Operation method of multi-stage parallel aeration blowers for sewage treatment

Abstract

The invention discloses an operation method of a multi-stage parallel aeration blower for sewage treatment, which is used for preventing the aeration blower from being started and merged into a main pipe network to be abnormal due to air flow impact influence. The on-off valve corresponding to the first air blower is opened, the other on-off valves are closed, the main pipe emptying valve is closed, then the branch pipe emptying valve corresponding to the first air blower is opened, the variable frequency motor of the first air blower is started, and the outlet guide vane of the first air blower is automatically opened by an initial value; an inlet guide vane of the first air blower is automatically adjusted along with an outlet guide vane, and when a variable frequency motor of the first air blower reaches the rated frequency, a branch pipe emptying valve corresponding to the first air blower is closed; and opening the on-off valve corresponding to the second air blower, gradually opening the main pipe emptying valve by an opening degree so as to reduce the pressure of the pipe network by 5-15KPa, then starting the variable frequency motor of the second air blower, repeating the starting process of the started air blower by the second air blower, and then closing the main pipe emptying valve so as to complete the grid connection of the second air blower.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for operating a multi-stage parallel aeration blower for sewage treatment. Background technique [0002] As one of the core equipment of sewage treatment, the aeration blower is widely used in the treatment of industrial wastewater and urban sewage. Air blowers can no longer meet the requirements for use. In order to increase the amount of aeration, sewage treatment plants generally select multiple aeration blowers in parallel for centralized air supply. [0003] Multiple parallel aeration blowers solve the problem of insufficient air consumption, but when the first blower has been started, there is a high pressure in the pipe network, and at the same time, the pressure difference between the front and rear valves of the one-way valve in the pipe network reaches the opening The one-way valve can only be opened when the pressure is high, so the outlet pressure o...

AI Technical Summary

Problems solved by technology

If the aeration blower cannot be started normally and connected to the grid, a large amount of domestic sewage will be discharged into the river, seriously polluting the environment

[0004] In order to solve the problem that the outlet of the aeration blower is abnormally merged into the main network due to the opening pressure difference of the one-way valve and the impact of the air flow when the valve is opened instantaneously, and reduce environmental pollution and economic losses of the enterprise, the present invention designs a Start-up and grid-connected operation method of multi-stage parallel aeration blower for sewage treatment

Images