Once-through boiler capable of preventing high-temperature corrosion of water cooling wall

Abstract

The invention relates to the technical field of boilers, in particular to a once-through boiler capable of preventing high-temperature corrosion of a water cooling wall, which comprises a boiler body, a supporting mechanism, a combustion mechanism, a combustion-supporting mechanism and an air distribution mechanism are arranged on the boiler body, an adjusting mechanism is arranged on the combustion mechanism, a sealing mechanism is arranged on the combustion-supporting mechanism, and the adjusting mechanism is arranged on the combustion mechanism. The fuel injection direction of the combustion mechanism can be adjusted in advance, flame smoke generated by fuel is prevented from directly impacting the water cooling wall, and high-temperature corrosion to the water cooling wall is reduced. Through cooperation of the combustion-supporting mechanism and the sealing mechanism, fuel oil can be conveniently added into a hearth of the boiler body for supporting combustion under the condition that the coal quality is poor, more smoke generated by insufficient combustion is avoided, and then impact and corrosion to a water cooling wall tube are reduced; a layer of parallel air film can be formed on the surface of the water-cooled wall through the arranged air distribution mechanism, impact of smoke flow perpendicular to the surface of the water-cooled wall is reduced, and high-temperature corrosion to the water-cooled wall is further reduced.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to a once-through boiler with a waterproof cold wall subjected to high-temperature corrosion. Background technique [0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electric energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of heat energy; the once-through boiler refers to relying on the pressure of the feed water pump to make the water pass through Economizers, water walls, and superheaters all turn into superheated steam boilers, which are mostly used in thermal power plants. [0003] However, in the actual operation of traditional once-through boilers, after long-term use, the heating surface of the water-cooled wall is in contact with corrosive fuel containing high sulfur and high-temperature flue gas for a long time under high temperature and high pre...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a once-through boiler with a water-proof cold wall and high-temperature corrosion. By setting an adjustment mechanism, the fuel injection direction can be adjusted in advance, so as to prevent the flame smoke generated by the fuel from directly colliding with the water-cooled wall, so as to reduce the The high-temperature corrosion of the water-cooled wall is small, and the combustion-supporting mechanism can add fuel oil to the furnace of the boiler body to support combustion when the coal quality is not good, so as to avoid more smoke from insufficient combustion, thereby reducing the impact and corrosion of the water-cooled wall tube , by setting the air distribution mechanism to form a layer of parallel air film on the surface of the water cooling wall, reducing the impact of the flue gas flow perpendicular to the surface of the water cooling wall, and further reducing the high temperature corrosion of the water cooling wall

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