple heat exchange bends connected in parallel; and an external pipe located outside the main shell and connected to the heat exchange bends, through which boiler return water flows sequentially. It also includes a self-cleaning system for cleaning the outer wall of the heat exchange bends. The self-cleaning system achieves reciprocating motion along the surface of the heat exchange bends, employing a flexible design with high adhesion to the pipe wall, or a rigid scraper with a certain angle. As it moves along the pipe wall, it directly applies shearing force to the dirt layer, forcefully peeling the deposits from the substrate. A steering and limiting component ensures that the scraper remains tightly attached to the pipe wall during bending sections, achieving thorough cleaning without dead angles.
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