CN104019550A

CN104019550A - Double-side strengthened heat transfer smoke tube of vertical gas-fired hot water boiler

Info

Publication number: CN104019550A
Application number: CN201310589711.2A
Authority: CN
Inventors: 吴金星; 王力; 张灿灿; 李亚飞; 贺敏; 李国立; 刘双喜; 刘青锋; 田新稳; 冯新展
Original assignee: Henan Force Heat Energy Equipment Manufacturing Co ltd; Zhengzhou University
Current assignee: Henan Force Heat Energy Equipment Manufacturing Co ltd; Zhengzhou University
Priority date: 2013-11-22
Filing date: 2013-11-22
Publication date: 2014-09-03
Anticipated expiration: 2033-11-22
Also published as: CN104019550B

Abstract

The invention provides a double-side strengthened heat transfer smoke tube of a vertical gas-fired hot water boiler. The double-site strengthened heat transfer smoke tube is characterized in that the smoke tube is sleeved with a longitudinal corrugated fin and a blind tube with a spiral sheet is arranged in the smoke tube. The longitudinal corrugated fin is formed by bending and welding a thin steel plate which is repeatedly folded according to the width half of the space of the smoke tube. The outer wall face of the smoke tube is tightly sleeved with the whole corrugated fin by high-frequency welding, the heat-transfer area of the outer side of the smoke tube can be remarkably increased, and therefore natural-convection heat transfer of water outside the smoke tube is reinforced. After the blind tube is wound by the spiral sheet, the blind tube and the spiral sheet are integrally inserted into the smoke tube and fixed, the smoke flow area is reduced through the blind tube, the smoke flow speed is increased, spiral flow of smoke is generated by the spiral sheet, the smoke flow path is lengthened, and convection heat transfer of the smoke and the wall face of the smoke tube is reinforced. The double-side strengthened heat transfer smoke tube is simple in structure, convenient to manufacture and capable of reinforcing convection heat transfer between the smoke and water, decreasing the smoke discharging temperature of the boiler and effectively improving the heat efficiency of the boiler.

Description

A kind of bilateral augmentation of heat transfer smoke pipe of Verticle gas hot-water boiler

Technical field

The present invention relates to a kind of smoke pipe of Verticle gas hot-water boiler, relate in particular to a kind of bilateral augmentation of heat transfer smoke pipe.

Background technology

Verticle gas hot-water boiler is the important thermal hardware taking natural gas as fuel heat production in next life water, and flue gas is walked in pipe, belongs to smaller hard flour pancake boiler, and it is simple and compact for structure, floor space is little, environmental pollution is low, thereby is widely used.Smoke pipe is the core component of boiler heat exchange system, the general smooth straight that adopts at present, and body of heater limitation in height the length of smoke pipe, make flue gas flow shorter, the heat exchange area deficiency of smoke pipe, the convection transfer rate of flue gas and tube wall face is generally less, thereby smooth straight cannot fully absorb the heat that fuel combustion discharges, cause exhaust gas temperature higher, its exhaust gas temperature is generally more than 230 DEG C according to statistics, not only waste a large amount of heat energy, and can cause environmental thermal pollution, cause the thermal efficiency of Verticle gas hot-water boiler on the low side.Meanwhile, the smoke pipe outside of Verticle gas hot-water boiler is Static Water, be subject to after the heating of smoke pipe wall, and water generation free convection, thereby its coefficient of heat transfer is also smaller.Visible, if improve the overall thermal efficiency of boiler, the convection transfer rate in smoke pipe inner side and outside all needs to improve.

Summary of the invention

The object of the invention is to solve the problems of the technologies described above, provide a kind of novel structure, heat transfer efficiency is higher, manufacturing process is simple, be applicable to the bilateral augmentation of heat transfer smoke pipe of Verticle gas hot-water boiler.

The present invention adopts following technical scheme: by sheet metal, according to the folding rear curling longitudinal ripple fin that is welded of the width of smoke pipe spacing half, overall longitudinal ripple fin adopts high-frequency welding to be closely sleeved on smoke pipe outside wall surface.

One section of isometric with smoke pipe, diameter is less pipe, two ends welding block or only have the welding of gas approach end block blind pipe, flight is wound around and is welded on blind pipe outside wall surface, the helical angle of flight is according to flue gas flow capable of regulating in the time designing, blind pipe and flight entirety are inserted after smoke pipe, and smoke pipe inwall is close in the outer of flight.

Smoke pipe and longitudinal ripple fin, blind pipe and flight form bilateral augmentation of heat transfer smoke pipe jointly.

