Integrated all-wet back center backfired boiler

Abstract

The invention discloses an integrated all-wet back central combustion boiler. The main components include a burner, a shell, a furnace, a smoke transfer chamber, a box-type heat exchanger, an economizer and a flow equalizer. It is characterized in that: the boiler The shell is a cuboid, and the furnace and box-type heat exchanger are respectively located at the upper and lower parts of the shell; the economizer uses spiral finned tubes, which are welded to the tail of the shell with an integrated design; the furnace, the smoke chamber and the box-type heat exchange All devices are submerged in furnace water to form a fully wet back structure; the combustion method is the central back-burning type. The fuel oil or gas burns back in the center of the furnace and conducts radiation heat exchange. The high-temperature flue gas discharged from the furnace passes through the smoke transfer chamber, the box heat exchanger and the economizer in sequence and then is discharged from the exhaust pipe; The water enters the economizer tube through the equalizer plate, is heated by the box heat exchanger and the furnace, and is finally discharged from the upper outlet pipe of the boiler. The boiler has a simple and compact structure, reasonable arrangement of heat exchange surfaces, and high thermal efficiency.

Description

technical field [0001] The invention relates to the technical field of fuel-fired gas hot water boilers, in particular to an integrated all-wet back center back-firing boiler. Background technique [0002] my country is the country with the most boiler production and use in the world today. Industrial boilers are used in all industries of production and life. How to further improve the efficiency of industrial boilers on the existing basis and achieve the purpose of energy conservation and environmental protection is a problem worthy of serious consideration. In order to recover the waste heat of the flue gas and improve the efficiency of the boiler, the existing industrial boilers usually use one or two tube-fin heat exchangers outside the boiler, which makes the entire boiler system not compact enough; and the existing boiler smoke chamber is generally dry Back structure, when the boiler is running, the temperature of the boiler tube plate or panel is high, not only the he...

AI Technical Summary

Problems solved by technology

In order to recover the waste heat of the flue gas and improve the efficiency of the boiler, the existing industrial boilers usually use one or two tube-fin heat exchangers outside the boiler, which makes the entire boiler system not compact enough; and the existing boiler smoke chamber is generally dry Back structure, when the boiler is running, the temperature of the boiler tube plate or panel is high, not only the heat loss is large, but also the heat resistance, sealing performance and processing technology of the tube plate or panel are high.

At present, most of the industrial boilers adopt the structure of lower furnace and smoke tube, that is, the furnace is set at the lower part of the shell, and the flue gas washes the heat exchange surface of the smoke tube longitudinally in the tube, and the heat transfer coefficient is low.

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