Ultrafiltration membrane emptying system

Abstract

The invention provides an ultrafiltration membrane emptying system comprising an ultrafiltration membrane assembly; the ultrafiltration membrane assembly comprises a membrane shell, membrane filaments, a water inlet, a water producing port and a concentrated water port; the membrane filaments are mounted on the inner side of the membrane shell, the water inlet and the water producing port are located at the lower end and the upper end of the membrane shell respectively, the water inlet is communicated with the outer surfaces of the membrane filaments, and the water producing port is communicated with an opening in the end of the membrane filaments; the concentrated water port is arranged on the side surface of the membrane shell, and the water inlet is communicated with the concentrated water port; the ultrafiltration membrane emptying system also comprises gas supply equipment, a concentrated water cut-off valve, a concentrated water gas intake valve, a water inlet cut-off valve and a discharge valve; the concentrated water port is communicated with the concentrated water cut-off valve through a pipeline, and the pipeline between the concentrated water port and the concentrated water cut-off valve is communicated with the gas supply equipment through the concentrated water inlet valve; and the water inlet is communicated with the water inlet cut-off valve through a pipeline, and the pipeline between the water inlet and the water inlet cut-off valve is communicated with the outside through the discharge valve. The emptying efficiency of the membrane module is improved by arranging a concentrated water pipeline for gas intake, and backwash water retention is avoided.

Description

technical field [0001] The invention relates to the technical field of water treatment equipment, in particular to an ultrafiltration membrane emptying system. Background technique [0002] With the gradual promotion of ultrafiltration membrane technology, it is widely used in many industries that have strict requirements on the concentration of product liquid, such as concentration separation and vehicle urea preparation. However, ultrafiltration membrane components need to be cleaned or maintained after working for a certain period of time. During cleaning and maintenance, the system needs to be emptied. The traditional ultrafiltration membrane module is emptied by backwashing and evacuation by gravity. It cannot be completely ruled out, and the final residual backwash solution will make the concentration of the product solution in the subsequent production treatment not reach the standard. Contents of the invention [0003] In view of this, the present invention propos...

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Problems solved by technology

[0002] With the gradual promotion of ultrafiltration membrane technology, it is widely used in many industries that have strict requirements on the concentration of product liquid, such as concentration separation and vehicle urea preparation. However, ultrafiltration membrane components need to be cleaned or maintained after working for a certain period of time. During cleaning and maintenance, the system needs to be emptied. The traditional ultrafiltration membrane module is evacuated by backwashing and evacuation by gravity. It cannot be completely ruled out, and the final residual backwash solution will make the concentration of the product solution in the subsequent production treatment not up to the standard

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