CN106396073B - Water treatment device and method for removing pollutants by using ozone-OH - Google Patents

Abstract

The invention relates to a water treatment device and method for removing pollutants by using ozone-OH. The device includes a cylindrical shell, and a water outlet is installed on the left side of the top of the shell. The dosing port, the upper sampling port, the middle sampling port and the lower sampling port are installed, and the bottom of the shell is connected with the ozone aeration port pipe through the flange, and the water inlet is installed on the side wall of the aeration port pipe. The middle and lower part of the casing is equipped with an activated carbon packed column. The method includes: the first step is to determine the dosage formula of the reaction system of activated carbon, ozone and p-chlorobenzoic acid according to the test data and the fitting model; the second step is to control the flow rate of the sewage. The reagent formula and dosage used in the present invention can promote the decomposition of ozone to generate a large amount of OH in the reaction process, and efficiently remove pollutants by generating a large amount of OH.

Description

Water treatment device and method for removing pollutants by using ozone-OH

technical field

The invention belongs to the technical field of water treatment, in particular to a water treatment device and method for removing pollutants by using ozone-OH·.

Background technique

Under different pH conditions, the reaction process of heterogeneous ozone catalytic oxidation is divided into three steps:

The first step process, the homogeneous decomposition of ozone

O ₃ In→O ₃ ^·- +In ⁺ (1-3)

The second step process, multiphase decomposition on the surface of activated carbon

2<pH<6:

pH>6:

The second step process, homogeneous diffusion of free radicals and termination reaction

In the above formula, S is the catalyst surface, In is a group that promotes the decomposition of ozone, and P is a hydroxyl radical scavenger. The second step process, formula (1-5) to formula (1-11), is the surface chemical reaction of activated carbon, Involving processes such as adsorption, surface reaction, and desorption, the third step process, formula (1-12) to formula (1-15), is carried out in a liquid phase reaction system.

Contents of the invention

The purpose of the present invention is to propose a water treatment device and method that utilizes ozone-OH· to remove pollutants against the deficiencies of the prior art.

The present invention solves its technical problem and realizes by taking the following technical solutions:

A water treatment device that uses ozone-OH to remove pollutants, including a cylindrical shell of the device, a water outlet is installed on the left side of the top of the shell, and a dosing device is installed sequentially on the right side of the shell from top to bottom Port, upper sampling port, middle sampling port and lower sampling port, the bottom end of the housing is connected with the ozone aeration port pipe through the flange, the water inlet is installed on the side wall of the aeration port pipe, and the middle part in the housing The lower part is equipped with an activated carbon packed column.

Moreover, the diameter of the activated carbon packed column is 1/3 to 1/2 of the shell diameter, and the distance between the activated carbon filled column and the bottom flange of the shell is 0.5 to 1.0 times the diameter of the activated carbon filled column. , the height of the activated carbon packed column is 5 to 8 times its own diameter, and 0.4 to 0.5 times the height of the shell.

Also, the shell is 1.5m high and 0.3m in diameter.

A method for a water treatment device utilizing ozone-OH to remove pollutants, the method comprising:

The first step is to determine the dosage formula of the reaction system of activated carbon, ozone and p-chlorobenzoic acid according to the experimental data and the fitting model,

Among them, the fitting model includes:

A polynomial model of degree one:

Quadratic polynomial model:

Among them, the dosage formula of the reaction system is: select activated carbon as the solid-phase catalyst, the dosage of activated carbon system is 5g, under the aeration conditions where the ozone concentration at the ozone aeration port is 16mg/L, and the ozone gas flow rate is 60L/h, the added p-chlor The dosage of benzoic acid is 3g/L;

The second step is to control the sewage flow rate, control the sewage to flow in from the bottom of the device shell, and flow out from the top of the device shell. The residence time of the treated sewage in the device shell is 2.5h to 3.5h.

Advantage and positive effect of the present invention are:

1, the used reagent formula and consumption of the inventive method can promote ozonolysis to produce OH. Produce a large amount of OH in the reaction process.

2. The device of the present invention can efficiently remove pollutants by generating a large amount of OH.

Description of drawings

Fig. 1 is a structural schematic diagram of the device of the present invention.

