Sealing system for sulfur dioxide fan

Abstract

The invention relates to the technical field of sulfuric acid production industrial equipment sealing structures, in particular to a sealing system for a sulfur dioxide fan. The technical problems in the prior art that due to the fact that a sulfur dioxide gas leaks from a negative pressure end of a centrifugal multi-stage impeller sulfur dioxide fan, the total content of sulfur dioxide entering conversion is low, and effective compensation of the gas amount cannot be achieved are solved, and a sealing device is connected to a suction end shell of the sulfur dioxide fan to serve as a seal of a suction end rotor. A backflow pipe set is connected with the sealing device and a fan multi-stage impeller chamber and receives the negative pressure formed by guiding of the fan multi-stage impeller chamber. A control unit is used for controlling the opportunity that the backflow pipe set is guided by the fan multi-stage impeller chamber to form the negative pressure. The system has the advantages that the leakage amount of sulfur dioxide can be effectively reduced, the effective compensation total gas amount can be formed, an external medium does not need to be introduced, the impact on a production system is small when the gas amount is compensated, control over the process gas proportion is facilitated, and energy conservation and environmental protection are achieved.

Description

technical field [0001] The invention relates to the technical field of sealing structure of sulfuric acid production industrial equipment, in particular to a sealing system for a sulfur dioxide blower. Background technique [0002] Under the current trend, the development direction of the sulfuric acid industry will gradually replace the traditional pyrite acid production, and turn to the use of flue gas acid production and waste sulfuric acid pyrolysis acid production; flue gas acid production and waste sulfuric acid pyrolysis acid production can also obtain abundant The sulfur dioxide process gas will release the production of sulfuric acid from the status of high pollution and high energy consumption, and replace it with the method of collecting sulfur dioxide process gas to make acid, realize energy saving and environmental protection, and support the development of the chemical industry. [0003] It should be noted that the key to restricting the sulfur dioxide process ...

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Problems solved by technology

[0005] The present invention aims to solve the technical problem that there is sulfur dioxide gas leakage at the negative pressure end of the centrifugal multi-stage impeller sulfur dioxide blower in the prior art, which leads to a low total sulfur dioxide content in the conversion and cannot realize effective compensation of gas volume, and provides a sulfur dioxide blower. sealing system

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