Suction membrane system online automatic exhaust device and automatic exhaust method

Abstract

The invention relates to an online automatic exhaust device and an automatic exhaust method for a suction membrane system, which can be used for microfiltration membranes, ultrafiltration membranes, and nanofiltration membrane systems that adopt suction operation. There is a liquid level controller in the gas tank of the online automatic exhaust device of the suction membrane system, the top of the gas collection tank is connected with one end of the isolation valve, and the other end of the isolation valve is connected with the automatic exhaust valve; The bottom end of the gas collection tank is connected with one end of the intake valve, and the water inlet valve is connected between the gas collection tank and the intake valve; the other end of the intake valve is connected with the membrane system, and the other end of the intake valve is also connected with the membrane system. One end of the backwash water inlet valve of the system is connected in parallel with one end of the water production valve of the membrane system; the other end of the backwash water inlet valve is connected with the backwash water pump of the membrane system; the other end of the water production valve of the membrane system is connected with the water production pump of the membrane system. Solve the problem of membrane module damage caused by retained gas entering the membrane module, so as to ensure the stable operation of the membrane system.

Description

technical field [0001] The invention relates to an online automatic exhaust device and an automatic exhaust method for a suction membrane system, which can be used for microfiltration membrane, ultrafiltration membrane and nanofiltration membrane system operated by suction. Background technique [0002] Membrane technology is a new practical technology. The membrane separation process is a physical separation process without phase change and low energy consumption. It has the characteristics of high efficiency, energy saving, no pollution, convenient operation, low engineering cost and wide application. At present, membrane technology has It is widely used in many fields. [0003] The operation mode of the membrane system is divided into pressure type and suction type. The suction membrane system is widely used due to its advantages of low operating pressure, low energy consumption and simple control. [0004] During the operation of the suction membrane system, due to its...

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Problems solved by technology

[0006] The present invention provides an online automatic exhaust device and an automatic exhaust method for a suction membrane system in order to overcome the problems of the existing membrane system such as increased filtration resistance caused by pipeline gas collection during operation.

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