CN201149241Y - Boiler - Google Patents

Abstract

A boiler can realize grading reverse heat exchange. A water-cooling wall pipe and a smoke pipe of a steam boiler, and boiler feed water nearby are sequentially heated by the flame and the smoke in a hearth; and the steam boiler of the boiler are designed to be two or more sections for forming two or more steam circulating systems, so that the flame and the smoke in the hearth and the boiler feed water can realize grading reverse heat exchange via the sections of the steam boiler, the smoke discharge temperature can be lowered, and the heat efficiency of the boiler can be improved.

Description

Boiler

Affiliated technical field

A kind of boiler that the utility model relates to is that the chemical energy with fuel converts heat energy to by burning, and with the heat energy feedwater that comes heating boiler of conversion, and the acquisition some, the steam of pressure and temperature or the equipment of hot water especially can be realized the boiler of reverse heat-exchange stage by stage.

Background technology

At present, known boiler body is mainly by steam-boiler, and stove is formed.The steam-boiler of boiler is by the water-cooling wall around drum, the burner hearth, the smoke pipe in the drum, the sealing steam-water circulation system that down-comer and last next part case are formed.The effect of steam-boiler is that the high-temperature flue gas of fuel combustion generation and the heat of flame are passed to water, and is heated into steam or the hot water with uniform temperature and pressure.But, the steam-boiler of boiler has only a steam-water circulation system at present, the feedwater of boiler enter behind the steam-boiler immediately with steam-boiler in be heated into uniform temperature carbonated drink convection current blending feed temperature rise rapidly, the high-temperature flue gas that fuel combustion generates in the stove and the heat of flame are being passed to hot water or the steam that has uniform temperature or higher temperature all the time, through after the heat exchange, the temperature of discharging flue gas is still higher, if use auxiliary heating surface can increase flue gas resistance again, makes the boiler structure complexity.

Summary of the invention

Can not solve all heat transfer problems in steam-boiler in order to overcome existing boiler, need the deficiency of auxiliary heating surface, the utility model provides a kind of boiler, and the thermal efficiency that this boiler can improve boiler reduces the smoke temperature.

The technical scheme that its technical problem that solves the utility model adopts is: by boiler steam-boiler branch pot body being set or dividing plate being set in the boiler steam pot steam-boiler of boiler is made two or more steam-water circulation systems, high-temperature flue gas and flame that the boiler fuel combustion generates are done reverse heat-exchange by the feedwater of steam-boiler each minute pot body and boiler, be exactly, boiler feedwater is introduced into the low temperature steam-water circulation system, enter the high temperature steam-water circulation system more successively, the heat of high-temperature flue gas and flame is passed to the high temperature steam-water circulation system earlier, pass to the low temperature steam-water circulation system more successively, like this, can reach the purpose of reverse heat-exchange stage by stage.

The beneficial effects of the utility model are to realize that the reverse heat-exchange stage by stage of boiler can effectively reduce boiler smoke temperature, raising boiler thermal output, omission boiler auxiliary heating surface, simplification boiler structure.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the vertical view of first embodiment of the utility model boiler.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is the front view of second embodiment of boiler.

Fig. 4 is the B-B cutaway view of Fig. 3.

1. first drums among the figure, 2. second drum, 3. the 3rd drum, 4. feed-water inlet, 5. vapour or water out, 6. smoke pipe, 7. front smoke box, 8. back smoke box, 9.10. connects flue, 11. dividing plates, 12. limbers, 13. second backhaul flues.

The specific embodiment

In embodiment illustrated in figures 1 and 2, the high-temperature flue gas that the burner hearth fuel combustion generates, carry out heat exchange with the water-cooling wall and first drum 1 earlier and heat first circulatory system, the smoke pipes 6 that flow through in second drum 2 by connection flue 9,10 heat second circulatory system then, and the smoke pipes that flow through in the 3rd drum 3 by front smoke box 7 heat third circulation system again.Boiler feedwater is introduced into the 3rd drum 3 by feed-water inlet 4 and enters second drum 2, first drum 1 successively by pipeline again.

In Fig. 3 and another embodiment shown in Figure 4, the high-temperature flue gas that the burner hearth fuel combustion generates enters front smoke box 7 through the second backhaul flue 13 and flows through first drum, 1 second drum 2 the 3rd drum 3 through smoke pipe 6, and boiler feedwater is introduced into the 3rd drum 3 by feed-water inlet 4 and enters second drum 2, first drum 1 by the limbers 12 on dividing plate 11 tops again.

Claims (2)

1. boiler, in the boiler body, drum, water screen tube, smoke pipe, down-comer and last next part case are formed the steam-water circulation system of sealing, it is characterized in that: the steam-boiler of boiler is provided with two or more pots of bodies, or in the pot body, dividing plate is set, form two or more steam-water circulation systems.

2. boiler according to claim 1, it is characterized in that: the branch pot body of boiler steam-boiler is by smoke box, smoke pipe, feed pipe or limbers series connection, water screen tube is connected with first drum, and the admission port on the 3rd drum is communicated with second, first drum by pipeline or limbers.

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