Immersed-type ultrafiltration membrane pool and on-line chemical cleaning method thereof

Abstract

The invention relates to an immersed-type ultrafiltration membrane pool and an on-line maintaining and recovering chemical cleaning method thereof. According to the immersed-type ultrafiltration membrane pool, a pipeline system and a valve system are simplified as far as possible, so that pipeline arrangement of chemical cleaning circulation, a wastewater discharge system, a membrane pool water discharge system, a water back wash system, a gas back wash system, and the like is subjected to overall consideration, and sharing of part of pipelines and valves is realized. That is to say, a pump is used as a membrane pool filtration clean water suction pump and a membrane pool medicine cleaning water deliver pump; a pump is used as a membrane pool recovering chemical cleaning circulating pump and a membrane pool chemical cleaning effluent discharging pump; a valve is used as a membrane pool effluent discharging control valve and a membrane pool chemical cleaning circulating liquid feeding valve; a pipe is used as a membrane pool filtration clean water main pipe, a membrane pool back wash water main pipe, and a membrane pool chemical cleaning circulating discharging main pipe; and a pipe is used as a membrane pool chemical cleaning circulating main pipe and a membrane pool chemical washing effluent discharging main pipe.

Description

technical field [0001] The invention relates to a submerged ultrafiltration membrane tank, in particular to the arrangement of various valves and pipelines in the submerged ultrafiltration membrane tank, and its on-line maintenance chemical cleaning, alkali cleaning of on-line restorative chemical cleaning and on-line restorative chemical cleaning. Pickling method for cleaning. Background technique [0002] The ultrafiltration membrane process is known as the third-generation water treatment method, which can effectively ensure the turbidity of the effluent, completely remove bacteria, algae, and two insects in the water, and remove some viruses. In recent years, with the successful development of high-quality ultrafiltration membranes using PVC materials in my country, the construction and operation costs of ultrafiltration membrane treatment processes have dropped significantly. Commonly used ultrafiltration membrane columns include tubular, hollow fiber, plate-and-frame ...

AI Technical Summary

Problems solved by technology

In terms of chemical cleaning, due to the relatively large flux of the container-type ultrafiltration membrane, the chemical cleaning cycle is short, the operation is frequent, and the container-type ultrafiltration membrane has strong airtightness and integrity. In addition, the container-type ultrafiltration membrane has a small membrane area. , chemical washing dosage is less, so container-type ultrafiltration membranes mostly adopt online cleaning method; while submerged ultrafiltration membrane flux is relatively low, chemical washing, especially restorative chemical washing cycle is longer, and the membrane area is large, chemical washing The amount of medicine is large. In addition, the submerged ultrafiltration membrane tank is generally equipped with a pipe gallery. In order to avoid various types of pipelines in the pipe gallery, the submerged ultrafiltration membranes in actual projects currently use offline cleaning methods.

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