Method for regenerating filter core of security filter

Abstract

The invention relates to a method for regenerating a filter core, and concretely relates to a method for regenerating performances of the filter core of a security filter in the sewage reuse. The method mainly comprises the following steps: 1, determining whether the filter core is polluted; 2, carrying out online sterilization by an bactericide; 3, carrying out online high-pressure flushing; 4, carrying out offline medicament solution immersion: selecting a sodium hypochlorite solution, a sodium hydroxide solution and a hydrochloric acid solution as cleaning medicaments; and 5, filling the regenerated filter core into the security filter for later use. The method which combines the online mode and the offline mode has the advantages of effective removal of filter core pollutants, realization of the reuse through the recovery of the performances of the filter core, system operation cost reduction, reduction of the pollution of waste and old filter cores to the environment, simple operation, and strong popularization.

Description

technical field [0001] The invention relates to a method for regenerating a filter element, in particular to a method for regenerating the performance of a filter element of a security filter in sewage reuse. Background technique [0002] Traditional desalination methods generally use ion exchange, electrodialysis, etc. In recent years, with the development of science and technology, advanced reverse osmosis desalination technology has been applied in the United States, Japan, France, Italy and other countries. my country began to introduce reverse osmosis devices in the water treatment of power plants in the late 1970s. In the 1990s, the development of reverse osmosis membranes became a hot spot. Now reverse osmosis technology is mainly used in seawater desalination, pure water and ultrapure water preparation, urban water supply treatment, Urban sewage treatment and application, industrial electroplating wastewater and pulp and paper industry wastewater treatment, chemical w...

AI Technical Summary

Problems solved by technology

In actual operation, there are not only residual fine granular substances in the sewage, but also colloids, organic matter and microbial pollutants. Therefore, after a period of use of the security filter element, the filter element will be polluted and blocked, and the water production will be reduced. Filtration The pressure difference between the inlet and outlet of the device rises

In the application, when the pressure difference between the inlet and outlet of the filter is greater than the set value, the filter element should be replaced in time. The service life of the filter element is related to the filtered water quality and water temperature. Generally, the service life of the security filter element is 3 months for water treated by ultrafiltration. The use cycle is shorter, and the cost of replacing the filter element is high every year, and the replaced waste filter element is easy to pollute the environment