Maintenance method of water purifying filter element

Abstract

The invention provides a maintenance method of a water purifying filter element. The filter element is a hollow polyvinylidene fluoride fibrous membrane, the outer diameter and the inner diameter of which are respectively 1mm and 0.8mm. The maintenance method comprises the following steps: washing the front surface of the filter element by using 40-50 DEG C hot water every 60-80 minutes, backwashing by using 10-20 DEG C high purity water, and washing the front surface by using 10-20 DEG C high purity water again; and pickling the front surface of the filter element for 10-30 seconds by using 1% citric acid every three months. The maintenance method is simple, convenient and practical and can be used for prolonging the service life of the filter element and meeting the water quality requirements while ensuring production rate.

Description

technical field

[0001] The invention relates to the field of water filtering equipment, in particular to a method for maintaining filter elements. Background technique

[0002] At present, my country's urban water shortage is serious, and the urban water shortage problem has caused serious economic losses and social environmental problems. Water-deficient cities will gradually spread to all regions of the country from the currently concentrated eastern coastal cities in the northeast, north, and northwest regions. The development of new water sources, water conservation and sewage treatment are equally important.

[0003] Cherish every drop of water and recycle every drop of water has become the consensus of the whole society. In the face of increasingly serious water pollution, according to the characteristics of urban water use, a water recycling system should be established to achieve the purpose of comprehensive treatment and recycling.

[0004] However, pollution oft...

Examples

Embodiment Construction

[0016] The present invention provides a maintenance method for a water purification filter element. The filter element is a hollow fiber membrane made of polyvinylidene fluoride, wherein the outer diameter and inner diameter of the fiber are 1mm and 0.8mm respectively. The maintenance method includes:

[0017] 1) Carry out physical cleaning and maintenance every 60-80 minutes, including:

[0018] Washing the front side of the polyvinylidene fluoride fiber membrane with hot water at 40 to 50°C to remove the front filter impurities;

[0019] Using high-purity water at 10 to 20°C to perform backwashing from the back of the polyvinylidene fluoride fiber membrane, and allowing the high-purity water to permeate the fiber membrane;

[0020] Then use high-purity water at 10 to 20°C to wash the front side of the polyvinylidene fluoride fiber membrane;

[0021] 2) Chemical cleaning is performed every 3 months, including: pickling of the front side with 1% citric acid for 10 to 30 secon...

technical field

[0001] The invention relates to the field of water filtering equipment, in particular to a method for maintaining filter elements. Background technique

[0002] At present, my country's urban water shortage is serious, and the urban water shortage problem has caused serious economic losses and social environmental problems. Water-deficient cities will gradually spread to all regions of the country from the currently concentrated eastern coastal cities in the northeast, north, and northwest regions. The development of new water sources, water conservation and sewage treatment are equally important.

[0003] Cherish every drop of water and recycle every drop of water has become the consensus of the whole society. In the face of increasingly serious water pollution, according to the characteristics of urban water use, a water recycling system should be established to achieve the purpose of comprehensive treatment and recycling.

[0004] However, pollution oft...

Examples

Embodiment Construction

[0016] The present invention provides a maintenance method for a water purification filter element. The filter element is a hollow fiber membrane made of polyvinylidene fluoride, wherein the outer diameter and inner diameter of the fiber are 1mm and 0.8mm respectively. The maintenance method includes:

[0017] 1) Carry out physical cleaning and maintenance every 60-80 minutes, including:

[0018] Washing the front side of the polyvinylidene fluoride fiber membrane with hot water at 40 to 50°C to remove the front filter impurities;

[0019] Using high-purity water at 10 to 20°C to perform backwashing from the back of the polyvinylidene fluoride fiber membrane, and allowing the high-purity water to permeate the fiber membrane;

[0020] Then use high-purity water at 10 to 20°C to wash the front side of the polyvinylidene fluoride fiber membrane;

[0021] 2) Chemical cleaning is performed every 3 months, including: pickling of the front side with 1% citric acid for 10 to 30 secon...