The present invention adopts after technique scheme, compared with prior art has following beneficial effect: the one, and longitudinal ripple shape fin can significantly be expanded the heat exchange area in smoke pipe outside, must strengthen the outer diabatic process of smoke pipe.The 2nd, smoke pipe and longitudinal ripple fin are all vertical layout, can not produce form drag to the free convection of outside tube water.The 3rd, blind pipe and flight entirety are inserted cigarette

Guan Hou, occupies the part circulation area of smoke pipe, and the circulation area of flue gas is reduced, and can improve flue gas flow rate, and then the convection heat transfer' heat-transfer by convection of strengthening flue gas and smoke pipe wall.The 4th, smoke pipe inner screwy fin can make flue gas produce helical flow, prolong smoke flow process, and then the heat convection of strengthening flue gas and smoke pipe wall.Structure-reinforced by outside in smoke pipe, can significantly improve the convection transfer rate of smoke pipe entirety, effectively strengthen flue gas and water convection heat transfer' heat-transfer by convection, can reduce exhaust gas temperature, thereby improve boiler thermal output, reach the target of the saving energy.

Brief description of the drawings

Fig. 1 is the three-dimensional structure schematic diagram of bilateral augmentation of heat transfer smoke pipe.

Fig. 2 is the blind pipe three-dimensional structure schematic diagram of winding screw sheet.

Fig. 3 is the smoke pipe three-dimensional structure schematic diagram of overcoat longitudinal ripple fin.

In figure, 1-longitudinal ripple fin, 2-flight, 3-blind pipe, 4-smoke pipe.

Detailed description of the invention

As shown in Figure 1, a kind of bilateral augmentation of heat transfer smoke pipe of Verticle gas hot-water boiler, comprise longitudinal ripple fin 1, flight 2, blind pipe 3 and smoke pipe 4, longitudinal ripple fin 1 is sleeved on smoke pipe 4 outside wall surface, flight 2 is wrapped in blind pipe 3 outside wall surface, then entirety is inserted smoke pipe 4, and blind pipe 3 is isometric with smoke pipe 4.

Longitudinal ripple fin 1 by sheet metal according to folding rear curling being welded of the width of smoke pipe spacing half, entirety longitudinal ripple fin 1 adopts high-frequency welding to be closely sleeved on smoke pipe 4 outside wall surface, can enlarge markedly smoke pipe 4 outside heat exchange areas, smoke pipe 4 and longitudinal ripple fin 1 are all vertical layout, can not produce form drag to the free convection of cigarette outside tube water.

Flight 2 is wound around and is welded on blind pipe 3 outside wall surface, and blind pipe 3 and flight 2 entirety are inserted after smoke pipe 4, and smoke pipe 4 inwalls are close in the outer of flight 2, make flue gas produce helical flow, prolong smoke flow process, and then the heat convection of strengthening flue gas and smoke pipe wall.

The two ends welding of blind pipe 3 blocks or only has the welding of gas approach end to block, blind pipe 3 and flight 2 entirety are inserted after smoke pipe 4, occupy the central area circulation area of smoke pipe 4, and the circulation area of flue gas is reduced, can improve flue gas flow rate, and then the convection heat transfer' heat-transfer by convection of strengthening flue gas and smoke pipe wall.

Smoke pipe 4 and be sleeved on the longitudinal ripple fin 1, blind pipe 3 of its outside wall surface and flight 2 is common forms a kind of bilateral augmentation of heat transfer smoke pipe.This strengthening smoke pipe simple in structure, easily manufactured, can strengthen the heat convection between flue gas and water, significantly reduces the exhaust gas temperature of boiler, effectively improves the thermal efficiency of boiler.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims

1. the bilateral augmentation of heat transfer smoke pipe for Verticle gas hot-water boiler, comprise longitudinal ripple fin (1), flight (2), blind pipe (3) and smoke pipe (4), it is characterized in that, longitudinal ripple fin (1) is closely sleeved on smoke pipe (4) outside wall surface, the outer welding flight (2) that is wound around of blind pipe (3), blind pipe (3) and flight (2) entirety are inserted in smoke pipe (4).

2. bilateral augmentation of heat transfer smoke pipe according to claim 1, it is characterized in that, longitudinal ripple fin (1) by sheet metal according to folding rear curling being welded of the width of smoke pipe spacing half, entirety longitudinal ripple fin (1) adopts high-frequency welding to be closely sleeved on smoke pipe (4) outside wall surface, can significantly expand smoke pipe (4) outside heat exchange area, smoke pipe (4) and longitudinal ripple fin (1) are all vertical layout, can not produce form drag to the free convection of cigarette outside tube water.

3. bilateral augmentation of heat transfer smoke pipe according to claim 1, it is characterized in that, flight (2) is wound around and is welded on blind pipe (3) outside wall surface, blind pipe (3) and flight (2) entirety are inserted after smoke pipe (4), smoke pipe (4) inwall is close in the outer of flight (2), make flue gas produce helical flow, prolong smoke flow process, and then the heat convection of strengthening flue gas and smoke pipe wall.

4. bilateral augmentation of heat transfer smoke pipe according to claim 1, it is characterized in that, the two ends welding of blind pipe (3) blocks or only has the welding of gas approach end to block, blind pipe (3) and flight (2) entirety are inserted after smoke pipe (4), occupy the central area circulation area of smoke pipe (4), the circulation area of flue gas is reduced, can improve flue gas flow rate, and then the convection heat transfer' heat-transfer by convection of strengthening flue gas and smoke pipe wall.