Horizontal flushing water tube type central back-firing boiler

Abstract

The invention discloses a central back combustion boiler with water pipes being transversely scoured. The central back combustion boiler with the water pipes being transversely scoured mainly comprises a combustor, a shell, a boiler furnace, a smoke transferring chamber and a box type heat exchanger. The central back combustion boiler with the water pipes being transversely scoured is characterized in that the boiler shell is a cuboid, the upper boiler furnace is arranged on the upper portion of the interior of the boiler shell, and the lower box type heat exchanger is arranged on the lower portion of the interior of the boiler shell; the boiler furnace is wavy, the internal combustion mode is central back combustion; the front end of the boiler furnace is welded to the smoke transferring chamber, and an oval sealing head is welded to the rear end of the boiler furnace; the multiple vertical heat exchange water pipes are arranged in the box type heat exchanger, an inlet of the box type heat exchanger is welded to the smoke transferring chamber, and an outlet of the box type heat exchanger is connected with a chimney or an economizer; the boiler furnace, the smoke transferring chamber and the box type heat exchanger are all immersed in boiler water, and a smoke heat exchange surface is a totally-wet back structure. During operation, high-temperature smoke is discharged from the front end of the boiler furnace, passes through the smoke transferring chamber and then enters the box type heat exchanger, the smoke transversely scours the heat exchange water pipes arranged in a staggered mode and heats water in the water pipes, and hot water rises and is discharged from a water outlet pipe on the upper portion of the boiler after being heated again through the boiler furnace. The central back combustion boiler is simple in structure, the heat exchange effect is good due to the fact that the smoke transversely scours pipe bundles, and the heat efficiency of the boiler is high.

Description

technical field [0001] The invention relates to the technical field of horizontal oil-fired gas-fired boilers, in particular to a horizontal flushing water tube type central back-firing boiler. Background technique [0002] With the development of the national economy and the improvement of people's living standards, the energy consumption structure occupies a pivotal position in economic development. At present, coal-fired domestic and industrial boilers that are widely used and widely distributed have high energy consumption and serious pollution, which directly cause ambient air pollution, affect people's physical and mental health, and greatly restrict the development of the national economy. That is to say, existing coal-fired boilers have problems such as high energy consumption and serious pollution. Therefore, using gas as an industrial and civil fuel has become an ideal choice at present, and gas boilers will occupy an increasingly important position in our lives. ...

AI Technical Summary

Problems solved by technology

[0003] The front smoke box of the existing boiler is a dry back structure surrounded by the front tube plate, front door cover and connecting plate. The temperature inside the front smoke box of the boiler with positive pressure combustion can reach above 800°C; The structure, that is, the flue gas flows in the pipe, and the flue gas washes the heat exchange surface of the flue pipe longitudinally, and the surface heat transfer coefficient is low; the existing central back-firing boiler smoke chamber is generally a dry back structure, and the temperature of the front panel is relatively high when the boiler is running. Not only the heat dissipation loss is relatively large, but also the heat resistance and sealing performance of the smoke transfer chamber are relatively high

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