Detailed ways

The embodiments of the present invention are described in further detail below: It should be emphasized that the embodiments of the present invention are illustrative rather than limiting, so the present invention is not limited to the embodiments described in the specific implementation methods. Other implementations obtained by those skilled in the art according to the technical solution of the present invention also belong to the protection scope of the present invention.

A water treatment device that uses ozone-OH to remove pollutants, including a cylindrical housing 2 of the device, a water outlet 1 is installed on the left side of the top of the housing, and a water outlet is installed on the right side of the housing from top to bottom. The dosing port 3, the upper sampling port 4, the middle sampling port 6 and the lower sampling port 7 are connected with an ozone aeration port pipe 9 through a flange 8 at the bottom end of the housing, and installed on the side wall of the aeration port pipe The water inlet 10 is provided with an activated carbon packing column 5 in the middle and lower part of the housing.

In the specific implementation of the present invention, the diameter of the activated carbon packing column is 1/3 to 1/2 of the housing diameter, and the distance between the activated carbon filling column and the shell bottom flange is the diameter of the activated carbon filling column. The height of the activated carbon packed column is 5 to 8 times its own diameter, and 0.4 to 0.5 times the height of the shell.

In the specific implementation of the present invention, the housing is 1.5m high and 0.3m in diameter.

A method for a water treatment device utilizing ozone-OH to remove pollutants, the method comprising:

The first step is to determine the dosage formula of the reaction system of activated carbon, ozone and p-chlorobenzoic acid according to the experimental data and the fitting model, wherein the fitting model includes:

A polynomial model of degree one:

Quadratic polynomial model:

Among them, the dosage formula of the reaction system is: select activated carbon as the solid-phase catalyst, the dosage of the activated carbon system is 5g, and under the aeration conditions where the ozone concentration at the ozone aeration port is 16mg/L and the ozone gas flow rate is 60L/h, add p-chlorobenzene When formic acid is used as an auxiliary agent to promote the ozone oxidation process, the dosage of p-chlorobenzoic acid is 3g/L. It can promote the decomposition of ozone on the surface of activated carbon, generate hydroxyl radicals and release them into the liquid phase system, change the chain reaction of O3/OH·, and enhance the treatment effect.

The second step is to control the sewage flow rate, control the sewage to flow in from the bottom of the device shell, and flow out from the top of the device shell. The residence time of the treated sewage in the device shell is 2.5h to 3.5h. The treated sewage meets the national sewage discharge standard.

Claims (1)

1. a kind of method of the water treatment facilities using ozone-OH removal pollutant, it is characterised in that: the cylinder including device Shape shell, is equipped with water outlet in the top left side of shell, is sequentially installed with dosing mouth, upper layer from top to bottom on the right side of shell Sample tap, middle layer sample tap and lower layer's sample tap have ozonation aerated mouth pipeline by flanged joint in the bottom end of shell, are being aerated Water inlet is installed on the side wall of mouth pipeline, is mounted with active carbon in the intracorporal middle and lower part of shell and loads column；

The diameter of the active carbon filling column is the one third of diameter of the housing to half, and active carbon loads column away from shell bottom The distance of end flanges is 0.5 times to 1.0 times that active carbon loads column diameter, and the height that active carbon loads column is its own diameter 5 times to 8 times, be 0.4 times to 0.5 times of body height；

The high 1.5m of shell, diameter 0.3m；

The described method includes:

The first step determines that the reaction system dosage of active carbon, ozone and parachlorobenzoic-acid is matched according to test data and model of fit Side,

Wherein, model of fit includes:

Multinomial model:

Quadratic polynomial model:

Wherein, reaction system dosage formula are as follows: selection active carbon is solid-phase catalyst, and active carbon system dosage is 5g, in ozone Aeration opening ozone concentration is 16mg/L, and ozone gas flow velocity is under the aeration condition of 60L/h, and the parachlorobenzoic-acid dosage of addition is 3g/L；

Second step controls effluent flow rate, and control sewage is flowed by device housing bottom, processed by flowing out at the top of device housing Sewage residence time in device housing is 2.5h to 3.5h.