Iron pollution micro-filtration/ultra-filtration film cleaning equipment and cleaning method

Abstract

The invention discloses iron pollution micro-filtration / ultra-filtration film cleaning equipment and a cleaning method. The equipment comprises a cleaning water tank, a cleaning water pump, a film module region and a manganese sand filter which circularly communicate with one another successively through pipes, wherein a chemical agent feeding opening is formed in the top end of the cleaning water tank; cleaning water inlet valves are arranged on water inlet pipes of the cleaning water pump and the film module region; a water producing end of the film module region is connected with a water inlet of the manganese sand filter through a water producing pipe; a concentrated water end of the film module region is connected with the water inlet of the manganese sand filter through a concentrated water pipe; and water returning valves are respectively arranged on the water producing pipe and the concentrated water pipe. The cleaning method comprises the steps of circular soaking and backwashing and backflushing. According to the cleaning equipment, the cleaning water tank, the cleaning water pump, the film module region and the manganese sand filter communicate with one another circularly, a film module is soaked circularly and subjected to backwashing and backflushing treatment by liquor, iron pollution can be removed effectively, and the equipment occupies small space and can move, is low in energy consumption, and is economical, practical, safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of membrane fouling cleaning, and in particular relates to cleaning equipment and a cleaning method for iron polluted microfiltration / ultrafiltration membranes. Background technique [0002] Membrane separation technology refers to the technology that achieves selective separation of a mixture of molecules with different particle sizes at the molecular level when they pass through a semi-permeable membrane. Membrane separation technology has been widely used in the field of water treatment, including drinking water, sewage treatment, reclaimed water reuse, seawater desalination and ultrapure water preparation. However, with the development of industrialization, industrial wastewater and domestic sewage are discharged into water bodies, and urban sewage and groundwater are polluted by various organic substances, heavy metals and other substances, which aggravates membrane pollution and greatly restricts the v...

AI Technical Summary

Problems solved by technology

[0004] After the microfiltration / ultrafiltration membrane is contaminated by iron, it is routinely cleaned with citric acid, which increases the cleaning frequency and poor cleaning effect, which increases the operating cost and reduces the reliability of water supply

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