Blower or induced draft device for pressurization of flammable, explosive and corrosive gases

Abstract

The invention relates to the field of fans, and particularly relates to a blowing or induced draft device for pressurizing combustible and explosive as well as corrosive gases. When a working gas is a hazardous gas which is high-pressure, combustible, explosive, corrosive and the like, as a protective gas is arranged in a pressure vessel, an inside-outside pressure difference of a fan can be decreased; and therefore, higher rising pressure can be safely provided. By using the blowing or induced draft device for pressurizing the inflammable and explosive as well as corrosive gases, the pressure vessel is only needed to be filled with the protective gas, and a magnetic driver is not needed to be arranged additionally; therefore, the manufacturing cost is low; the structure is simple; and the production is easy. According to the blowing or induced draft device for pressurizing the inflammable and explosive as well as corrosive gases, a pressure gauge is adopted to monitor gas pressure in the pressure vessel and a gas inlet; the absolute value of a pressure difference between the protective gas and the working gas is guaranteed to meet the pressure resistance of a shell of the fan; therefore, the safe running of the fan is guaranteed; and moreover, the manual monitoring is not needed.

Description

technical field [0001] The invention relates to the field of fans, in particular to a blower or air induction device for pressurizing inflammable, explosive and corrosive gases. Background technique [0002] The fans commonly used in the industry include centrifugal fans, axial fans, vortex fans and Roots fans. In different working conditions, fans can be used for blowing air or for inducing air. Regardless of the type of fan, there is an air inlet and an exhaust port. The air or working gas enters the fan casing through the air inlet, passes through the fan to increase the pressure, and then is discharged from the exhaust port. The pressure of the exhaust gas is higher than that of the inhaled gas. Pressure, the difference is generally called boost. The boost pressure of different fans is different. People use the boost pressure of fans to overcome the system resistance in industrial devices to complete certain processes, and the pressure of the working gas in different pr...

AI Technical Summary

Problems solved by technology

[0004] However, if the fan leaks, the electric spark generated when the motor is working may detonate the flammable and explosive gas, and the corrosive gas may also corrode and damage the motor

In order to prevent this from happening, the existing technical solution is to arrange the fan drive motor outside the pressure vessel, and drive the fan through a magnetic driver, thus avoiding the danger of the flammable and explosive gas being detonated or the motor being damaged by the corrosive gas, but , the cost of the magnetic drive is high, and the process requirements are high, which brings certain obstacles to the production and promotion

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