Yellow phosphorus tail gas combustion boiler

Abstract

The invention relates to a yellow phosphorus tail gas combustion boiler, which recovers heat energy by combustion of a boiler. The boiler comprises a combustion chamber (10), an intake cover (18), a gas spray gun (17), a steam drum (1), a smoke guide cover (7) and a flue, wherein the combustion chamber (10) is composed of a membrane type wall heat exchanger consisting of a membrane type wall (9), an upper header (8) and a lower header (11); the intake cover (18) is connected with the bottom of the lower header (11); the gas spray gun (17) is arranged in the intake cover (18); the inlet of the smoke guide cover (7) is connected with the top of the upper header (8), and the outlet thereof is connected with the flue; a deacidification device is arranged in the middle of the flue and divides the flue into a left flue (3) and a right flue (6); the right flue (6) is connected with a desulfurizing tower (23); and the center lines of the gas spray gun (17), the combustion chamber (10) and the smoke guide cover (7) are on the same center line. In the invention, the heat exchange surface of the boiler is effectively isolated from smoke containing corrosive materials by a protection gas, thus preventing the heat exchanger from being corroded by the corrosive materials.

Description

technical field [0001] The invention relates to a combustion boiler. Use boiler combustion to recover heat energy. It belongs to the technical field of combustion boilers. Background technique [0002] Some combustible gases now contain substances such as fluorine, sulfur, phosphorus, and arsenic, which will strongly corrode heat exchangers, air ducts and other equipment at a certain temperature during combustion. At present, no material has been found that has good thermal conductivity at high temperatures and can ensure that corrosive substances do not corrode the material. For example, in the production of yellow phosphorus, a large amount of yellow phosphorus tail gas CO gas contains several corrosive substances such as fluorine, sulfur, phosphorus, and arsenic, so the heat energy of yellow phosphorus tail gas combustion cannot be well recovered and utilized. Phosphorus tail gas combustion boilers cannot guarantee safe operation. At present, some enterprises purify t...

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Problems solved by technology

For example, in the production of yellow phosphorus, a large amount of yellow phosphorus tail gas CO gas contains several corrosive substances such as fluorine, sulfur, phosphorus, and arsenic, so the heat energy of yellow phosphorus tail gas combustion cannot be well recovered and utilized. Phosphorus tail gas combustion boilers cannot guarantee safe operation

At present, some enterprises purify the corrosive substances contained in the combustible gas before combustion, and use boiler combustion to recover heat energy after reaching the combustion standard. However, due to its high cost and complicated process, it has not been practically applied. The current yellow phosphorus tail gas CO is basically burned off when it is emitted

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