Boiler energy-saving device, and method and tool for manufacturing S-shaped fin heat exchange tube of boiler energy-saving device

Abstract

The invention discloses a boiler energy-saving device, and a method and a tool for manufacturing an S-shaped fin heat exchange tube of the boiler energy-saving device. The boiler energy-saving device mainly comprises a box body and an S-shaped heat exchange tube which is arranged in the box body; the S-shaped fin heat exchange tube is of an integrated structure and is manufactured by bending a whole tube. The method for manufacturing the S-shaped fin heat exchange tube comprises the following steps: (1) welding a plurality of tubes into a whole tube, in which the total length of the tubes is not smaller than that of the S-shaped heat exchange tube; (2) marking lines according to the length and the number of straight tube sections of the S-shaped heat exchange tube and marking relative positions of all straight tube sections and elbow joints; (3) welding a spiral fin on the outer wall of each straight tube section; (4) bending each part corresponding to the elbow joint on the straight tube of the step (3) one by one to form an elbow joint. The tool of the method is one set of mold which is combined by an upper half part and a lower half part; the mold is matched with a tube bending machine for bending and manufacturing the heat exchange tube; the heat exchange tube is manufactured by bending one whole tube; the S-shaped heat exchange tube is formed by welding the spiral fin with high-frequency resistance; the efficient heat conduction is ensured; by virtue of the manufacturing method and the tool, the manufacturing cost is lowered.

Description

Technical field: [0001] The invention relates to an energy-saving device, in particular to a boiler energy-saving device and a manufacturing method and tooling thereof for serpentine fin heat exchange tubes. Background technique: [0002] With the rapid development of China's economy, my country's energy shortage and air pollution problems are becoming more and more serious, and energy conservation and emission reduction have been put on the important agenda. In my country, the thermal efficiency of industrial oil, gas, and coal-fired boilers is generally about 70%, and about 30% of energy is wasted. Among the wasted heat energy, the heat energy of high-temperature waste heat flue gas accounts for the vast majority. Under normal circumstances, the temperature of exhaust gas at the tail of steam and hot water boilers is above 200°C, and the temperature of exhaust gas at the tail of heat-conducting oil boilers is above 280°C-350°C. The environment is seriously damaged, and th...

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Problems solved by technology

Multi-row serpentine finned tube groups are assembled with splints at equal intervals to form serpentine finned tube heat exchange components. This production method requires a large number of welded joints, long flaw detection time, low production efficiency and high production cost.

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