Integral microporous filtering method and device for water treatment

Abstract

The present invention relates to water treatment, and is especially integral microporous filtering method and device for treating low permeating oil field water flooding, sewage and high standard water. The device of the present invention is one closed container with one filtering layer of active carbon fiber felt, one 5 micron level polyethylene filtering plate, and one hollow fiber membrane assembly of 0.2-0.4 micron pore size successively packed from the water inlet to the water outlet. The present invention can treat water in different purifying standards and reach different treating amount.

Description

technical field [0001] The invention relates to a water treatment method and device thereof. In particular, it relates to an integrated microporous filtration method and device for low-permeability oilfield injection water quality treatment, sewage treatment and reuse, and high-standard water treatment. Background technique [0002] In the world, low-permeability oil fields are abundant in resources. In my country, the distribution of low-permeability oil fields is also very wide. Therefore, the development of low-permeability oilfields plays an important role in the current and future development of oilfields in my country. [0003] One of the key technologies in the development of low-permeability oilfields is to ensure that the injection water quality is up to standard. The water quality of low-permeability oilfield water injection standards generally meets the following indicators: the total suspended matter is less than or equal to 1 mg / l, the median particle size is...

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Problems solved by technology

However, the disadvantage of this method is that after the oilfield wastewater has been treated by microfiltration or ultrafiltration, it needs to be treated by nanofiltration or reverse osmosis to meet the water injection requirements.

This invention relates to the microfiltration membrane separation technology for specific waste water in the middle stage of papermaking, so its disadvantages are: 1. It is too targeted and difficult to be popularized; 2. In the above method, because the membrane module itself has high environmental requirements Generally, it is necessary to place the membrane processing equipment in a factory building with heating, ventilation and lighting conditions, thus increasing the cost of membrane technology application, and it is difficult to adapt to the harsh environmental conditions on site, which limits its application range; 3. In addition, in In the above methods, the problem of membrane cleaning is not well solved, and the service life of the membrane is short, so there is no economic advantage

Although this method has a simple pretreatment process and low device cost, it still has the disadvantage that the membrane treatment equipment needs to be placed indoors and it is difficult to adapt to the harsh on-site environment.

[0008] In addition, in the treatment of various high-standard water such as drinking water, process water, etc., the existing microfiltration membrane technology still has high requirements for influent water quality, poor backwash regeneration ability, and poor Due to the high requirements of the application environment and other reasons, most of them are used as pretreatment for reverse osmosis, which greatly limits the application range and effect

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