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What are the structural forms of electric boilers?
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What are the structural forms of electric boilers?
Author: administrator release date: 2020-03-25 14:59:59

   Gas fired boiler It is a special equipment that provides heat energy for enterprise production. Then, thermal efficiency is one of the main parameters of boiler quality. After several generations of upgrading, the boiler has been constantly focusing on improving the thermal efficiency of the boiler.

At present, clean burning gas fired boiler has become the mainstream equipment to meet the requirements of environmental protection enterprises. In the design of gas fired boiler, the furnace body is an important part. The gas boiler adopts the structure of wet back type furnace, which can save fuel and improve the thermal efficiency of the boiler.

There are two forms of gas boiler body, one is dry furnace back, the other is wet furnace back. The dry back structure has the advantages of simple manufacturing process and less consumables for manufacturers. But for users, high temperature flue gas (more than 1000 degrees) directly after the outlet of the furnace directly radiates the fire-resistant material in the smoke chamber, so that refractory materials that work in high temperature for a long time are easily damaged.

The structure of the wet back furnace does not cause trouble of burning, and at the same time, it greatly improves the combustion efficiency and thermal efficiency of the gas boiler. The fuel is in the positive pressure combustion of the fuel gas in the furnace chamber, and the high temperature flue gas passes along the furnace back to the first flue pipe bundle 180 times after the combustion chamber is turned back. After pressing the front smoke box to turn 180 degrees into the second tube bundle, the air is discharged into the atmosphere after convection heat transfer.

The advantage of the wet back structure of the gas boiler is that the reburning chamber behind the furnace is the wet back combustion chamber which is bubbling in the water. There is no trouble of burning. It is because the wet back chamber is surrounded by water, and it also improves the radiation heat transfer area and heat transfer efficiency of the boiler. This structure is very popular.

The fuel gas steam boiler adopts the classic three way backflow structure with a downstream wet back type, with a thermal efficiency of over 95%. The wet back structure combustor immersed in water has good cooling condition, and the rear tube plate is not washed by high temperature flue gas to change the operating environment of the boiler, thus increasing the service life. The corrugated furnace can increase the heating surface and relieve the damage of the combustion chamber caused by thermal expansion and cold contraction. Large furnace volume combustion, fully save fuel.

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