CN102069083B - Method for cleaning microporous aeration disc/pipe - Google Patents

Abstract

The invention discloses a method for cleaning a microporous aeration disc/pipe. The invention relates to a sewage treatment aeration technology. The purpose of the present invention is to provide a cleaning method of the microporous aeration disc/pipe with long service life of the microporous aeration disc. The technical solution of the present invention is a cleaning method of a microporous aerator, which is characterized in that it has the following steps: (1) Soak the surface-cleaned microporous aeration disc/pipe in the cleaning solution for 0.2-2 hours, the The above-mentioned cleaning solution is an aqueous solution of hydrochloric acid and formic acid, and the concentrations of both hydrochloric acid and formic acid are 0.4-0.6mol/L; (2) Put the soaked microporous aeration disc/pipe into an ultrasonic cleaning machine for ultrasonic cleaning for 10-20 The aeration effect can be restored after rinsing with clean water in minutes, and the frequency of the ultrasonic wave is 28-65KHZ. The invention is used for ultrasonic cleaning machines.

Description

A cleaning method for microporous aeration disc/pipe

Technical field:

The present invention relates to a sewage treatment aeration technology, especially a microporous aeration disc/pipe cleaning method for urban sewage treatment.

Background technique:

At present, the aeration discs/pipes widely used in urban sewage treatment are generally microporous aeration discs or tubes made of corundum or rubber. Such microporous aeration discs are easily blocked, resulting in reduced aeration effect , it needs to be cleaned to restore the aeration efficiency, but the current cleaning process is to spray the micropores of the aeration pan with formic acid to dissolve the sediment to achieve the purpose of cleaning. This cleaning process is due to the micropore sediment The removal of the microporous aeration disc is not complete, and it will be blocked after a short use time. Therefore, most sewage treatment plants directly replace the aeration disc with a new one without cleaning. The service life of this microporous aeration disc is generally 1-2 For example, the daily treatment capacity of Zhengzhou Wulongkou Sewage Treatment Plant is 100,000 tons, and the annual cost of replacing the aeration disc is 300,000 yuan.

Invention content:

The purpose of the present invention is to provide a cleaning method of the microporous aeration disc/pipe with long service life of the microporous aeration disc. The technical solution of the present invention is a cleaning method of a microporous aerator, which is characterized in that it has the following steps: (1) Soak the surface-cleaned microporous aeration disc/pipe in the cleaning solution for 0.2-2 hours, the The above-mentioned cleaning solution is an aqueous solution of hydrochloric acid and formic acid, and the concentrations of both hydrochloric acid and formic acid are 0.4-0.6mol/L; (2) Put the soaked microporous aeration disc/pipe into an ultrasonic cleaning machine for ultrasonic cleaning for 10-20 The aeration effect can be restored after rinsing with clean water in minutes, and the frequency of the ultrasonic wave is 28-65KHZ. The frequency of the ultrasonic wave is 40 KHZ. Compared with the prior art, the present invention has the remarkable advantages of good cleaning effect and long service life of the aeration disc.

Detailed ways:

The present invention is aimed at the poor effect of removing dirt in the micropores by spraying, and adopts cleaning solution immersion and ultrasonic cleaning methods, and optimizes the ultrasonic frequency of ultrasonic cleaning, so that the cleaned microporous aeration disc/pipe can be recycled and used Standard, thus prolonging the service life of the aeration pan and greatly reducing the cost of sewage treatment.

The present invention has following steps:

(1) Remove the sludge on the surface of the microporous aeration disc (or tube) taken from the aeration tank;

(2) Put the above disk (or tube) into the cleaning agent and soak for 0.2-2h. The cleaning agent is an aqueous solution of hydrochloric acid and formic acid. The concentrations of both hydrochloric acid and formic acid are 0.4-0.6mol/L. The material of the air disc or tube is related. The soaking time is generally 1-2 hours when the material is corundum, and the soaking time is generally 0.2-0.5 hours when the material is rubber;

(3) Put the soaked disk (tube) into an ultrasonic cleaning machine, and ultrasonically clean it for 10-20 minutes at room temperature, and the ultrasonic frequency is 28-65 KHZ, preferably 40 KHZ. Rinse the pan (pipe) with clean water after shutdown to restore the function of the microporous aeration pan (pipe).

Claims (2)

1. A method for cleaning a microporous aeration disc/pipe, characterized in that it has the following steps: (1) soaking the surface-cleaned microporous aeration disc/pipe in a cleaning solution for 0.2-2 hours, the cleaning solution It is an aqueous solution of hydrochloric acid and formic acid, both of which have a concentration of 0.4-0.6mol/L; (2) Put the soaked microporous aeration disc/pipe into an ultrasonic cleaner for 10-20 minutes and clean it with water The aeration effect can be restored by washing, and the frequency of the ultrasonic wave is 28-65KHZ. 2. The cleaning method of a microporous aeration disc/pipe according to claim 1, characterized in that: the frequency of the ultrasonic waves is 40 KHZ.